xref: /plugin/tagging/helper.php (revision 26f618339d82b2cc64052524e09e342155769f5a) 
1<?php
2/**
3 * Tagging Plugin (hlper component)
4 *
5 * @license GPL 2
6 */
7class helper_plugin_tagging extends DokuWiki_Plugin {
8
9    /**
10     * Gives access to the database
11     *
12     * Initializes the SQLite helper and register the CLEANTAG function
13     *
14     * @return helper_plugin_sqlite|bool false if initialization fails
15     */
16    public function getDB() {
17        static $db = null;
18        if ($db !== null) {
19            return $db;
20        }
21
22        /** @var helper_plugin_sqlite $db */
23        $db = plugin_load('helper', 'sqlite');
24        if ($db === null) {
25            msg('The tagging plugin needs the sqlite plugin', -1);
26
27            return false;
28        }
29        $db->init('tagging', __DIR__ . '/db/');
30        $db->create_function('CLEANTAG', array($this, 'cleanTag'), 1);
31        $db->create_function('GROUP_SORT',
32            function ($group, $newDelimiter) {
33                $ex = array_filter(explode(',', $group));
34                sort($ex);
35
36                return implode($newDelimiter, $ex);
37            }, 2);
38        $db->create_function('GET_NS', 'getNS', 1);
39
40        return $db;
41    }
42
43    /**
44     * Return the user to use for accessing tags
45     *
46     * Handles the singleuser mode by returning 'auto' as user. Returnes false when no user is logged in.
47     *
48     * @return bool|string
49     */
50    public function getUser() {
51        if (!isset($_SERVER['REMOTE_USER'])) {
52            return false;
53        }
54        if ($this->getConf('singleusermode')) {
55            return 'auto';
56        }
57
58        return $_SERVER['REMOTE_USER'];
59    }
60
61    /**
62     * Canonicalizes the tag to its lower case nospace form
63     *
64     * @param $tag
65     *
66     * @return string
67     */
68    public function cleanTag($tag) {
69        $tag = str_replace(array(' ', '-', '_'), '', $tag);
70        $tag = utf8_strtolower($tag);
71
72        return $tag;
73    }
74
75    /**
76     * Canonicalizes the namespace, remove the first colon and add glob
77     *
78     * @param $namespace
79     *
80     * @return string
81     */
82    public function globNamespace($namespace) {
83        return cleanId($namespace) . '*';
84    }
85
86    /**
87     * Create or Update tags of a page
88     *
89     * Uses the translation plugin to store the language of a page (if available)
90     *
91     * @param string $id The page ID
92     * @param string $user
93     * @param array  $tags
94     *
95     * @return bool|SQLiteResult
96     */
97    public function replaceTags($id, $user, $tags) {
98        global $conf;
99        /** @var helper_plugin_translation $trans */
100        $trans = plugin_load('helper', 'translation');
101        if ($trans) {
102            $lang = $trans->realLC($trans->getLangPart($id));
103        } else {
104            $lang = $conf['lang'];
105        }
106
107        $db = $this->getDB();
108        $db->query('BEGIN TRANSACTION');
109        $queries = array(array('DELETE FROM taggings WHERE pid = ? AND tagger = ?', $id, $user));
110        foreach ($tags as $tag) {
111            $queries[] = array('INSERT INTO taggings (pid, tagger, tag, lang) VALUES(?, ?, ?, ?)', $id, $user, $tag, $lang);
112        }
113
114        foreach ($queries as $query) {
115            if (!call_user_func_array(array($db, 'query'), $query)) {
116                $db->query('ROLLBACK TRANSACTION');
117
118                return false;
119            }
120        }
121
122        return $db->query('COMMIT TRANSACTION');
123    }
124
125    /**
126     * Get a list of Tags or Pages matching search criteria
127     *
128     * @param array  $filter What to search for array('field' => 'searchterm')
129     * @param string $type   What field to return 'tag'|'pid'
130     * @param int    $limit  Limit to this many results, 0 for all
131     *
132     * @return array associative array in form of value => count
133     */
134    public function findItems($filter, $type, $limit = 0) {
135
136        global $INPUT;
137
138        /** @var helper_plugin_tagging_querybuilder $queryBuilder */
139        $queryBuilder = new \helper_plugin_tagging_querybuilder();
140
141        $queryBuilder->setField($type);
142        $queryBuilder->setLimit($limit);
143        $queryBuilder->setTags($this->getTags($filter));
144        if (isset($filter['ns'])) $queryBuilder->includeNS($filter['ns']);
145        if (isset($filter['notns'])) $queryBuilder->excludeNS($filter['notns']);
146        if (isset($filter['tagger'])) $queryBuilder->setTagger($filter['tagger']);
147        if (isset($filter['pid'])) $queryBuilder->setPid($filter['pid']);
148
149        return $this->queryDb($queryBuilder->getQuery());
150
151    }
152
153    /**
154     * Constructs the URL to search for a tag
155     *
156     * @param string $tag
157     * @param string $ns
158     *
159     * @return string
160     */
161    public function getTagSearchURL($tag, $ns = '') {
162        // wrap tag in quotes if non clean
163        $ctag = utf8_stripspecials($this->cleanTag($tag));
164        if ($ctag != utf8_strtolower($tag)) {
165            $tag = '"' . $tag . '"';
166        }
167
168        $ret = '?do=search&sf=1&id=' . rawurlencode($tag);
169        if ($ns) {
170            $ret .= rawurlencode(' @' . $ns);
171        }
172
173        return $ret;
174    }
175
176    /**
177     * Calculates the size levels for the given list of clouds
178     *
179     * Automatically determines sensible tresholds
180     *
181     * @param array $tags list of tags => count
182     * @param int   $levels
183     *
184     * @return mixed
185     */
186    public function cloudData($tags, $levels = 10) {
187        $min = min($tags);
188        $max = max($tags);
189
190        // calculate tresholds
191        $tresholds = array();
192        for ($i = 0; $i <= $levels; $i++) {
193            $tresholds[$i] = pow($max - $min + 1, $i / $levels) + $min - 1;
194        }
195
196        // assign weights
197        foreach ($tags as $tag => $cnt) {
198            foreach ($tresholds as $tresh => $val) {
199                if ($cnt <= $val) {
200                    $tags[$tag] = $tresh;
201                    break;
202                }
203                $tags[$tag] = $levels;
204            }
205        }
206
207        return $tags;
208    }
209
210    /**
211     * Display a tag cloud
212     *
213     * @param array    $tags   list of tags => count
214     * @param string   $type   'tag'
215     * @param Callable $func   The function to print the link (gets tag and ns)
216     * @param bool     $wrap   wrap cloud in UL tags?
217     * @param bool     $return returnn HTML instead of printing?
218     * @param string   $ns     Add this namespace to search links
219     *
220     * @return string
221     */
222    public function html_cloud($tags, $type, $func, $wrap = true, $return = false, $ns = '') {
223        global $INFO;
224
225        $hidden_str = $this->getConf('hiddenprefix');
226        $hidden_len = strlen($hidden_str);
227
228        $ret = '';
229        if ($wrap) {
230            $ret .= '<ul class="tagging_cloud clearfix">';
231        }
232        if (count($tags) === 0) {
233            // Produce valid XHTML (ul needs a child)
234            $this->setupLocale();
235            $ret .= '<li><div class="li">' . $this->lang['js']['no' . $type . 's'] . '</div></li>';
236        } else {
237            $tags = $this->cloudData($tags);
238            foreach ($tags as $val => $size) {
239                // skip hidden tags for users that can't edit
240                if ($type === 'tag' and
241                    $hidden_len and
242                    substr($val, 0, $hidden_len) == $hidden_str and
243                    !($this->getUser() && $INFO['writable'])
244                ) {
245                    continue;
246                }
247
248                $ret .= '<li class="t' . $size . '"><div class="li">';
249                $ret .= call_user_func($func, $val, $ns);
250                $ret .= '</div></li>';
251            }
252        }
253        if ($wrap) {
254            $ret .= '</ul>';
255        }
256        if ($return) {
257            return $ret;
258        }
259        echo $ret;
260
261        return '';
262    }
263
264    /**
265     * Get the link to a search for the given tag
266     *
267     * @param string $tag search for this tag
268     * @param string $ns  limit search to this namespace
269     *
270     * @return string
271     */
272    protected function linkToSearch($tag, $ns = '') {
273        return '<a href="' . hsc($this->getTagSearchURL($tag, $ns)) . '">' . $tag . '</a>';
274    }
275
276    /**
277     * Display the Tags for the current page and prepare the tag editing form
278     *
279     * @param bool $print Should the HTML be printed or returned?
280     *
281     * @return string
282     */
283    public function tpl_tags($print = true) {
284        global $INFO;
285        global $lang;
286
287        $filter = array('pid' => $INFO['id']);
288        if ($this->getConf('singleusermode')) {
289            $filter['tagger'] = 'auto';
290        }
291
292        $tags = $this->findItems($filter, 'tag');
293
294        $ret = '';
295
296        $ret .= '<div class="plugin_tagging_edit">';
297        $ret .= $this->html_cloud($tags, 'tag', array($this, 'linkToSearch'), true, true);
298
299        if ($this->getUser() && $INFO['writable']) {
300            $lang['btn_tagging_edit'] = $lang['btn_secedit'];
301            $ret .= '<div id="tagging__edit_buttons_group">';
302            $ret .= html_btn('tagging_edit', $INFO['id'], '', array());
303            if (auth_isadmin()) {
304                $ret .= '<label>'
305                    . $this->getLang('toggle admin mode')
306                    . '<input type="checkbox" id="tagging__edit_toggle_admin" /></label>';
307            }
308            $ret .= '</div>';
309            $form = new dokuwiki\Form\Form();
310            $form->id('tagging__edit');
311            $form->setHiddenField('tagging[id]', $INFO['id']);
312            $form->setHiddenField('call', 'plugin_tagging_save');
313            $tags = $this->findItems(array(
314                'pid'    => $INFO['id'],
315                'tagger' => $this->getUser(),
316            ), 'tag');
317            $form->addTextarea('tagging[tags]')
318                ->val(implode(', ', array_keys($tags)))
319                ->addClass('edit')
320                ->attr('rows', 4);
321            $form->addButton('', $lang['btn_save'])->id('tagging__edit_save');
322            $form->addButton('', $lang['btn_cancel'])->id('tagging__edit_cancel');
323            $ret .= $form->toHTML();
324        }
325        $ret .= '</div>';
326
327        if ($print) {
328            echo $ret;
329        }
330
331        return $ret;
332    }
333
334    /**
335     * @param string $namespace empty for entire wiki
336     *
337     * @param string $order_by
338     * @param bool $desc
339     * @param array $filters
340     * @return array
341     */
342    public function getAllTags($namespace = '', $order_by = 'tag', $desc = false, $filters = []) {
343        $order_fields = array('pid', 'tid', 'orig', 'taggers', 'ns', 'count');
344        if (!in_array($order_by, $order_fields)) {
345            msg('cannot sort by ' . $order_by . ' field does not exists', -1);
346            $order_by = 'tag';
347        }
348
349        list($having, $params) = $this->getFilterSql($filters);
350
351        $db = $this->getDb();
352
353        $query = 'SELECT    "pid",
354                            CLEANTAG("tag") AS "tid",
355                            GROUP_SORT(GROUP_CONCAT("tag"), \', \') AS "orig",
356                            GROUP_SORT(GROUP_CONCAT("tagger"), \', \') AS "taggers",
357                            GROUP_SORT(GROUP_CONCAT(GET_NS("pid")), \', \') AS "ns",
358                            GROUP_SORT(GROUP_CONCAT("pid"), \', \') AS "pids",
359                            COUNT(*) AS "count"
360                        FROM "taggings"
361                        WHERE "pid" GLOB ? AND GETACCESSLEVEL(pid) >= ' . AUTH_READ
362                        . ' GROUP BY "tid"';
363        $query .= $having;
364        $query .=      'ORDER BY ' . $order_by;
365        if ($desc) {
366            $query .= ' DESC';
367        }
368
369        array_unshift($params, $this->globNamespace($namespace));
370        $res = $db->query($query, $params);
371
372        return $db->res2arr($res);
373    }
374
375    /**
376     * Get all pages with tags and their tags
377     *
378     * @return array ['pid' => ['tag1','tag2','tag3']]
379     */
380    public function getAllTagsByPage() {
381        $query = '
382        SELECT pid, GROUP_CONCAT(tag) AS tags
383        FROM taggings
384        GROUP BY pid
385        ';
386        $db = $this->getDb();
387        $res = $db->query($query);
388        return array_map(
389            function ($i) {
390                return explode(',', $i);
391            },
392            array_column($db->res2arr($res), 'tags', 'pid')
393        );
394    }
395
396    /**
397     * Renames a tag
398     *
399     * @param string $formerTagName
400     * @param string $newTagNames
401     */
402    public function renameTag($formerTagName, $newTagNames) {
403
404        if (empty($formerTagName) || empty($newTagNames)) {
405            msg($this->getLang("admin enter tag names"), -1);
406            return;
407        }
408
409        $keepFormerTag = false;
410
411        // enable splitting tags on rename
412        $newTagNames = array_map(function ($tag) {
413            return $this->cleanTag($tag);
414        }, explode(',', $newTagNames));
415
416        $db = $this->getDB();
417
418        // non-admins can rename only their own tags
419        if (!auth_isadmin()) {
420            $queryTagger =' AND tagger = ?';
421            $tagger = $this->getUser();
422        } else {
423            $queryTagger = '';
424            $tagger = '';
425        }
426
427        $insertQuery = 'INSERT INTO taggings ';
428        $insertQuery .= 'SELECT pid, ?, tagger, lang FROM taggings';
429        $where = ' WHERE CLEANTAG(tag) = ?';
430        $where .= ' AND GETACCESSLEVEL(pid) >= ' . AUTH_EDIT;
431        $where .= $queryTagger;
432
433        $db->query('BEGIN TRANSACTION');
434
435        // insert new tags first
436        foreach ($newTagNames as $newTag) {
437            if ($newTag === $this->cleanTag($formerTagName)) {
438                $keepFormerTag = true;
439                continue;
440            }
441            $params = [$newTag, $this->cleanTag($formerTagName)];
442            if ($tagger) array_push($params, $tagger);
443            $res = $db->query($insertQuery . $where, $params);
444            if ($res === false) {
445                $db->query('ROLLBACK TRANSACTION');
446                return;
447            }
448            $db->res_close($res);
449        }
450
451        // finally delete the renamed tags
452        if (!$keepFormerTag) {
453            $deleteQuery = 'DELETE FROM taggings';
454            $params = [$this->cleanTag($formerTagName)];
455            if ($tagger) array_push($params, $tagger);
456            if ($db->query($deleteQuery . $where, $params) === false) {
457                $db->query('ROLLBACK TRANSACTION');
458                return;
459            }
460        }
461
462        $db->query('COMMIT TRANSACTION');
463
464        msg($this->getLang("admin renamed"), 1);
465
466        return;
467    }
468
469    /**
470     * Rename or delete a tag for all users
471     *
472     * @param string $pid
473     * @param string $formerTagName
474     * @param string $newTagName
475     *
476     * @return array
477     */
478    public function modifyPageTag($pid, $formerTagName, $newTagName) {
479
480        $db = $this->getDb();
481
482        $res = $db->query(
483            'SELECT pid FROM taggings WHERE CLEANTAG(tag) = ? AND pid = ?',
484            $this->cleanTag($formerTagName),
485            $pid
486        );
487        $check = $db->res2arr($res);
488
489        if (empty($check)) {
490            return array(true, $this->getLang('admin tag does not exists'));
491        }
492
493        if (empty($newTagName)) {
494            $res = $db->query(
495                'DELETE FROM taggings WHERE pid = ? AND CLEANTAG(tag) = ?',
496                $pid,
497                $this->cleanTag($formerTagName)
498            );
499        } else {
500            $res = $db->query(
501                'UPDATE taggings SET tag = ? WHERE pid = ? AND CLEANTAG(tag) = ?',
502                $newTagName,
503                $pid,
504                $this->cleanTag($formerTagName)
505            );
506        }
507        $db->res2arr($res);
508
509        return array(false, $this->getLang('admin renamed'));
510    }
511
512    /**
513     * Deletes a tag
514     *
515     * @param array  $tags
516     * @param string $namespace current namespace context as in getAllTags()
517     */
518    public function deleteTags($tags, $namespace = '') {
519        if (empty($tags)) {
520            return;
521        }
522
523        $namespace = cleanId($namespace);
524
525        $db = $this->getDB();
526
527        $queryBody = 'FROM taggings WHERE pid GLOB ? AND (' .
528            implode(' OR ', array_fill(0, count($tags), 'CLEANTAG(tag) = ?')) . ')';
529        $args = array_map(array($this, 'cleanTag'), $tags);
530        array_unshift($args, $this->globNamespace($namespace));
531
532        // non-admins can delete only their own tags
533        if (!auth_isadmin()) {
534            $queryBody .= ' AND tagger = ?';
535            array_push($args, $this->getUser());
536        }
537
538        $affectedPagesQuery= 'SELECT DISTINCT pid ' . $queryBody;
539        $resAffectedPages = $db->query($affectedPagesQuery, $args);
540        $numAffectedPages = count($resAffectedPages->fetchAll());
541
542        $deleteQuery = 'DELETE ' . $queryBody;
543        $db->query($deleteQuery, $args);
544
545        msg(sprintf($this->getLang("admin deleted"), count($tags), $numAffectedPages), 1);
546    }
547
548    /**
549     * Updates tags with a new page name
550     *
551     * @param string $oldName
552     * @param string $newName
553     */
554    public function renamePage($oldName, $newName) {
555        $db = $this->getDb();
556        $db->query('UPDATE taggings SET pid = ? WHERE pid = ?', $newName, $oldName);
557    }
558
559    /**
560     * Extracts tags from search query
561     *
562     * @param array $parsedQuery
563     * @return array
564     */
565    public function getTags($parsedQuery)
566    {
567        $tags = [];
568        if (isset($parsedQuery['phrases'][0])) {
569            $tags = $parsedQuery['phrases'];
570        } elseif (isset($parsedQuery['and'][0])) {
571            $tags = $parsedQuery['and'];
572        } elseif (isset($parsedQuery['tag'])) {
573            // handle autocomplete call
574            $tags[] = $parsedQuery['tag'];
575        }
576        return $tags;
577    }
578
579    /**
580     * Search for tagged pages
581     *
582     * @return array
583     */
584    public function searchPages()
585    {
586        global $INPUT;
587        global $QUERY;
588        $parsedQuery = ft_queryParser(new Doku_Indexer(), $QUERY);
589
590        /** @var helper_plugin_tagging_querybuilder $queryBuilder */
591        $queryBuilder = new \helper_plugin_tagging_querybuilder();
592
593        $queryBuilder->setField('pid');
594        $queryBuilder->setTags($this->getTags($parsedQuery));
595        $queryBuilder->setLogicalAnd($INPUT->str('taggings') === 'and');
596        if (isset($parsedQuery['ns'])) $queryBuilder->includeNS($parsedQuery['ns']);
597        if (isset($parsedQuery['notns'])) $queryBuilder->excludeNS($parsedQuery['notns']);
598        if (isset($parsedQuery['tagger'])) $queryBuilder->setTagger($parsedQuery['tagger']);
599        if (isset($parsedQuery['pid'])) $queryBuilder->setPid($parsedQuery['pid']);
600
601        return $this->queryDb($queryBuilder->getPages());
602    }
603
604    /**
605     * Syntax to allow users to manage tags on regular pages, respects ACLs
606     * @param string $ns
607     * @return string
608     */
609    public function manageTags($ns)
610    {
611        global $INPUT;
612
613        //by default sort by tag name
614        if (!$INPUT->has('sort')) {
615            $INPUT->set('sort', 'tid');
616        }
617
618        // initially set namespace filter to what is defined in syntax
619        if ($ns && !$INPUT->has('tagging__filters')) {
620            $INPUT->set('tagging__filters', ['ns' => $ns]);
621        }
622
623        return $this->html_table();
624    }
625
626    /**
627     * Display tag management table
628     */
629    public function html_table() {
630        global $ID, $INPUT;
631
632        $headers = array(
633            array('value' => $this->getLang('admin tag'), 'sort_by' => 'tid'),
634            array('value' => $this->getLang('admin occurrence'), 'sort_by' => 'count'),
635            array('value' => $this->getLang('admin writtenas'), 'sort_by' => 'orig'),
636            array('value' => $this->getLang('admin namespaces'), 'sort_by' => 'ns'),
637            array('value' => $this->getLang('admin taggers'), 'sort_by' => 'taggers'),
638            array('value' => $this->getLang('admin actions'), 'sort_by' => false),
639        );
640
641        $sort = explode(',', $INPUT->str('sort'));
642        $order_by = $sort[0];
643        $desc = false;
644        if (isset($sort[1]) && $sort[1] === 'desc') {
645            $desc = true;
646        }
647        $filters = $INPUT->arr('tagging__filters');
648
649        $tags = $this->getAllTags($INPUT->str('filter'), $order_by, $desc, $filters);
650
651        $form = new dokuwiki\Form\Form();
652        $form->setHiddenField('page', 'tagging');
653        $form->setHiddenField('id', $ID);
654        $form->setHiddenField('sort', $INPUT->str('sort'));
655
656        /**
657         * Actions dialog
658         */
659        $form->addTagOpen('div')->id('tagging__action-dialog')->attr('style', "display:none;");
660        $form->addTagClose('div');
661
662        /**
663         * Tag pages dialog
664         */
665        $form->addTagOpen('div')->id('tagging__taggedpages-dialog')->attr('style', "display:none;");
666        $form->addTagClose('div');
667
668        /**
669         * Tag management table
670         */
671        $form->addTagOpen('table')->addClass('inline plugin_tagging');
672
673        /**
674         * Table headers
675         */
676        $form->addTagOpen('tr');
677        foreach ($headers as $header) {
678            $form->addTagOpen('th');
679            if ($header['sort_by'] !== false) {
680                $param = $header['sort_by'];
681                $icon = 'arrow-both';
682                $title = $this->getLang('admin sort ascending');
683                if ($header['sort_by'] === $order_by) {
684                    if ($desc === false) {
685                        $icon = 'arrow-up';
686                        $title = $this->getLang('admin sort descending');
687                        $param .= ',desc';
688                    } else {
689                        $icon = 'arrow-down';
690                    }
691                }
692                $form->addButtonHTML(
693                    "fn[sort][$param]",
694                    $header['value'] . ' ' . inlineSVG(__DIR__ . "/images/$icon.svg"))
695                    ->addClass('plugin_tagging sort_button')
696                    ->attr('title', $title);
697            } else {
698                $form->addHTML($header['value']);
699            }
700            $form->addTagClose('th');
701        }
702        $form->addTagClose('tr');
703
704        /**
705         * Table filters for all sortable columns
706         */
707        $form->addTagOpen('tr');
708        foreach ($headers as $header) {
709            $form->addTagOpen('th');
710            if ($header['sort_by'] !== false) {
711                $field = $header['sort_by'];
712                $form->addTextInput("tagging__filters[$field]");
713            }
714            $form->addTagClose('th');
715        }
716        $form->addTagClose('tr');
717
718
719        foreach ($tags as $taginfo) {
720            $tagname = $taginfo['tid'];
721            $taggers = $taginfo['taggers'];
722            $written = $taginfo['orig'];
723            $ns = $taginfo['ns'];
724            $pids = explode(',',$taginfo['pids']);
725
726            $form->addTagOpen('tr');
727            $form->addHTML('<td>');
728            $form->addHTML('<a class="tagslist" href="#" data-pids="' . $taginfo['pids'] . '">');
729            $form->addHTML( hsc($tagname) . '</a>');
730            $form->addHTML('</td>');
731            $form->addHTML('<td>' . $taginfo['count'] . '</td>');
732            $form->addHTML('<td>' . hsc($written) . '</td>');
733            $form->addHTML('<td>' . hsc($ns) . '</td>');
734            $form->addHTML('<td>' . hsc($taggers) . '</td>');
735
736            /**
737             * action buttons
738             */
739            $form->addHTML('<td>');
740
741            // check ACLs
742            $userEdit = false;
743            /** @var \helper_plugin_sqlite $sqliteHelper */
744            $sqliteHelper = plugin_load('helper', 'sqlite');
745            foreach ($pids as $pid) {
746                if ($sqliteHelper->_getAccessLevel($pid) >= AUTH_EDIT) {
747                    $userEdit = true;
748                    continue;
749                }
750            }
751
752            if ($userEdit) {
753                $form->addButtonHTML(
754                    'fn[actions][rename][' . $taginfo['tid'] . ']',
755                    inlineSVG(__DIR__ . '/images/edit.svg'))
756                    ->addClass('plugin_tagging action_button')
757                    ->attr('data-action', 'rename')
758                    ->attr('data-tid', $taginfo['tid']);
759                $form->addButtonHTML(
760                    'fn[actions][delete][' . $taginfo['tid'] . ']',
761                    inlineSVG(__DIR__ . '/images/delete.svg'))
762                    ->addClass('plugin_tagging action_button')
763                    ->attr('data-action', 'delete')
764                    ->attr('data-tid', $taginfo['tid']);
765            }
766
767            $form->addHTML('</td>');
768            $form->addTagClose('tr');
769        }
770
771        $form->addTagClose('table');
772        return $form->toHTML();
773    }
774
775    /**
776     * Executes the query and returns the results as array
777     *
778     * @param array $query
779     * @return array
780     */
781    protected function queryDb($query)
782    {
783        $db = $this->getDB();
784        if (!$db) {
785            return [];
786        }
787
788        $res = $db->query($query[0], $query[1]);
789        $res = $db->res2arr($res);
790
791        $ret = [];
792        foreach ($res as $row) {
793            $ret[$row['item']] = $row['cnt'];
794        }
795        return $ret;
796    }
797
798    /**
799     * Construct the HAVING part of the search query
800     *
801     * @param array $filters
802     * @return array
803     */
804    protected function getFilterSql($filters)
805    {
806        $having = '';
807        $parts = [];
808        $params = [];
809        $filters = array_filter($filters);
810        if (!empty($filters)) {
811            $having = ' HAVING ';
812            foreach ($filters as $filter => $value) {
813                $parts[] = " $filter LIKE ? ";
814                $params[] = "%$value%";
815            }
816            $having .= implode(' AND ', $parts);
817        }
818        return [$having, $params];
819    }
820}
821