Add handler for power levels in bridges (#189)

bridge/bridge.go

@@ -91,6 +91,11 @@ type DisappearingPortal interface {
 	ScheduleDisappearing()
 }
 
+type PowerLevelHandlingPortal interface {
+	Portal
+	HandleMatrixPowerLevels(sender User, evt *event.Event)
+}
+
 type User interface {
 	GetPermissionLevel() bridgeconfig.PermissionLevel
 	IsLoggedIn() bool

bridge/matrix.go

@@ -65,6 +65,7 @@ func NewMatrixHandler(br *Bridge) *MatrixHandler {
 	br.EventProcessor.On(event.StateEncryption, handler.HandleEncryption)
 	br.EventProcessor.On(event.EphemeralEventReceipt, handler.HandleReceipt)
 	br.EventProcessor.On(event.EphemeralEventTyping, handler.HandleTyping)
+	br.EventProcessor.On(event.StatePowerLevels, handler.HandlePowerLevels)
 	return handler
 }
 
@@ -686,3 +687,18 @@ func (mx *MatrixHandler) HandleTyping(_ context.Context, evt *event.Event) {
 	}
 	typingPortal.HandleMatrixTyping(evt.Content.AsTyping().UserIDs)
 }
+
+func (mx *MatrixHandler) HandlePowerLevels(_ context.Context, evt *event.Event) {
+	if mx.shouldIgnoreEvent(evt) {
+		return
+	}
+	portal := mx.bridge.Child.GetIPortal(evt.RoomID)
+	if portal == nil {
+		return
+	}
+	powerLevelPortal, ok := portal.(PowerLevelHandlingPortal)
+	if ok {
+		user := mx.bridge.Child.GetIUser(evt.Sender, true)
+		powerLevelPortal.HandleMatrixPowerLevels(user, evt)
+	}
+}