New moderator app WIP:

* #144: moderator notes WIP,
* plugin size: adding an API,
* refactoring the code from the task app, to create a new MUC App
  system.

conversejs/custom/plugins/notes/index.js

@@ -0,0 +1,57 @@
+// SPDX-FileCopyrightText: 2024 John Livingston <https://www.john-livingston.fr/>
+//
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import { _converse, converse } from '../../../src/headless/index.js'
+import { XMLNS_NOTE } from './constants.js'
+import { ChatRoomNote } from './note.js'
+import { ChatRoomNotes } from './notes.js'
+import { initOrDestroyChatRoomNotes, getHeadingButtons, getMessageActionButtons } from './utils.js'
+
+import './components/muc-note-app-view.js'
+
+converse.plugins.add('livechat-converse-notes', {
+  dependencies: ['converse-muc', 'converse-disco', 'converse-pubsub'],
+
+  initialize () {
+    Object.assign(
+      _converse.exports,
+      {
+        ChatRoomNotes,
+        ChatRoomNote
+      }
+    )
+
+    _converse.api.settings.extend({
+      livechat_note_app_enabled: false,
+      livechat_note_app_restore: false // should we open the app by default if it was previously oppened?
+    })
+
+    _converse.api.listen.on('chatRoomInitialized', muc => {
+      muc.session.on('change:connection_status', _session => {
+        // When joining a room, initializing the Notes object (if user has access),
+        // When disconnected from a room, destroying the Notes object:
+        initOrDestroyChatRoomNotes(muc)
+      })
+
+      // When the current user affiliation changes, we must also delete or initialize the TaskLists object:
+      muc.occupants.on('change:affiliation', occupant => {
+        if (occupant.get('jid') !== _converse.bare_jid) { // only for myself
+          return
+        }
+        initOrDestroyChatRoomNotes(muc)
+      })
+
+      // To be sure that everything works in any case, we also must listen for addition in muc.features.
+      muc.features.on('change:' + XMLNS_NOTE, () => {
+        initOrDestroyChatRoomNotes(muc)
+      })
+    })
+
+    // adding the "Notes" button in the MUC heading buttons:
+    _converse.api.listen.on('getHeadingButtons', getHeadingButtons)
+
+    // Adding buttons on message:
+    _converse.api.listen.on('getMessageActionButtons', getMessageActionButtons)
+  }
+})