<?php
/**
 * SureFeedback File Uploads Extension Autoloader.
 *
 * @package PHFileUploads/Classes
 * @version 1.0.0
 */

defined( 'ABSPATH' ) || exit;

/**
 * Autoloader class.
 */
class PH_PDF_Autoloader {
	/**
	 * Path to the includes directory.
	 *
	 * @var string
	 */
	private $include_path = '';

	/**
	 * The Constructor.
	 */
	public function __construct() {
		if ( function_exists( '__autoload' ) ) {
			spl_autoload_register( '__autoload' );
		}
		spl_autoload_register( array( $this, 'autoload' ) );
		$this->include_path = untrailingslashit( PH_UPLOADS_PLUGIN_DIR ) . '/includes/';
	}

	/**
	 * Take a class name and turn it into a file name.
	 *
	 * @param  string $class Class name.
	 *
	 * @return string
	 */
	private function get_file_name_from_class( $class ) {
		return 'class-' . str_replace( '_', '-', $class ) . '.php';
	}

	/**
	 * Include a class file.
	 *
	 * @param  string $path File path.
	 *
	 * @return bool Successful or not.
	 */
	private function load_file( $path ) {
		if ( $path && is_readable( $path ) ) {
			include_once $path;

			return true;
		}

		return false;
	}

	/**
	 * Auto-load WC classes on demand to reduce memory consumption.
	 *
	 * @param string $class Class name.
	 */
	public function autoload( $class ) {
		$class = strtolower( $class );

		// must have our prefix.
		if ( 0 !== strpos( $class, 'phf_' ) ) {
			return;
		}

		$file = $this->get_file_name_from_class( $class );

		$path = '';

		// include file.
		if ( empty( $path ) || ! $this->load_file( $path . $file ) ) {
			$this->load_file( $this->include_path . $file );
		}
	}
}

// run autoloader.
new PH_PDF_Autoloader();
