mirror of
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347 lines
8.5 KiB
PHP
347 lines
8.5 KiB
PHP
<?php
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/**#@+
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* @version 0.0.1
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*/
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/**
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* @package POT
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* @version 0.1.3
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* @author Wrzasq <wrzasq@gmail.com>
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* @copyright 2007 (C) by Wrzasq
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* @license http://www.gnu.org/licenses/lgpl-3.0.txt GNU Lesser General Public License, Version 3
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*/
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use MyAAC\Cache\Cache;
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/**
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* MySQL connection interface.
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*
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* <p>
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* At all everything that you really need to read from this class documentation is list of parameters for driver's constructor.
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* </p>
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*
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* @package POT
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* @version 0.1.3
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*/
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class OTS_DB_MySQL extends OTS_Base_DB
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{
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private array $has_table_cache = [];
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private array $has_column_cache = [];
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private array $get_column_info_cache = [];
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private bool $clearCacheAfter = false;
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/**
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* Creates database connection.
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*
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* <p>
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* Connects to MySQL database on given arguments.
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* </p>
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*
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* <p>
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* List of parameters for this drivers:
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* </p>
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*
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* <ul>
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* <li><var>host</var> - database server.</li>
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* <li><var>port</var> - port (optional, also it is possible to use host:port in <var>host</var> parameter).</li>
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* <li><var>database</var> - database name.</li>
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* <li><var>user</var> - user login.</li>
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* <li><var>password</var> - user password.</li>
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* </ul>
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*
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* @version 0.0.6
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* @param array $params Connection parameters.
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* @throws PDOException On PDO operation error.
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*/
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public function __construct($params)
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{
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$user = null;
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$password = null;
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$dns = array();
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// host:port support
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if( strpos(':', $params['host']) !== false)
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{
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$host = explode(':', $params['host'], 2);
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$params['host'] = $host[0];
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$params['port'] = $host[1];
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}
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if( isset($params['database']) )
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{
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$dns[] = 'dbname=' . $params['database'];
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}
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if( isset($params['user']) )
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{
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$user = $params['user'];
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}
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if( isset($params['password']) )
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{
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$password = $params['password'];
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}
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if( isset($params['prefix']) )
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{
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$this->prefix = $params['prefix'];
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}
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if( isset($params['log']) && $params['log'] )
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{
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$this->logged = true;
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}
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if( !isset($params['persistent']) ) {
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$params['persistent'] = false;
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}
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global $config;
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$cache = Cache::getInstance();
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if($cache->enabled()) {
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$tmp = null;
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$need_revalidation = true;
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if($cache->fetch('database_checksum', $tmp) && $tmp) {
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$tmp = unserialize($tmp);
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if(sha1($config['database_host'] . '.' . $config['database_name']) === $tmp) {
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$need_revalidation = false;
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}
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}
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if(!$need_revalidation) {
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$tmp = null;
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if($cache->fetch('database_tables', $tmp) && $tmp) {
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$this->has_table_cache = unserialize($tmp);
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}
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$tmp = null;
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if($cache->fetch('database_columns', $tmp) && $tmp) {
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$this->has_column_cache = unserialize($tmp);
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}
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$tmp = null;
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if($cache->fetch('database_columns_info', $tmp) && $tmp) {
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$this->get_column_info_cache = unserialize($tmp);
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}
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}
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}
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$driverAttributes = []; // debugbar dont like persistent connection
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if (config('env') !== 'dev' && !getBoolean(config('enable_debugbar'))) {
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$driverAttributes[PDO::ATTR_PERSISTENT] = $params['persistent'];
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}
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if(isset($params['socket'][0])) {
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$dns[] = 'unix_socket=' . $params['socket'];
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parent::__construct('mysql:' . implode(';', $dns), $user, $password, $driverAttributes);
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return;
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}
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if( isset($params['host']) ) {
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$dns[] = 'host=' . $params['host'];
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}
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if( isset($params['port']) ) {
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$dns[] = 'port=' . $params['port'];
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}
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parent::__construct('mysql:' . implode(';', $dns), $user, $password, $driverAttributes);
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}
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public function __destruct()
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{
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global $config;
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$cache = Cache::getInstance();
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if($cache->enabled()) {
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if ($this->clearCacheAfter) {
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$cache->delete('database_tables');
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$cache->delete('database_columns');
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$cache->delete('database_columns_info');
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$cache->delete('database_checksum');
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}
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else {
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$cache->set('database_tables', serialize($this->has_table_cache), 3600);
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$cache->set('database_columns', serialize($this->has_column_cache), 3600);
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$cache->set('database_columns_info', serialize($this->get_column_info_cache), 3600);
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$cache->set('database_checksum', serialize(sha1($config['database_host'] . '.' . $config['database_name'])), 3600);
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}
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}
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if($this->logged) {
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$currentScript = $_SERVER['REQUEST_URI'] ?? $_SERVER['SCRIPT_FILENAME'];
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log_append('database.log', $currentScript . PHP_EOL . $this->getLog());
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}
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}
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/**
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* Query-quoted field name.
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*
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* @param string $name Field name.
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* @return string Quoted name.
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*/
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public function fieldName($name)
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{
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return '`' . $name . '`';
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}
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/**
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* LIMIT/OFFSET clause for queries.
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*
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* @param int|bool $limit Limit of rows to be affected by query (false if no limit).
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* @param int|bool $offset Number of rows to be skipped before applying query effects (false if no offset).
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* @return string LIMIT/OFFSET SQL clause for query.
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*/
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public function limit($limit = false, $offset = false)
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{
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// by default this is empty part
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$sql = '';
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if($limit !== false)
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{
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$sql = ' LIMIT ';
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// OFFSET has no effect if there is no LIMIT
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if($offset !== false)
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{
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$sql .= $offset . ', ';
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}
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$sql .= $limit;
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}
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return $sql;
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}
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public function hasTable($name): bool
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{
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if(isset($this->has_table_cache[$name])) {
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return $this->has_table_cache[$name];
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}
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return $this->hasTableInternal($name);
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}
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private function hasTableInternal($name): bool
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{
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return ($this->has_table_cache[$name] = $this->query('SELECT `TABLE_NAME` FROM `information_schema`.`tables` WHERE `TABLE_SCHEMA` = ' . $this->quote(config('database_name')) . ' AND `TABLE_NAME` = ' . $this->quote($name) . ' LIMIT 1;')->rowCount() > 0);
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}
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public function hasColumn($table, $column): bool
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{
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if(isset($this->has_column_cache[$table . '.' . $column])) {
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return $this->has_column_cache[$table . '.' . $column];
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}
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return $this->hasColumnInternal($table, $column);
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}
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private function hasColumnInternal($table, $column): bool {
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return $this->hasTable($table) && ($this->has_column_cache[$table . '.' . $column] = count($this->query('SHOW COLUMNS FROM `' . $table . "` LIKE " . $this->quote($column))->fetchAll()) > 0);
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}
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public function hasTableAndColumns(string $table, array $columns = []): bool
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{
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if (!$this->hasTable($table)) return false;
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foreach ($columns as $column) {
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if (!$this->hasColumn($table, $column)) {
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return false;
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}
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}
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return true;
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}
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public function getColumnInfo(string $table, string $column): bool|array
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{
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if(isset($this->get_column_info_cache[$table . '.' . $column])) {
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return $this->get_column_info_cache[$table . '.' . $column];
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}
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return $this->getColumnInfoInternal($table, $column);
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}
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private function getColumnInfoInternal(string $table, string $column): bool|array
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{
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if (!$this->hasTable($table) || !$this->hasColumn($table, $column)) {
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return false;
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}
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$formatResult = function ($result) {
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return [
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'field' => $result['Field'],
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'type' => $result['Type'],
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'null' => strtolower($result['Null']),
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'default' => $result['Default'],
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'extra' => $result['Extra'],
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];
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};
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$query = $this->query('SHOW COLUMNS FROM `' . $table . "` LIKE " . $this->quote($column));
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$rowCount = $query->rowCount();
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if ($rowCount > 1) {
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$tmp = [];
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$results = $query->fetchAll(PDO::FETCH_ASSOC);
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foreach ($results as $result) {
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$tmp[] = $formatResult($result);
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}
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return ($this->get_column_info_cache[$table . '.' . $column] = $tmp);
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}
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else if ($rowCount == 1) {
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$result = $query->fetch(PDO::FETCH_ASSOC);
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return ($this->get_column_info_cache[$table . '.' . $column] = $formatResult($result));
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}
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return [];
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}
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public function revalidateCache(): void
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{
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foreach($this->has_table_cache as $key => $value) {
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$this->hasTableInternal($key);
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}
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foreach($this->has_column_cache as $key => $value) {
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$explode = explode('.', $key);
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if(!isset($this->has_table_cache[$explode[0]])) { // first check if table exist
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$this->hasTableInternal($explode[0]);
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}
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if($this->has_table_cache[$explode[0]]) {
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$this->hasColumnInternal($explode[0], $explode[1]);
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}
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}
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foreach($this->get_column_info_cache as $key => $value) {
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$explode = explode('.', $key);
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if(!isset($this->has_table_cache[$explode[0]])) { // first check if table exist
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$this->hasTableInternal($explode[0]);
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}
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if($this->has_table_cache[$explode[0]]) {
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$this->hasColumnInternal($explode[0], $explode[1]);
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}
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if($this->has_table_cache[$explode[0]]) {
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$this->getColumnInfoInternal($explode[0], $explode[1]);
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}
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}
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}
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public function setClearCacheAfter($clearCache)
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{
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$this->clearCacheAfter = $clearCache;
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}
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}
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/**#@-*/
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?>
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