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<?php |
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declare(strict_types=1); |
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namespace PhpMyAdmin\SqlParser\Components; |
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use PhpMyAdmin\SqlParser\Component; |
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use PhpMyAdmin\SqlParser\Context; |
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use PhpMyAdmin\SqlParser\Parser; |
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use PhpMyAdmin\SqlParser\Token; |
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use PhpMyAdmin\SqlParser\TokensList; |
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use function implode; |
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use function trim; |
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/** |
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* `REFERENCES` keyword parser. |
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*/ |
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final class Reference implements Component |
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{ |
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/** |
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* All references options. |
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* |
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* @var array<string, int|array<int, int|string>> |
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* @psalm-var array<string, (positive-int|array{positive-int, ('var'|'var='|'expr'|'expr=')})> |
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*/ |
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public static $referencesOptions = [ |
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'MATCH' => [ |
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1, |
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'var', |
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], |
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'ON DELETE' => [ |
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2, |
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'var', |
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], |
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'ON UPDATE' => [ |
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3, |
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'var', |
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], |
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]; |
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/** |
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* The referenced table. |
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* |
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* @var Expression |
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*/ |
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public $table; |
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/** |
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* The referenced columns. |
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* |
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* @var string[] |
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*/ |
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public $columns; |
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/** |
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* The options of the referencing. |
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* |
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* @var OptionsArray |
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*/ |
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public $options; |
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/** |
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* @param Expression $table the name of the table referenced |
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* @param string[] $columns the columns referenced |
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* @param OptionsArray $options the options |
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*/ |
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public function __construct($table = null, array $columns = [], $options = null) |
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{ |
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$this->table = $table; |
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$this->columns = $columns; |
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$this->options = $options; |
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} |
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/** |
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* @param Parser $parser the parser that serves as context |
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* @param TokensList $list the list of tokens that are being parsed |
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* @param array<string, mixed> $options parameters for parsing |
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* |
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* @return Reference |
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*/ |
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public static function parse(Parser $parser, TokensList $list, array $options = []) |
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{ |
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$ret = new static(); |
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/** |
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* The state of the parser. |
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* |
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* Below are the states of the parser. |
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* |
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* 0 ----------------------[ table ]---------------------> 1 |
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* |
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* 1 ---------------------[ columns ]--------------------> 2 |
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* |
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* 2 ---------------------[ options ]--------------------> (END) |
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* |
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* @var int |
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*/ |
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$state = 0; |
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for (; $list->idx < $list->count; ++$list->idx) { |
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/** |
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* Token parsed at this moment. |
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*/ |
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$token = $list->tokens[$list->idx]; |
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// End of statement. |
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if ($token->type === Token::TYPE_DELIMITER) { |
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2 |
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break; |
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} |
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// Skipping whitespaces and comments. |
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if (($token->type === Token::TYPE_WHITESPACE) || ($token->type === Token::TYPE_COMMENT)) { |
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continue; |
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} |
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if ($state === 0) { |
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$ret->table = Expression::parse( |
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$parser, |
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$list, |
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[ |
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'parseField' => 'table', |
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'breakOnAlias' => true, |
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] |
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); |
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$state = 1; |
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} elseif ($state === 1) { |
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$ret->columns = ArrayObj::parse($parser, $list)->values; |
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$state = 2; |
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} elseif ($state === 2) { |
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$ret->options = OptionsArray::parse($parser, $list, static::$referencesOptions); |
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++$list->idx; |
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break; |
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} |
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} |
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--$list->idx; |
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return $ret; |
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} |
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/** |
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* @param Reference $component the component to be built |
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* @param array<string, mixed> $options parameters for building |
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*/ |
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public static function build($component, array $options = []): string |
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{ |
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return trim( |
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$component->table |
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. ' (' . implode(', ', Context::escape($component->columns)) . ') ' |
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. $component->options |
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); |
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} |
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public function __toString(): string |
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{ |
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return static::build($this); |
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} |
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} |
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phpmyadmin /
sql-parser
