feat: ability to create new nodes on enter and delete old nodes on delete

.tmuxinator.yml

@@ -21,4 +21,4 @@ windows:
   - database:
       root: ./
       panes:
-        - pgcli postgres://taskcafe:taskcafe_test@localhost:5432/taskcafe
+        - pgcli postgres://taskcafe:taskcafe_test@localhost:8855/taskcafe

frontend/package.json

@@ -12,6 +12,7 @@
     "@types/jest": "^24.0.0",
     "@types/jwt-decode": "^2.2.1",
     "@types/lodash": "^4.14.149",
+    "@types/marked": "^1.2.2",
     "@types/node": "^12.0.0",
     "@types/query-string": "^6.3.0",
     "@types/react": "^16.9.21",
@@ -22,6 +23,7 @@
     "@types/react-router-dom": "^5.1.3",
     "@types/react-select": "^3.0.13",
     "@types/react-timeago": "^4.1.1",
+    "@types/react-window": "^1.8.2",
     "@types/styled-components": "^5.0.0",
     "apollo-cache-inmemory": "^1.6.5",
     "apollo-client": "^2.6.8",
@@ -41,6 +43,7 @@
     "immer": "^6.0.3",
     "jwt-decode": "^2.2.0",
     "lodash": "^4.17.20",
+    "marked": "^2.0.0",
     "prop-types": "^15.7.2",
     "query-string": "^6.13.7",
     "react": "^16.12.0",
@@ -56,6 +59,8 @@
     "react-select": "^3.1.0",
     "react-timeago": "^4.4.0",
     "react-toastify": "^6.0.8",
+    "react-visibility-sensor": "^5.1.1",
+    "react-window": "^1.8.6",
     "rich-markdown-editor": "^10.6.5",
     "styled-components": "^5.0.1",
     "typescript": "~3.7.2"

frontend/src/Admin/index.tsx

@@ -182,7 +182,7 @@ const AdminRoute = () => {
       updateApolloCache<UsersQuery>(client, UsersDocument, cache =>
         produce(cache, draftCache => {
           draftCache.invitedUsers = cache.invitedUsers.filter(
-            u => u.id !== response.data.deleteInvitedUserAccount.invitedUser.id,
+            u => u.id !== response.data?.deleteInvitedUserAccount.invitedUser.id,
           );
         }),
       );
@@ -192,7 +192,7 @@ const AdminRoute = () => {
     update: (client, response) => {
       updateApolloCache<UsersQuery>(client, UsersDocument, cache =>
         produce(cache, draftCache => {
-          draftCache.users = cache.users.filter(u => u.id !== response.data.deleteUserAccount.userAccount.id);
+          draftCache.users = cache.users.filter(u => u.id !== response.data?.deleteUserAccount.userAccount.id);
         }),
       );
     },
@@ -203,7 +203,7 @@ const AdminRoute = () => {
         query: UsersDocument,
       });
       const newData = produce(cacheData, (draftState: any) => {
-        draftState.users = [...draftState.users, { ...createData.data.createUserAccount }];
+        draftState.users = [...draftState.users, { ...createData.data?.createUserAccount }];
       });
 
       client.writeQuery({

frontend/src/App/Routes.tsx

@@ -15,6 +15,7 @@ import styled from 'styled-components';
 import JwtDecode from 'jwt-decode';
 import { setAccessToken } from 'shared/utils/accessToken';
 import { useCurrentUser } from 'App/context';
+import Outline from 'Outline';
 
 const MainContent = styled.div`
   padding: 0 0 0 0;
@@ -25,12 +26,20 @@ const MainContent = styled.div`
   flex-grow: 1;
 `;
 
+type RefreshTokenResponse = {
+  accessToken: string;
+  setup?: null | { confirmToken: string };
+};
+
 const AuthorizedRoutes = () => {
   const history = useHistory();
   const [loading, setLoading] = useState(true);
   const { setUser } = useCurrentUser();
   useEffect(() => {
+    const abortController = new AbortController();
+
     fetch('/auth/refresh_token', {
+      signal: abortController.signal,
       method: 'POST',
       credentials: 'include',
     }).then(async x => {
@@ -54,6 +63,9 @@ const AuthorizedRoutes = () => {
       }
       setLoading(false);
     });
+    return () => {
+      abortController.abort();
+    };
   }, []);
   return loading ? null : (
     <Switch>
@@ -62,6 +74,7 @@ const AuthorizedRoutes = () => {
         <Route exact path="/projects" component={Projects} />
         <Route path="/projects/:projectID" component={Project} />
         <Route path="/teams/:teamID" component={Teams} />
+        <Route path="/outline" component={Outline} />
         <Route path="/profile" component={Profile} />
         <Route path="/admin" component={Admin} />
       </MainContent>

frontend/src/App/TopNavbar.tsx

@@ -167,7 +167,7 @@ const ProjectFinder = () => {
   return <span>error</span>;
 };
 type ProjectPopupProps = {
-  history: History<History.PoorMansUnknown>;
+  history: any;
   name: string;
   projectID: string;
 };
@@ -182,7 +182,7 @@ export const ProjectPopup: React.FC<ProjectPopupProps> = ({ history, name, proje
 
       const newData = produce(cacheData, (draftState: any) => {
         draftState.projects = draftState.projects.filter(
-          (project: any) => project.id !== deleteData.data.deleteProject.project.id,
+          (project: any) => project.id !== deleteData.data?.deleteProject.project.id,
         );
       });
 

frontend/src/App/index.tsx

@@ -46,10 +46,6 @@ const StyledContainer = styled(ToastContainer).attrs({
 `;
 
 const history = createBrowserHistory();
-type RefreshTokenResponse = {
-  accessToken: string;
-  isInstalled: boolean;
-};
 
 const App = () => {
   const [user, setUser] = useState<CurrentUserRaw | null>(null);

frontend/src/Outline/DragDebug.tsx

@@ -0,0 +1,24 @@
+import React from 'react';
+import { DragDebugWrapper } from './Styles';
+
+type DragDebugProps = {
+  zone: ImpactZone | null;
+  depthTarget: number;
+  draggedNodes: Array<string> | null;
+};
+
+const DragDebug: React.FC<DragDebugProps> = ({ zone, depthTarget, draggedNodes }) => {
+  let aboveID = null;
+  let belowID = null;
+  if (zone) {
+    aboveID = zone.above ? zone.above.node.id : null;
+    belowID = zone.below ? zone.below.node.id : null;
+  }
+  return (
+    <DragDebugWrapper>{`aboveID=${aboveID} / belowID=${belowID} / depthTarget=${depthTarget} draggedNodes=${
+      draggedNodes ? draggedNodes.toString() : null
+    }`}</DragDebugWrapper>
+  );
+};
+
+export default DragDebug;

frontend/src/Outline/DragIndicator.tsx

@@ -0,0 +1,41 @@
+import React from 'react';
+import { getDimensions } from './utils';
+import { DragIndicatorBar } from './Styles';
+
+type DragIndicatorProps = {
+  container: React.RefObject<HTMLDivElement>;
+  zone: ImpactZone;
+  depthTarget: number;
+};
+
+const DragIndicator: React.FC<DragIndicatorProps> = ({ container, zone, depthTarget }) => {
+  let top = 0;
+  let width = 0;
+  if (zone.below === null) {
+    if (zone.above) {
+      const entry = getDimensions(zone.above.dimensions.entry);
+      const children = getDimensions(zone.above.dimensions.children);
+      if (children) {
+        top = children.top;
+        width = children.width - depthTarget * 35;
+      } else if (entry) {
+        top = entry.bottom;
+        width = entry.width - depthTarget * 35;
+      }
+    }
+  } else if (zone.below) {
+    const entry = getDimensions(zone.below.dimensions.entry);
+    if (entry) {
+      top = entry.top;
+      width = entry.width - depthTarget * 35;
+    }
+  }
+  let left = 0;
+  if (container && container.current) {
+    left = container.current.getBoundingClientRect().left + (depthTarget - 1) * 35;
+    width = container.current.getBoundingClientRect().width - depthTarget * 35;
+  }
+  return <DragIndicatorBar top={top} left={left} width={width} />;
+};
+
+export default DragIndicator;

frontend/src/Outline/Dragger.tsx

@@ -0,0 +1,385 @@
+import React, { useRef, useCallback, useState, useMemo, useEffect } from 'react';
+import { Dot } from 'shared/icons';
+import styled from 'styled-components';
+import {
+  findNextDraggable,
+  getDimensions,
+  getTargetDepth,
+  getNodeAbove,
+  getBelowParent,
+  findNodeAbove,
+  getNodeOver,
+  getLastChildInBranch,
+  findNodeDepth,
+} from './utils';
+import { useDrag } from './useDrag';
+
+const Container = styled.div`
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  width: 18px;
+  height: 18px;
+  border-radius: 9px;
+  background: rgba(${p => p.theme.colors.primary});
+  svg {
+    fill: rgba(${p => p.theme.colors.text.primary});
+    stroke: rgba(${p => p.theme.colors.text.primary});
+  }
+`;
+
+type DraggerProps = {
+  container: React.RefObject<HTMLDivElement>;
+  draggedNodes: { nodes: Array<string>; first?: OutlineNode | null };
+  isDragging: boolean;
+  onDragEnd: (zone: ImpactZone) => void;
+  initialPos: { x: number; y: number };
+  pageRef: React.RefObject<HTMLDivElement>;
+};
+
+let timer: any = null;
+
+type windowScrollOptions = {
+  maxScrollX: number;
+  maxScrollY: number;
+  isInTopEdge: boolean;
+  isInBottomEdge: boolean;
+  edgeTop: number;
+  edgeBottom: number;
+  edgeSize: number;
+  viewportY: number;
+  $page: React.RefObject<HTMLDivElement>;
+};
+function adjustWindowScroll({
+  maxScrollY,
+  maxScrollX,
+  $page,
+  isInTopEdge,
+  isInBottomEdge,
+  edgeTop,
+  edgeBottom,
+  edgeSize,
+  viewportY,
+}: windowScrollOptions) {
+  // Get the current scroll position of the document.
+  if ($page.current) {
+    var currentScrollX = $page.current.scrollLeft;
+    var currentScrollY = $page.current.scrollTop;
+
+    // Determine if the window can be scrolled in any particular direction.
+    var canScrollUp = currentScrollY > 0;
+    var canScrollDown = currentScrollY < maxScrollY;
+
+    // Since we can potentially scroll in two directions at the same time,
+    // let's keep track of the next scroll, starting with the current scroll.
+    // Each of these values can then be adjusted independently in the logic
+    // below.
+    var nextScrollX = currentScrollX;
+    var nextScrollY = currentScrollY;
+
+    // As we examine the mouse position within the edge, we want to make the
+    // incremental scroll changes more "intense" the closer that the user
+    // gets the viewport edge. As such, we'll calculate the percentage that
+    // the user has made it "through the edge" when calculating the delta.
+    // Then, that use that percentage to back-off from the "max" step value.
+    var maxStep = 50;
+
+    // Should we scroll up?
+    if (isInTopEdge && canScrollUp) {
+      var intensity = (edgeTop - viewportY) / edgeSize;
+
+      nextScrollY = nextScrollY - maxStep * intensity;
+
+      // Should we scroll down?
+    } else if (isInBottomEdge && canScrollDown) {
+      var intensity = (viewportY - edgeBottom) / edgeSize;
+
+      nextScrollY = nextScrollY + maxStep * intensity;
+    }
+
+    // Sanitize invalid maximums. An invalid scroll offset won't break the
+    // subsequent .scrollTo() call; however, it will make it harder to
+    // determine if the .scrollTo() method should have been called in the
+    // first place.
+    nextScrollX = Math.max(0, Math.min(maxScrollX, nextScrollX));
+    nextScrollY = Math.max(0, Math.min(maxScrollY, nextScrollY));
+
+    if (nextScrollX !== currentScrollX || nextScrollY !== currentScrollY) {
+      $page.current.scrollTo(nextScrollX, nextScrollY);
+      return true;
+    } else {
+      return false;
+    }
+  }
+}
+
+const Dragger: React.FC<DraggerProps> = ({
+  draggedNodes,
+  container,
+  onDragEnd,
+  isDragging,
+  initialPos,
+  pageRef: $page,
+}) => {
+  const [pos, setPos] = useState<{ x: number; y: number }>(initialPos);
+  const { outline, impact, setImpact } = useDrag();
+  const $handle = useRef<HTMLDivElement>(null);
+  const handleMouseUp = useCallback(() => {
+    onDragEnd(impact ? impact.zone : { below: null, above: null });
+  }, [impact]);
+  const handleMouseMove = useCallback(
+    e => {
+      var t0 = performance.now();
+
+      e.preventDefault();
+      const { clientX, clientY, pageX, pageY } = e;
+      setPos({ x: clientX, y: clientY });
+      const { curDepth, curPosition, curDraggable } = getNodeOver({ x: clientX, y: clientY }, outline.current);
+      let depthTarget: number = 0;
+      let aboveNode: null | OutlineNode = null;
+      let belowNode: null | OutlineNode = null;
+
+      const edgeSize = 50;
+
+      const viewportWidth = document.documentElement.clientWidth;
+      const viewportHeight = document.documentElement.clientHeight;
+
+      var edgeTop = edgeSize + 80;
+      var edgeBottom = viewportHeight - edgeSize;
+
+      var isInTopEdge = clientY < edgeTop;
+      var isInBottomEdge = clientY > edgeBottom;
+
+      if ((isInBottomEdge || isInTopEdge) && $page.current) {
+        var documentWidth = Math.max(
+          $page.current.scrollWidth,
+          $page.current.offsetWidth,
+          $page.current.clientWidth,
+          $page.current.scrollWidth,
+          $page.current.offsetWidth,
+          $page.current.clientWidth,
+        );
+        var documentHeight = Math.max(
+          $page.current.scrollHeight,
+          $page.current.offsetHeight,
+          $page.current.clientHeight,
+          $page.current.scrollHeight,
+          $page.current.offsetHeight,
+          $page.current.clientHeight,
+        );
+
+        var maxScrollX = documentWidth - viewportWidth;
+        var maxScrollY = documentHeight - viewportHeight;
+
+        (function checkForWindowScroll() {
+          clearTimeout(timer);
+
+          if (
+            adjustWindowScroll({
+              maxScrollX,
+              maxScrollY,
+              edgeBottom,
+              $page,
+              edgeTop,
+              edgeSize,
+              isInBottomEdge,
+              isInTopEdge,
+              viewportY: clientY,
+            })
+          ) {
+            timer = setTimeout(checkForWindowScroll, 30);
+          }
+        })();
+      } else {
+        clearTimeout(timer);
+      }
+
+      if (curPosition === 'before') {
+        belowNode = curDraggable;
+      } else {
+        aboveNode = curDraggable;
+      }
+
+      // if belowNode has the depth of 1, then the above element will be a part of a different branch
+
+      const { relationships, nodes } = outline.current;
+      if (!belowNode || !aboveNode) {
+        if (belowNode) {
+          aboveNode = findNodeAbove(outline.current, curDepth, belowNode);
+        } else if (aboveNode) {
+          let targetBelowNode: RelationshipChild | null = null;
+          const parent = relationships.get(aboveNode.parent);
+          if (aboveNode.children !== 0 && !aboveNode.collapsed) {
+            const abr = relationships.get(aboveNode.id);
+            if (abr) {
+              const newTarget = abr.children[0];
+              if (newTarget) {
+                targetBelowNode = newTarget;
+              }
+            }
+          } else if (parent) {
+            const aboveNodeIndex = parent.children.findIndex(c => aboveNode && c.id === aboveNode.id);
+            if (aboveNodeIndex !== -1) {
+              if (aboveNodeIndex === parent.children.length - 1) {
+                targetBelowNode = getBelowParent(aboveNode, outline.current);
+              } else {
+                const nextChild = parent.children[aboveNodeIndex + 1];
+                targetBelowNode = nextChild ?? null;
+              }
+            }
+          }
+          if (targetBelowNode) {
+            const depthNodes = nodes.get(targetBelowNode.depth);
+            if (depthNodes) {
+              belowNode = depthNodes.get(targetBelowNode.id) ?? null;
+            }
+          }
+        }
+      }
+
+      // if outside outline, get either first or last item in list based on mouse Y
+      if (!aboveNode && !belowNode) {
+        if (container && container.current) {
+          const bounds = container.current.getBoundingClientRect();
+          if (clientY < bounds.top + bounds.height / 2) {
+            const rootChildren = outline.current.relationships.get('root');
+            const rootDepth = outline.current.nodes.get(1);
+            if (rootChildren && rootDepth) {
+              const firstChild = rootChildren.children[0];
+              belowNode = rootDepth.get(firstChild.id) ?? null;
+              aboveNode = null;
+            }
+          } else {
+            // TODO: enhance to actually get last child item, not last top level branch
+            const rootChildren = outline.current.relationships.get('root');
+            const rootDepth = outline.current.nodes.get(1);
+            if (rootChildren && rootDepth) {
+              const lastChild = rootChildren.children[rootChildren.children.length - 1];
+              const lastParentNode = rootDepth.get(lastChild.id) ?? null;
+
+              if (lastParentNode) {
+                const lastBranchChild = getLastChildInBranch(outline.current, lastParentNode);
+                if (lastBranchChild) {
+                  const lastChildDepth = outline.current.nodes.get(lastBranchChild.depth);
+                  if (lastChildDepth) {
+                    aboveNode = lastChildDepth.get(lastBranchChild.id) ?? null;
+                  }
+                }
+              }
+            }
+          }
+        }
+      }
+
+      if (aboveNode) {
+        const foundDepth = findNodeDepth(outline.current.published, aboveNode.id);
+        if (foundDepth === null) return;
+        for (let i = 0; i < draggedNodes.nodes.length; i++) {
+          const nodeID = draggedNodes.nodes[i];
+          if (foundDepth.ancestors.find(c => c === nodeID)) {
+            if (draggedNodes.first) {
+              belowNode = draggedNodes.first;
+              aboveNode = findNodeAbove(outline.current, aboveNode ? aboveNode.depth : 1, draggedNodes.first);
+            } else {
+              const foundDepth = findNodeDepth(outline.current.published, nodeID);
+              if (foundDepth === null) return;
+              const nodeDepth = outline.current.nodes.get(foundDepth.depth);
+              const targetNode = nodeDepth ? nodeDepth.get(nodeID) : null;
+              if (targetNode) {
+                belowNode = targetNode;
+
+                aboveNode = findNodeAbove(outline.current, foundDepth.depth, targetNode);
+              }
+            }
+          }
+        }
+      }
+
+      // calculate available depths
+
+      let minDepth = 1;
+      let maxDepth = 2;
+      if (aboveNode) {
+        const aboveParent = relationships.get(aboveNode.parent);
+        if (aboveNode.children !== 0 && !aboveNode.collapsed) {
+          minDepth = aboveNode.depth + 1;
+          maxDepth = aboveNode.depth + 1;
+        } else if (aboveParent) {
+          minDepth = aboveNode.depth;
+          maxDepth = aboveNode.depth + 1;
+          const aboveNodeIndex = aboveParent.children.findIndex(c => aboveNode && c.id === aboveNode.id);
+          if (aboveNodeIndex === aboveParent.children.length - 1) {
+            minDepth = belowNode ? belowNode.depth : minDepth;
+          }
+        }
+      }
+      if (aboveNode) {
+        const dimensions = outline.current.dimensions.get(aboveNode.id);
+        const entry = getDimensions(dimensions?.entry);
+        if (entry) {
+          depthTarget = getTargetDepth(clientX, entry.left, { min: minDepth, max: maxDepth });
+        }
+      }
+
+      let aboveImpact: null | ImpactZoneData = null;
+      let belowImpact: null | ImpactZoneData = null;
+      if (aboveNode) {
+        const aboveDim = outline.current.dimensions.get(aboveNode.id);
+        if (aboveDim) {
+          aboveImpact = {
+            node: aboveNode,
+            dimensions: aboveDim,
+          };
+        }
+      }
+      if (belowNode) {
+        const belowDim = outline.current.dimensions.get(belowNode.id);
+        if (belowDim) {
+          belowImpact = {
+            node: belowNode,
+            dimensions: belowDim,
+          };
+        }
+      }
+
+      setImpact({
+        zone: {
+          above: aboveImpact,
+          below: belowImpact,
+        },
+        depth: depthTarget,
+      });
+    },
+    [outline.current.nodes],
+  );
+  useEffect(() => {
+    document.addEventListener('mouseup', handleMouseUp);
+    document.addEventListener('mousemove', handleMouseMove);
+    return () => {
+      document.removeEventListener('mouseup', handleMouseUp);
+      document.removeEventListener('mousemove', handleMouseMove);
+    };
+  }, []);
+  const styles = useMemo(() => {
+    const position: 'fixed' | 'relative' = isDragging ? 'fixed' : 'relative';
+    return {
+      cursor: isDragging ? '-webkit-grabbing' : '-webkit-grab',
+      transform: `translate(${pos.x - 10}px, ${pos.y - 4}px)`,
+      transition: isDragging ? 'none' : 'transform 500ms',
+      zIndex: isDragging ? 2 : 1,
+      position,
+    };
+  }, [isDragging, pos]);
+
+  return (
+    <>
+      {pos && (
+        <Container ref={$handle} style={styles}>
+          <Dot width={18} height={18} />
+        </Container>
+      )}
+    </>
+  );
+};
+
+export default Dragger;

frontend/src/Outline/Entry.tsx

@@ -0,0 +1,377 @@
+import React, { useRef, useEffect, useCallback, useState } from 'react';
+import { Dot, CaretDown, CaretRight } from 'shared/icons';
+import _ from 'lodash';
+import marked from 'marked';
+import VisibilitySensor from 'react-visibility-sensor';
+
+import {
+  EntryChildren,
+  EntryWrapper,
+  EntryContent,
+  EntryInnerContent,
+  EntryHandle,
+  ExpandButton,
+  EntryContentEditor,
+  EntryContentDisplay,
+} from './Styles';
+import { useDrag } from './useDrag';
+import { getCaretPosition, setCurrentCursorPosition } from './utils';
+import useOnOutsideClick from 'shared/hooks/onOutsideClick';
+
+type EditorProps = {
+  text: string;
+  initFocus: null | { caret: null | number };
+  autoFocus: number | null;
+  onChangeCurrentText: (text: string) => void;
+  onDeleteEntry: (caret: number) => void;
+  onBlur: () => void;
+  handleChangeText: (caret: number) => void;
+  onDepthChange: (delta: number) => void;
+  onCreateEntry: () => void;
+  onNodeFocused: () => void;
+};
+const Editor: React.FC<EditorProps> = ({
+  text,
+  onCreateEntry,
+  initFocus,
+  autoFocus,
+  onChangeCurrentText,
+  onDepthChange,
+  onDeleteEntry,
+  onNodeFocused,
+  handleChangeText,
+  onBlur,
+}) => {
+  const $editor = useRef<HTMLInputElement>(null);
+  useOnOutsideClick($editor, true, () => onBlur(), null);
+  useEffect(() => {
+    if (autoFocus && $editor.current) {
+      $editor.current.focus();
+      $editor.current.setSelectionRange(autoFocus, autoFocus);
+      onNodeFocused();
+    }
+  }, [autoFocus]);
+  useEffect(() => {
+    if (initFocus && $editor.current) {
+      $editor.current.focus();
+      if (initFocus.caret) {
+        $editor.current.setSelectionRange(initFocus.caret ?? 0, initFocus.caret ?? 0);
+      }
+      onNodeFocused();
+    }
+  }, []);
+  return (
+    <EntryContentEditor
+      value={text}
+      ref={$editor}
+      onChange={e => {
+        onChangeCurrentText(e.currentTarget.value);
+      }}
+      onKeyDown={e => {
+        if (e.keyCode === 13) {
+          e.preventDefault();
+          // onCreateEntry(parentID, position * 2);
+          onCreateEntry();
+          return;
+        } else if (e.keyCode === 9) {
+          e.preventDefault();
+          onDepthChange(e.shiftKey ? -1 : 1);
+        } else if (e.keyCode === 8) {
+          const caretPos = e.currentTarget.selectionEnd;
+          if (caretPos === 0) {
+            // handleChangeText.flush();
+            // onDeleteEntry(depth, id, currentText, caretPos);
+            onDeleteEntry(caretPos);
+            e.preventDefault();
+            return;
+          }
+        } else if (e.key === 'z' && e.ctrlKey) {
+          e.preventDefault();
+          return;
+        }
+        handleChangeText(e.currentTarget.selectionEnd ?? 0);
+        // setCaretPos(e.currentTarget.selectionEnd ?? 0);
+        // handleChangeText();
+      }}
+    />
+  );
+};
+
+type EntryProps = {
+  id: string;
+  collapsed?: boolean;
+  onToggleCollapse: (id: string, collapsed: boolean) => void;
+  parentID: string;
+  onStartDrag: (e: { id: string; clientX: number; clientY: number }) => void;
+  onStartSelect: (e: { id: string; depth: number }) => void;
+  isRoot?: boolean;
+  selection: null | Array<{ id: string }>;
+  draggedNodes: null | Array<string>;
+  onNodeFocused: (id: string) => void;
+  text: string;
+  entries: Array<ItemElement>;
+  onTextChange: (id: string, prex: string, next: string, caret: number) => void;
+  onCancelDrag: () => void;
+  autoFocus: null | { caret: null | number };
+  onCreateEntry: (parent: string, nextPositon: number) => void;
+  position: number;
+  chain?: Array<string>;
+  onHandleClick: (id: string) => void;
+  onDepthChange: (id: string, parent: string, position: number, depth: number, depthDelta: number) => void;
+  onDeleteEntry: (depth: number, id: string, text: string, caretPos: number) => void;
+  depth?: number;
+};
+
+const Entry: React.FC<EntryProps> = ({
+  id,
+  text,
+  parentID,
+  isRoot = false,
+  selection,
+  onToggleCollapse,
+  autoFocus,
+  onStartSelect,
+  onHandleClick,
+  onTextChange,
+  position,
+  onNodeFocused,
+  onDepthChange,
+  onCreateEntry,
+  onDeleteEntry,
+  onCancelDrag,
+  onStartDrag,
+  collapsed = false,
+  draggedNodes,
+  entries,
+  chain = [],
+  depth = 0,
+}) => {
+  const $entry = useRef<HTMLDivElement>(null);
+  const $children = useRef<HTMLDivElement>(null);
+  const { setNodeDimensions, clearNodeDimensions } = useDrag();
+  if (autoFocus) {
+  }
+
+  const $snapshot = useRef<{ now: string; prev: string }>({ now: text, prev: text });
+  const [currentText, setCurrentText] = useState(text);
+  const [caretPos, setCaretPos] = useState(0);
+  const $firstRun = useRef<boolean>(true);
+  useEffect(() => {
+    if ($firstRun.current) {
+      $firstRun.current = false;
+      return;
+    }
+    console.log('updating text');
+    setCurrentText(text);
+  }, [text]);
+
+  const [editor, setEditor] = useState<{ open: boolean; caret: null | number }>({
+    open: false,
+    caret: null,
+  });
+  useEffect(() => {
+    if (autoFocus) setEditor({ open: true, caret: null });
+  }, [autoFocus]);
+  useEffect(() => {
+    $snapshot.current.now = currentText;
+  }, [currentText]);
+  const handleChangeText = useCallback(
+    _.debounce(() => {
+      onTextChange(id, $snapshot.current.prev, $snapshot.current.now, caretPos);
+      $snapshot.current.prev = $snapshot.current.now;
+    }, 500),
+    [],
+  );
+  const [visible, setVisible] = useState(false);
+  useEffect(() => {
+    if (isRoot) return;
+    if (!visible) {
+      clearNodeDimensions(id);
+      return;
+    }
+    if ($entry && $entry.current) {
+      setNodeDimensions(id, {
+        entry: $entry,
+        children: entries.length !== 0 ? $children : null,
+      });
+    }
+    return () => {
+      clearNodeDimensions(id);
+    };
+  }, [position, depth, entries, visible]);
+  let showHandle = true;
+  if (draggedNodes && draggedNodes.length === 1 && draggedNodes.find(c => c === id)) {
+    showHandle = false;
+  }
+  let isSelected = false;
+  if (selection && selection.find(c => c.id === id)) {
+    isSelected = true;
+  }
+  const renderMap: Array<number> = [];
+  const renderer = {
+    text(text: any) {
+      const localId = renderMap.length;
+      renderMap.push(text.length);
+      return `<span id="${id}_${localId}">${text}</span>`;
+    },
+    codespan(text: any) {
+      const localId = renderMap.length;
+      renderMap.push(text.length + 2);
+      return `<span class="markdown-code" id="${id}_${localId}">${text}</span>`;
+    },
+    strong(text: string) {
+      const idx = parseInt(text.split('"')[1].split('_')[1]);
+      renderMap[idx] += 4;
+      return text.replace('<span', '<span class="markdown-strong"');
+    },
+    em(text: string) {
+      const idx = parseInt(text.split('"')[1].split('_')[1]);
+      renderMap[idx] += 2;
+      return text.replace('<span', '<span class="markdown-em"');
+    },
+    del(text: string) {
+      const idx = parseInt(text.split('"')[1].split('_')[1]);
+      renderMap[idx] += 2;
+      return text.replace('<span', '<span class="markdown-del"');
+    },
+  };
+
+  // @ts-ignore
+  marked.use({ renderer });
+
+  const handleMouseDown = useCallback(
+    _.debounce((e: any) => {
+      onStartDrag({ id, clientX: e.clientX, clientY: e.clientY });
+    }, 100),
+    [],
+  );
+  return (
+    <VisibilitySensor
+      onChange={v => {
+        if (v) {
+          setVisible(v);
+        }
+      }}
+    >
+      <EntryWrapper isSelected={isSelected} isDragging={!showHandle}>
+        {!isRoot && (
+          <EntryContent>
+            {entries.length !== 0 && (
+              <ExpandButton onClick={() => onToggleCollapse(id, !collapsed)}>
+                {collapsed ? <CaretRight width={20} height={20} /> : <CaretDown width={20} height={20} />}
+              </ExpandButton>
+            )}
+            {showHandle && (
+              <EntryHandle
+                onMouseUp={() => {
+                  handleMouseDown.cancel();
+                  onHandleClick(id);
+                }}
+                onMouseDown={e => {
+                  handleMouseDown(e);
+                }}
+              >
+                <Dot width={18} height={18} />
+              </EntryHandle>
+            )}
+            <EntryInnerContent
+              onMouseDown={() => {
+                onStartSelect({ id, depth });
+              }}
+              ref={$entry}
+            >
+              {editor.open ? (
+                <Editor
+                  onDepthChange={delta => onDepthChange(id, parentID, depth, position, delta)}
+                  onBlur={() => setEditor({ open: false, caret: null })}
+                  onNodeFocused={() => onNodeFocused(id)}
+                  autoFocus={autoFocus ? (autoFocus.caret ? autoFocus.caret : 0) : null}
+                  initFocus={editor.open ? { caret: editor.caret } : null}
+                  text={currentText}
+                  onDeleteEntry={caret => {
+                    handleChangeText.flush();
+                    onDeleteEntry(depth, id, currentText, caret);
+                  }}
+                  onCreateEntry={() => {
+                    onCreateEntry(parentID, position * 2);
+                  }}
+                  onChangeCurrentText={text => setCurrentText(text)}
+                  handleChangeText={caret => {
+                    setCaretPos(caret);
+                    handleChangeText();
+                  }}
+                />
+              ) : (
+                <EntryContentDisplay
+                  onClick={e => {
+                    let offset = 0;
+                    let textNode: any;
+                    if (document.caretPositionFromPoint) {
+                      // standard
+                      const range = document.caretPositionFromPoint(e.pageX, e.pageY);
+                      console.dir(range);
+                      if (range) {
+                        textNode = range.offsetNode;
+                        offset = range.offset;
+                      }
+                    } else if (document.caretRangeFromPoint) {
+                      // WebKit
+                      const range = document.caretRangeFromPoint(e.pageX, e.pageY);
+                      if (range) {
+                        textNode = range.startContainer;
+                        offset = range.startOffset;
+                      }
+                    }
+
+                    const id = textNode.parentNode.id.split('_');
+                    const index = parseInt(id[1]);
+                    let caret = offset;
+                    for (let i = 0; i < index; i++) {
+                      caret += renderMap[i];
+                    }
+                    setEditor({ open: true, caret });
+                  }}
+                  dangerouslySetInnerHTML={{ __html: marked.parseInline(text) }}
+                />
+              )}
+            </EntryInnerContent>
+          </EntryContent>
+        )}
+        {entries.length !== 0 && !collapsed && (
+          <EntryChildren ref={$children} isRoot={isRoot}>
+            {entries
+              .sort((a, b) => a.position - b.position)
+              .map(entry => (
+                <Entry
+                  onDeleteEntry={onDeleteEntry}
+                  onHandleClick={onHandleClick}
+                  onDepthChange={onDepthChange}
+                  parentID={id}
+                  key={entry.id}
+                  onTextChange={onTextChange}
+                  position={entry.position}
+                  text={entry.text}
+                  depth={depth + 1}
+                  draggedNodes={draggedNodes}
+                  collapsed={entry.collapsed}
+                  id={entry.id}
+                  autoFocus={entry.focus}
+                  onNodeFocused={onNodeFocused}
+                  onStartSelect={onStartSelect}
+                  onStartDrag={onStartDrag}
+                  onCancelDrag={onCancelDrag}
+                  entries={entry.children ?? []}
+                  chain={[...chain, id]}
+                  selection={selection}
+                  onToggleCollapse={onToggleCollapse}
+                  onCreateEntry={onCreateEntry}
+                />
+              ))}
+          </EntryChildren>
+        )}
+      </EntryWrapper>
+    </VisibilitySensor>
+  );
+};
+
+export default Entry;

frontend/src/Outline/Styles.ts

@@ -0,0 +1,260 @@
+import styled, { css } from 'styled-components';
+import { mixin } from 'shared/utils/styles';
+
+export const EntryWrapper = styled.div<{ isDragging: boolean; isSelected: boolean }>`
+  position: relative;
+  ${props =>
+    props.isDragging &&
+    css`
+      &:before {
+        border-radius: 3px;
+        content: '';
+        position: absolute;
+        top: 2px;
+        right: -5px;
+        left: -5px;
+        bottom: -2px;
+        background-color: #eceef0;
+      }
+    `}
+  ${props =>
+    props.isSelected &&
+    css`
+      &:before {
+        border-radius: 3px;
+        content: '';
+        position: absolute;
+        top: 2px;
+        right: -5px;
+        bottom: -2px;
+        left: -5px;
+        background-color: ${mixin.rgba(props.theme.colors.primary, 0.75)};
+      }
+    `}
+`;
+
+export const EntryChildren = styled.div<{ isRoot: boolean }>`
+  position: relative;
+  ${props =>
+    !props.isRoot &&
+    css`
+      margin-left: 10px;
+      padding-left: 25px;
+      border-left: 1px solid ${mixin.rgba(props.theme.colors.text.primary, 0.6)};
+    `}
+`;
+
+export const PageContent = styled.div`
+  min-height: calc(100vh - 146px);
+  width: 100%;
+  position: relative;
+  display: flex;
+  flex-direction: column;
+  box-shadow: none;
+  user-select: none;
+  margin-left: auto;
+  margin-right: auto;
+  max-width: 700px;
+  padding-left: 56px;
+  padding-right: 56px;
+  padding-top: 24px;
+  padding-bottom: 24px;
+  text-size-adjust: none;
+`;
+
+export const DragHandle = styled.div<{ top: number; left: number }>`
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  position: fixed;
+  left: 0;
+  top: 0;
+  transform: translate3d(${props => props.left}px, ${props => props.top}px, 0);
+  transition: transform 0.2s cubic-bezier(0.2, 0, 0, 1);
+  width: 18px;
+  height: 18px;
+  color: rgb(75, 81, 85);
+  border-radius: 9px;
+`;
+export const RootWrapper = styled.div``;
+
+export const EntryHandle = styled.div`
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  position: absolute;
+  left: 501px;
+  top: 7px;
+  width: 18px;
+  height: 18px;
+  color: ${p => p.theme.colors.text.primary};
+  border-radius: 9px;
+  &:hover {
+    background: ${p => p.theme.colors.primary};
+  }
+  svg {
+    fill: ${p => p.theme.colors.text.primary};
+    stroke: ${p => p.theme.colors.text.primary};
+  }
+`;
+export const EntryContentDisplay = styled.div`
+  display: inline-flex;
+  align-items: center;
+  width: 100%;
+  font-size: 15px;
+  white-space: pre-wrap;
+  background: none;
+  outline: none;
+  border: none;
+  line-height: 24px;
+  min-height: 24px;
+  overflow-wrap: break-word;
+  position: relative;
+  padding: 0;
+  margin: 0;
+  color: ${p => p.theme.colors.text.primary};
+  user-select: none;
+
+  cursor: text;
+  .markdown-del {
+    text-decoration: line-through;
+  }
+  .markdown-code {
+    margin-top: -4px;
+    font-size: 16px;
+    line-height: 19px;
+    color: ${props => props.theme.colors.primary};
+    font-family: monospace;
+    padding: 4px 5px 0;
+    font-family: 'Consolas', Courier, monospace;
+    background: ${props => props.theme.colors.bg.primary};
+    display: inline-block;
+    vertical-align: middle;
+    border-radius: 4px;
+  }
+  .markdown-em {
+    margin-top: -4px;
+    font-style: italic;
+  }
+  .markdown-strong {
+    font-weight: 700;
+    color: #fff;
+  }
+  &:focus {
+    outline: 0;
+  }
+`;
+
+export const EntryContentEditor = styled.input`
+  width: 100%;
+  font-size: 15px;
+  padding: 0;
+  margin: 0;
+  white-space: pre-wrap;
+  background: none;
+  outline: none;
+  border: none;
+  line-height: 24px;
+  min-height: 24px;
+  overflow-wrap: break-word;
+  position: relative;
+  user-select: text;
+  color: ${p => p.theme.colors.text.primary};
+  &::selection {
+    background: #a49de8;
+  }
+  &:focus {
+    outline: 0;
+  }
+`;
+
+export const EntryInnerContent = styled.div`
+  padding-top: 4px;
+  font-size: 15px;
+  white-space: pre-wrap;
+  background: none;
+  outline: none;
+  border: none;
+  line-height: 24px;
+  min-height: 24px;
+  overflow-wrap: break-word;
+  position: relative;
+  user-select: text;
+  color: ${p => p.theme.colors.text.primary};
+  &::selection {
+    background: #a49de8;
+  }
+  &:focus {
+    outline: 0;
+  }
+`;
+
+export const DragDebugWrapper = styled.div`
+  position: absolute;
+  left: 42px;
+  bottom: 24px;
+  color: #fff;
+`;
+
+export const DragIndicatorBar = styled.div<{ left: number; top: number; width: number }>`
+  position: fixed;
+  width: ${props => props.width}px;
+  top: ${props => props.top}px;
+  left: ${props => props.left}px;
+  height: 4px;
+  border-radius: 3px;
+  background: rgb(204, 204, 204);
+`;
+
+export const ExpandButton = styled.div`
+  top: 6px;
+  cursor: default;
+  color: transparent;
+  position: absolute;
+  top: 6px;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  left: 478px;
+  width: 20px;
+  height: 20px;
+  svg {
+    fill: transparent;
+  }
+`;
+export const EntryContent = styled.div`
+  position: relative;
+  margin-left: -500px;
+  padding-left: 524px;
+
+  &:hover ${ExpandButton} svg {
+    fill: ${props => props.theme.colors.text.primary};
+  }
+`;
+
+export const PageContainer = styled.div`
+  overflow-y: auto;
+  overflow-x: hidden;
+`;
+
+export const PageName = styled.div`
+  position: relative;
+  margin-left: -100px;
+  padding-left: 100px;
+  margin-bottom: 10px;
+  border-color: rgb(170, 170, 170);
+  font-size: 26px;
+  font-weight: bold;
+  color: #fff;
+`;
+
+export const PageNameContent = styled.div`
+  white-space: pre-wrap;
+  line-height: 34px;
+  min-height: 34px;
+  overflow-wrap: break-word;
+  position: relative;
+  user-select: text;
+`;
+
+export const PageNameText = styled.span``;

frontend/src/Outline/index.tsx

@@ -0,0 +1,784 @@
+import React, { useState, useRef, useEffect, useMemo, useCallback, useContext, memo, createRef } from 'react';
+import { DotCircle } from 'shared/icons';
+import styled from 'styled-components/macro';
+import GlobalTopNavbar from 'App/TopNavbar';
+import _ from 'lodash';
+import produce from 'immer';
+import Entry from './Entry';
+import DragIndicator from './DragIndicator';
+import Dragger from './Dragger';
+import DragDebug from './DragDebug';
+import { DragContext } from './useDrag';
+
+import {
+  PageContainer,
+  DragDebugWrapper,
+  DragIndicatorBar,
+  PageContent,
+  EntryChildren,
+  EntryInnerContent,
+  EntryWrapper,
+  EntryContent,
+  RootWrapper,
+  EntryHandle,
+  PageNameContent,
+  PageNameText,
+  PageName,
+} from './Styles';
+import {
+  transformToTree,
+  findNode,
+  findNodeDepth,
+  getNumberOfChildren,
+  validateDepth,
+  getDimensions,
+  findNextDraggable,
+  getNodeOver,
+  getCorrectNode,
+  findCommonParent,
+  getNodeAbove,
+  findNodeAbove,
+} from './utils';
+import NOOP from 'shared/utils/noop';
+
+enum CommandType {
+  MOVE,
+  MERGE,
+  CHANGE_TEXT,
+  DELETE,
+  CREATE,
+}
+
+type MoveData = {
+  prev: { position: number; parent: string | null };
+  next: { position: number; parent: string | null };
+};
+
+type ChangeTextData = {
+  node: {
+    id: string;
+    parentID: string;
+    position: number;
+  };
+  caret: number;
+  prev: string;
+  next: string;
+};
+
+type DeleteData = {
+  node: {
+    id: string;
+    parentID: string;
+    position: number;
+    text: string;
+  };
+};
+
+type OutlineCommand = {
+  nodes: Array<{
+    id: string;
+    type: CommandType;
+    data: MoveData | DeleteData | ChangeTextData;
+  }>;
+};
+
+type ItemCollapsed = {
+  id: string;
+  collapsed: boolean;
+};
+
+function generateItems(c: number) {
+  const items: Array<ItemElement> = [];
+  for (let i = 0; i < c; i++) {
+    items.push({
+      collapsed: false,
+      focus: null,
+      id: `entry-gen-${i}`,
+      text: `entry-gen-${i}`,
+      parent: 'root',
+      position: 4096 * (6 + i),
+    });
+  }
+  return items;
+}
+
+const listItems: Array<ItemElement> = [
+  { id: 'root', text: '', position: 4096, parent: null, collapsed: false, focus: null },
+  { id: 'entry-1', text: 'entry-1', position: 4096, parent: 'root', collapsed: false, focus: null },
+  { id: 'entry-1-3', text: 'entry-1-3', position: 4096 * 3, parent: 'entry-1', collapsed: false, focus: null },
+  { id: 'entry-1-3-1', text: 'entry-1-3-1', position: 4096, parent: 'entry-1-3', collapsed: false, focus: null },
+  { id: 'entry-1-3-2', text: 'entry-1-3-2', position: 4096 * 2, parent: 'entry-1-3', collapsed: false, focus: null },
+  { id: 'entry-1-3-3', text: 'entry-1-3-3', position: 4096 * 3, parent: 'entry-1-3', collapsed: false, focus: null },
+  {
+    id: 'entry-1-3-3-1',
+    text: '*Hello!* I am `doing super` well ~how~ are **you**?',
+    position: 4096 * 1,
+    parent: 'entry-1-3-3',
+    collapsed: false,
+    focus: null,
+  },
+  {
+    id: 'entry-1-3-3-1-1',
+    text: 'entry-1-3-3-1-1',
+    position: 4096 * 1,
+    parent: 'entry-1-3-3-1',
+    collapsed: false,
+    focus: null,
+  },
+  { id: 'entry-2', text: 'entry-2', position: 4096 * 2, parent: 'root', collapsed: false, focus: null },
+  { id: 'entry-3', text: 'entry-3', position: 4096 * 3, parent: 'root', collapsed: false, focus: null },
+  { id: 'entry-4', text: 'entry-4', position: 4096 * 4, parent: 'root', collapsed: false, focus: null },
+  { id: 'entry-5', text: 'entry-5', position: 4096 * 5, parent: 'root', collapsed: false, focus: null },
+  ...generateItems(100),
+];
+
+const Outline: React.FC = () => {
+  const [items, setItems] = useState(listItems);
+  const [selecting, setSelecting] = useState<{
+    isSelecting: boolean;
+    node: { id: string; depth: number } | null;
+  }>({ isSelecting: false, node: null });
+  const [selection, setSelection] = useState<null | { nodes: Array<{ id: string }>; first?: OutlineNode | null }>(null);
+  const [dragging, setDragging] = useState<{
+    show: boolean;
+    draggedNodes: null | Array<string>;
+    initialPos: { x: number; y: number };
+  }>({ show: false, draggedNodes: null, initialPos: { x: 0, y: 0 } });
+  const [impact, setImpact] = useState<null | {
+    listPosition: number;
+    zone: ImpactZone;
+    depthTarget: number;
+  }>(null);
+  const selectRef = useRef<{ isSelecting: boolean; hasSelection: boolean; node: { id: string; depth: number } | null }>(
+    {
+      isSelecting: false,
+      node: null,
+      hasSelection: false,
+    },
+  );
+  const impactRef = useRef<null | { listPosition: number; depth: number; zone: ImpactZone }>(null);
+  useEffect(() => {
+    if (impact) {
+      impactRef.current = { zone: impact.zone, depth: impact.depthTarget, listPosition: impact.listPosition };
+    }
+  }, [impact]);
+  useEffect(() => {
+    selectRef.current.isSelecting = selecting.isSelecting;
+    selectRef.current.node = selecting.node;
+  }, [selecting]);
+
+  const $content = useRef<HTMLDivElement>(null);
+  const outline = useRef<OutlineData>({
+    published: new Map<string, string>(),
+    dimensions: new Map<string, NodeDimensions>(),
+    nodes: new Map<number, Map<string, OutlineNode>>(),
+    relationships: new Map<string, NodeRelationships>(),
+  });
+
+  const tree = transformToTree(_.cloneDeep(items));
+  let root: any = null;
+  if (tree.length === 1) {
+    root = tree[0];
+  }
+  const outlineHistory = useRef<{ commands: Array<OutlineCommand>; current: number }>({ current: -1, commands: [] });
+
+  useEffect(() => {
+    outline.current.relationships = new Map<string, NodeRelationships>();
+    outline.current.published = new Map<string, string>();
+    outline.current.nodes = new Map<number, Map<string, OutlineNode>>();
+    const collapsedMap = items.reduce((map, next) => {
+      if (next.collapsed) {
+        map.set(next.id, true);
+      }
+      return map;
+    }, new Map<string, boolean>());
+    items.forEach(item => outline.current.published.set(item.id, item.parent ?? 'root'));
+
+    for (let i = 0; i < items.length; i++) {
+      const { collapsed, position, id, parent: curParent } = items[i];
+      if (id === 'root') {
+        continue;
+      }
+      const parent = curParent ?? 'root';
+      outline.current.published.set(id, parent ?? 'root');
+      const foundDepth = findNodeDepth(outline.current.published, id);
+      if (foundDepth === null) {
+        continue;
+      }
+      const { depth, ancestors } = foundDepth;
+      const collapsedParent = ancestors.slice(0, -1).find(a => collapsedMap.get(a));
+      if (collapsedParent) {
+        continue;
+      }
+      const children = getNumberOfChildren(root, ancestors);
+      if (!outline.current.nodes.has(depth)) {
+        outline.current.nodes.set(depth, new Map<string, OutlineNode>());
+      }
+      const targetDepthNodes = outline.current.nodes.get(depth);
+      if (targetDepthNodes) {
+        targetDepthNodes.set(id, {
+          id,
+          children,
+          position,
+          depth,
+          ancestors,
+          collapsed,
+          parent,
+        });
+      }
+      if (!outline.current.relationships.has(parent)) {
+        outline.current.relationships.set(parent, {
+          self: {
+            depth: depth - 1,
+            id: parent,
+          },
+          children: [],
+          numberOfSubChildren: 0,
+        });
+      }
+      const nodeRelations = outline.current.relationships.get(parent);
+      if (nodeRelations) {
+        outline.current.relationships.set(parent, {
+          self: nodeRelations.self,
+          numberOfSubChildren: nodeRelations.numberOfSubChildren + children,
+          children: [...nodeRelations.children, { id, position, depth, children }].sort(
+            (a, b) => a.position - b.position,
+          ),
+        });
+      }
+    }
+  }, [items]);
+  const handleKeyDown = useCallback(e => {
+    if (e.code === 'KeyZ' && e.ctrlKey) {
+      const currentCommand = outlineHistory.current.commands[outlineHistory.current.current];
+      if (currentCommand) {
+        setItems(prevItems =>
+          produce(prevItems, draftItems => {
+            currentCommand.nodes.forEach(node => {
+              const idx = prevItems.findIndex(c => c.id === node.id);
+              if (node.type === CommandType.MOVE) {
+                if (idx === -1) return;
+                const data = node.data as MoveData;
+                draftItems[idx].parent = data.prev.parent;
+                draftItems[idx].position = data.prev.position;
+              } else if (node.type === CommandType.CHANGE_TEXT) {
+                if (idx === -1) return;
+                const data = node.data as ChangeTextData;
+                draftItems[idx] = produce(prevItems[idx], draftItem => {
+                  draftItem.text = data.prev;
+                  draftItem.focus = { caret: data.caret };
+                });
+              } else if (node.type === CommandType.DELETE) {
+                const data = node.data as DeleteData;
+                draftItems.push({
+                  id: data.node.id,
+                  position: data.node.position,
+                  parent: data.node.parentID,
+                  text: '',
+                  focus: { caret: null },
+                  children: [],
+                  collapsed: false,
+                });
+              }
+            });
+            outlineHistory.current.current--;
+          }),
+        );
+      }
+    } else if (e.code === 'KeyY' && e.ctrlKey) {
+      const currentCommand = outlineHistory.current.commands[outlineHistory.current.current + 1];
+      if (currentCommand) {
+        setItems(prevItems =>
+          produce(prevItems, draftItems => {
+            currentCommand.nodes.forEach(node => {
+              const idx = prevItems.findIndex(c => c.id === node.id);
+              if (idx !== -1) {
+                if (node.type === CommandType.MOVE) {
+                  const data = node.data as MoveData;
+                  draftItems[idx].parent = data.next.parent;
+                  draftItems[idx].position = data.next.position;
+                }
+              }
+            });
+            outlineHistory.current.current++;
+          }),
+        );
+      }
+    }
+  }, []);
+
+  const handleMouseUp = useCallback(
+    e => {
+      if (selectRef.current.hasSelection && !selectRef.current.isSelecting) {
+        setSelection(null);
+      }
+      if (selectRef.current.isSelecting) {
+        setSelecting({ isSelecting: false, node: null });
+      }
+    },
+    [dragging, selecting],
+  );
+  const handleMouseMove = useCallback(e => {
+    if (selectRef.current.isSelecting && selectRef.current.node) {
+      const { clientX, clientY } = e;
+      const dimensions = outline.current.dimensions.get(selectRef.current.node.id);
+      if (dimensions) {
+        const entry = getDimensions(dimensions.entry);
+        if (entry) {
+          const isAbove = clientY < entry.top;
+          const isBelow = clientY > entry.bottom;
+          if (!isAbove && !isBelow && selectRef.current.hasSelection) {
+            const nodeDepth = outline.current.nodes.get(selectRef.current.node.depth);
+            const aboveNode = nodeDepth ? nodeDepth.get(selectRef.current.node.id) : null;
+            if (aboveNode) {
+              setSelection({ nodes: [{ id: selectRef.current.node.id }], first: aboveNode });
+              selectRef.current.hasSelection = false;
+            }
+          }
+          if (isAbove || isBelow) {
+            e.preventDefault();
+            const { curDraggable } = getNodeOver({ x: clientX, y: clientY }, outline.current);
+            const nodeDepth = outline.current.nodes.get(selectRef.current.node.depth);
+            const selectedNode = nodeDepth ? nodeDepth.get(selectRef.current.node.id) : null;
+            let aboveNode: OutlineNode | undefined | null = null;
+            let belowNode: OutlineNode | undefined | null = null;
+            if (isBelow) {
+              aboveNode = selectedNode;
+              belowNode = curDraggable;
+            } else {
+              aboveNode = curDraggable;
+              belowNode = selectedNode;
+            }
+            if (aboveNode && belowNode) {
+              const aboveDim = outline.current.dimensions.get(aboveNode.id);
+              const belowDim = outline.current.dimensions.get(belowNode.id);
+              if (aboveDim && belowDim) {
+                const aboveDimBounds = getDimensions(aboveDim.entry);
+                const belowDimBounds = getDimensions(belowDim.children ? belowDim.children : belowDim.entry);
+                const aboveDimY = aboveDimBounds ? aboveDimBounds.bottom : 0;
+                const belowDimY = belowDimBounds ? belowDimBounds.top : 0;
+                const inbetweenNodes: Array<{ id: string }> = [];
+                for (const [id, dimension] of outline.current.dimensions.entries()) {
+                  if (id === aboveNode.id || id === belowNode.id) {
+                    inbetweenNodes.push({ id });
+                    continue;
+                  }
+                  const targetNodeBounds = getDimensions(dimension.entry);
+                  if (targetNodeBounds) {
+                    if (
+                      Math.round(aboveDimY) <= Math.round(targetNodeBounds.top) &&
+                      Math.round(belowDimY) >= Math.round(targetNodeBounds.bottom)
+                    ) {
+                      inbetweenNodes.push({ id });
+                    }
+                  }
+                }
+                const filteredNodes = inbetweenNodes.filter(n => {
+                  const parent = outline.current.published.get(n.id);
+                  if (parent) {
+                    const foundParent = inbetweenNodes.find(c => c.id === parent);
+                    if (foundParent) {
+                      return false;
+                    }
+                  }
+                  return true;
+                });
+                selectRef.current.hasSelection = true;
+                setSelection({ nodes: filteredNodes, first: aboveNode });
+              }
+            }
+          }
+        }
+      }
+    }
+  }, []);
+  useEffect(() => {
+    document.addEventListener('mouseup', handleMouseUp);
+    document.addEventListener('mousemove', handleMouseMove);
+    document.addEventListener('keydown', handleKeyDown);
+    return () => {
+      document.removeEventListener('mouseup', handleMouseUp);
+      document.removeEventListener('mousemove', handleMouseMove);
+      document.addEventListener('keydown', handleKeyDown);
+    };
+  }, []);
+
+  const $page = useRef<HTMLDivElement>(null);
+  const $pageName = useRef<HTMLDivElement>(null);
+  if (!root) {
+    return null;
+  }
+  return (
+    <>
+      <GlobalTopNavbar onSaveProjectName={NOOP} projectID={null} name={null} />
+      <DragContext.Provider
+        value={{
+          outline,
+          impact,
+          setImpact: data => {
+            if (data) {
+              const { zone, depth } = data;
+              let listPosition = 65535;
+              if (zone.above && zone.above.node.depth + 1 <= depth && zone.above.node.collapsed) {
+                const aboveChildren = items
+                  .filter(i => (zone.above ? i.parent === zone.above.node.id : false))
+                  .sort((a, b) => a.position - b.position);
+                const lastChild = aboveChildren[aboveChildren.length - 1];
+                if (lastChild) {
+                  listPosition = lastChild.position * 2.0;
+                }
+              } else {
+                const correctNode = getCorrectNode(outline.current, zone.above ? zone.above.node : null, depth);
+                const listAbove = validateDepth(correctNode, depth);
+                const listBelow = validateDepth(zone.below ? zone.below.node : null, depth);
+                if (listAbove && listBelow) {
+                  listPosition = (listAbove.position + listBelow.position) / 2.0;
+                } else if (listAbove && !listBelow) {
+                  listPosition = listAbove.position * 2.0;
+                } else if (!listAbove && listBelow) {
+                  listPosition = listBelow.position / 2.0;
+                }
+              }
+
+              if (!zone.above && zone.below) {
+                const newPosition = zone.below.node.position / 2.0;
+                setImpact(() => ({
+                  zone,
+                  listPosition: newPosition,
+                  depthTarget: depth,
+                }));
+              }
+              if (zone.above) {
+                // console.log(`prev=${prev} next=${next} targetPosition=${targetPosition}`);
+                // let targetID = depthTarget === 1 ? 'root' : node.ancestors[depthTarget - 1];
+                // targetID = targetID ?? node.id;
+                setImpact(() => ({
+                  zone,
+                  listPosition,
+                  depthTarget: depth,
+                }));
+              }
+            } else {
+              setImpact(null);
+            }
+          },
+          setNodeDimensions: (nodeID, ref) => {
+            outline.current.dimensions.set(nodeID, ref);
+          },
+          clearNodeDimensions: nodeID => {
+            outline.current.dimensions.delete(nodeID);
+          },
+        }}
+      >
+        <>
+          <PageContainer ref={$page}>
+            <PageContent>
+              <RootWrapper ref={$content}>
+                <PageName>
+                  <PageNameContent ref={$pageName}>
+                    <PageNameText>entry-1-3-1</PageNameText>
+                  </PageNameContent>
+                </PageName>
+                <Entry
+                  onDepthChange={(id, parentID, position, depth, depthDelta) => {
+                    if (depthDelta === -1) {
+                      const parentRelation = outline.current.relationships.get(parentID);
+                      if (parentRelation) {
+                        const nodeIdx = parentRelation.children
+                          .sort((a, b) => a.position - b.position)
+                          .findIndex(c => c.id === id);
+                        if (parentRelation.children.length !== 0) {
+                          const grandparent = outline.current.published.get(parentID);
+                          if (grandparent) {
+                            const grandparentNode = outline.current.relationships.get(grandparent);
+                            if (grandparentNode) {
+                              const parents = grandparentNode.children.sort((a, b) => a.position - b.position);
+                              const parentIdx = parents.findIndex(c => c.id === parentID);
+                              if (parentIdx === -1) return;
+                              let position = parents[parentIdx].position * 2;
+                              const nextParent = parents[parentIdx + 1];
+                              if (nextParent) {
+                                position = (parents[parentIdx].position + nextParent.position) / 2.0;
+                              }
+                              setItems(prevItems =>
+                                produce(prevItems, draftItems => {
+                                  const idx = prevItems.findIndex(c => c.id === id);
+                                  draftItems[idx] = produce(prevItems[idx], draftItem => {
+                                    draftItem.parent = grandparent;
+                                    draftItem.position = position;
+                                    draftItem.focus = { caret: 0 };
+                                  });
+                                }),
+                              );
+                            }
+                          }
+                        }
+                      }
+                    } else {
+                      const parent = outline.current.relationships.get(parentID);
+                      if (parent) {
+                        const nodeIdx = parent.children
+                          .sort((a, b) => a.position - b.position)
+                          .findIndex(c => c.id === id);
+                        const aboveNode = parent.children[nodeIdx - 1];
+                        if (aboveNode) {
+                          const aboveNodeRelations = outline.current.relationships.get(aboveNode.id);
+                          let position = 65535;
+                          if (aboveNodeRelations) {
+                            const children = aboveNodeRelations.children.sort((a, b) => a.position - b.position);
+                            if (children.length !== 0) {
+                              position = children[children.length - 1].position * 2;
+                            }
+                          }
+                          setItems(prevItems =>
+                            produce(prevItems, draftItems => {
+                              const idx = prevItems.findIndex(c => c.id === id);
+                              draftItems[idx] = produce(prevItems[idx], draftItem => {
+                                draftItem.parent = aboveNode.id;
+                                draftItem.position = position;
+                                draftItem.focus = { caret: 0 };
+                              });
+                            }),
+                          );
+                        }
+                      }
+                    }
+                  }}
+                  onTextChange={(id, prev, next, caret) => {
+                    outlineHistory.current.current += 1;
+                    const data: ChangeTextData = {
+                      node: {
+                        id,
+                        position: 0,
+                        parentID: '',
+                      },
+                      caret,
+                      prev,
+                      next,
+                    };
+                    const command: OutlineCommand = {
+                      nodes: [
+                        {
+                          id,
+                          type: CommandType.CHANGE_TEXT,
+                          data,
+                        },
+                      ],
+                    };
+                    outlineHistory.current.commands[outlineHistory.current.current] = command;
+                    if (outlineHistory.current.commands[outlineHistory.current.current + 1]) {
+                      outlineHistory.current.commands.splice(outlineHistory.current.current + 1);
+                    }
+                    setItems(prevItems =>
+                      produce(prevItems, draftItems => {
+                        const idx = prevItems.findIndex(c => c.id === id);
+                        if (idx !== -1) {
+                          draftItems[idx] = produce(prevItems[idx], draftItem => {
+                            draftItem.text = next;
+                          });
+                        }
+                      }),
+                    );
+                  }}
+                  text=""
+                  autoFocus={null}
+                  onDeleteEntry={(depth, id, text, caretPos) => {
+                    const nodeDepth = outline.current.nodes.get(depth);
+                    if (nodeDepth) {
+                      const node = nodeDepth.get(id);
+                      if (node) {
+                        const nodeAbove = findNodeAbove(outline.current, depth, node);
+                        setItems(prevItems => {
+                          return produce(prevItems, draftItems => {
+                            draftItems = prevItems.filter(c => c.id !== id);
+                            const idx = prevItems.findIndex(c => c.id === nodeAbove?.id);
+                            if (idx !== -1) {
+                              draftItems[idx] = produce(prevItems[idx], draftItem => {
+                                draftItem.focus = { caret: draftItem.text.length };
+                                const cType = CommandType.DELETE;
+                                const data: DeleteData = {
+                                  node: {
+                                    id,
+                                    position: node.position,
+                                    parentID: node.parent,
+                                    text: '',
+                                  },
+                                };
+                                if (text !== '') {
+                                  draftItem.text += text;
+                                }
+
+                                const command: OutlineCommand = {
+                                  nodes: [
+                                    {
+                                      id,
+                                      type: cType,
+                                      data,
+                                    },
+                                  ],
+                                };
+                                outlineHistory.current.current += 1;
+                                outlineHistory.current.commands[outlineHistory.current.current] = command;
+                                if (outlineHistory.current.commands[outlineHistory.current.current + 1]) {
+                                  outlineHistory.current.commands.splice(outlineHistory.current.current + 1);
+                                }
+                              });
+                            }
+                            return draftItems;
+                          });
+                        });
+                      }
+                    }
+                  }}
+                  onCreateEntry={(parent, position) => {
+                    setItems(prevItems =>
+                      produce(prevItems, draftItems => {
+                        draftItems.push({
+                          id: '' + Math.random(),
+                          collapsed: false,
+                          position,
+                          text: '',
+                          focus: {
+                            caret: null,
+                          },
+                          parent,
+                          children: [],
+                        });
+                      }),
+                    );
+                  }}
+                  onNodeFocused={id => {
+                    setItems(prevItems =>
+                      produce(prevItems, draftItems => {
+                        const idx = draftItems.findIndex(c => c.id === id);
+                        draftItems[idx] = produce(draftItems[idx], draftItem => {
+                          draftItem.focus = null;
+                        });
+                      }),
+                    );
+                  }}
+                  onStartSelect={({ id, depth }) => {
+                    setSelection(null);
+                    setSelecting({ isSelecting: true, node: { id, depth } });
+                  }}
+                  onToggleCollapse={(id, collapsed) => {
+                    setItems(prevItems =>
+                      produce(prevItems, draftItems => {
+                        const idx = prevItems.findIndex(c => c.id === id);
+                        if (idx !== -1) {
+                          draftItems[idx].collapsed = collapsed;
+                        }
+                      }),
+                    );
+                  }}
+                  id="root"
+                  parentID="root"
+                  isRoot
+                  selection={selection ? selection.nodes : null}
+                  draggedNodes={dragging.draggedNodes}
+                  position={root.position}
+                  entries={root.children}
+                  onCancelDrag={() => {
+                    setImpact(null);
+                    setDragging({ show: false, draggedNodes: null, initialPos: { x: 0, y: 0 } });
+                  }}
+                  onHandleClick={id => {}}
+                  onStartDrag={e => {
+                    if (e.id !== 'root') {
+                      if (selectRef.current.hasSelection && selection && selection.nodes.find(c => c.id === e.id)) {
+                        setImpact(null);
+                        setDragging({
+                          show: true,
+                          draggedNodes: [...selection.nodes.map(c => c.id)],
+                          initialPos: { x: e.clientX, y: e.clientY },
+                        });
+                      } else {
+                        setImpact(null);
+                        setDragging({ show: true, draggedNodes: [e.id], initialPos: { x: e.clientX, y: e.clientY } });
+                      }
+                    }
+                  }}
+                />
+              </RootWrapper>
+            </PageContent>
+          </PageContainer>
+          {dragging.show && dragging.draggedNodes && (
+            <Dragger
+              container={$content}
+              initialPos={dragging.initialPos}
+              pageRef={$page}
+              draggedNodes={{ nodes: dragging.draggedNodes, first: selection ? selection.first : null }}
+              isDragging={dragging.show}
+              onDragEnd={() => {
+                if (dragging.draggedNodes && impactRef.current) {
+                  const { zone, depth, listPosition } = impactRef.current;
+                  const noZone = !zone.above && !zone.below;
+                  if (!noZone) {
+                    let parentID = 'root';
+                    if (zone.above) {
+                      parentID = zone.above.node.ancestors[depth - 1];
+                    }
+                    let reparent = true;
+                    for (let i = 0; i < dragging.draggedNodes.length; i++) {
+                      const draggedID = dragging.draggedNodes[i];
+                      const prevItem = items.find(i => i.id === draggedID);
+                      if (prevItem && prevItem.position === listPosition && prevItem.parent === parentID) {
+                        reparent = false;
+                        break;
+                      }
+                    }
+                    // TODO: set reparent if list position changed but parent did not
+                    //
+
+                    if (reparent) {
+                      // UPDATE OUTLINE DATA AFTER NODE MOVE
+                      setItems(itemsPrev =>
+                        produce(itemsPrev, draftItems => {
+                          if (dragging.draggedNodes) {
+                            const command: OutlineCommand = { nodes: [] };
+                            outlineHistory.current.current += 1;
+                            dragging.draggedNodes.forEach(n => {
+                              const curDragging = itemsPrev.findIndex(i => i.id === n);
+                              command.nodes.push({
+                                id: n,
+                                type: CommandType.MOVE,
+                                data: {
+                                  prev: {
+                                    parent: draftItems[curDragging].parent,
+                                    position: draftItems[curDragging].position,
+                                  },
+                                  next: {
+                                    parent: parentID,
+                                    position: listPosition,
+                                  },
+                                },
+                              });
+                              draftItems[curDragging].parent = parentID;
+                              draftItems[curDragging].position = listPosition;
+                            });
+                            outlineHistory.current.commands[outlineHistory.current.current] = command;
+                            if (outlineHistory.current.commands[outlineHistory.current.current + 1]) {
+                              outlineHistory.current.commands.splice(outlineHistory.current.current + 1);
+                            }
+                          }
+                        }),
+                      );
+                    }
+                  }
+                }
+                setImpact(null);
+                setDragging({ show: false, draggedNodes: null, initialPos: { x: 0, y: 0 } });
+              }}
+            />
+          )}
+        </>
+      </DragContext.Provider>
+      {impact && <DragIndicator depthTarget={impact.depthTarget} container={$content} zone={impact.zone} />}
+      {impact && (
+        <DragDebug zone={impact.zone ?? null} draggedNodes={dragging.draggedNodes} depthTarget={impact.depthTarget} />
+      )}
+    </>
+  );
+};
+
+export default Outline;

frontend/src/Outline/useDrag.ts

@@ -0,0 +1,22 @@
+import React, { useContext } from 'react';
+
+type DragContextData = {
+  impact: null | { zone: ImpactZone; depthTarget: number };
+  outline: React.MutableRefObject<OutlineData>;
+  setNodeDimensions: (
+    nodeID: string,
+    ref: { entry: React.RefObject<HTMLElement>; children: React.RefObject<HTMLElement> | null },
+  ) => void;
+  clearNodeDimensions: (nodeID: string) => void;
+  setImpact: (data: ImpactData | null) => void;
+};
+
+export const DragContext = React.createContext<DragContextData | null>(null);
+
+export const useDrag = () => {
+  const ctx = useContext(DragContext);
+  if (ctx) {
+    return ctx;
+  }
+  throw new Error('context is null');
+};

frontend/src/Outline/utils.ts

@@ -0,0 +1,409 @@
+import _ from 'lodash';
+
+export function getCorrectNode(data: OutlineData, node: OutlineNode | null, depth: number) {
+  if (node) {
+    if (depth === node.depth) {
+      return node;
+    }
+    const parent = node.ancestors[depth];
+    if (parent) {
+      const parentNode = data.relationships.get(parent);
+      if (parentNode) {
+        const parentDepth = parentNode.self.depth;
+        const nodeDepth = data.nodes.get(parentDepth);
+        return nodeDepth ? nodeDepth.get(parent) : null;
+      }
+    }
+  }
+  return null;
+}
+export function validateDepth(node: OutlineNode | null | undefined, depth: number) {
+  if (node) {
+    return node.depth === depth ? node : null;
+  }
+  return null;
+}
+
+export function getNodeAbove(node: OutlineNode, startingParent: RelationshipChild, outline: OutlineData) {
+  let hasChildren = true;
+  let nodeAbove: null | RelationshipChild = null;
+  let aboveTargetID = startingParent.id;
+  while (hasChildren) {
+    const targetParent = outline.relationships.get(aboveTargetID);
+    if (targetParent) {
+      const parentNodes = outline.nodes.get(targetParent.self.depth);
+      const parentNode = parentNodes ? parentNodes.get(targetParent.self.id) : null;
+      if (targetParent.children.length === 0) {
+        if (parentNode) {
+          nodeAbove = {
+            id: parentNode.id,
+            depth: parentNode.depth,
+            position: parentNode.position,
+            children: parentNode.children,
+          };
+        }
+        hasChildren = false;
+        continue;
+      }
+      nodeAbove = targetParent.children[targetParent.children.length - 1];
+      if (targetParent.numberOfSubChildren === 0) {
+        hasChildren = false;
+      } else {
+        aboveTargetID = nodeAbove.id;
+      }
+    } else {
+      const target = outline.relationships.get(node.ancestors[0]);
+      if (target) {
+        const targetChild = target.children.find(i => i.id === aboveTargetID);
+        if (targetChild) {
+          nodeAbove = targetChild;
+        }
+        hasChildren = false;
+      }
+    }
+  }
+  return nodeAbove;
+}
+
+export function getBelowParent(node: OutlineNode, outline: OutlineData) {
+  const { relationships, nodes } = outline;
+  const parentDepth = nodes.get(node.depth - 1);
+  const parent = parentDepth ? parentDepth.get(node.parent) : null;
+  if (parent) {
+    const grandfather = relationships.get(parent.parent);
+    if (grandfather) {
+      const parentIndex = grandfather.children.findIndex(c => c.id === parent.id);
+      if (parentIndex !== -1) {
+        if (parentIndex === grandfather.children.length - 1) {
+          const root = relationships.get(node.ancestors[0]);
+          if (root) {
+            const ancestorIndex = root.children.findIndex(c => c.id === node.ancestors[1]);
+            if (ancestorIndex !== -1) {
+              const nextAncestor = root.children[ancestorIndex + 1];
+              if (nextAncestor) {
+                return nextAncestor;
+              }
+            }
+          }
+        } else {
+          const nextChild = grandfather.children[parentIndex + 1];
+          if (nextChild) {
+            return nextChild;
+          }
+        }
+      }
+    }
+  }
+  return null;
+}
+
+export function getDimensions(ref: React.RefObject<HTMLElement> | null | undefined) {
+  if (ref && ref.current) {
+    return ref.current.getBoundingClientRect();
+  }
+  return null;
+}
+
+export function getTargetDepth(mouseX: number, handleLeft: number, availableDepths: { min: number; max: number }) {
+  if (mouseX > handleLeft) {
+    return availableDepths.max;
+  }
+  let curDepth = availableDepths.max - 1;
+  for (let x = availableDepths.min; x < availableDepths.max; x++) {
+    const breakpoint = handleLeft - x * 35;
+    if (mouseX > breakpoint) {
+      return curDepth;
+    }
+    curDepth -= 1;
+  }
+
+  return availableDepths.min;
+}
+
+export function findNextDraggable(pos: { x: number; y: number }, outline: OutlineData, curDepth: number) {
+  let index = 0;
+  const currentDepthNodes = outline.nodes.get(curDepth);
+  let nodeAbove: null | RelationshipChild = null;
+  if (!currentDepthNodes) {
+    return null;
+  }
+  for (const [id, node] of currentDepthNodes) {
+    const dimensions = outline.dimensions.get(id);
+    const target = dimensions ? getDimensions(dimensions.entry) : null;
+    const children = dimensions ? getDimensions(dimensions.children) : null;
+    if (target) {
+      if (pos.y <= target.bottom && pos.y >= target.top) {
+        const middlePoint = target.top + target.height / 2;
+        const position: ImpactPosition = pos.y > middlePoint ? 'after' : 'before';
+        return {
+          found: true,
+          node,
+          position,
+        };
+      }
+    }
+    if (children) {
+      if (pos.y <= children.bottom && pos.y >= children.top) {
+        const position: ImpactPosition = 'after';
+        return { found: false, node, position };
+      }
+    }
+    index += 1;
+  }
+  return null;
+}
+
+export function transformToTree(arr: any) {
+  const nodes: any = {};
+  return arr.filter(function(obj: any) {
+    var id = obj['id'],
+      parentId = obj['parent'];
+
+    nodes[id] = _.defaults(obj, nodes[id], { children: [] });
+    parentId && (nodes[parentId] = nodes[parentId] || { children: [] })['children'].push(obj);
+
+    return !parentId;
+  });
+}
+
+export function findNode(parentID: string, nodeID: string, data: OutlineData) {
+  const nodeRelations = data.relationships.get(parentID);
+  if (nodeRelations) {
+    const nodeDepth = data.nodes.get(nodeRelations.self.depth + 1);
+    if (nodeDepth) {
+      const node = nodeDepth.get(nodeID);
+      return node ?? null;
+    }
+  }
+  return null;
+}
+
+export function findNodeDepth(published: Map<string, string>, id: string) {
+  let currentID = id;
+  let breaker = 0;
+  let depth = 0;
+  let ancestors = [id];
+  while (currentID !== 'root') {
+    const nextID = published.get(currentID);
+    if (nextID) {
+      ancestors = [nextID, ...ancestors];
+      currentID = nextID;
+      depth += 1;
+      breaker += 1;
+      if (breaker > 100) {
+        throw new Error('node depth breaker was thrown');
+      }
+    } else {
+      return null;
+    }
+  }
+  return { depth, ancestors };
+}
+
+export function getNumberOfChildren(root: ItemElement, ancestors: Array<string>) {
+  let currentBranch = root;
+  for (let i = 1; i < ancestors.length; i++) {
+    const nextBranch = currentBranch.children ? currentBranch.children.find(c => c.id === ancestors[i]) : null;
+    if (nextBranch) {
+      currentBranch = nextBranch;
+    } else {
+      throw new Error('unable to find next branch');
+    }
+  }
+  return currentBranch.children ? currentBranch.children.length : 0;
+}
+
+export function findNodeAbove(outline: OutlineData, curDepth: number, belowNode: OutlineNode) {
+  let targetAboveNode: null | RelationshipChild = null;
+  if (curDepth === 1) {
+    const relations = outline.relationships.get(belowNode.ancestors[0]);
+    if (relations) {
+      const parentIndex = relations.children.findIndex(n => belowNode && n.id === belowNode.ancestors[1]);
+      if (parentIndex !== -1) {
+        const aboveParent = relations.children[parentIndex - 1];
+        if (parentIndex === 0) {
+          targetAboveNode = null;
+        } else {
+          targetAboveNode = getNodeAbove(belowNode, aboveParent, outline);
+        }
+      }
+    }
+  } else {
+    const relations = outline.relationships.get(belowNode.parent);
+    if (relations) {
+      const currentIndex = relations.children.findIndex(n => belowNode && n.id === belowNode.id);
+      // is first child, so use parent
+      if (currentIndex === 0) {
+        const parentNodes = outline.nodes.get(belowNode.depth - 1);
+        const parentNode = parentNodes ? parentNodes.get(belowNode.parent) : null;
+        if (parentNode) {
+          targetAboveNode = {
+            id: belowNode.parent,
+            depth: belowNode.depth - 1,
+            position: parentNode.position,
+            children: parentNode.children,
+          };
+        }
+      } else if (currentIndex !== -1) {
+        // is not first child, so first prev sibling
+        const aboveParentNode = relations.children[currentIndex - 1];
+        if (aboveParentNode) {
+          targetAboveNode = getNodeAbove(belowNode, aboveParentNode, outline);
+          if (targetAboveNode === null) {
+            targetAboveNode = aboveParentNode;
+          }
+        }
+      }
+    }
+  }
+  if (targetAboveNode) {
+    const depthNodes = outline.nodes.get(targetAboveNode.depth);
+    if (depthNodes) {
+      return depthNodes.get(targetAboveNode.id) ?? null;
+    }
+  }
+  return null;
+}
+
+export function getNodeOver(mouse: { x: number; y: number }, outline: OutlineData) {
+  let curDepth = 1;
+  let curDraggables: any;
+  let curDraggable: any;
+  let curPosition: ImpactPosition = 'after';
+  while (outline.nodes.size + 1 > curDepth) {
+    curDraggables = outline.nodes.get(curDepth);
+    if (curDraggables) {
+      const nextDraggable = findNextDraggable(mouse, outline, curDepth);
+      if (nextDraggable) {
+        curDraggable = nextDraggable.node;
+        curPosition = nextDraggable.position;
+        if (nextDraggable.found) {
+          break;
+        }
+        curDepth += 1;
+      } else {
+        break;
+      }
+    }
+  }
+  return {
+    curDepth,
+    curDraggable,
+    curPosition,
+  };
+}
+
+export function findCommonParent(outline: OutlineData, aboveNode: OutlineNode, belowNode: OutlineNode) {
+  let aboveParentID = null;
+  let depth = 0;
+  for (let aIdx = aboveNode.ancestors.length - 1; aIdx !== 0; aIdx--) {
+    depth = aIdx;
+    const aboveNodeParent = aboveNode.ancestors[aIdx];
+    for (let bIdx = belowNode.ancestors.length - 1; bIdx !== 0; bIdx--) {
+      if (belowNode.ancestors[bIdx] === aboveNodeParent) {
+        aboveParentID = aboveNodeParent;
+      }
+    }
+  }
+  if (aboveParentID) {
+    const parent = outline.relationships.get(aboveParentID) ?? null;
+    if (parent) {
+      return {
+        parent,
+        depth,
+      };
+    }
+    return null;
+  }
+  return null;
+}
+
+export function getLastChildInBranch(outline: OutlineData, lastParentNode: OutlineNode) {
+  let curParentRelation = outline.relationships.get(lastParentNode.id);
+  if (!curParentRelation) {
+    return { id: lastParentNode.id, depth: 1 };
+  }
+  let hasChildren = lastParentNode.children !== 0;
+  let depth = 1;
+  let finalID: null | string = null;
+  while (hasChildren) {
+    if (curParentRelation) {
+      const lastChild = curParentRelation.children.sort((a, b) => a.position - b.position)[
+        curParentRelation.children.length - 1
+      ];
+      depth += 1;
+      if (lastChild.children === 0) {
+        finalID = lastChild.id;
+        break;
+      }
+      curParentRelation = outline.relationships.get(lastChild.id);
+    } else {
+      hasChildren = false;
+    }
+  }
+  if (finalID !== null) {
+    return { id: finalID, depth };
+  }
+  return null;
+}
+
+export function getCaretPosition(editableDiv: any) {
+  /*
+  let caretPos = 0;
+  let sel: any = null;
+  let range: any = null;
+  if (window.getSelection) {
+    sel = window.getSelection();
+    if (sel && sel.rangeCount) {
+      range = sel.getRangeAt(0);
+      if (range.commonAncestorContainer.parentNode === editableDiv.current) {
+        caretPos = range.endOffset;
+      }
+    }
+  }
+  */
+  return editableDiv.selectionEnd;
+}
+
+export function createRange(node: any, chars: any, range: any) {
+  if (!range) {
+    range = document.createRange();
+    range.selectNode(node);
+    range.setStart(node, 0);
+  }
+
+  if (chars.count === 0) {
+    range.setEnd(node, chars.count);
+  } else if (node && chars.count > 0) {
+    if (node.nodeType === Node.TEXT_NODE) {
+      if (node.textContent.length < chars.count) {
+        chars.count -= node.textContent.length;
+      } else {
+        range.setEnd(node, chars.count);
+        chars.count = 0;
+      }
+    } else {
+      for (var lp = 0; lp < node.childNodes.length; lp++) {
+        range = createRange(node.childNodes[lp], chars, range);
+
+        if (chars.count === 0) {
+          break;
+        }
+      }
+    }
+  }
+
+  return range;
+}
+
+export function setCurrentCursorPosition(element: any, chars: any) {
+  if (chars >= 0) {
+    const selection = window.getSelection();
+    const range = createRange(element, { count: chars }, false);
+    if (range && selection) {
+      range.collapse(false);
+      selection.removeAllRanges();
+      selection.addRange(range);
+    }
+  }
+}

frontend/src/Projects/Project/Board/index.tsx

@@ -280,7 +280,7 @@ const ProjectBoard: React.FC<ProjectBoardProps> = ({ projectID, onCardLabelClick
         cache =>
           produce(cache, draftCache => {
             draftCache.findProject.taskGroups = draftCache.findProject.taskGroups.filter(
-              (taskGroup: TaskGroup) => taskGroup.id !== deletedTaskGroupData.data.deleteTaskGroup.taskGroup.id,
+              (taskGroup: TaskGroup) => taskGroup.id !== deletedTaskGroupData.data?.deleteTaskGroup.taskGroup.id,
             );
           }),
         { projectID },
@@ -296,10 +296,12 @@ const ProjectBoard: React.FC<ProjectBoardProps> = ({ projectID, onCardLabelClick
         cache =>
           produce(cache, draftCache => {
             const { taskGroups } = cache.findProject;
-            const idx = taskGroups.findIndex(taskGroup => taskGroup.id === newTaskData.data.createTask.taskGroup.id);
+            const idx = taskGroups.findIndex(taskGroup => taskGroup.id === newTaskData.data?.createTask.taskGroup.id);
             if (idx !== -1) {
+              if (newTaskData.data) {
                 draftCache.findProject.taskGroups[idx].tasks.push({ ...newTaskData.data.createTask });
               }
+            }
           }),
         { projectID },
       );
@@ -313,7 +315,9 @@ const ProjectBoard: React.FC<ProjectBoardProps> = ({ projectID, onCardLabelClick
         FindProjectDocument,
         cache =>
           produce(cache, draftCache => {
+            if (newTaskGroupData.data) {
               draftCache.findProject.taskGroups.push({ ...newTaskGroupData.data.createTaskGroup, tasks: [] });
+            }
           }),
         { projectID },
       );
@@ -332,7 +336,7 @@ const ProjectBoard: React.FC<ProjectBoardProps> = ({ projectID, onCardLabelClick
         cache =>
           produce(cache, draftCache => {
             const idx = cache.findProject.taskGroups.findIndex(
-              t => t.id === resp.data.deleteTaskGroupTasks.taskGroupID,
+              t => t.id === resp.data?.deleteTaskGroupTasks.taskGroupID,
             );
             if (idx !== -1) {
               draftCache.findProject.taskGroups[idx].tasks = [];
@@ -348,7 +352,9 @@ const ProjectBoard: React.FC<ProjectBoardProps> = ({ projectID, onCardLabelClick
         FindProjectDocument,
         cache =>
           produce(cache, draftCache => {
+            if (resp.data) {
               draftCache.findProject.taskGroups.push(resp.data.duplicateTaskGroup.taskGroup);
+            }
           }),
         { projectID },
       );
@@ -364,21 +370,26 @@ const ProjectBoard: React.FC<ProjectBoardProps> = ({ projectID, onCardLabelClick
         FindProjectDocument,
         cache =>
           produce(cache, draftCache => {
+            if (newTask.data) {
               const { previousTaskGroupID, task } = newTask.data.updateTaskLocation;
               if (previousTaskGroupID !== task.taskGroup.id) {
                 const { taskGroups } = cache.findProject;
                 const oldTaskGroupIdx = taskGroups.findIndex((t: TaskGroup) => t.id === previousTaskGroupID);
                 const newTaskGroupIdx = taskGroups.findIndex((t: TaskGroup) => t.id === task.taskGroup.id);
                 if (oldTaskGroupIdx !== -1 && newTaskGroupIdx !== -1) {
+                  const previousTask = cache.findProject.taskGroups[oldTaskGroupIdx].tasks.find(t => t.id === task.id);
                   draftCache.findProject.taskGroups[oldTaskGroupIdx].tasks = taskGroups[oldTaskGroupIdx].tasks.filter(
                     (t: Task) => t.id !== task.id,
                   );
+                  if (previousTask) {
                     draftCache.findProject.taskGroups[newTaskGroupIdx].tasks = [
                       ...taskGroups[newTaskGroupIdx].tasks,
-                  { ...task },
+                      { ...previousTask },
                     ];
                   }
                 }
+              }
+            }
           }),
         { projectID },
       );

frontend/src/Projects/Project/Details/index.tsx

@@ -138,10 +138,11 @@ const Details: React.FC<DetailsProps> = ({
         FindTaskDocument,
         cache =>
           produce(cache, draftCache => {
-            const { prevChecklistID, checklistID, checklistItem } = response.data.updateTaskChecklistItemLocation;
-            if (checklistID !== prevChecklistID) {
+            if (response.data) {
+              const { prevChecklistID, taskChecklistID, checklistItem } = response.data.updateTaskChecklistItemLocation;
+              if (taskChecklistID !== prevChecklistID) {
                 const oldIdx = cache.findTask.checklists.findIndex(c => c.id === prevChecklistID);
-              const newIdx = cache.findTask.checklists.findIndex(c => c.id === checklistID);
+                const newIdx = cache.findTask.checklists.findIndex(c => c.id === taskChecklistID);
                 if (oldIdx > -1 && newIdx > -1) {
                   const item = cache.findTask.checklists[oldIdx].items.find(i => i.id === checklistItem.id);
                   if (item) {
@@ -151,11 +152,12 @@ const Details: React.FC<DetailsProps> = ({
                     draftCache.findTask.checklists[newIdx].items.push({
                       ...item,
                       position: checklistItem.position,
-                    taskChecklistID: checklistID,
+                      taskChecklistID: taskChecklistID,
                     });
                   }
                 }
               }
+            }
           }),
         { taskID },
       );
@@ -188,7 +190,7 @@ const Details: React.FC<DetailsProps> = ({
           produce(cache, draftCache => {
             const { checklists } = cache.findTask;
             draftCache.findTask.checklists = checklists.filter(
-              c => c.id !== deleteData.data.deleteTaskChecklist.taskChecklist.id,
+              c => c.id !== deleteData.data?.deleteTaskChecklist.taskChecklist.id,
             );
             const { complete, total } = calculateChecklistBadge(draftCache.findTask.checklists);
             draftCache.findTask.badges.checklist = {
@@ -212,8 +214,10 @@ const Details: React.FC<DetailsProps> = ({
         FindTaskDocument,
         cache =>
           produce(cache, draftCache => {
+            if (createData.data) {
               const item = createData.data.createTaskChecklist;
               draftCache.findTask.checklists.push({ ...item });
+            }
           }),
         { taskID },
       );
@@ -227,6 +231,7 @@ const Details: React.FC<DetailsProps> = ({
         FindTaskDocument,
         cache =>
           produce(cache, draftCache => {
+            if (deleteData.data) {
               const item = deleteData.data.deleteTaskChecklistItem.taskChecklistItem;
               const targetIdx = cache.findTask.checklists.findIndex(c => c.id === item.taskChecklistID);
               if (targetIdx > -1) {
@@ -240,6 +245,7 @@ const Details: React.FC<DetailsProps> = ({
                 complete,
                 total,
               };
+            }
           }),
         { taskID },
       );
@@ -252,6 +258,7 @@ const Details: React.FC<DetailsProps> = ({
         FindTaskDocument,
         cache =>
           produce(cache, draftCache => {
+            if (newTaskItem.data) {
               const item = newTaskItem.data.createTaskChecklistItem;
               const { checklists } = cache.findTask;
               const idx = checklists.findIndex(c => c.id === item.taskChecklistID);
@@ -264,12 +271,13 @@ const Details: React.FC<DetailsProps> = ({
                   total,
                 };
               }
+            }
           }),
         { taskID },
       );
     },
   });
-  const { loading, data, refetch } = useFindTaskQuery({ variables: { taskID } });
+  const { loading, data, refetch } = useFindTaskQuery({ variables: { taskID }, fetchPolicy: 'cache-and-network' });
   const [setTaskComplete] = useSetTaskCompleteMutation();
   const [updateTaskDueDate] = useUpdateTaskDueDateMutation({
     onCompleted: () => {

frontend/src/Projects/Project/LabelManagerEditor/index.tsx

@@ -36,7 +36,9 @@ const LabelManagerEditor: React.FC<LabelManagerEditorProps> = ({
         FindProjectDocument,
         cache =>
           produce(cache, draftCache => {
+            if (newLabelData.data) {
               draftCache.findProject.labels.push({ ...newLabelData.data.createProjectLabel });
+            }
           }),
         {
           projectID,
@@ -53,7 +55,7 @@ const LabelManagerEditor: React.FC<LabelManagerEditorProps> = ({
         cache =>
           produce(cache, draftCache => {
             draftCache.findProject.labels = cache.findProject.labels.filter(
-              label => label.id !== newLabelData.data.deleteProjectLabel.id,
+              label => label.id !== newLabelData.data?.deleteProjectLabel.id,
             );
           }),
         { projectID },

frontend/src/Projects/Project/index.tsx

@@ -32,7 +32,6 @@ import {
   FindProjectDocument,
   FindProjectQuery,
 } from 'shared/generated/graphql';
-
 import produce from 'immer';
 import UserContext, { useCurrentUser } from 'App/context';
 import Input from 'shared/components/Input';
@@ -423,14 +422,16 @@ const Project = () => {
         FindProjectDocument,
         cache =>
           produce(cache, draftCache => {
+            if (resp.data) {
               const taskGroupIdx = draftCache.findProject.taskGroups.findIndex(
-              tg => tg.tasks.findIndex(t => t.id === resp.data.deleteTask.taskID) !== -1,
+                tg => tg.tasks.findIndex(t => t.id === resp.data?.deleteTask.taskID) !== -1,
               );
 
               if (taskGroupIdx !== -1) {
                 draftCache.findProject.taskGroups[taskGroupIdx].tasks = cache.findProject.taskGroups[
                   taskGroupIdx
-              ].tasks.filter(t => t.id !== resp.data.deleteTask.taskID);
+                ].tasks.filter(t => t.id !== resp.data?.deleteTask.taskID);
+              }
             }
           }),
         { projectID },
@@ -450,7 +451,7 @@ const Project = () => {
         FindProjectDocument,
         cache =>
           produce(cache, draftCache => {
-            draftCache.findProject.name = newName.data.updateProjectName.name;
+            draftCache.findProject.name = newName.data?.updateProjectName.name ?? '';
           }),
         { projectID },
       );
@@ -464,6 +465,7 @@ const Project = () => {
         FindProjectDocument,
         cache =>
           produce(cache, draftCache => {
+            if (response.data) {
               draftCache.findProject.members = [
                 ...cache.findProject.members,
                 ...response.data.inviteProjectMembers.members,
@@ -472,6 +474,7 @@ const Project = () => {
                 ...cache.findProject.invitedMembers,
                 ...response.data.inviteProjectMembers.invitedMembers,
               ];
+            }
           }),
         { projectID },
       );
@@ -485,7 +488,7 @@ const Project = () => {
         cache =>
           produce(cache, draftCache => {
             draftCache.findProject.invitedMembers = cache.findProject.invitedMembers.filter(
-              m => m.email !== response.data.deleteInvitedProjectMember.invitedMember.email,
+              m => m.email !== response.data?.deleteInvitedProjectMember.invitedMember.email ?? '',
             );
           }),
         { projectID },
@@ -500,7 +503,7 @@ const Project = () => {
         cache =>
           produce(cache, draftCache => {
             draftCache.findProject.members = cache.findProject.members.filter(
-              m => m.id !== response.data.deleteProjectMember.member.id,
+              m => m.id !== response.data?.deleteProjectMember.member.id,
             );
           }),
         { projectID },

frontend/src/Projects/index.tsx

@@ -210,7 +210,9 @@ const Projects = () => {
     update: (client, newProject) => {
       updateApolloCache<GetProjectsQuery>(client, GetProjectsDocument, cache =>
         produce(cache, draftCache => {
+          if (newProject.data) {
             draftCache.projects.push({ ...newProject.data.createProject });
+          }
         }),
       );
     },
@@ -222,7 +224,9 @@ const Projects = () => {
     update: (client, createData) => {
       updateApolloCache<GetProjectsQuery>(client, GetProjectsDocument, cache =>
         produce(cache, draftCache => {
-          draftCache.teams.push({ ...createData.data.createTeam });
+          if (createData.data) {
+            draftCache.teams.push({ ...createData.data?.createTeam });
+          }
         }),
       );
     },

frontend/src/Teams/Members/index.tsx

@@ -430,11 +430,13 @@ const Members: React.FC<MembersProps> = ({ teamID }) => {
         GetTeamDocument,
         cache =>
           produce(cache, draftCache => {
+            if (response.data) {
               draftCache.findTeam.members.push({
                 ...response.data.createTeamMember.teamMember,
                 member: { __typename: 'MemberList', projects: [], teams: [] },
                 owned: { __typename: 'OwnedList', projects: [], teams: [] },
               });
+            }
           }),
         { teamID },
       );
@@ -459,7 +461,7 @@ const Members: React.FC<MembersProps> = ({ teamID }) => {
         cache =>
           produce(cache, draftCache => {
             draftCache.findTeam.members = cache.findTeam.members.filter(
-              member => member.id !== response.data.deleteTeamMember.userID,
+              member => member.id !== response.data?.deleteTeamMember.userID,
             );
           }),
         { teamID },

frontend/src/Teams/index.tsx

@@ -33,7 +33,7 @@ const Wrapper = styled.div`
 `;
 
 type TeamPopupProps = {
-  history: History<History.PoorMansUnknown>;
+  history: History<any>;
   name: string;
   teamID: string;
 };
@@ -44,9 +44,9 @@ export const TeamPopup: React.FC<TeamPopupProps> = ({ history, name, teamID }) =
     update: (client, deleteData) => {
       updateApolloCache<GetProjectsQuery>(client, GetProjectsDocument, cache =>
         produce(cache, draftCache => {
-          draftCache.teams = cache.teams.filter((team: any) => team.id !== deleteData.data.deleteTeam.team.id);
+          draftCache.teams = cache.teams.filter((team: any) => team.id !== deleteData.data?.deleteTeam.team.id);
           draftCache.projects = cache.projects.filter(
-            (project: any) => project.team.id !== deleteData.data.deleteTeam.team.id,
+            (project: any) => project.team.id !== deleteData.data?.deleteTeam.team.id,
           );
         }),
       );

frontend/src/shared/components/NewProject/index.tsx

@@ -263,7 +263,7 @@ const NewProject: React.FC<NewProjectProps> = ({ initialTeamID, teams, onClose,
                   onChange={(e: any) => {
                     setTeam(e.value);
                   }}
-                  value={options.filter(d => d.value === team)}
+                  value={options.find(d => d.value === team)}
                   styles={colourStyles}
                   classNamePrefix="teamSelect"
                   options={options}

frontend/src/shared/components/TaskDetails/ActivityMessage.tsx

@@ -0,0 +1,23 @@
+import React from 'react';
+import styled from 'styled-components';
+import { TaskActivityData, ActivityType } from 'shared/generated/graphql';
+
+type ActivityMessageProps = {
+  type: ActivityType;
+  data: Array<TaskActivityData>;
+};
+
+function getVariable(data: Array<TaskActivityData>, name: string) {
+  const target = data.find(d => d.name === name);
+  return target ? target.value : null;
+}
+
+const ActivityMessage: React.FC<ActivityMessageProps> = ({ type, data }) => {
+  switch (type) {
+    case ActivityType.TaskAdded:
+      return <>`added this task to ${getVariable(data, 'TaskGroup')}`</>;
+  }
+  return <h1>hello</h1>;
+};
+
+export default ActivityMessage;

frontend/src/shared/components/TaskDetails/Styles.ts

@@ -537,25 +537,26 @@ export const ActivityItem = styled.div`
   overflow-wrap: break-word;
   word-wrap: break-word;
   word-break: break-word;
+  display: flex;
 `;
 
 export const ActivityItemHeader = styled.div`
   display: flex;
+  flex-direction: column;
+  padding-left: 8px;
 `;
-export const ActivityItemHeaderUser = styled(TaskAssignee)`
-  margin-right: 4px;
-`;
+export const ActivityItemHeaderUser = styled(TaskAssignee)``;
 
 export const ActivityItemHeaderTitle = styled.div`
-  margin-left: 4px;
-  line-height: 18px;
   display: flex;
   align-items: center;
+  color: ${props => props.theme.colors.text.primary};
+  padding-bottom: 2px;
 `;
 
 export const ActivityItemHeaderTitleName = styled.span`
-  color: ${props => props.theme.colors.text.primary};
   font-weight: 500;
+  padding-right: 2px;
 `;
 
 export const ActivityItemTimestamp = styled.span<{ margin: number }>`

frontend/src/shared/components/TaskDetails/index.tsx

@@ -19,8 +19,12 @@ import styled from 'styled-components';
 import { DragDropContext, Droppable, Draggable } from 'react-beautiful-dnd';
 import dayjs from 'dayjs';
 
+import ActivityMessage from './ActivityMessage';
 import Task from 'shared/icons/Task';
 import {
+  ActivityItemHeader,
+  ActivityItemTimestamp,
+  ActivityItem,
   TaskDetailLabel,
   CommentContainer,
   MetaDetailContent,
@@ -67,9 +71,13 @@ import {
   CommentInnerWrapper,
   ActivitySection,
   TaskDetailsEditor,
+  ActivityItemHeaderUser,
+  ActivityItemHeaderTitle,
+  ActivityItemHeaderTitleName,
 } from './Styles';
 import Checklist, { ChecklistItem, ChecklistItems } from '../Checklist';
 import onDragEnd from './onDragEnd';
+import TaskAssignee from 'shared/components/TaskAssignee';
 
 const ChecklistContainer = styled.div``;
 
@@ -425,7 +433,36 @@ const TaskDetails: React.FC<TaskDetailsProps> = ({
           <TabBarSection>
             <TabBarItem>Activity</TabBarItem>
           </TabBarSection>
-          <ActivitySection />
+          <ActivitySection>
+            {task.activity &&
+              task.activity.map(activity => (
+                <ActivityItem>
+                  <ActivityItemHeaderUser
+                    size={32}
+                    member={{
+                      id: activity.causedBy.id,
+                      fullName: activity.causedBy.fullName,
+                      profileIcon: activity.causedBy.profileIcon
+                        ? activity.causedBy.profileIcon
+                        : {
+                            url: null,
+                            initials: activity.causedBy.fullName.charAt(0),
+                            bgColor: '#fff',
+                          },
+                    }}
+                  />
+                  <ActivityItemHeader>
+                    <ActivityItemHeaderTitle>
+                      <ActivityItemHeaderTitleName>{activity.causedBy.fullName}</ActivityItemHeaderTitleName>
+                      <ActivityMessage type={activity.type} data={activity.data} />
+                    </ActivityItemHeaderTitle>
+                    <ActivityItemTimestamp margin={0}>
+                      {dayjs(activity.createdAt).format('MMM D [at] h:mm A')}
+                    </ActivityItemTimestamp>
+                  </ActivityItemHeader>
+                </ActivityItem>
+              ))}
+          </ActivitySection>
         </InnerContentContainer>
         <CommentContainer>
           {me && (

frontend/src/shared/generated/graphql.tsx

@@ -168,6 +168,41 @@ export type TaskBadges = {
   checklist?: Maybe<ChecklistBadge>;
 };
 
+export type CausedBy = {
+   __typename?: 'CausedBy';
+  id: Scalars['ID'];
+  fullName: Scalars['String'];
+  profileIcon?: Maybe<ProfileIcon>;
+};
+
+export type TaskActivityData = {
+   __typename?: 'TaskActivityData';
+  name: Scalars['String'];
+  value: Scalars['String'];
+};
+
+export enum ActivityType {
+  TaskAdded = 'TASK_ADDED',
+  TaskMoved = 'TASK_MOVED',
+  TaskMarkedComplete = 'TASK_MARKED_COMPLETE',
+  TaskMarkedIncomplete = 'TASK_MARKED_INCOMPLETE',
+  TaskDueDateChanged = 'TASK_DUE_DATE_CHANGED',
+  TaskDueDateAdded = 'TASK_DUE_DATE_ADDED',
+  TaskDueDateRemoved = 'TASK_DUE_DATE_REMOVED',
+  TaskChecklistChanged = 'TASK_CHECKLIST_CHANGED',
+  TaskChecklistAdded = 'TASK_CHECKLIST_ADDED',
+  TaskChecklistRemoved = 'TASK_CHECKLIST_REMOVED'
+}
+
+export type TaskActivity = {
+   __typename?: 'TaskActivity';
+  id: Scalars['ID'];
+  type: ActivityType;
+  data: Array<TaskActivityData>;
+  causedBy: CausedBy;
+  createdAt: Scalars['Time'];
+};
+
 export type Task = {
    __typename?: 'Task';
   id: Scalars['ID'];
@@ -183,6 +218,7 @@ export type Task = {
   labels: Array<TaskLabel>;
   checklists: Array<TaskChecklist>;
   badges: TaskBadges;
+  activity: Array<TaskActivity>;
 };
 
 export type Organization = {
@@ -209,6 +245,11 @@ export type TaskChecklist = {
   items: Array<TaskChecklistItem>;
 };
 
+export enum ShareStatus {
+  Invited = 'INVITED',
+  Joined = 'JOINED'
+}
+
 export enum RoleLevel {
   Admin = 'ADMIN',
   Member = 'MEMBER'
@@ -1050,17 +1091,16 @@ export type DeleteInvitedUserAccountPayload = {
 };
 
 export type MemberSearchFilter = {
-  SearchFilter: Scalars['String'];
+  searchFilter: Scalars['String'];
   projectID?: Maybe<Scalars['UUID']>;
 };
 
 export type MemberSearchResult = {
    __typename?: 'MemberSearchResult';
   similarity: Scalars['Int'];
-  user: UserAccount;
-  confirmed: Scalars['Boolean'];
-  invited: Scalars['Boolean'];
-  joined: Scalars['Boolean'];
+  id: Scalars['String'];
+  user?: Maybe<UserAccount>;
+  status: ShareStatus;
 };
 
 export type UpdateUserInfoPayload = {
@@ -1344,7 +1384,21 @@ export type FindTaskQuery = (
     & { taskGroup: (
       { __typename?: 'TaskGroup' }
       & Pick<TaskGroup, 'id' | 'name'>
-    ), badges: (
+    ), activity: Array<(
+      { __typename?: 'TaskActivity' }
+      & Pick<TaskActivity, 'id' | 'type' | 'createdAt'>
+      & { causedBy: (
+        { __typename?: 'CausedBy' }
+        & Pick<CausedBy, 'id' | 'fullName'>
+        & { profileIcon?: Maybe<(
+          { __typename?: 'ProfileIcon' }
+          & Pick<ProfileIcon, 'initials' | 'bgColor' | 'url'>
+        )> }
+      ), data: Array<(
+        { __typename?: 'TaskActivityData' }
+        & Pick<TaskActivityData, 'name' | 'value'>
+      )> }
+    )>, badges: (
       { __typename?: 'TaskBadges' }
       & { checklist?: Maybe<(
         { __typename?: 'ChecklistBadge' }
@@ -2825,6 +2879,24 @@ export const FindTaskDocument = gql`
       id
       name
     }
+    activity {
+      id
+      type
+      causedBy {
+        id
+        fullName
+        profileIcon {
+          initials
+          bgColor
+          url
+        }
+      }
+      createdAt
+      data {
+        name
+        value
+      }
+    }
     badges {
       checklist {
         total

frontend/src/shared/graphql/findTask.graphqls

@@ -10,6 +10,24 @@ query findTask($taskID: UUID!) {
       id
       name
     }
+    activity {
+      id
+      type
+      causedBy {
+        id
+        fullName
+        profileIcon {
+          initials
+          bgColor
+          url
+        }
+      }
+      createdAt
+      data {
+        name
+        value
+      }
+    }
     badges {
       checklist {
         total

frontend/src/shared/utils/cache.ts

@@ -9,7 +9,7 @@ export function updateApolloCache<T>(
   update: UpdateCacheFn<T>,
   variables?: object,
 ) {
-  let queryArgs: DataProxy.Query<any>;
+  let queryArgs: DataProxy.Query<any, any>;
   if (variables) {
     queryArgs = {
       query: document,

frontend/src/taskcafe.d.ts

@@ -206,10 +206,14 @@ type ImpactAction = {
 type ItemElement = {
   id: string;
   parent: null | string;
+  text: string;
+  focus: null | { caret: number | null };
+  zooming?: { x: number; y: number };
   position: number;
   collapsed: boolean;
   children?: Array<ItemElement>;
 };
+
 type NodeDimensions = {
   entry: React.RefObject<HTMLElement>;
   children: React.RefObject<HTMLElement> | null;

frontend/src/types.d.ts

@@ -1,3 +1,10 @@
+type ProjectLabel = {
+  id: string;
+  createdDate: string;
+  name?: string | null;
+  labelColor: LabelColor;
+};
+
 type ProfileIcon = {
   url?: string | null;
   initials?: string | null;
@@ -56,6 +63,24 @@ type TaskBadges = {
   checklist?: ChecklistBadge | null;
 };
 
+type TaskActivityData = {
+  name: string;
+  value: string;
+};
+
+type CausedBy = {
+  id: string;
+  fullName: string;
+  profileIcon?: null | ProfileIcon;
+};
+type TaskActivity = {
+  id: string;
+  type: any;
+  data: Array<TaskActivityData>;
+  causedBy: CausedBy;
+  createdAt: string;
+};
+
 type Task = {
   id: string;
   taskGroup: InnerTaskGroup;
@@ -69,6 +94,7 @@ type Task = {
   description?: string | null;
   assigned?: Array<TaskUser>;
   checklists?: Array<TaskChecklist> | null;
+  activity?: Array<TaskActivity> | null;
 };
 
 type Project = {
@@ -89,10 +115,3 @@ type Team = {
   name: string;
   createdAt: string;
 };
-
-type ProjectLabel = {
-  id: string;
-  createdDate: string;
-  name?: string | null;
-  labelColor: LabelColor;
-};

internal/db/models.go

@@ -4,6 +4,7 @@ package db
 
 import (
 	"database/sql"
+	"encoding/json"
 	"time"
 
 	"github.com/google/uuid"
@@ -103,6 +104,22 @@ type Task struct {
 	CompletedAt sql.NullTime   `json:"completed_at"`
 }
 
+type TaskActivity struct {
+	TaskActivityID uuid.UUID       `json:"task_activity_id"`
+	Active         bool            `json:"active"`
+	TaskID         uuid.UUID       `json:"task_id"`
+	CreatedAt      time.Time       `json:"created_at"`
+	CausedBy       uuid.UUID       `json:"caused_by"`
+	ActivityTypeID int32           `json:"activity_type_id"`
+	Data           json.RawMessage `json:"data"`
+}
+
+type TaskActivityType struct {
+	TaskActivityTypeID int32  `json:"task_activity_type_id"`
+	Code               string `json:"code"`
+	Template           string `json:"template"`
+}
+
 type TaskAssigned struct {
 	TaskAssignedID uuid.UUID `json:"task_assigned_id"`
 	TaskID         uuid.UUID `json:"task_id"`

internal/db/querier.go

@@ -23,6 +23,7 @@ type Querier interface {
 	CreateRefreshToken(ctx context.Context, arg CreateRefreshTokenParams) (RefreshToken, error)
 	CreateSystemOption(ctx context.Context, arg CreateSystemOptionParams) (SystemOption, error)
 	CreateTask(ctx context.Context, arg CreateTaskParams) (Task, error)
+	CreateTaskActivity(ctx context.Context, arg CreateTaskActivityParams) (TaskActivity, error)
 	CreateTaskAll(ctx context.Context, arg CreateTaskAllParams) (Task, error)
 	CreateTaskAssigned(ctx context.Context, arg CreateTaskAssignedParams) (TaskAssigned, error)
 	CreateTaskChecklist(ctx context.Context, arg CreateTaskChecklistParams) (TaskChecklist, error)
@@ -55,6 +56,7 @@ type Querier interface {
 	DeleteTeamMember(ctx context.Context, arg DeleteTeamMemberParams) error
 	DeleteUserAccountByID(ctx context.Context, userID uuid.UUID) error
 	DeleteUserAccountInvitedForEmail(ctx context.Context, email string) error
+	GetActivityForTaskID(ctx context.Context, taskID uuid.UUID) ([]TaskActivity, error)
 	GetAllNotificationsForUserID(ctx context.Context, notifierID uuid.UUID) ([]Notification, error)
 	GetAllOrganizations(ctx context.Context) ([]Organization, error)
 	GetAllProjectsForTeam(ctx context.Context, teamID uuid.UUID) ([]Project, error)
@@ -74,6 +76,7 @@ type Querier interface {
 	GetInvitedUserByEmail(ctx context.Context, email string) (UserAccountInvited, error)
 	GetLabelColorByID(ctx context.Context, labelColorID uuid.UUID) (LabelColor, error)
 	GetLabelColors(ctx context.Context) ([]LabelColor, error)
+	GetLastMoveForTaskID(ctx context.Context, taskID uuid.UUID) (GetLastMoveForTaskIDRow, error)
 	GetMemberData(ctx context.Context, projectID uuid.UUID) ([]UserAccount, error)
 	GetMemberProjectIDsForUserID(ctx context.Context, userID uuid.UUID) ([]uuid.UUID, error)
 	GetMemberTeamIDsForUserID(ctx context.Context, userID uuid.UUID) ([]uuid.UUID, error)
@@ -113,6 +116,7 @@ type Querier interface {
 	GetTeamRolesForUserID(ctx context.Context, userID uuid.UUID) ([]GetTeamRolesForUserIDRow, error)
 	GetTeamsForOrganization(ctx context.Context, organizationID uuid.UUID) ([]Team, error)
 	GetTeamsForUserIDWhereAdmin(ctx context.Context, userID uuid.UUID) ([]Team, error)
+	GetTemplateForActivityID(ctx context.Context, taskActivityTypeID int32) (string, error)
 	GetUserAccountByEmail(ctx context.Context, email string) (UserAccount, error)
 	GetUserAccountByID(ctx context.Context, userID uuid.UUID) (UserAccount, error)
 	GetUserAccountByUsername(ctx context.Context, username string) (UserAccount, error)
@@ -120,6 +124,7 @@ type Querier interface {
 	HasActiveUser(ctx context.Context) (bool, error)
 	HasAnyUser(ctx context.Context) (bool, error)
 	SetFirstUserActive(ctx context.Context) (UserAccount, error)
+	SetInactiveLastMoveForTaskID(ctx context.Context, taskID uuid.UUID) error
 	SetTaskChecklistItemComplete(ctx context.Context, arg SetTaskChecklistItemCompleteParams) (TaskChecklistItem, error)
 	SetTaskComplete(ctx context.Context, arg SetTaskCompleteParams) (Task, error)
 	SetTaskGroupName(ctx context.Context, arg SetTaskGroupNameParams) (TaskGroup, error)

internal/db/query/task_activity.sql

@@ -0,0 +1,22 @@
+-- name: CreateTaskActivity :one
+INSERT INTO task_activity (task_id, caused_by, created_at, activity_type_id, data)
+  VALUES ($1, $2, $3, $4, $5) RETURNING *;
+
+-- name: GetActivityForTaskID :many
+SELECT * FROM task_activity WHERE task_id = $1 AND active = true;
+
+-- name: GetTemplateForActivityID :one
+SELECT template FROM task_activity_type WHERE task_activity_type_id = $1;
+
+-- name: GetLastMoveForTaskID :one
+SELECT active, created_at, data->>'CurTaskGroupID' AS cur_task_group_id, data->>'PrevTaskGroupID' AS prev_task_group_id FROM task_activity
+  WHERE task_id = $1 AND activity_type_id = 2 AND created_at >= NOW() - INTERVAL '5 minutes'
+ORDER BY created_at DESC LIMIT 1;
+
+-- name: SetInactiveLastMoveForTaskID :exec
+UPDATE task_activity SET active = false WHERE task_activity_id = (
+  SELECT task_activity_id FROM task_activity AS ta
+  WHERE ta.activity_type_id = 2 AND ta.task_id = $1
+  AND ta.created_at >= NOW() - INTERVAL '5 minutes'
+  ORDER BY created_at DESC LIMIT 1
+);

internal/db/task_activity.sql.go

@@ -0,0 +1,131 @@
+// Code generated by sqlc. DO NOT EDIT.
+// source: task_activity.sql
+
+package db
+
+import (
+	"context"
+	"encoding/json"
+	"time"
+
+	"github.com/google/uuid"
+)
+
+const createTaskActivity = `-- name: CreateTaskActivity :one
+INSERT INTO task_activity (task_id, caused_by, created_at, activity_type_id, data)
+  VALUES ($1, $2, $3, $4, $5) RETURNING task_activity_id, active, task_id, created_at, caused_by, activity_type_id, data
+`
+
+type CreateTaskActivityParams struct {
+	TaskID         uuid.UUID       `json:"task_id"`
+	CausedBy       uuid.UUID       `json:"caused_by"`
+	CreatedAt      time.Time       `json:"created_at"`
+	ActivityTypeID int32           `json:"activity_type_id"`
+	Data           json.RawMessage `json:"data"`
+}
+
+func (q *Queries) CreateTaskActivity(ctx context.Context, arg CreateTaskActivityParams) (TaskActivity, error) {
+	row := q.db.QueryRowContext(ctx, createTaskActivity,
+		arg.TaskID,
+		arg.CausedBy,
+		arg.CreatedAt,
+		arg.ActivityTypeID,
+		arg.Data,
+	)
+	var i TaskActivity
+	err := row.Scan(
+		&i.TaskActivityID,
+		&i.Active,
+		&i.TaskID,
+		&i.CreatedAt,
+		&i.CausedBy,
+		&i.ActivityTypeID,
+		&i.Data,
+	)
+	return i, err
+}
+
+const getActivityForTaskID = `-- name: GetActivityForTaskID :many
+SELECT task_activity_id, active, task_id, created_at, caused_by, activity_type_id, data FROM task_activity WHERE task_id = $1 AND active = true
+`
+
+func (q *Queries) GetActivityForTaskID(ctx context.Context, taskID uuid.UUID) ([]TaskActivity, error) {
+	rows, err := q.db.QueryContext(ctx, getActivityForTaskID, taskID)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	var items []TaskActivity
+	for rows.Next() {
+		var i TaskActivity
+		if err := rows.Scan(
+			&i.TaskActivityID,
+			&i.Active,
+			&i.TaskID,
+			&i.CreatedAt,
+			&i.CausedBy,
+			&i.ActivityTypeID,
+			&i.Data,
+		); err != nil {
+			return nil, err
+		}
+		items = append(items, i)
+	}
+	if err := rows.Close(); err != nil {
+		return nil, err
+	}
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+	return items, nil
+}
+
+const getLastMoveForTaskID = `-- name: GetLastMoveForTaskID :one
+SELECT active, created_at, data->>'CurTaskGroupID' AS cur_task_group_id, data->>'PrevTaskGroupID' AS prev_task_group_id FROM task_activity
+  WHERE task_id = $1 AND activity_type_id = 2 AND created_at >= NOW() - INTERVAL '5 minutes'
+ORDER BY created_at DESC LIMIT 1
+`
+
+type GetLastMoveForTaskIDRow struct {
+	Active          bool        `json:"active"`
+	CreatedAt       time.Time   `json:"created_at"`
+	CurTaskGroupID  interface{} `json:"cur_task_group_id"`
+	PrevTaskGroupID interface{} `json:"prev_task_group_id"`
+}
+
+func (q *Queries) GetLastMoveForTaskID(ctx context.Context, taskID uuid.UUID) (GetLastMoveForTaskIDRow, error) {
+	row := q.db.QueryRowContext(ctx, getLastMoveForTaskID, taskID)
+	var i GetLastMoveForTaskIDRow
+	err := row.Scan(
+		&i.Active,
+		&i.CreatedAt,
+		&i.CurTaskGroupID,
+		&i.PrevTaskGroupID,
+	)
+	return i, err
+}
+
+const getTemplateForActivityID = `-- name: GetTemplateForActivityID :one
+SELECT template FROM task_activity_type WHERE task_activity_type_id = $1
+`
+
+func (q *Queries) GetTemplateForActivityID(ctx context.Context, taskActivityTypeID int32) (string, error) {
+	row := q.db.QueryRowContext(ctx, getTemplateForActivityID, taskActivityTypeID)
+	var template string
+	err := row.Scan(&template)
+	return template, err
+}
+
+const setInactiveLastMoveForTaskID = `-- name: SetInactiveLastMoveForTaskID :exec
+UPDATE task_activity SET active = false WHERE task_activity_id = (
+  SELECT task_activity_id FROM task_activity AS ta
+  WHERE ta.activity_type_id = 2 AND ta.task_id = $1
+  AND ta.created_at >= NOW() - INTERVAL '5 minutes'
+  ORDER BY created_at DESC LIMIT 1
+)
+`
+
+func (q *Queries) SetInactiveLastMoveForTaskID(ctx context.Context, taskID uuid.UUID) error {
+	_, err := q.db.ExecContext(ctx, setInactiveLastMoveForTaskID, taskID)
+	return err
+}

internal/graph/generated.go

@@ -47,6 +47,7 @@ type ResolverRoot interface {
 	Query() QueryResolver
 	RefreshToken() RefreshTokenResolver
 	Task() TaskResolver
+	TaskActivity() TaskActivityResolver
 	TaskChecklist() TaskChecklistResolver
 	TaskChecklistItem() TaskChecklistItemResolver
 	TaskGroup() TaskGroupResolver
@@ -60,6 +61,12 @@ type DirectiveRoot struct {
 }
 
 type ComplexityRoot struct {
+	CausedBy struct {
+		FullName    func(childComplexity int) int
+		ID          func(childComplexity int) int
+		ProfileIcon func(childComplexity int) int
+	}
+
 	ChecklistBadge struct {
 		Complete func(childComplexity int) int
 		Total    func(childComplexity int) int
@@ -346,6 +353,7 @@ type ComplexityRoot struct {
 	}
 
 	Task struct {
+		Activity    func(childComplexity int) int
 		Assigned    func(childComplexity int) int
 		Badges      func(childComplexity int) int
 		Checklists  func(childComplexity int) int
@@ -361,6 +369,19 @@ type ComplexityRoot struct {
 		TaskGroup   func(childComplexity int) int
 	}
 
+	TaskActivity struct {
+		CausedBy  func(childComplexity int) int
+		CreatedAt func(childComplexity int) int
+		Data      func(childComplexity int) int
+		ID        func(childComplexity int) int
+		Type      func(childComplexity int) int
+	}
+
+	TaskActivityData struct {
+		Name  func(childComplexity int) int
+		Value func(childComplexity int) int
+	}
+
 	TaskBadges struct {
 		Checklist func(childComplexity int) int
 	}
@@ -583,6 +604,13 @@ type TaskResolver interface {
 	Labels(ctx context.Context, obj *db.Task) ([]db.TaskLabel, error)
 	Checklists(ctx context.Context, obj *db.Task) ([]db.TaskChecklist, error)
 	Badges(ctx context.Context, obj *db.Task) (*TaskBadges, error)
+	Activity(ctx context.Context, obj *db.Task) ([]db.TaskActivity, error)
+}
+type TaskActivityResolver interface {
+	ID(ctx context.Context, obj *db.TaskActivity) (uuid.UUID, error)
+	Type(ctx context.Context, obj *db.TaskActivity) (ActivityType, error)
+	Data(ctx context.Context, obj *db.TaskActivity) ([]TaskActivityData, error)
+	CausedBy(ctx context.Context, obj *db.TaskActivity) (*CausedBy, error)
 }
 type TaskChecklistResolver interface {
 	ID(ctx context.Context, obj *db.TaskChecklist) (uuid.UUID, error)
@@ -634,6 +662,27 @@ func (e *executableSchema) Complexity(typeName, field string, childComplexity in
 	_ = ec
 	switch typeName + "." + field {
 
+	case "CausedBy.fullName":
+		if e.complexity.CausedBy.FullName == nil {
+			break
+		}
+
+		return e.complexity.CausedBy.FullName(childComplexity), true
+
+	case "CausedBy.id":
+		if e.complexity.CausedBy.ID == nil {
+			break
+		}
+
+		return e.complexity.CausedBy.ID(childComplexity), true
+
+	case "CausedBy.profileIcon":
+		if e.complexity.CausedBy.ProfileIcon == nil {
+			break
+		}
+
+		return e.complexity.CausedBy.ProfileIcon(childComplexity), true
+
 	case "ChecklistBadge.complete":
 		if e.complexity.ChecklistBadge.Complete == nil {
 			break
@@ -2126,6 +2175,13 @@ func (e *executableSchema) Complexity(typeName, field string, childComplexity in
 
 		return e.complexity.SortTaskGroupPayload.Tasks(childComplexity), true
 
+	case "Task.activity":
+		if e.complexity.Task.Activity == nil {
+			break
+		}
+
+		return e.complexity.Task.Activity(childComplexity), true
+
 	case "Task.assigned":
 		if e.complexity.Task.Assigned == nil {
 			break
@@ -2217,6 +2273,55 @@ func (e *executableSchema) Complexity(typeName, field string, childComplexity in
 
 		return e.complexity.Task.TaskGroup(childComplexity), true
 
+	case "TaskActivity.causedBy":
+		if e.complexity.TaskActivity.CausedBy == nil {
+			break
+		}
+
+		return e.complexity.TaskActivity.CausedBy(childComplexity), true
+
+	case "TaskActivity.createdAt":
+		if e.complexity.TaskActivity.CreatedAt == nil {
+			break
+		}
+
+		return e.complexity.TaskActivity.CreatedAt(childComplexity), true
+
+	case "TaskActivity.data":
+		if e.complexity.TaskActivity.Data == nil {
+			break
+		}
+
+		return e.complexity.TaskActivity.Data(childComplexity), true
+
+	case "TaskActivity.id":
+		if e.complexity.TaskActivity.ID == nil {
+			break
+		}
+
+		return e.complexity.TaskActivity.ID(childComplexity), true
+
+	case "TaskActivity.type":
+		if e.complexity.TaskActivity.Type == nil {
+			break
+		}
+
+		return e.complexity.TaskActivity.Type(childComplexity), true
+
+	case "TaskActivityData.name":
+		if e.complexity.TaskActivityData.Name == nil {
+			break
+		}
+
+		return e.complexity.TaskActivityData.Name(childComplexity), true
+
+	case "TaskActivityData.value":
+		if e.complexity.TaskActivityData.Value == nil {
+			break
+		}
+
+		return e.complexity.TaskActivityData.Value(childComplexity), true
+
 	case "TaskBadges.checklist":
 		if e.complexity.TaskBadges.Checklist == nil {
 			break
@@ -2796,6 +2901,38 @@ type TaskBadges {
   checklist: ChecklistBadge
 }
 
+type CausedBy {
+  id: ID!
+  fullName: String!
+  profileIcon: ProfileIcon
+}
+
+type TaskActivityData {
+  name: String!
+  value: String!
+}
+
+enum ActivityType {
+  TASK_ADDED
+  TASK_MOVED
+  TASK_MARKED_COMPLETE
+  TASK_MARKED_INCOMPLETE
+  TASK_DUE_DATE_CHANGED
+  TASK_DUE_DATE_ADDED
+  TASK_DUE_DATE_REMOVED
+  TASK_CHECKLIST_CHANGED
+  TASK_CHECKLIST_ADDED
+  TASK_CHECKLIST_REMOVED
+}
+
+type TaskActivity {
+  id: ID!
+  type: ActivityType!
+  data: [TaskActivityData!]!
+  causedBy: CausedBy!
+  createdAt: Time!
+}
+
 type Task {
   id: ID!
   taskGroup: TaskGroup!
@@ -2810,6 +2947,7 @@ type Task {
   labels: [TaskLabel!]!
   checklists: [TaskChecklist!]!
   badges: TaskBadges!
+  activity: [TaskActivity!]!
 }
 
 type Organization {
@@ -4432,6 +4570,105 @@ func (ec *executionContext) field___Type_fields_args(ctx context.Context, rawArg
 
 // region    **************************** field.gotpl *****************************
 
+func (ec *executionContext) _CausedBy_id(ctx context.Context, field graphql.CollectedField, obj *CausedBy) (ret graphql.Marshaler) {
+	defer func() {
+		if r := recover(); r != nil {
+			ec.Error(ctx, ec.Recover(ctx, r))
+			ret = graphql.Null
+		}
+	}()
+	fc := &graphql.FieldContext{
+		Object:   "CausedBy",
+		Field:    field,
+		Args:     nil,
+		IsMethod: false,
+	}
+
+	ctx = graphql.WithFieldContext(ctx, fc)
+	resTmp, err := ec.ResolverMiddleware(ctx, func(rctx context.Context) (interface{}, error) {
+		ctx = rctx // use context from middleware stack in children
+		return obj.ID, nil
+	})
+	if err != nil {
+		ec.Error(ctx, err)
+		return graphql.Null
+	}
+	if resTmp == nil {
+		if !graphql.HasFieldError(ctx, fc) {
+			ec.Errorf(ctx, "must not be null")
+		}
+		return graphql.Null
+	}
+	res := resTmp.(uuid.UUID)
+	fc.Result = res
+	return ec.marshalNID2githubᚗcomᚋgoogleᚋuuidᚐUUID(ctx, field.Selections, res)
+}
+
+func (ec *executionContext) _CausedBy_fullName(ctx context.Context, field graphql.CollectedField, obj *CausedBy) (ret graphql.Marshaler) {
+	defer func() {
+		if r := recover(); r != nil {
+			ec.Error(ctx, ec.Recover(ctx, r))
+			ret = graphql.Null
+		}
+	}()
+	fc := &graphql.FieldContext{
+		Object:   "CausedBy",
+		Field:    field,
+		Args:     nil,
+		IsMethod: false,
+	}
+
+	ctx = graphql.WithFieldContext(ctx, fc)
+	resTmp, err := ec.ResolverMiddleware(ctx, func(rctx context.Context) (interface{}, error) {
+		ctx = rctx // use context from middleware stack in children
+		return obj.FullName, nil
+	})
+	if err != nil {
+		ec.Error(ctx, err)
+		return graphql.Null
+	}
+	if resTmp == nil {
+		if !graphql.HasFieldError(ctx, fc) {
+			ec.Errorf(ctx, "must not be null")
+		}
+		return graphql.Null
+	}
+	res := resTmp.(string)
+	fc.Result = res
+	return ec.marshalNString2string(ctx, field.Selections, res)
+}
+
+func (ec *executionContext) _CausedBy_profileIcon(ctx context.Context, field graphql.CollectedField, obj *CausedBy) (ret graphql.Marshaler) {
+	defer func() {
+		if r := recover(); r != nil {
+			ec.Error(ctx, ec.Recover(ctx, r))
+			ret = graphql.Null
+		}
+	}()
+	fc := &graphql.FieldContext{
+		Object:   "CausedBy",
+		Field:    field,
+		Args:     nil,
+		IsMethod: false,
+	}
+
+	ctx = graphql.WithFieldContext(ctx, fc)
+	resTmp, err := ec.ResolverMiddleware(ctx, func(rctx context.Context) (interface{}, error) {
+		ctx = rctx // use context from middleware stack in children
+		return obj.ProfileIcon, nil
+	})
+	if err != nil {
+		ec.Error(ctx, err)
+		return graphql.Null
+	}
+	if resTmp == nil {
+		return graphql.Null
+	}
+	res := resTmp.(*ProfileIcon)
+	fc.Result = res
+	return ec.marshalOProfileIcon2ᚖgithubᚗcomᚋjordanknottᚋtaskcafeᚋinternalᚋgraphᚐProfileIcon(ctx, field.Selections, res)
+}
+
 func (ec *executionContext) _ChecklistBadge_complete(ctx context.Context, field graphql.CollectedField, obj *ChecklistBadge) (ret graphql.Marshaler) {
 	defer func() {
 		if r := recover(); r != nil {
@@ -12775,6 +13012,278 @@ func (ec *executionContext) _Task_badges(ctx context.Context, field graphql.Coll
 	return ec.marshalNTaskBadges2ᚖgithubᚗcomᚋjordanknottᚋtaskcafeᚋinternalᚋgraphᚐTaskBadges(ctx, field.Selections, res)
 }
 
+func (ec *executionContext) _Task_activity(ctx context.Context, field graphql.CollectedField, obj *db.Task) (ret graphql.Marshaler) {
+	defer func() {
+		if r := recover(); r != nil {
+			ec.Error(ctx, ec.Recover(ctx, r))
+			ret = graphql.Null
+		}
+	}()
+	fc := &graphql.FieldContext{
+		Object:   "Task",
+		Field:    field,
+		Args:     nil,
+		IsMethod: true,
+	}
+
+	ctx = graphql.WithFieldContext(ctx, fc)
+	resTmp, err := ec.ResolverMiddleware(ctx, func(rctx context.Context) (interface{}, error) {
+		ctx = rctx // use context from middleware stack in children
+		return ec.resolvers.Task().Activity(rctx, obj)
+	})
+	if err != nil {
+		ec.Error(ctx, err)
+		return graphql.Null
+	}
+	if resTmp == nil {
+		if !graphql.HasFieldError(ctx, fc) {
+			ec.Errorf(ctx, "must not be null")
+		}
+		return graphql.Null
+	}
+	res := resTmp.([]db.TaskActivity)
+	fc.Result = res
+	return ec.marshalNTaskActivity2ᚕgithubᚗcomᚋjordanknottᚋtaskcafeᚋinternalᚋdbᚐTaskActivityᚄ(ctx, field.Selections, res)
+}
+
+func (ec *executionContext) _TaskActivity_id(ctx context.Context, field graphql.CollectedField, obj *db.TaskActivity) (ret graphql.Marshaler) {
+	defer func() {
+		if r := recover(); r != nil {
+			ec.Error(ctx, ec.Recover(ctx, r))
+			ret = graphql.Null
+		}
+	}()
+	fc := &graphql.FieldContext{
+		Object:   "TaskActivity",
+		Field:    field,
+		Args:     nil,
+		IsMethod: true,
+	}
+
+	ctx = graphql.WithFieldContext(ctx, fc)
+	resTmp, err := ec.ResolverMiddleware(ctx, func(rctx context.Context) (interface{}, error) {
+		ctx = rctx // use context from middleware stack in children
+		return ec.resolvers.TaskActivity().ID(rctx, obj)
+	})
+	if err != nil {
+		ec.Error(ctx, err)
+		return graphql.Null
+	}
+	if resTmp == nil {
+		if !graphql.HasFieldError(ctx, fc) {
+			ec.Errorf(ctx, "must not be null")
+		}
+		return graphql.Null
+	}
+	res := resTmp.(uuid.UUID)
+	fc.Result = res
+	return ec.marshalNID2githubᚗcomᚋgoogleᚋuuidᚐUUID(ctx, field.Selections, res)
+}
+
+func (ec *executionContext) _TaskActivity_type(ctx context.Context, field graphql.CollectedField, obj *db.TaskActivity) (ret graphql.Marshaler) {
+	defer func() {
+		if r := recover(); r != nil {
+			ec.Error(ctx, ec.Recover(ctx, r))
+			ret = graphql.Null
+		}
+	}()
+	fc := &graphql.FieldContext{
+		Object:   "TaskActivity",
+		Field:    field,
+		Args:     nil,
+		IsMethod: true,
+	}
+
+	ctx = graphql.WithFieldContext(ctx, fc)
+	resTmp, err := ec.ResolverMiddleware(ctx, func(rctx context.Context) (interface{}, error) {
+		ctx = rctx // use context from middleware stack in children
+		return ec.resolvers.TaskActivity().Type(rctx, obj)
+	})
+	if err != nil {
+		ec.Error(ctx, err)
+		return graphql.Null
+	}
+	if resTmp == nil {
+		if !graphql.HasFieldError(ctx, fc) {
+			ec.Errorf(ctx, "must not be null")
+		}
+		return graphql.Null
+	}
+	res := resTmp.(ActivityType)
+	fc.Result = res
+	return ec.marshalNActivityType2githubᚗcomᚋjordanknottᚋtaskcafeᚋinternalᚋgraphᚐActivityType(ctx, field.Selections, res)
+}
+
+func (ec *executionContext) _TaskActivity_data(ctx context.Context, field graphql.CollectedField, obj *db.TaskActivity) (ret graphql.Marshaler) {
+	defer func() {
+		if r := recover(); r != nil {
+			ec.Error(ctx, ec.Recover(ctx, r))
+			ret = graphql.Null
+		}
+	}()
+	fc := &graphql.FieldContext{
+		Object:   "TaskActivity",
+		Field:    field,
+		Args:     nil,
+		IsMethod: true,
+	}
+
+	ctx = graphql.WithFieldContext(ctx, fc)
+	resTmp, err := ec.ResolverMiddleware(ctx, func(rctx context.Context) (interface{}, error) {
+		ctx = rctx // use context from middleware stack in children
+		return ec.resolvers.TaskActivity().Data(rctx, obj)
+	})
+	if err != nil {
+		ec.Error(ctx, err)
+		return graphql.Null
+	}
+	if resTmp == nil {
+		if !graphql.HasFieldError(ctx, fc) {
+			ec.Errorf(ctx, "must not be null")
+		}
+		return graphql.Null
+	}
+	res := resTmp.([]TaskActivityData)
+	fc.Result = res
+	return ec.marshalNTaskActivityData2ᚕgithubᚗcomᚋjordanknottᚋtaskcafeᚋinternalᚋgraphᚐTaskActivityDataᚄ(ctx, field.Selections, res)
+}
+
+func (ec *executionContext) _TaskActivity_causedBy(ctx context.Context, field graphql.CollectedField, obj *db.TaskActivity) (ret graphql.Marshaler) {
+	defer func() {
+		if r := recover(); r != nil {
+			ec.Error(ctx, ec.Recover(ctx, r))
+			ret = graphql.Null
+		}
+	}()
+	fc := &graphql.FieldContext{
+		Object:   "TaskActivity",
+		Field:    field,
+		Args:     nil,
+		IsMethod: true,
+	}
+
+	ctx = graphql.WithFieldContext(ctx, fc)
+	resTmp, err := ec.ResolverMiddleware(ctx, func(rctx context.Context) (interface{}, error) {
+		ctx = rctx // use context from middleware stack in children
+		return ec.resolvers.TaskActivity().CausedBy(rctx, obj)
+	})
+	if err != nil {
+		ec.Error(ctx, err)
+		return graphql.Null
+	}
+	if resTmp == nil {
+		if !graphql.HasFieldError(ctx, fc) {
+			ec.Errorf(ctx, "must not be null")
+		}
+		return graphql.Null
+	}
+	res := resTmp.(*CausedBy)
+	fc.Result = res
+	return ec.marshalNCausedBy2ᚖgithubᚗcomᚋjordanknottᚋtaskcafeᚋinternalᚋgraphᚐCausedBy(ctx, field.Selections, res)
+}
+
+func (ec *executionContext) _TaskActivity_createdAt(ctx context.Context, field graphql.CollectedField, obj *db.TaskActivity) (ret graphql.Marshaler) {
+	defer func() {
+		if r := recover(); r != nil {
+			ec.Error(ctx, ec.Recover(ctx, r))
+			ret = graphql.Null
+		}
+	}()
+	fc := &graphql.FieldContext{
+		Object:   "TaskActivity",
+		Field:    field,
+		Args:     nil,
+		IsMethod: false,
+	}
+
+	ctx = graphql.WithFieldContext(ctx, fc)
+	resTmp, err := ec.ResolverMiddleware(ctx, func(rctx context.Context) (interface{}, error) {
+		ctx = rctx // use context from middleware stack in children
+		return obj.CreatedAt, nil
+	})
+	if err != nil {
+		ec.Error(ctx, err)
+		return graphql.Null
+	}
+	if resTmp == nil {
+		if !graphql.HasFieldError(ctx, fc) {
+			ec.Errorf(ctx, "must not be null")
+		}
+		return graphql.Null
+	}
+	res := resTmp.(time.Time)
+	fc.Result = res
+	return ec.marshalNTime2timeᚐTime(ctx, field.Selections, res)
+}
+
+func (ec *executionContext) _TaskActivityData_name(ctx context.Context, field graphql.CollectedField, obj *TaskActivityData) (ret graphql.Marshaler) {
+	defer func() {
+		if r := recover(); r != nil {
+			ec.Error(ctx, ec.Recover(ctx, r))
+			ret = graphql.Null
+		}
+	}()
+	fc := &graphql.FieldContext{
+		Object:   "TaskActivityData",
+		Field:    field,
+		Args:     nil,
+		IsMethod: false,
+	}
+
+	ctx = graphql.WithFieldContext(ctx, fc)
+	resTmp, err := ec.ResolverMiddleware(ctx, func(rctx context.Context) (interface{}, error) {
+		ctx = rctx // use context from middleware stack in children
+		return obj.Name, nil
+	})
+	if err != nil {
+		ec.Error(ctx, err)
+		return graphql.Null
+	}
+	if resTmp == nil {
+		if !graphql.HasFieldError(ctx, fc) {
+			ec.Errorf(ctx, "must not be null")
+		}
+		return graphql.Null
+	}
+	res := resTmp.(string)
+	fc.Result = res
+	return ec.marshalNString2string(ctx, field.Selections, res)
+}
+
+func (ec *executionContext) _TaskActivityData_value(ctx context.Context, field graphql.CollectedField, obj *TaskActivityData) (ret graphql.Marshaler) {
+	defer func() {
+		if r := recover(); r != nil {
+			ec.Error(ctx, ec.Recover(ctx, r))
+			ret = graphql.Null
+		}
+	}()
+	fc := &graphql.FieldContext{
+		Object:   "TaskActivityData",
+		Field:    field,
+		Args:     nil,
+		IsMethod: false,
+	}
+
+	ctx = graphql.WithFieldContext(ctx, fc)
+	resTmp, err := ec.ResolverMiddleware(ctx, func(rctx context.Context) (interface{}, error) {
+		ctx = rctx // use context from middleware stack in children
+		return obj.Value, nil
+	})
+	if err != nil {
+		ec.Error(ctx, err)
+		return graphql.Null
+	}
+	if resTmp == nil {
+		if !graphql.HasFieldError(ctx, fc) {
+			ec.Errorf(ctx, "must not be null")
+		}
+		return graphql.Null
+	}
+	res := resTmp.(string)
+	fc.Result = res
+	return ec.marshalNString2string(ctx, field.Selections, res)
+}
+
 func (ec *executionContext) _TaskBadges_checklist(ctx context.Context, field graphql.CollectedField, obj *TaskBadges) (ret graphql.Marshaler) {
 	defer func() {
 		if r := recover(); r != nil {
@@ -17153,6 +17662,40 @@ func (ec *executionContext) unmarshalInputUpdateUserRole(ctx context.Context, ob
 
 // region    **************************** object.gotpl ****************************
 
+var causedByImplementors = []string{"CausedBy"}
+
+func (ec *executionContext) _CausedBy(ctx context.Context, sel ast.SelectionSet, obj *CausedBy) graphql.Marshaler {
+	fields := graphql.CollectFields(ec.OperationContext, sel, causedByImplementors)
+
+	out := graphql.NewFieldSet(fields)
+	var invalids uint32
+	for i, field := range fields {
+		switch field.Name {
+		case "__typename":
+			out.Values[i] = graphql.MarshalString("CausedBy")
+		case "id":
+			out.Values[i] = ec._CausedBy_id(ctx, field, obj)
+			if out.Values[i] == graphql.Null {
+				invalids++
+			}
+		case "fullName":
+			out.Values[i] = ec._CausedBy_fullName(ctx, field, obj)
+			if out.Values[i] == graphql.Null {
+				invalids++
+			}
+		case "profileIcon":
+			out.Values[i] = ec._CausedBy_profileIcon(ctx, field, obj)
+		default:
+			panic("unknown field " + strconv.Quote(field.Name))
+		}
+	}
+	out.Dispatch()
+	if invalids > 0 {
+		return graphql.Null
+	}
+	return out
+}
+
 var checklistBadgeImplementors = []string{"ChecklistBadge"}
 
 func (ec *executionContext) _ChecklistBadge(ctx context.Context, sel ast.SelectionSet, obj *ChecklistBadge) graphql.Marshaler {
@@ -19265,6 +19808,135 @@ func (ec *executionContext) _Task(ctx context.Context, sel ast.SelectionSet, obj
 				}
 				return res
 			})
+		case "activity":
+			field := field
+			out.Concurrently(i, func() (res graphql.Marshaler) {
+				defer func() {
+					if r := recover(); r != nil {
+						ec.Error(ctx, ec.Recover(ctx, r))
+					}
+				}()
+				res = ec._Task_activity(ctx, field, obj)
+				if res == graphql.Null {
+					atomic.AddUint32(&invalids, 1)
+				}
+				return res
+			})
+		default:
+			panic("unknown field " + strconv.Quote(field.Name))
+		}
+	}
+	out.Dispatch()
+	if invalids > 0 {
+		return graphql.Null
+	}
+	return out
+}
+
+var taskActivityImplementors = []string{"TaskActivity"}
+
+func (ec *executionContext) _TaskActivity(ctx context.Context, sel ast.SelectionSet, obj *db.TaskActivity) graphql.Marshaler {
+	fields := graphql.CollectFields(ec.OperationContext, sel, taskActivityImplementors)
+
+	out := graphql.NewFieldSet(fields)
+	var invalids uint32
+	for i, field := range fields {
+		switch field.Name {
+		case "__typename":
+			out.Values[i] = graphql.MarshalString("TaskActivity")
+		case "id":
+			field := field
+			out.Concurrently(i, func() (res graphql.Marshaler) {
+				defer func() {
+					if r := recover(); r != nil {
+						ec.Error(ctx, ec.Recover(ctx, r))
+					}
+				}()
+				res = ec._TaskActivity_id(ctx, field, obj)
+				if res == graphql.Null {
+					atomic.AddUint32(&invalids, 1)
+				}
+				return res
+			})
+		case "type":
+			field := field
+			out.Concurrently(i, func() (res graphql.Marshaler) {
+				defer func() {
+					if r := recover(); r != nil {
+						ec.Error(ctx, ec.Recover(ctx, r))
+					}
+				}()
+				res = ec._TaskActivity_type(ctx, field, obj)
+				if res == graphql.Null {
+					atomic.AddUint32(&invalids, 1)
+				}
+				return res
+			})
+		case "data":
+			field := field
+			out.Concurrently(i, func() (res graphql.Marshaler) {
+				defer func() {
+					if r := recover(); r != nil {
+						ec.Error(ctx, ec.Recover(ctx, r))
+					}
+				}()
+				res = ec._TaskActivity_data(ctx, field, obj)
+				if res == graphql.Null {
+					atomic.AddUint32(&invalids, 1)
+				}
+				return res
+			})
+		case "causedBy":
+			field := field
+			out.Concurrently(i, func() (res graphql.Marshaler) {
+				defer func() {
+					if r := recover(); r != nil {
+						ec.Error(ctx, ec.Recover(ctx, r))
+					}
+				}()
+				res = ec._TaskActivity_causedBy(ctx, field, obj)
+				if res == graphql.Null {
+					atomic.AddUint32(&invalids, 1)
+				}
+				return res
+			})
+		case "createdAt":
+			out.Values[i] = ec._TaskActivity_createdAt(ctx, field, obj)
+			if out.Values[i] == graphql.Null {
+				atomic.AddUint32(&invalids, 1)
+			}
+		default:
+			panic("unknown field " + strconv.Quote(field.Name))
+		}
+	}
+	out.Dispatch()
+	if invalids > 0 {
+		return graphql.Null
+	}
+	return out
+}
+
+var taskActivityDataImplementors = []string{"TaskActivityData"}
+
+func (ec *executionContext) _TaskActivityData(ctx context.Context, sel ast.SelectionSet, obj *TaskActivityData) graphql.Marshaler {
+	fields := graphql.CollectFields(ec.OperationContext, sel, taskActivityDataImplementors)
+
+	out := graphql.NewFieldSet(fields)
+	var invalids uint32
+	for i, field := range fields {
+		switch field.Name {
+		case "__typename":
+			out.Values[i] = graphql.MarshalString("TaskActivityData")
+		case "name":
+			out.Values[i] = ec._TaskActivityData_name(ctx, field, obj)
+			if out.Values[i] == graphql.Null {
+				invalids++
+			}
+		case "value":
+			out.Values[i] = ec._TaskActivityData_value(ctx, field, obj)
+			if out.Values[i] == graphql.Null {
+				invalids++
+			}
 		default:
 			panic("unknown field " + strconv.Quote(field.Name))
 		}
@@ -20324,6 +20996,15 @@ func (ec *executionContext) marshalNActionType2githubᚗcomᚋjordanknottᚋtask
 	return v
 }
 
+func (ec *executionContext) unmarshalNActivityType2githubᚗcomᚋjordanknottᚋtaskcafeᚋinternalᚋgraphᚐActivityType(ctx context.Context, v interface{}) (ActivityType, error) {
+	var res ActivityType
+	return res, res.UnmarshalGQL(v)
+}
+
+func (ec *executionContext) marshalNActivityType2githubᚗcomᚋjordanknottᚋtaskcafeᚋinternalᚋgraphᚐActivityType(ctx context.Context, sel ast.SelectionSet, v ActivityType) graphql.Marshaler {
+	return v
+}
+
 func (ec *executionContext) unmarshalNActorType2githubᚗcomᚋjordanknottᚋtaskcafeᚋinternalᚋgraphᚐActorType(ctx context.Context, v interface{}) (ActorType, error) {
 	var res ActorType
 	return res, res.UnmarshalGQL(v)
@@ -20347,6 +21028,20 @@ func (ec *executionContext) marshalNBoolean2bool(ctx context.Context, sel ast.Se
 	return res
 }
 
+func (ec *executionContext) marshalNCausedBy2githubᚗcomᚋjordanknottᚋtaskcafeᚋinternalᚋgraphᚐCausedBy(ctx context.Context, sel ast.SelectionSet, v CausedBy) graphql.Marshaler {
+	return ec._CausedBy(ctx, sel, &v)
+}
+
+func (ec *executionContext) marshalNCausedBy2ᚖgithubᚗcomᚋjordanknottᚋtaskcafeᚋinternalᚋgraphᚐCausedBy(ctx context.Context, sel ast.SelectionSet, v *CausedBy) graphql.Marshaler {
+	if v == nil {
+		if !graphql.HasFieldError(ctx, graphql.GetFieldContext(ctx)) {
+			ec.Errorf(ctx, "must not be null")
+		}
+		return graphql.Null
+	}
+	return ec._CausedBy(ctx, sel, v)
+}
+
 func (ec *executionContext) unmarshalNCreateTaskChecklist2githubᚗcomᚋjordanknottᚋtaskcafeᚋinternalᚋgraphᚐCreateTaskChecklist(ctx context.Context, v interface{}) (CreateTaskChecklist, error) {
 	return ec.unmarshalInputCreateTaskChecklist(ctx, v)
 }
@@ -21530,6 +22225,88 @@ func (ec *executionContext) marshalNTask2ᚖgithubᚗcomᚋjordanknottᚋtaskcaf
 	return ec._Task(ctx, sel, v)
 }
 
+func (ec *executionContext) marshalNTaskActivity2githubᚗcomᚋjordanknottᚋtaskcafeᚋinternalᚋdbᚐTaskActivity(ctx context.Context, sel ast.SelectionSet, v db.TaskActivity) graphql.Marshaler {
+	return ec._TaskActivity(ctx, sel, &v)
+}
+
+func (ec *executionContext) marshalNTaskActivity2ᚕgithubᚗcomᚋjordanknottᚋtaskcafeᚋinternalᚋdbᚐTaskActivityᚄ(ctx context.Context, sel ast.SelectionSet, v []db.TaskActivity) graphql.Marshaler {
+	ret := make(graphql.Array, len(v))
+	var wg sync.WaitGroup
+	isLen1 := len(v) == 1
+	if !isLen1 {
+		wg.Add(len(v))
+	}
+	for i := range v {
+		i := i
+		fc := &graphql.FieldContext{
+			Index:  &i,
+			Result: &v[i],
+		}
+		ctx := graphql.WithFieldContext(ctx, fc)
+		f := func(i int) {
+			defer func() {
+				if r := recover(); r != nil {
+					ec.Error(ctx, ec.Recover(ctx, r))
+					ret = nil
+				}
+			}()
+			if !isLen1 {
+				defer wg.Done()
+			}
+			ret[i] = ec.marshalNTaskActivity2githubᚗcomᚋjordanknottᚋtaskcafeᚋinternalᚋdbᚐTaskActivity(ctx, sel, v[i])
+		}
+		if isLen1 {
+			f(i)
+		} else {
+			go f(i)
+		}
+
+	}
+	wg.Wait()
+	return ret
+}
+
+func (ec *executionContext) marshalNTaskActivityData2githubᚗcomᚋjordanknottᚋtaskcafeᚋinternalᚋgraphᚐTaskActivityData(ctx context.Context, sel ast.SelectionSet, v TaskActivityData) graphql.Marshaler {
+	return ec._TaskActivityData(ctx, sel, &v)
+}
+
+func (ec *executionContext) marshalNTaskActivityData2ᚕgithubᚗcomᚋjordanknottᚋtaskcafeᚋinternalᚋgraphᚐTaskActivityDataᚄ(ctx context.Context, sel ast.SelectionSet, v []TaskActivityData) graphql.Marshaler {
+	ret := make(graphql.Array, len(v))
+	var wg sync.WaitGroup
+	isLen1 := len(v) == 1
+	if !isLen1 {
+		wg.Add(len(v))
+	}
+	for i := range v {
+		i := i
+		fc := &graphql.FieldContext{
+			Index:  &i,
+			Result: &v[i],
+		}
+		ctx := graphql.WithFieldContext(ctx, fc)
+		f := func(i int) {
+			defer func() {
+				if r := recover(); r != nil {
+					ec.Error(ctx, ec.Recover(ctx, r))
+					ret = nil
+				}
+			}()
+			if !isLen1 {
+				defer wg.Done()
+			}
+			ret[i] = ec.marshalNTaskActivityData2githubᚗcomᚋjordanknottᚋtaskcafeᚋinternalᚋgraphᚐTaskActivityData(ctx, sel, v[i])
+		}
+		if isLen1 {
+			f(i)
+		} else {
+			go f(i)
+		}
+
+	}
+	wg.Wait()
+	return ret
+}
+
 func (ec *executionContext) marshalNTaskBadges2githubᚗcomᚋjordanknottᚋtaskcafeᚋinternalᚋgraphᚐTaskBadges(ctx context.Context, sel ast.SelectionSet, v TaskBadges) graphql.Marshaler {
 	return ec._TaskBadges(ctx, sel, &v)
 }
@@ -22458,6 +23235,17 @@ func (ec *executionContext) marshalOChecklistBadge2ᚖgithubᚗcomᚋjordanknott
 	return ec._ChecklistBadge(ctx, sel, v)
 }
 
+func (ec *executionContext) marshalOProfileIcon2githubᚗcomᚋjordanknottᚋtaskcafeᚋinternalᚋgraphᚐProfileIcon(ctx context.Context, sel ast.SelectionSet, v ProfileIcon) graphql.Marshaler {
+	return ec._ProfileIcon(ctx, sel, &v)
+}
+
+func (ec *executionContext) marshalOProfileIcon2ᚖgithubᚗcomᚋjordanknottᚋtaskcafeᚋinternalᚋgraphᚐProfileIcon(ctx context.Context, sel ast.SelectionSet, v *ProfileIcon) graphql.Marshaler {
+	if v == nil {
+		return graphql.Null
+	}
+	return ec._ProfileIcon(ctx, sel, v)
+}
+
 func (ec *executionContext) unmarshalOProjectsFilter2githubᚗcomᚋjordanknottᚋtaskcafeᚋinternalᚋgraphᚐProjectsFilter(ctx context.Context, v interface{}) (ProjectsFilter, error) {
 	return ec.unmarshalInputProjectsFilter(ctx, v)
 }

internal/graph/graph.go

@@ -255,3 +255,15 @@ func GetActionType(actionType int32) ActionType {
 		panic("Not a valid entity type!")
 	}
 }
+
+type MemberType string
+
+const (
+	MemberTypeInvited MemberType = "INVITED"
+	MemberTypeJoined  MemberType = "JOINED"
+)
+
+type MasterEntry struct {
+	MemberType MemberType
+	ID         uuid.UUID
+}

internal/graph/helpers.go

@@ -41,3 +41,7 @@ func GetMemberList(ctx context.Context, r db.Repository, user db.UserAccount) (*
 
 	return &MemberList{Teams: teams, Projects: projects}, nil
 }
+
+type ActivityData struct {
+	Data map[string]string
+}

internal/graph/models_gen.go

@@ -22,6 +22,12 @@ type AssignTaskInput struct {
 	UserID uuid.UUID `json:"userID"`
 }
 
+type CausedBy struct {
+	ID          uuid.UUID    `json:"id"`
+	FullName    string       `json:"fullName"`
+	ProfileIcon *ProfileIcon `json:"profileIcon"`
+}
+
 type ChecklistBadge struct {
 	Complete int `json:"complete"`
 	Total    int `json:"total"`
@@ -374,6 +380,11 @@ type SortTaskGroupPayload struct {
 	Tasks       []db.Task `json:"tasks"`
 }
 
+type TaskActivityData struct {
+	Name  string `json:"name"`
+	Value string `json:"value"`
+}
+
 type TaskBadges struct {
 	Checklist *ChecklistBadge `json:"checklist"`
 }
@@ -615,6 +626,63 @@ func (e ActionType) MarshalGQL(w io.Writer) {
 	fmt.Fprint(w, strconv.Quote(e.String()))
 }
 
+type ActivityType string
+
+const (
+	ActivityTypeTaskAdded            ActivityType = "TASK_ADDED"
+	ActivityTypeTaskMoved            ActivityType = "TASK_MOVED"
+	ActivityTypeTaskMarkedComplete   ActivityType = "TASK_MARKED_COMPLETE"
+	ActivityTypeTaskMarkedIncomplete ActivityType = "TASK_MARKED_INCOMPLETE"
+	ActivityTypeTaskDueDateChanged   ActivityType = "TASK_DUE_DATE_CHANGED"
+	ActivityTypeTaskDueDateAdded     ActivityType = "TASK_DUE_DATE_ADDED"
+	ActivityTypeTaskDueDateRemoved   ActivityType = "TASK_DUE_DATE_REMOVED"
+	ActivityTypeTaskChecklistChanged ActivityType = "TASK_CHECKLIST_CHANGED"
+	ActivityTypeTaskChecklistAdded   ActivityType = "TASK_CHECKLIST_ADDED"
+	ActivityTypeTaskChecklistRemoved ActivityType = "TASK_CHECKLIST_REMOVED"
+)
+
+var AllActivityType = []ActivityType{
+	ActivityTypeTaskAdded,
+	ActivityTypeTaskMoved,
+	ActivityTypeTaskMarkedComplete,
+	ActivityTypeTaskMarkedIncomplete,
+	ActivityTypeTaskDueDateChanged,
+	ActivityTypeTaskDueDateAdded,
+	ActivityTypeTaskDueDateRemoved,
+	ActivityTypeTaskChecklistChanged,
+	ActivityTypeTaskChecklistAdded,
+	ActivityTypeTaskChecklistRemoved,
+}
+
+func (e ActivityType) IsValid() bool {
+	switch e {
+	case ActivityTypeTaskAdded, ActivityTypeTaskMoved, ActivityTypeTaskMarkedComplete, ActivityTypeTaskMarkedIncomplete, ActivityTypeTaskDueDateChanged, ActivityTypeTaskDueDateAdded, ActivityTypeTaskDueDateRemoved, ActivityTypeTaskChecklistChanged, ActivityTypeTaskChecklistAdded, ActivityTypeTaskChecklistRemoved:
+		return true
+	}
+	return false
+}
+
+func (e ActivityType) String() string {
+	return string(e)
+}
+
+func (e *ActivityType) UnmarshalGQL(v interface{}) error {
+	str, ok := v.(string)
+	if !ok {
+		return fmt.Errorf("enums must be strings")
+	}
+
+	*e = ActivityType(str)
+	if !e.IsValid() {
+		return fmt.Errorf("%s is not a valid ActivityType", str)
+	}
+	return nil
+}
+
+func (e ActivityType) MarshalGQL(w io.Writer) {
+	fmt.Fprint(w, strconv.Quote(e.String()))
+}
+
 type ActorType string
 
 const (

internal/graph/schema.graphqls

@@ -135,6 +135,38 @@ type TaskBadges {
   checklist: ChecklistBadge
 }
 
+type CausedBy {
+  id: ID!
+  fullName: String!
+  profileIcon: ProfileIcon
+}
+
+type TaskActivityData {
+  name: String!
+  value: String!
+}
+
+enum ActivityType {
+  TASK_ADDED
+  TASK_MOVED
+  TASK_MARKED_COMPLETE
+  TASK_MARKED_INCOMPLETE
+  TASK_DUE_DATE_CHANGED
+  TASK_DUE_DATE_ADDED
+  TASK_DUE_DATE_REMOVED
+  TASK_CHECKLIST_CHANGED
+  TASK_CHECKLIST_ADDED
+  TASK_CHECKLIST_REMOVED
+}
+
+type TaskActivity {
+  id: ID!
+  type: ActivityType!
+  data: [TaskActivityData!]!
+  causedBy: CausedBy!
+  createdAt: Time!
+}
+
 type Task {
   id: ID!
   taskGroup: TaskGroup!
@@ -149,6 +181,7 @@ type Task {
   labels: [TaskLabel!]!
   checklists: [TaskChecklist!]!
   badges: TaskBadges!
+  activity: [TaskActivity!]!
 }
 
 type Organization {

internal/graph/schema.resolvers.go

@@ -7,7 +7,7 @@ import (
 	"context"
 	"crypto/tls"
 	"database/sql"
-
+	"encoding/json"
 	"errors"
 	"fmt"
 	"time"
@@ -17,12 +17,11 @@ import (
 	"github.com/jordanknott/taskcafe/internal/db"
 	"github.com/jordanknott/taskcafe/internal/logger"
 	"github.com/lithammer/fuzzysearch/fuzzy"
-	gomail "gopkg.in/mail.v2"
-
 	hermes "github.com/matcornic/hermes/v2"
 	log "github.com/sirupsen/logrus"
 	"github.com/vektah/gqlparser/v2/gqlerror"
 	"golang.org/x/crypto/bcrypt"
+	gomail "gopkg.in/mail.v2"
 )
 
 func (r *labelColorResolver) ID(ctx context.Context, obj *db.LabelColor) (uuid.UUID, error) {
@@ -363,6 +362,26 @@ func (r *mutationResolver) CreateTask(ctx context.Context, input NewTask) (*db.T
 	createdAt := time.Now().UTC()
 	logger.New(ctx).WithFields(log.Fields{"positon": input.Position, "taskGroupID": input.TaskGroupID}).Info("creating task")
 	task, err := r.Repository.CreateTask(ctx, db.CreateTaskParams{input.TaskGroupID, createdAt, input.Name, input.Position})
+	if err != nil {
+		logger.New(ctx).WithError(err).Error("issue while creating task")
+		return &db.Task{}, err
+	}
+	taskGroup, err := r.Repository.GetTaskGroupByID(ctx, input.TaskGroupID)
+	if err != nil {
+		logger.New(ctx).WithError(err).Error("issue while creating task")
+		return &db.Task{}, err
+	}
+	data := map[string]string{
+		"TaskGroup": taskGroup.Name,
+	}
+	d, err := json.Marshal(data)
+	_, err = r.Repository.CreateTaskActivity(ctx, db.CreateTaskActivityParams{
+		TaskID:         task.TaskID,
+		Data:           d,
+		CreatedAt:      createdAt,
+		ActivityTypeID: 1,
+	})
+
 	if err != nil {
 		logger.New(ctx).WithError(err).Error("issue while creating task")
 		return &db.Task{}, err
@@ -387,12 +406,44 @@ func (r *mutationResolver) UpdateTaskDescription(ctx context.Context, input Upda
 }
 
 func (r *mutationResolver) UpdateTaskLocation(ctx context.Context, input NewTaskLocation) (*UpdateTaskLocationPayload, error) {
+	userID, _ := GetUserID(ctx)
 	previousTask, err := r.Repository.GetTaskByID(ctx, input.TaskID)
 	if err != nil {
 		return &UpdateTaskLocationPayload{}, err
 	}
-	task, err := r.Repository.UpdateTaskLocation(ctx, db.UpdateTaskLocationParams{input.TaskID, input.TaskGroupID, input.Position})
+	task, _ := r.Repository.UpdateTaskLocation(ctx, db.UpdateTaskLocationParams{TaskID: input.TaskID, TaskGroupID: input.TaskGroupID, Position: input.Position})
+	if previousTask.TaskGroupID != input.TaskGroupID {
+		skipAndDelete := false
+		lastMove, err := r.Repository.GetLastMoveForTaskID(ctx, input.TaskID)
+		if err == nil {
+			if lastMove.Active && lastMove.PrevTaskGroupID == input.TaskGroupID.String() {
+				skipAndDelete = true
+			}
+		}
+		if skipAndDelete {
+			_ = r.Repository.SetInactiveLastMoveForTaskID(ctx, input.TaskID)
+		} else {
+			prevTaskGroup, _ := r.Repository.GetTaskGroupByID(ctx, previousTask.TaskGroupID)
+			curTaskGroup, _ := r.Repository.GetTaskGroupByID(ctx, input.TaskGroupID)
 
+			data := map[string]string{
+				"PrevTaskGroup":   prevTaskGroup.Name,
+				"PrevTaskGroupID": prevTaskGroup.TaskGroupID.String(),
+				"CurTaskGroup":    curTaskGroup.Name,
+				"CurTaskGroupID":  curTaskGroup.TaskGroupID.String(),
+			}
+
+			createdAt := time.Now().UTC()
+			d, _ := json.Marshal(data)
+			_, err = r.Repository.CreateTaskActivity(ctx, db.CreateTaskActivityParams{
+				TaskID:         task.TaskID,
+				Data:           d,
+				CausedBy:       userID,
+				CreatedAt:      createdAt,
+				ActivityTypeID: 2,
+			})
+		}
+	}
 	return &UpdateTaskLocationPayload{Task: &task, PreviousTaskGroupID: previousTask.TaskGroupID}, err
 }
 
@@ -1558,6 +1609,72 @@ func (r *taskResolver) Badges(ctx context.Context, obj *db.Task) (*TaskBadges, e
 	return &TaskBadges{Checklist: &ChecklistBadge{Total: total, Complete: complete}}, nil
 }
 
+func (r *taskResolver) Activity(ctx context.Context, obj *db.Task) ([]db.TaskActivity, error) {
+	activity, err := r.Repository.GetActivityForTaskID(ctx, obj.TaskID)
+	if err == sql.ErrNoRows {
+		return []db.TaskActivity{}, nil
+	}
+	return activity, err
+}
+
+func (r *taskActivityResolver) ID(ctx context.Context, obj *db.TaskActivity) (uuid.UUID, error) {
+	return obj.TaskActivityID, nil
+}
+
+func (r *taskActivityResolver) Type(ctx context.Context, obj *db.TaskActivity) (ActivityType, error) {
+	switch obj.ActivityTypeID {
+	case 1:
+		return ActivityTypeTaskAdded, nil
+	case 2:
+		return ActivityTypeTaskMoved, nil
+	case 3:
+		return ActivityTypeTaskMarkedComplete, nil
+	case 4:
+		return ActivityTypeTaskMarkedIncomplete, nil
+	case 5:
+		return ActivityTypeTaskDueDateChanged, nil
+	case 6:
+		return ActivityTypeTaskDueDateAdded, nil
+	case 7:
+		return ActivityTypeTaskDueDateRemoved, nil
+	case 8:
+		return ActivityTypeTaskChecklistChanged, nil
+	case 9:
+		return ActivityTypeTaskChecklistAdded, nil
+	case 10:
+		return ActivityTypeTaskChecklistRemoved, nil
+	default:
+		return ActivityTypeTaskAdded, errors.New("unknown type")
+	}
+}
+
+func (r *taskActivityResolver) Data(ctx context.Context, obj *db.TaskActivity) ([]TaskActivityData, error) {
+	var data map[string]string
+	_ = json.Unmarshal(obj.Data, &data)
+	activity := []TaskActivityData{}
+	for name, value := range data {
+		activity = append(activity, TaskActivityData{
+			Name:  name,
+			Value: value,
+		})
+	}
+	return activity, nil
+}
+
+func (r *taskActivityResolver) CausedBy(ctx context.Context, obj *db.TaskActivity) (*CausedBy, error) {
+	user, err := r.Repository.GetUserAccountByID(ctx, obj.CausedBy)
+	var url *string
+	if user.ProfileAvatarUrl.Valid {
+		url = &user.ProfileAvatarUrl.String
+	}
+	profileIcon := &ProfileIcon{url, &user.Initials, &user.ProfileBgColor}
+	return &CausedBy{
+		ID:          obj.CausedBy,
+		FullName:    user.FullName,
+		ProfileIcon: profileIcon,
+	}, err
+}
+
 func (r *taskChecklistResolver) ID(ctx context.Context, obj *db.TaskChecklist) (uuid.UUID, error) {
 	return obj.TaskChecklistID, nil
 }
@@ -1619,6 +1736,7 @@ func (r *teamResolver) Members(ctx context.Context, obj *db.Team) ([]Member, err
 		if user.ProfileAvatarUrl.Valid {
 			url = &user.ProfileAvatarUrl.String
 		}
+		profileIcon := &ProfileIcon{url, &user.Initials, &user.ProfileBgColor}
 		role, err := r.Repository.GetRoleForTeamMember(ctx, db.GetRoleForTeamMemberParams{UserID: user.UserID, TeamID: obj.TeamID})
 		if err != nil {
 			logger.New(ctx).WithError(err).Error("get role for projet member by user ID")
@@ -1634,7 +1752,6 @@ func (r *teamResolver) Members(ctx context.Context, obj *db.Team) ([]Member, err
 			return members, err
 		}
 
-		profileIcon := &ProfileIcon{url, &user.Initials, &user.ProfileBgColor}
 		members = append(members, Member{ID: user.UserID, FullName: user.FullName, ProfileIcon: profileIcon,
 			Username: user.Username, Owned: ownedList, Member: memberList, Role: &db.Role{Code: role.Code, Name: role.Name},
 		})
@@ -1724,6 +1841,9 @@ func (r *Resolver) RefreshToken() RefreshTokenResolver { return &refreshTokenRes
 // Task returns TaskResolver implementation.
 func (r *Resolver) Task() TaskResolver { return &taskResolver{r} }
 
+// TaskActivity returns TaskActivityResolver implementation.
+func (r *Resolver) TaskActivity() TaskActivityResolver { return &taskActivityResolver{r} }
+
 // TaskChecklist returns TaskChecklistResolver implementation.
 func (r *Resolver) TaskChecklist() TaskChecklistResolver { return &taskChecklistResolver{r} }
 
@@ -1753,27 +1873,10 @@ type projectLabelResolver struct{ *Resolver }
 type queryResolver struct{ *Resolver }
 type refreshTokenResolver struct{ *Resolver }
 type taskResolver struct{ *Resolver }
+type taskActivityResolver struct{ *Resolver }
 type taskChecklistResolver struct{ *Resolver }
 type taskChecklistItemResolver struct{ *Resolver }
 type taskGroupResolver struct{ *Resolver }
 type taskLabelResolver struct{ *Resolver }
 type teamResolver struct{ *Resolver }
 type userAccountResolver struct{ *Resolver }
-
-// !!! WARNING !!!
-// The code below was going to be deleted when updating resolvers. It has been copied here so you have
-// one last chance to move it out of harms way if you want. There are two reasons this happens:
-//  - When renaming or deleting a resolver the old code will be put in here. You can safely delete
-//    it when you're done.
-//  - You have helper methods in this file. Move them out to keep these resolver files clean.
-type MemberType string
-
-const (
-	MemberTypeInvited MemberType = "INVITED"
-	MemberTypeJoined  MemberType = "JOINED"
-)
-
-type MasterEntry struct {
-	MemberType MemberType
-	ID         uuid.UUID
-}

internal/graph/schema/_models.gql

@@ -135,6 +135,38 @@ type TaskBadges {
   checklist: ChecklistBadge
 }
 
+type CausedBy {
+  id: ID!
+  fullName: String!
+  profileIcon: ProfileIcon
+}
+
+type TaskActivityData {
+  name: String!
+  value: String!
+}
+
+enum ActivityType {
+  TASK_ADDED
+  TASK_MOVED
+  TASK_MARKED_COMPLETE
+  TASK_MARKED_INCOMPLETE
+  TASK_DUE_DATE_CHANGED
+  TASK_DUE_DATE_ADDED
+  TASK_DUE_DATE_REMOVED
+  TASK_CHECKLIST_CHANGED
+  TASK_CHECKLIST_ADDED
+  TASK_CHECKLIST_REMOVED
+}
+
+type TaskActivity {
+  id: ID!
+  type: ActivityType!
+  data: [TaskActivityData!]!
+  causedBy: CausedBy!
+  createdAt: Time!
+}
+
 type Task {
   id: ID!
   taskGroup: TaskGroup!
@@ -149,6 +181,7 @@ type Task {
   labels: [TaskLabel!]!
   checklists: [TaskChecklist!]!
   badges: TaskBadges!
+  activity: [TaskActivity!]!
 }
 
 type Organization {

migrations/0060_add-task_activity-table.up.sql

@@ -0,0 +1,28 @@
+CREATE TABLE task_activity_type (
+  task_activity_type_id int PRIMARY KEY,
+  code text NOT NULL,
+  template text NOT NULL
+);
+
+INSERT INTO task_activity_type (task_activity_type_id, code, template) VALUES
+  (1, 'task_added_to_task_group', 'added this task to {{ index .Data "TaskGroup" }}'),
+  (2, 'task_moved_to_task_group', 'moved this task from {{ index .Data "PrevTaskGroup" }} to {{ index .Data "CurTaskGroup"}}'),
+  (3, 'task_mark_complete', 'marked this task complete'),
+  (4, 'task_mark_incomplete', 'marked this task incomplete'),
+  (5, 'task_due_date_changed', 'changed the due date to {{ index .Data "DueDate" }}'),
+  (6, 'task_due_date_added', 'moved this task from {{ index .Data "PrevTaskGroup" }} to {{ index .Data "CurTaskGroup"}}'),
+  (7, 'task_due_date_removed', 'moved this task from {{ index .Data "PrevTaskGroup" }} to {{ index .Data "CurTaskGroup"}}'),
+  (8, 'task_checklist_changed', 'moved this task from {{ index .Data "PrevTaskGroup" }} to {{ index .Data "CurTaskGroup"}}'),
+  (9, 'task_checklist_added', 'moved this task from {{ index .Data "PrevTaskGroup" }} to {{ index .Data "CurTaskGroup"}}'),
+  (10, 'task_checklist_removed', 'moved this task from {{ index .Data "PrevTaskGroup" }} to {{ index .Data "CurTaskGroup"}}');
+
+CREATE TABLE task_activity (
+  task_activity_id uuid PRIMARY KEY DEFAULT uuid_generate_v4(),
+  active boolean NOT NULL DEFAULT true,
+  task_id uuid NOT NULL REFERENCES task(task_id),
+  created_at timestamptz NOT NULL,
+  caused_by uuid NOT NULL,
+  activity_type_id int NOT NULL REFERENCES task_activity_type(task_activity_type_id),
+  data jsonb
+);
+