forked from ezsystems/eztags
/
eztags.php
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eztags.php
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<?php
/**
* eZTags class implements functions used by eztags datatype
*
*/
class eZTags
{
/**
* Contains IDs of the tags
*
* @var array $ParentArray
*/
private $IDArray = array();
/**
* Contains the keywords in the same order as IDs
*
* @var array $KeywordArray
*/
private $KeywordArray = array();
/**
* Contains parent IDs in same order as IDs
*
* @var array $ParentArray
*/
private $ParentArray = array();
/**
* Returns an array with attributes that are available
*
* @return array
*/
function attributes()
{
return array( 'tags',
'tag_ids',
'id_string',
'keyword_string',
'meta_keyword_string',
'parent_string' );
}
/**
* Returns true if the provided attribute exists
*
* @param string $name
* @return bool
*/
function hasAttribute( $name )
{
return in_array( $name, $this->attributes() );
}
/**
* Returns the specified attribute
*
* @param string $name
* @return mixed
*/
function attribute( $name )
{
switch ( $name )
{
case 'tags' :
{
return $this->tags();
} break;
case 'tag_ids' :
{
return $this->IDArray;
} break;
case 'id_string' :
{
return $this->idString();
} break;
case 'keyword_string' :
{
return $this->keywordString();
} break;
case 'meta_keyword_string' :
{
return $this->keywordString( ", " );
} break;
case 'parent_string' :
{
return $this->parentString();
} break;
default:
{
eZDebug::writeError( "Attribute '$name' does not exist", "eZTags::attribute" );
return null;
} break;
}
}
/**
* Initializes the tags
*
* @param string $idString
* @param string $keywordString
* @param string $parentString
*/
function createFromStrings( $idString, $keywordString, $parentString )
{
$idArray = explode( '|#', $idString );
$keywordArray = explode( '|#', $keywordString );
$parentArray = explode( '|#', $parentString );
$wordArray = array();
foreach ( array_keys( $idArray ) as $key )
{
$wordArray[] = trim( $idArray[$key] ) . "|#" . trim( $keywordArray[$key] ) . "|#" . trim( $parentArray[$key] );
}
$wordArray = array_unique( $wordArray );
foreach ( $wordArray as $wordKey )
{
$word = explode( '|#', $wordKey );
if ($word[0] != '')
{
$this->IDArray[] = (int) $word[0];
$this->KeywordArray[] = $word[1];
$this->ParentArray[] = (int) $word[2];
}
}
}
/**
* Fetches the tags for the given attribute
*
* @param eZContentObjectAttribute $attribute
*/
function createFromAttribute( $attribute )
{
if ( !( $attribute instanceof eZContentObjectAttribute && is_numeric( $attribute->attribute( 'id' ) ) ) )
{
return;
}
$classAttribute = $attribute->contentClassAttribute();
$maxTags = (int) $classAttribute->attribute( eZTagsType::MAX_TAGS_FIELD );
if ( $maxTags > 0 && count( $this->IDArray ) > $maxTags )
{
$this->IDArray = array_slice( $this->IDArray, 0, $maxTags );
$this->KeywordArray = array_slice( $this->KeywordArray, 0, $maxTags );
$this->ParentArray = array_slice( $this->ParentArray, 0, $maxTags );
}
/* Selects all tags and sorts by priority */
$db = eZDB::instance();
$words = $db->arrayQuery( "SELECT eztags.id, eztags.keyword, eztags_attribute_link.priority, eztags.parent_id FROM eztags_attribute_link, eztags
WHERE eztags_attribute_link.keyword_id = eztags.id AND
eztags_attribute_link.objectattribute_id = " . $attribute->attribute( 'id' ) . " AND
eztags_attribute_link.objectattribute_version = " . $attribute->attribute( 'version' ) .
" ORDER BY eztags_attribute_link.priority ASC" );
$wordArray = array();
foreach ( $words as $w )
{
$wordArray[] = trim( $w['id'] ) . "|#" . trim( $w['keyword'] ) . "|#" . trim( $w['parent_id'] );
}
$wordArray = array_unique( $wordArray );
foreach ( $wordArray as $wordKey )
{
$word = explode( '|#', $wordKey );
if ($word[0] != '')
{
$this->IDArray[] = (int) $word[0];
$this->KeywordArray[] = $word[1];
$this->ParentArray[] = (int) $word[2];
}
}
}
/**
* Stores the tags to database
*
* @param eZContentObjectAttribute $attribute
*/
function store( $attribute )
{
if ( !( $attribute instanceof eZContentObjectAttribute && is_numeric( $attribute->attribute( 'id' ) ) ) )
{
return;
}
$attributeID = $attribute->attribute( 'id' );
$attributeVersion = $attribute->attribute( 'version' );
$objectID = $attribute->attribute( 'contentobject_id' );
$db = eZDB::instance();
$currentTime = time();
//get existing tags for object attribute sorting by priority
$existingTagIDs = array();
$existingTags = $db->arrayQuery( "SELECT DISTINCT keyword_id, priority FROM eztags_attribute_link WHERE objectattribute_id = $attributeID AND objectattribute_version = $attributeVersion ORDER BY priority, keyword_id ASC" );
if ( is_array($existingTags ) )
{
foreach ( $existingTags as $t )
{
$existingTagIDs[] = (int) $t['keyword_id'];
}
}
//get tags to delete from object attribute
$tagsToDelete = array();
$tempIDArray = array();
// if for some reason already existing tags are added with ID = 0 with fromString
// check to see if they really exist, so we don't delete them by mistake
foreach ( array_keys( $this->IDArray ) as $key )
{
if ( $this->IDArray[$key] == 0 )
{
$existing = eZTagsObject::fetchList( array( 'keyword' => array( 'like', trim( $this->KeywordArray[$key] ) ), 'parent_id' => $this->ParentArray[$key] ) );
if ( is_array( $existing ) && !empty( $existing ) )
$tempIDArray[] = $existing[0]->attribute( 'id' );
}
else
{
$tempIDArray[] = $this->IDArray[$key];
}
}
foreach ( $existingTagIDs as $tid )
{
if ( !in_array( $tid, $tempIDArray ) )
{
$tagsToDelete[] = $tid;
}
}
//and delete them
if ( !empty( $tagsToDelete ) )
{
$dbString = $db->generateSQLINStatement( $tagsToDelete, 'keyword_id', false, true, 'int' );
$db->query( "DELETE FROM eztags_attribute_link WHERE $dbString AND eztags_attribute_link.objectattribute_id = $attributeID AND eztags_attribute_link.objectattribute_version = $attributeVersion" );
}
//get tags that are new to the object attribute
$newTags = array();
$tagsToLink = array();
foreach ( array_keys( $this->IDArray ) as $key )
{
if ( !in_array( $this->IDArray[$key], $existingTagIDs ) )
{
if ( $this->IDArray[$key] == 0 )
{
// We won't allow adding tags to the database that already exist, but instead, we link to the existing tags
$existing = eZTagsObject::fetchList( array( 'keyword' => array( 'like', trim( $this->KeywordArray[$key] ) ), 'parent_id' => $this->ParentArray[$key] ) );
if ( is_array( $existing ) && !empty( $existing ) )
{
if ( !in_array( $existing[0]->attribute( 'id' ), $existingTagIDs ) )
$tagsToLink[] = $existing[0]->attribute( 'id' );
}
else
{
$newTags[] = array( 'id' => $this->IDArray[$key], 'keyword' => $this->KeywordArray[$key], 'parent_id' => $this->ParentArray[$key] );
}
}
else
$tagsToLink[] = $this->IDArray[$key];
}
}
//we need to check if user really has access to tags/add, taking into account policy and subtree limits
$attributeSubTreeLimit = $attribute->contentClassAttribute()->attribute( eZTagsType::SUBTREE_LIMIT_FIELD );
$userLimitations = eZTagsTemplateFunctions::getSimplifiedUserAccess('tags', 'add');
if ( $userLimitations['accessWord'] != 'no' && !empty( $newTags ) )
{
//first we need to fetch all locations user has access to
$userLimitations = isset( $userLimitations['simplifiedLimitations']['Tag'] ) ? $userLimitations['simplifiedLimitations']['Tag'] : array();
$allowedLocations = self::getAllowedLocations( $attributeSubTreeLimit, $userLimitations );
foreach ( $newTags as $t )
{
//and then for each tag check if user can save in one of the allowed locations
$parentTag = eZTagsObject::fetch( $t['parent_id'] );
$pathString = ( $parentTag instanceof eZTagsObject ) ? $parentTag->attribute( 'path_string' ) : '/';
$depth = ( $parentTag instanceof eZTagsObject ) ? (int) $parentTag->attribute( 'depth' ) + 1 : 1;
if ( self::canSave( $pathString, $allowedLocations ) )
{
$db->query( "INSERT INTO eztags ( parent_id, main_tag_id, keyword, depth, path_string, modified, remote_id ) VALUES ( " .
$t['parent_id'] . ", 0, '" . $db->escapeString( trim( $t['keyword'] ) ) . "', $depth, '$pathString', 0, '" . eZTagsObject::generateRemoteID() . "' )" );
$tagID = (int) $db->lastSerialID( 'eztags', 'id' );
$db->query( "UPDATE eztags SET path_string = CONCAT(path_string, CAST($tagID AS CHAR), '/') WHERE id = $tagID" );
$pathArray = explode( '/', trim( $pathString, '/' ) );
array_push( $pathArray, $tagID );
$db->query( "UPDATE eztags SET modified = $currentTime WHERE " . $db->generateSQLINStatement( $pathArray, 'id', false, true, 'int' ) );
$tagsToLink[] = $tagID;
if ( class_exists( 'ezpEvent', false ) )
ezpEvent::getInstance()->filter( 'tag/add', array( 'tag' => eZTagsObject::fetch( $tagID ), 'parentTag' => $parentTag ) );
}
}
}
//link tags to objects taking into account subtree limit
if ( !empty( $tagsToLink ) )
{
$dbString = $db->generateSQLINStatement( $tagsToLink, 'id', false, true, 'int' );
$tagsToLink = $db->arrayQuery( "SELECT id, path_string FROM eztags WHERE $dbString" );
if ( is_array( $tagsToLink ) && !empty( $tagsToLink ) )
{
foreach ( $tagsToLink as $t )
{
if ( $attributeSubTreeLimit == 0 || ( $attributeSubTreeLimit > 0 &&
strpos( $t['path_string'], '/' . $attributeSubTreeLimit . '/' ) !== false ) )
{
$db->query( "INSERT INTO eztags_attribute_link ( keyword_id, objectattribute_id, objectattribute_version, object_id ) VALUES ( " . $t['id'] . ", $attributeID, $attributeVersion, $objectID )" );
}
}
}
}
/* After everything is done, we update each tag priority */
foreach ( $this->IDArray as $priority => $tagId )
{
$db->query( "UPDATE eztags_attribute_link
SET priority = " . (int) $priority . "
WHERE keyword_id = " . (int) $tagId . "
AND objectattribute_id = " . (int) $attributeID . "
AND objectattribute_version = " .$attributeVersion );
}
}
/**
* Returns all allowed locations user has access to
*
* @static
* @param int $attributeSubTreeLimit
* @param array $userLimitations
* @return bool
*/
private static function getAllowedLocations( $attributeSubTreeLimit, $userLimitations )
{
if ( empty( $userLimitations ) )
return array( (string) $attributeSubTreeLimit );
else
{
if ( $attributeSubTreeLimit == 0 )
return $userLimitations;
else
{
$limitTag = eZTagsObject::fetch( $attributeSubTreeLimit );
$pathString = ( $limitTag instanceof eZTagsObject ) ? $limitTag->attribute( 'path_string' ) : '/';
foreach ( $userLimitations as $l )
{
if ( strpos( $pathString, '/' . $l . '/' ) !== false )
return array( (string) $attributeSubTreeLimit );
}
}
}
return array();
}
/**
* Checks if tag (described by its path string) can be saved
* to one of the allowed locations
*
* @static
* @param string $pathString
* @param array $userLimitations
* @return bool
*/
private static function canSave( $pathString, $allowedLocations )
{
if ( !empty( $allowedLocations ) )
{
if ( $allowedLocations[0] == 0 )
{
return true;
}
else
{
foreach ( $allowedLocations as $l )
{
if ( strpos( $pathString, '/' . $l . '/' ) !== false )
{
return true;
}
}
}
}
return false;
}
/**
* Returns tags within this instance sorted by priority
*
* @return array
*/
function tags()
{
if ( !is_array( $this->IDArray ) || empty( $this->IDArray ) )
{
return array();
}
$tags = array();
foreach( eZTagsObject::fetchList( array( 'id' => array( $this->IDArray ) ) ) as $item )
{
$tags[array_search( $item->attribute('id'), $this->IDArray )] = $item;
}
ksort( $tags );
return $tags;
}
/**
* Returns the tags ID array
*
* @return array
*/
function idArray()
{
return $this->IDArray;
}
/**
* Returns the IDs as a string
*
* @return string
*/
function idString()
{
return implode( '|#', $this->IDArray );
}
/**
* Returns the keywords as a string
*
* @return string
*/
function keywordString( $separator = '|#' )
{
return implode( $separator, $this->KeywordArray );
}
/**
* Returns the parent IDs as a string
*
* @return string
*/
function parentString()
{
return implode( '|#', $this->ParentArray );
}
}
?>