CssCompiler.php

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<?php
 
namespace Elgg\Assets;
 
use Elgg\EventsService;
use Elgg\Includer;
use Elgg\Project\Paths;
 
class CssCompiler {
    
    protected ?array $css_variables = null;
 
    public function __construct(protected EventsService $events) {
    }
    
    public function getCssVars(bool $load_config_vars = true): array {
        if (!isset($this->css_variables)) {
            $this->css_variables = Includer::includeFile(Paths::elgg() . 'engine/theme.php');
            $this->loadPluginVars();
        }
 
        $results = $this->css_variables;
        
        if (!$load_config_vars) {
            return $results;
        }
        
        $custom_vars = (array) elgg_get_config('custom_theme_vars', []);
        if (empty($custom_vars)) {
            return $results;
        }
        
        $first_element = $custom_vars[array_key_first($custom_vars)];
        if (!is_array($first_element)) {
            // assume site config only has default color scheme variables (pre 7.0)
            $custom_vars = ['default' => $custom_vars];
        }
 
        foreach ($custom_vars as $color_scheme => $variables) {
            $results[$color_scheme] = array_merge(elgg_extract($color_scheme, $results), $variables);
        }
        
        return $results;
    }
 
    protected function loadPluginVars(): void {
        $plugins = elgg_get_plugins('active');
        foreach ($plugins as $plugin) {
            $plugin_vars = $plugin->getStaticConfig('theme', []);
            if (empty($plugin_vars)) {
                continue;
            }
            
            $first_item = $plugin_vars[array_key_first($plugin_vars)];
            if (!is_array($first_item)) {
                // assume plugin config only has default color scheme variables
                $plugin_vars = ['default' => $plugin_vars];
            }
            
            foreach ($plugin_vars as $color_scheme => $variables) {
                $merged_variables = array_merge(elgg_extract($color_scheme, $this->css_variables), $variables);
                $this->css_variables[$color_scheme] = $merged_variables;
            }
        }
    }
}