/**
* 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 SplitNode(n) {
RED.nodes.createNode(this,n);
this.splt = (n.splt || "\\n").replace(/\\n/,"\n").replace(/\\r/,"\r").replace(/\\t/,"\t").replace(/\\e/,"\e").replace(/\\f/,"\f").replace(/\\0/,"\0");
var node = this;
this.on("input", function(msg) {
if (msg.hasOwnProperty("payload")) {
var a = msg.payload;
if (msg.hasOwnProperty("parts")) { msg.parts = { parts:msg.parts }; } // push existing parts to a stack
else { msg.parts = {}; }
msg.parts.id = msg._msgid; // use the existing _msgid by default.
if (typeof msg.payload === "string") { // Split String into array
a = msg.payload.split(node.splt);
msg.parts.ch = node.splt; // pass the split char to other end for rejoin
msg.parts.type = "string";
}
if (Array.isArray(a)) { // then split array into messages
msg.parts.type = msg.parts.type || "array"; // if it wasn't a string in the first place
for (var i = 0; i < a.length; i++) {
msg.payload = a[i];
msg.parts.index = i;
msg.parts.count = a.length;
node.send(RED.util.cloneMessage(msg));
}
}
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];
msg.parts.key = p;
msg.parts.index = j;
msg.parts.count = l;
node.send(RED.util.cloneMessage(msg));
j += 1;
}
}
}
// TODO not handling Buffers at present...
//else { } // otherwise drop the message.
}
});
}
RED.nodes.registerType("split",SplitNode);
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.timerr = n.timerr || "send";
this.count = Number(n.count || 0);
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");
this.build = n.build || "array";
var node = this;
var inflight = {};
var completeSend = function(partId) {
var group = inflight[partId];
clearTimeout(group.timeout);
delete inflight[partId];
if (group.type === 'string') {
RED.util.setMessageProperty(group.msg,node.property,group.payload.join(group.joinChar));
} else {
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;
}
node.send(group.msg);
}
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 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;
propertyIndex = msg.parts.index;
} else {
// Use the node configuration to identify all of the group information
partId = "_";
payloadType = node.build;
targetCount = node.count;
joinChar = node.joiner;
if (targetCount === 0 && 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 {
node.warn("Message missing key property 'msg."+node.key+"' '- cannot add to object")
}
return;
}
if (!inflight.hasOwnProperty(partId)) {
if (payloadType === 'object' || payloadType === 'merged') {
inflight[partId] = {
currentCount:0,
payload:{},
targetCount:targetCount,
type:"object",
msg:msg
};
} else {
inflight[partId] = {
currentCount:0,
payload:[],
targetCount:targetCount,
type:payloadType,
joinChar: joinChar,
msg:msg
};
if (payloadType === 'string') {
inflight[partId].joinChar = joinChar;
}
}
if (node.timer > 0) {
inflight[partId].timeout = setTimeout(function() {
completeSend(partId)
}, node.timer)
}
}
var group = inflight[partId];
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') {
node.warn("Cannot merge non-object types");
} else {
for (propertyKey in property) {
if (property.hasOwnProperty(propertyKey)) {
group.payload[propertyKey] = property[propertyKey];
}
}
group.currentCount++;
}
} else {
if (!isNaN(propertyIndex)) {
group.payload[propertyIndex] = property;
} else {
group.payload.push(property);
}
group.currentCount++;
}
// TODO: currently reuse the last received - add option to pick first received
group.msg = msg;
if (group.currentCount === group.targetCount || msg.hasOwnProperty('complete')) {
delete msg.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);
}