add method to query default room power levels

matrix-org · Sep 3, 2018 · d4ba869 · d4ba869
1 parent d29524b
commit d4ba869
Showing 1 changed file with 25 additions and 7 deletions.
diff --git a/src/models/room-state.js b/src/models/room-state.js
@@ -596,6 +596,15 @@ RoomState.prototype.maySendMessage = function(userId) {
     return this._maySendEventOfType('m.room.message', userId, false);
 };
 
+/**
+ * Check default power levels to see if it's allowed to send message events.
+ * @return {boolean} true if the default power levels permit to send
+ *                   message events into the given room.
+ */
+RoomState.prototype.maySendMessageByDefault = function() {
+    return this._maySendEventOfType('m.room.message', null, false);
+};
+
 /**
  * Returns true if the given user ID has permission to send a normal
  * event of type `eventType` into this room.
@@ -642,7 +651,8 @@ RoomState.prototype.maySendStateEvent = function(stateEventType, userId) {
  * Returns true if the given user ID has permission to send a normal or state
  * event of type `eventType` into this room.
  * @param {string} eventType The type of event to test
- * @param {string} userId The user ID of the user to test permission for
+ * @param {string} userId The user ID of the user to test permission for,
+                          or falsy if testing for default power levels in the room.
  * @param {boolean} state If true, tests if the user may send a state
                           event of this type. Otherwise tests whether
                           they may send a regular event.
@@ -651,10 +661,14 @@ RoomState.prototype.maySendStateEvent = function(stateEventType, userId) {
  *                        according to the room's state.
  */
 RoomState.prototype._maySendEventOfType = function(eventType, userId, state) {
-    const member = this.getMember(userId);
-    if (!member || member.membership == 'leave') {
-        return false;
+    let member = null;
+    if (userId) {
+        member = this.getMember(userId);
+        if (!member || member.membership == 'leave') {
+            return false;
+        }
     }
+    let powerLevel = member ? member.powerLevel : 0;
 
     const power_levels_event = this.getStateEvents('m.room.power_levels', '');
 
@@ -663,25 +677,29 @@ RoomState.prototype._maySendEventOfType = function(eventType, userId, state) {
 
     let state_default = 0;
     let events_default = 0;
+
     if (power_levels_event) {
         power_levels = power_levels_event.getContent();
         events_levels = power_levels.events || {};
 
-        if (utils.isNumber(power_levels.state_default)) {
+        if (Number.isFinite(power_levels.state_default)) {
             state_default = power_levels.state_default;
         } else {
             state_default = 50;
         }
-        if (utils.isNumber(power_levels.events_default)) {
+        if (Number.isFinite(power_levels.events_default)) {
             events_default = power_levels.events_default;
         }
+        if (!member && Number.isFinite(power_levels.users_default)) {
+            powerLevel = power_levels.users_default;
+        }
     }
 
     let required_level = state ? state_default : events_default;
     if (utils.isNumber(events_levels[eventType])) {
         required_level = events_levels[eventType];
     }
-    return member.powerLevel >= required_level;
+    return powerLevel >= required_level;
 };
 
 /**