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node-red-nodes/storage/mysql/68-mysql.js

109 lines
3.2 KiB
JavaScript

/**
* 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");
var mysqldb = require('mysql');
function MySQLNode(n) {
RED.nodes.createNode(this,n);
this.host = n.host;
this.port = n.port;
this.user = n.user;
this.password = n.pass;
this.dbname = n.db;
var node = this;
node.connection = mysqldb.createConnection({
host : node.host,
port : node.port,
user : node.user,
password : node.password,
database : node.dbname
});
node.connection.connect(function(err) {
if (err) node.error(err);
});
node.on('close', function () {
node.connection.end(function(err) {
if (err) node.error(err);
});
});
}
RED.nodes.registerType("MySQLdatabase",MySQLNode);
function MysqlDBNodeIn(n) {
RED.nodes.createNode(this,n);
this.mydb = n.mydb;
this.mydbConfig = RED.nodes.getNode(this.mydb);
if (this.mydbConfig) {
var node = this;
node.on("input", function(msg) {
if (typeof msg.topic === 'string') {
//console.log("query:",msg.topic);
node.mydbConfig.connection.query(msg.topic, function(err, rows) {
if (err) { node.warn(err); }
else {
msg.payload = rows;
node.send(msg);
}
});
}
else {
if (typeof msg.topic !== 'string') node.error("msg.topic : the query is not defined as a string");
}
});
}
else {
this.error("MySQL database not configured");
}
}
RED.nodes.registerType("mysql",MysqlDBNodeIn);
//function MysqlDBNodeOut(n) {
//RED.nodes.createNode(this,n);
//this.level = n.level;
//this.operation = n.operation;
//this.levelConfig = RED.nodes.getNode(this.level);
//if (this.levelConfig) {
//var node = this;
//node.on("input", function(msg) {
//if (typeof msg.topic === 'string') {
//if (node.operation === "delete") {
//node.levelConfig.db.del(msg.topic);
//}
//else {
//node.levelConfig.db.put(msg.topic, msg.payload, function(err) {
//if (err) node.error(err);
//});
//}
//}
//else {
//if (typeof msg.topic !== 'string') node.error("msg.topic : the key is not defined");
//}
//});
//}
//else {
//this.error("MySQL database not configured");
//}
//}
//RED.nodes.registerType("mysql out",MysqlDBNodeOut);