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<?php
class TagService {
var $db;
var $tablename;
function &getInstance(&$db) {
static $instance;
if (!isset($instance))
$instance =& new TagService($db);
return $instance;
}
function TagService(&$db) {
$this->db =& $db;
$this->tablename = $GLOBALS['tableprefix'] .'tags';
}
function getDescription($tag, $uId) {
$query = 'SELECT tag, uId, tDescription';
$query.= ' FROM '.$this->getTableName();
$query.= ' WHERE tag = "'.$tag.'"';
$query.= ' AND uId = "'.$uId.'"';
if (!($dbresult = & $this->db->sql_query($query))) {
message_die(GENERAL_ERROR, 'Could not get tag description', '', __LINE__, __FILE__, $query, $this->db);
return false;
}
if ($row =& $this->db->sql_fetchrow($dbresult)) {
return $row;
} else {
return array('tDescription'=>'');
}
}
function existsDescription($tag, $uId) {
$query = 'SELECT tag, uId, tDescription';
$query.= ' FROM '.$this->getTableName();
$query.= ' WHERE tag = "'.$tag.'"';
$query.= ' AND uId = "'.$uId.'"';
if (!($dbresult = & $this->db->sql_query($query))) {
message_die(GENERAL_ERROR, 'Could not get tag description', '', __LINE__, __FILE__, $query, $this->db);
return false;
}
if ($row =& $this->db->sql_fetchrow($dbresult)) {
return true;
} else {
return false;
}
}
function getAllDescriptions($tag) {
$query = 'SELECT tag, uId, tDescription';
$query.= ' FROM '.$this->getTableName();
$query.= ' WHERE tag = "'.$tag.'"';
if (!($dbresult = & $this->db->sql_query($query))) {
message_die(GENERAL_ERROR, 'Could not get tag description', '', __LINE__, __FILE__, $query, $this->db);
return false;
}
return $this->db->sql_fetchrowset($dbresult);
}
function updateDescription($tag, $uId, $desc) {
if($this->existsDescription($tag, $uId)) {
$query = 'UPDATE '.$this->getTableName();
$query.= ' SET tDescription="'.$this->db->sql_escape($desc).'"';
$query.= ' WHERE tag="'.$tag.'" AND uId="'.$uId.'"';
} else {
$values = array('tag'=>$tag, 'uId'=>$uId, 'tDescription'=>$desc);
$query = 'INSERT INTO '. $this->getTableName() .' '. $this->db->sql_build_array('INSERT', $values);
}
$this->db->sql_transaction('begin');
if (!($dbresult = & $this->db->sql_query($query))) {
$this->db->sql_transaction('rollback');
message_die(GENERAL_ERROR, 'Could not delete bookmarks', '', __LINE__, __FILE__, $query, $this->db);
return false;
}
$this->db->sql_transaction('commit');
return true;
}
function renameTag($uId, $oldName, $newName) {
$newname = $this->normalize($newname);
$query = 'UPDATE `'. $this->getTableName() .'`';
$query.= ' SET tag="'.$newName.'"';
$query.= ' WHERE tag="'.$oldName.'"';
$query.= ' AND uId="'.$uId.'"';
$this->db->sql_query($query);
return true;
}
/* normalize the input tags which could be a string or an array*/
function normalize($tags) {
//clean tags from strange characters
$tags = str_replace(array('"', '\'', '/'), "_", $tags);
//normalize
if(!is_array($tags)) {
$tags = strtolower(trim($tags));
} else {
for($i=0; $i<count($tags); $i++) {
$tags[$i] = strtolower(trim($tags[$i]));
}
}
return $tags;
}
function deleteAll() {
$query = 'TRUNCATE TABLE `'. $this->getTableName() .'`';
$this->db->sql_query($query);
}
// Properties
function getTableName() { return $this->tablename; }
function setTableName($value) { $this->tablename = $value; }
}
?>
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