2014-10-08 19:44:14 -04:00
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"use strict";
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2014-10-23 10:53:16 -04:00
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/** @module node-query */
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var nodeQuery = {};
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2014-10-08 19:44:14 -04:00
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2014-11-03 10:59:18 -05:00
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var instance = null;
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2014-10-23 10:53:16 -04:00
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/**
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* Create a query builder object
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*
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* @alias module:node-query
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* @param {String} drivername - The name of the database type, eg. mysql or pg
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* @param {Object} connObject - A connection object from the database library you are connecting with
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* @param {String} connLib - The name of the db connection library you are using, eg. mysql or mysql2
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* @return {queryBuilder}
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*/
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nodeQuery.init = function (driverType, connObject, connLib) {
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var fs = require('fs'),
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qb = require('./query-builder');
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2014-10-20 16:56:45 -04:00
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2014-10-23 10:53:16 -04:00
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var paths = {
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driver: __dirname + '/drivers/' + driverType + '.js',
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adapter: __dirname + '/adapters/' + connLib + '.js'
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2014-10-20 16:56:45 -04:00
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};
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2014-10-23 10:53:16 -04:00
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Object.keys(paths).forEach(function(type) {
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if ( ! fs.existsSync(paths[type]))
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{
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console.log(paths[type]);
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throw new Error('Selected ' + type + ' does not exist!');
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}
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});
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2014-11-03 10:59:18 -05:00
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instance = qb(require(paths.driver), require(paths.adapter)(connObject));
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return instance;
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2014-10-23 10:53:16 -04:00
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};
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2014-11-03 10:59:18 -05:00
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/**
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* Return an existing query builder instance
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*
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* @return {queryBuilder}
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*/
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nodeQuery.getQuery = function () {
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if ( ! instance) {
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throw new Error("No Query Builder instance to return");
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}
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return instance;
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};
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2014-10-23 10:53:16 -04:00
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2014-11-03 10:59:18 -05:00
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module.exports = nodeQuery;
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