mirror of https://github.com/node-red/node-red.git
691 lines
28 KiB
JavaScript
691 lines
28 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 sendArray(node,msg,array) {
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for (var i = 0; i < array.length-1; i++) {
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msg.payload = array[i];
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msg.parts.index = node.c++;
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if (node.stream !== true) { msg.parts.count = array.length; }
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node.send(RED.util.cloneMessage(msg));
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}
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if (node.stream !== true) {
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msg.payload = array[i];
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msg.parts.index = node.c++;
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msg.parts.count = array.length;
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node.send(RED.util.cloneMessage(msg));
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node.c = 0;
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}
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else { node.remainder = array[i]; }
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}
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function SplitNode(n) {
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RED.nodes.createNode(this,n);
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var node = this;
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node.stream = n.stream;
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node.spltType = n.spltType || "str";
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node.addname = n.addname || "";
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try {
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if (node.spltType === "str") {
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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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} else if (node.spltType === "bin") {
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var spltArray = JSON.parse(n.splt);
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if (Array.isArray(spltArray)) {
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this.splt = Buffer.from(spltArray);
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} else {
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throw new Error("not an array");
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}
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this.spltBuffer = spltArray;
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} else if (node.spltType === "len") {
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this.splt = parseInt(n.splt);
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if (isNaN(this.splt) || this.splt < 1) {
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throw new Error("invalid split length: "+n.splt);
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}
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}
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this.arraySplt = (n.arraySplt === undefined)?1:parseInt(n.arraySplt);
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if (isNaN(this.arraySplt) || this.arraySplt < 1) {
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throw new Error("invalid array split length: "+n.arraySplt);
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}
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} catch(err) {
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this.error("Invalid split property: "+err.toString());
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return;
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}
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node.c = 0;
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node.buffer = Buffer.from([]);
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this.on("input", function(msg) {
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if (msg.hasOwnProperty("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 = RED.util.generateId(); // generate a random id
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delete msg._msgid;
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if (typeof msg.payload === "string") { // Split String into array
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msg.payload = (node.remainder || "") + msg.payload;
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msg.parts.type = "string";
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if (node.spltType === "len") {
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msg.parts.ch = "";
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msg.parts.len = node.splt;
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var count = msg.payload.length/node.splt;
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if (Math.floor(count) !== count) {
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count = Math.ceil(count);
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}
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if (node.stream !== true) {
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msg.parts.count = count;
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node.c = 0;
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}
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var pos = 0;
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var data = msg.payload;
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for (var i=0; i<count-1; i++) {
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msg.payload = data.substring(pos,pos+node.splt);
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msg.parts.index = node.c++;
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pos += node.splt;
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node.send(RED.util.cloneMessage(msg));
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}
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node.remainder = data.substring(pos);
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if ((node.stream !== true) || (node.remainder.length === node.splt)) {
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msg.payload = node.remainder;
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msg.parts.index = node.c++;
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node.send(RED.util.cloneMessage(msg));
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node.remainder = "";
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}
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}
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else {
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var a = [];
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if (node.spltType === "bin") {
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if (!node.spltBufferString) {
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node.spltBufferString = node.splt.toString();
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}
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a = msg.payload.split(node.spltBufferString);
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msg.parts.ch = node.spltBuffer; // pass the split char to other end for rejoin
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} else if (node.spltType === "str") {
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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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}
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sendArray(node,msg,a);
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}
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}
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else if (Array.isArray(msg.payload)) { // then split array into messages
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msg.parts.type = "array";
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var count = msg.payload.length/node.arraySplt;
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if (Math.floor(count) !== count) {
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count = Math.ceil(count);
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}
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msg.parts.count = count;
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var pos = 0;
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var data = msg.payload;
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msg.parts.len = node.arraySplt;
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for (var i=0; i<count; i++) {
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msg.payload = data.slice(pos,pos+node.arraySplt);
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if (node.arraySplt === 1) {
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msg.payload = msg.payload[0];
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}
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msg.parts.index = i;
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pos += node.arraySplt;
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node.send(RED.util.cloneMessage(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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if (node.addname !== "") {
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msg[node.addname] = p;
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}
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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(RED.util.cloneMessage(msg));
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j += 1;
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}
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}
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}
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else if (Buffer.isBuffer(msg.payload)) {
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var len = node.buffer.length + msg.payload.length;
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var buff = Buffer.concat([node.buffer, msg.payload], len);
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msg.parts.type = "buffer";
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if (node.spltType === "len") {
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var count = buff.length/node.splt;
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if (Math.floor(count) !== count) {
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count = Math.ceil(count);
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}
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if (node.stream !== true) {
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msg.parts.count = count;
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node.c = 0;
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}
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var pos = 0;
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msg.parts.len = node.splt;
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for (var i=0; i<count-1; i++) {
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msg.payload = buff.slice(pos,pos+node.splt);
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msg.parts.index = node.c++;
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pos += node.splt;
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node.send(RED.util.cloneMessage(msg));
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}
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node.buffer = buff.slice(pos);
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if ((node.stream !== true) || (node.buffer.length === node.splt)) {
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msg.payload = node.buffer;
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msg.parts.index = node.c++;
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node.send(RED.util.cloneMessage(msg));
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node.buffer = Buffer.from([]);
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}
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}
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else {
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var count = 0;
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if (node.spltType === "bin") {
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msg.parts.ch = node.spltBuffer;
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} else if (node.spltType === "str") {
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msg.parts.ch = node.splt;
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}
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var pos = buff.indexOf(node.splt);
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var end;
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while (pos > -1) {
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count++;
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end = pos+node.splt.length;
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pos = buff.indexOf(node.splt,end);
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}
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count++;
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if (node.stream !== true) {
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msg.parts.count = count;
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node.c = 0;
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}
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var i = 0, p = 0;
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pos = buff.indexOf(node.splt);
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while (pos > -1) {
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msg.payload = buff.slice(p,pos);
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msg.parts.index = node.c++;
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node.send(RED.util.cloneMessage(msg));
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i++;
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p = pos+node.splt.length;
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pos = buff.indexOf(node.splt,p);
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}
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if ((node.stream !== true) && (p < buff.length)) {
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msg.payload = buff.slice(p,buff.length);
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msg.parts.index = node.c++;
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msg.parts.count = node.c++;
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node.send(RED.util.cloneMessage(msg));
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}
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else {
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node.buffer = buff.slice(p,buff.length);
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}
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}
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}
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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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var _max_kept_msgs_count;
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function max_kept_msgs_count(node) {
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if (_max_kept_msgs_count === undefined) {
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var name = "nodeMessageBufferMaxLength";
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if (RED.settings.hasOwnProperty(name)) {
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_max_kept_msgs_count = RED.settings[name];
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}
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else {
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_max_kept_msgs_count = 0;
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}
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}
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return _max_kept_msgs_count;
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}
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function apply_r(exp, accum, msg, index, count) {
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exp.assign("I", index);
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exp.assign("N", count);
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exp.assign("A", accum);
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return new Promise((resolve,reject) => {
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RED.util.evaluateJSONataExpression(exp, msg, (err, result) => {
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if (err) {
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reject(err);
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} else {
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resolve(result);
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}
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});
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});
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}
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function apply_f(exp, accum, count) {
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exp.assign("N", count);
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exp.assign("A", accum);
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return new Promise((resolve,reject) => {
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return RED.util.evaluateJSONataExpression(exp, {}, (err, result) => {
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if (err) {
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reject(err);
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} else {
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resolve(result);
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}
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});
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});
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}
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function exp_or_undefined(exp) {
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if((exp === "") ||
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(exp === null)) {
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return undefined;
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}
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return exp
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}
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function reduceAndSendGroup(node, group) {
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var is_right = node.reduce_right;
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var flag = is_right ? -1 : 1;
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var msgs = group.msgs;
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return getInitialReduceValue(node, node.exp_init, node.exp_init_type).then(accum => {
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var reduce_exp = node.reduce_exp;
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var reduce_fixup = node.reduce_fixup;
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var count = group.count;
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msgs.sort(function(x,y) {
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var ix = x.parts.index;
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var iy = y.parts.index;
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if (ix < iy) {return -flag;}
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if (ix > iy) {return flag;}
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return 0;
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});
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return msgs.reduce((promise, msg) => promise.then(accum => apply_r(reduce_exp, accum, msg, msg.parts.index, count)), Promise.resolve(accum))
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.then(accum => {
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if(reduce_fixup !== undefined) {
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return apply_f(reduce_fixup, accum, count).then(accum => {
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node.send({payload: accum});
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});
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} else {
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node.send({payload: accum});
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}
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});
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}).catch(err => {
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throw new Error(RED._("join.errors.invalid-expr",{error:err.message}));
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});
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}
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function reduce_msg(node, msg) {
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var promise;
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if (msg.hasOwnProperty('parts')) {
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var parts = msg.parts;
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var pending = node.pending;
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var pending_count = node.pending_count;
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var gid = msg.parts.id;
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var count;
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if(!pending.hasOwnProperty(gid)) {
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if(parts.hasOwnProperty('count')) {
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count = msg.parts.count;
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}
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pending[gid] = {
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count: count,
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msgs: []
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};
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}
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var group = pending[gid];
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var msgs = group.msgs;
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if(parts.hasOwnProperty('count') && (group.count === undefined)) {
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group.count = parts.count;
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}
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msgs.push(msg);
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pending_count++;
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var completeProcess = function() {
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node.pending_count = pending_count;
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var max_msgs = max_kept_msgs_count(node);
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if ((max_msgs > 0) && (pending_count > max_msgs)) {
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node.pending = {};
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node.pending_count = 0;
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var promise = Promise.reject(RED._("join.too-many"));
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promise.catch(()=>{});
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return promise;
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}
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return Promise.resolve();
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}
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if(msgs.length === group.count) {
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delete pending[gid];
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pending_count -= msgs.length;
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promise = reduceAndSendGroup(node, group).then(completeProcess);
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} else {
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promise = completeProcess();
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}
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} else {
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node.send(msg);
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}
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if (!promise) {
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promise = Promise.resolve();
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}
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return promise;
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}
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function getInitialReduceValue(node, exp, exp_type) {
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return new Promise((resolve, reject) => {
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RED.util.evaluateNodeProperty(exp, exp_type, node, {},
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(err, result) => {
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if(err) {
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return reject(err);
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}
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else {
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return resolve(result);
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}
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});
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});
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}
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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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if (this.propertyType === 'full') {
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this.property = "payload";
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}
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this.key = n.key||"topic";
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this.timer = (this.mode === "auto") ? 0 : Number(n.timeout || 0)*1000;
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this.count = Number(n.count || 0);
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this.joiner = n.joiner||"";
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this.joinerType = n.joinerType||"str";
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this.reduce = (this.mode === "reduce");
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if (this.reduce) {
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this.exp_init = n.reduceInit;
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this.exp_init_type = n.reduceInitType;
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var exp_reduce = n.reduceExp;
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var exp_fixup = exp_or_undefined(n.reduceFixup);
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this.reduce_right = n.reduceRight;
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try {
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this.reduce_exp = RED.util.prepareJSONataExpression(exp_reduce, this);
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this.reduce_fixup = (exp_fixup !== undefined) ? RED.util.prepareJSONataExpression(exp_fixup, this) : undefined;
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} catch(e) {
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this.error(RED._("join.errors.invalid-expr",{error:e.message}));
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return;
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}
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}
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if (this.joinerType === "str") {
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this.joiner = this.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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} else if (this.joinerType === "bin") {
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var joinArray = JSON.parse(n.joiner)
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if (Array.isArray(joinArray)) {
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this.joiner = Buffer.from(joinArray);
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} else {
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throw new Error("not an array");
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}
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}
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this.build = n.build || "array";
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this.accumulate = n.accumulate || "false";
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this.topics = (n.topics || []).map(function(x) { return x.topic; });
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this.merge_on_change = n.mergeOnChange || false;
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this.topic_counts = undefined;
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this.output = n.output || "stream";
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this.pending = {};
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this.pending_count = 0;
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//this.topic = n.topic;
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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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if ((node.accumulate !== true) || group.msg.hasOwnProperty("complete")) { delete inflight[partId]; }
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if (group.type === 'array' && group.arrayLen > 1) {
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var newArray = [];
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group.payload.forEach(function(n) {
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newArray = newArray.concat(n);
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})
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group.payload = newArray;
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}
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else if (group.type === 'buffer') {
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var buffers = [];
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var bufferLen = 0;
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if (group.joinChar !== undefined) {
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var joinBuffer = Buffer.from(group.joinChar);
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for (var i=0; i<group.payload.length; i++) {
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if (i > 0) {
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buffers.push(joinBuffer);
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bufferLen += joinBuffer.length;
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}
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buffers.push(group.payload[i]);
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bufferLen += group.payload[i].length;
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}
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}
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else {
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bufferLen = group.bufferLen;
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buffers = group.payload;
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}
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group.payload = Buffer.concat(buffers,bufferLen);
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}
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if (group.type === 'string') {
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var groupJoinChar = group.joinChar;
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if (typeof group.joinChar !== 'string') {
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groupJoinChar = group.joinChar.toString();
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}
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RED.util.setMessageProperty(group.msg,node.property,group.payload.join(groupJoinChar));
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}
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else {
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if (node.propertyType === 'full') {
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group.msg = RED.util.cloneMessage(group.msg);
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}
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RED.util.setMessageProperty(group.msg,node.property,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.parts;
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}
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else {
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delete group.msg.parts;
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}
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delete group.msg.complete;
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node.send(group.msg);
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}
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var pendingMessages = [];
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var activeMessagePromise = null;
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// In reduce mode, we must process messages fully in order otherwise
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// groups may overlap and cause unexpected results. The use of JSONata
|
|
// means some async processing *might* occur if flow/global context is
|
|
// accessed.
|
|
var processReduceMessageQueue = function(msg) {
|
|
if (msg) {
|
|
// A new message has arrived - add it to the message queue
|
|
pendingMessages.push(msg);
|
|
if (activeMessagePromise !== null) {
|
|
// The node is currently processing a message, so do nothing
|
|
// more with this message
|
|
return;
|
|
}
|
|
}
|
|
if (pendingMessages.length === 0) {
|
|
// There are no more messages to process, clear the active flag
|
|
// and return
|
|
activeMessagePromise = null;
|
|
return;
|
|
}
|
|
|
|
// There are more messages to process. Get the next message and
|
|
// start processing it. Recurse back in to check for any more
|
|
var nextMsg = pendingMessages.shift();
|
|
activeMessagePromise = reduce_msg(node, nextMsg)
|
|
.then(processReduceMessageQueue)
|
|
.catch((err) => {
|
|
node.error(err,nextMsg);
|
|
return processReduceMessageQueue();
|
|
});
|
|
}
|
|
|
|
this.on("input", function(msg) {
|
|
try {
|
|
var property;
|
|
if (node.mode === 'auto' && (!msg.hasOwnProperty("parts")||!msg.parts.hasOwnProperty("id"))) {
|
|
node.warn("Message missing msg.parts property - cannot join in 'auto' mode")
|
|
return;
|
|
}
|
|
|
|
if (node.propertyType == "full") {
|
|
property = msg;
|
|
}
|
|
else {
|
|
try {
|
|
property = RED.util.getMessageProperty(msg,node.property);
|
|
} catch(err) {
|
|
node.warn("Message property "+node.property+" not found");
|
|
return;
|
|
}
|
|
}
|
|
|
|
var partId;
|
|
var payloadType;
|
|
var propertyKey;
|
|
var targetCount;
|
|
var joinChar;
|
|
var arrayLen;
|
|
var propertyIndex;
|
|
if (node.mode === "auto") {
|
|
// Use msg.parts to identify all of the group information
|
|
partId = msg.parts.id;
|
|
payloadType = msg.parts.type;
|
|
targetCount = msg.parts.count;
|
|
joinChar = msg.parts.ch;
|
|
propertyKey = msg.parts.key;
|
|
arrayLen = msg.parts.len;
|
|
propertyIndex = msg.parts.index;
|
|
}
|
|
else if (node.mode === 'reduce') {
|
|
return processReduceMessageQueue(msg);
|
|
}
|
|
else {
|
|
// Use the node configuration to identify all of the group information
|
|
partId = "_";
|
|
payloadType = node.build;
|
|
targetCount = node.count;
|
|
joinChar = node.joiner;
|
|
if (n.count === "" && msg.hasOwnProperty('parts')) {
|
|
targetCount = msg.parts.count || 0;
|
|
}
|
|
if (node.build === 'object') {
|
|
propertyKey = RED.util.getMessageProperty(msg,node.key);
|
|
}
|
|
}
|
|
|
|
if ((payloadType === 'object') && (propertyKey === null || propertyKey === undefined || propertyKey === "")) {
|
|
if (node.mode === "auto") {
|
|
node.warn("Message missing 'msg.parts.key' property - cannot add to object");
|
|
}
|
|
else {
|
|
if (msg.hasOwnProperty('complete')) {
|
|
if (inflight[partId]) {
|
|
inflight[partId].msg.complete = msg.complete;
|
|
completeSend(partId);
|
|
}
|
|
}
|
|
else {
|
|
node.warn("Message missing key property 'msg."+node.key+"' - cannot add to object")
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (msg.hasOwnProperty("reset")) { if (inflight[partid]) { delete inflight[partId] } return; }
|
|
if (!inflight.hasOwnProperty(partId)) {
|
|
if (payloadType === 'object' || payloadType === 'merged') {
|
|
inflight[partId] = {
|
|
currentCount:0,
|
|
payload:{},
|
|
targetCount:targetCount,
|
|
type:"object",
|
|
msg:RED.util.cloneMessage(msg)
|
|
};
|
|
}
|
|
else {
|
|
inflight[partId] = {
|
|
currentCount:0,
|
|
payload:[],
|
|
targetCount:targetCount,
|
|
type:payloadType,
|
|
msg:RED.util.cloneMessage(msg)
|
|
};
|
|
if (payloadType === 'string') {
|
|
inflight[partId].joinChar = joinChar;
|
|
} else if (payloadType === 'array') {
|
|
inflight[partId].arrayLen = arrayLen;
|
|
} else if (payloadType === 'buffer') {
|
|
inflight[partId].bufferLen = 0;
|
|
inflight[partId].joinChar = joinChar;
|
|
}
|
|
}
|
|
if (node.timer > 0) {
|
|
inflight[partId].timeout = setTimeout(function() {
|
|
completeSend(partId)
|
|
}, node.timer)
|
|
}
|
|
}
|
|
|
|
var group = inflight[partId];
|
|
if (payloadType === 'buffer') {
|
|
inflight[partId].bufferLen += property.length;
|
|
}
|
|
if (payloadType === 'object') {
|
|
group.payload[propertyKey] = property;
|
|
group.currentCount = Object.keys(group.payload).length;
|
|
//msg.topic = node.topic || msg.topic;
|
|
} else if (payloadType === 'merged') {
|
|
if (Array.isArray(property) || typeof property !== 'object') {
|
|
if (!msg.hasOwnProperty("complete")) {
|
|
node.warn("Cannot merge non-object types");
|
|
}
|
|
} else {
|
|
for (propertyKey in property) {
|
|
if (property.hasOwnProperty(propertyKey) && propertyKey !== '_msgid') {
|
|
group.payload[propertyKey] = property[propertyKey];
|
|
}
|
|
}
|
|
group.currentCount = Object.keys(group.payload).length;
|
|
//group.currentCount++;
|
|
}
|
|
} else {
|
|
if (!isNaN(propertyIndex)) {
|
|
group.payload[propertyIndex] = property;
|
|
group.currentCount++;
|
|
} else {
|
|
if (property !== undefined) {
|
|
group.payload.push(property);
|
|
group.currentCount++;
|
|
}
|
|
}
|
|
}
|
|
group.msg = Object.assign(group.msg, msg);
|
|
var tcnt = group.targetCount;
|
|
if (msg.hasOwnProperty("parts")) { tcnt = group.targetCount || msg.parts.count; }
|
|
if ((tcnt > 0 && group.currentCount >= tcnt) || msg.hasOwnProperty('complete')) {
|
|
completeSend(partId);
|
|
}
|
|
}
|
|
catch(err) {
|
|
console.log(err.stack);
|
|
}
|
|
});
|
|
|
|
this.on("close", function() {
|
|
for (var i in inflight) {
|
|
if (inflight.hasOwnProperty(i)) {
|
|
clearTimeout(inflight[i].timeout);
|
|
}
|
|
}
|
|
});
|
|
}
|
|
RED.nodes.registerType("join",JoinNode);
|
|
}
|