<?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 = 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) {
  		// NOTE: For SQLite we have to use this clumsy approach
  		// otherwise all fieldnames used must have a unique key.
  		$query = 'SELECT COUNT(*) FROM `' . $table . '` WHERE ';
  		foreach($input as $key => $value) {
  			$query .= '`' . $key . '` = ? AND ';
  		}
  		$query = substr($query, 0, strlen($query) - 5);
  		try {
  			$stmt = $this->conn->prepare($query);
  			$result = $stmt->execute(array_values($input));
  		} catch(\Doctrine\DBAL\DBALException $e) {
  			$entry = 'DB Error: "'.$e->getMessage() . '"<br />';
  			$entry .= 'Offending command was: ' . $query . '<br />';
  			\OC_Log::write('core', $entry, \OC_Log::FATAL);
  			error_log('DB error: '.$entry);
  			\OC_Template::printErrorPage( $entry );
  		}
  
  		if ($stmt->fetchColumn() === '0') {
  			$query = 'INSERT INTO `' . $table . '` (`'
  				. implode('`,`', array_keys($input)) . '`) VALUES('
  				. str_repeat('?,', count($input)-1).'? ' . ')';
  		} else {
  			return 0; //no rows updated
  		}
  
  		try {
  			$statement = $this->conn->prepare($query);
  			$result = $statement->execute(array_values($input));
  		} 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);
  			error_log('DB error: ' . $entry);
  			\OC_Template::printErrorPage( $entry );
  		}
  
  		return $result;
  	}
  }