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<?php
class SemanticScuttle_Service_SearchHistory extends SemanticScuttle_DbService
{
var $sizeSearchHistory;
/**
* Returns the single service instance
*
* @param DB $db Database object
*
* @return SemanticScuttle_Service
*/
public static function getInstance($db)
{
static $instance;
if (!isset($instance)) {
$instance = new self($db);
}
return $instance;
}
public function __construct($db)
{
$this->db = $db;
$this->tablename = $GLOBALS['tableprefix'] .'searchhistory';
if(isset($GLOBALS['sizeSearchHistory'])) {
$this->sizeSearchHistory = $GLOBALS['sizeSearchHistory'];
} else {
$this->sizeSearchHistory = 10;
}
}
function addSearch($terms, $range, $nbResults, $uId=0) {
if(strlen($terms) == 0) {
return false;
}
$datetime = gmdate('Y-m-d H:i:s', time());
//Insert values
$values = array('shTerms'=>$terms, 'shRange'=>$range, 'shDatetime'=>$datetime, 'shNbResults'=>$nbResults, 'uId'=>$uId);
$sql = 'INSERT INTO '. $this->getTableName() .' '. $this->db->sql_build_array('INSERT', $values);
$this->db->sql_transaction('begin');
if (!($dbresult = & $this->db->sql_query($sql))) {
$this->db->sql_transaction('rollback');
message_die(GENERAL_ERROR, 'Could not insert search history', '', __LINE__, __FILE__, $sql, $this->db);
return false;
}
if($this->sizeSearchHistory != -1 &&
$this->countSearches() > $this->sizeSearchHistory) {
$this->deleteOldestSearch();
}
}
function getAllSearches($range = NULL, $uId = NULL, $nb = NULL, $start = NULL, $distinct = false, $withResults = false) {
$sql = 'SELECT DISTINCT(shTerms), shId, shRange, shNbResults, shDatetime, uId';
$sql.= ' FROM '. $this->getTableName();
$sql.= ' WHERE 1=1';
if($range != NULL) {
$sql.= ' AND shRange = "'.$range.'"';
} else {
$sql.= ' AND shRange = "all"';
}
if($uId != NULL) {
$sql.= ' AND uId = '.$uId;
}
if($withResults = true) {
$sql.= ' AND shNbResults > 0';
}
if($distinct) {
$sql.= ' GROUP BY shTerms';
}
$sql.= ' ORDER BY shId DESC';
if (!($dbresult = & $this->db->sql_query_limit($sql, $nb, $start))) {
message_die(GENERAL_ERROR, 'Could not get searches', '', __LINE__, __FILE__, $sql, $this->db);
return false;
}
$searches = array();
while ($row = & $this->db->sql_fetchrow($dbresult)) {
$searches[] = $row;
}
$this->db->sql_freeresult($dbresult);
return $searches;
}
function countSearches() {
$sql = 'SELECT COUNT(*) AS `total` FROM '. $this->getTableName();
if (!($dbresult = & $this->db->sql_query($sql)) || (!($row = & $this->db->sql_fetchrow($dbresult)))) {
message_die(GENERAL_ERROR, 'Could not get total searches', '', __LINE__, __FILE__, $sql, $this->db);
return false;
}
$this->db->sql_freeresult($dbresult);
return $row['total'];
}
/* This function allows to limit the number of saved searches
by deleting the oldest one */
function deleteOldestSearch() {
$sql = 'DELETE FROM '.$this->getTableName();
$sql.= ' ORDER BY shId ASC LIMIT 1'; // warning: here the limit is important
$this->db->sql_transaction('begin');
if (!($dbresult = & $this->db->sql_query($sql))) {
$this->db->sql_transaction('rollback');
message_die(GENERAL_ERROR, 'Could not delete bookmarks', '', __LINE__, __FILE__, $query, $this->db);
return false;
}
}
function deleteSearchHistoryForUser($uId) {
$query = 'DELETE FROM '. $this->getTableName() .' WHERE uId = '. intval($uId);
if (!($dbresult = & $this->db->sql_query($query))) {
message_die(GENERAL_ERROR, 'Could not delete search history', '',
__LINE__, __FILE__, $query, $this->db);
return false;
}
return true;
}
function deleteAll() {
$query = 'TRUNCATE TABLE `'. $this->getTableName() .'`';
$this->db->sql_query($query);
}
}
?>
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