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source: github/program/include/rcube_contacts.php @ 62e2254

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Last change on this file since 62e2254 was 62e2254, checked in by alecpl <alec@…>, 2 years ago
Fix regexp matching field names
Property mode set to `100644`
File size: 27.1 KB

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1	<?php
2
3	/*
4	+-----------------------------------------------------------------------+
5	\| program/include/rcube_contacts.php \|
6	\| \|
7	\| This file is part of the Roundcube Webmail client \|
8	\| Copyright (C) 2006-2011, The Roundcube Dev Team \|
9	\| Licensed under the GNU GPL \|
10	\| \|
11	\| PURPOSE: \|
12	\| Interface to the local address book database \|
13	\| \|
14	+-----------------------------------------------------------------------+
15	\| Author: Thomas Bruederli <roundcube@gmail.com> \|
16	+-----------------------------------------------------------------------+
17
18	$Id$
19
20	*/
21
22
23	/**
24	* Model class for the local address book database
25	*
26	* @package Addressbook
27	*/
28	class rcube_contacts extends rcube_addressbook
29	{
30	// protected for backward compat. with some plugins
31	protected $db_name = 'contacts';
32	protected $db_groups = 'contactgroups';
33	protected $db_groupmembers = 'contactgroupmembers';
34
35	/**
36	* Store database connection.
37	*
38	* @var rcube_mdb2
39	*/
40	private $db = null;
41	private $user_id = 0;
42	private $filter = null;
43	private $result = null;
44	private $cache;
45	private $table_cols = array('name', 'email', 'firstname', 'surname');
46	private $fulltext_cols = array('name', 'firstname', 'surname', 'middlename', 'nickname',
47	'jobtitle', 'organization', 'department', 'maidenname', 'email', 'phone',
48	'address', 'street', 'locality', 'zipcode', 'region', 'country', 'website', 'im', 'notes');
49
50	// public properties
51	public $primary_key = 'contact_id';
52	public $readonly = false;
53	public $groups = true;
54	public $list_page = 1;
55	public $page_size = 10;
56	public $group_id = 0;
57	public $ready = false;
58	public $coltypes = array('name', 'firstname', 'surname', 'middlename', 'prefix', 'suffix', 'nickname',
59	'jobtitle', 'organization', 'department', 'assistant', 'manager',
60	'gender', 'maidenname', 'spouse', 'email', 'phone', 'address',
61	'birthday', 'anniversary', 'website', 'im', 'notes', 'photo');
62
63
64	/**
65	* Object constructor
66	*
67	* @param object Instance of the rcube_db class
68	* @param integer User-ID
69	*/
70	function __construct($dbconn, $user)
71	{
72	$this->db = $dbconn;
73	$this->user_id = $user;
74	$this->ready = $this->db && !$this->db->is_error();
75	}
76
77
78	/**
79	* Save a search string for future listings
80	*
81	* @param string SQL params to use in listing method
82	*/
83	function set_search_set($filter)
84	{
85	$this->filter = $filter;
86	$this->cache = null;
87	}
88
89
90	/**
91	* Getter for saved search properties
92	*
93	* @return mixed Search properties used by this class
94	*/
95	function get_search_set()
96	{
97	return $this->filter;
98	}
99
100
101	/**
102	* Setter for the current group
103	* (empty, has to be re-implemented by extending class)
104	*/
105	function set_group($gid)
106	{
107	$this->group_id = $gid;
108	$this->cache = null;
109	}
110
111
112	/**
113	* Reset all saved results and search parameters
114	*/
115	function reset()
116	{
117	$this->result = null;
118	$this->filter = null;
119	$this->cache = null;
120	}
121
122
123	/**
124	* List all active contact groups of this source
125	*
126	* @param string Search string to match group name
127	* @return array Indexed list of contact groups, each a hash array
128	*/
129	function list_groups($search = null)
130	{
131	$results = array();
132
133	if (!$this->groups)
134	return $results;
135
136	$sql_filter = $search ? " AND " . $this->db->ilike('name', '%'.$search.'%') : '';
137
138	$sql_result = $this->db->query(
139	"SELECT * FROM ".get_table_name($this->db_groups).
140	" WHERE del<>1".
141	" AND user_id=?".
142	$sql_filter.
143	" ORDER BY name",
144	$this->user_id);
145
146	while ($sql_result && ($sql_arr = $this->db->fetch_assoc($sql_result))) {
147	$sql_arr['ID'] = $sql_arr['contactgroup_id'];
148	$results[] = $sql_arr;
149	}
150
151	return $results;
152	}
153
154
155	/**
156	* List the current set of contact records
157	*
158	* @param array List of cols to show, Null means all
159	* @param int Only return this number of records, use negative values for tail
160	* @param boolean True to skip the count query (select only)
161	* @return array Indexed list of contact records, each a hash array
162	*/
163	function list_records($cols=null, $subset=0, $nocount=false)
164	{
165	if ($nocount \|\| $this->list_page <= 1) {
166	// create dummy result, we don't need a count now
167	$this->result = new rcube_result_set();
168	} else {
169	// count all records
170	$this->result = $this->count();
171	}
172
173	$start_row = $subset < 0 ? $this->result->first + $this->page_size + $subset : $this->result->first;
174	$length = $subset != 0 ? abs($subset) : $this->page_size;
175
176	if ($this->group_id)
177	$join = " LEFT JOIN ".get_table_name($this->db_groupmembers)." AS m".
178	" ON (m.contact_id = c.".$this->primary_key.")";
179
180	$sql_result = $this->db->limitquery(
181	"SELECT * FROM ".get_table_name($this->db_name)." AS c" .
182	$join .
183	" WHERE c.del<>1" .
184	" AND c.user_id=?" .
185	($this->group_id ? " AND m.contactgroup_id=?" : "").
186	($this->filter ? " AND (".$this->filter.")" : "") .
187	" ORDER BY ". $this->db->concat('c.name', 'c.email'),
188	$start_row,
189	$length,
190	$this->user_id,
191	$this->group_id);
192
193	// determine whether we have to parse the vcard or if only db cols are requested
194	$read_vcard = !$cols \|\| count(array_intersect($cols, $this->table_cols)) < count($cols);
195
196	while ($sql_result && ($sql_arr = $this->db->fetch_assoc($sql_result))) {
197	$sql_arr['ID'] = $sql_arr[$this->primary_key];
198
199	if ($read_vcard)
200	$sql_arr = $this->convert_db_data($sql_arr);
201	else
202	$sql_arr['email'] = preg_split('/,\s*/', $sql_arr['email']);
203
204	// make sure we have a name to display
205	if (empty($sql_arr['name'])) {
206	if (empty($sql_arr['email']))
207	$sql_arr['email'] = $this->get_col_values('email', $sql_arr, true);
208	$sql_arr['name'] = $sql_arr['email'][0];
209	}
210
211	$this->result->add($sql_arr);
212	}
213
214	$cnt = count($this->result->records);
215
216	// update counter
217	if ($nocount)
218	$this->result->count = $cnt;
219	else if ($this->list_page <= 1) {
220	if ($cnt < $this->page_size && $subset == 0)
221	$this->result->count = $cnt;
222	else if (isset($this->cache['count']))
223	$this->result->count = $this->cache['count'];
224	else
225	$this->result->count = $this->_count();
226	}
227
228	return $this->result;
229	}
230
231
232	/**
233	* Search contacts
234	*
235	* @param mixed $fields The field name of array of field names to search in
236	* @param mixed $value Search value (or array of values when $fields is array)
237	* @param boolean $strict True for strict (=), False for partial (LIKE) matching
238	* @param boolean $select True if results are requested, False if count only
239	* @param boolean $nocount True to skip the count query (select only)
240	* @param array $required List of fields that cannot be empty
241	*
242	* @return object rcube_result_set Contact records and 'count' value
243	*/
244	function search($fields, $value, $strict=false, $select=true, $nocount=false, $required=array())
245	{
246	if (!is_array($fields))
247	$fields = array($fields);
248	if (!is_array($required) && !empty($required))
249	$required = array($required);
250
251	$where = $and_where = array();
252
253	foreach ($fields as $idx => $col) {
254	// direct ID search
255	if ($col == 'ID' \|\| $col == $this->primary_key) {
256	$ids = !is_array($value) ? explode(',', $value) : $value;
257	$ids = $this->db->array2list($ids, 'integer');
258	$where[] = 'c.' . $this->primary_key.' IN ('.$ids.')';
259	continue;
260	}
261	// fulltext search in all fields
262	else if ($col == '*') {
263	$words = array();
264	foreach (explode(" ", self::normalize_string($value)) as $word)
265	$words[] = $this->db->ilike('words', '%'.$word.'%');
266	$where[] = '(' . join(' AND ', $words) . ')';
267	}
268	else {
269	$val = is_array($value) ? $value[$idx] : $value;
270	// table column
271	if (in_array($col, $this->table_cols)) {
272	if ($strict) {
273	$where[] = $this->db->quoteIdentifier($col).' = '.$this->db->quote($val);
274	}
275	else {
276	$where[] = $this->db->ilike($col, '%'.$val.'%');
277	}
278	}
279	// vCard field
280	else {
281	if (in_array($col, $this->fulltext_cols)) {
282	foreach (explode(" ", self::normalize_string($val)) as $word)
283	$words[] = $this->db->ilike('words', '%'.$word.'%');
284	$where[] = '(' . join(' AND ', $words) . ')';
285	}
286	if (is_array($value))
287	$post_search[$col] = mb_strtolower($val);
288	}
289	}
290	}
291
292	foreach ($required as $col) {
293	$and_where[] = $this->db->quoteIdentifier($col).' <> '.$this->db->quote('');
294	}
295
296	if (!empty($where)) {
297	// use AND operator for advanced searches
298	$where = join(is_array($value) ? ' AND ' : ' OR ', $where);
299	}
300
301	if (!empty($and_where))
302	$where = ($where ? "($where) AND " : '') . join(' AND ', $and_where);
303
304	// Post-searching in vCard data fields
305	// we will search in all records and then build a where clause for their IDs
306	if (!empty($post_search)) {
307	$ids = array(0);
308	// build key name regexp
309	$regexp = '/^(' . implode(array_keys($post_search), '\|') . ')(?:.*)$/';
310	// use initial WHERE clause, to limit records number if possible
311	if (!empty($where))
312	$this->set_search_set($where);
313
314	// count result pages
315	$cnt = $this->count();
316	$pages = ceil($cnt / $this->page_size);
317	$scnt = count($post_search);
318
319	// get (paged) result
320	for ($i=0; $i<$pages; $i++) {
321	$this->list_records(null, $i, true);
322	while ($row = $this->result->next()) {
323	$id = $row[$this->primary_key];
324	$found = array();
325	foreach (preg_grep($regexp, array_keys($row)) as $col) {
326	$pos = strpos($col, ':');
327	$colname = $pos ? substr($col, 0, $pos) : $col;
328	$search = $post_search[$colname];
329	foreach ((array)$row[$col] as $value) {
330	// composite field, e.g. address
331	if (is_array($value)) {
332	$value = implode($value);
333	}
334	$value = mb_strtolower($value);
335	if (($strict && $value == $search) \|\| (!$strict && strpos($value, $search) !== false)) {
336	$found[$colname] = true;
337	break;
338	}
339	}
340	}
341	// all fields match
342	if (count($found) >= $scnt) {
343	$ids[] = $id;
344	}
345	}
346	}
347
348	// build WHERE clause
349	$ids = $this->db->array2list($ids, 'integer');
350	$where = 'c.' . $this->primary_key.' IN ('.$ids.')';
351	// reset counter
352	unset($this->cache['count']);
353
354	// when we know we have an empty result
355	if ($ids == '0') {
356	$this->set_search_set($where);
357	return ($this->result = new rcube_result_set(0, 0));
358	}
359	}
360
361	if (!empty($where)) {
362	$this->set_search_set($where);
363	if ($select)
364	$this->list_records(null, 0, $nocount);
365	else
366	$this->result = $this->count();
367	}
368
369	return $this->result;
370	}
371
372
373	/**
374	* Count number of available contacts in database
375	*
376	* @return rcube_result_set Result object
377	*/
378	function count()
379	{
380	$count = isset($this->cache['count']) ? $this->cache['count'] : $this->_count();
381
382	return new rcube_result_set($count, ($this->list_page-1) * $this->page_size);
383	}
384
385
386	/**
387	* Count number of available contacts in database
388	*
389	* @return int Contacts count
390	*/
391	private function _count()
392	{
393	if ($this->group_id)
394	$join = " LEFT JOIN ".get_table_name($this->db_groupmembers)." AS m".
395	" ON (m.contact_id=c.".$this->primary_key.")";
396
397	// count contacts for this user
398	$sql_result = $this->db->query(
399	"SELECT COUNT(c.contact_id) AS rows".
400	" FROM ".get_table_name($this->db_name)." AS c".
401	$join.
402	" WHERE c.del<>1".
403	" AND c.user_id=?".
404	($this->group_id ? " AND m.contactgroup_id=?" : "").
405	($this->filter ? " AND (".$this->filter.")" : ""),
406	$this->user_id,
407	$this->group_id
408	);
409
410	$sql_arr = $this->db->fetch_assoc($sql_result);
411
412	$this->cache['count'] = (int) $sql_arr['rows'];
413
414	return $this->cache['count'];
415	}
416
417
418	/**
419	* Return the last result set
420	*
421	* @return mixed Result array or NULL if nothing selected yet
422	*/
423	function get_result()
424	{
425	return $this->result;
426	}
427
428
429	/**
430	* Get a specific contact record
431	*
432	* @param mixed record identifier(s)
433	* @return mixed Result object with all record fields or False if not found
434	*/
435	function get_record($id, $assoc=false)
436	{
437	// return cached result
438	if ($this->result && ($first = $this->result->first()) && $first[$this->primary_key] == $id)
439	return $assoc ? $first : $this->result;
440
441	$this->db->query(
442	"SELECT * FROM ".get_table_name($this->db_name).
443	" WHERE contact_id=?".
444	" AND user_id=?".
445	" AND del<>1",
446	$id,
447	$this->user_id
448	);
449
450	if ($sql_arr = $this->db->fetch_assoc()) {
451	$record = $this->convert_db_data($sql_arr);
452	$this->result = new rcube_result_set(1);
453	$this->result->add($record);
454	}
455
456	return $assoc && $record ? $record : $this->result;
457	}
458
459
460	/**
461	* Get group assignments of a specific contact record
462	*
463	* @param mixed Record identifier
464	* @return array List of assigned groups as ID=>Name pairs
465	*/
466	function get_record_groups($id)
467	{
468	$results = array();
469
470	if (!$this->groups)
471	return $results;
472
473	$sql_result = $this->db->query(
474	"SELECT cgm.contactgroup_id, cg.name FROM " . get_table_name($this->db_groupmembers) . " AS cgm" .
475	" LEFT JOIN " . get_table_name($this->db_groups) . " AS cg ON (cgm.contactgroup_id = cg.contactgroup_id AND cg.del<>1)" .
476	" WHERE cgm.contact_id=?",
477	$id
478	);
479	while ($sql_result && ($sql_arr = $this->db->fetch_assoc($sql_result))) {
480	$results[$sql_arr['contactgroup_id']] = $sql_arr['name'];
481	}
482
483	return $results;
484	}
485
486
487	/**
488	* Check the given data before saving.
489	* If input not valid, the message to display can be fetched using get_error()
490	*
491	* @param array Assoziative array with data to save
492	* @return boolean True if input is valid, False if not.
493	*/
494	public function validate($save_data)
495	{
496	// validate e-mail addresses
497	$valid = parent::validate($save_data);
498
499	// require at least one e-mail address (syntax check is already done)
500	if ($valid && !array_filter($this->get_col_values('email', $save_data, true))) {
501	$this->set_error('warning', 'noemailwarning');
502	$valid = false;
503	}
504
505	return $valid;
506	}
507
508
509	/**
510	* Create a new contact record
511	*
512	* @param array Associative array with save data
513	* @return integer\|boolean The created record ID on success, False on error
514	*/
515	function insert($save_data, $check=false)
516	{
517	if (!is_array($save_data))
518	return false;
519
520	$insert_id = $existing = false;
521
522	if ($check) {
523	foreach ($save_data as $col => $values) {
524	if (strpos($col, 'email') === 0) {
525	foreach ((array)$values as $email) {
526	if ($existing = $this->search('email', $email, false, false))
527	break 2;
528	}
529	}
530	}
531	}
532
533	$save_data = $this->convert_save_data($save_data);
534	$a_insert_cols = $a_insert_values = array();
535
536	foreach ($save_data as $col => $value) {
537	$a_insert_cols[] = $this->db->quoteIdentifier($col);
538	$a_insert_values[] = $this->db->quote($value);
539	}
540
541	if (!$existing->count && !empty($a_insert_cols)) {
542	$this->db->query(
543	"INSERT INTO ".get_table_name($this->db_name).
544	" (user_id, changed, del, ".join(', ', $a_insert_cols).")".
545	" VALUES (".intval($this->user_id).", ".$this->db->now().", 0, ".join(', ', $a_insert_values).")"
546	);
547
548	$insert_id = $this->db->insert_id($this->db_name);
549	}
550
551	// also add the newly created contact to the active group
552	if ($insert_id && $this->group_id)
553	$this->add_to_group($this->group_id, $insert_id);
554
555	$this->cache = null;
556
557	return $insert_id;
558	}
559
560
561	/**
562	* Update a specific contact record
563	*
564	* @param mixed Record identifier
565	* @param array Assoziative array with save data
566	* @return boolean True on success, False on error
567	*/
568	function update($id, $save_cols)
569	{
570	$updated = false;
571	$write_sql = array();
572	$record = $this->get_record($id, true);
573	$save_cols = $this->convert_save_data($save_cols, $record);
574
575	foreach ($save_cols as $col => $value) {
576	$write_sql[] = sprintf("%s=%s", $this->db->quoteIdentifier($col), $this->db->quote($value));
577	}
578
579	if (!empty($write_sql)) {
580	$this->db->query(
581	"UPDATE ".get_table_name($this->db_name).
582	" SET changed=".$this->db->now().", ".join(', ', $write_sql).
583	" WHERE contact_id=?".
584	" AND user_id=?".
585	" AND del<>1",
586	$id,
587	$this->user_id
588	);
589
590	$updated = $this->db->affected_rows();
591	$this->result = null; // clear current result (from get_record())
592	}
593
594	return $updated;
595	}
596
597
598	private function convert_db_data($sql_arr)
599	{
600	$record = array();
601	$record['ID'] = $sql_arr[$this->primary_key];
602
603	if ($sql_arr['vcard']) {
604	unset($sql_arr['email']);
605	$vcard = new rcube_vcard($sql_arr['vcard']);
606	$record += $vcard->get_assoc() + $sql_arr;
607	}
608	else {
609	$record += $sql_arr;
610	$record['email'] = preg_split('/,\s*/', $record['email']);
611	}
612
613	return $record;
614	}
615
616
617	private function convert_save_data($save_data, $record = array())
618	{
619	$out = array();
620	$words = '';
621
622	// copy values into vcard object
623	$vcard = new rcube_vcard($record['vcard'] ? $record['vcard'] : $save_data['vcard']);
624	$vcard->reset();
625	foreach ($save_data as $key => $values) {
626	list($field, $section) = explode(':', $key);
627	$fulltext = in_array($field, $this->fulltext_cols);
628	foreach ((array)$values as $value) {
629	if (isset($value))
630	$vcard->set($field, $value, $section);
631	if ($fulltext && is_array($value))
632	$words .= ' ' . self::normalize_string(join(" ", $value));
633	else if ($fulltext && strlen($value) >= 3)
634	$words .= ' ' . self::normalize_string($value);
635	}
636	}
637	$out['vcard'] = $vcard->export(false);
638
639	foreach ($this->table_cols as $col) {
640	$key = $col;
641	if (!isset($save_data[$key]))
642	$key .= ':home';
643	if (isset($save_data[$key]))
644	$out[$col] = is_array($save_data[$key]) ? join(',', $save_data[$key]) : $save_data[$key];
645	}
646
647	// save all e-mails in database column
648	$out['email'] = join(", ", $vcard->email);
649
650	// join words for fulltext search
651	$out['words'] = join(" ", array_unique(explode(" ", $words)));
652
653	return $out;
654	}
655
656
657	/**
658	* Mark one or more contact records as deleted
659	*
660	* @param array Record identifiers
661	*/
662	function delete($ids)
663	{
664	if (!is_array($ids))
665	$ids = explode(',', $ids);
666
667	$ids = $this->db->array2list($ids, 'integer');
668
669	// flag record as deleted
670	$this->db->query(
671	"UPDATE ".get_table_name($this->db_name).
672	" SET del=1, changed=".$this->db->now().
673	" WHERE user_id=?".
674	" AND contact_id IN ($ids)",
675	$this->user_id
676	);
677
678	$this->cache = null;
679
680	return $this->db->affected_rows();
681	}
682
683
684	/**
685	* Remove all records from the database
686	*/
687	function delete_all()
688	{
689	$this->db->query("DELETE FROM ".get_table_name($this->db_name)." WHERE user_id = ?", $this->user_id);
690	$this->cache = null;
691	return $this->db->affected_rows();
692	}
693
694
695	/**
696	* Create a contact group with the given name
697	*
698	* @param string The group name
699	* @return mixed False on error, array with record props in success
700	*/
701	function create_group($name)
702	{
703	$result = false;
704
705	// make sure we have a unique name
706	$name = $this->unique_groupname($name);
707
708	$this->db->query(
709	"INSERT INTO ".get_table_name($this->db_groups).
710	" (user_id, changed, name)".
711	" VALUES (".intval($this->user_id).", ".$this->db->now().", ".$this->db->quote($name).")"
712	);
713
714	if ($insert_id = $this->db->insert_id($this->db_groups))
715	$result = array('id' => $insert_id, 'name' => $name);
716
717	return $result;
718	}
719
720
721	/**
722	* Delete the given group (and all linked group members)
723	*
724	* @param string Group identifier
725	* @return boolean True on success, false if no data was changed
726	*/
727	function delete_group($gid)
728	{
729	// flag group record as deleted
730	$sql_result = $this->db->query(
731	"UPDATE ".get_table_name($this->db_groups).
732	" SET del=1, changed=".$this->db->now().
733	" WHERE contactgroup_id=?",
734	$gid
735	);
736
737	$this->cache = null;
738
739	return $this->db->affected_rows();
740	}
741
742
743	/**
744	* Rename a specific contact group
745	*
746	* @param string Group identifier
747	* @param string New name to set for this group
748	* @return boolean New name on success, false if no data was changed
749	*/
750	function rename_group($gid, $newname)
751	{
752	// make sure we have a unique name
753	$name = $this->unique_groupname($newname);
754
755	$sql_result = $this->db->query(
756	"UPDATE ".get_table_name($this->db_groups).
757	" SET name=?, changed=".$this->db->now().
758	" WHERE contactgroup_id=?",
759	$name, $gid
760	);
761
762	return $this->db->affected_rows() ? $name : false;
763	}
764
765
766	/**
767	* Add the given contact records the a certain group
768	*
769	* @param string Group identifier
770	* @param array List of contact identifiers to be added
771	* @return int Number of contacts added
772	*/
773	function add_to_group($group_id, $ids)
774	{
775	if (!is_array($ids))
776	$ids = explode(',', $ids);
777
778	$added = 0;
779	$exists = array();
780
781	// get existing assignments ...
782	$sql_result = $this->db->query(
783	"SELECT contact_id FROM ".get_table_name($this->db_groupmembers).
784	" WHERE contactgroup_id=?".
785	" AND contact_id IN (".$this->db->array2list($ids, 'integer').")",
786	$group_id
787	);
788	while ($sql_result && ($sql_arr = $this->db->fetch_assoc($sql_result))) {
789	$exists[] = $sql_arr['contact_id'];
790	}
791	// ... and remove them from the list
792	$ids = array_diff($ids, $exists);
793
794	foreach ($ids as $contact_id) {
795	$this->db->query(
796	"INSERT INTO ".get_table_name($this->db_groupmembers).
797	" (contactgroup_id, contact_id, created)".
798	" VALUES (?, ?, ".$this->db->now().")",
799	$group_id,
800	$contact_id
801	);
802
803	if (!$this->db->db_error)
804	$added++;
805	}
806
807	return $added;
808	}
809
810
811	/**
812	* Remove the given contact records from a certain group
813	*
814	* @param string Group identifier
815	* @param array List of contact identifiers to be removed
816	* @return int Number of deleted group members
817	*/
818	function remove_from_group($group_id, $ids)
819	{
820	if (!is_array($ids))
821	$ids = explode(',', $ids);
822
823	$ids = $this->db->array2list($ids, 'integer');
824
825	$sql_result = $this->db->query(
826	"DELETE FROM ".get_table_name($this->db_groupmembers).
827	" WHERE contactgroup_id=?".
828	" AND contact_id IN ($ids)",
829	$group_id
830	);
831
832	return $this->db->affected_rows();
833	}
834
835
836	/**
837	* Check for existing groups with the same name
838	*
839	* @param string Name to check
840	* @return string A group name which is unique for the current use
841	*/
842	private function unique_groupname($name)
843	{
844	$checkname = $name;
845	$num = 2; $hit = false;
846
847	do {
848	$sql_result = $this->db->query(
849	"SELECT 1 FROM ".get_table_name($this->db_groups).
850	" WHERE del<>1".
851	" AND user_id=?".
852	" AND name=?",
853	$this->user_id,
854	$checkname);
855
856	// append number to make name unique
857	if ($hit = $this->db->num_rows($sql_result))
858	$checkname = $name . ' ' . $num++;
859	} while ($hit > 0);
860
861	return $checkname;
862	}
863
864	}

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