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<?php |
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/** |
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* @package CleverStyle Framework |
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* @author Nazar Mokrynskyi <[email protected]> |
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* @copyright Copyright (c) 2016-2017, Nazar Mokrynskyi |
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* @license MIT License, see license.txt |
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*/ |
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namespace cs\DB; |
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use |
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SQLite3Result; |
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class SQLite extends _Abstract { |
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/** |
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* @var \SQLite3 Instance of DB connection |
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*/ |
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protected $instance; |
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/** |
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* @param string $database Ignored for SQLite |
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* @param string $user Ignored for SQLite |
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* @param string $password Ignored for SQLite |
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* @param string $host Path to database file, relatively to website root or absolute |
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* @param string $prefix |
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*/ |
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public function __construct ($database, $user = '', $password = '', $host = '', $prefix = '') { |
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if (!$host) { |
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return; |
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} |
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$start = microtime(true); |
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try { |
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$this->instance = new \SQLite3($host); |
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$this->database = $database; |
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$this->connected = true; |
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$this->connecting_time = microtime(true) - $start; |
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$this->db_type = 'sqlite'; |
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$this->prefix = $prefix; |
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} catch (\Exception $e) { |
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} |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function q ($query, ...$params) { |
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return parent::q( |
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$this->convert_sql($query), |
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...$params |
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); |
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} |
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/** |
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* Convert small subset of MySQL queries into SQLite-compatible syntax |
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* |
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* @param string $query |
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* |
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* @return string |
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*/ |
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protected function convert_sql ($query) { |
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return str_replace('INSERT IGNORE', 'INSERT OR IGNORE', $query); |
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} |
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/** |
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* @inheritdoc |
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* |
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* @return false|SQLite3Result |
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*/ |
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protected function q_internal ($query, $parameters = []) { |
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if (!$query) { |
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return false; |
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} |
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if ($parameters) { |
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$stmt = $this->instance->prepare($query); |
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if (!$stmt) { |
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return false; |
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} |
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// Allows to provide more parameters for prepared statements than needed |
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$local_parameters = array_slice($parameters, 0, substr_count($query, '?')); |
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foreach ($local_parameters as $index => $parameter) { |
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$stmt->bindValue($index + 1, $parameter); |
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} |
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return $stmt->execute(); |
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} |
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return $this->instance->query($query); |
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} |
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/** |
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* @inheritdoc |
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* |
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* @param false|SQLite3Result $query_result |
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*/ |
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public function f ($query_result, $single_column = false, $array = false, $indexed = false) { |
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if (!($query_result instanceof SQLite3Result)) { |
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return false; |
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} |
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$result_type = $single_column || $indexed ? SQLITE3_NUM : SQLITE3_ASSOC; |
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if ($array) { |
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$result = []; |
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while ($current = $query_result->fetchArray($result_type)) { |
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$result[] = $single_column ? $current[0] : $current; |
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} |
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$this->free($query_result); |
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return $result; |
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} |
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$result = $query_result->fetchArray($result_type); |
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return $single_column && $result ? $result[0] : $result; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function id () { |
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return $this->instance->lastInsertRowID(); |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function affected () { |
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return $this->instance->changes(); |
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} |
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/** |
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* @inheritdoc |
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* |
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* @param false|SQLite3Result $query_result |
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*/ |
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public function free ($query_result) { |
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if ($query_result instanceof SQLite3Result) { |
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return $query_result->finalize(); |
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} |
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return true; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function columns ($table, $like = false) { |
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if (!$table) { |
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return false; |
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} |
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$columns = $this->qfa("PRAGMA table_info(`$table`)") ?: []; |
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foreach ($columns as &$column) { |
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$column = $column['name']; |
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} |
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/** |
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* Only support the most common cases |
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*/ |
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if ($like) { |
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if (substr($like, -1) == '%') { |
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$like = substr($like, 0, -1); |
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return array_values( |
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array_filter( |
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$columns, |
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function ($column) use ($like) { |
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return strpos($column, $like) === 0; |
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} |
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) |
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); |
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} elseif (strpos($like, '%') === false) { |
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return in_array($like, $columns) ? [$like] : []; |
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} else { |
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trigger_error("Can't get columns like $like, SQLite driver doesn't support such conditions", E_USER_WARNING); |
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return []; |
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} |
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} |
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return $columns; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function tables ($like = false) { |
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if ($like) { |
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$like = $this->s($like); |
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return $this->qfas( |
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"SELECT `name` |
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FROM `sqlite_master` |
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WHERE |
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`type` = 'table' AND |
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`name` != 'sqlite_sequence' AND |
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`name` LIKE $like |
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ORDER BY `name` ASC" |
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) ?: []; |
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} else { |
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return $this->qfas( |
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"SELECT `name` |
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FROM `sqlite_master` |
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WHERE |
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`type` = 'table' AND |
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`name` != 'sqlite_sequence' |
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ORDER BY `name` ASC" |
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) ?: []; |
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} |
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} |
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/** |
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* @inheritdoc |
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*/ |
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protected function s_internal ($string, $single_quotes_around) { |
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$return = \SQLite3::escapeString($string); |
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return $single_quotes_around ? "'$return'" : $return; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function server () { |
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return \SQLite3::version()['versionString']; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function __destruct () { |
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if ($this->connected && is_object($this->instance)) { |
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$this->instance->close(); |
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$this->connected = false; |
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} |
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} |
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} |
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nazar-pc /
CleverStyle-Framework
