la-restaurant-theme/source/functions/view.php

<?php

namespace la_restaurant_theme;

require_once('renderer.php');

class view {
    public function __construct(private string $path) {
        if (!$this->exists()) {
            throw new ErrorException('View "'.$path.'" not exists.');
        }
    }

    public function exists(): bool {
        return is_file($this->path);
    }

    private function read(): string {
        $file = fopen($this->path, 'r');
        $size = filesize($this->path);
        
        if ($file === false) {
            throw new ErrorException('View "'.$path.'" is not readable.');
        }

        $content = fread($file, $size);
        fclose($file);

        return $content;
    }

    public function rendering(): renderer {
        static $content = null;

        if ($content === null) {
            $content = $this->read();
        }

        return new renderer($content);
    }
}