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<?php
/*
** Zabbix
** Copyright (C) 2001-2019 Zabbix SIA
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2 of the License, or
** (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
**/
/**
* Container class for favorite value management.
* Uses caching.
*/
class CFavorite {
/**
* Cache for favorite values.
*
* $cache[idx][]['value']
* $cache[idx][]['source']
*/
private static $cache = null;
/**
* Returns favorite values from db. Uses caching for performance.
*
* @param string $idx identifier of favorite value group
*
* @return array list of favorite values corresponding to $idx
*/
public static function get($idx) {
// return values if cached
if (isset(self::$cache[$idx])) {
return self::$cache[$idx];
}
$result = [];
$db_profiles = DBselect(
'SELECT p.value_id,p.source'.
' FROM profiles p'.
' WHERE p.userid='.CWebUser::$data['userid'].
' AND p.idx='.zbx_dbstr($idx).
' ORDER BY p.profileid'
);
while ($profile = DBfetch($db_profiles)) {
$result[] = ['value' => $profile['value_id'], 'source' => $profile['source']];
}
// store db values in cache
self::$cache[$idx] = $result;
return $result;
}
/**
* Adds favorite value to DB.
*
* @param string $idx identifier of favorite value group
* @param int $favid value id
* @param string $favobj source object
*
* @return bool did SQL INSERT succeeded
*/
public static function add($idx, $favid, $favobj = null) {
if (self::exists($idx, $favid, $favobj)) {
return true;
}
// add to cache only if cache is created
if (isset(self::$cache[$idx])) {
self::$cache[$idx][] = [
'value' => $favid,
'source' => $favobj
];
}
$values = [
'profileid' => get_dbid('profiles', 'profileid'),
'userid' => CWebUser::$data['userid'],
'idx' => zbx_dbstr($idx),
'value_id' => zbx_dbstr($favid),
'type' => PROFILE_TYPE_ID
];
if (!is_null($favobj)) {
$values['source'] = zbx_dbstr($favobj);
}
return DBexecute(
'INSERT INTO profiles ('.implode(', ', array_keys($values)).')'.
' VALUES ('.implode(', ', $values).')'
);
}
/**
* Removes favorite from DB. Clears cache by $idx.
*
* @param string $idx identifier of favorite value group
* @param int $favid value id
* @param string $favobj source object
*
* @return boolean did SQL DELETE succeeded
*/
public static function remove($idx, $favid = 0, $favobj = null) {
// empty cache, we know that all $idx values will be removed in DELETE
if ($favid == 0 && $favobj === null) {
self::$cache[$idx] = [];
}
// remove from cache, cache will be rebuilt upon get()
else {
self::$cache[$idx] = null;
}
return DBexecute(
'DELETE FROM profiles'.
' WHERE userid='.CWebUser::$data['userid'].
' AND idx='.zbx_dbstr($idx).
($favid > 0 ? ' AND value_id='.zbx_dbstr($favid) : '').
(is_null($favobj) ? '' : ' AND source='.zbx_dbstr($favobj))
);
}
/**
* Checks whether favorite value exists.
*
* @param string $idx identifier of favorite value group
* @param int $favid value id
* @param string $favobj source object
*
* @return boolean
*/
public static function exists($idx, $favid, $favobj = null) {
$favorites = self::get($idx);
foreach ($favorites as $favorite) {
if (idcmp($favid, $favorite['value']) && $favorite['source'] == $favobj) {
return true;
}
}
return false;
}
}
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