Approve room invitations

We use to rely on Empathy for this but as we plan to allow users to be
connected on IM without having Empathy running the Shell should do it now.

https://bugzilla.gnome.org/show_bug.cgi?id=653740

js/ui/telepathyClient.js

@@ -178,19 +178,63 @@ Client.prototype = {
         }
     },
 
+    _displayRoomInvitation: function(conn, channel, dispatchOp, context) {
+        // We can only approve the rooms if we have been invited to it
+        let selfHandle = channel.group_get_self_handle();
+        if (selfHandle == 0) {
+            Shell.decline_dispatch_op(context, 'Not invited to the room');
+            return;
+        }
+
+        let [invited, inviter, reason, msg] = channel.group_get_local_pending_info(selfHandle);
+        if (!invited) {
+            Shell.decline_dispatch_op(context, 'Not invited to the room');
+            return;
+        }
+
+        // Request a TpContact for the inviter
+        Shell.get_tp_contacts(conn, [inviter],
+                contactFeatures,
+                Lang.bind(this, this._createRoomInviteSource, channel, context, dispatchOp));
+
+        context.delay();
+     },
+
+    _createRoomInviteSource: function(connection, contacts, failed, channel, context, dispatchOp) {
+        if (contacts.length < 1) {
+            Shell.decline_dispatch_op(context, 'Failed to get inviter');
+            return;
+        }
+
+        // We got the TpContact
+        let source = new RoomInviteSource(dispatchOp);
+        Main.messageTray.add(source);
+
+        let notif = new RoomInviteNotification(source, dispatchOp, channel, contacts[0]);
+        source.notify(notif);
+        context.accept();
+    },
+
     _approveChannels: function(approver, account, conn, channels,
                                dispatchOp, context) {
-        // Approve the channels right away as we are going to handle it
-        dispatchOp.claim_with_async(this._tpClient,
-                                    Lang.bind (this, function(dispatchOp, result) {
-            try {
-                dispatchOp.claim_with_finish(result);
-                this._handlingChannels(account, conn, channels);
-            } catch (err) {
-                global.logError('Failed to Claim channel: ' + err);
-            }}));
+        let channel = channels[0];
+        let [targetHandle, targetHandleType] = channel.get_handle();
 
-        context.accept();
+        if (targetHandleType == Tp.HandleType.CONTACT) {
+            // Approve private text channels right away as we are going to handle it
+            dispatchOp.claim_with_async(this._tpClient,
+                                        Lang.bind(this, function(dispatchOp, result) {
+                try {
+                    dispatchOp.claim_with_finish(result);
+                    this._handlingChannels(account, conn, channels);
+                } catch (err) {
+                    throw new Error('Failed to Claim channel: ' + err);
+                }}));
+
+            context.accept();
+        } else {
+            this._displayRoomInvitation(conn, channel, dispatchOp, context);
+        }
     },
 
     _handleChannels: function(handler, account, conn, channels,
@@ -684,3 +728,86 @@ ChatNotification.prototype = {
         this.source.respond(text);
     }
 };
+
+function RoomInviteSource(dispatchOp) {
+    this._init(dispatchOp);
+}
+
+RoomInviteSource.prototype = {
+    __proto__: MessageTray.Source.prototype,
+
+    _init: function(dispatchOp) {
+        MessageTray.Source.prototype._init.call(this, _("Invitation"));
+
+        this._setSummaryIcon(this.createNotificationIcon());
+
+        this._dispatchOp = dispatchOp;
+
+        // Destroy the source if the channel dispatch operation is invalidated
+        // as we can't approve any more.
+        this._invalidId = dispatchOp.connect('invalidated',
+                                             Lang.bind(this, function(domain, code, msg) {
+            this.destroy();
+        }));
+    },
+
+    destroy: function() {
+        if (this._invalidId != 0) {
+            this._dispatchOp.disconnect(this._invalidId);
+            this._invalidId = 0;
+        }
+
+        MessageTray.Source.prototype.destroy.call(this);
+    },
+
+    createNotificationIcon: function() {
+        // FIXME: We don't have a 'chat room' icon (bgo #653737) use
+        // system-users for now as Empathy does.
+        return new St.Icon({ icon_name: 'system-users',
+                             icon_type: St.IconType.FULLCOLOR,
+                             icon_size: this.ICON_SIZE });
+    }
+}
+
+function RoomInviteNotification(source, dispatchOp, channel, inviter) {
+    this._init(source, dispatchOp, channel, inviter);
+}
+
+RoomInviteNotification.prototype = {
+    __proto__: MessageTray.Notification.prototype,
+
+    _init: function(source, dispatchOp, channel, inviter) {
+        MessageTray.Notification.prototype._init.call(this,
+                                                      source,
+                                                      /* translators: argument is a room name like
+                                                       * room@jabber.org for example. */
+                                                      _("Invitation to %s").format(channel.get_identifier()),
+                                                      null,
+                                                      { customContent: true });
+        this.setResident(true);
+
+        /* translators: first argument is the name of a contact and the second
+         * one the name of a room. "Alice is inviting you to join room@jabber.org
+         * for example. */
+        this.addBody(_("%s is inviting you to join %s").format(inviter.get_alias(), channel.get_identifier()));
+
+        this.addButton('decline', _("Decline"));
+        this.addButton('accept', _("Accept"));
+
+        this.connect('action-invoked', Lang.bind(this, function(self, action) {
+            switch (action) {
+            case 'decline':
+                dispatchOp.leave_channels_async(Tp.ChannelGroupChangeReason.NONE,
+                                                '', function(src, result) {
+                    src.leave_channels_finish(result)});
+                break;
+            case 'accept':
+                dispatchOp.handle_with_time_async('', global.get_current_time(),
+                                                  function(src, result) {
+                    src.handle_with_time_finish(result)});
+                break;
+            }
+            this.destroy();
+        }));
+    }
+};