mirror of https://github.com/node-red/node-red.git
212 lines
8.3 KiB
JavaScript
212 lines
8.3 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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//Simple node to introduce a pause into a flow
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module.exports = function(RED) {
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"use strict";
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var MILLIS_TO_NANOS = 1000000;
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var SECONDS_TO_NANOS = 1000000000;
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function DelayNode(n) {
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RED.nodes.createNode(this,n);
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this.pauseType = n.pauseType;
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this.timeoutUnits = n.timeoutUnits;
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this.randomUnits = n.randomUnits;
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this.rateUnits = n.rateUnits;
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if (n.timeoutUnits === "milliseconds") {
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this.timeout = n.timeout;
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} else if (n.timeoutUnits === "minutes") {
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this.timeout = n.timeout * (60 * 1000);
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} else if (n.timeoutUnits === "hours") {
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this.timeout = n.timeout * (60 * 60 * 1000);
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} else if (n.timeoutUnits === "days") {
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this.timeout = n.timeout * (24 * 60 * 60 * 1000);
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} else { // Default to seconds
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this.timeout = n.timeout * 1000;
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}
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if (n.rateUnits === "minute") {
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this.rate = (60 * 1000)/n.rate;
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} else if (n.rateUnits === "hour") {
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this.rate = (60 * 60 * 1000)/n.rate;
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} else if (n.rateUnits === "day") {
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this.rate = (24 * 60 * 60 * 1000)/n.rate;
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} else { // Default to seconds
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this.rate = 1000/n.rate;
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}
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this.rate *= (n.nbRateUnits > 0 ? n.nbRateUnits : 1);
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if (n.randomUnits === "milliseconds") {
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this.randomFirst = n.randomFirst * 1;
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this.randomLast = n.randomLast * 1;
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} else if (n.randomUnits === "minutes") {
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this.randomFirst = n.randomFirst * (60 * 1000);
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this.randomLast = n.randomLast * (60 * 1000);
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} else if (n.randomUnits === "hours") {
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this.randomFirst = n.randomFirst * (60 * 60 * 1000);
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this.randomLast = n.randomLast * (60 * 60 * 1000);
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} else if (n.randomUnits === "days") {
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this.randomFirst = n.randomFirst * (24 * 60 * 60 * 1000);
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this.randomLast = n.randomLast * (24 * 60 * 60 * 1000);
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} else { // Default to seconds
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this.randomFirst = n.randomFirst * 1000;
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this.randomLast = n.randomLast * 1000;
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}
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this.diff = this.randomLast - this.randomFirst;
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this.name = n.name;
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this.idList = [];
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this.buffer = [];
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this.intervalID = -1;
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this.randomID = -1;
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this.lastSent = null;
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this.drop = n.drop;
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var node = this;
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if (node.pauseType === "delay") {
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node.on("input", function(msg) {
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var id;
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id = setTimeout(function() {
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node.idList.splice(node.idList.indexOf(id),1);
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if (node.idList.length === 0) { node.status({}); }
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node.send(msg);
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}, node.timeout);
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node.idList.push(id);
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if ((node.timeout > 1000) && (node.idList.length !== 0)) {
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node.status({fill:"blue",shape:"dot",text:" "});
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}
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});
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node.on("close", function() {
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for (var i=0; i<node.idList.length; i++ ) {
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clearTimeout(node.idList[i]);
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}
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node.idList = [];
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node.status({});
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});
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} else if (node.pauseType === "rate") {
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var olddepth = 0;
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node.on("input", function(msg) {
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if (!node.drop) {
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if ( node.intervalID !== -1) {
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node.buffer.push(msg);
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if (node.buffer.length > 0) {
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node.status({text:node.buffer.length});
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}
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if ((node.buffer.length > 1000) && (olddepth < 1000)) {
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olddepth = 1000;
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node.warn(node.name + " " + RED._("delay.error.buffer"));
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}
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if ((node.buffer.length > 10000) && (olddepth < 10000)) {
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olddepth = 10000;
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node.warn(node.name + " " + RED._("delay.error.buffer1"));
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}
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} else {
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node.send(msg);
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node.intervalID = setInterval(function() {
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if (node.buffer.length === 0) {
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clearInterval(node.intervalID);
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node.intervalID = -1;
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node.status({});
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}
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if (node.buffer.length > 0) {
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node.send(node.buffer.shift());
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if (node.buffer.length < 1000) { olddepth = 0; }
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node.status({text:node.buffer.length});
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}
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},node.rate);
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}
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} else {
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var timeSinceLast;
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if (node.lastSent) {
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timeSinceLast = process.hrtime(node.lastSent);
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}
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if (!node.lastSent) { // ensuring that we always send the first message
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node.lastSent = process.hrtime();
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node.send(msg);
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} else if ( ( (timeSinceLast[0] * SECONDS_TO_NANOS) + timeSinceLast[1] ) > (node.rate * MILLIS_TO_NANOS) ) {
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node.lastSent = process.hrtime();
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node.send(msg);
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}
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}
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});
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node.on("close", function() {
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clearInterval(node.intervalID);
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node.buffer = [];
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node.status({});
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});
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} else if ((node.pauseType === "queue") || (node.pauseType === "timed")) {
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node.intervalID = setInterval(function() {
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if (node.pauseType === "queue") {
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if (node.buffer.length > 0) {
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node.send(node.buffer.shift()); // send the first on the queue
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}
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}
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else {
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while (node.buffer.length > 0) { // send the whole queue
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node.send(node.buffer.shift());
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}
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}
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node.status({text:node.buffer.length});
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},node.rate);
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node.on("input", function(msg) {
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if (!msg.hasOwnProperty("topic")) { msg.topic = "_none_"; }
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var hit = false;
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for (var b in node.buffer) { // check if already in queue
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if (msg.topic === node.buffer[b].topic) {
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node.buffer[b] = msg; // if so - replace existing entry
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hit = true;
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}
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}
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if (!hit) { node.buffer.push(msg); } // if not add to end of queue
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node.status({text:node.buffer.length});
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});
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node.on("close", function() {
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clearInterval(node.intervalID);
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node.buffer = [];
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node.status({});
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});
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} else if (node.pauseType === "random") {
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node.on("input", function(msg) {
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var wait = node.randomFirst + (node.diff * Math.random());
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var id = setTimeout(function() {
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node.idList.splice(node.idList.indexOf(id),1);
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node.send(msg);
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}, wait);
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node.idList.push(id);
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});
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node.on("close", function() {
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for (var i=0; i<node.idList.length; i++ ) {
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clearTimeout(node.idList[i]);
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}
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node.idList = [];
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});
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}
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}
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RED.nodes.registerType("delay",DelayNode);
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}
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