<?php
/**
 * Autoloader
 *
 * @package SimpleCalendar
 */

if (!defined('ABSPATH')) {
	exit();
}

if (!function_exists('SimpleCalendar_Autoload')) {
	/**
	 * Plugin autoloader.
	 *
	 * Pattern (with or without <Subnamespace>):
	 *  <Namespace>/<Subnamespace>.../Class_Name (or Classname)
	 *  'includes/subdir.../class-name.php' or '...classname.php'
	 *
	 * @since 3.0.0
	 *
	 * @param $class
	 */
	function SimpleCalendar_Autoload($class)
	{
		// Do not load unless in plugin domain.
		$namespace = 'SimpleCalendar';
		if (strpos($class, $namespace) !== 0) {
			return;
		}

		// Converts Class_Name (class convention) to class-name (file convention).
		$class_name = implode('-', array_map('lcfirst', explode('_', strtolower($class))));

		// Remove the root namespace.
		$unprefixed = substr($class_name, strlen($namespace));

		// Build the file path.
		$file_path = str_replace('\\', DIRECTORY_SEPARATOR, $unprefixed);
		$file = dirname(__FILE__) . '/' . $file_path . '.php';

		if (file_exists($file)) {
			require $file;
		}
	}

	// Register the autoloader.
	spl_autoload_register('SimpleCalendar_Autoload');
}