Closes #21

- Can now access the matrix client globally so it can be used in function nodes (this way you are not limited by only the nodes we have published)
- Added example for using the Matrix Client in a function to redact messages. This should be a great example to show people what is possible.

src/matrix-server-config.js

@@ -34,6 +34,7 @@ module.exports = function(RED) {
         this.autoAcceptRoomInvites = n.autoAcceptRoomInvites;
         this.enableE2ee = n.enableE2ee || false;
         this.e2ee = (this.enableE2ee && this.deviceId);
+        this.globalAccess = n.global;
 
         if(!this.credentials.accessToken) {
             node.log("Matrix connection failed: missing access token.");
@@ -56,6 +57,11 @@ module.exports = function(RED) {
                 deviceId: this.deviceId || undefined,
             });
 
+            // set globally if configured to do so
+            if(this.globalAccess) {
+                this.context().global.set('matrixClient["'+this.userId+'"]', node.matrixClient);
+            }
+
             node.on('close', function(done) {
                 if(node.matrixClient) {
                     node.matrixClient.close();
@@ -75,6 +81,10 @@ module.exports = function(RED) {
                     } else {
                         node.emit("disconnected");
                     }
+
+                    if(this.globalAccess) {
+                        this.context().global.set('matrixClientOnline["'+this.userId+'"]', connected);
+                    }
                 }
             };