]> git.mxchange.org Git - quix0rs-gnu-social.git/blob - actions/attachment.php
Twitter cards implementation. Currently only supports 'photo' cards.
[quix0rs-gnu-social.git] / actions / attachment.php
1 <?php
2 /**
3  * StatusNet, the distributed open-source microblogging tool
4  *
5  * Show notice attachments
6  *
7  * PHP version 5
8  *
9  * LICENCE: This program is free software: you can redistribute it and/or modify
10  * it under the terms of the GNU Affero General Public License as published by
11  * the Free Software Foundation, either version 3 of the License, or
12  * (at your option) any later version.
13  *
14  * This program is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17  * GNU Affero General Public License for more details.
18  *
19  * You should have received a copy of the GNU Affero General Public License
20  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
21  *
22  * @category  Personal
23  * @package   StatusNet
24  * @author    Evan Prodromou <evan@status.net>
25  * @copyright 2008-2009 StatusNet, Inc.
26  * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
27  * @link      http://status.net/
28  */
29
30 if (!defined('STATUSNET') && !defined('LACONICA')) {
31     exit(1);
32 }
33
34 require_once INSTALLDIR.'/lib/attachmentlist.php';
35
36 /**
37  * Show notice attachments
38  *
39  * @category Personal
40  * @package  StatusNet
41  * @author   Evan Prodromou <evan@status.net>
42  * @license  http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
43  * @link     http://status.net/
44  */
45 class AttachmentAction extends Action
46 {
47     /**
48      * Attachment object to show
49      */
50
51     var $attachment = null;
52
53     /**
54      * Load attributes based on database arguments
55      *
56      * Loads all the DB stuff
57      *
58      * @param array $args $_REQUEST array
59      *
60      * @return success flag
61      */
62
63     function prepare($args)
64     {
65         parent::prepare($args);
66
67         if ($id = $this->trimmed('attachment')) {
68             $this->attachment = File::getKV($id);
69         }
70
71         if (empty($this->attachment)) {
72             // TRANS: Client error displayed trying to get a non-existing attachment.
73             $this->clientError(_('No such attachment.'), 404);
74             return false;
75         }
76         return true;
77     }
78
79     /**
80      * Is this action read-only?
81      *
82      * @return boolean true
83      */
84     function isReadOnly($args)
85     {
86         return true;
87     }
88
89     /**
90      * Title of the page
91      *
92      * @return string title of the page
93      */
94     function title()
95     {
96         $a = new Attachment($this->attachment);
97         return $a->title();
98     }
99
100     function extraHead()
101     {
102         $this->element('link',array('rel'=>'alternate',
103             'type'=>'application/json+oembed',
104             'href'=>common_local_url(
105                 'oembed',
106                 array(),
107                 array('format'=>'json', 'url'=>
108                     common_local_url('attachment',
109                         array('attachment' => $this->attachment->id)))),
110             'title'=>'oEmbed'),null);
111         $this->element('link',array('rel'=>'alternate',
112             'type'=>'text/xml+oembed',
113             'href'=>common_local_url(
114                 'oembed',
115                 array(),
116                 array('format'=>'xml','url'=>
117                     common_local_url('attachment',
118                         array('attachment' => $this->attachment->id)))),
119             'title'=>'oEmbed'),null);
120         /* Twitter card support. See https://dev.twitter.com/docs/cards */
121         /* @fixme: should we display twitter cards only for attachments posted
122          *         by local users ? Seems mandatory to display twitter:creator
123          */
124         switch ($this->attachment->mimetype) {
125             case 'image/pjpeg':
126             case 'image/jpeg':
127             case 'image/jpg':
128             case 'image/png':
129             case 'image/gif':
130                 $this->element('meta', array('name'    => 'twitter:card',
131                                              'content' => 'photo'),
132                                        null);
133                 $this->element('meta', array('name'    => 'twitter:url',
134                                              'content' => common_local_url('attachment',
135                                                               array('attachment' => $this->attachment->id))),
136                                        null );
137                 $this->element('meta', array('name'    => 'twitter:image',
138                                              'content' => $this->attachment->url));
139
140                 $ns = new AttachmentNoticeSection($this);
141                 $notices = $ns->getNotices();
142                 $noticeArray = $notices->fetchAll();
143
144                 // Should not have more than 1 notice for this attachment.
145                 if( count($noticeArray) != 1 ) { break; }
146                 $post = $noticeArray[0];
147
148                 $flink = Foreign_link::getByUserID($post->profile_id, TWITTER_SERVICE);
149                 if( $flink ) { // Our local user has registered Twitter Gateway
150                     $fuser = Foreign_user::getForeignUser($flink->foreign_id, TWITTER_SERVICE);
151                     if( $fuser ) { // Got nickname for local user's Twitter account
152                         $this->element('meta', array('name'    => 'twitter:creator',
153                                                      'content' => '@'.$fuser->nickname));
154                     }
155                 }
156                 break;
157             default: break;
158         }
159     }
160
161     /**
162      * Handle input
163      *
164      * Only handles get, so just show the page.
165      *
166      * @param array $args $_REQUEST data (unused)
167      *
168      * @return void
169      */
170     function handle($args)
171     {
172         parent::handle($args);
173
174         if (empty($this->attachment->filename)) {
175
176             // if it's not a local file, gtfo
177
178             common_redirect($this->attachment->url, 303);
179
180         } else {
181             $this->showPage();
182         }
183     }
184
185     /**
186      * Fill the content area of the page
187      *
188      * Shows a single notice list item.
189      *
190      * @return void
191      */
192     function showContent()
193     {
194         $ali = new Attachment($this->attachment, $this);
195         $cnt = $ali->show();
196     }
197
198     /**
199      * Don't show page notice
200      *
201      * @return void
202      */
203     function showPageNoticeBlock()
204     {
205     }
206
207     /**
208      * Show aside: this attachments appears in what notices
209      *
210      * @return void
211      */
212     function showSections() {
213         $ns = new AttachmentNoticeSection($this);
214         $ns->show();
215         if (!common_config('performance', 'high')) {
216             $atcs = new AttachmentTagCloudSection($this);
217             $atcs->show();
218         }
219     }
220 }