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author | 2009-10-03 14:00:33 +0000 | |
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committer | 2009-10-03 14:00:33 +0000 | |
commit | 29422fa55379aa61a61019b832c83dab6d450264 (patch) | |
tree | e5884ce6fed2cf1d02165a1b5667b99cd80262e5 /services/tagcacheservice.php | |
parent | b8b1d06b2d899658fae64d0de506439ca0ea067c (diff) | |
download | scuttle-29422fa55379aa61a61019b832c83dab6d450264.tar.gz scuttle-29422fa55379aa61a61019b832c83dab6d450264.zip |
move files to new locations
git-svn-id: https://semanticscuttle.svn.sourceforge.net/svnroot/semanticscuttle/trunk@386 b3834d28-1941-0410-a4f8-b48e95affb8f
Diffstat (limited to 'services/tagcacheservice.php')
-rw-r--r-- | services/tagcacheservice.php | 349 |
1 files changed, 0 insertions, 349 deletions
diff --git a/services/tagcacheservice.php b/services/tagcacheservice.php deleted file mode 100644 index ed2eefc..0000000 --- a/services/tagcacheservice.php +++ /dev/null @@ -1,349 +0,0 @@ -<?php - -/* - * This class infers on relation between tags by storing all the including tags or synonymous tag. - * For example, if the user creates: tag1>tag2>tag3, the system can infer that tag is included into tag1. - * Instead of computing this relation several times, it is saved into this current table. - * For synonymy, this table stores also the group of synonymous tags. - * The table must be updated for each modification of the relations between tags. - */ - -class TagCacheService { - var $db; - var $tablename; - - function &getInstance(&$db) { - static $instance; - if (!isset($instance)) - $instance =& new TagCacheService($db); - return $instance; - } - - function TagCacheService(&$db) { - $this->db =& $db; - $this->tablename = $GLOBALS['tableprefix'] .'tagscache'; - } - - function getChildren($tag1, $uId) { - $tagservice =& ServiceFactory::getServiceInstance('TagService'); - $tag1 = $tagservice->normalize($tag1); - - if($tag1 == '') return false; - - $query = "SELECT DISTINCT tag2 as 'tag'"; - $query.= " FROM `". $this->getTableName() ."`"; - $query.= " WHERE relationType = '>'"; - $query.= " AND tag1 = '".$tag1."'"; - $query.= " AND uId = '".$uId."'"; - - //die($query); - if (! ($dbresult =& $this->db->sql_query($query)) ){ - message_die(GENERAL_ERROR, 'Could not get related tags', '', __LINE__, __FILE__, $query, $this->db); - return false; - } - - - $rowset = $this->db->sql_fetchrowset($dbresult); - $output = array(); - foreach($rowset as $row) { - $output[] = $row['tag']; - } - - $this->db->sql_freeresult($dbresult); - return $output; - } - - function addChild($tag1, $tag2, $uId) { - $tagservice =& ServiceFactory::getServiceInstance('TagService'); - $tag1 = $tagservice->normalize($tag1); - $tag2 = $tagservice->normalize($tag2); - - if($tag1 == $tag2 || strlen($tag1) == 0 || strlen($tag2) == 0 - || ($this->existsChild($tag1, $tag2, $uId))) { - return false; - } - - $values = array('tag1' => $tag1, 'tag2' => $tag2, 'relationType'=> '>', 'uId'=> $uId); - $query = 'INSERT INTO '. $this->getTableName() .' '. $this->db->sql_build_array('INSERT', $values); - //die($query); - if (!($dbresult =& $this->db->sql_query($query))) { - $this->db->sql_transaction('rollback'); - message_die(GENERAL_ERROR, 'Could not add tag cache inference', '', __LINE__, __FILE__, $query, $this->db); - return false; - } - $this->db->sql_transaction('commit'); - } - - function removeChild($tag1, $tag2, $uId) { - if(($tag1 != '' && $tag1 == $tag2) || - ($tag1 == '' && $tag2 == '' && $uId == '')) { - return false; - } - - $query = 'DELETE FROM '. $this->getTableName(); - $query.= ' WHERE 1=1'; - $query.= strlen($tag1)>0 ? ' AND tag1 = "'. $tag1 .'"' : ''; - $query.= strlen($tag2)>0 ? ' AND tag2 = "'. $tag2 .'"' : ''; - $query.= ' AND relationType = ">"'; - $query.= strlen($uId)>0 ? ' AND uId = "'. $uId .'"' : ''; - - if (!($dbresult =& $this->db->sql_query($query))) { - message_die(GENERAL_ERROR, 'Could not remove tag cache inference', '', __LINE__, __FILE__, $query, $this->db); - return false; - } - } - - function removeChildren($tag1, $uId) { - $this->removeChild($tag1, NULL, $uId); - } - - function existsChild($tag1, $tag2, $uId) { - $tagservice =& ServiceFactory::getServiceInstance('TagService'); - $tag1 = $tagservice->normalize($tag1); - $tag2 = $tagservice->normalize($tag2); - - $query = "SELECT tag1, tag2, relationType, uId FROM `". $this->getTableName() ."`"; - $query.= " WHERE tag1 = '" .$tag1 ."'"; - $query.= " AND tag2 = '".$tag2."'"; - $query.= " AND relationType = '>'"; - $query.= " AND uId = '".$uId."'"; - - //echo($query."<br>\n"); - - return $this->db->sql_numrows($this->db->sql_query($query)) > 0; - - } - - /* - * Synonyms of a same concept are a group. A group has one main synonym called key - * and a list of synonyms called values. - */ - function addSynonym($tag1, $tag2, $uId) { - - if($tag1 == $tag2 || strlen($tag1) == 0 || strlen($tag2) == 0 - || ($this->existsSynonym($tag1, $tag2, $uId))) { - return false; - } - - $case1 = '0'; // not in DB - if($this->_isSynonymKey($tag1, $uId)) { - $case1 = 'key'; - } elseif($this->_isSynonymValue($tag1, $uId)) { - $case1 = 'value'; - } - - $case2 = '0'; // not in DB - if($this->_isSynonymKey($tag2, $uId)) { - $case2 = 'key'; - } elseif($this->_isSynonymValue($tag2, $uId)) { - $case2 = 'value'; - } - $case = $case1.$case2; - - // all the possible cases - switch ($case) { - case 'keykey': - $values = $this->_getSynonymValues($tag2, $uId); - $this->removeSynonymGroup($tag2, $uId); - foreach($values as $value) { - $this->addSynonym($tag1, $value['tag'], $uId); - } - $this->addSynonym($tag1, $tag2, $uId); - break; - - case 'valuekey': - $key = $this->_getSynonymKey($tag1, $uId); - $this->addSynonym($key, $tag2, $uId); - break; - - case 'keyvalue': - $this->addSynonym($tag2, $tag1, $uId); - break; - case 'valuevalue': - $key1 = $this->_getSynonymKey($tag1, $uId); - $key2 = $this->_getSynonymKey($tag2, $uId); - $this->addSynonym($key1, $key2, $uId); - break; - case '0value': - $key = $this->_getSynonymKey($tag2, $uId); - $this->addSynonym($key, $tag1, $uId); - break; - case 'value0': - $this->addSynonym($tag2, $tag1, $uId); - break; - case '0key': - $this->addSynonym($tag2, $tag1, $uId); - break; - default: - $values = array('tag1' => $tag1, 'tag2' => $tag2, 'relationType'=> '=', 'uId'=> $uId); - $query = 'INSERT INTO '. $this->getTableName() .' '. $this->db->sql_build_array('INSERT', $values); - //die($query); - if (!($dbresult =& $this->db->sql_query($query))) { - $this->db->sql_transaction('rollback'); - message_die(GENERAL_ERROR, 'Could not add tag cache synonymy', '', __LINE__, __FILE__, $query, $this->db); - return false; - } - $this->db->sql_transaction('commit'); - break; - } - } - - function removeSynonymGroup($tag1, $uId) { - $query = 'DELETE FROM '. $this->getTableName(); - $query.= ' WHERE 1=1'; - $query.= ' AND tag1 = "'. $tag1 .'"'; - $query.= ' AND relationType = "="'; - $query.= ' AND uId = "'. $uId .'"'; - - if (!($dbresult =& $this->db->sql_query($query))) { - message_die(GENERAL_ERROR, 'Could not remove tag cache inference', '', __LINE__, __FILE__, $query, $this->db); - return false; - } - } - - function _isSynonymKey($tag1, $uId) { - $tagservice =& ServiceFactory::getServiceInstance('TagService'); - $tag1 = $tagservice->normalize($tag1); - - $query = "SELECT tag1 FROM `". $this->getTableName() ."`"; - $query.= " WHERE tag1 = '" .$tag1 ."'"; - $query.= " AND relationType = '='"; - $query.= " AND uId = '".$uId."'"; - - return $this->db->sql_numrows($this->db->sql_query($query)) > 0; - } - - function _isSynonymValue($tag2, $uId) { - $tagservice =& ServiceFactory::getServiceInstance('TagService'); - $tag2 = $tagservice->normalize($tag2); - - $query = "SELECT tag2 FROM `". $this->getTableName() ."`"; - $query.= " WHERE tag2 = '" .$tag2 ."'"; - $query.= " AND relationType = '='"; - $query.= " AND uId = '".$uId."'"; - - return $this->db->sql_numrows($this->db->sql_query($query)) > 0; - } - - function getSynonyms($tag1, $uId) { - $values = array(); - if($this->_isSynonymKey($tag1, $uId)) { - $values = $this->_getSynonymValues($tag1, $uId); - } elseif($this->_isSynonymValue($tag1, $uId)) { - $key = $this->_getSynonymKey($tag1, $uId); - $values = $this->_getSynonymValues($key, $uId, $tag1); - $values[] = $key; - } - return $values; - } - - function _getSynonymKey($tag2, $uId) { - $tagservice =& ServiceFactory::getServiceInstance('TagService'); - $tag2 = $tagservice->normalize($tag2); - - if($this->_isSynonymKey($tag2)) return $tag2; - - if($tag2 == '') return false; - - $query = "SELECT DISTINCT tag1 as 'tag'"; - $query.= " FROM `". $this->getTableName() ."`"; - $query.= " WHERE relationType = '='"; - $query.= " AND tag2 = '".$tag2."'"; - $query.= " AND uId = '".$uId."'"; - - //die($query); - if (! ($dbresult =& $this->db->sql_query($query)) ){ - message_die(GENERAL_ERROR, 'Could not get related tags', '', __LINE__, __FILE__, $query, $this->db); - return false; - } - - $row = $this->db->sql_fetchrow($dbresult); - $this->db->sql_freeresult($dbresult); - return $row['tag']; - } - - /* - * Return values associated with a key. - * $tagExcepted allows to hide a value. - */ - function _getSynonymValues($tag1, $uId, $tagExcepted = NULL) { - $tagservice =& ServiceFactory::getServiceInstance('TagService'); - $tag1 = $tagservice->normalize($tag1); - $tagExcepted = $tagservice->normalize($tagExcepted); - - if($tag1 == '') return false; - - $query = "SELECT DISTINCT tag2 as 'tag'"; - $query.= " FROM `". $this->getTableName() ."`"; - $query.= " WHERE relationType = '='"; - $query.= " AND tag1 = '".$tag1."'"; - $query.= " AND uId = '".$uId."'"; - $query.= $tagExcepted!=''?" AND tag2!='".$tagExcepted."'":""; - - if (! ($dbresult =& $this->db->sql_query($query)) ){ - message_die(GENERAL_ERROR, 'Could not get related tags', '', __LINE__, __FILE__, $query, $this->db); - return false; - } - - $rowset = $this->db->sql_fetchrowset($dbresult); - - $output = array(); - foreach($rowset as $row) { - $output[] = $row['tag']; - } - - $this->db->sql_freeresult($dbresult); - return $output; - } - - function existsSynonym($tag1, $tag2, $uId) { - if($this->_getSynonymKey($tag1, $uId) == $tag2 || $this->_getSynonymKey($tag2, $uId) == $tag1) { - return true; - } else { - return false; - } - } - - - function updateTag($tag1, $relationType, $otherTags, $uId) { - if($relationType == '=') { - if($this->getSynonyms($tag1, $uId)) { // remove previous data avoiding unconstistency - $this->removeSynonymGroup($tag1, $uId); - } - - foreach($otherTags as $tag2) { - $this->addSynonym($tag1, $tag2, $uId); - } - } elseif($relationType == '>') { - if(count($this->getChildren($tag1, $uId))>0) { // remove previous data avoiding unconstistency - $this->removeChildren($tag1); - } - - foreach($otherTags as $tag2) { - $this->addChild($tag1, $tag2, $uId); - } - } - } - - function deleteByUser($uId) { - $query = 'DELETE FROM '. $this->getTableName() .' WHERE uId = '. intval($uId); - - if (!($dbresult = & $this->db->sql_query($query))) { - message_die(GENERAL_ERROR, 'Could not delete user tags cache', '', __LINE__, __FILE__, $query, $this->db); - return false; - } - - return true; - - } - - function deleteAll() { - $query = 'TRUNCATE TABLE `'. $this->getTableName() .'`'; - $this->db->sql_query($query); - } - - // Properties - function getTableName() { return $this->tablename; } - function setTableName($value) { $this->tablename = $value; } -} -?> |