Mopidy service as middleware, prototype operational

src/js/services/mopidy/middleware.js

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+
+import Mopidy from 'mopidy'
+import actions from './actions'
+
+const MopidyMiddleware = (function(){ 
+
+    var socket = null;
+
+    const onOpen = (ws, store, token) => evt => {
+        console.log('opened')
+        //Send a handshake, or authenticate with remote end
+
+        //Tell the store we're connected
+        //store.dispatch(actions.connected());
+    }
+
+    const onClose = (ws, store) => evt => {
+        //Tell the store we've disconnected
+        //store.dispatch(actions.disconnected());
+    }
+
+    const handleMessage = (ws, store, type, data) => {
+
+        switch( type ){
+
+            case 'state:online':
+                //store.dispatch( actions.updateStatus( true ) );
+                instruct( ws, store, 'playback.getState' );
+                instruct( ws, store, 'playback.getVolume' );
+                instruct( ws, store, 'tracklist.getConsume' );
+                instruct( ws, store, 'tracklist.getRandom' );
+                instruct( ws, store, 'tracklist.getRepeat' );
+                instruct( ws, store, 'tracklist.getTlTracks' );
+                instruct( ws, store, 'playback.getCurrentTlTrack' );
+                break;
+
+            case 'state:offline':
+                store.dispatch( actions.updateStatus( false ) );
+                break;
+
+            case 'event:tracklistChanged':
+                instruct( ws, store, 'tracklist.getTlTracks' );
+                break;
+
+            //case 'event:trackPlaybackEnded':
+            case 'event:playbackStateChanged':
+            case 'event:trackPlaybackStarted':
+                instruct( ws, store, 'playback.getState' );
+                instruct( ws, store, 'playback.getCurrentTlTrack' );
+                break;
+
+            case 'event:volumeChanged':
+                store.dispatch( actions.updateVolume( data.volume ) );
+                break;
+
+            case 'event:optionsChanged':
+                instruct( ws, store, 'tracklist.getConsume' );
+                instruct( ws, store, 'tracklist.getRandom' );
+                instruct( ws, store, 'tracklist.getRepeat' );
+                break;
+
+            default:
+                //console.log( 'MopidyService: Unhandled event', type, message );
+        }
+    }
+
+
+    function doStuff( ws, store ){
+        console.log('doing stuff', store);
+        ws.playback.getState()
+            .then(
+                response => {
+                    store.dispatch({ type: 'STATE', state: response })
+                },
+                error => {
+                    console.error( error );
+                }
+            );
+    }
+
+
+    /**
+     * Get something from Mopidy
+     *
+     * Sends request to Mopidy server, and updates our local storage on return
+     * @param object ws Websocket
+     * @param string model Mopidy model (playback, tracklist, etc)
+     * @param string property the property to get (TlTracks, Consume, etc)
+     **/
+    const instruct = ( ws, store, call, value = false ) => {
+        console.log('Mopidy: '+call, value);
+        var callParts = call.split('.');
+        var model = callParts[0];
+        var method = callParts[1];
+        var property = method;
+        property = property.replace('get','');
+        property = property.replace('set','');
+
+        if( value ){
+            ws[model][method]( value )
+                .then(
+                    response => store.dispatch({ type: property, model: model, data: response }),
+                    error => console.error( error )
+                );
+        }else{
+            ws[model][method]()
+                .then(
+                    response => store.dispatch({ type: property, model: model, data: response }),
+                    error => console.error( error )
+                );
+        }
+    }
+
+    return store => next => action => {
+
+        switch(action.type) {
+
+            //The user wants us to connect
+            case 'CONNECT':
+
+                if(socket != null) socket.close();
+                store.dispatch({ type: 'CONNECTING' });
+
+                socket = new Mopidy({
+                    webSocketUrl: "ws://tv.barnsley.nz:6680/mopidy/ws",
+                    callingConvention: 'by-position-or-by-name'
+                });
+
+                socket.on( (type, data) => handleMessage( socket, store, type, data ) );
+
+                break;
+
+            //The user wants us to disconnect
+            case 'DISCONNECT':
+                if(socket != null) socket.close();
+                socket = null;                
+                store.dispatch({ type: 'DISCONNECTED' });
+                break;
+
+            //Send the 'SEND_MESSAGE' action down the websocket to the server
+            case 'INSTRUCT':
+                instruct( socket, store, action.call, action.value )
+                break;
+
+            //This action is irrelevant to us, pass it on to the next middleware
+            default:
+                return next(action);
+        }
+    }
+
+})();
+
+export default MopidyMiddleware