<?php
/**
 * Base for base models
 */

/**
 * Common base for all Models
 */
class BaseModel {

	/**
	 * The global configuration object
	 * @var object $config
	 */
	protected $config;

	/**
	 * Constructor
	 */
	public function __construct()
	{
		global $config;
		$this->config = $config;
	}

	/**
	 * Get the path of the cached version of the image. Create the cached image
	 * if the file does not already exist
	 *
	 * @param string $api_path - The original image url
	 * @param string $series_slug - The part of the url with the series name, becomes the image name
	 * @param string $type - Anime or Manga, controls cache path
	 * @return string - the frontend path for the cached image
	 */
	public function get_cached_image($api_path, $series_slug, $type="anime")
	{
		$path_parts = explode('?', basename($api_path));
		$path = current($path_parts);
		$ext_parts = explode('.', $path);
		$ext = end($ext_parts);
		
		// Workaround for some broken extensions
		if ($ext == "jjpg") $ext = "jpg";
		
		// Failsafe for weird urls
		if (strlen($ext) > 3) return $api_path;

		$cached_image = "{$series_slug}.{$ext}";
		$cached_path = "{$this->config->img_cache_path}/{$type}/{$cached_image}";

		// Cache the file if it doesn't already exist
		if ( ! file_exists($cached_path))
		{
			if (ini_get('allow_url_fopen'))
			{
				copy($api_path, $cached_path);
			}
			elseif (function_exists('curl_init'))
			{
				$ch = curl_init($api_path);
				$fp = fopen($cached_path, 'wb');
				curl_setopt_array($ch, [
					CURLOPT_FILE => $fp,
					CURLOPT_HEADER => 0
				]);
				curl_exec($ch);
				curl_close($ch);
				fclose($ch);
			}
			else
			{
				throw new Exception("Couldn't cache images because they couldn't be downloaded.");
			}
		}

		return "/public/images/{$type}/{$cached_image}";
	}
}
// End of BaseModel.php