mirror of
https://github.com/node-red/node-red.git
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211 lines
8.2 KiB
JavaScript
211 lines
8.2 KiB
JavaScript
/**
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* Copyright 2016 IBM Corp.
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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 SplitNode(n) {
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RED.nodes.createNode(this,n);
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this.splt = (n.splt || "\\n").replace(/\\n/,"\n").replace(/\\r/,"\r").replace(/\\t/,"\t").replace(/\\e/,"\e").replace(/\\f/,"\f").replace(/\\0/,"\0");
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var node = this;
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this.on("input", function(msg) {
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if (msg.hasOwnProperty("payload")) {
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var a = msg.payload;
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if (msg.hasOwnProperty("parts")) { msg.parts = { parts:msg.parts }; } // push existing parts to a stack
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else { msg.parts = {}; }
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msg.parts.id = msg._msgid; // use the existing _msgid by default.
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if (typeof msg.payload === "string") { // Split String into array
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a = msg.payload.split(node.splt);
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msg.parts.ch = node.splt; // pass the split char to other end for rejoin
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msg.parts.type = "string";
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}
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if (Array.isArray(a)) { // then split array into messages
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msg.parts.type = msg.parts.type || "array"; // if it wasn't a string in the first place
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for (var i = 0; i < a.length; i++) {
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msg.payload = a[i];
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msg.parts.index = i;
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msg.parts.count = a.length;
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node.send(msg);
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}
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}
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else if ((typeof msg.payload === "object") && !Buffer.isBuffer(msg.payload)) {
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var j = 0;
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var l = Object.keys(msg.payload).length;
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var pay = msg.payload;
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msg.parts.type = "object";
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for (var p in pay) {
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if (pay.hasOwnProperty(p)) {
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msg.payload = pay[p];
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msg.parts.key = p;
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msg.parts.index = j;
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msg.parts.count = l;
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node.send(msg);
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j += 1;
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}
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}
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}
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// TODO not handling Buffers at present...
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//else { } // otherwise drop the message.
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}
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});
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}
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RED.nodes.registerType("split",SplitNode);
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function JoinNode(n) {
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RED.nodes.createNode(this,n);
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this.mode = n.mode||"auto";
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this.property = n.property||"payload";
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this.propertyType = n.propertyType||"msg";
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this.key = n.key||"topic";
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this.timer = (this.mode === "auto") ? 0 : Number(n.timeout || 0);
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this.timerr = n.timerr || "send";
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this.count = Number(n.count || 0);
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this.joiner = (n.joiner||"").replace(/\\n/g,"\n").replace(/\\r/g,"\r").replace(/\\t/g,"\t").replace(/\\e/g,"\e").replace(/\\f/g,"\f").replace(/\\0/g,"\0");
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this.build = n.build || "array";
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var node = this;
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var inflight = {};
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var completeSend = function(partId) {
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var group = inflight[partId];
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clearTimeout(group.timeout);
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delete inflight[partId];
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if (group.type === 'string') {
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group.msg.payload = group.payload.join(group.joinChar);
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} else {
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group.msg.payload = group.payload;
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}
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if (group.msg.hasOwnProperty('parts') && group.msg.parts.hasOwnProperty('parts')) {
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group.msg.parts = group.msg.parts;
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} else {
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delete group.msg.parts;
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}
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node.send(group.msg);
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}
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this.on("input", function(msg) {
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try {
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var property;
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if (node.mode === 'auto' && (!msg.hasOwnProperty("parts")||!msg.parts.hasOwnProperty("id"))) {
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// TODO: log warning - no msg.parts in auto mode, ignoring
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return;
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}
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if (node.propertyType == "full") {
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property = msg;
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} else {
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try {
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property = RED.util.getMessageProperty(msg,node.property);
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} catch(err) {
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node.warn("Message property "+node.property+" not found");
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return;
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}
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}
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var partId;
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var payloadType;
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var propertyKey;
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var targetCount;
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var joinChar;
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var propertyIndex;
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if (node.mode === "auto") {
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// Use msg.parts to identify all of the group information
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partId = msg.parts.id;
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payloadType = msg.parts.type;
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targetCount = msg.parts.count;
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joinChar = msg.parts.ch;
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propertyKey = msg.parts.key;
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propertyIndex = msg.parts.index;
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} else {
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// Use the node configuration to identify all of the group information
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partId = "_";
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payloadType = node.build;
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targetCount = node.count;
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joinChar = node.joiner;
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if (targetCount === 0 && msg.hasOwnProperty('parts')) {
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targetCount = msg.parts.count || 0;
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}
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if (node.build === 'object') {
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propertyKey = RED.util.getMessageProperty(msg,node.key);
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}
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}
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if (payloadType === 'object' && (propertyKey === null || propertyKey === undefined || propertyKey === "")) {
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//TODO: log error - no key property found for object
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return;
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}
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if (!inflight.hasOwnProperty(partId)) {
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if (payloadType === 'object') {
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inflight[partId] = {
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currentCount:0,
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payload:{},
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targetCount:targetCount,
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type:"object",
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msg:msg
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};
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} else {
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inflight[partId] = {
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currentCount:0,
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payload:[],
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targetCount:targetCount,
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type:payloadType,
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joinChar: joinChar,
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msg:msg
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};
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if (payloadType === 'string') {
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inflight[partId].joinChar = joinChar;
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}
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}
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if (node.timer > 0) {
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inflight[partId].timeout = setTimeout(function() {
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completeSend(partId)
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}, node.timer)
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}
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}
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var group = inflight[partId];
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if (payloadType === 'object') {
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group.payload[propertyKey] = property;
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group.currentCount = Object.keys(group.payload).length;
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} else {
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if (!isNaN(propertyIndex)) {
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group.payload[propertyIndex] = property;
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} else {
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group.payload.push(property);
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}
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group.currentCount++;
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}
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// TODO: currently reuse the last received - add option to pick first received
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group.msg = msg;
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if (group.currentCount === group.targetCount || msg.hasOwnProperty('complete')) {
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delete msg.complete;
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completeSend(partId);
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}
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} catch(err) {
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console.log(err.stack);
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}
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});
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this.on("close", function() {
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for (var i in inflight) {
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if (inflight.hasOwnProperty(i)) {
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clearTimeout(inflight[i].timeout);
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}
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}
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});
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}
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RED.nodes.registerType("join",JoinNode);
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}
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