[CCSDK-28] populated the seed code for dgbuilder

[ccsdk/distribution.git] / dgbuilder / core_nodes / core / 80-template.js

diff --git a/dgbuilder/core_nodes/core/80-template.js b/dgbuilder/core_nodes/core/80-template.js
new file mode 100644 (file)
index 0000000..7c84142
--- /dev/null
+++ b/dgbuilder/core_nodes/core/80-template.js
@@ -0,0 +1,61 @@
+/**
+ * Copyright 2013 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.
+ **/
+
+module.exports = function(RED) {
+    "use strict";
+    var mustache = require("mustache");
+
+    function TemplateNode(n) {
+        RED.nodes.createNode(this,n);
+        this.name = n.name;
+        this.field = n.field || "payload";
+        this.template = n.template;
+        var node = this;
+
+        var b = node.field.split(".");
+        var i = 0;
+        var m = null;
+        var rec = function(obj) {
+            i += 1;
+            if ((i < b.length) && (typeof obj[b[i-1]] === "object")) {
+                rec(obj[b[i-1]]); // not there yet - carry on digging
+            }
+            else {
+                 if (i === b.length) { // we've finished so assign the value
+                     obj[b[i-1]] = mustache.render(node.template,m);
+                     node.send(m);
+                 }
+                 else {
+                     obj[b[i-1]] = {}; // needs to be a new object so create it
+                     rec(obj[b[i-1]]); // and carry on digging
+                 }
+            }
+        }
+
+        node.on("input", function(msg) {
+            try {
+                m = msg;
+                i = 0;
+                rec(msg);
+            } catch(err) {
+                node.error(err.message);
+            }
+        });
+    }
+
+    RED.nodes.registerType("template",TemplateNode);
+    RED.library.register("templates");
+}