<?php

namespace WpCafe;

defined( 'ABSPATH' ) || exit;

/**
 * Wp\Cafe autoloader.
 * Handles dynamically loading classes only when needed.
 *
 * @since 1.0.0
 */

 
class Autoloader {
    /**
     * Run autoloader.
     * Register a function as `__autoload()` implementation.
     *
     * @since 1.0.0
     * @access public
     */
    public static function run() {
        spl_autoload_register( [__CLASS__, 'autoload'] );
    }

    /**
     * Autoload.
     * For a given class, check if it exist and load it.
     *
     * @since 1.0.0
     * @access private
     * @param string $class Class name.
     */
    private static function autoload( $class_name ) {

        // If the class being requested does not start with our prefix
        // we know it's not one in our project.

        if ( 0 !== strpos( $class_name, __NAMESPACE__ ) ) {
            return;
        }

        $file_name = strtolower(
            preg_replace(
                ['/\b' . __NAMESPACE__ . '\\\/', '/([a-z])([A-Z])/', '/_/', '/\\\/'],
                ['', '$1-$2', '-', DIRECTORY_SEPARATOR],
                $class_name
            )
        );
        // Compile our path from the corresponding location.
        $file = plugin_dir_path( __FILE__ ) . $file_name . '.php';

        // If a file is found.
        if ( file_exists( $file ) ) {
            // Then load it up!
            require_once $file;
        }

    }

}