<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.

/**
 * Authentication related tests.
 *
 * @package    core_auth
 * @category   phpunit
 * @copyright  2012 Petr Skoda {@link http://skodak.org}
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

defined('MOODLE_INTERNAL') || die();


/**
 * Functional test for authentication related APIs.
 */
class core_authlib_testcase extends advanced_testcase {
    public function test_lockout() {
        global $CFG;
        require_once("$CFG->libdir/authlib.php");

        $this->resetAfterTest();

        $oldlog = ini_get('error_log');
        ini_set('error_log', "$CFG->dataroot/testlog.log"); // Prevent standard logging.

        unset_config('noemailever');

        set_config('lockoutthreshold', 0);
        set_config('lockoutwindow', 60*20);
        set_config('lockoutduration', 60*30);

        $user = $this->getDataGenerator()->create_user();

        // Test lockout is disabled when threshold not set.

        $this->assertFalse(login_is_lockedout($user));
        login_attempt_failed($user);
        login_attempt_failed($user);
        login_attempt_failed($user);
        login_attempt_failed($user);
        $this->assertFalse(login_is_lockedout($user));

        // Test lockout threshold works.

        set_config('lockoutthreshold', 3);
        login_attempt_failed($user);
        login_attempt_failed($user);
        $this->assertFalse(login_is_lockedout($user));
        $sink = $this->redirectEmails();
        login_attempt_failed($user);
        $this->assertCount(1, $sink->get_messages());
        $sink->close();
        $this->assertTrue(login_is_lockedout($user));

        // Test unlock works.

        login_unlock_account($user);
        $this->assertFalse(login_is_lockedout($user));

        // Test lockout window works.

        login_attempt_failed($user);
        login_attempt_failed($user);
        $this->assertFalse(login_is_lockedout($user));
        set_user_preference('login_failed_last', time()-60*20-10, $user);
        login_attempt_failed($user);
        $this->assertFalse(login_is_lockedout($user));

        // Test valid login resets window.

        login_attempt_valid($user);
        $this->assertFalse(login_is_lockedout($user));
        login_attempt_failed($user);
        login_attempt_failed($user);
        $this->assertFalse(login_is_lockedout($user));

        // Test lock duration works.

        $sink = $this->redirectEmails();
        login_attempt_failed($user);
        $this->assertCount(1, $sink->get_messages());
        $sink->close();
        $this->assertTrue(login_is_lockedout($user));
        set_user_preference('login_lockout', time()-60*30+10, $user);
        $this->assertTrue(login_is_lockedout($user));
        set_user_preference('login_lockout', time()-60*30-10, $user);
        $this->assertFalse(login_is_lockedout($user));

        // Test lockout ignored pref works.

        set_user_preference('login_lockout_ignored', 1, $user);
        login_attempt_failed($user);
        login_attempt_failed($user);
        login_attempt_failed($user);
        login_attempt_failed($user);
        $this->assertFalse(login_is_lockedout($user));

        ini_set('error_log', $oldlog);
    }

    public function test_authenticate_user_login() {
        global $CFG;

        $this->resetAfterTest();

        $oldlog = ini_get('error_log');
        ini_set('error_log', "$CFG->dataroot/testlog.log"); // Prevent standard logging.

        unset_config('noemailever');

        set_config('lockoutthreshold', 0);
        set_config('lockoutwindow', 60*20);
        set_config('lockoutduration', 60*30);

        $_SERVER['HTTP_USER_AGENT'] = 'no browser'; // Hack around missing user agent in CLI scripts.

        $user1 = $this->getDataGenerator()->create_user(array('username'=>'username1', 'password'=>'password1'));
        $user2 = $this->getDataGenerator()->create_user(array('username'=>'username2', 'password'=>'password2', 'suspended'=>1));
        $user3 = $this->getDataGenerator()->create_user(array('username'=>'username3', 'password'=>'password3', 'auth'=>'nologin'));

        $result = authenticate_user_login('username1', 'password1');
        $this->assertInstanceOf('stdClass', $result);
        $this->assertEquals($user1->id, $result->id);

        $reason = null;
        $result = authenticate_user_login('username1', 'password1', false, $reason);
        $this->assertInstanceOf('stdClass', $result);
        $this->assertEquals(AUTH_LOGIN_OK, $reason);

        $reason = null;
        $result = authenticate_user_login('username1', 'nopass', false, $reason);
        $this->assertFalse($result);
        $this->assertEquals(AUTH_LOGIN_FAILED, $reason);

        $reason = null;
        $result = authenticate_user_login('username2', 'password2', false, $reason);
        $this->assertFalse($result);
        $this->assertEquals(AUTH_LOGIN_SUSPENDED, $reason);

        $reason = null;
        $result = authenticate_user_login('username3', 'password3', false, $reason);
        $this->assertFalse($result);
        $this->assertEquals(AUTH_LOGIN_SUSPENDED, $reason);

        $reason = null;
        $result = authenticate_user_login('username4', 'password3', false, $reason);
        $this->assertFalse($result);
        $this->assertEquals(AUTH_LOGIN_NOUSER, $reason);

        set_config('lockoutthreshold', 3);

        $reason = null;
        $result = authenticate_user_login('username1', 'nopass', false, $reason);
        $this->assertFalse($result);
        $this->assertEquals(AUTH_LOGIN_FAILED, $reason);
        $result = authenticate_user_login('username1', 'nopass', false, $reason);
        $this->assertFalse($result);
        $this->assertEquals(AUTH_LOGIN_FAILED, $reason);
        $sink = $this->redirectEmails();
        $result = authenticate_user_login('username1', 'nopass', false, $reason);
        $this->assertCount(1, $sink->get_messages());
        $sink->close();
        $this->assertFalse($result);
        $this->assertEquals(AUTH_LOGIN_FAILED, $reason);

        $result = authenticate_user_login('username1', 'password1', false, $reason);
        $this->assertFalse($result);
        $this->assertEquals(AUTH_LOGIN_LOCKOUT, $reason);

        $result = authenticate_user_login('username1', 'password1', true, $reason);
        $this->assertInstanceOf('stdClass', $result);
        $this->assertEquals(AUTH_LOGIN_OK, $reason);

        ini_set('error_log', $oldlog);
    }

    public function test_user_loggedin_event_exceptions() {
        try {
            $event = \core\event\user_loggedin::create(array('objectid' => 1));
            $this->fail('\core\event\user_loggedin requires other[\'username\']');
        } catch(Exception $e) {
            $this->assertInstanceOf('coding_exception', $e);
        }

        try {
            $event = \core\event\user_loggedin::create(array('other' => array('username' => 'test')));
            $this->fail('\core\event\user_loggedin requires objectid');
        } catch(Exception $e) {
            $this->assertInstanceOf('coding_exception', $e);
        }
    }

}