Fix 355: Make the ConverseJS dropdown menu available everywhere (WIP)

conversejs/lib/converse-params.ts

@@ -77,6 +77,7 @@ function defaultConverseParams (
     whitelisted_plugins: [
       'livechatWindowTitlePlugin',
       'livechatSpecifics',
+      'livechatMiniMucHeadPlugin',
       'livechatViewerModePlugin',
       'livechatDisconnectOnUnloadPlugin',
       'converse-slow-mode'

conversejs/lib/plugins/livechat-mini-muc-head.ts

@@ -0,0 +1,25 @@
+/**
+ * Plugin to add buttons (help, close, open in another window) in the muc menu,
+ * when we are embedded in Peertube.
+ */
+export const livechatMiniMucHeadPlugin = {
+  dependencies: ['converse-muc', 'converse-muc-views'],
+  initialize: function (this: any) {
+    const _converse = this._converse
+    _converse.api.settings.extend({
+      // tells the overloaded template to render differently.
+      livechat_mini_muc_head: false
+    })
+
+    _converse.api.listen.on('getHeadingButtons', (view: any, buttons: any[]) => {
+      if (view.model.get('type') !== _converse.CHATROOMS_TYPE) {
+        // only on MUC.
+        return
+      }
+
+      // removing the 'show/hide topic' buttons
+      buttons = buttons.filter(b => b.name !== 'toggle-topic')
+      return buttons
+    })
+  }
+}