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<?php
namespace CirrusSearch\Query;
use CirrusSearch\CrossSearchStrategy;
use CirrusSearch\Parser\AST\KeywordFeatureNode;
use CirrusSearch\Query\Builder\QueryBuildingContext;
use CirrusSearch\Search\Filters;
use CirrusSearch\Search\SearchContext;
use CirrusSearch\WarningCollector;
use Config;
use Elastica\Query;
use Elastica\Query\AbstractQuery;
/**
 * File type features:
 *  filetype:bitmap
 * Types can be OR'd together:
 *  filetype:bitmap|png
 * Selects only files of these specified features.
 */
class FileTypeFeature extends SimpleKeywordFeature implements FilterQueryFeature {
    public const MAX_CONDITIONS = 20;
    /** @var string[] Map of aliases from user provided term to term to search for */
    private $aliases;
    public function __construct( Config $config ) {
        $this->aliases = $config->get( 'CirrusSearchFiletypeAliases' );
    }
    /**
     * @return string[]
     */
    protected function getKeywords() {
        return [ 'filetype' ];
    }
    /**
     * @param KeywordFeatureNode $node
     * @return CrossSearchStrategy
     */
    public function getCrossSearchStrategy( KeywordFeatureNode $node ) {
        return CrossSearchStrategy::allWikisStrategy();
    }
    /**
     * @param SearchContext $context
     * @param string $key The keyword
     * @param string $value The value attached to the keyword with quotes stripped
     * @param string $quotedValue The original value in the search string, including quotes
     *     if used
     * @param bool $negated Is the search negated? Not used to generate the returned
     *     AbstractQuery, that will be negated as necessary. Used for any other building/context
     *     necessary.
     * @return array Two element array, first an AbstractQuery or null to apply to the
     *  query. Second a boolean indicating if the quotedValue should be kept in the search
     *  string.
     */
    protected function doApply( SearchContext $context, $key, $value, $quotedValue, $negated ) {
        $parsed = $this->parseValue( $key, $value, $quotedValue, '', '', $context );
        '@phan-var array $parsed';
        $query = $this->matchFileType( array_merge( $parsed['aliased'], $parsed['user_types'] ) );
        return [ $query, false ];
    }
    /**
     * @param string $key
     * @param string $value
     * @param string $quotedValue
     * @param string $valueDelimiter
     * @param string $suffix
     * @param WarningCollector $warningCollector
     * @return array|false|null
     */
    public function parseValue( $key, $value, $quotedValue, $valueDelimiter, $suffix, WarningCollector $warningCollector ) {
        // TODO: The explode/count/warn is repeated elsewhere and should be generalized?
        $types = explode( '|', $value );
        if ( count( $types ) > self::MAX_CONDITIONS ) {
            $warningCollector->addWarning(
                'cirrussearch-feature-too-many-conditions',
                $key,
                self::MAX_CONDITIONS
            );
            $types = array_slice(
                $types,
                0,
                self::MAX_CONDITIONS
            );
        }
        $aliased = [];
        foreach ( $types as $type ) {
            $lcType = mb_strtolower( $type );
            if ( isset( $this->aliases[$lcType] ) ) {
                $aliased[] = $this->aliases[$lcType];
            }
        }
        return [
            'user_types' => $types,
            'aliased' => $aliased,
        ];
    }
    /**
     * @param string[] $types
     * @return Query\BoolQuery|Query\MatchQuery|null
     */
    protected function matchFileType( $types ) {
        $queries = [];
        foreach ( $types as $type ) {
            $queries[] = new Query\MatchQuery( 'file_media_type', [ 'query' => $type ] );
        }
        return Filters::booleanOr( $queries, false );
    }
    /**
     * @param KeywordFeatureNode $node
     * @param QueryBuildingContext $context
     * @return AbstractQuery|null
     */
    public function getFilterQuery( KeywordFeatureNode $node, QueryBuildingContext $context ) {
        $parsed = $node->getParsedValue();
        '@phan-var array $parsed';
        return $this->matchFileType( array_merge( $parsed['aliased'], $parsed['user_types'] ) );
    }
}