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|
<?php
namespace PicoDb\Driver;
use PDO;
use PDOException;
/**
* Mysql Driver
*
* @package PicoDb\Driver
* @author Frederic Guillot
*/
class Mysql extends Base
{
/**
* List of required settings options
*
* @access protected
* @var array
*/
protected $requiredAttributes = array(
'hostname',
'username',
'password',
'database',
);
/**
* Table to store the schema version
*
* @access private
* @var array
*/
private $schemaTable = 'schema_version';
/**
* Create a new PDO connection
*
* @access public
* @param array $settings
*/
public function createConnection(array $settings)
{
$this->pdo = new PDO(
$this->buildDsn($settings),
$settings['username'],
$settings['password'],
$this->buildOptions($settings)
);
if (isset($settings['schema_table'])) {
$this->schemaTable = $settings['schema_table'];
}
}
/**
* Build connection DSN
*
* @access protected
* @param array $settings
* @return string
*/
protected function buildDsn(array $settings)
{
$dsn = 'mysql:host='.$settings['hostname'].';dbname='.$settings['database'];
if (! empty($settings['port'])) {
$dsn .= ';port='.$settings['port'];
}
return $dsn;
}
/**
* Build connection options
*
* @access protected
* @param array $settings
* @return array
*/
protected function buildOptions(array $settings)
{
$charset = empty($settings['charset']) ? 'utf8' : $settings['charset'];
$options = array(
PDO::MYSQL_ATTR_INIT_COMMAND => 'SET sql_mode = STRICT_ALL_TABLES, NAMES ' . $charset,
);
if (! empty($settings['ssl_key'])) {
$options[PDO::MYSQL_ATTR_SSL_KEY] = $settings['ssl_key'];
}
if (! empty($settings['ssl_cert'])) {
$options[PDO::MYSQL_ATTR_SSL_CERT] = $settings['ssl_cert'];
}
if (! empty($settings['ssl_ca'])) {
$options[PDO::MYSQL_ATTR_SSL_CA] = $settings['ssl_ca'];
}
if (! empty($settings['persistent'])) {
$options[PDO::ATTR_PERSISTENT] = $settings['persistent'];
}
if (! empty($settings['timeout'])) {
$options[PDO::ATTR_TIMEOUT] = $settings['timeout'];
}
if (isset($settings['verify_server_cert'])) {
$options[PDO::MYSQL_ATTR_SSL_VERIFY_SERVER_CERT] = $settings['verify_server_cert'];
}
if (! empty($settings['case'])) {
$options[PDO::ATTR_CASE] = $settings['case'];
}
return $options;
}
/**
* Enable foreign keys
*
* @access public
*/
public function enableForeignKeys()
{
$this->pdo->exec('SET FOREIGN_KEY_CHECKS=1');
}
/**
* Disable foreign keys
*
* @access public
*/
public function disableForeignKeys()
{
$this->pdo->exec('SET FOREIGN_KEY_CHECKS=0');
}
/**
* Return true if the error code is a duplicate key
*
* @access public
* @param integer $code
* @return boolean
*/
public function isDuplicateKeyError($code)
{
return $code == 23000;
}
/**
* Escape identifier
*
* @access public
* @param string $identifier
* @return string
*/
public function escape($identifier)
{
return '`'.$identifier.'`';
}
/**
* Get non standard operator
*
* @access public
* @param string $operator
* @return string
*/
public function getOperator($operator)
{
if ($operator === 'LIKE') {
return 'LIKE BINARY';
}
else if ($operator === 'ILIKE') {
return 'LIKE';
}
return '';
}
/**
* Get last inserted id
*
* @access public
* @return integer
*/
public function getLastId()
{
return $this->pdo->lastInsertId();
}
/**
* Get current schema version
*
* @access public
* @return integer
*/
public function getSchemaVersion()
{
$this->pdo->exec("CREATE TABLE IF NOT EXISTS `".$this->schemaTable."` (`version` INT DEFAULT '0') ENGINE=InnoDB CHARSET=utf8");
$rq = $this->pdo->prepare('SELECT `version` FROM `'.$this->schemaTable.'`');
$rq->execute();
$result = $rq->fetchColumn();
if ($result !== false) {
return (int) $result;
}
else {
$this->pdo->exec('INSERT INTO `'.$this->schemaTable.'` VALUES(0)');
}
return 0;
}
/**
* Set current schema version
*
* @access public
* @param integer $version
*/
public function setSchemaVersion($version)
{
$rq = $this->pdo->prepare('UPDATE `'.$this->schemaTable.'` SET `version`=?');
$rq->execute(array($version));
}
/**
* Upsert for a key/value variable
*
* @access public
* @param string $table
* @param string $keyColumn
* @param string $valueColumn
* @param array $dictionary
* @return bool False on failure
*/
public function upsert($table, $keyColumn, $valueColumn, array $dictionary)
{
try {
$sql = sprintf(
'REPLACE INTO %s (%s, %s) VALUES %s',
$this->escape($table),
$this->escape($keyColumn),
$this->escape($valueColumn),
implode(', ', array_fill(0, count($dictionary), '(?, ?)'))
);
$values = array();
foreach ($dictionary as $key => $value) {
$values[] = $key;
$values[] = $value;
}
$rq = $this->pdo->prepare($sql);
$rq->execute($values);
return true;
}
catch (PDOException $e) {
return false;
}
}
}
|
