mirror of https://github.com/node-red/node-red.git
121 lines
4.2 KiB
JavaScript
121 lines
4.2 KiB
JavaScript
/**
|
|
* Copyright 2013, 2015 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";
|
|
|
|
function ChangeNode(n) {
|
|
RED.nodes.createNode(this, n);
|
|
|
|
this.rules = n.rules;
|
|
|
|
if (!this.rules) {
|
|
var rule = {
|
|
t:(n.action=="replace"?"set":n.action),
|
|
p:n.property||""
|
|
}
|
|
|
|
if (rule.t === "set") {
|
|
rule.to = n.to||"";
|
|
} else if (rule.t === "change") {
|
|
rule.from = n.from||"";
|
|
rule.to = n.to||"";
|
|
rule.re = (n.reg===null||n.reg);
|
|
}
|
|
this.rules = [rule];
|
|
}
|
|
|
|
this.actions = [];
|
|
|
|
var valid = true;
|
|
|
|
for (var i=0;i<this.rules.length;i++) {
|
|
var rule = this.rules[i];
|
|
if (rule.t === "change") {
|
|
if (rule.re === false) {
|
|
rule.from = rule.from.replace(/[-[\]{}()*+?.,\\^$|#\s]/g, "\\$&");
|
|
}
|
|
try {
|
|
rule.from = new RegExp(rule.from, "g");
|
|
} catch (e) {
|
|
valid = false;
|
|
this.error(RED._("change.errors.invalid-from",{error:e.message}));
|
|
}
|
|
}
|
|
}
|
|
|
|
function applyRule(msg,rule) {
|
|
var propertyParts;
|
|
var depth = 0;
|
|
|
|
propertyParts = rule.p.split(".");
|
|
try {
|
|
propertyParts.reduce(function(obj, i) {
|
|
var to = rule.to;
|
|
// Set msg from property to another msg property
|
|
if (rule.t === "set" && rule.to.indexOf("msg.") === 0) {
|
|
var parts = to.substring(4);
|
|
var msgPropParts = parts.split(".");
|
|
try {
|
|
msgPropParts.reduce(function(ob, j) {
|
|
to = (typeof ob[j] !== "undefined" ? ob[j] : undefined);
|
|
return to;
|
|
}, msg);
|
|
} catch (err) {}
|
|
}
|
|
|
|
if (++depth === propertyParts.length) {
|
|
if (rule.t === "change") {
|
|
if (typeof obj[i] === "string") {
|
|
obj[i] = obj[i].replace(rule.from, rule.to);
|
|
}
|
|
} else if (rule.t === "set") {
|
|
if (typeof to === "undefined") {
|
|
delete(obj[i]);
|
|
} else {
|
|
obj[i] = to;
|
|
}
|
|
} else if (rule.t === "delete") {
|
|
delete(obj[i]);
|
|
}
|
|
} else {
|
|
// to property doesn't exist, don't create empty object
|
|
if (typeof to === "undefined") {
|
|
return;
|
|
// setting a non-existent multilevel object, create empty parent
|
|
} else if (!obj[i]) {
|
|
obj[i] = {};
|
|
}
|
|
return obj[i];
|
|
}
|
|
}, msg);
|
|
} catch (err) {}
|
|
return msg;
|
|
}
|
|
|
|
if (valid) {
|
|
var node = this;
|
|
this.on('input', function(msg) {
|
|
for (var i=0;i<this.rules.length;i++) {
|
|
msg = applyRule(msg,this.rules[i]);
|
|
}
|
|
node.send(msg);
|
|
});
|
|
}
|
|
}
|
|
RED.nodes.registerType("change", ChangeNode);
|
|
};
|