MediaFileTrait.php

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<?php
use MediaWiki\MainConfigNames;
use MediaWiki\MediaWikiServices;
use MediaWiki\Permissions\Authority;
use MediaWiki\User\UserIdentity;
 
trait MediaFileTrait {
    private function getFileInfo( $file, Authority $performer, $transforms ) {
        // If there is a problem with the file, there is very little info we can reliably
        // return (T228286, T239213), but we do what we can (T201205).
        $responseFile = [
            'title' => $file->getTitle()->getText(),
            'file_description_url' => wfExpandUrl( $file->getDescriptionUrl(), PROTO_RELATIVE ),
            'latest' => null,
            'preferred' => null,
            'original' => null,
        ];
 
        foreach ( array_keys( $transforms ) as $transformType ) {
            $responseFile[$transformType] = null;
        }
 
        if ( $file->exists() ) {
            $uploader = $file->getUploader( File::FOR_THIS_USER, $performer );
            if ( $uploader ) {
                $fileUser = [
                    'id' => $uploader->getId(),
                    'name' => $uploader->getName(),
                ];
            } else {
                $fileUser = [
                    'id' => null,
                    'name' => null,
                ];
            }
            $responseFile['latest'] = [
                'timestamp' => wfTimestamp( TS_ISO_8601, $file->getTimestamp() ),
                'user' => $fileUser,
            ];
 
            // If the file doesn't and shouldn't have a duration, return null instead of 0.
            // Testing for 0 first, then checking mediatype, makes gifs behave as desired for
            // both still and animated cases.
            $duration = $file->getLength();
            $mediaTypesWithDurations = [ MEDIATYPE_AUDIO, MEDIATYPE_VIDEO, MEDIATYPE_MULTIMEDIA ];
            if ( $duration == 0 && !in_array( $file->getMediaType(), $mediaTypesWithDurations ) ) {
                $duration = null;
            }
 
            if ( $file->allowInlineDisplay() ) {
                foreach ( $transforms as $transformType => $transform ) {
                    $responseFile[$transformType] = $this->getTransformInfo(
                        $file,
                        // @phan-suppress-next-line PhanTypeMismatchArgumentNullable False positive
                        $duration,
                        $transform['maxWidth'],
                        $transform['maxHeight']
                    );
                }
            }
 
            $responseFile['original'] = [
                'mediatype' => $file->getMediaType(),
                'size' => $file->getSize(),
                'width' => $file->getWidth() ?: null,
                'height' => $file->getHeight() ?: null,
                'duration' => $duration,
                'url' => wfExpandUrl( $file->getUrl(), PROTO_RELATIVE ),
            ];
        }
 
        return $responseFile;
    }
 
    private function getTransformInfo( $file, $duration, $maxWidth, $maxHeight ) {
        $transformInfo = null;
 
        try {
            list( $width, $height ) = $file->getDisplayWidthHeight( $maxWidth, $maxHeight );
            $transform = $file->transform( [ 'width' => $width, 'height' => $height ] );
            if ( $transform && !$transform->isError() ) {
                // $file->getSize() returns original size. Only include if dimensions match.
                $size = null;
                if ( $file->getWidth() == $transform->getWidth() &&
                    $file->getHeight() == $transform->getHeight()
                ) {
                    $size = $file->getSize();
                }
 
                $transformInfo = [
                    'mediatype' => $transform->getFile()->getMediaType(),
                    'size' => $size,
                    'width' => $transform->getWidth() ?: null,
                    'height' => $transform->getHeight() ?: null,
                    'duration' => $duration,
                    'url' => wfExpandUrl( $transform->getUrl(), PROTO_RELATIVE ),
                ];
            }
        } catch ( MWException $e ) {
            // Caller decides what to do on failure
        }
 
        return $transformInfo;
    }
 
    public static function getImageLimitsFromOption( UserIdentity $user, string $optionName ) {
        $imageLimits = MediaWikiServices::getInstance()->getMainConfig()
            ->get( MainConfigNames::ImageLimits );
        $optionsLookup = MediaWikiServices::getInstance()->getUserOptionsLookup();
        $option = $optionsLookup->getIntOption( $user, $optionName );
        if ( !isset( $imageLimits[$option] ) ) {
            $option = $optionsLookup->getDefaultOption( $optionName );
        }
 
        // The user offset might still be incorrect, specially if
        // $wgImageLimits got changed (see T10858).
        if ( !isset( $imageLimits[$option] ) ) {
            // Default to the first offset in $wgImageLimits
            $option = 0;
        }
 
        // if nothing is set, fallback to a hardcoded default
        return $imageLimits[$option] ?? [ 800, 600 ];
    }
}