<?php
namespace Opencart\Admin\Model\Tool;
/**
 * Class Image
 *
 * Can be loaded using $this->load->model('tool/image');
 *
 * @package Opencart\Admin\Model\Tool
 */
class Image extends \Opencart\System\Engine\Model {
	/**
	 * Resize
	 *
	 * @param string $filename
	 * @param int    $width
	 * @param int    $height
	 *
	 * @throws \Exception
	 *
	 * @return string
	 *
	 * @example
	 *
	 * $this->load->model('tool/image');
	 *
	 * $placeholder = $this->model_tool_image->resize($filename, $width, $height);
	 */
	public function resize(string $filename, int $width, int $height): string {
		$filename = html_entity_decode($filename, ENT_QUOTES, 'UTF-8');

		if (!is_file(DIR_IMAGE . $filename) || substr(str_replace('\\', '/', realpath(DIR_IMAGE . $filename)), 0, strlen(DIR_IMAGE)) != DIR_IMAGE) {
			return '';
		}

		$extension = pathinfo($filename, PATHINFO_EXTENSION);

		$image_old = $filename;
		$image_new = 'cache/' . oc_substr($filename, 0, oc_strrpos($filename, '.')) . '-' . $width . 'x' . $height . '.' . $extension;

		if (!is_file(DIR_IMAGE . $image_new) || (filemtime(DIR_IMAGE . $image_old) > filemtime(DIR_IMAGE . $image_new))) {
			[$width_orig, $height_orig, $image_type] = getimagesize(DIR_IMAGE . $image_old);

			if (!in_array($image_type, [IMAGETYPE_PNG, IMAGETYPE_JPEG, IMAGETYPE_GIF, IMAGETYPE_WEBP])) {
				return HTTP_CATALOG . 'image/' . $image_old;
			}

			$path = '';

			$directories = explode('/', dirname($image_new));

			foreach ($directories as $directory) {
				if (!$path) {
					$path = $directory;
				} else {
					$path = $path . '/' . $directory;
				}

				if (!is_dir(DIR_IMAGE . $path)) {
					@mkdir(DIR_IMAGE . $path, 0777);
				}
			}

			if ($width_orig != $width || $height_orig != $height) {
				$image = new \Opencart\System\Library\Image(DIR_IMAGE . $image_old);
				$image->resize($width, $height);
				$image->save(DIR_IMAGE . $image_new);
			} else {
				copy(DIR_IMAGE . $image_old, DIR_IMAGE . $image_new);
			}
		}

		return HTTP_CATALOG . 'image/' . $image_new;
	}
}