node-query/lib/adapters/Sqlite/dblite.js

68 lines
1.5 KiB
JavaScript

'use strict';
const Adapter = require('../../Adapter');
const Result = require('../../Result');
const helpers = require('../../helpers');
const dbliteAdapter = require('dblite');
class SqliteDblite extends Adapter {
constructor (config) {
let file = (helpers.isString(config)) ? config : config.file;
const instance = new Promise((resolve, reject) => {
let conn = dbliteAdapter(file);
// Stop the stupid 'bye bye' message being output
conn.on('close', () => {});
conn.on('error', err => {
reject(err);
});
// Make sure to actually pass on the connection!
return resolve(conn);
});
super(instance);
}
/**
* Run the sql query as a prepared statement
*
* @param {String} sql - The sql with placeholders
* @param {Array} params - The values to insert into the query
* @return {Promise} - Returns a promise if no callback is provided
*/
execute (sql, params) {
return this.instance.then(conn => new Promise((resolve, reject) => {
return conn.query(sql, params, (err, rows) => {
if (err) {
return reject(err);
}
return resolve(this.transformResult(rows));
});
}));
}
/**
* Transform the adapter's result into a standard format
*
* @param {*} originalResult - the original result object from the driver
* @return {Result} - the new result object
*/
transformResult (originalResult) {
return new Result(originalResult);
}
/**
* Close the current database connection
*
* @return {void}
*/
close () {
this.instance.then(conn => conn.close());
}
}
module.exports = SqliteDblite;