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* Copyright JS Foundation and other contributors, http://js.foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
**/
module.exports = function(RED) {
"use strict";
function sendArray(node,msg,array,send) {
for (var i = 0; i < array.length-1; i++) {
msg.payload = array[i];
msg.parts.index = node.c++;
if (node.stream !== true) { msg.parts.count = array.length; }
send(RED.util.cloneMessage(msg));
}
if (node.stream !== true) {
msg.payload = array[i];
msg.parts.index = node.c++;
msg.parts.count = array.length;
send(RED.util.cloneMessage(msg));
node.c = 0;
}
else { node.remainder = array[i]; }
}
function SplitNode(n) {
RED.nodes.createNode(this,n);
var node = this;
node.stream = n.stream;
node.spltType = n.spltType || "str";
node.addname = n.addname || "";
try {
if (node.spltType === "str") {
this.splt = (n.splt || "\\n").replace(/\\n/g,"\n").replace(/\\r/g,"\r").replace(/\\t/g,"\t").replace(/\\e/g,"\e").replace(/\\f/g,"\f").replace(/\\0/g,"\0");
} else if (node.spltType === "bin") {
var spltArray = JSON.parse(n.splt);
if (Array.isArray(spltArray)) {
this.splt = Buffer.from(spltArray);
} else {
throw new Error("not an array");
}
this.spltBuffer = spltArray;
} else if (node.spltType === "len") {
this.splt = parseInt(n.splt);
if (isNaN(this.splt) || this.splt < 1) {
throw new Error("invalid split length: "+n.splt);
}
}
this.arraySplt = (n.arraySplt === undefined)?1:parseInt(n.arraySplt);
if (isNaN(this.arraySplt) || this.arraySplt < 1) {
throw new Error("invalid array split length: "+n.arraySplt);
}
} catch(err) {
this.error("Invalid split property: "+err.toString());
return;
}
node.c = 0;
node.buffer = Buffer.from([]);
node.pendingDones = [];
this.on("input", function(msg, send, done) {
if (msg.hasOwnProperty("payload")) {
if (msg.hasOwnProperty("parts")) { msg.parts = { parts:msg.parts }; } // push existing parts to a stack
else { msg.parts = {}; }
msg.parts.id = RED.util.generateId(); // generate a random id
delete msg._msgid;
if (typeof msg.payload === "string") { // Split String into array
msg.payload = (node.remainder || "") + msg.payload;
msg.parts.type = "string";
if (node.spltType === "len") {
msg.parts.ch = "";
msg.parts.len = node.splt;
var count = msg.payload.length/node.splt;
if (Math.floor(count) !== count) {
count = Math.ceil(count);
}
if (node.stream !== true) {
msg.parts.count = count;
node.c = 0;
}
var pos = 0;
var data = msg.payload;
for (var i=0; i<count-1; i++) {
msg.payload = data.substring(pos,pos+node.splt);
msg.parts.index = node.c++;
pos += node.splt;
send(RED.util.cloneMessage(msg));
}
if (count > 1) {
node.pendingDones.forEach(d => d());
node.pendingDones = [];
}
node.remainder = data.substring(pos);
if ((node.stream !== true) || (node.remainder.length === node.splt)) {
msg.payload = node.remainder;
msg.parts.index = node.c++;
send(RED.util.cloneMessage(msg));
node.pendingDones.forEach(d => d());
node.pendingDones = [];
done();
node.remainder = "";
} else {
node.pendingDones.push(done);
}
}
else {
var a = [];
if (node.spltType === "bin") {
if (!node.spltBufferString) {
node.spltBufferString = node.splt.toString();
}
a = msg.payload.split(node.spltBufferString);
msg.parts.ch = node.spltBuffer; // pass the split char to other end for rejoin
} else if (node.spltType === "str") {
a = msg.payload.split(node.splt);
msg.parts.ch = node.splt; // pass the split char to other end for rejoin
}
sendArray(node,msg,a,send);
done();
}
}
else if (Array.isArray(msg.payload)) { // then split array into messages
msg.parts.type = "array";
var count = msg.payload.length/node.arraySplt;
if (Math.floor(count) !== count) {
count = Math.ceil(count);
}
msg.parts.count = count;
var pos = 0;
var data = msg.payload;
msg.parts.len = node.arraySplt;
for (var i=0; i<count; i++) {
msg.payload = data.slice(pos,pos+node.arraySplt);
if (node.arraySplt === 1) {
msg.payload = msg.payload[0];
}
msg.parts.index = i;
pos += node.arraySplt;
send(RED.util.cloneMessage(msg));
}
done();
}
else if ((typeof msg.payload === "object") && !Buffer.isBuffer(msg.payload)) {
var j = 0;
var l = Object.keys(msg.payload).length;
var pay = msg.payload;
msg.parts.type = "object";
for (var p in pay) {
if (pay.hasOwnProperty(p)) {
msg.payload = pay[p];
if (node.addname !== "") {
msg[node.addname] = p;
}
msg.parts.key = p;
msg.parts.index = j;
msg.parts.count = l;
send(RED.util.cloneMessage(msg));
j += 1;
}
}
done();
}
else if (Buffer.isBuffer(msg.payload)) {
var len = node.buffer.length + msg.payload.length;
var buff = Buffer.concat([node.buffer, msg.payload], len);
msg.parts.type = "buffer";
if (node.spltType === "len") {
var count = buff.length/node.splt;
if (Math.floor(count) !== count) {
count = Math.ceil(count);
}
if (node.stream !== true) {
msg.parts.count = count;
node.c = 0;
}
var pos = 0;
msg.parts.len = node.splt;
for (var i=0; i<count-1; i++) {
msg.payload = buff.slice(pos,pos+node.splt);
msg.parts.index = node.c++;
pos += node.splt;
send(RED.util.cloneMessage(msg));
}
if (count > 1) {
node.pendingDones.forEach(d => d());
node.pendingDones = [];
}
node.buffer = buff.slice(pos);
if ((node.stream !== true) || (node.buffer.length === node.splt)) {
msg.payload = node.buffer;
msg.parts.index = node.c++;
send(RED.util.cloneMessage(msg));
node.pendingDones.forEach(d => d());
node.pendingDones = [];
done();
node.buffer = Buffer.from([]);
} else {
node.pendingDones.push(done);
}
}
else {
var count = 0;
if (node.spltType === "bin") {
msg.parts.ch = node.spltBuffer;
} else if (node.spltType === "str") {
msg.parts.ch = node.splt;
}
var pos = buff.indexOf(node.splt);
var end;
while (pos > -1) {
count++;
end = pos+node.splt.length;
pos = buff.indexOf(node.splt,end);
}
count++;
if (node.stream !== true) {
msg.parts.count = count;
node.c = 0;
}
var i = 0, p = 0;
pos = buff.indexOf(node.splt);
while (pos > -1) {
msg.payload = buff.slice(p,pos);
msg.parts.index = node.c++;
send(RED.util.cloneMessage(msg));
i++;
p = pos+node.splt.length;
pos = buff.indexOf(node.splt,p);
}
if (count > 1) {
node.pendingDones.forEach(d => d());
node.pendingDones = [];
}
if ((node.stream !== true) && (p < buff.length)) {
msg.payload = buff.slice(p,buff.length);
msg.parts.index = node.c++;
msg.parts.count = node.c++;
send(RED.util.cloneMessage(msg));
node.pendingDones.forEach(d => d());
node.pendingDones = [];
}
else {
node.buffer = buff.slice(p,buff.length);
node.pendingDones.push(done);
}
if (node.buffer.length == 0) {
done();
}
}
} else { // otherwise drop the message.
done();
}
}
});
}
RED.nodes.registerType("split",SplitNode);
var _maxKeptMsgsCount;
function maxKeptMsgsCount(node) {
if (_maxKeptMsgsCount === undefined) {
var name = "nodeMessageBufferMaxLength";
if (RED.settings.hasOwnProperty(name)) {
_maxKeptMsgsCount = RED.settings[name];
}
else {
_maxKeptMsgsCount = 0;
}
}
return _maxKeptMsgsCount;
}
function applyReduce(exp, accum, msg, index, count, done) {
exp.assign("I", index);
exp.assign("N", count);
exp.assign("A", accum);
RED.util.evaluateJSONataExpression(exp, msg, done);
}
function exp_or_undefined(exp) {
if((exp === "") ||
(exp === null)) {
return undefined;
}
return exp
}
function reduceMessageGroup(node,msgInfos,exp,fixup,count,accumulator,done) {
var msgInfo = msgInfos.shift();
exp.assign("I", msgInfo.msg.parts.index);
exp.assign("N", count);
exp.assign("A", accumulator);
RED.util.evaluateJSONataExpression(exp, msgInfo.msg, (err,result) => {
if (err) {
return done(err);
}
if (msgInfos.length === 0) {
if (fixup) {
fixup.assign("N", count);
fixup.assign("A", result);
RED.util.evaluateJSONataExpression(fixup, {}, (err, result) => {
if (err) {
return done(err);
}
msgInfo.send({payload: result});
done();
});
} else {
msgInfo.send({payload: result});
done();
}
} else {
reduceMessageGroup(node,msgInfos,exp,fixup,count,result,done);
}
});
}
function reduceAndSendGroup(node, group, done) {
var is_right = node.reduce_right;
var flag = is_right ? -1 : 1;
var msgInfos = group.msgs;
const preservedMsgInfos = [...msgInfos];
try {
RED.util.evaluateNodeProperty(node.exp_init, node.exp_init_type, node, {}, (err,accum) => {
var reduceExpression = node.reduceExpression;
var fixupExpression = node.fixupExpression;
var count = group.count;
msgInfos.sort(function(x,y) {
var ix = x.msg.parts.index;
var iy = y.msg.parts.index;
if (ix < iy) {return -flag;}
if (ix > iy) {return flag;}
return 0;
});
reduceMessageGroup(node, msgInfos,reduceExpression,fixupExpression,count,accum,(err,result) => {
if (err) {
preservedMsgInfos.pop(); // omit last message to emit error message
preservedMsgInfos.forEach(mInfo => mInfo.done());
done(err);
return;
} else {
preservedMsgInfos.forEach(mInfo => mInfo.done());
done();
}
})
});
} catch(err) {
done(new Error(RED._("join.errors.invalid-expr",{error:err.message})));
}
}
function reduceMessage(node, msgInfo, done) {
let msg = msgInfo.msg;
if (msg.hasOwnProperty('parts')) {
var parts = msg.parts;
var pending = node.pending;
var pending_count = node.pending_count;
var gid = msg.parts.id;
var count;
if (!pending.hasOwnProperty(gid)) {
if(parts.hasOwnProperty('count')) {
count = msg.parts.count;
}
pending[gid] = {
count: count,
msgs: []
};
}
var group = pending[gid];
var msgs = group.msgs;
if (parts.hasOwnProperty('count') && (group.count === undefined)) {
group.count = parts.count;
}
msgs.push(msgInfo);
pending_count++;
var completeProcess = function(err) {
if (err) {
return done(err);
}
node.pending_count = pending_count;
var max_msgs = maxKeptMsgsCount(node);
if ((max_msgs > 0) && (pending_count > max_msgs)) {
Object.values(node.pending).forEach(group => {
group.msgs.forEach(mInfo => {
if (mInfo.msg._msgid !== msgInfo.msg._msgid) {
mInfo.done();
}
});
});
node.pending = {};
node.pending_count = 0;
done(RED._("join.too-many"));
return;
}
return done();
}
if (msgs.length === group.count) {
delete pending[gid];
pending_count -= msgs.length;
reduceAndSendGroup(node, group, completeProcess)
} else {
completeProcess();
}
} else {
msgInfo.send(msg);
msgInfo.done();
done();
}
}
function JoinNode(n) {
RED.nodes.createNode(this,n);
this.mode = n.mode||"auto";
this.property = n.property||"payload";
this.propertyType = n.propertyType||"msg";
if (this.propertyType === 'full') {
this.property = "payload";
}
this.key = n.key||"topic";
this.timer = (this.mode === "auto") ? 0 : Number(n.timeout || 0)*1000;
this.count = Number(n.count || 0);
this.joiner = n.joiner||"";
this.joinerType = n.joinerType||"str";
this.reduce = (this.mode === "reduce");
if (this.reduce) {
this.exp_init = n.reduceInit;
this.exp_init_type = n.reduceInitType;
var exp_reduce = n.reduceExp;
var exp_fixup = exp_or_undefined(n.reduceFixup);
this.reduce_right = n.reduceRight;
try {
this.reduceExpression = RED.util.prepareJSONataExpression(exp_reduce, this);
this.fixupExpression = (exp_fixup !== undefined) ? RED.util.prepareJSONataExpression(exp_fixup, this) : undefined;
} catch(e) {
this.error(RED._("join.errors.invalid-expr",{error:e.message}));
return;
}
}
if (this.joinerType === "str") {
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");
} else if (this.joinerType === "bin") {
var joinArray = JSON.parse(n.joiner || "[]");
if (Array.isArray(joinArray)) {
this.joiner = Buffer.from(joinArray);
} else {
throw new Error("not an array");
}
}
this.build = n.build || "array";
this.accumulate = n.accumulate || "false";
this.output = n.output || "stream";
this.pending = {};
this.pending_count = 0;
//this.topic = n.topic;
var node = this;
var inflight = {};
var completeSend = function(partId) {
var group = inflight[partId];
if (group.timeout) { clearTimeout(group.timeout); }
if ((node.accumulate !== true) || group.msg.hasOwnProperty("complete")) { delete inflight[partId]; }
if (group.type === 'array' && group.arrayLen > 1) {
var newArray = [];
group.payload.forEach(function(n) {
newArray = newArray.concat(n);
})
group.payload = newArray;
}
else if (group.type === 'buffer') {
var buffers = [];
var bufferLen = 0;
if (group.joinChar !== undefined) {
var joinBuffer = Buffer.from(group.joinChar);
for (var i=0; i<group.payload.length; i++) {
if (i > 0) {
buffers.push(joinBuffer);
bufferLen += joinBuffer.length;
}
if (!Buffer.isBuffer(group.payload[i])) {
group.payload[i] = Buffer.from(group.payload[i]);
}
buffers.push(group.payload[i]);
bufferLen += group.payload[i].length;
}
}
else {
bufferLen = group.bufferLen;
buffers = group.payload;
}
group.payload = Buffer.concat(buffers,bufferLen);
}
if (group.type === 'string') {
var groupJoinChar = group.joinChar;
if (typeof group.joinChar !== 'string') {
groupJoinChar = group.joinChar.toString();
}
RED.util.setMessageProperty(group.msg,node.property,group.payload.join(groupJoinChar));
}
else {
if (node.propertyType === 'full') {
group.msg = RED.util.cloneMessage(group.msg);
}
RED.util.setMessageProperty(group.msg,node.property,group.payload);
}
if (group.msg.hasOwnProperty('parts') && group.msg.parts.hasOwnProperty('parts')) {
group.msg.parts = group.msg.parts.parts;
}
else {
delete group.msg.parts;
}
delete group.msg.complete;
group.send(RED.util.cloneMessage(group.msg));
group.dones.forEach(f => f());
group.dones = [];
}
var pendingMessages = [];
var activeMessage = null;
// In reduce mode, we must process messages fully in order otherwise
// 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(msgInfo) {
if (msgInfo) {
// A new message has arrived - add it to the message queue
pendingMessages.push(msgInfo);
if (activeMessage !== 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
activeMessage = 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 nextMsgInfo = pendingMessages.shift();
activeMessage = true;
reduceMessage(node, nextMsgInfo, err => {
if (err) {
nextMsgInfo.done(err);//.error(err,nextMsg);
}
activeMessage = null;
processReduceMessageQueue();
})
}
this.on("input", function(msg, send, done) {
try {
var property;
var partId = "_";
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");
done();
return;
}
}
if (node.mode === 'auto' && (!msg.hasOwnProperty("parts")||!msg.parts.hasOwnProperty("id"))) {
// if a blank reset messag erest it all.
if (msg.hasOwnProperty("reset")) {
if (inflight && inflight.hasOwnProperty("partId") && inflight[partId].timeout) {
clearTimeout(inflight[partId].timeout);
}
inflight = {};
}
else {
node.warn("Message missing msg.parts property - cannot join in 'auto' mode")
}
done();
return;
}
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, send, done});
}
else {
// Use the node configuration to identify all of the group information
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 (msg.hasOwnProperty("restartTimeout")) {
if (inflight[partId]) {
if (inflight[partId].timeout) {
clearTimeout(inflight[partId].timeout);
}
if (node.timer > 0) {
inflight[partId].timeout = setTimeout(function() {
completeSend(partId)
}, node.timer)
}
}
}
if (msg.hasOwnProperty("reset")) {
if (inflight[partId]) {
if (inflight[partId].timeout) {
clearTimeout(inflight[partId].timeout);
}
inflight[partId].dones.forEach(f => f());
delete inflight[partId]
}
done();
return;
}
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;
inflight[partId].send = send;
completeSend(partId);
}
}
else {
node.warn("Message missing key property 'msg."+node.key+"' - cannot add to object")
}
}
done();
return;
}
if (!inflight.hasOwnProperty(partId)) {
if (payloadType === 'object' || payloadType === 'merged') {
inflight[partId] = {
currentCount:0,
payload:{},
targetCount:targetCount,
type:"object",
msg:RED.util.cloneMessage(msg),
send: send,
dones: []
};
}
else {
inflight[partId] = {
currentCount:0,
payload:[],
targetCount:targetCount,
type:payloadType,
msg:RED.util.cloneMessage(msg),
send: send,
dones: []
};
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)
}
}
inflight[partId].dones.push(done);
var group = inflight[partId];
if (payloadType === 'buffer') {
if (property !== undefined) {
if (Buffer.isBuffer(property) || (typeof property === "string") || Array.isArray(property)) {
inflight[partId].bufferLen += property.length;
}
else {
done(RED._("join.errors.invalid-type",{error:(typeof property)}));
return;
}
}
}
if (payloadType === 'object') {
group.payload[propertyKey] = property;
group.currentCount = Object.keys(group.payload).length;
} 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)) {
if (group.payload[propertyIndex] == undefined) { group.currentCount++; }
group.payload[propertyIndex] = property;
} else {
if (property !== undefined) {
group.payload.push(property);
group.currentCount++;
}
}
}
group.msg = Object.assign(group.msg, msg);
group.send = send;
var tcnt = group.targetCount;
if (msg.hasOwnProperty("parts")) {
tcnt = group.targetCount || msg.parts.count;
group.targetCount = tcnt;
}
if ((tcnt > 0 && group.currentCount >= tcnt) || msg.hasOwnProperty('complete')) {
completeSend(partId);
}
}
catch(err) {
done(err);
console.log(err.stack);
}
});
this.on("close", function() {
for (var i in inflight) {
if (inflight.hasOwnProperty(i)) {
clearTimeout(inflight[i].timeout);
inflight[i].dones.forEach(d => d());
}
}
});
}
RED.nodes.registerType("join",JoinNode);
}
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