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<?php |
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namespace Vectorface\MySQLite; |
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use InvalidArgumentException; |
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use PDO; |
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use ReflectionClass; |
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use ReflectionMethod; |
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use Vectorface\MySQLite\MySQL\Aggregate; |
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use Vectorface\MySQLite\MySQL\Comparison; |
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use Vectorface\MySQLite\MySQL\DateTime; |
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use Vectorface\MySQLite\MySQL\Flow; |
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use Vectorface\MySQLite\MySQL\Numeric; |
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use Vectorface\MySQLite\MySQL\StringFunctions; |
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/** |
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* Provides some compatibility functions, allowing SQLite to mimic some MySQL functions. |
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* |
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* All public methods starting with a mysql_ will be registered by the addFunctions method. |
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*/ |
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class MySQLite |
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{ |
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/** |
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* Individual traits group functions into MySQL's documented function categories. |
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*/ |
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use Aggregate; |
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use Comparison; |
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use DateTime; |
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use Flow; |
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use Numeric; |
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use StringFunctions; |
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/** |
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* Get a list of MySQL compatibility functions currently provided by this class. |
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* |
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* @return string[] An array of function names, normalized to lower case. |
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*/ |
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public static function getFunctionList() |
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{ |
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return array_map( |
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function ($f) { |
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return substr($f, 6); |
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}, |
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array_keys(static::getPublicMethodData()) |
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); |
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} |
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/** |
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* Add MySQLite compatibility functions to a PDO object. |
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* |
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* @param PDO &$pdo A PDO instance to which the MySQLite compatibility functions should be added. |
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* @param string[] $fnList A list of functions to create on the SQLite database. (Omit to create all.) |
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* @return PDO Returns a reference to the PDO instance passed in to the function. |
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*/ |
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public static function &createFunctions(PDO &$pdo, ?array $fnList = null) |
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{ |
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if ($pdo->getAttribute(PDO::ATTR_DRIVER_NAME) !== 'sqlite') { |
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throw new InvalidArgumentException('Expecting a PDO instance using the SQLite driver'); |
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} |
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foreach (static::getPublicMethodData() as $method => $paramCount) { |
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static::registerMethod($pdo, $method, $paramCount, $fnList); |
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} |
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return $pdo; |
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} |
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/** |
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* Get information about functions that are meant to be exposed by this class. |
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* |
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* @return int[] An associative array composed of function names mapping to accepted parameter counts. |
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*/ |
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protected static function getPublicMethodData() |
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{ |
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$data = []; |
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$ref = new ReflectionClass(__CLASS__); |
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$methods = $ref->getMethods(ReflectionMethod::IS_PUBLIC | ReflectionMethod::IS_STATIC); |
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foreach ($methods as $method) { |
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if (strpos($method->name, 'mysql_') !== 0) { |
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continue; |
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} |
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$data[$method->name] = $method->getNumberOfRequiredParameters(); |
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} |
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return $data; |
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} |
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/** |
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* Register a method as an SQLite funtion |
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* |
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* @param PDO &$pdo A PDO instance to which the MySQLite compatibility functions should be added. |
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* @param string $method The internal method name. |
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* @param int $paramCount The suggested parameter count. |
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* @param string[] $fnList A list of functions to create on the SQLite database, or empty for all. |
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* @return bool Returns true if the method was registed. False otherwise. |
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*/ |
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protected static function registerMethod(PDO &$pdo, $method, $paramCount, ?array $fnList = null) |
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{ |
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$function = substr($method, 6); /* Strip 'mysql_' prefix to get the function name. */ |
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/* Skip functions not in the list. */ |
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if (!empty($fnList) && !in_array($function, $fnList)) { |
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return false; |
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} |
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if ($paramCount) { |
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return $pdo->sqliteCreateFunction($function, [__CLASS__, $method], $paramCount); |
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} |
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return $pdo->sqliteCreateFunction($function, [__CLASS__, $method]); |
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} |
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} |
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Vectorface /
MySQLite
