arch: move web folder into api & move api to top level

frontend/src/index.tsx

@@ -0,0 +1,146 @@
+import React from 'react';
+import ReactDOM from 'react-dom';
+import axios from 'axios';
+import createAuthRefreshInterceptor from 'axios-auth-refresh';
+import { ApolloProvider } from '@apollo/react-hooks';
+import { ApolloClient } from 'apollo-client';
+import { InMemoryCache } from 'apollo-cache-inmemory';
+import { HttpLink } from 'apollo-link-http';
+import { onError } from 'apollo-link-error';
+import { ApolloLink, Observable, fromPromise } from 'apollo-link';
+import { getAccessToken, getNewToken, setAccessToken } from 'shared/utils/accessToken';
+import App from './App';
+
+// https://able.bio/AnasT/apollo-graphql-async-access-token-refresh--470t1c8
+
+let forward$;
+let isRefreshing = false;
+let pendingRequests: any = [];
+
+const refreshAuthLogic = (failedRequest: any) =>
+  axios.post('http://localhost:3333/auth/refresh_token', {}, { withCredentials: true }).then(tokenRefreshResponse => {
+    setAccessToken(tokenRefreshResponse.data.accessToken);
+    failedRequest.response.config.headers.Authorization = `Bearer ${tokenRefreshResponse.data.accessToken}`;
+    return Promise.resolve();
+  });
+
+createAuthRefreshInterceptor(axios, refreshAuthLogic);
+
+const resolvePendingRequests = () => {
+  pendingRequests.map((callback: any) => callback());
+  pendingRequests = [];
+};
+
+const resolvePromise = (resolve: () => void) => {
+  pendingRequests.push(() => resolve());
+};
+
+const resetPendingRequests = () => {
+  pendingRequests = [];
+};
+
+const setRefreshing = (newVal: boolean) => {
+  isRefreshing = newVal;
+};
+
+const errorLink = onError(({ graphQLErrors, networkError, operation, forward }) => {
+  if (graphQLErrors) {
+    for (const err of graphQLErrors) {
+      if (err.extensions && err.extensions.code) {
+        switch (err.extensions.code) {
+          case 'UNAUTHENTICATED':
+            if (!isRefreshing) {
+              setRefreshing(true);
+              forward$ = fromPromise(
+                getNewToken()
+                  .then((response: any) => {
+                    setAccessToken(response.accessToken);
+                    resolvePendingRequests();
+                    return response.accessToken;
+                  })
+                  .catch(() => {
+                    resetPendingRequests();
+                    // TODO
+                    // Handle token refresh errors e.g clear stored tokens, redirect to login, ...
+                    return undefined;
+                  })
+                  .finally(() => {
+                    setRefreshing(false);
+                  }),
+              ).filter(value => Boolean(value));
+            } else {
+              forward$ = fromPromise(new Promise(resolvePromise));
+            }
+            return forward$.flatMap(() => forward(operation));
+          default:
+          // pass
+        }
+      }
+    }
+  }
+  if (networkError) {
+    console.log(`[Network error]: ${networkError}`);
+  }
+  return undefined;
+});
+
+const requestLink = new ApolloLink(
+  (operation, forward) =>
+    new Observable((observer: any) => {
+      let handle: any;
+      Promise.resolve(operation)
+        .then((op: any) => {
+          const accessToken = getAccessToken();
+          if (accessToken) {
+            op.setContext({
+              headers: {
+                Authorization: `Bearer ${accessToken}`,
+              },
+            });
+          }
+        })
+        .then(() => {
+          handle = forward(operation).subscribe({
+            next: observer.next.bind(observer),
+            error: observer.error.bind(observer),
+            complete: observer.complete.bind(observer),
+          });
+        })
+        .catch(observer.error.bind(observer));
+
+      return () => {
+        if (handle) {
+          handle.unsubscribe();
+        }
+      };
+    }),
+);
+
+const client = new ApolloClient({
+  link: ApolloLink.from([
+    onError(({ graphQLErrors, networkError }) => {
+      if (graphQLErrors) {
+        graphQLErrors.forEach(({ message, locations, path }) =>
+          console.log(`[GraphQL error]: Message: ${message}, Location: ${locations}, Path: ${path}`),
+        );
+      }
+      if (networkError) {
+        console.log(`[Network error]: ${networkError}`);
+      }
+    }),
+    errorLink,
+    requestLink,
+    new HttpLink({
+      uri: 'http://localhost:3333/graphql',
+      credentials: 'same-origin',
+    }),
+  ]),
+  cache: new InMemoryCache(),
+});
+
+ReactDOM.render(
+  <ApolloProvider client={client}>
+    <App />
+  </ApolloProvider>,
+  document.getElementById('root'),
+);