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<?php
/**
* Parses a data type.
*/
declare(strict_types=1);
namespace PhpMyAdmin\SqlParser\Components;
use PhpMyAdmin\SqlParser\Component;
use PhpMyAdmin\SqlParser\Parser;
use PhpMyAdmin\SqlParser\Token;
use PhpMyAdmin\SqlParser\TokensList;
/**
* Parses a data type.
*/
class DataType extends Component
{
/**
* All data type options.
*
* @var array
*/
public static $DATA_TYPE_OPTIONS = [
'BINARY' => 1,
'CHARACTER SET' => [
2,
'var',
],
'CHARSET' => [
2,
'var',
],
'COLLATE' => [
3,
'var',
],
'UNSIGNED' => 4,
'ZEROFILL' => 5,
];
/**
* The name of the data type.
*
* @var string
*/
public $name;
/**
* The parameters of this data type.
*
* Some data types have no parameters.
* Numeric types might have parameters for the maximum number of digits,
* precision, etc.
* String types might have parameters for the maximum length stored.
* `ENUM` and `SET` have parameters for possible values.
*
* For more information, check the MySQL manual.
*
* @var array
*/
public $parameters = [];
/**
* The options of this data type.
*
* @var OptionsArray
*/
public $options;
/**
* @param string $name the name of this data type
* @param array $parameters the parameters (size or possible values)
* @param OptionsArray $options the options of this data type
*/
public function __construct(
$name = null,
array $parameters = [],
$options = null
) {
$this->name = $name;
$this->parameters = $parameters;
$this->options = $options;
}
/**
* @param Parser $parser the parser that serves as context
* @param TokensList $list the list of tokens that are being parsed
* @param array $options parameters for parsing
*
* @return DataType|null
*/
public static function parse(Parser $parser, TokensList $list, array $options = [])
{
$ret = new static();
/**
* The state of the parser.
*
* Below are the states of the parser.
*
* 0 -------------------[ data type ]--------------------> 1
*
* 1 ----------------[ size and options ]----------------> 2
*
* @var int
*/
$state = 0;
for (; $list->idx < $list->count; ++$list->idx) {
/**
* Token parsed at this moment.
*
* @var Token
*/
$token = $list->tokens[$list->idx];
// Skipping whitespaces and comments.
if (($token->type === Token::TYPE_WHITESPACE) || ($token->type === Token::TYPE_COMMENT)) {
continue;
}
if ($state === 0) {
$ret->name = strtoupper((string) $token->value);
if (($token->type !== Token::TYPE_KEYWORD) || (! ($token->flags & Token::FLAG_KEYWORD_DATA_TYPE))) {
$parser->error('Unrecognized data type.', $token);
}
$state = 1;
} elseif ($state === 1) {
if (($token->type === Token::TYPE_OPERATOR) && ($token->value === '(')) {
$parameters = ArrayObj::parse($parser, $list);
++$list->idx;
$ret->parameters = ($ret->name === 'ENUM') || ($ret->name === 'SET') ?
$parameters->raw : $parameters->values;
}
$ret->options = OptionsArray::parse($parser, $list, static::$DATA_TYPE_OPTIONS);
++$list->idx;
break;
}
}
if (empty($ret->name)) {
return null;
}
--$list->idx;
return $ret;
}
/**
* @param DataType $component the component to be built
* @param array $options parameters for building
*
* @return string
*/
public static function build($component, array $options = [])
{
$name = empty($options['lowercase']) ?
$component->name : strtolower($component->name);
$parameters = '';
if (! empty($component->parameters)) {
$parameters = '(' . implode(',', $component->parameters) . ')';
}
return trim($name . $parameters . ' ' . $component->options);
}
}
|
