BooleanDef.php

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<?php
 
namespace Wikimedia\ParamValidator\TypeDef;
 
use Wikimedia\Message\MessageValue;
use Wikimedia\Message\ParamType;
use Wikimedia\Message\ScalarParam;
use Wikimedia\ParamValidator\ParamValidator;
use Wikimedia\ParamValidator\TypeDef;
 
class BooleanDef extends TypeDef {
 
    public static $TRUEVALS = [ 'true', 't', 'yes', 'y', 'on', '1' ];
    public static $FALSEVALS = [ 'false', 'f', 'no', 'n', 'off', '0' ];
 
    public function validate( $name, $value, array $settings, array $options ) {
        $value = strtolower( $value );
        if ( in_array( $value, self::$TRUEVALS, true ) ) {
            return true;
        }
        if ( $value === '' || in_array( $value, self::$FALSEVALS, true ) ) {
            return false;
        }
 
        $this->failure(
            $this->failureMessage( 'badbool' )
                ->textListParams( array_map( [ $this, 'quoteVal' ], self::$TRUEVALS ) )
                ->numParams( count( self::$TRUEVALS ) )
                ->textListParams( array_merge(
                    array_map( [ $this, 'quoteVal' ], self::$FALSEVALS ),
                    [ MessageValue::new( 'paramvalidator-emptystring' ) ]
                ) )
                ->numParams( count( self::$FALSEVALS ) + 1 ),
            $name, $value, $settings, $options
        );
    }
 
    private function quoteVal( $v ) {
        return new ScalarParam( ParamType::TEXT, "\"$v\"" );
    }
 
    public function stringifyValue( $name, $value, array $settings, array $options ) {
        return $value ? self::$TRUEVALS[0] : self::$FALSEVALS[0];
    }
 
    public function getHelpInfo( $name, array $settings, array $options ) {
        $info = parent::getHelpInfo( $name, $settings, $options );
 
        $info[ParamValidator::PARAM_TYPE] = MessageValue::new( 'paramvalidator-help-type-boolean' )
            ->params( empty( $settings[ParamValidator::PARAM_ISMULTI] ) ? 1 : 2 );
 
        return $info;
    }
 
}