CssCompiler.php

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<?php

namespace Elgg\Assets;

use Elgg\Config;
use Elgg\Includer;
use Elgg\PluginHooksService;
use Elgg\Project\Paths;

class CssCompiler {

    protected $config;

    protected $hooks;

    public function __construct(Config $config, PluginHooksService $hooks) {
        $this->config = $config;
        $this->hooks = $hooks;
    }

    public function compile($css, array $options = []) {
        $defaults = [
            'minify' => false, // minify handled by _elgg_views_minify
            'formatter' => 'single-line', // shows lowest byte size
            'versioning' => false, // versioning done by Elgg
            'rewrite_import_urls' => false,
        ];

        $config = (array) $this->config->css_compiler_options;

        $options = array_merge($defaults, $config, $options);

        $default_vars = $this->getDefaultVars();
        $custom_vars = (array) elgg_extract('vars', $options, []);
        $vars = array_merge($default_vars, $custom_vars);

        $options['vars'] = $this->hooks->trigger('vars:compiler', 'css', $options, $vars);

        return csscrush_string($css, $options);
    }

    protected function getDefaultVars() {
        $file = Paths::elgg() . 'engine/theme.php';
        return Includer::includeFile($file);
    }
}