[CCSDK-28] populated the seed code for dgbuilder

[ccsdk/distribution.git] / dgbuilder / red / ui.js

diff --git a/dgbuilder/red/ui.js b/dgbuilder/red/ui.js
new file mode 100644 (file)
index 0000000..16580bf
--- /dev/null
+++ b/dgbuilder/red/ui.js
@@ -0,0 +1,77 @@
+/**
+ * Copyright 2013, 2014 IBM Corp.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ **/
+var express = require('express');
+var fs = require("fs");
+var events = require("./events");
+var path = require("path");
+
+var icon_paths = [path.resolve(__dirname + '/../public/icons')];
+
+var settings; // settings has to be global, otherwise variable not in scope for express
+
+events.on("node-icon-dir",function(dir) {
+    icon_paths.push(path.resolve(dir));
+});
+
+
+function setupUI(_settings,app) {
+    
+    settings = _settings;
+    
+    // Need to ensure the url ends with a '/' so the static serving works
+    // with relative paths
+    app.get("/",function(req,res) {
+        if (req.originalUrl.slice(-1) != "/") {
+            res.redirect(req.originalUrl+"/");
+        } else {
+            req.next();
+        }
+    });
+    
+    var iconCache = {};
+    //TODO: create a default icon
+    var defaultIcon = path.resolve(__dirname + '/../public/icons/arrow-in.png');
+    
+    app.get("/icons/:icon",function(req,res) {
+        if (iconCache[req.params.icon]) {
+            res.sendfile(iconCache[req.params.icon]); // if not found, express prints this to the console and serves 404
+        } else { 
+            for (var p=0;p<icon_paths.length;p++) {
+                var iconPath = path.join(icon_paths[p],req.params.icon);
+                if (fs.existsSync(iconPath)) {
+                    res.sendfile(iconPath);
+                    iconCache[req.params.icon] = iconPath;
+                    return;
+                }
+            }
+            res.sendfile(defaultIcon);
+        }
+    });
+    
+    app.get("/settings", function(req,res) {
+        var safeSettings = {
+            httpNodeRoot: settings.httpNodeRoot,
+            version: settings.version
+        };
+        res.json(safeSettings);
+    });
+    
+    app.use("/",express.static(__dirname + '/../public'));
+    
+    return app;
+}
+
+module.exports = setupUI;