mirror of
https://github.com/node-red/node-red.git
synced 2023-10-10 13:36:53 +02:00
259 lines
12 KiB
JavaScript
259 lines
12 KiB
JavaScript
/**
|
|
* Copyright JS Foundation and other contributors, http://js.foundation
|
|
*
|
|
* 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);
|
|
var node = this;
|
|
|
|
this.rules = n.rules;
|
|
var rule;
|
|
if (!this.rules) {
|
|
rule = {
|
|
t:(n.action=="replace"?"set":n.action),
|
|
p:n.property||""
|
|
}
|
|
|
|
if ((rule.t === "set")||(rule.t === "move")) {
|
|
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];
|
|
}
|
|
|
|
var valid = true;
|
|
for (var i=0;i<this.rules.length;i++) {
|
|
rule = this.rules[i];
|
|
// Migrate to type-aware rules
|
|
if (!rule.pt) {
|
|
rule.pt = "msg";
|
|
}
|
|
if (rule.t === "change" && rule.re) {
|
|
rule.fromt = 're';
|
|
delete rule.re;
|
|
}
|
|
if (rule.t === "set" && !rule.tot) {
|
|
if (rule.to.indexOf("msg.") === 0 && !rule.tot) {
|
|
rule.to = rule.to.substring(4);
|
|
rule.tot = "msg";
|
|
}
|
|
}
|
|
if (!rule.tot) {
|
|
rule.tot = "str";
|
|
}
|
|
if (!rule.fromt) {
|
|
rule.fromt = "str";
|
|
}
|
|
if (rule.t === "change" && rule.fromt !== 'msg' && rule.fromt !== 'flow' && rule.fromt !== 'global') {
|
|
rule.fromRE = rule.from;
|
|
if (rule.fromt !== 're') {
|
|
rule.fromRE = rule.fromRE.replace(/[-[\]{}()*+?.,\\^$|#\s]/g, "\\$&");
|
|
}
|
|
try {
|
|
rule.fromRE = new RegExp(rule.fromRE, "g");
|
|
} catch (e) {
|
|
valid = false;
|
|
this.error(RED._("change.errors.invalid-from",{error:e.message}));
|
|
}
|
|
}
|
|
if (rule.tot === 'num') {
|
|
rule.to = Number(rule.to);
|
|
} else if (rule.tot === 'json' || rule.tot === 'bin') {
|
|
try {
|
|
// check this is parsable JSON
|
|
JSON.parse(rule.to);
|
|
} catch(e2) {
|
|
valid = false;
|
|
this.error(RED._("change.errors.invalid-json"));
|
|
}
|
|
} else if (rule.tot === 'bool') {
|
|
rule.to = /^true$/i.test(rule.to);
|
|
} else if (rule.tot === 'jsonata') {
|
|
try {
|
|
rule.to = RED.util.prepareJSONataExpression(rule.to,this);
|
|
} catch(e) {
|
|
valid = false;
|
|
this.error(RED._("change.errors.invalid-expr",{error:e.message}));
|
|
}
|
|
} else if (rule.tot === 'env') {
|
|
rule.to = RED.util.evaluateNodeProperty(rule.to,'env');
|
|
}
|
|
}
|
|
|
|
function applyRule(msg,rule) {
|
|
try {
|
|
var property = rule.p;
|
|
var value = rule.to;
|
|
if (rule.tot === 'json') {
|
|
value = JSON.parse(rule.to);
|
|
} else if (rule.tot === 'bin') {
|
|
value = Buffer.from(JSON.parse(rule.to))
|
|
}
|
|
var current;
|
|
var fromValue;
|
|
var fromType;
|
|
var fromRE;
|
|
if (rule.tot === "msg") {
|
|
value = RED.util.getMessageProperty(msg,rule.to);
|
|
} else if (rule.tot === 'flow') {
|
|
value = node.context().flow.get(rule.to);
|
|
} else if (rule.tot === 'global') {
|
|
value = node.context().global.get(rule.to);
|
|
} else if (rule.tot === 'date') {
|
|
value = Date.now();
|
|
} else if (rule.tot === 'jsonata') {
|
|
try{
|
|
value = RED.util.evaluateJSONataExpression(rule.to,msg);
|
|
} catch(err) {
|
|
node.error(RED._("change.errors.invalid-expr",{error:err.message}),msg);
|
|
return;
|
|
}
|
|
}
|
|
if (rule.t === 'change') {
|
|
if (rule.fromt === 'msg' || rule.fromt === 'flow' || rule.fromt === 'global') {
|
|
if (rule.fromt === "msg") {
|
|
fromValue = RED.util.getMessageProperty(msg,rule.from);
|
|
} else if (rule.fromt === 'flow') {
|
|
fromValue = node.context().flow.get(rule.from);
|
|
} else if (rule.fromt === 'global') {
|
|
fromValue = node.context().global.get(rule.from);
|
|
}
|
|
if (typeof fromValue === 'number' || fromValue instanceof Number) {
|
|
fromType = 'num';
|
|
} else if (typeof fromValue === 'boolean') {
|
|
fromType = 'bool'
|
|
} else if (fromValue instanceof RegExp) {
|
|
fromType = 're';
|
|
fromRE = fromValue;
|
|
} else if (typeof fromValue === 'string') {
|
|
fromType = 'str';
|
|
fromRE = fromValue.replace(/[-[\]{}()*+?.,\\^$|#\s]/g, "\\$&");
|
|
try {
|
|
fromRE = new RegExp(fromRE, "g");
|
|
} catch (e) {
|
|
valid = false;
|
|
node.error(RED._("change.errors.invalid-from",{error:e.message}),msg);
|
|
return;
|
|
}
|
|
} else {
|
|
node.error(RED._("change.errors.invalid-from",{error:"unsupported type: "+(typeof fromValue)}),msg);
|
|
return
|
|
}
|
|
} else {
|
|
fromType = rule.fromt;
|
|
fromValue = rule.from;
|
|
fromRE = rule.fromRE;
|
|
}
|
|
}
|
|
if (rule.pt === 'msg') {
|
|
if (rule.t === 'delete') {
|
|
RED.util.setMessageProperty(msg,property,undefined);
|
|
} else if (rule.t === 'set') {
|
|
RED.util.setMessageProperty(msg,property,value);
|
|
} else if (rule.t === 'change') {
|
|
current = RED.util.getMessageProperty(msg,property);
|
|
if (typeof current === 'string') {
|
|
if ((fromType === 'num' || fromType === 'bool' || fromType === 'str') && current === fromValue) {
|
|
// str representation of exact from number/boolean
|
|
// only replace if they match exactly
|
|
RED.util.setMessageProperty(msg,property,value);
|
|
} else {
|
|
current = current.replace(fromRE,value);
|
|
RED.util.setMessageProperty(msg,property,current);
|
|
}
|
|
} else if ((typeof current === 'number' || current instanceof Number) && fromType === 'num') {
|
|
if (current == Number(fromValue)) {
|
|
RED.util.setMessageProperty(msg,property,value);
|
|
}
|
|
} else if (typeof current === 'boolean' && fromType === 'bool') {
|
|
if (current.toString() === fromValue) {
|
|
RED.util.setMessageProperty(msg,property,value);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
var target;
|
|
if (rule.pt === 'flow') {
|
|
target = node.context().flow;
|
|
} else if (rule.pt === 'global') {
|
|
target = node.context().global;
|
|
}
|
|
if (target) {
|
|
if (rule.t === 'delete') {
|
|
target.set(property,undefined);
|
|
} else if (rule.t === 'set') {
|
|
target.set(property,value);
|
|
} else if (rule.t === 'change') {
|
|
current = target.get(property);
|
|
if (typeof current === 'string') {
|
|
if ((fromType === 'num' || fromType === 'bool' || fromType === 'str') && current === fromValue) {
|
|
// str representation of exact from number/boolean
|
|
// only replace if they match exactly
|
|
target.set(property,value);
|
|
} else {
|
|
current = current.replace(fromRE,value);
|
|
target.set(property,current);
|
|
}
|
|
} else if ((typeof current === 'number' || current instanceof Number) && fromType === 'num') {
|
|
if (current == Number(fromValue)) {
|
|
target.set(property,value);
|
|
}
|
|
} else if (typeof current === 'boolean' && fromType === 'bool') {
|
|
if (current.toString() === fromValue) {
|
|
target.set(property,value);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
} catch(err) {/*console.log(err.stack)*/}
|
|
return msg;
|
|
}
|
|
if (valid) {
|
|
this.on('input', function(msg) {
|
|
for (var i=0; i<this.rules.length; i++) {
|
|
if (this.rules[i].t === "move") {
|
|
var r = this.rules[i];
|
|
if ((r.tot !== r.pt) || (r.p.indexOf(r.to) !== -1)) {
|
|
msg = applyRule(msg,{t:"set", p:r.to, pt:r.tot, to:r.p, tot:r.pt});
|
|
applyRule(msg,{t:"delete", p:r.p, pt:r.pt});
|
|
}
|
|
else { // 2 step move if we are moving from a child
|
|
msg = applyRule(msg,{t:"set", p:"_temp_move", pt:r.tot, to:r.p, tot:r.pt});
|
|
applyRule(msg,{t:"delete", p:r.p, pt:r.pt});
|
|
msg = applyRule(msg,{t:"set", p:r.to, pt:r.tot, to:"_temp_move", tot:r.pt});
|
|
applyRule(msg,{t:"delete", p:"_temp_move", pt:r.pt});
|
|
}
|
|
} else {
|
|
msg = applyRule(msg,this.rules[i]);
|
|
}
|
|
if (msg === null) {
|
|
return;
|
|
}
|
|
}
|
|
node.send(msg);
|
|
});
|
|
}
|
|
}
|
|
RED.nodes.registerType("change", ChangeNode);
|
|
};
|