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authorcweiske <cweiske@b3834d28-1941-0410-a4f8-b48e95affb8f>2009-10-03 14:00:33 +0000
committercweiske <cweiske@b3834d28-1941-0410-a4f8-b48e95affb8f>2009-10-03 14:00:33 +0000
commit29422fa55379aa61a61019b832c83dab6d450264 (patch)
treee5884ce6fed2cf1d02165a1b5667b99cd80262e5 /services/tagcacheservice.php
parentb8b1d06b2d899658fae64d0de506439ca0ea067c (diff)
downloadsemanticscuttle-29422fa55379aa61a61019b832c83dab6d450264.tar.gz
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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.php349
1 files changed, 0 insertions, 349 deletions
diff --git a/services/tagcacheservice.php b/services/tagcacheservice.php
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--- a/services/tagcacheservice.php
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@@ -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; }
-}
-?>