Refactored plugins injection

Passes a dependency map, makes it easier to add dependencies later

app.js

@@ -72,6 +72,14 @@ var pushNavData = function() {
 };
 var navTimer = setInterval(pushNavData, 100);
 
+// Prepare dependency map for plugins
+var deps = {
+    server: server
+  , app: app
+  , io: io
+  , client: client
+};
+
 
 // Load the plugins
 var dir = path.join(__dirname, 'plugins');
@@ -79,7 +87,7 @@ config.plugins.forEach(function (plugin) {
     console.log("Loading " + plugin + " plugin.");
 
     // Load the backend code
-    require(path.join(dir, plugin))(plugin, app, io, client);
+    require(path.join(dir, plugin))(plugin, deps);
 
     // Add the public assets to a static route
     if (fs.existsSync(assets = path.join(dir, plugin, 'public'))) {

plugins/hud/index.js

@@ -1,4 +1,4 @@
-function hud(name, app, io, client) {
+function hud(name, deps) {
     // Nothing special on the backend for now    
 };
 

plugins/pilot/index.js

@@ -1,14 +1,14 @@
-function pilot(iname, app, io, client) {
-    io.sockets.on('connection', function (socket) {
+function pilot(name, deps) {
+    deps.io.sockets.on('connection', function (socket) {
         socket.on('/pilot/move', function (cmd) {
             var _name;
             console.log("move", cmd);
-            return typeof client[_name = cmd.action] === "function" ? client[_name](cmd.speed) : void 0;
+            return typeof deps.client[_name = cmd.action] === "function" ? deps.client[_name](cmd.speed) : void 0;
         });
         socket.on('/pilot/drone', function (cmd) {
            var _name;
            console.log("drone", cmd);
-           return typeof client[_name = cmd.action] === "function" ? client[_name]() : void 0;
+           return typeof deps.client[_name = cmd.action] === "function" ? deps.client[_name]() : void 0;
         });
     });
 };

plugins/video-png/index.js

@@ -1,11 +1,11 @@
 var arDrone = require('ar-drone');
 
-function video(name, app, io, client) {
+function video(name, deps) {
     
     var latestImage;
 
     // Add a new route to fetch camera image
-    app.get('/camera/:id', function(req, res) {
+    deps.app.get('/camera/:id', function(req, res) {
       if (!latestImage) {
           res.writeHead(301, {"Location": "/plugin/" + name + "/images/nofeed.jpg"});
           res.end();