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October 17, 2015 00:06
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var mysql = require('mysql'); | |
var _ = require('lodash'); | |
/** | |
* MySQL Wrapper | |
* | |
* Usage: | |
* get ( 'col1, col2', "db_table_name", "1=1", null, "id", "ASC", cbFunct ); | |
* insert ( 'col1, col2',"db_table_name", {const:"AAA"+ (new Date().getMilliseconds()), "popis": "popis" }); | |
* update ( 'col1, col2', "db_table_name", {const:"BBBB"}, "id IN (?)", [45,47,48] ); | |
* sql ( "SELECT * FROM db_table_name WHERE id IN (?)", [1,2,3] ); | |
* | |
* Usage 2: | |
* var DB = require('./modules/Mysql')(conf.mysql); | |
* DB.getData("*", "db_table_name", DB.print); | |
* DB.get("*", "db_table_name", DB.print); | |
* DB.insert("db_table_name", {var:"aaa", val:"bbb"}, DB.print); | |
* DB.update("db_table_name", {val:"bbb2"}, "var = ?", "aaa", DB.print); | |
* DB.get("*", "db_table_name", DB.print); | |
* DB.delete("db_table_name", "var = ?", "123", DB.print); | |
* DB.getData("*", "db_table_name", DB.print); | |
*/ | |
function MysqlWrapper(config) { | |
var pool = mysql.createPool(config); | |
return { | |
mysql: pool, | |
getCallback: function(params) { | |
var cb = function() {}; | |
if (params.length && _.isFunction(params[params.length-1])) { | |
cb = params[params.length-1]; | |
delete params[params.length-1]; | |
} | |
return cb; | |
}, | |
escapeLikeString: function(str) { | |
var escapeChars = ['\\', '_', '%']; | |
escapeChars.map(function(c) { | |
str = str.replace(c, '\\'+c); | |
}); | |
return str; | |
}, | |
getData: function() { | |
var cb = this.getCallback(arguments); | |
var args = arguments; | |
pool.getConnection(function(err, conn) { | |
if (err) { | |
throw err; | |
} else { | |
var sql = ""; | |
if (args[0]) | |
sql = "SELECT " + args[0]; | |
if (args[1]) | |
sql += " FROM " + args[1]; | |
if (args[2]) | |
sql += " WHERE " + args[2]; | |
if (args[4]) | |
sql += " ORDER BY " + args[4]; | |
if (args[4] && args[5]) | |
sql += " " + args[5]; | |
if (args[6]) | |
sql += " LIMIT " + args[6]; | |
if (config.showSQL) | |
console.log("SELECT: " + sql + " | PARAMS: " + JSON.stringify(args[3])); | |
var q = conn.query(sql, args[3], function(err, rows) { | |
if (err) | |
console.error(q.sql, err); | |
cb(err, rows || []); | |
conn.release() | |
}); | |
} | |
}); | |
}, | |
get: function() { | |
var cb = this.getCallback(arguments) | |
var args = arguments; | |
this.getData(args[0],args[1],args[2],args[3],args[4],args[5],1,function(err, res) { | |
cb && cb(err, res && res.length ? res[0]: null); | |
}); | |
}, | |
count: function() { | |
var cb = this.getCallback(arguments) | |
var args = arguments; | |
this.getData('count(*) as count',args[0],args[1],args[2],function(err, res) { | |
cb && cb(err, res && res.length ? res[0].count: 0); | |
}); | |
}, | |
insert: function() { | |
var cb = this.getCallback(arguments); | |
var args = arguments; | |
pool.getConnection(function(err, conn) { | |
if (err) { | |
throw err; | |
// cb(err) && conn && conn.release(); | |
} else { | |
where = "INSERT "; | |
if (args[2]) where += 'IGNORE '; | |
where += "INTO " + args[0] + " SET ? "; | |
if (config.showSQL) | |
console.log("INSERT: " + where + " | PARAMS: " + JSON.stringify(args[1])); | |
var q = conn.query(where, args[1], function(err, res) { | |
if (err) | |
console.error(q.sql, err); | |
conn.release(); | |
cb(err, res); | |
}); | |
} | |
}); | |
}, | |
update: function(where, values, cond, params) { | |
var cb = this.getCallback(arguments); | |
var args = arguments; | |
pool.getConnection(function(err, conn) { | |
if (err) { | |
throw err; | |
} else { | |
var sql = "UPDATE " + args[0] + " SET "; | |
var sqlVals = []; | |
var arr = []; | |
for (var j in values) { | |
if (j[0] == ".") | |
sqlVals.push(j.substr(1) + " = " + args[1][j]) | |
else { | |
sqlVals.push(j + " = ?") | |
arr.push(values[j]); | |
} | |
} | |
sql += sqlVals.join(", "); | |
if (args[2]) | |
sql += " WHERE " + args[2]; | |
if (!(args[3] instanceof Array)) | |
args[3] = [args[3]]; | |
for (var i in args[3]) | |
arr.push(args[3][i]); | |
if (config.showSQL) | |
console.log("UPDATE: " + sql + " | PARAMS: " + JSON.stringify(arr)); | |
var q = conn.query(sql, arr, function(err, res) { | |
if (err) | |
console.error(q.sql, err); | |
conn.release(); | |
cb(err, res) | |
}); | |
} | |
}); | |
}, | |
delete: function(where, cond, params) { | |
var cb = this.getCallback(arguments); | |
var args = arguments; | |
pool.getConnection(function(err, conn) { | |
if (err) { | |
throw err; | |
} else { | |
var sql = "DELETE FROM " + args[0] + " WHERE " + args[1]; | |
if (!(args[2] instanceof Array)) | |
args[2] = [args[2]]; | |
if (config.showSQL) | |
console.log("DELETE: " + sql + " | PARAMS: " + JSON.stringify(args[2])); | |
var q = conn.query(sql, args[2], function(err, res) { | |
if (err) | |
console.error(q.sql, err); | |
conn.release(); | |
cb(err, res) | |
}); | |
} | |
}); | |
}, | |
sql: function(sql, params) { | |
var cb = this.getCallback(arguments); | |
var args = arguments; | |
pool.getConnection(function(err, conn) { | |
if (err) { | |
throw err; | |
} else { | |
if (config.showSQL) | |
console.log("SQL: " + args[0] + " | PARAMS: " + JSON.stringify(args[1])); | |
var q = conn.query(sql, params, function(err, rows) { | |
if (err) | |
console.error(q.sql, err); | |
conn.release(); | |
cb(err, rows) | |
}); | |
} | |
}); | |
} | |
}; | |
}; | |
var dbConfig = { | |
user: "root", | |
password: 'toor', | |
database: 'images', | |
host: 'localhost', | |
// showSQL: true | |
}; | |
var DB = new MysqlWrapper(dbConfig); | |
DB.getData("*", "storage", function(err, res) { | |
console.log(err, res); | |
}) |
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