Pattern.php

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<?php
 
namespace MediaWiki\User\TempUser;
 
use Stringable;
use UnexpectedValueException;
use Wikimedia\Rdbms\LikeValue;
use Wikimedia\Rdbms\Platform\ISQLPlatform;
 
class Pattern implements Stringable {
    private $prefix;
    private $suffix;
 
    public function __construct(
        private readonly string $debugName,
        private readonly string $pattern,
    ) {
    }
 
    public function isMatch( string $name ) {
        $this->init();
        $match = true;
        if ( $this->prefix !== '' ) {
            $match = str_starts_with( $name, $this->prefix );
        }
        if ( $match && $this->suffix !== '' ) {
            $match = str_ends_with( $name, $this->suffix )
                && strlen( $name ) >= strlen( $this->prefix ) + strlen( $this->suffix );
        }
        return $match;
    }
 
    public function generate( $mappedSerial, ?string $year = null ) {
        $this->init();
        return $this->prefix .
            ( $year ? $year . '-' : '' ) .
            $mappedSerial .
            $this->suffix;
    }
 
    public function buildLike( ISQLPlatform $db ) {
        wfDeprecated( __METHOD__, '1.42' );
        $this->init();
        return $db->buildLike(
            $this->prefix,
            $db->anyString(),
            $this->suffix
        );
    }
 
    public function toLikeValue( ISQLPlatform $db ): LikeValue {
        $this->init();
        return new LikeValue(
            $this->prefix,
            $db->anyString(),
            $this->suffix
        );
    }
 
    public function extract( string $name ) {
        if ( $this->isMatch( $name ) ) {
            return substr( $name,
                strlen( $this->prefix ),
                strlen( $name ) - strlen( $this->prefix ) - strlen( $this->suffix ) );
        }
        return null;
    }
 
    private function init() {
        if ( $this->prefix === null ) {
            $varPos = strpos( $this->pattern, '$1' );
            if ( $varPos === false ) {
                throw new UnexpectedValueException( __CLASS__ .
                    "pattern {$this->debugName} must be of the form \"prefix \$1 suffix\"" );
            }
            $this->prefix = substr( $this->pattern, 0, $varPos );
            $this->suffix = substr( $this->pattern, $varPos + strlen( '$1' ) );
        }
    }
 
    public function __toString() {
        return $this->pattern;
    }
}