84 lines
2.1 KiB
JavaScript
Executable File
84 lines
2.1 KiB
JavaScript
Executable File
'use strict';
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const QueryBuilder = require('./QueryBuilder');
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// Map config driver name to code class name
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const dbDriverMap = new Map([
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['my', 'Mysql'],
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['mysql', 'Mysql'],
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['maria', 'Mysql'],
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['mariadb', 'Mysql'],
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['firebird', 'Firebird'],
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['postgresql', 'Pg'],
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['postgres', 'Pg'],
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['pg', 'Pg'],
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['sqlite3', 'Sqlite'],
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['sqlite', 'Sqlite'],
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['sqlserver', 'MSSQLServer'],
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['mssql', 'MSSQLServer']
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]);
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/**
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* Class for connection management
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*
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* @param {object} config - connection parameters
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*/
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class NodeQuery {
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/**
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* Constructor
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*
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* @param {object} config - connection parameters
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* @param {string} config.driver - the database driver to use, such as mysql, sqlite, mssql, or pgsql
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* @param {object|string} config.connection - the connection options for the database
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* @param {string} config.connection.host - the ip or hostname of the database server
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* @param {string} config.connection.user - the user to log in as
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* @param {string} config.connection.password - the password to log in with
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* @param {string} config.connection.database - the name of the database to connect to
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* @example let nodeQuery = require('ci-node-query')({
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* driver: 'mysql',
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* connection: {
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* host: 'localhost',
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* user: 'root',
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* password: '',
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* database: 'mysql'
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* }
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* });
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* @example let nodeQuery = require('ci-node-query')({
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* driver: 'sqlite',
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* connection: ':memory:'
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* });
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*/
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constructor (config) {
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this.instance = null;
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if (config !== undefined) {
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let drivername = dbDriverMap.get(config.driver);
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if (!drivername) {
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throw new Error(`Selected driver (${config.driver}) does not exist!`);
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}
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const driver = require(`./drivers/${drivername}`);
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const Adapter = require(`./adapters/${drivername}`);
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let adapter = Adapter(config);
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this.instance = new QueryBuilder(driver, adapter);
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}
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}
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/**
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* Return an existing query builder instance
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*
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* @return {QueryBuilder} - The Query Builder object
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*/
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getQuery () {
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if (this.instance == null) {
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throw new Error('No Query Builder instance to return');
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}
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return this.instance;
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}
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}
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module.exports = config => new NodeQuery(config);
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