ResourceLoaderOOUIFileModule.php

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<?php
class ResourceLoaderOOUIFileModule extends ResourceLoaderFileModule {
    use ResourceLoaderOOUIModule;
 
    public function __construct( $options = [] ) {
        if ( isset( $options['themeScripts'] ) ) {
            $skinScripts = $this->getSkinSpecific( $options['themeScripts'], 'scripts' );
            if ( !isset( $options['skinScripts'] ) ) {
                $options['skinScripts'] = [];
            }
            $this->extendSkinSpecific( $options['skinScripts'], $skinScripts );
        }
        if ( isset( $options['themeStyles'] ) ) {
            $skinStyles = $this->getSkinSpecific( $options['themeStyles'], 'styles' );
            if ( !isset( $options['skinStyles'] ) ) {
                $options['skinStyles'] = [];
            }
            $this->extendSkinSpecific( $options['skinStyles'], $skinStyles );
        }
 
        parent::__construct( $options );
    }
 
    private function getSkinSpecific( $module, $which ) {
        $themes = self::getSkinThemeMap();
 
        return array_combine(
            array_keys( $themes ),
            array_map( function ( $theme ) use ( $module, $which ) {
                if ( $which === 'scripts' ) {
                    return $this->getThemeScriptsPath( $theme, $module );
                } else {
                    return $this->getThemeStylesPath( $theme, $module );
                }
            }, array_values( $themes ) )
        );
    }
 
    private function extendSkinSpecific( &$skinSpecific, $extraSkinSpecific ) {
        // For each skin where skinStyles/skinScripts are defined, add our ones at the beginning
        foreach ( $skinSpecific as $skin => $files ) {
            if ( !is_array( $files ) ) {
                $files = [ $files ];
            }
            if ( isset( $extraSkinSpecific[$skin] ) ) {
                $skinSpecific[$skin] = array_merge( [ $extraSkinSpecific[$skin] ], $files );
            } elseif ( isset( $extraSkinSpecific['default'] ) ) {
                $skinSpecific[$skin] = array_merge( [ $extraSkinSpecific['default'] ], $files );
            }
        }
        // Add our remaining skinStyles/skinScripts for skins that did not have them defined
        foreach ( $extraSkinSpecific as $skin => $file ) {
            if ( !isset( $skinSpecific[$skin] ) ) {
                $skinSpecific[$skin] = $file;
            }
        }
    }
}