[CCSDK-28] populated the seed code for dgbuilder

[ccsdk/distribution.git] / dgbuilder / core_nodes / core / 20-inject.js

diff --git a/dgbuilder/core_nodes/core/20-inject.js b/dgbuilder/core_nodes/core/20-inject.js
new file mode 100644 (file)
index 0000000..dff0fb6
--- /dev/null
+++ b/dgbuilder/core_nodes/core/20-inject.js
@@ -0,0 +1,97 @@
+/**
+ * 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.
+ **/
+
+module.exports = function(RED) {
+    var cron = require("cron");
+    
+    function InjectNode(n) {
+        RED.nodes.createNode(this,n);
+        this.topic = n.topic;
+        this.payload = n.payload;
+        this.payloadType = n.payloadType;
+        this.repeat = n.repeat;
+        this.crontab = n.crontab;
+        this.once = n.once;
+        var node = this;
+        this.interval_id = null;
+        this.cronjob = null;
+    
+        if (this.repeat && !isNaN(this.repeat) && this.repeat > 0) {
+            this.repeat = this.repeat * 1000;
+            this.log("repeat = "+this.repeat);
+            this.interval_id = setInterval( function() {
+                node.emit("input",{});
+            }, this.repeat );
+        } else if (this.crontab) {
+            if (cron) {
+                this.log("crontab = "+this.crontab);
+                this.cronjob = new cron.CronJob(this.crontab,
+                    function() {
+                        node.emit("input",{});
+                    },
+                    null,true);
+            } else {
+                this.error("'cron' module not found");
+            }
+        }
+    
+        if (this.once) {
+            setTimeout( function(){ node.emit("input",{}); }, 100);
+        }
+    
+        this.on("input",function(msg) {
+            var msg = {topic:this.topic};
+            if ( (this.payloadType == null && this.payload == "") || this.payloadType == "date") {
+                msg.payload = Date.now();
+            } else if (this.payloadType == null || this.payloadType == "string") {
+                msg.payload = this.payload;
+            } else {
+                msg.payload = "";
+            }
+            this.send(msg);
+            msg = null;
+        });
+    }
+    
+    RED.nodes.registerType("inject",InjectNode);
+    
+    InjectNode.prototype.close = function() {
+        if (this.interval_id != null) {
+            clearInterval(this.interval_id);
+            this.log("inject: repeat stopped");
+        } else if (this.cronjob != null) {
+            this.cronjob.stop();
+            this.log("inject: cronjob stopped");
+            delete this.cronjob;
+        }
+    }
+    
+    RED.httpAdmin.post("/inject/:id", function(req,res) {
+            var node = RED.nodes.getNode(req.params.id);
+            if (node != null) {
+                try {
+                    node.receive();
+                    res.send(200);
+                } catch(err) {
+                    res.send(500);
+                    node.error("Inject failed:"+err);
+                    console.log(err.stack);
+                }
+            } else {
+                res.send(404);
+            }
+    });
+}