mirror of https://github.com/node-red/node-red.git
55 lines
2.2 KiB
JavaScript
55 lines
2.2 KiB
JavaScript
/**
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* Copyright JS Foundation and other contributors, http://js.foundation
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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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module.exports = function(RED) {
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"use strict";
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function RangeNode(n) {
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RED.nodes.createNode(this, n);
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this.action = n.action;
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this.round = n.round || false;
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this.minin = Number(n.minin);
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this.maxin = Number(n.maxin);
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this.minout = Number(n.minout);
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this.maxout = Number(n.maxout);
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this.property = n.property||"payload";
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var node = this;
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this.on('input', function (msg) {
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var value = RED.util.getMessageProperty(msg,node.property);
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if (value !== undefined) {
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var n = Number(value);
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if (!isNaN(n)) {
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if (node.action == "clamp") {
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if (n < node.minin) { n = node.minin; }
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if (n > node.maxin) { n = node.maxin; }
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}
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if (node.action == "roll") {
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var divisor = node.maxin - node.minin;
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n = ((n - node.minin) % divisor + divisor) % divisor + node.minin;
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}
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value = ((n - node.minin) / (node.maxin - node.minin) * (node.maxout - node.minout)) + node.minout;
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if (node.round) { value = Math.round(value); }
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RED.util.setMessageProperty(msg,node.property,value);
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node.send(msg);
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}
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else { node.log(RED._("range.errors.notnumber")+": "+value); }
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}
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else { node.send(msg); } // If no payload - just pass it on.
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});
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}
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RED.nodes.registerType("range", RangeNode);
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}
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