ThemesManager.php

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<?php
 
namespace Ubiquity\themes;
 
use Ubiquity\controllers\Startup;
use Ubiquity\domains\DDDManager;
use Ubiquity\events\EventsManager;
use Ubiquity\events\ViewEvents;
use Ubiquity\exceptions\ThemesException;
use Ubiquity\views\engine\twig\Twig;
 
class ThemesManager {
    const THEMES_FOLDER = 'themes';
    private static $activeTheme;
    private static $refThemes = ['bootstrap', 'foundation', 'semantic'];
 
    public static function getActiveTheme() {
        return self::$activeTheme;
    }
 
    public static function setActiveTheme(string $activeTheme): void {
        self::$activeTheme = $activeTheme ?? '';
        $engineInstance = Startup::$templateEngine;
        if ($engineInstance instanceof Twig) {
            $engineInstance->setTheme($activeTheme, self::THEMES_FOLDER);
        } else {
            throw new ThemesException ('Template engine must be an instance of Twig for themes activation!');
        }
    }
 
    public static function saveActiveTheme(string $theme): array {
        $config = Startup::getConfig();
        $config ['templateEngineOptions'] ['activeTheme'] = $theme;
        Startup::saveConfig($config);
        return $config;
    }
 
    public static function setActiveThemeFromTwig(string $activeTheme) {
        self::$activeTheme = $activeTheme;
    }
 
    public static function getAvailableThemes(): array {
        $path = DDDManager::getActiveViewFolder() . self::THEMES_FOLDER . \DS . '*';
        $dirs = \glob($path, GLOB_ONLYDIR | GLOB_NOSORT);
        $result = [];
        foreach ($dirs as $dir) {
            $result [] = \basename($dir);
        }
        return $result;
    }
 
    public static function getRefThemes(): array {
        return self::$refThemes;
    }
 
    public static function isCustom(string $theme): bool {
        return \array_search($theme, self::$refThemes) === false;
    }
 
    public static function getNotInstalledThemes(): array {
        $AvailableThemes = self::getAvailableThemes();
        return \array_diff(self::$refThemes, $AvailableThemes);
    }
 
    public static function onBeforeRender($callback) {
        EventsManager::addListener(ViewEvents::BEFORE_RENDER, $callback);
    }
 
    public static function onAfterRender($callback) {
        EventsManager::addListener(ViewEvents::AFTER_RENDER, $callback);
    }
}