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

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/**
* Copyright 2013,2014 IBM Corp.
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*
* 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.
**/
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module.exports = function(RED) {
"use strict";
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var mongo = require('mongodb');
var MongoClient = mongo.MongoClient;
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function MongoNode(n) {
RED.nodes.createNode(this,n);
this.hostname = n.hostname;
this.port = n.port;
this.db = n.db;
this.name = n.name;
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var url = "mongodb://";
if (this.credentials && this.credentials.user && this.credentials.password) {
url += this.credentials.user+":"+this.credentials.password+"@";
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}
url += this.hostname+":"+this.port+"/"+this.db;
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this.url = url;
}
RED.nodes.registerType("mongodb",MongoNode,{
credentials: {
user: {type:"text"},
password: {type: "password"}
}
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});
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function MongoOutNode(n) {
RED.nodes.createNode(this,n);
this.collection = n.collection;
this.mongodb = n.mongodb;
this.payonly = n.payonly || false;
this.operation = n.operation;
this.mongoConfig = RED.nodes.getNode(this.mongodb);
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if (this.mongoConfig) {
var node = this;
MongoClient.connect(this.mongoConfig.url, function(err,db) {
if (err) {
node.error(err);
} else {
node.clientDb = db;
var coll = db.collection(node.collection);
node.on("input",function(msg) {
if (node.operation == "store") {
delete msg._topic;
if (node.payonly) {
if (typeof msg.payload !== "object") { msg.payload = {"payload":msg.payload}; }
coll.save(msg.payload,function(err,item){ if (err){node.error(err);} });
} else {
coll.save(msg,function(err,item){if (err){node.error(err);}});
}
}
else if (node.operation == "insert") {
delete msg._topic;
if (node.payonly) {
if (typeof msg.payload !== "object") { msg.payload = {"payload":msg.payload}; }
coll.insert(msg.payload,function(err,item){ if (err){node.error(err);} });
} else {
coll.insert(msg,function(err,item){if (err){node.error(err);}});
}
}
else if (node.operation == "update") {
delete msg._topic;
if (node.payonly) {
if (typeof msg.payload !== "object") { msg.payload = {"payload":msg.payload}; }
coll.update(msg.payload,function(err,item){ if (err){node.error(err);} });
} else {
coll.update(msg,function(err,item){if (err){node.error(err);}});
}
}
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if (node.operation == "delete") {
coll.remove(msg.payload, {w:1}, function(err, items){ if (err) { node.error(err); } });
}
});
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}
});
} else {
this.error("missing mongodb configuration");
}
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this.on("close", function() {
if (this.clientDb) {
this.clientDb.close();
}
});
}
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RED.nodes.registerType("mongodb out",MongoOutNode);
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function MongoInNode(n) {
RED.nodes.createNode(this,n);
this.collection = n.collection;
this.mongodb = n.mongodb;
this.operation = n.operation || "find";
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this.mongoConfig = RED.nodes.getNode(this.mongodb);
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if (this.mongoConfig) {
var node = this;
MongoClient.connect(this.mongoConfig.url, function(err,db) {
if (err) {
node.error(err);
} else {
node.clientDb = db;
var coll = db.collection(node.collection);
node.on("input",function(msg) {
if (node.operation === "find") {
msg.projection = msg.projection || {};
coll.find(msg.payload,msg.projection).sort(msg.sort).limit(msg.limit).toArray(function(err, items) {
if (err) {
node.error(err);
} else {
msg.payload = items;
delete msg.projection;
delete msg.sort;
delete msg.limit;
node.send(msg);
}
});
}
else if (node.operation === "count") {
coll.count(msg.payload, function(err, count) {
if (err) {
node.error(err);
} else {
msg.payload = count;
node.send(msg);
}
});
}
else if (node.operation === "aggregate") {
msg.payload = (msg.payload instanceof Array) ? msg.payload : [];
coll.aggregate(msg.payload, function(err, result) {
if (err) {
node.error(err);
} else {
msg.payload = result;
node.send(msg);
}
});
}
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});
}
});
} else {
this.error("missing mongodb configuration");
}
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this.on("close", function() {
if (this.clientDb) {
this.clientDb.close();
}
});
}
RED.nodes.registerType("mongodb in",MongoInNode);
}