xref: /plugin/discussion/action.php (revision c394344276c539677e429752137d54dfd9f5d811) 
1<?php
2/**
3 * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
4 * @author     Esther Brunner <wikidesign@gmail.com>
5 */
6
7// must be run within Dokuwiki
8if (!defined('DOKU_INC')) die();
9
10if (!defined('DOKU_PLUGIN')) define('DOKU_PLUGIN',DOKU_INC.'lib/plugins/');
11require_once(DOKU_PLUGIN.'action.php');
12
13if (!defined('NL')) define('NL',"\n");
14
15class action_plugin_discussion extends DokuWiki_Action_Plugin{
16
17  /**
18   * Return some info
19   */
20  function getInfo(){
21    return array(
22      'author' => 'Esther Brunner',
23      'email'  => 'wikidesign@gmail.com',
24      'date'   => '2006-12-20',
25      'name'   => 'Discussion Plugin',
26      'desc'   => 'Enables discussion features',
27      'url'    => 'http://www.wikidesign.ch/en/plugin/discussion/start',
28    );
29  }
30
31  /**
32   * Register the eventhandlers
33   */
34  function register(&$contr){
35    $contr->register_hook(
36      'ACTION_ACT_PREPROCESS',
37      'BEFORE',
38      $this,
39      'handle_act_preprocess',
40      array()
41    );
42    $contr->register_hook(
43      'TPL_ACT_RENDER',
44      'AFTER',
45      $this,
46      'comments',
47      array()
48    );
49    $contr->register_hook(
50      'RENDERER_CONTENT_POSTPROCESS',
51      'AFTER',
52      $this,
53      'add_toc_item',
54      array()
55    );
56  }
57
58  /**
59   * Main function; dispatches the comment actions
60   */
61  function comments(&$event, $param){
62    if ($event->data != 'show') return; // nothing to do for us
63
64    $cid  = $_REQUEST['cid'];
65
66    switch ($_REQUEST['comment']){
67
68      case 'add':
69        $comment = array(
70          'user'    => $_REQUEST['user'],
71          'name'    => $_REQUEST['name'],
72          'mail'    => $_REQUEST['mail'],
73          'url'     => $_REQUEST['url'],
74          'address' => $_REQUEST['address'],
75          'date'    => $_REQUEST['date'],
76          'raw'     => cleanText($_REQUEST['text'])
77        );
78        $repl = $_REQUEST['reply'];
79        $this->_add($comment, $repl);
80        break;
81
82      case 'edit':
83        $this->_show(NULL, $cid);
84        break;
85
86      case 'save':
87        $raw  = cleanText($_REQUEST['text']);
88        $this->_save($cid, $raw);
89        break;
90
91      case 'delete':
92        $this->_save($cid, '');
93        break;
94
95      case 'toogle':
96        $this->_save($cid, '', true);
97        break;
98
99      default: // 'show' => $this->_show(), 'reply' => $this->_show($cid)
100        $this->_show($cid);
101    }
102  }
103
104  /**
105   * Shows all comments of the current page
106   */
107  function _show($reply = NULL, $edit = NULL){
108    global $ID, $INFO;
109
110    // get .comments meta file name
111    $file = metaFN($ID, '.comments');
112
113    if (!@file_exists($file)){
114      // create .comments meta file if automatic setting is switched on
115      if ($this->getConf('automatic') && $INFO['exists']){
116        $data = array('status' => 1, 'number' => 0);
117        io_saveFile($file, serialize($data));
118      }
119    } else { // load data
120      $data = unserialize(io_readFile($file, false));
121    }
122
123    if (!$data['status']) return false; // comments are turned off
124
125    // section title
126    $title = $this->getLang('discussion');
127    echo '<div class="comment_wrapper">';
128    echo '<h2><a name="discussion__section" id="discussion__section">'.$title.'</a></h2>';
129    echo '<div class="level2">';
130
131    // now display the comments
132    if (isset($data['comments'])){
133      foreach ($data['comments'] as $key => $value){
134        if ($key == $edit) $this->_form($value['raw'], 'save', $edit); // edit form
135        else $this->_print($key, $data, '', $reply);
136      }
137    }
138
139    // comment form
140    if (($data['status'] == 1) && !$reply && !$edit) $this->_form('');
141
142    echo '</div>'; // level2
143    echo '</div>'; // comment_wrapper
144
145    return true;
146  }
147
148  /**
149   * Adds a new comment and then displays all comments
150   */
151  function _add($comment, $parent){
152    global $ID;
153    global $TEXT;
154
155    $otxt = $TEXT; // set $TEXT to comment text for wordblock check
156    $TEXT = $comment['raw'];
157
158    // spamcheck against the DokuWiki blacklist
159    if (checkwordblock()){
160      msg($this->getLang('wordblock'), -1);
161      $this->_show();
162      return false;
163    }
164
165    $TEXT = $otxt; // restore global $TEXT
166
167    // get discussion meta file name
168    $file = metaFN($ID, '.comments');
169
170    $data = array();
171    $data = unserialize(io_readFile($file, false));
172
173    if ($data['status'] != 1) return false;                // comments off or closed
174    if ((!$this->getConf('allowguests'))
175      && ($comment['user'] != $_SERVER['REMOTE_USER']))
176      return false;                                        // guest comments not allowed
177
178    if ($comment['date']) $date = strtotime($comment['date']);
179    else $date = time();
180    if ($date == -1) $date = time();
181    $cid  = md5($comment['user'].$date);                   // create a unique id
182
183    if (!is_array($data['comments'][$parent])) $parent = NULL; // invalid parent comment
184
185    // render the comment
186    $xhtml = $this->_render($comment['raw']);
187
188    // fill in the new comment
189    $data['comments'][$cid] = array(
190      'user'    => htmlspecialchars($comment['user']),
191      'name'    => htmlspecialchars($comment['name']),
192      'mail'    => htmlspecialchars($comment['mail']),
193      'date'    => $date,
194      'show'    => true,
195      'raw'     => trim($comment['raw']),
196      'xhtml'   => $xhtml,
197      'parent'  => $parent,
198      'replies' => array()
199    );
200    if ($comment['url'])
201      $data['comments'][$cid]['url'] = htmlspecialchars($comment['url']);
202    if ($comment['address'])
203      $data['comments'][$cid]['address'] = htmlspecialchars($comment['address']);
204
205    // update parent comment
206    if ($parent) $data['comments'][$parent]['replies'][] = $cid;
207
208    // update the number of comments
209    $data['number']++;
210
211    // save the comment metadata file
212    io_saveFile($file, serialize($data));
213    $this->_addLogEntry($date, $ID, 'cc', '', $cid);
214
215    // notify subscribers of the page
216    $this->_notify($data['comments'][$cid]);
217
218    $this->_show();
219    return true;
220  }
221
222  /**
223   * Saves the comment with the given ID and then displays all comments
224   */
225  function _save($cid, $raw, $toogle = false){
226    global $ID;
227    global $INFO;
228
229    if ($raw){
230      global $TEXT;
231
232      $otxt = $TEXT; // set $TEXT to comment text for wordblock check
233      $TEXT = $raw;
234
235      // spamcheck against the DokuWiki blacklist
236      if (checkwordblock()){
237        msg($this->getLang('wordblock'), -1);
238        $this->_show();
239        return false;
240      }
241
242      $TEXT = $otxt; // restore global $TEXT
243    }
244
245    // get discussion meta file name
246    $file = metaFN($ID, '.comments');
247
248    $data = array();
249    $data = unserialize(io_readFile($file, false));
250
251    // someone else was trying to edit our comment -> abort
252    if (($data['comments'][$cid]['user'] != $_SERVER['REMOTE_USER'])
253      && ($INFO['perm'] != AUTH_ADMIN)) return false;
254
255    $date = time();
256
257    if ($toogle){     // toogle visibility
258      $now = $data['comments'][$cid]['show'];
259      $data['comments'][$cid]['show'] = !$now;
260      $data['number'] = $this->_count($data);
261
262      $type = ($data['comments'][$cid]['show'] ? 'sc' : 'hc');
263
264    } elseif (!$raw){ // remove the comment
265      unset($data['comments'][$cid]);
266      $data['number'] = $this->_count($data);
267
268      $type = 'dc';
269
270    } else {          // save changed comment
271      $xhtml = $this->_render($raw);
272
273      // now change the comment's content
274      $data['comments'][$cid]['edited'] = $date;
275      $data['comments'][$cid]['raw']    = trim($raw);
276      $data['comments'][$cid]['xhtml']  = $xhtml;
277
278      $type = 'ec';
279    }
280
281    // save the comment metadata file
282    io_saveFile($file, serialize($data));
283    $this->_addLogEntry($date, $ID, $type, '', $cid);
284
285    $this->_show();
286    return true;
287  }
288
289  /**
290   * Prints an individual comment
291   */
292  function _print($cid, &$data, $parent = '', $reply = '', $visible = true){
293    global $conf;
294    global $lang;
295    global $ID;
296    global $INFO;
297
298    if (!isset($data['comments'][$cid])) return false; // comment was removed
299    $comment = $data['comments'][$cid];
300
301    if (!is_array($comment)) return false;          // corrupt datatype
302
303    if ($comment['parent'] != $parent) return true; // reply to an other comment
304
305    if (!$comment['show']){                         // comment hidden
306      if ($INFO['perm'] == AUTH_ADMIN) echo '<div class="comment_hidden">'.NL;
307      else return true;
308    }
309
310    // comment head with date and user data
311    echo '<div class="comment_head">'.NL;
312    echo '<a name="comment__'.$cid.'" id="comment__'.$cid.'">'.NL;
313
314    // show gravatar image
315    if ($this->getConf('usegravatar')){
316      $default = DOKU_URL.'lib/plugins/discussion/images/default.gif';
317      $size    = $this->getConf('gravatar_size');
318      if ($comment['mail']) $src = ml('http://www.gravatar.com/avatar.php?'.
319        'gravatar_id='.md5($comment['mail']).
320        '&default='.urlencode($default).
321        '&size='.$size.
322        '&rating='.$this->getConf('gravatar_rating').
323        '&.jpg', 'cache=recache');
324      else $src = $default;
325      $title = ($comment['name'] ? $comment['name'] : obfuscate($comment['mail']));
326      echo '<img src="'.$src.'" class="medialeft" title="'.$title.'"'.
327        ' alt="'.$title.'" width="'.$size.'" height="'.$size.'" />'.NL;
328      $style = ' style="margin-left: '.($size + 14).'px;"';
329    } else {
330      $style = ' style="margin-left: 20px;"';
331    }
332
333    echo '</a>'.NL;
334    if ($this->getConf('linkemail') && $comment['mail']){
335      echo $this->email($comment['email'], $comment['name']);
336    } elseif ($comment['url']){
337      echo $this->external_link($comment['url'], $comment['name'], 'urlextern');
338    } else {
339      echo $comment['name'];
340    }
341    if ($comment['address']) echo ', '.htmlentities($comment['address']);
342    echo ', '.date($conf['dformat'], $comment['date']);
343    if ($comment['edited']) echo ' ('.date($conf['dformat'], $comment['edited']).')';
344    echo ':'.NL;
345    echo '</div>'.NL; // class="comment_head"
346
347    // main comment content
348    echo '<div class="comment_body"'.($this->getConf('usegravatar') ? $style : '').'>'.NL;
349    echo $comment['xhtml'].NL;
350    echo '</div>'.NL; // class="comment_body"
351
352
353    if ($visible){
354      // show hide/show toogle button?
355      echo '<div class="comment_buttons">'.NL;
356      if ($INFO['perm'] == AUTH_ADMIN){
357        if (!$comment['show']) $label = $this->getLang('btn_show');
358        else $label = $this->getLang('btn_hide');
359
360        $this->_button($cid, $label, 'toogle');
361      }
362
363      // show reply button?
364      if (($data['status'] == 1) && !$reply && $comment['show']
365        && ($this->getConf('allowguests') || $_SERVER['REMOTE_USER']))
366        $this->_button($cid, $this->getLang('btn_reply'), 'reply', true);
367
368      // show edit and delete button?
369      if ((($comment['user'] == $_SERVER['REMOTE_USER']) && ($comment['user'] != ''))
370        || ($INFO['perm'] == AUTH_ADMIN))
371        $this->_button($cid, $lang['btn_secedit'], 'edit', true);
372      if ($INFO['perm'] == AUTH_ADMIN)
373        $this->_button($cid, $lang['btn_delete'], 'delete');
374      echo '</div>'.NL; // class="comment_buttons"
375      echo '<div class="comment_line" '.($this->getConf('usegravatar') ? $style : '').'>&nbsp;</div>'.NL;
376    }
377
378    // replies to this comment entry?
379    if (count($comment['replies'])){
380      echo '<div class="comment_replies"'.$style.'>'.NL;
381      $visible = ($comment['show'] && $visible);
382      foreach ($comment['replies'] as $rid){
383        $this->_print($rid, $data, $cid, $reply, $visible);
384      }
385      echo '</div>'.NL; // class="comment_replies"
386    }
387
388    if (!$comment['show']) echo '</div>'.NL; // class="comment_hidden"
389
390    // reply form
391    if ($reply == $cid){
392      echo '<div class="comment_replies">'.NL;
393      $this->_form('', 'add', $cid);
394      echo '</div>'.NL; // class="comment_replies"
395    }
396  }
397
398  /**
399   * Outputs the comment form
400   */
401  function _form($raw = '', $act = 'add', $cid = NULL){
402    global $lang;
403    global $conf;
404    global $ID;
405    global $INFO;
406
407    // not for unregistered users when guest comments aren't allowed
408    if (!$_SERVER['REMOTE_USER'] && !$this->getConf('allowguests')) return false;
409
410    // fill $raw with $_REQUEST['text'] if it's empty (for failed CAPTCHA check)
411    if (!$raw && ($_REQUEST['comment'] == 'show')) $raw = $_REQUEST['text'];
412
413    ?>
414    <div class="comment_form">
415      <form id="discussion__comment_form" method="post" action="<?php echo script() ?>" accept-charset="<?php echo $lang['encoding'] ?>" onsubmit="return validate(this);">
416        <div class="no">
417          <input type="hidden" name="id" value="<?php echo $ID ?>" />
418          <input type="hidden" name="do" value="show" />
419          <input type="hidden" name="comment" value="<?php echo $act ?>" />
420    <?php
421
422    // for adding a comment
423    if ($act == 'add'){
424      ?>
425          <input type="hidden" name="reply" value="<?php echo $cid ?>" />
426      <?php
427      // for registered user (and we're not in admin import mode)
428      if ($conf['useacl'] && $_SERVER['REMOTE_USER']
429        && (!($this->getConf('adminimport') && ($INFO['perm'] == AUTH_ADMIN)))){
430      ?>
431          <input type="hidden" name="user" value="<?php echo hsc($_SERVER['REMOTE_USER']) ?>" />
432          <input type="hidden" name="name" value="<?php echo hsc($INFO['userinfo']['name']) ?>" />
433          <input type="hidden" name="mail" value="<?php echo hsc($INFO['userinfo']['mail']) ?>" />
434      <?php
435      // for guest: show name and e-mail entry fields
436      } else {
437      ?>
438          <input type="hidden" name="user" value="<?php echo clientIP() ?>" />
439          <div class="comment_name">
440            <label class="block" for="discussion__comment_name">
441              <span><?php echo $lang['fullname'] ?>:</span>
442              <input type="text" class="edit" name="name" id="discussion__comment_name" size="50" tabindex="1" value="<?php echo hsc($_REQUEST['name'])?>" />
443            </label>
444          </div>
445          <div class="comment_mail">
446            <label class="block" for="discussion__comment_mail">
447              <span><?php echo $lang['email'] ?>:</span>
448              <input type="text" class="edit" name="mail" id="discussion__comment_mail" size="50" tabindex="2" value="<?php echo hsc($_REQUEST['mail'])?>" />
449            </label>
450          </div>
451      <?php
452      }
453
454      // allow entering an URL
455      if ($this->getConf('urlfield')){
456      ?>
457          <div class="comment_url">
458            <label class="block" for="discussion__comment_url">
459              <span><?php echo $this->getLang('url') ?>:</span>
460              <input type="text" class="edit" name="url" id="discussion__comment_url" size="50" tabindex="3" value="<?php echo hsc($_REQUEST['url'])?>" />
461            </label>
462          </div>
463      <?php
464      }
465
466      // allow entering an address
467      if ($this->getConf('addressfield')){
468      ?>
469          <div class="comment_address">
470            <label class="block" for="discussion__comment_address">
471              <span><?php echo $this->getLang('address') ?>:</span>
472              <input type="text" class="edit" name="address" id="discussion__comment_address" size="50" tabindex="4" value="<?php echo hsc($_REQUEST['address'])?>" />
473            </label>
474          </div>
475      <?php
476      }
477
478      // allow setting the comment date
479      if ($this->getConf('adminimport') && ($INFO['perm'] == AUTH_ADMIN)){
480      ?>
481          <div class="comment_date">
482            <label class="block" for="discussion__comment_date">
483              <span><?php echo $this->getLang('date') ?>:</span>
484              <input type="text" class="edit" name="date" id="discussion__comment_date" size="50" />
485            </label>
486          </div>
487      <?php
488      }
489
490    // for saving a comment
491    } else {
492    ?>
493          <input type="hidden" name="cid" value="<?php echo $cid ?>" />
494    <?php
495    }
496    ?>
497          <div class="comment_text">
498            <textarea class="edit" name="text" cols="80" rows="10" id="discussion__comment_text" tabindex="5"><?php echo formText($raw) ?></textarea>
499          </div>
500    <?php //bad and dirty event insert hook
501    $evdata = array('writable' => true);
502    trigger_event('HTML_EDITFORM_INJECTION', $evdata);
503    ?>
504          <input class="button" type="submit" name="submit" value="<?php echo $lang['btn_save'] ?>" tabindex="6" />
505        </div>
506      </form>
507    </div>
508    <?php
509    if ($this->getConf('usecocomment')) echo $this->_coComment();
510  }
511
512  /**
513   * Adds a javascript to interact with coComments
514   */
515  function _coComment(){
516    global $ID;
517    global $conf;
518    global $INFO;
519
520    $user = $_SERVER['REMOTE_USER'];
521
522    ?>
523    <script type="text/javascript"><!--//--><![CDATA[//><!--
524      var blogTool  = "DokuWiki";
525      var blogURL   = "<?php echo DOKU_URL ?>";
526      var blogTitle = "<?php echo $conf['title'] ?>";
527      var postURL   = "<?php echo wl($ID, '', true) ?>";
528      var postTitle = "<?php echo tpl_pagetitle($ID, true) ?>";
529    <?php
530    if ($user){
531    ?>
532      var commentAuthor = "<?php echo $INFO['userinfo']['name'] ?>";
533    <?php
534    } else {
535    ?>
536      var commentAuthorFieldName = "name";
537    <?php
538    }
539    ?>
540      var commentAuthorLoggedIn = <?php echo ($user ? 'true' : 'false') ?>;
541      var commentFormID         = "discussion__comment_form";
542      var commentTextFieldName  = "text";
543      var commentButtonName     = "submit";
544      var cocomment_force       = false;
545    //--><!]]></script>
546    <script type="text/javascript" src="http://www.cocomment.com/js/cocomment.js">
547    </script>
548    <?php
549  }
550
551  /**
552   * General button function
553   */
554  function _button($cid, $label, $act, $jump = false){
555    global $ID;
556    $anchor = ($jump ? '#discussion__comment_form' : '' );
557
558    ?>
559    <form class="button" method="post" action="<?php echo script().$anchor ?>">
560      <div class="no">
561        <input type="hidden" name="id" value="<?php echo $ID ?>" />
562        <input type="hidden" name="do" value="show" />
563        <input type="hidden" name="comment" value="<?php echo $act ?>" />
564        <input type="hidden" name="cid" value="<?php echo $cid ?>" />
565        <input type="submit" value="<?php echo $label ?>" class="button" title="<?php echo $label ?>" />
566      </div>
567    </form>
568    <?php
569    return true;
570  }
571
572  /**
573   * Adds an entry to the comments changelog
574   *
575   * @author Esther Brunner <wikidesign@gmail.com>
576   * @author Ben Coburn <btcoburn@silicodon.net>
577   */
578  function _addLogEntry($date, $id, $type = 'cc', $summary = '', $extra = ''){
579    global $conf;
580
581    $changelog = $conf['metadir'].'/_comments.changes';
582
583    if(!$date) $date = time(); //use current time if none supplied
584    $remote = $_SERVER['REMOTE_ADDR'];
585    $user   = $_SERVER['REMOTE_USER'];
586
587    $strip = array("\t", "\n");
588    $logline = array(
589      'date'  => $date,
590      'ip'    => $remote,
591      'type'  => str_replace($strip, '', $type),
592      'id'    => $id,
593      'user'  => $user,
594      'sum'   => str_replace($strip, '', $summary),
595      'extra' => str_replace($strip, '', $extra)
596    );
597
598    // add changelog line
599    $logline = implode("\t", $logline)."\n";
600    io_saveFile($changelog, $logline, true); //global changelog cache
601    $this->_trimRecentCommentsLog($changelog);
602  }
603
604  /**
605   * Trims the recent comments cache to the last $conf['changes_days'] recent
606   * changes or $conf['recent'] items, which ever is larger.
607   * The trimming is only done once a day.
608   *
609   * @author Ben Coburn <btcoburn@silicodon.net>
610   */
611  function _trimRecentCommentsLog($changelog){
612    global $conf;
613
614    if (@file_exists($changelog) &&
615      (filectime($changelog) + 86400) < time() &&
616      !@file_exists($changelog.'_tmp')){
617
618      io_lock($changelog);
619      $lines = file($changelog);
620      if (count($lines)<$conf['recent']) {
621          // nothing to trim
622          io_unlock($changelog);
623          return true;
624      }
625
626      io_saveFile($changelog.'_tmp', '');                  // presave tmp as 2nd lock
627      $trim_time = time() - $conf['recent_days']*86400;
628      $out_lines = array();
629
630      for ($i=0; $i<count($lines); $i++) {
631        $log = parseChangelogLine($lines[$i]);
632        if ($log === false) continue;                      // discard junk
633        if ($log['date'] < $trim_time) {
634          $old_lines[$log['date'].".$i"] = $lines[$i];     // keep old lines for now (append .$i to prevent key collisions)
635        } else {
636          $out_lines[$log['date'].".$i"] = $lines[$i];     // definitely keep these lines
637        }
638      }
639
640      // sort the final result, it shouldn't be necessary,
641      // however the extra robustness in making the changelog cache self-correcting is worth it
642      ksort($out_lines);
643      $extra = $conf['recent'] - count($out_lines);        // do we need extra lines do bring us up to minimum
644      if ($extra > 0) {
645        ksort($old_lines);
646        $out_lines = array_merge(array_slice($old_lines,-$extra),$out_lines);
647      }
648
649      // save trimmed changelog
650      io_saveFile($changelog.'_tmp', implode('', $out_lines));
651      @unlink($changelog);
652      if (!rename($changelog.'_tmp', $changelog)) {
653        // rename failed so try another way...
654        io_unlock($changelog);
655        io_saveFile($changelog, implode('', $out_lines));
656        @unlink($changelog.'_tmp');
657      } else {
658        io_unlock($changelog);
659      }
660      return true;
661    }
662  }
663
664  /**
665   * Sends a notify mail on new comment
666   *
667   * @param  array  $comment  data array of the new comment
668   *
669   * @author Andreas Gohr <andi@splitbrain.org>
670   * @author Esther Brunner <wikidesign@gmail.com>
671   */
672  function _notify($comment){
673    global $conf;
674    global $ID;
675
676    if ((!$conf['subscribers']) && (!$conf['notify'])) return; //subscribers enabled?
677    $bcc  = subscriber_addresslist($ID);
678    if ((empty($bcc)) && (!$conf['notify'])) return;
679    $to   = $conf['notify'];
680    $text = io_readFile($this->localFN('subscribermail'));
681
682    $text = str_replace('@PAGE@', $ID, $text);
683    $text = str_replace('@TITLE@', $conf['title'], $text);
684    $text = str_replace('@DATE@', date($conf['dformat'], $comment['date']), $text);
685    $text = str_replace('@NAME@', $comment['name'], $text);
686    $text = str_replace('@TEXT@', $comment['raw'], $text);
687    $text = str_replace('@UNSUBSCRIBE@', wl($ID, 'do=unsubscribe', true, '&'), $text);
688    $text = str_replace('@DOKUWIKIURL@', DOKU_URL, $text);
689
690    $subject = '['.$conf['title'].'] '.$this->getLang('mail_newcomment');
691
692    mail_send($to, $subject, $text, $conf['mailfrom'], '', $bcc);
693  }
694
695  /**
696   * Counts the number of visible comments
697   */
698  function _count($data){
699    $number = 0;
700    foreach ($data['comments'] as $cid => $comment){
701      if ($comment['parent']) continue;
702      if (!$comment['show']) continue;
703      $number++;
704      $rids = $comment['replies'];
705      if (count($rids)) $number = $number + $this->_countReplies($data, $rids);
706    }
707    return $number;
708  }
709
710  function _countReplies(&$data, $rids){
711    $number = 0;
712    foreach ($rids as $rid){
713      if (!isset($data['comments'][$rid])) continue; // reply was removed
714      if (!$data['comments'][$rid]['show']) continue;
715      $number++;
716      $rids = $data['comments'][$rid]['replies'];
717      if (count($rids)) $number = $number + $this->_countReplies($data, $rids);
718    }
719    return $number;
720  }
721
722  /**
723   * Renders the comment text
724   */
725  function _render($raw){
726    if ($this->getConf('wikisyntaxok')){
727      $xhtml = $this->render($raw);
728    } else { // wiki syntax not allowed -> just encode special chars
729      $xhtml = htmlspecialchars(trim($raw));
730    }
731    return $xhtml;
732  }
733
734  /**
735   * Adds a TOC item for the discussion section
736   */
737  function add_toc_item(&$event, $param){
738    if ($event->data[0] != 'xhtml') return; // nothing to do for us
739    if (!$this->_hasDiscussion()) return;   // no discussion section
740
741    $pattern = '/<div id="toc__inside">(.*?)<\/div>\s<\/div>/s';
742    if (!preg_match($pattern, $event->data[1], $match)) return; // no TOC on this page
743
744    // ok, then let's do it!
745    global $conf;
746
747    $title   = $this->getLang('discussion');
748    $section = '#discussion__section';
749    $level   = 3 - $conf['toptoclevel'];
750
751    $item = '<li class="level'.$level.'"><div class="li"><span class="li"><a href="'.
752      $section.'" class="toc">'.$title.'</a></span></div></li>';
753
754    if ($level == 1) $search = "</ul>\n</div>";
755    else $search = "</ul>\n</li></ul>\n</div>";
756
757    $new = str_replace($search, $item.$search, $match[0]);
758    $event->data[1] = preg_replace($pattern, $new, $event->data[1]);
759  }
760
761  /**
762   * Finds out whether there is a discussion section for the current page
763   */
764  function _hasDiscussion(){
765    global $ID;
766
767    $cfile = metaFN($ID, '.comments');
768
769    if (!@file_exists($cfile)){
770      if ($this->getConf('automatic')) return true;
771      else return false;
772    }
773
774    $comments = unserialize(io_readFile($cfile, false));
775
776    $num = $comments['number'];
777    if ((!$comments['status']) || (($comments['status'] == 2) && (!$num))) return false;
778    else return true;
779  }
780
781  /**
782   * Checks if 'newthread' was given as action or the comment form was submitted
783   */
784  function handle_act_preprocess(&$event, $param){
785    if ($event->data == 'newthread'){
786      // we can handle it -> prevent others
787      // $event->stopPropagation();
788      $event->preventDefault();
789
790      $event->data = $this->_handle_newThread();
791    }
792    if ((in_array($_REQUEST['comment'], array('add', 'save')))
793      && (@file_exists(DOKU_PLUGIN.'captcha/action.php'))){
794      $this->_handle_captchaCheck();
795    }
796  }
797
798  /**
799   * Creates a new thread page
800   */
801  function _handle_newThread(){
802    global $ID;
803    global $INFO;
804
805    $ns    = cleanID($_REQUEST['ns']);
806    $title = str_replace(':', '', $_REQUEST['title']);
807    $back  = $ID;
808    $ID    = ($ns ? $ns.':' : '').cleanID($title);
809    $INFO  = pageinfo();
810
811    // check if we are allowed to create this file
812    if ($INFO['perm'] >= AUTH_CREATE){
813
814      //check if locked by anyone - if not lock for my self
815      if ($INFO['locked']) return 'locked';
816      else lock($ID);
817
818      // prepare the new thread file with default stuff
819      if (!@file_exists($INFO['filepath'])){
820        global $TEXT;
821        global $conf;
822
823        $TEXT = pageTemplate(array(($ns ? $ns.':' : '').$title));
824        if (!$TEXT){
825          $TEXT = "<- [[:$back]]\n\n====== $title ======\n\n";
826          if ($this->getConf('usegravatar'))
827            $TEXT .= '{{gravatar>'.$INFO['userinfo']['mail'].' }} ';
828          $TEXT .= "//".$INFO['userinfo']['name'].", ".date($conf['dformat']).": //\n\n";
829          if ((@file_exists(DOKU_PLUGIN.'tag/syntax/tag.php'))
830            && (!plugin_isdisabled('tag')))
831            $TEXT .= "\n\n{{tag>}}";
832          $TEXT .= "\n\n~~DISCUSSION~~";
833        }
834        return 'preview';
835      } else {
836        return 'edit';
837      }
838    } else {
839      return 'show';
840    }
841  }
842
843  /**
844   * Checks if the CAPTCHA string submitted is valid
845   *
846   * @author     Andreas Gohr <gohr@cosmocode.de>
847   * @adaption   Esther Brunner <wikidesign@gmail.com>
848   */
849  function _handle_captchaCheck(){
850    if (@file_exists(DOKU_PLUGIN.'captcha/disabled')) return; // CAPTCHA is disabled
851
852    require_once(DOKU_PLUGIN.'captcha/action.php');
853    $captcha = new action_plugin_captcha;
854
855    // do nothing if logged in user and no CAPTCHA required
856    if (!$captcha->getConf('forusers') && $_SERVER['REMOTE_USER']) return;
857
858    // compare provided string with decrypted captcha
859    $rand = PMA_blowfish_decrypt($_REQUEST['plugin__captcha_secret'], auth_cookiesalt());
860    $code = $captcha->_generateCAPTCHA($captcha->_fixedIdent(), $rand);
861
862    if (!$_REQUEST['plugin__captcha_secret'] ||
863      !$_REQUEST['plugin__captcha'] ||
864      strtoupper($_REQUEST['plugin__captcha']) != $code){
865
866      // CAPTCHA test failed! Continue to edit instead of saving
867      msg($captcha->getLang('testfailed'), -1);
868      if ($_REQUEST['comment'] == 'save') $_REQUEST['comment'] = 'edit';
869      elseif ($_REQUEST['comment'] == 'add') $_REQUEST['comment'] = 'show';
870    }
871    // if we arrive here it was a valid save
872  }
873
874}
875
876//Setup VIM: ex: et ts=4 enc=utf-8 :
877