xref: /plugin/discussion/helper.php (revision 04b83c99b724371ee0f08e7ad0959006b22ac4fb) 
1<?php
2/**
3 * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
4 * @author     Esther Brunner <wikidesign@gmail.com>
5 */
6
7/**
8 * Class helper_plugin_discussion
9 */
10class helper_plugin_discussion extends DokuWiki_Plugin
11{
12
13    /**
14     * @return array
15     */
16    public function getMethods()
17    {
18        $result = [];
19        $result[] = [
20            'name' => 'th',
21            'desc' => 'returns the header of the comments column for pagelist',
22            'return' => ['header' => 'string'],
23        ];
24        $result[] = [
25            'name' => 'td',
26            'desc' => 'returns the link to the discussion section with number of comments',
27            'params' => [
28                'id' => 'string',
29                'number of comments (optional)' => 'integer'],
30            'return' => ['link' => 'string'],
31        ];
32        $result[] = [
33            'name' => 'getThreads',
34            'desc' => 'returns pages with discussion sections, sorted by recent comments',
35            'params' => [
36                'namespace' => 'string',
37                'number (optional)' => 'integer'],
38            'return' => ['pages' => 'array'],
39        ];
40        $result[] = [
41            'name' => 'getComments',
42            'desc' => 'returns recently added or edited comments individually',
43            'params' => [
44                'namespace' => 'string',
45                'number (optional)' => 'integer'],
46            'return' => ['pages' => 'array'],
47        ];
48        $result[] = [
49            'name' => 'isDiscussionModerator',
50            'desc' => 'check if current user is member of moderator groups',
51            'params' => [],
52            'return' => ['isModerator' => 'boolean']
53        ];
54        return $result;
55    }
56
57    /**
58     * Returns the column header for the Pagelist Plugin
59     *
60     * @return string
61     */
62    public function th()
63    {
64        return $this->getLang('discussion');
65    }
66
67    /**
68     * Returns the link to the discussion section of a page
69     *
70     * @param string $id page id
71     * @param string $col column name, used if more columns needed per plugin
72     * @param string $class class name per cell set by reference
73     * @param null|int $num number of visible comments -- internally used, not by pagelist plugin
74     * @return string
75     */
76    public function td($id, $col = null, &$class = null, $num = null)
77    {
78        $section = '#discussion__section';
79
80        if (!isset($num)) {
81            $cfile = metaFN($id, '.comments');
82            $comments = unserialize(io_readFile($cfile, false));
83
84            $num = $comments['number'];
85            if (!$comments['status'] || ($comments['status'] == 2 && !$num)) {
86                return '';
87            }
88        }
89
90        if ($num == 0) {
91            $comment = '0&nbsp;' . $this->getLang('nocomments');
92        } elseif ($num == 1) {
93            $comment = '1&nbsp;' . $this->getLang('comment');
94        } else {
95            $comment = $num . '&nbsp;' . $this->getLang('comments');
96        }
97
98        return '<a href="' . wl($id) . $section . '" class="wikilink1" title="' . $id . $section . '">'
99            . $comment
100            . '</a>';
101    }
102
103    /**
104     * Returns an array of pages with discussion sections, sorted by recent comments
105     * Note: also used for content by Feed Plugin
106     *
107     * @param string $ns
108     * @param null|int $num
109     * @param string|bool $skipEmpty
110     * @return array
111     */
112    public function getThreads($ns, $num = null, $skipEmpty = false)
113    {
114        global $conf;
115
116        // returns the list of pages in the given namespace and it's subspaces
117        $dir =  utf8_encodeFN(str_replace(':', '/', $ns));
118        $opts = [
119            'depth' => 0, // 0=all
120            'skipacl' => true // is checked later
121        ];
122        $items = [];
123        search($items, $conf['datadir'], 'search_allpages', $opts, $dir);
124
125        // add pages with comments to result
126        $result = [];
127        foreach ($items as $item) {
128            $id = $item['id'];
129
130            // some checks
131            $perm = auth_quickaclcheck($id);
132            if ($perm < AUTH_READ) continue;    // skip if no permission
133            $file = metaFN($id, '.comments');
134            if (!@file_exists($file)) continue; // skip if no comments file
135            $data = unserialize(io_readFile($file, false));
136            $status = $data['status'];
137            $number = $data['number'];
138
139            if (!$status || ($status == 2 && !$number)) continue; // skip if comments are off or closed without comments
140            if ($skipEmpty && $number == 0) continue; // skip if discussion is empty and flag is set
141
142            //new comments are added to the end of array
143            $date = false;
144            if(isset($data['comments'])) {
145                $latestcomment = end($data['comments']);
146                $date = $latestcomment['date']['created'] ?? false;
147            }
148            //e.g. if no comments
149            if(!$date) {
150                $date = filemtime($file);
151            }
152
153            $meta = p_get_metadata($id);
154            $result[$date . '_' . $id] = [
155                'id' => $id,
156                'file' => $file,
157                'title' => $meta['title'] ?? '',
158                'date' => $date,
159                'user' => $meta['creator'],
160                'desc' => $meta['description']['abstract'],
161                'num' => $number,
162                'comments' => $this->td($id, null, $class, $number),
163                'status' => $status,
164                'perm' => $perm,
165                'exists' => true,
166                'anchor' => 'discussion__section',
167            ];
168        }
169
170        // finally sort by time of last comment
171        krsort($result);
172
173        if (is_numeric($num)) {
174            $result = array_slice($result, 0, $num);
175        }
176
177        return $result;
178    }
179
180    /**
181     * Returns an array of recently added comments to a given page or namespace
182     * Note: also used for content by Feed Plugin
183     *
184     * @param string $ns
185     * @param int|null $num number of comment per page
186     * @return array
187     */
188    public function getComments($ns, $num = null)
189    {
190        global $conf, $INPUT;
191
192        $first = $INPUT->int('first');
193
194        if (!$num || !is_numeric($num)) {
195            $num = $conf['recent'];
196        }
197
198        $result = [];
199        $count = 0;
200
201        if (!@file_exists($conf['metadir'] . '/_comments.changes')) {
202            return $result;
203        }
204
205        // read all recent changes. (kept short)
206        $lines = file($conf['metadir'] . '/_comments.changes');
207
208        $seen = []; //caches seen pages in order to skip them
209        // handle lines
210        $line_num = count($lines);
211        for ($i = ($line_num - 1); $i >= 0; $i--) {
212            $rec = $this->handleRecentComment($lines[$i], $ns, $seen);
213            if ($rec !== false) {
214                if (--$first >= 0) continue; // skip first entries
215
216                $result[$rec['date']] = $rec;
217                $count++;
218                // break when we have enough entries
219                if ($count >= $num) break;
220            }
221        }
222
223        // finally sort by time of last comment
224        krsort($result);
225
226        return $result;
227    }
228
229    /* ---------- Changelog function adapted for the Discussion Plugin ---------- */
230
231    /**
232     * Internal function used by $this->getComments()
233     *
234     * don't call directly
235     *
236     * @param string $line comment changelog line
237     * @param string $ns namespace (or id) to filter
238     * @param array $seen array to cache seen pages
239     * @return array|false with
240     *  'type' => string,
241     *  'extra' => string comment id,
242     *  'id' => string page id,
243     *  'perm' => int ACL permission
244     *  'file' => string file path of wiki page
245     *  'exists' => bool wiki page exists
246     *  'name' => string name of user
247     *  'desc' => string text of comment
248     *  'anchor' => string
249     *
250     * @see getRecentComments()
251     * @author Andreas Gohr <andi@splitbrain.org>
252     * @author Ben Coburn <btcoburn@silicodon.net>
253     * @author Esther Brunner <wikidesign@gmail.com>
254     *
255     */
256    protected function handleRecentComment($line, $ns, &$seen)
257    {
258        if (empty($line)) return false;  //skip empty lines
259
260        // split the line into parts
261        $recent = parseChangelogLine($line);
262        if ($recent === false) return false;
263
264        $cid = $recent['extra'];
265        $fullcid = $recent['id'] . '#' . $recent['extra'];
266
267        // skip seen ones
268        if (isset($seen[$fullcid])) return false;
269
270        // skip 'show comment' log entries
271        if ($recent['type'] === 'sc') return false;
272
273        // remember in seen to skip additional sights
274        $seen[$fullcid] = 1;
275
276        // check if it's a hidden page or comment
277        if (isHiddenPage($recent['id'])) return false;
278        if ($recent['type'] === 'hc') return false;
279
280        // filter namespace or id
281        if ($ns && strpos($recent['id'] . ':', $ns . ':') !== 0) return false;
282
283        // check ACL
284        $recent['perm'] = auth_quickaclcheck($recent['id']);
285        if ($recent['perm'] < AUTH_READ) return false;
286
287        // check existance
288        $recent['file'] = wikiFN($recent['id']);
289        $recent['exists'] = @file_exists($recent['file']);
290        if (!$recent['exists']) return false;
291        if ($recent['type'] === 'dc') return false;
292
293        // get discussion meta file name
294        $data = unserialize(io_readFile(metaFN($recent['id'], '.comments'), false));
295
296        // check if discussion is turned off
297        if ($data['status'] === 0) return false;
298
299        $parent_id = $cid;
300        // Check for the comment and all parents if they exist and are visible.
301        do {
302            $tcid = $parent_id;
303
304            // check if the comment still exists
305            if (!isset($data['comments'][$tcid])) return false;
306            // check if the comment is visible
307            if ($data['comments'][$tcid]['show'] != 1) return false;
308
309            $parent_id = $data['comments'][$tcid]['parent'];
310        } while ($parent_id && $parent_id != $tcid);
311
312        // okay, then add some additional info
313        if (is_array($data['comments'][$cid]['user'])) {
314            $recent['name'] = $data['comments'][$cid]['user']['name'];
315        } else {
316            $recent['name'] = $data['comments'][$cid]['name'];
317        }
318        $recent['desc'] = strip_tags($data['comments'][$cid]['xhtml']);
319        $recent['anchor'] = 'comment_' . $cid;
320
321        return $recent;
322    }
323
324    /**
325     * Check if current user is member of the moderator groups
326     *
327     * @return bool is moderator?
328     */
329    public function isDiscussionModerator()
330    {
331        global $USERINFO, $INPUT;
332        $groups = trim($this->getConf('moderatorgroups'));
333
334        if (auth_ismanager()) {
335            return true;
336        }
337        // Check if user is member of the moderator groups
338        if (!empty($groups) && auth_isMember($groups, $INPUT->server->str('REMOTE_USER'), (array)$USERINFO['grps'])) {
339            return true;
340        }
341
342        return false;
343    }
344}
345