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66-mongodb.js
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module.exports = function(RED) {
"use strict";
var mongo = require('mongodb');
var ObjectID = require('mongodb').ObjectID;
var MongoClient = mongo.MongoClient;
function MongoNode(n) {
RED.nodes.createNode(this,n);
this.hostname = n.hostname;
this.port = n.port;
this.db = n.db;
this.name = n.name;
this.connectOptions= n.connectOptions;
this.topology = n.topology;
//console.log(this);
var clustered = (this.topology !== "direct") || false;
var url = "mongodb://";
if (this.topology === "dnscluster") {
url = "mongodb+srv://";
}
if (this.credentials && this.credentials.user && this.credentials.password) {
this.user = this.credentials.user;
this.password = this.credentials.password;
} else {
this.user = n.user;
this.password = n.password;
}
if (this.user) {
url += this.user+":"+this.password+"@";
}
if (clustered) {
url += this.hostname + "/" + this.db
} else {
url += this.hostname + ":" + this.port + "/" + this.db;
}
if (this.connectOptions){
url += "?" + this.connectOptions;
}
console.log("MongoDB URL: " + url);
this.url = url;
}
RED.nodes.registerType("mongodb",MongoNode,{
credentials: {
user: {type:"text"},
password: {type: "password"}
}
});
function ensureValidSelectorObject(selector) {
if (selector != null && (typeof selector != 'object' || Buffer.isBuffer(selector))) {
return {};
}
return selector;
}
function MongoOutNode(n) {
RED.nodes.createNode(this,n);
this.collection = n.collection;
this.mongodb = n.mongodb;
this.payonly = n.payonly || false;
this.upsert = n.upsert || false;
this.multi = n.multi || false;
this.operation = n.operation;
this.mongoConfig = RED.nodes.getNode(this.mongodb);
this.status({fill:"grey",shape:"ring",text:RED._("mongodb.status.connecting")});
var node = this;
var noerror = true;
var connectToDB = function() {
MongoClient.connect(node.mongoConfig.url, function(err, client) {
if (err) {
node.status({fill:"red",shape:"ring",text:RED._("mongodb.status.error")});
if (noerror) { node.error(err); }
noerror = false;
node.tout = setTimeout(connectToDB, 10000);
}
else {
node.status({fill:"green",shape:"dot",text:RED._("mongodb.status.connected")});
node.clientDb = client.db();
var db = client.db();
//console.log( db);
noerror = true;
var coll;
if (node.collection) {
coll = db.collection(node.collection);
}
node.on("input",function(msg) {
if (!node.collection) {
if (msg.collection) {
coll = db.collection(msg.collection);
}
else {
node.error(RED._("mongodb.errors.nocollection"),msg);
return;
}
}
delete msg._topic;
delete msg.collection;
if (node.operation === "store") {
storeInDb(node, msg, coll);
}
else if (node.operation === "insert") {
insertInDb(node, msg, coll);
}
else if (node.operation === "update") {
updateInDb(node, msg, coll);
}
else if (node.operation === "delete") {
deleteInDb(node, msg, coll);
}
});
}
});
}
if (node.mongoConfig) { connectToDB(); }
else { node.error(RED._("mongodb.errors.missingconfig")); }
node.on("close", function() {
node.status({});
if (node.tout) { clearTimeout(node.tout); }
if (node.clientDb) { node.clientDb.close(); }
});
}
RED.nodes.registerType("mongodb out",MongoOutNode);
function MongoInNode(n) {
RED.nodes.createNode(this,n);
this.collection = n.collection;
this.mongodb = n.mongodb;
this.payonly = n.payonly || false;
this.upsert = n.upsert || false;
this.multi = n.multi || false;
this.operation = n.operation || "find";
this.mongoConfig = RED.nodes.getNode(this.mongodb);
this.status({fill:"grey",shape:"ring",text:RED._("mongodb.status.connecting")});
var node = this;
var noerror = true;
var connectToDB = function() {
console.log("connecting: " + node.mongoConfig.url);
MongoClient.connect(node.mongoConfig.url, function(err,client) {
if (err) {
node.status({fill:"red",shape:"ring",text:RED._("mongodb.status.error")});
if (noerror) { node.error(err); }
noerror = false;
node.tout = setTimeout(connectToDB, 10000);
}
else {
node.status({fill:"green",shape:"dot",text:RED._("mongodb.status.connected")});
node.clientDb = client.db();
var db = client.db();
noerror = true;
var coll;
node.on("input", function(msg) {
if (!node.collection) {
if (msg.collection) {
coll = db.collection(msg.collection);
}
else {
node.error(RED._("mongodb.errors.nocollection"));
return;
}
}
else {
coll = db.collection(node.collection);
}
var selector;
if (node.operation === "find") {
msg.projection = msg.projection || {};
selector = ensureValidSelectorObject(msg.payload);
var limit = msg.limit;
if (typeof limit === "string" && !isNaN(limit)) {
limit = Number(limit);
} else if (typeof limit === "undefined") {
limit = 0;
}
var skip = msg.skip;
if (typeof skip === "string" && !isNaN(skip)) {
skip = Number(skip);
} else if (typeof skip === "undefined") {
skip = 0;
}
coll.find(selector).project(msg.projection).sort(msg.sort).limit(limit).skip(skip).toArray(function(err, items) {
if (err) {
node.error(err);
}
else {
msg.payload = items;
delete msg.projection;
delete msg.sort;
delete msg.limit;
delete msg.skip;
node.send(msg);
}
});
}
else if (node.operation === "count") {
selector = ensureValidSelectorObject(msg.payload);
coll.count(selector, function(err, count) {
if (err) {
node.error(err);
}
else {
msg.payload = count;
node.send(msg);
}
});
}
else if (node.operation === "aggregate") {
msg.payload = (Array.isArray(msg.payload)) ? msg.payload : [];
coll.aggregate(msg.payload, function(err, cursor) {
if (err) {
node.error(err);
}
else {
cursor.toArray(function(cursorError, cursorDocs) {
//console.log(cursorDocs);
if (cursorError) {
node.error(cursorError);
}
else {
msg.payload = cursorDocs;
node.send(msg);
}
});
}
});
}
else if (node.operation === "store") {
storeInDb(node, msg, coll);
}
else if (node.operation === "insert") {
insertInDb(node, msg, coll);
}
else if (node.operation === "update") {
updateInDb(node, msg, coll);
}
else if (node.operation === "delete") {
deleteInDb(node, msg, coll);
}
});
}
});
}
if (node.mongoConfig) { connectToDB(); }
else { node.error(RED._("mongodb.errors.missingconfig")); }
node.on("close", function() {
node.status({});
if (node.tout) { clearTimeout(node.tout); }
if (node.clientDb) { node.clientDb.close(); }
});
}
RED.nodes.registerType("mongodb in", MongoInNode);
function insertInDb(node, msg, coll) {
if (node.payonly) {
if (typeof msg.payload !== "object") {
msg.payload = { "payload": msg.payload };
}
if (msg.hasOwnProperty("_id") && !msg.payload.hasOwnProperty("_id")) {
msg.payload._id = msg._id;
}
coll.insert(msg.payload, function (err, item) {
if (err) {
node.error(err, msg);
}
else {
msg.payload = item;
node.send(msg);
}
});
}
else {
coll.insert(msg, function (err, item) {
if (err) {
node.error(err, msg);
}
else {
msg.payload = item;
node.send(msg);
}
});
}
}
function updateInDb(node, msg, coll) {
if (typeof msg.payload !== "object") {
msg.payload = { "payload": msg.payload };
}
var query = msg.query || {};
var payload = msg.payload || {};
var options = {
upsert: node.upsert,
multi: node.multi
};
if (ObjectID.isValid(msg.query._id)) {
msg.query._id = new ObjectID(msg.query._id);
}
coll.update(query, payload, options, function (err, item) {
if (err) {
node.error(err, msg);
}
else {
msg.payload = item;
node.send(msg);
}
});
}
function deleteInDb(node, msg, coll) {
coll.remove(msg.payload, function (err, items) {
if (err) {
node.error(err, msg);
}
else {
msg.payload = items;
node.send(msg);
}
});
}
function storeInDb(node, msg, coll) {
if (node.payonly) {
if (typeof msg.payload !== "object") {
msg.payload = { "payload": msg.payload };
}
if (msg.hasOwnProperty("_id") && !msg.payload.hasOwnProperty("_id")) {
msg.payload._id = msg._id;
}
coll.save(msg.payload, function (err, item) {
if (err) {
node.error(err, msg);
}
else {
msg.payload = item;
node.send(msg);
}
});
}
else {
coll.save(msg, function (err, item) {
if (err) {
node.error(err, msg);
}
else {
msg.payload = item;
node.send(msg);
}
});
}
}
}