feat: add ability to emit content saving notifications

apps/web/components/Objects/Editor/EditorWrapper.tsx

@@ -1,5 +1,5 @@
 'use client'
-import { default as React, useEffect } from 'react'
+import { default as React, useEffect, useRef, useState } from 'react'
 import Editor from './Editor'
 import { updateActivity } from '@services/courses/activities'
 import { toast } from 'react-hot-toast'
@@ -22,6 +22,9 @@ interface EditorWrapperProps {
 
 function EditorWrapper(props: EditorWrapperProps): JSX.Element {
   const session = useSession() as any
+  // Define provider in the state
+  const [provider, setProvider] = React.useState<HocuspocusProvider | null>(null);
+
 
   /*  Collaboration Features */
   const collab = getCollaborationServerUrl()
@@ -31,18 +34,20 @@ function EditorWrapper(props: EditorWrapperProps): JSX.Element {
   // Store the Y document in the browser
   new IndexeddbPersistence(props.activity.activity_uuid, doc)
 
-  const provider = isCollabEnabledOnThisOrg ? new HocuspocusProvider({
-    url: collab,
-    name: props.activity.activity_uuid,
-    document: doc,
-    preserveConnection: false,
-  }) : null
-  /*  Collaboration Features */
 
   async function setContent(content: any) {
     let activity = props.activity
     activity.content = content
 
+
+    provider?.setAwarenessField("savings_states", {
+      [session.user.user_uuid]: {
+        status: 'action_save',
+        timestamp: new Date().toISOString(),
+        user: session.user
+      }
+    });
+
     toast.promise(updateActivity(activity, activity.activity_uuid), {
       loading: 'Saving...',
       success: <b>Activity saved!</b>,
@@ -50,10 +55,54 @@ function EditorWrapper(props: EditorWrapperProps): JSX.Element {
     })
   }
 
-  useEffect(() => {
 
-  }
-    , [session])
+
+  // Create a ref to store the last save timestamp of each user
+  const lastSaveTimestampRef = useRef({}) as any;
+
+  useEffect(() => {
+    // Check if provider is not already set
+    if (!provider) {
+      const newProvider = new HocuspocusProvider({
+        url: collab,
+        name: props.activity.activity_uuid,
+        document: doc,
+
+        // TODO(alpha code): This whole block of code should be improved to something more efficient and less hacky
+        onAwarenessUpdate: ({ states }) => {
+          const usersStates = states;
+
+          // Check if a user has saved the document
+          usersStates.forEach((userState: any) => {
+            if (userState.savings_states) {
+              const savingsState = userState.savings_states
+
+              // Check if a user has saved the document
+              Object.keys(savingsState).forEach(user => {
+                const userObj = savingsState[user].user;
+                const status = savingsState[user].status;
+                const timestamp = savingsState[user].timestamp;
+
+                // Get the current timestamp
+                const currentTimestamp = new Date().getTime();
+
+                // If the user has saved the document and the timestamp is close to the current timestamp, show the toast
+                if (status === 'action_save' && Math.abs(currentTimestamp - new Date(timestamp).getTime()) < 10) { // 5000 milliseconds = 5 seconds
+                  // Update the last save timestamp for this user
+                  lastSaveTimestampRef.current[user] = timestamp;
+
+                  toast.success(`${userObj.first_name} ${userObj.last_name} has saved the document`);
+                }
+              });
+            }
+          })
+        },
+      });
+
+      // Set the new provider
+      setProvider(newProvider);
+    }
+  }, []);
 
 
   {