2016-02-13 00:18:08 +01:00
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/**
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2017-01-11 16:24:33 +01:00
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* Copyright JS Foundation and other contributors, http://js.foundation
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2016-02-13 00:18:08 +01:00
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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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2021-09-29 11:45:00 +02:00
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const crypto = require("crypto");
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2016-02-13 00:18:08 +01:00
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function LinkInNode(n) {
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RED.nodes.createNode(this,n);
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var node = this;
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2016-05-17 10:16:58 +02:00
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var event = "node:"+n.id;
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var handler = function(msg) {
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msg._event = n.event;
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node.receive(msg);
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2016-02-13 00:18:08 +01:00
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}
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2016-05-17 10:16:58 +02:00
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RED.events.on(event,handler);
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2019-11-29 01:45:12 +01:00
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this.on("input", function(msg, send, done) {
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send(msg);
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done();
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2016-05-17 10:16:58 +02:00
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});
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this.on("close",function() {
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RED.events.removeListener(event,handler);
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});
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2016-02-13 00:18:08 +01:00
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}
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RED.nodes.registerType("link in",LinkInNode);
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function LinkOutNode(n) {
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RED.nodes.createNode(this,n);
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var node = this;
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2021-09-29 11:45:00 +02:00
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var mode = n.mode || "link";
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2016-05-17 10:16:58 +02:00
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var event = "node:"+n.id;
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2019-11-29 01:45:12 +01:00
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this.on("input", function(msg, send, done) {
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2016-05-17 10:16:58 +02:00
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msg._event = event;
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RED.events.emit(event,msg)
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2021-09-29 11:45:00 +02:00
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if (mode === "return") {
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if (Array.isArray(msg._linkSource) && msg._linkSource.length > 0) {
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var messageEvent = msg._linkSource.pop();
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var returnNode = RED.nodes.getNode(messageEvent.node);
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if (returnNode && returnNode.returnLinkMessage) {
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returnNode.returnLinkMessage(messageEvent.id, msg);
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} else {
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2021-09-29 14:49:55 +02:00
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node.warn(RED._("link.error.missingReturn"))
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}
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} else {
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node.warn(RED._("link.error.missingReturn"))
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}
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done();
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} else if (mode === "link") {
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send(msg);
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done();
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}
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2016-05-17 10:16:58 +02:00
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});
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2016-02-13 00:18:08 +01:00
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}
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RED.nodes.registerType("link out",LinkOutNode);
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2021-09-29 11:45:00 +02:00
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function LinkCallNode(n) {
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RED.nodes.createNode(this,n);
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const node = this;
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const target = n.links[0];
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const messageEvents = {};
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2021-09-29 15:28:12 +02:00
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let timeout = parseFloat(n.timeout || "30")*1000;
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if (isNaN(timeout)) {
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timeout = 30000;
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}
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2021-09-29 11:45:00 +02:00
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this.on("input", function(msg, send, done) {
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msg._linkSource = msg._linkSource || [];
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const messageEvent = {
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id: crypto.randomBytes(14).toString('hex'),
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node: node.id,
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}
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messageEvents[messageEvent.id] = {
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msg: RED.util.cloneMessage(msg),
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send,
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done,
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ts: setTimeout(function() {
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timeoutMessage(messageEvent.id)
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}, timeout )
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};
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2021-09-29 11:45:00 +02:00
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msg._linkSource.push(messageEvent);
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var targetNode = RED.nodes.getNode(target);
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if (targetNode) {
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targetNode.receive(msg);
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}
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});
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this.returnLinkMessage = function(eventId, msg) {
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if (Array.isArray(msg._linkSource) && msg._linkSource.length === 0) {
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delete msg._linkSource;
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}
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const messageEvent = messageEvents[eventId];
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if (messageEvent) {
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clearTimeout(messageEvent.ts);
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delete messageEvents[eventId];
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messageEvent.send(msg);
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messageEvent.done();
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} else {
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node.send(msg);
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2021-09-29 11:45:00 +02:00
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}
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}
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2021-09-29 15:28:12 +02:00
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function timeoutMessage(eventId) {
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const messageEvent = messageEvents[eventId];
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if (messageEvent) {
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delete messageEvents[eventId];
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node.error("timeout",messageEvent.msg);
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}
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}
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2021-09-29 11:45:00 +02:00
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}
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RED.nodes.registerType("link call",LinkCallNode);
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2016-02-13 00:18:08 +01:00
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}
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