- rename "Invite Room" node to "Invite to Room" to distinguish from new node

- new node "Invite Room" for receiving room invites
- new node "Leave Room" for leaving a room
- updated examples with new nodes

src/matrix-leave-room.js

@@ -0,0 +1,54 @@
+module.exports = function(RED) {
+    function MatrixLeaveRoom(n) {
+        RED.nodes.createNode(this, n);
+
+        let node = this;
+
+        this.name = n.name;
+        this.server = RED.nodes.getNode(n.server);
+        this.roomId = n.roomId;
+
+        node.status({ fill: "red", shape: "ring", text: "disconnected" });
+
+        if (!node.server) {
+            node.error("No configuration node");
+            return;
+        }
+
+        node.server.on("disconnected", function(){
+            node.status({ fill: "red", shape: "ring", text: "disconnected" });
+        });
+
+        node.server.on("connected", function() {
+            node.status({ fill: "green", shape: "ring", text: "connected" });
+        });
+
+        node.on('input', function(msg) {
+            if (! node.server || ! node.server.matrixClient) {
+                node.error("No matrix server selected");
+                return;
+            }
+
+            if(!msg.topic) {
+                node.error('No room provided in msg.topic');
+                return;
+            }
+
+            if(!node.server.isConnected()) {
+                node.error("Matrix server connection is currently closed");
+                node.send([null, msg]);
+            }
+
+            try {
+                node.log("Leaving room " + msg.topic);
+                node.server.matrixClient.leave(msg.topic);
+                node.send([msg, null]);
+            } catch(e) {
+                node.error("Failed to leave room " + msg.topic + ": " + e);
+                msg.payload = e;
+                node.send([null, msg]);
+            }
+        });
+    }
+    RED.nodes.registerType("matrix-leave-room", MatrixLeaveRoom);
+}