DoctrineSchemaChangeBuilder.php

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<?php
 
namespace Wikimedia\Rdbms;
 
use Doctrine\DBAL\Platforms\AbstractPlatform;
use Doctrine\DBAL\Schema\Comparator;
use Doctrine\DBAL\Schema\Schema;
 
class DoctrineSchemaChangeBuilder implements SchemaChangeBuilder {
    use DoctrineAbstractSchemaTrait;
 
    private $platform;
 
    public function __construct( AbstractPlatform $platform ) {
        $this->platform = $platform;
    }
 
    private function getTableSchema( array $tableSpec ): Schema {
        return $this->addTableToSchema( new Schema(), $tableSpec );
    }
 
    public function getSchemaChangeSql( array $schemaChangeSpec ): array {
        $comparator = new Comparator();
        $schemaDiff = $comparator->compare(
            $this->getTableSchema( $schemaChangeSpec['before'] ),
            $this->getTableSchema( $schemaChangeSpec['after'] )
        );
        return $schemaDiff->toSql( $this->platform );
    }
}