mirror of https://github.com/node-red/node-red.git
67 lines
2.2 KiB
JavaScript
67 lines
2.2 KiB
JavaScript
/**
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* Copyright 2013 IBM Corp.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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**/
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var RED = require(process.env.NODE_RED_HOME + "/red/red");
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function ChangeNode(n) {
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RED.nodes.createNode(this, n);
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this.action = n.action;
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this.property = n.property || "";
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this.from = n.from || " ";
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this.to = n.to || " ";
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var node = this;
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var makeNew = function( stem, path, value ) {
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var lastPart = (arguments.length === 3) ? path.pop() : false;
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for (var i = 0; i < path.length; i++) {
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stem = stem[path[i]] = stem[path[i]] || {};
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}
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if (lastPart) { stem = stem[lastPart] = value; }
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return stem;
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};
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this.on('input', function (msg) {
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if (node.action == "change") {
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node.re = new RegExp(this.from, "g");
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if (typeof msg[node.property] === "string") {
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msg[node.property] = (msg[node.property]).replace(node.re, node.to);
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}
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}
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//else if (node.action == "replace") {
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//if (node.to.indexOf("msg.") == 0) {
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//msg[node.property] = eval(node.to);
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//}
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//else {
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//msg[node.property] = node.to;
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//}
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//}
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else if (node.action == "replace") {
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if (node.to.indexOf("msg.") == 0) {
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makeNew( msg, node.property.split("."), eval(node.to) );
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}
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else {
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makeNew( msg, node.property.split("."), node.to );
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}
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//makeNew( msg, node.property.split("."), node.to );
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}
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else if (node.action == "delete") {
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delete(msg[node.property]);
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}
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node.send(msg);
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});
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}
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RED.nodes.registerType("change", ChangeNode);
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