PHP Template Trait

<?php declare(strict_types = 1);

namespace Xxxxxx\Support\Unit\Traits;

use Jenssegers\Blade\Blade;

use Exception;
use ReflectionObject;

trait TemplateTrait
{
    protected ?Blade $template = null;

    protected ?string $dir = null;

    protected ?string $templateDir = null;

    protected ?string $templateCacheDir = null;

    protected string $viewName = '';

    private static $instance = null;


    /**
     * getDir
     *
     * @return string
     */
    public function getDir(): string
    {
        return $this->dir;
    }

    /**
     * getTemplateDir
     *
     * @return string
     */
    public function getTemplateDir(): string
    {
        return $this->templateDir;
    }

    /**
     * setViewName
     *
     * @return string
     */
    public function setViewName(string $viewName): void
    {
        $this->viewName = $viewName;
    }

    /**
     * getViewName
     *
     * @return string
     */
    public function getViewName(): string
    {
        return $this->viewName;
    }


    /**
     * instance
     *
     * @return static::class
     */
    public static function instance()
    {
        if (static::$instance === null) {
            $instance = new static();

            static::$instance = $instance;
        }

        return static::$instance;
    }

    /**
     * view
     *
     * @param  mixed $viewName
     * @return void
     */
    public function view(string $viewName)
    {
        $this->setViewName($viewName);

        if (!file_exists($this->getTemplateDir() . '/'. $this->getViewName())) throw new Exception('Template  '.$viewName.' does not exists.');

        return $this;
    }

    /**
     * getInstanceObjectFilePath
     *
     * @return string
     */
    public function getInstanceObjectFilePath(): string
    {
        return plugin_dir_path((new ReflectionObject($this))->getFilename());
    }

    /**
     * template
     *
     * @return void
     */
    public function template()
    {
        $this->dir = $this->getInstanceObjectFilePath();
        $this->templateDir = $this->dir . 'Views';
        $this->templateCacheDir = $this->dir . 'Views/Cache';

        if (!is_dir($this->templateDir))        throw new Exception('Views directory does not exists at: ' . $this->dir);
        if (!is_dir($this->templateCacheDir))   throw new Exception('Views/Cache directory does not exists at: ' . $this->dir);

        $this->template = new Blade(
            $this->templateDir,
            $this->templateCacheDir,
        );

        if ($this->template === null) throw new Exception('Template was not initialized');

        return $this;
    }

    /**
     * render
     *
     * @param  mixed $arguments
     * @return void
     */
    public function render(array $arguments): void
    {
        print $this->template->render(
            $this->getViewName(),
            $arguments,
        );

        return;
    }
}