feat: add bell notification system for task assignment

internal/utils/cursor.go

@@ -0,0 +1,36 @@
+package utils
+
+import (
+	"encoding/base64"
+	"errors"
+	"fmt"
+	"strings"
+	"time"
+
+	"github.com/google/uuid"
+)
+
+func DecodeCursor(encodedCursor string) (res time.Time, id uuid.UUID, err error) {
+	byt, err := base64.StdEncoding.DecodeString(encodedCursor)
+	if err != nil {
+		return
+	}
+
+	arrStr := strings.Split(string(byt), ",")
+	if len(arrStr) != 2 {
+		err = errors.New("cursor is invalid")
+		return
+	}
+
+	res, err = time.Parse(time.RFC3339Nano, arrStr[0])
+	if err != nil {
+		return
+	}
+	id = uuid.MustParse(arrStr[1])
+	return
+}
+
+func EncodeCursor(t time.Time, id uuid.UUID) string {
+	key := fmt.Sprintf("%s,%s", t.Format(time.RFC3339Nano), id.String())
+	return base64.StdEncoding.EncodeToString([]byte(key))
+}