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

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/**
* Copyright 2013 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.
**/
var RED = require(process.env.NODE_RED_HOME+"/red/red");
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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;
var credentials = RED.nodes.getCredentials(n.id);
if (credentials) {
this.username = credentials.user;
this.password = credentials.password;
}
var url = "mongodb://";
if (this.username && this.password) {
url += this.username+":"+this.password+"@";
}
url += this.hostname+":"+this.port+"/"+this.db;
this.url = url;
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}
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RED.nodes.registerType("mongodb",MongoNode);
var querystring = require('querystring');
RED.httpAdmin.get('/mongodb/:id',function(req,res) {
var credentials = RED.nodes.getCredentials(req.params.id);
if (credentials) {
res.send(JSON.stringify({user:credentials.user,hasPassword:(credentials.password&&credentials.password!="")}));
} else {
res.send(JSON.stringify({}));
}
});
RED.httpAdmin.delete('/mongodb/:id',function(req,res) {
RED.nodes.deleteCredentials(req.params.id);
res.send(200);
});
RED.httpAdmin.post('/mongodb/:id',function(req,res) {
var body = "";
req.on('data', function(chunk) {
body+=chunk;
});
req.on('end', function(){
var newCreds = querystring.parse(body);
var credentials = RED.nodes.getCredentials(req.params.id)||{};
if (newCreds.user == null || newCreds.user == "") {
delete credentials.user;
} else {
credentials.user = newCreds.user;
}
if (newCreds.password == "") {
delete credentials.password;
} else {
credentials.password = newCreds.password||credentials.password;
}
RED.nodes.addCredentials(req.params.id,credentials);
res.send(200);
});
});
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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;
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this.mongoConfig = RED.nodes.getNode(this.mongodb);
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);}});
}
}
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");
}
this.on("close", function() {
if (this.clientDb) {
this.clientDb.close();
}
});
}
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RED.nodes.registerType("mongodb out",MongoOutNode);
function MongoInNode(n) {
RED.nodes.createNode(this,n);
this.collection = n.collection;
this.mongodb = n.mongodb;
this.mongoConfig = RED.nodes.getNode(this.mongodb);
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) {
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 {
this.error("missing mongodb configuration");
}
this.on("close", function() {
if (this.clientDb) {
this.clientDb.close();
}
});
}
RED.nodes.registerType("mongodb in",MongoInNode);