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source: github/program/include/rcube_contacts.php @ cc90ed1

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Last change on this file since cc90ed1 was cc90ed1, checked in by alecpl <alec@…>, 2 years ago
Add addressbook name in contact info frame (#1487958)
Property mode set to `100644`
File size: 27.2 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 $name;
45	private $cache;
46	private $table_cols = array('name', 'email', 'firstname', 'surname');
47	private $fulltext_cols = array('name', 'firstname', 'surname', 'middlename', 'nickname',
48	'jobtitle', 'organization', 'department', 'maidenname', 'email', 'phone',
49	'address', 'street', 'locality', 'zipcode', 'region', 'country', 'website', 'im', 'notes');
50
51	// public properties
52	public $primary_key = 'contact_id';
53	public $readonly = false;
54	public $groups = true;
55	public $list_page = 1;
56	public $page_size = 10;
57	public $group_id = 0;
58	public $ready = false;
59	public $coltypes = array('name', 'firstname', 'surname', 'middlename', 'prefix', 'suffix', 'nickname',
60	'jobtitle', 'organization', 'department', 'assistant', 'manager',
61	'gender', 'maidenname', 'spouse', 'email', 'phone', 'address',
62	'birthday', 'anniversary', 'website', 'im', 'notes', 'photo');
63
64
65	/**
66	* Object constructor
67	*
68	* @param object Instance of the rcube_db class
69	* @param integer User-ID
70	*/
71	function __construct($dbconn, $user)
72	{
73	$this->db = $dbconn;
74	$this->user_id = $user;
75	$this->ready = $this->db && !$this->db->is_error();
76	}
77
78
79	/**
80	* Returns addressbook name
81	*/
82	function get_name()
83	{
84	return $this->name;
85	}
86
87
88	/**
89	* Save a search string for future listings
90	*
91	* @param string SQL params to use in listing method
92	*/
93	function set_search_set($filter)
94	{
95	$this->filter = $filter;
96	$this->cache = null;
97	}
98
99
100	/**
101	* Getter for saved search properties
102	*
103	* @return mixed Search properties used by this class
104	*/
105	function get_search_set()
106	{
107	return $this->filter;
108	}
109
110
111	/**
112	* Setter for the current group
113	* (empty, has to be re-implemented by extending class)
114	*/
115	function set_group($gid)
116	{
117	$this->group_id = $gid;
118	$this->cache = null;
119	}
120
121
122	/**
123	* Reset all saved results and search parameters
124	*/
125	function reset()
126	{
127	$this->result = null;
128	$this->filter = null;
129	$this->cache = null;
130	}
131
132
133	/**
134	* List all active contact groups of this source
135	*
136	* @param string Search string to match group name
137	* @return array Indexed list of contact groups, each a hash array
138	*/
139	function list_groups($search = null)
140	{
141	$results = array();
142
143	if (!$this->groups)
144	return $results;
145
146	$sql_filter = $search ? " AND " . $this->db->ilike('name', '%'.$search.'%') : '';
147
148	$sql_result = $this->db->query(
149	"SELECT * FROM ".get_table_name($this->db_groups).
150	" WHERE del<>1".
151	" AND user_id=?".
152	$sql_filter.
153	" ORDER BY name",
154	$this->user_id);
155
156	while ($sql_result && ($sql_arr = $this->db->fetch_assoc($sql_result))) {
157	$sql_arr['ID'] = $sql_arr['contactgroup_id'];
158	$results[] = $sql_arr;
159	}
160
161	return $results;
162	}
163
164
165	/**
166	* List the current set of contact records
167	*
168	* @param array List of cols to show, Null means all
169	* @param int Only return this number of records, use negative values for tail
170	* @param boolean True to skip the count query (select only)
171	* @return array Indexed list of contact records, each a hash array
172	*/
173	function list_records($cols=null, $subset=0, $nocount=false)
174	{
175	if ($nocount \|\| $this->list_page <= 1) {
176	// create dummy result, we don't need a count now
177	$this->result = new rcube_result_set();
178	} else {
179	// count all records
180	$this->result = $this->count();
181	}
182
183	$start_row = $subset < 0 ? $this->result->first + $this->page_size + $subset : $this->result->first;
184	$length = $subset != 0 ? abs($subset) : $this->page_size;
185
186	if ($this->group_id)
187	$join = " LEFT JOIN ".get_table_name($this->db_groupmembers)." AS m".
188	" ON (m.contact_id = c.".$this->primary_key.")";
189
190	$sql_result = $this->db->limitquery(
191	"SELECT * FROM ".get_table_name($this->db_name)." AS c" .
192	$join .
193	" WHERE c.del<>1" .
194	" AND c.user_id=?" .
195	($this->group_id ? " AND m.contactgroup_id=?" : "").
196	($this->filter ? " AND (".$this->filter.")" : "") .
197	" ORDER BY ". $this->db->concat('c.name', 'c.email'),
198	$start_row,
199	$length,
200	$this->user_id,
201	$this->group_id);
202
203	// determine whether we have to parse the vcard or if only db cols are requested
204	$read_vcard = !$cols \|\| count(array_intersect($cols, $this->table_cols)) < count($cols);
205
206	while ($sql_result && ($sql_arr = $this->db->fetch_assoc($sql_result))) {
207	$sql_arr['ID'] = $sql_arr[$this->primary_key];
208
209	if ($read_vcard)
210	$sql_arr = $this->convert_db_data($sql_arr);
211	else
212	$sql_arr['email'] = preg_split('/,\s*/', $sql_arr['email']);
213
214	// make sure we have a name to display
215	if (empty($sql_arr['name'])) {
216	if (empty($sql_arr['email']))
217	$sql_arr['email'] = $this->get_col_values('email', $sql_arr, true);
218	$sql_arr['name'] = $sql_arr['email'][0];
219	}
220
221	$this->result->add($sql_arr);
222	}
223
224	$cnt = count($this->result->records);
225
226	// update counter
227	if ($nocount)
228	$this->result->count = $cnt;
229	else if ($this->list_page <= 1) {
230	if ($cnt < $this->page_size && $subset == 0)
231	$this->result->count = $cnt;
232	else if (isset($this->cache['count']))
233	$this->result->count = $this->cache['count'];
234	else
235	$this->result->count = $this->_count();
236	}
237
238	return $this->result;
239	}
240
241
242	/**
243	* Search contacts
244	*
245	* @param mixed $fields The field name of array of field names to search in
246	* @param mixed $value Search value (or array of values when $fields is array)
247	* @param boolean $strict True for strict (=), False for partial (LIKE) matching
248	* @param boolean $select True if results are requested, False if count only
249	* @param boolean $nocount True to skip the count query (select only)
250	* @param array $required List of fields that cannot be empty
251	*
252	* @return object rcube_result_set Contact records and 'count' value
253	*/
254	function search($fields, $value, $strict=false, $select=true, $nocount=false, $required=array())
255	{
256	if (!is_array($fields))
257	$fields = array($fields);
258	if (!is_array($required) && !empty($required))
259	$required = array($required);
260
261	$where = $and_where = array();
262
263	foreach ($fields as $idx => $col) {
264	// direct ID search
265	if ($col == 'ID' \|\| $col == $this->primary_key) {
266	$ids = !is_array($value) ? explode(',', $value) : $value;
267	$ids = $this->db->array2list($ids, 'integer');
268	$where[] = 'c.' . $this->primary_key.' IN ('.$ids.')';
269	continue;
270	}
271	// fulltext search in all fields
272	else if ($col == '*') {
273	$words = array();
274	foreach (explode(" ", self::normalize_string($value)) as $word)
275	$words[] = $this->db->ilike('words', '%'.$word.'%');
276	$where[] = '(' . join(' AND ', $words) . ')';
277	}
278	else {
279	$val = is_array($value) ? $value[$idx] : $value;
280	// table column
281	if (in_array($col, $this->table_cols)) {
282	if ($strict) {
283	$where[] = $this->db->quoteIdentifier($col).' = '.$this->db->quote($val);
284	}
285	else {
286	$where[] = $this->db->ilike($col, '%'.$val.'%');
287	}
288	}
289	// vCard field
290	else {
291	if (in_array($col, $this->fulltext_cols)) {
292	foreach (explode(" ", self::normalize_string($val)) as $word)
293	$words[] = $this->db->ilike('words', '%'.$word.'%');
294	$where[] = '(' . join(' AND ', $words) . ')';
295	}
296	if (is_array($value))
297	$post_search[$col] = mb_strtolower($val);
298	}
299	}
300	}
301
302	foreach ($required as $col) {
303	$and_where[] = $this->db->quoteIdentifier($col).' <> '.$this->db->quote('');
304	}
305
306	if (!empty($where)) {
307	// use AND operator for advanced searches
308	$where = join(is_array($value) ? ' AND ' : ' OR ', $where);
309	}
310
311	if (!empty($and_where))
312	$where = ($where ? "($where) AND " : '') . join(' AND ', $and_where);
313
314	// Post-searching in vCard data fields
315	// we will search in all records and then build a where clause for their IDs
316	if (!empty($post_search)) {
317	$ids = array(0);
318	// build key name regexp
319	$regexp = '/^(' . implode(array_keys($post_search), '\|') . ')(?:.*)$/';
320	// use initial WHERE clause, to limit records number if possible
321	if (!empty($where))
322	$this->set_search_set($where);
323
324	// count result pages
325	$cnt = $this->count();
326	$pages = ceil($cnt / $this->page_size);
327	$scnt = count($post_search);
328
329	// get (paged) result
330	for ($i=0; $i<$pages; $i++) {
331	$this->list_records(null, $i, true);
332	while ($row = $this->result->next()) {
333	$id = $row[$this->primary_key];
334	$found = array();
335	foreach (preg_grep($regexp, array_keys($row)) as $col) {
336	$pos = strpos($col, ':');
337	$colname = $pos ? substr($col, 0, $pos) : $col;
338	$search = $post_search[$colname];
339	foreach ((array)$row[$col] as $value) {
340	// composite field, e.g. address
341	if (is_array($value)) {
342	$value = implode($value);
343	}
344	$value = mb_strtolower($value);
345	if (($strict && $value == $search) \|\| (!$strict && strpos($value, $search) !== false)) {
346	$found[$colname] = true;
347	break;
348	}
349	}
350	}
351	// all fields match
352	if (count($found) >= $scnt) {
353	$ids[] = $id;
354	}
355	}
356	}
357
358	// build WHERE clause
359	$ids = $this->db->array2list($ids, 'integer');
360	$where = 'c.' . $this->primary_key.' IN ('.$ids.')';
361	// reset counter
362	unset($this->cache['count']);
363
364	// when we know we have an empty result
365	if ($ids == '0') {
366	$this->set_search_set($where);
367	return ($this->result = new rcube_result_set(0, 0));
368	}
369	}
370
371	if (!empty($where)) {
372	$this->set_search_set($where);
373	if ($select)
374	$this->list_records(null, 0, $nocount);
375	else
376	$this->result = $this->count();
377	}
378
379	return $this->result;
380	}
381
382
383	/**
384	* Count number of available contacts in database
385	*
386	* @return rcube_result_set Result object
387	*/
388	function count()
389	{
390	$count = isset($this->cache['count']) ? $this->cache['count'] : $this->_count();
391
392	return new rcube_result_set($count, ($this->list_page-1) * $this->page_size);
393	}
394
395
396	/**
397	* Count number of available contacts in database
398	*
399	* @return int Contacts count
400	*/
401	private function _count()
402	{
403	if ($this->group_id)
404	$join = " LEFT JOIN ".get_table_name($this->db_groupmembers)." AS m".
405	" ON (m.contact_id=c.".$this->primary_key.")";
406
407	// count contacts for this user
408	$sql_result = $this->db->query(
409	"SELECT COUNT(c.contact_id) AS rows".
410	" FROM ".get_table_name($this->db_name)." AS c".
411	$join.
412	" WHERE c.del<>1".
413	" AND c.user_id=?".
414	($this->group_id ? " AND m.contactgroup_id=?" : "").
415	($this->filter ? " AND (".$this->filter.")" : ""),
416	$this->user_id,
417	$this->group_id
418	);
419
420	$sql_arr = $this->db->fetch_assoc($sql_result);
421
422	$this->cache['count'] = (int) $sql_arr['rows'];
423
424	return $this->cache['count'];
425	}
426
427
428	/**
429	* Return the last result set
430	*
431	* @return mixed Result array or NULL if nothing selected yet
432	*/
433	function get_result()
434	{
435	return $this->result;
436	}
437
438
439	/**
440	* Get a specific contact record
441	*
442	* @param mixed record identifier(s)
443	* @return mixed Result object with all record fields or False if not found
444	*/
445	function get_record($id, $assoc=false)
446	{
447	// return cached result
448	if ($this->result && ($first = $this->result->first()) && $first[$this->primary_key] == $id)
449	return $assoc ? $first : $this->result;
450
451	$this->db->query(
452	"SELECT * FROM ".get_table_name($this->db_name).
453	" WHERE contact_id=?".
454	" AND user_id=?".
455	" AND del<>1",
456	$id,
457	$this->user_id
458	);
459
460	if ($sql_arr = $this->db->fetch_assoc()) {
461	$record = $this->convert_db_data($sql_arr);
462	$this->result = new rcube_result_set(1);
463	$this->result->add($record);
464	}
465
466	return $assoc && $record ? $record : $this->result;
467	}
468
469
470	/**
471	* Get group assignments of a specific contact record
472	*
473	* @param mixed Record identifier
474	* @return array List of assigned groups as ID=>Name pairs
475	*/
476	function get_record_groups($id)
477	{
478	$results = array();
479
480	if (!$this->groups)
481	return $results;
482
483	$sql_result = $this->db->query(
484	"SELECT cgm.contactgroup_id, cg.name FROM " . get_table_name($this->db_groupmembers) . " AS cgm" .
485	" LEFT JOIN " . get_table_name($this->db_groups) . " AS cg ON (cgm.contactgroup_id = cg.contactgroup_id AND cg.del<>1)" .
486	" WHERE cgm.contact_id=?",
487	$id
488	);
489	while ($sql_result && ($sql_arr = $this->db->fetch_assoc($sql_result))) {
490	$results[$sql_arr['contactgroup_id']] = $sql_arr['name'];
491	}
492
493	return $results;
494	}
495
496
497	/**
498	* Check the given data before saving.
499	* If input not valid, the message to display can be fetched using get_error()
500	*
501	* @param array Assoziative array with data to save
502	* @return boolean True if input is valid, False if not.
503	*/
504	public function validate($save_data)
505	{
506	// validate e-mail addresses
507	$valid = parent::validate($save_data);
508
509	// require at least one e-mail address (syntax check is already done)
510	if ($valid && !array_filter($this->get_col_values('email', $save_data, true))) {
511	$this->set_error('warning', 'noemailwarning');
512	$valid = false;
513	}
514
515	return $valid;
516	}
517
518
519	/**
520	* Create a new contact record
521	*
522	* @param array Associative array with save data
523	* @return integer\|boolean The created record ID on success, False on error
524	*/
525	function insert($save_data, $check=false)
526	{
527	if (!is_array($save_data))
528	return false;
529
530	$insert_id = $existing = false;
531
532	if ($check) {
533	foreach ($save_data as $col => $values) {
534	if (strpos($col, 'email') === 0) {
535	foreach ((array)$values as $email) {
536	if ($existing = $this->search('email', $email, false, false))
537	break 2;
538	}
539	}
540	}
541	}
542
543	$save_data = $this->convert_save_data($save_data);
544	$a_insert_cols = $a_insert_values = array();
545
546	foreach ($save_data as $col => $value) {
547	$a_insert_cols[] = $this->db->quoteIdentifier($col);
548	$a_insert_values[] = $this->db->quote($value);
549	}
550
551	if (!$existing->count && !empty($a_insert_cols)) {
552	$this->db->query(
553	"INSERT INTO ".get_table_name($this->db_name).
554	" (user_id, changed, del, ".join(', ', $a_insert_cols).")".
555	" VALUES (".intval($this->user_id).", ".$this->db->now().", 0, ".join(', ', $a_insert_values).")"
556	);
557
558	$insert_id = $this->db->insert_id($this->db_name);
559	}
560
561	// also add the newly created contact to the active group
562	if ($insert_id && $this->group_id)
563	$this->add_to_group($this->group_id, $insert_id);
564
565	$this->cache = null;
566
567	return $insert_id;
568	}
569
570
571	/**
572	* Update a specific contact record
573	*
574	* @param mixed Record identifier
575	* @param array Assoziative array with save data
576	* @return boolean True on success, False on error
577	*/
578	function update($id, $save_cols)
579	{
580	$updated = false;
581	$write_sql = array();
582	$record = $this->get_record($id, true);
583	$save_cols = $this->convert_save_data($save_cols, $record);
584
585	foreach ($save_cols as $col => $value) {
586	$write_sql[] = sprintf("%s=%s", $this->db->quoteIdentifier($col), $this->db->quote($value));
587	}
588
589	if (!empty($write_sql)) {
590	$this->db->query(
591	"UPDATE ".get_table_name($this->db_name).
592	" SET changed=".$this->db->now().", ".join(', ', $write_sql).
593	" WHERE contact_id=?".
594	" AND user_id=?".
595	" AND del<>1",
596	$id,
597	$this->user_id
598	);
599
600	$updated = $this->db->affected_rows();
601	$this->result = null; // clear current result (from get_record())
602	}
603
604	return $updated;
605	}
606
607
608	private function convert_db_data($sql_arr)
609	{
610	$record = array();
611	$record['ID'] = $sql_arr[$this->primary_key];
612
613	if ($sql_arr['vcard']) {
614	unset($sql_arr['email']);
615	$vcard = new rcube_vcard($sql_arr['vcard']);
616	$record += $vcard->get_assoc() + $sql_arr;
617	}
618	else {
619	$record += $sql_arr;
620	$record['email'] = preg_split('/,\s*/', $record['email']);
621	}
622
623	return $record;
624	}
625
626
627	private function convert_save_data($save_data, $record = array())
628	{
629	$out = array();
630	$words = '';
631
632	// copy values into vcard object
633	$vcard = new rcube_vcard($record['vcard'] ? $record['vcard'] : $save_data['vcard']);
634	$vcard->reset();
635	foreach ($save_data as $key => $values) {
636	list($field, $section) = explode(':', $key);
637	$fulltext = in_array($field, $this->fulltext_cols);
638	foreach ((array)$values as $value) {
639	if (isset($value))
640	$vcard->set($field, $value, $section);
641	if ($fulltext && is_array($value))
642	$words .= ' ' . self::normalize_string(join(" ", $value));
643	else if ($fulltext && strlen($value) >= 3)
644	$words .= ' ' . self::normalize_string($value);
645	}
646	}
647	$out['vcard'] = $vcard->export(false);
648
649	foreach ($this->table_cols as $col) {
650	$key = $col;
651	if (!isset($save_data[$key]))
652	$key .= ':home';
653	if (isset($save_data[$key]))
654	$out[$col] = is_array($save_data[$key]) ? join(',', $save_data[$key]) : $save_data[$key];
655	}
656
657	// save all e-mails in database column
658	$out['email'] = join(", ", $vcard->email);
659
660	// join words for fulltext search
661	$out['words'] = join(" ", array_unique(explode(" ", $words)));
662
663	return $out;
664	}
665
666
667	/**
668	* Mark one or more contact records as deleted
669	*
670	* @param array Record identifiers
671	*/
672	function delete($ids)
673	{
674	if (!is_array($ids))
675	$ids = explode(',', $ids);
676
677	$ids = $this->db->array2list($ids, 'integer');
678
679	// flag record as deleted
680	$this->db->query(
681	"UPDATE ".get_table_name($this->db_name).
682	" SET del=1, changed=".$this->db->now().
683	" WHERE user_id=?".
684	" AND contact_id IN ($ids)",
685	$this->user_id
686	);
687
688	$this->cache = null;
689
690	return $this->db->affected_rows();
691	}
692
693
694	/**
695	* Remove all records from the database
696	*/
697	function delete_all()
698	{
699	$this->db->query("DELETE FROM ".get_table_name($this->db_name)." WHERE user_id = ?", $this->user_id);
700	$this->cache = null;
701	return $this->db->affected_rows();
702	}
703
704
705	/**
706	* Create a contact group with the given name
707	*
708	* @param string The group name
709	* @return mixed False on error, array with record props in success
710	*/
711	function create_group($name)
712	{
713	$result = false;
714
715	// make sure we have a unique name
716	$name = $this->unique_groupname($name);
717
718	$this->db->query(
719	"INSERT INTO ".get_table_name($this->db_groups).
720	" (user_id, changed, name)".
721	" VALUES (".intval($this->user_id).", ".$this->db->now().", ".$this->db->quote($name).")"
722	);
723
724	if ($insert_id = $this->db->insert_id($this->db_groups))
725	$result = array('id' => $insert_id, 'name' => $name);
726
727	return $result;
728	}
729
730
731	/**
732	* Delete the given group (and all linked group members)
733	*
734	* @param string Group identifier
735	* @return boolean True on success, false if no data was changed
736	*/
737	function delete_group($gid)
738	{
739	// flag group record as deleted
740	$sql_result = $this->db->query(
741	"UPDATE ".get_table_name($this->db_groups).
742	" SET del=1, changed=".$this->db->now().
743	" WHERE contactgroup_id=?",
744	$gid
745	);
746
747	$this->cache = null;
748
749	return $this->db->affected_rows();
750	}
751
752
753	/**
754	* Rename a specific contact group
755	*
756	* @param string Group identifier
757	* @param string New name to set for this group
758	* @return boolean New name on success, false if no data was changed
759	*/
760	function rename_group($gid, $newname)
761	{
762	// make sure we have a unique name
763	$name = $this->unique_groupname($newname);
764
765	$sql_result = $this->db->query(
766	"UPDATE ".get_table_name($this->db_groups).
767	" SET name=?, changed=".$this->db->now().
768	" WHERE contactgroup_id=?",
769	$name, $gid
770	);
771
772	return $this->db->affected_rows() ? $name : false;
773	}
774
775
776	/**
777	* Add the given contact records the a certain group
778	*
779	* @param string Group identifier
780	* @param array List of contact identifiers to be added
781	* @return int Number of contacts added
782	*/
783	function add_to_group($group_id, $ids)
784	{
785	if (!is_array($ids))
786	$ids = explode(',', $ids);
787
788	$added = 0;
789	$exists = array();
790
791	// get existing assignments ...
792	$sql_result = $this->db->query(
793	"SELECT contact_id FROM ".get_table_name($this->db_groupmembers).
794	" WHERE contactgroup_id=?".
795	" AND contact_id IN (".$this->db->array2list($ids, 'integer').")",
796	$group_id
797	);
798	while ($sql_result && ($sql_arr = $this->db->fetch_assoc($sql_result))) {
799	$exists[] = $sql_arr['contact_id'];
800	}
801	// ... and remove them from the list
802	$ids = array_diff($ids, $exists);
803
804	foreach ($ids as $contact_id) {
805	$this->db->query(
806	"INSERT INTO ".get_table_name($this->db_groupmembers).
807	" (contactgroup_id, contact_id, created)".
808	" VALUES (?, ?, ".$this->db->now().")",
809	$group_id,
810	$contact_id
811	);
812
813	if (!$this->db->db_error)
814	$added++;
815	}
816
817	return $added;
818	}
819
820
821	/**
822	* Remove the given contact records from a certain group
823	*
824	* @param string Group identifier
825	* @param array List of contact identifiers to be removed
826	* @return int Number of deleted group members
827	*/
828	function remove_from_group($group_id, $ids)
829	{
830	if (!is_array($ids))
831	$ids = explode(',', $ids);
832
833	$ids = $this->db->array2list($ids, 'integer');
834
835	$sql_result = $this->db->query(
836	"DELETE FROM ".get_table_name($this->db_groupmembers).
837	" WHERE contactgroup_id=?".
838	" AND contact_id IN ($ids)",
839	$group_id
840	);
841
842	return $this->db->affected_rows();
843	}
844
845
846	/**
847	* Check for existing groups with the same name
848	*
849	* @param string Name to check
850	* @return string A group name which is unique for the current use
851	*/
852	private function unique_groupname($name)
853	{
854	$checkname = $name;
855	$num = 2; $hit = false;
856
857	do {
858	$sql_result = $this->db->query(
859	"SELECT 1 FROM ".get_table_name($this->db_groups).
860	" WHERE del<>1".
861	" AND user_id=?".
862	" AND name=?",
863	$this->user_id,
864	$checkname);
865
866	// append number to make name unique
867	if ($hit = $this->db->num_rows($sql_result))
868	$checkname = $name . ' ' . $num++;
869	} while ($hit > 0);
870
871	return $checkname;
872	}
873
874	}

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