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<?php
/**
* SemanticScuttle - your social bookmark manager.
*
* PHP version 5.
*
* @category Bookmarking
* @package SemanticScuttle
* @author Benjamin Huynh-Kim-Bang <mensonge@users.sourceforge.net>
* @author Christian Weiske <cweiske@cweiske.de>
* @author Eric Dane <ericdane@users.sourceforge.net>
* @license GPL http://www.gnu.org/licenses/gpl.html
* @link http://sourceforge.net/projects/semanticscuttle
*/
/**
* SemanticScuttle common bookmark description service.
*
* @category Bookmarking
* @package SemanticScuttle
* @author Benjamin Huynh-Kim-Bang <mensonge@users.sourceforge.net>
* @author Christian Weiske <cweiske@cweiske.de>
* @author Eric Dane <ericdane@users.sourceforge.net>
* @license GPL http://www.gnu.org/licenses/gpl.html
* @link http://sourceforge.net/projects/semanticscuttle
*/
class SemanticScuttle_Service_CommonDescription extends SemanticScuttle_DbService
{
/**
* 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 = $GLOBALS['tableprefix'] .'commondescription';
}
function addTagDescription($tag, $desc, $uId, $time) {
$tag = self::getSortedTag($tag);
// Check if no modification
$lastDesc = $this->getLastTagDescription($tag);
if($lastDesc['cdDescription'] == $desc) {
return true;
}
// If modification
$datetime = gmdate('Y-m-d H:i:s', $time);
$values = array('tag'=>$tag, 'cdDescription'=>$desc, 'uId'=>$uId, 'cdDatetime'=>$datetime);
$sql = 'INSERT INTO '. $this->getTableName() .' '. $this->db->sql_build_array('INSERT', $values);
if (!($dbresult =& $this->db->sql_query($sql))) {
$this->db->sql_transaction('rollback');
message_die(GENERAL_ERROR, 'Could not add tag description', '', __LINE__, __FILE__, $sql, $this->db);
return false;
}
return true;
}
function getLastTagDescription($tag) {
$tag = self::getSortedTag($tag);
$query = "SELECT *";
$query.= " FROM `". $this->getTableName() ."`";
$query.= " WHERE tag='".$tag."'";
$query.= " ORDER BY cdDatetime DESC";
if (!($dbresult = & $this->db->sql_query_limit($query, 1, 0))) {
message_die(GENERAL_ERROR, 'Could not get tag description', '', __LINE__, __FILE__, $query, $this->db);
return false;
}
$row = $this->db->sql_fetchrow($dbresult);
$this->db->sql_freeresult($dbresult);
if ($row) {
return $row;
} else {
return false;
}
}
function getAllTagsDescription($tag) {
$query = "SELECT *";
$query.= " FROM `". $this->getTableName() ."`";
$query.= " WHERE tag='".$tag."'";
$query.= " ORDER BY cdDatetime DESC";
if (!($dbresult = & $this->db->sql_query($query))) {
message_die(GENERAL_ERROR, 'Could not get tag descriptions', '', __LINE__, __FILE__, $query, $this->db);
return false;
}
$res = $this->db->sql_fetchrowset($dbresult);
$this->db->sql_freeresult($dbresult);
return $res;
}
function getDescriptionById($cdId) {
$query = "SELECT *";
$query.= " FROM `". $this->getTableName() ."`";
$query.= " WHERE cdId='".$cdId."'";
if (!($dbresult = & $this->db->sql_query($query))) {
message_die(GENERAL_ERROR, 'Could not get tag descriptions', '', __LINE__, __FILE__, $query, $this->db);
return false;
}
if ($row =& $this->db->sql_fetchrow($dbresult)) {
$this->db->sql_freeresult($dbresult);
return $row;
} else {
return false;
}
}
function addBookmarkDescription($bHash, $title, $desc, $uId, $time) {
// Check if no modification
$lastDesc = $this->getLastBookmarkDescription($bHash);
if($lastDesc['cdTitle'] == $title && $lastDesc['cdDescription'] == $desc) {
return true;
}
// If modification
$datetime = gmdate('Y-m-d H:i:s', $time);
$values = array('bHash'=>$bHash, 'cdTitle'=>$title, 'cdDescription'=>$desc, 'uId'=>$uId, 'cdDatetime'=>$datetime);
$sql = 'INSERT INTO '. $this->getTableName() .' '. $this->db->sql_build_array('INSERT', $values);
if (!($dbresult =& $this->db->sql_query($sql))) {
$this->db->sql_transaction('rollback');
message_die(GENERAL_ERROR, 'Could not add bookmark description', '', __LINE__, __FILE__, $sql, $this->db);
return false;
}
return true;
}
function getLastBookmarkDescription($bHash) {
$query = "SELECT *";
$query.= " FROM `". $this->getTableName() ."`";
$query.= " WHERE bHash='".$bHash."'";
$query.= " ORDER BY cdDatetime DESC";
if (!($dbresult = & $this->db->sql_query_limit($query, 1, 0))) {
message_die(GENERAL_ERROR, 'Could not get bookmark description', '', __LINE__, __FILE__, $query, $this->db);
return false;
}
$row = $this->db->sql_fetchrow($dbresult);
$this->db->sql_freeresult($dbresult);
if ($row) {
return $row;
} else {
return false;
}
}
function getAllBookmarksDescription($bHash) {
$query = "SELECT *";
$query.= " FROM `". $this->getTableName() ."`";
$query.= " WHERE bHash='".$bHash."'";
$query.= " ORDER BY cdDatetime DESC";
if (!($dbresult = & $this->db->sql_query($query))) {
message_die(GENERAL_ERROR, 'Could not get bookmark descriptions', '', __LINE__, __FILE__, $query, $this->db);
return false;
}
$rowset = $this->db->sql_fetchrowset($dbresult);
$this->db->sql_freeresult($dbresult);
return $rowset;
}
function deleteDescriptionsForUser($uId){
$query = 'DELETE FROM '. $this->getTableName() . ' WHERE uId = '. intval($uId);
$this->db->sql_transaction('begin');
if (!($dbresult = & $this->db->sql_query($query))) {
$this->db->sql_transaction('rollback');
message_die(GENERAL_ERROR, 'Could not delete user descriptions', '',
__LINE__, __FILE__, $query, $this->db);
return false;
}
return true;
}
function deleteAll() {
$query = 'TRUNCATE TABLE `'. $this->getTableName() .'`';
$this->db->sql_query($query);
}
/**
* Sorts a tag combination.
*
* Multiple tags are separated by "+" signs. Semantically,
* tag combinations like "blue+flower" and "flower+blue" are identical.
* This method sorts the single tags so i.e. the common bookmark description
* of "blue+flower" is also shown for "flower+blue".
*
* @param string $tag Single tag or tag combination ("+")
*
* @return string Sorted tag combination
*/
protected static function getSortedTag($tag)
{
$tags = explode('+', $tag);
sort($tags);
return implode('+', $tags);
}
}
?>
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