UploadDef.php

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<?php
 
namespace Wikimedia\ParamValidator\TypeDef;
 
use InvalidArgumentException;
use Psr\Http\Message\UploadedFileInterface;
use UnexpectedValueException;
use Wikimedia\Message\MessageValue;
use Wikimedia\ParamValidator\ParamValidator;
use Wikimedia\ParamValidator\TypeDef;
use Wikimedia\ParamValidator\Util\UploadedFile;
 
class UploadDef extends TypeDef {
 
    public function getValue( $name, array $settings, array $options ) {
        $ret = $this->callbacks->getUploadedFile( $name, $options );
 
        if ( $ret && $ret->getError() === UPLOAD_ERR_NO_FILE &&
            !$this->callbacks->hasParam( $name, $options )
        ) {
            // This seems to be that the client explicitly specified "no file" for the field
            // instead of just omitting the field completely. DWTM.
            $ret = null;
        } elseif ( !$ret && $this->callbacks->hasParam( $name, $options ) ) {
            // The client didn't format their upload properly so it came in as an ordinary
            // field. Convert it to an error.
            $ret = new UploadedFile( [
                'name' => '',
                'type' => '',
                'tmp_name' => '',
                'error' => -42, // PHP's UPLOAD_ERR_* are all positive numbers.
                'size' => 0,
            ] );
        }
 
        return $ret;
    }
 
    protected function getIniSize() {
        return ini_get( 'upload_max_filesize' );
    }
 
    public function validate( $name, $value, array $settings, array $options ) {
        static $codemap = [
            -42 => 'notupload', // Local from getValue()
            UPLOAD_ERR_FORM_SIZE => 'formsize',
            UPLOAD_ERR_PARTIAL => 'partial',
            UPLOAD_ERR_NO_FILE => 'nofile',
            UPLOAD_ERR_NO_TMP_DIR => 'notmpdir',
            UPLOAD_ERR_CANT_WRITE => 'cantwrite',
            UPLOAD_ERR_EXTENSION => 'phpext',
        ];
 
        if ( !$value instanceof UploadedFileInterface ) {
            // Err?
            $type = is_object( $value ) ? get_class( $value ) : gettype( $value );
            throw new InvalidArgumentException( "\$value must be UploadedFileInterface, got $type" );
        }
 
        $err = $value->getError();
        if ( $err === UPLOAD_ERR_OK ) {
            return $value;
        } elseif ( $err === UPLOAD_ERR_INI_SIZE ) {
            static $prefixes = [
                'g' => 1024 ** 3,
                'm' => 1024 ** 2,
                'k' => 1024 ** 1,
            ];
            $size = $this->getIniSize();
            $last = strtolower( substr( $size, -1 ) );
            $size = intval( $size, 10 ) * ( $prefixes[$last] ?? 1 );
            $this->failure(
                $this->failureMessage( 'badupload', [
                    'code' => 'inisize',
                    'size' => $size,
                ], 'inisize' )->sizeParams( $size ),
                $name, '', $settings, $options
            );
        } elseif ( isset( $codemap[$err] ) ) {
            $this->failure(
                $this->failureMessage( 'badupload', [ 'code' => $codemap[$err] ], $codemap[$err] ),
                $name, '', $settings, $options
            );
        } else {
            $constant = '';
            foreach ( get_defined_constants() as $c => $v ) {
                if ( $v === $err && substr( $c, 0, 11 ) === 'UPLOAD_ERR_' ) {
                    $constant = " ($c?)";
                }
            }
            throw new UnexpectedValueException( "Unrecognized PHP upload error value $err$constant" );
        }
    }
 
    public function checkSettings( string $name, $settings, array $options, array $ret ): array {
        $ret = parent::checkSettings( $name, $settings, $options, $ret );
 
        if ( isset( $settings[ParamValidator::PARAM_DEFAULT] ) ) {
            $ret['issues'][ParamValidator::PARAM_DEFAULT] =
                'Cannot specify a default for upload-type parameters';
        }
 
        if ( !empty( $settings[ParamValidator::PARAM_ISMULTI] ) &&
            !isset( $ret['issues'][ParamValidator::PARAM_ISMULTI] )
        ) {
            $ret['issues'][ParamValidator::PARAM_ISMULTI] =
                'PARAM_ISMULTI cannot be used for upload-type parameters';
        }
 
        return $ret;
    }
 
    public function stringifyValue( $name, $value, array $settings, array $options ) {
        // Not going to happen.
        return null;
    }
 
    public function getHelpInfo( $name, array $settings, array $options ) {
        $info = parent::getHelpInfo( $name, $settings, $options );
 
        $info[ParamValidator::PARAM_TYPE] = MessageValue::new( 'paramvalidator-help-type-upload' );
 
        return $info;
    }
 
}