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node-red-nodes/storage/mongodb/66-mongodb.js

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/**
* Copyright 2013,2015 IBM Corp.
*
* 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";
var mongo = require('mongodb');
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;
var url = "mongodb://";
if (this.credentials && this.credentials.user && this.credentials.password) {
url += this.credentials.user+":"+this.credentials.password+"@";
}
url += this.hostname+":"+this.port+"/"+this.db;
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._("mongodbstatus.connecting")});
var node = this;
var connectToDB = function() {
MongoClient.connect(node.mongoConfig.url, function(err, db) {
if (err) {
node.status({fill:"red",shape:"ring",text:RED._("mongodb.status.error")});
node.error(err);
node.tout = setTimeout(connectToDB(), 10000);
} else {
node.status({fill:"green",shape:"dot",text:RED._("mongodb.status.connected")});
node.clientDb = db;
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 {
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node.error(RED._("mongodb.errors.nocollection"),msg);
return;
}
}
delete msg._topic;
delete msg.collection;
if (node.operation === "store") {
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 {
coll.save(msg,function(err, item) {
if (err) {
node.error(err,msg);
}
});
}
} else if (node.operation === "insert") {
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 {
coll.insert(msg, function(err,item) {
if (err) {
node.error(err,msg);
}
});
}
} else if (node.operation === "update") {
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
};
coll.update(query, payload, options, function(err, item) {
if (err) {
node.error(err,msg);
}
});
} else if (node.operation === "delete") {
coll.remove(msg.payload, function(err, items) {
if (err) {
node.error(err,msg);
}
});
}
});
}
});
}
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.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 connectToDB = function() {
MongoClient.connect(node.mongoConfig.url, function(err,db) {
if (err) {
node.status({fill:"red",shape:"ring",text:RED._("mongodb.status.error")});
node.error(err);
node.tout = setTimeout(connectToDB(), 10000);
} else {
node.status({fill:"green",shape:"dot",text:RED._("mongodb.status.connected")});
node.clientDb = db;
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 {
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node.error(RED._("mongodb.errors.nocollection"));
return;
}
}
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);
}
var skip = msg.skip;
if (typeof skip === "string" && !isNaN(skip)) {
skip = Number(skip);
}
coll.find(selector,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, result) {
if (err) {
node.error(err);
} else {
msg.payload = result;
node.send(msg);
}
});
}
});
}
});
}
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);
}