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<?php
namespace Wikimedia\Rdbms;
use InvalidArgumentException;
use Wikimedia\Rdbms\Database\DbQuoter;
// Very long type annotations :(
// phpcs:disable Generic.Files.LineLength
/**
* A composite node representing a group of expressions.
*
* @since 1.42
*/
abstract class ExpressionGroup implements IExpression {
/**
* @var IExpression[]
*/
protected array $children = [];
/**
* @param IExpression ...$children
* @internal Outside of rdbms, Use IReadableDatabase::andExpr() or ::orExpr to create an expression group object
*/
public function __construct( IExpression ...$children ) {
$this->children = $children;
}
final protected function add( IExpression $expression ) {
$this->children[] = $expression;
}
abstract protected function getType(): string;
/**
* @internal to rdbms
* @param non-empty-array<string,?scalar|RawSQLValue|Blob|LikeValue|non-empty-list<scalar|Blob>>|non-empty-array<int,IExpression> $conds
* @param-taint $conds exec_sql_numkey
* @return static
*/
public static function newFromArray( array $conds ) {
if ( !$conds ) {
throw new InvalidArgumentException( "The array of conditions can't be empty." );
}
$exprs = [];
foreach ( $conds as $field => $cond ) {
if ( is_numeric( $field ) ) {
if ( !$cond instanceof IExpression ) {
throw new InvalidArgumentException( __METHOD__ . ": Only IExpression are allowed with numeric key." );
}
$exprs[] = $cond;
} else {
if ( $cond instanceof IExpression ) {
throw new InvalidArgumentException( __METHOD__ . ": unexpected key $field for IExpression value" );
}
$exprs[] = new Expression( $field, '=', $cond );
}
}
// @phan-suppress-next-line PhanTypeInstantiateAbstractStatic
return new static( ...$exprs );
}
/**
* @param DbQuoter $dbQuoter
* @return string
* @return-taint none
*/
final public function toSql( DbQuoter $dbQuoter ): string {
if ( !$this->children ) {
throw new InvalidArgumentException( "The array of values can't be empty." );
}
$sqls = array_map( static fn ( $value ) => $value->toSql( $dbQuoter ), $this->children );
return '(' . implode( ' ' . $this->getType() . ' ', $sqls ) . ')';
}
final public function toGeneralizedSql(): string {
if ( !$this->children ) {
throw new InvalidArgumentException( "The array of values can't be empty." );
}
$sqls = array_map( static fn ( $value ) => $value->toGeneralizedSql(), $this->children );
return '(' . implode( ' ' . $this->getType() . ' ', $sqls ) . ')';
}
}
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