<?php
	function user_exists($name) {
		if(file_exists('name/' . $name)) {
			return true;
		} else {
			return false;
		}
	}

	function user_create($name, $password, $power) {
		if(user_exists($name)) {
			return array('success' => false, 'error' => 'user already exists');
		} else {
			$user_folder = 'name/' . $name . '/';
			$id = users_get_count();
			for($i = strlen($id); $i < 4; $i++) {
				$id = '0' . $id;
			}
			mkdir($user_folder, 0777);
			$file_handle = fopen($user_folder . 'id', 'w');
			fwrite($file_handle, $id);
			fclose($file_handle);
			$file_handle = fopen($user_folder . 'power', 'w');
			fwrite($file_handle, $power);
			fclose($file_handle);
			$file_handle = fopen('hash/' . sha1($id . '_' . $name . ':' . $password), 'w');
			fwrite($file_handle, '');
			fclose($file_handle);
			return array('success' => true);
		}
	}

	function user_remove($name, $password) {
		if(! user_exists($name)) {
			return array('success' => false, 'error' => 'user doesn\'t exist');
		}
		$hash = sha1(user_get_id($name) . '_' . $name . ':' . $password);
		if(! file_exists('hash/' . $hash)) {
			return array('success' => false, 'error' => 'password is incorrect');
		} else {
			require 'utils.php';
			recursive_rmdir('name/' . $name);
			unlink('hash/' . $hash);
			return array('success' => true);
		}
	}

	function user_get_id($name) {
		if(! user_exists($name)) {
			return array('success' => false, 'error' => 'user doesn\'t exist');
		} else {
			$user_folder = 'name/' . $name . '/';
			$file_handle = fopen($user_folder . 'id', 'r');
			$id = fread($file_handle, filesize($user_folder . 'id'));
			fclose($file_handle);
			return $id;
		}
	}

	/*function user_get_power(name) {
	}*/

	function users_get_count() {
		$count = count(array_filter(glob('name/*'), 'is_dir'));;
		return $count;
	}
?>