<?php
/**
 * Copyright (c) 2013 Bart Visscher <bartv@thisnet.nl>
 * This file is licensed under the Affero General Public License version 3 or
 * later.
 * See the COPYING-README file.
 */


namespace OC\DB;

class AdapterSqlite extends Adapter {
	public function fixupStatement($statement) {
		$statement = preg_replace('/`(\w+)` ILIKE \?/', 'LOWER($1) LIKE LOWER(?)', $statement);
		$statement = str_replace( '`', '"', $statement );
		$statement = str_ireplace( 'NOW()', 'datetime(\'now\')', $statement );
		$statement = str_ireplace( 'UNIX_TIMESTAMP()', 'strftime(\'%s\',\'now\')', $statement );
		return $statement;
	}

	public function insertIfNotExist($table, $input) {
		$fieldList = '`' . implode('`,`', array_keys($input)) . '`';
		$query = "INSERT INTO `$table` ($fieldList) SELECT "
			. str_repeat('?,', count($input)-1).'? '
			. " WHERE NOT EXISTS (SELECT 1 FROM `$table` WHERE ";

		$inserts = array_values($input);
		foreach($input as $key => $value) {
			$query .= '`' . $key . '`';
			if (is_null($value)) {
				$query .= ' IS NULL AND ';
			} else {
				$inserts[] = $value;
				$query .= ' = ? AND ';
			}
		}
		$query = substr($query, 0, strlen($query) - 5);
		$query .= ')';

		try {
			return $this->conn->executeUpdate($query, $inserts);
		} catch(\Doctrine\DBAL\DBALException $e) {
			$entry = 'DB Error: "'.$e->getMessage() . '"<br />';
			$entry .= 'Offending command was: ' . $query.'<br />';
			\OC_Log::write('core', $entry, \OC_Log::FATAL);
			$l = \OC::$server->getL10N('lib');
			throw new \OC\HintException(
				$l->t('Database Error'),
				$l->t('Please contact your system administrator.'),
				0,
				$e
			);
		}
	}
}