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/**
* 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 util = require("util");
var vm = require("vm");
function FunctionNode(n) {
RED.nodes.createNode(this,n);
this.name = n.name;
this.func = n.func;
var functionText = "var results = null; results = (function(msg){"+this.func+"\n})(msg);";
this.topic = n.topic;
var sandbox = {
console:console,
util:util,
Buffer:Buffer,
context: {
global:RED.settings.functionGlobalContext || {}
}
};
var context = vm.createContext(sandbox);
try {
this.script = vm.createScript(functionText);
this.on("input", function(msg) {
try {
var start = process.hrtime();
context.msg = msg;
this.script.runInContext(context);
var results = context.results;
if (results == null) {
results = [];
} else if (results.length == null) {
results = [results];
}
if (msg._topic) {
for (var m in results) {
if (results[m]) {
if (util.isArray(results[m])) {
for (var n=0; n < results[m].length; n++) {
results[m][n]._topic = msg._topic;
}
} else {
results[m]._topic = msg._topic;
}
}
}
}
this.send(results);
var duration = process.hrtime(start);
if (process.env.NODE_RED_FUNCTION_TIME) {
this.status({fill:"yellow",shape:"dot",text:""+Math.floor((duration[0]* 1e9 + duration[1])/10000)/100});
}
} catch(err) {
this.error(err.toString());
}
});
} catch(err) {
this.error(err);
}
}
RED.nodes.registerType("function",FunctionNode);
RED.library.register("functions");
}
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