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[quix0rs-gnu-social.git] / actions / login.php
1 <?php
2 /*
3  * Laconica - a distributed open-source microblogging tool
4  * Copyright (C) 2008, Controlez-Vous, Inc.
5  *
6  * This program is free software: you can redistribute it and/or modify
7  * it under the terms of the GNU Affero General Public License as published by
8  * the Free Software Foundation, either version 3 of the License, or
9  * (at your option) any later version.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  * GNU Affero General Public License for more details.
15  *
16  * You should have received a copy of the GNU Affero General Public License
17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
18  */
19
20 if (!defined('LACONICA')) { exit(1); }
21
22 class LoginAction extends Action
23 {
24
25     function is_readonly()
26     {
27         return true;
28     }
29
30     function handle($args)
31     {
32         parent::handle($args);
33         if (common_is_real_login()) {
34             common_user_error(_('Already logged in.'));
35         } else if ($_SERVER['REQUEST_METHOD'] == 'POST') {
36             $this->check_login();
37         } else {
38             $this->show_form();
39         }
40     }
41
42     function check_login()
43     {
44         # XXX: login throttle
45
46         # CSRF protection - token set in common_notice_form()
47         $token = $this->trimmed('token');
48         if (!$token || $token != common_session_token()) {
49             $this->client_error(_('There was a problem with your session token. Try again, please.'));
50             return;
51         }
52
53         $nickname = common_canonical_nickname($this->trimmed('nickname'));
54         $password = $this->arg('password');
55         if (common_check_user($nickname, $password)) {
56             # success!
57             if (!common_set_user($nickname)) {
58                 common_server_error(_('Error setting user.'));
59                 return;
60             }
61             common_real_login(true);
62             if ($this->boolean('rememberme')) {
63                 common_debug('Adding rememberme cookie for ' . $nickname);
64                 common_rememberme();
65             }
66             # success!
67             $url = common_get_returnto();
68             if ($url) {
69                 # We don't have to return to it again
70                 common_set_returnto(null);
71             } else {
72                 $url = common_local_url('all',
73                                         array('nickname' =>
74                                               $nickname));
75             }
76             common_redirect($url);
77         } else {
78             $this->show_form(_('Incorrect username or password.'));
79             return;
80         }
81
82         # success!
83         if (!common_set_user($user)) {
84             common_server_error(_('Error setting user.'));
85             return;
86         }
87
88         common_real_login(true);
89
90         if ($this->boolean('rememberme')) {
91             common_debug('Adding rememberme cookie for ' . $nickname);
92             common_rememberme($user);
93         }
94         # success!
95         $url = common_get_returnto();
96         if ($url) {
97             # We don't have to return to it again
98             common_set_returnto(null);
99         } else {
100             $url = common_local_url('all',
101                                     array('nickname' =>
102                                           $nickname));
103         }
104         common_redirect($url);
105     }
106
107     function show_form($error=null)
108     {
109         common_show_header(_('Login'), null, $error, array($this, 'show_top'));
110         common_element_start('form', array('method' => 'post',
111                                            'id' => 'login',
112                                            'action' => common_local_url('login')));
113         common_input('nickname', _('Nickname'));
114         common_password('password', _('Password'));
115         common_checkbox('rememberme', _('Remember me'), false,
116                         _('Automatically login in the future; ' .
117                            'not for shared computers!'));
118         common_submit('submit', _('Login'));
119         common_hidden('token', common_session_token());
120         common_element_end('form');
121         common_element_start('p');
122         common_element('a', array('href' => common_local_url('recoverpassword')),
123                        _('Lost or forgotten password?'));
124         common_element_end('p');
125         common_show_footer();
126     }
127
128     function get_instructions()
129     {
130         if (common_logged_in() &&
131             !common_is_real_login() &&
132             common_get_returnto())
133         {
134             # rememberme logins have to reauthenticate before
135             # changing any profile settings (cookie-stealing protection)
136             return _('For security reasons, please re-enter your ' .
137                      'user name and password ' .
138                      'before changing your settings.');
139         } else {
140             return _('Login with your username and password. ' .
141                      'Don\'t have a username yet? ' .
142                      '[Register](%%action.register%%) a new account, or ' .
143                      'try [OpenID](%%action.openidlogin%%). ');
144         }
145     }
146
147     function show_top($error=null)
148     {
149         if ($error) {
150             common_element('p', 'error', $error);
151         } else {
152             $instr = $this->get_instructions();
153             $output = common_markup_to_html($instr);
154             common_element_start('div', 'instructions');
155             common_raw($output);
156             common_element_end('div');
157         }
158     }
159 }