plugins/OStatus/actions/ostatusinit.php

   1 <?php
   2 /*
   3  * StatusNet - the distributed open-source microblogging tool
   4  * Copyright (C) 2010, StatusNet, 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 /**
  21  * @package OStatusPlugin
  22  * @maintainer James Walker <james@status.net>
  23  */
  24
  25 if (!defined('STATUSNET') && !defined('LACONICA')) { exit(1); }
  26
  27
  28 class OStatusInitAction extends Action
  29 {
  30     var $nickname;
  31     var $group;
  32     var $profile;
  33     var $err;
  34
  35     function prepare($args)
  36     {
  37         parent::prepare($args);
  38
  39         if (common_logged_in()) {
  40             // TRANS: Client error.
  41             $this->clientError(_m('You can use the local subscription!'));
  42             return false;
  43         }
  44
  45         // Local user or group the remote wants to subscribe to
  46         $this->nickname = $this->trimmed('nickname');
  47         $this->group = $this->trimmed('group');
  48
  49         // Webfinger or profile URL of the remote user
  50         $this->profile = $this->trimmed('profile');
  51
  52         return true;
  53     }
  54
  55     function handle($args)
  56     {
  57         parent::handle($args);
  58
  59         if ($_SERVER['REQUEST_METHOD'] == 'POST') {
  60             /* Use a session token for CSRF protection. */
  61             $token = $this->trimmed('token');
  62             if (!$token || $token != common_session_token()) {
  63                 $this->showForm(_m('There was a problem with your session token. '.
  64                                   'Try again, please.'));
  65                 return;
  66             }
  67             $this->ostatusConnect();
  68         } else {
  69             $this->showForm();
  70         }
  71     }
  72
  73     function showForm($err = null)
  74     {
  75         $this->err = $err;
  76         if ($this->boolean('ajax')) {
  77             header('Content-Type: text/xml;charset=utf-8');
  78             $this->xw->startDocument('1.0', 'UTF-8');
  79             $this->elementStart('html');
  80             $this->elementStart('head');
  81             // TRANS: Form title.
  82             $this->element('title', null, _m('Subscribe to user'));
  83             $this->elementEnd('head');
  84             $this->elementStart('body');
  85             $this->showContent();
  86             $this->elementEnd('body');
  87             $this->elementEnd('html');
  88         } else {
  89             $this->showPage();
  90         }
  91     }
  92
  93     function showContent()
  94     {
  95         if ($this->group) {
  96             // TRANS: Form legend.
  97             $header = sprintf(_m('Join group %s'), $this->group);
  98             // TRANS: Button text.
  99             $submit = _m('BUTTON','Join');
 100         } else {
 101             // TRANS: Form legend.
 102             $header = sprintf(_m('Subscribe to %s'), $this->nickname);
 103             // TRANS: Button text.
 104             $submit = _m('BUTTON','Subscribe');
 105         }
 106         $this->elementStart('form', array('id' => 'form_ostatus_connect',
 107                                           'method' => 'post',
 108                                           'class' => 'form_settings',
 109                                           'action' => common_local_url('ostatusinit')));
 110         $this->elementStart('fieldset');
 111         $this->element('legend', null,  $header);
 112         $this->hidden('token', common_session_token());
 113
 114         $this->elementStart('ul', 'form_data');
 115         $this->elementStart('li', array('id' => 'ostatus_nickname'));
 116         // TRANS: Field label.
 117         $this->input('nickname', _m('User nickname'), $this->nickname,
 118                      _m('Nickname of the user you want to follow.'));
 119         $this->hidden('group', $this->group); // pass-through for magic links
 120         $this->elementEnd('li');
 121         $this->elementStart('li', array('id' => 'ostatus_profile'));
 122         // TRANS: Field label.
 123         $this->input('profile', _m('Profile Account'), $this->profile,
 124                       // TRANS: Tooltip for field label "Profile Account".
 125                      _m('Your account id (e.g. user@identi.ca).'));
 126         $this->elementEnd('li');
 127         $this->elementEnd('ul');
 128         $this->submit('submit', $submit);
 129         $this->elementEnd('fieldset');
 130         $this->elementEnd('form');
 131     }
 132
 133     function ostatusConnect()
 134     {
 135         $opts = array('allowed_schemes' => array('http', 'https', 'acct'));
 136         if (Validate::uri($this->profile, $opts)) {
 137             $bits = parse_url($this->profile);
 138             if ($bits['scheme'] == 'acct') {
 139                 $this->connectWebfinger($bits['path']);
 140             } else {
 141                 $this->connectProfile($this->profile);
 142             }
 143         } elseif (strpos($this->profile, '@') !== false) {
 144             $this->connectWebfinger($this->profile);
 145         } else {
 146             // TRANS: Client error.
 147             $this->clientError(_m("Must provide a remote profile."));
 148         }
 149     }
 150
 151     function connectWebfinger($acct)
 152     {
 153         $target_profile = $this->targetProfile();
 154
 155         $disco = new Discovery;
 156         $result = $disco->lookup($acct);
 157         if (!$result) {
 158             // TRANS: Client error.
 159             $this->clientError(_m("Couldn't look up OStatus account profile."));
 160         }
 161
 162         foreach ($result->links as $link) {
 163             if ($link['rel'] == 'http://ostatus.org/schema/1.0/subscribe') {
 164                 // We found a URL - let's redirect!
 165                 $url = Discovery::applyTemplate($link['template'], $target_profile);
 166                 common_log(LOG_INFO, "Sending remote subscriber $acct to $url");
 167                 common_redirect($url, 303);
 168             }
 169
 170         }
 171         // TRANS: Client error.
 172         $this->clientError(_m("Couldn't confirm remote profile address."));
 173     }
 174
 175     function connectProfile($subscriber_profile)
 176     {
 177         $target_profile = $this->targetProfile();
 178
 179         // @fixme hack hack! We should look up the remote sub URL from XRDS
 180         $suburl = preg_replace('!^(.*)/(.*?)$!', '$1/main/ostatussub', $subscriber_profile);
 181         $suburl .= '?profile=' . urlencode($target_profile);
 182
 183         common_log(LOG_INFO, "Sending remote subscriber $subscriber_profile to $suburl");
 184         common_redirect($suburl, 303);
 185     }
 186
 187     /**
 188      * Build the canonical profile URI+URL of the requested user or group
 189      */
 190     function targetProfile()
 191     {
 192         if ($this->nickname) {
 193             $user = User::staticGet('nickname', $this->nickname);
 194             if ($user) {
 195                 return common_local_url('userbyid', array('id' => $user->id));
 196             } else {
 197                 // TRANS: Client error.
 198                 $this->clientError("No such user.");
 199             }
 200         } else if ($this->group) {
 201             $group = Local_group::staticGet('nickname', $this->group);
 202             if ($group) {
 203                 return common_local_url('groupbyid', array('id' => $group->group_id));
 204             } else {
 205                 // TRANS: Client error.
 206                 $this->clientError("No such group.");
 207             }
 208         } else {
 209             // TRANS: Client error.
 210             $this->clientError("No local user or group nickname provided.");
 211         }
 212     }
 213
 214     function title()
 215     {
 216       // TRANS: Page title.
 217       return _m('OStatus Connect');
 218     }
 219 }