<?php
/**
 * GoogleAnalytics Autoloader.
 *
 * @package GoogleAnalytics
 */

/**
 * Autoloader class.
 */
class Ga_Autoloader {
	/**
	 * Registers clas loader.
	 */
	public static function register() {
		spl_autoload_register( 'Ga_Autoloader::loader' );
	}

	/**
	 * Class loader.
	 *
	 * @param string $class_name Class name string.
	 */
	private static function loader( $class_name ) {
		$class_slug = 'class-' . str_replace( '_', '-', sanitize_title( $class_name ) );

		// Core classes.
		if ( preg_match( '/_Core/', $class_name ) ) {
			$file_name = GA_PLUGIN_DIR . '/class/core/' . $class_slug . '.php';
			if ( file_exists( $file_name ) ) {
				require $file_name;
			}
		}

		// Controllers.
		if ( preg_match( '/_Controller/', $class_name ) ) {
			$file_name = GA_PLUGIN_DIR . '/class/controller/' . $class_slug . '.php';
			if ( file_exists( $file_name ) ) {
				require $file_name;
			}
		}

		// Classes.
		$file_name = GA_PLUGIN_DIR . '/class/' . $class_slug . '.php';
		if ( file_exists( $file_name ) ) {
			require $file_name;
		}

		// Tools.
		$file_name_tools = GA_PLUGIN_DIR . '/tools/' . $class_slug . '.php';
		if ( file_exists( $file_name_tools ) ) {
			require $file_name_tools;
		}

		// Libs.
		if ( preg_match( '/Ga_Lib/', $class_name ) ) {
			$file_name = GA_PLUGIN_DIR . '/lib/' . $class_slug . '.php';
			if ( file_exists( $file_name ) ) {
				require $file_name;
			}
		}
	}
}