Add MemberPresenceAvatar and control presence ourselves

Includes rudimentary support for custom statuses and user-controlled status. Some minor tweaks have also been made to better control how we advertise our presence.

Signed-off-by: Travis Ralston <travpc@gmail.com>

src/Presence.js

@@ -56,13 +56,27 @@ class Presence {
         return this.state;
     }
 
+    /**
+     * Get the current status message.
+     * @returns {String} the status message, may be null
+     */
+    getStatusMessage() {
+        return this.statusMessage;
+    }
+
     /**
      * Set the presence state.
      * If the state has changed, the Home Server will be notified.
      * @param {string} newState the new presence state (see PRESENCE enum)
+     * @param {String} statusMessage an optional status message for the presence
+     * @param {boolean} maintain true to have this status maintained by this tracker
      */
-    setState(newState) {
-        if (newState === this.state) {
+    setState(newState, statusMessage=null, maintain=false) {
+        if (this.maintain) {
+            // Don't update presence if we're maintaining a particular status
+            return;
+        }
+        if (newState === this.state && statusMessage === this.statusMessage) {
             return;
         }
         if (PRESENCE_STATES.indexOf(newState) === -1) {
@@ -72,21 +86,37 @@ class Presence {
             return;
         }
         const old_state = this.state;
+        const old_message = this.statusMessage;
         this.state = newState;
+        this.statusMessage = statusMessage;
+        this.maintain = maintain;
 
         if (MatrixClientPeg.get().isGuest()) {
             return; // don't try to set presence when a guest; it won't work.
         }
 
+        const updateContent = {
+            presence: this.state,
+            status_msg: this.statusMessage ? this.statusMessage : '',
+        };
+
         const self = this;
-        MatrixClientPeg.get().setPresence(this.state).done(function() {
+        MatrixClientPeg.get().setPresence(updateContent).done(function() {
             console.log("Presence: %s", newState);
+
+            // We have to dispatch because the js-sdk is unreliable at telling us about our own presence
+            dis.dispatch({action: "self_presence_updated", statusInfo: updateContent});
         }, function(err) {
             console.error("Failed to set presence: %s", err);
             self.state = old_state;
+            self.statusMessage = old_message;
         });
     }
 
+    stopMaintainingStatus() {
+        this.maintain = false;
+    }
+
     /**
      * Callback called when the user made no action on the page for UNAVAILABLE_TIME ms.
      * @private
@@ -95,7 +125,8 @@ class Presence {
         this.setState("unavailable");
     }
 
-    _onUserActivity() {
+    _onUserActivity(payload) {
+        if (payload.action === "sync_state" || payload.action === "self_presence_updated") return;
         this._resetTimer();
     }