Inheritance diagram for ilSearchResult:

Collaboration diagram for ilSearchResult:

Public Member Functions
	ilSearchResult ($a_user_id=0)
	Constructor public. More...

	setRequiredPermission ($a_permission)
	Set the required permission for the rbac checks in function 'filter()'. More...

	getRequiredPermission ()

	setUserId ($a_user_id)

	getUserId ()

	getEntries ()

	isLimitReached ()

	setMaxHits ($a_max_hits)

	getMaxHits ()

	isOffsetReached ($a_counter)
	Check if offset is reached. More...

	addEntry ($a_obj_id, $a_type, $found, $a_child_id=0)
	add search result entry Entries are stored with 'obj_id'. More...

	numEntries ()
	Check number of entries public. More...

	mergeEntries (&$result_obj)
	merge entries of this instance and another result object More...

	diffEntriesFromResult (&$result_obj)
	diff entries of this instance and another result object Used for search in results More...

	intersectEntries (&$result_obj)
	Build intersection of entries (all entries that are present in both result sets) More...

	addResult ($a_ref_id, $a_obj_id, $a_type)
	add search result Results are stored with 'ref_id'. More...

	getResults ()

	getResultIds ()
	get result ids More...

	getResultsByObjId ()

	getUniqueResults ()
	Get unique results. More...

	getResultsForPresentation ()

	getSubitemIds ()

	filter ($a_root_node, $check_and)
	Filter search result. More...

	filterResults ($a_root_node)
	Filter search area of result set public. More...

	save ($a_type=DEFAULT_SEARCH)
	Save search results. More...

	read ($a_type=DEFAULT_SEARCH)
	read search results More...

	__updateEntryChilds ($a_obj_id, $a_childs)
	Update childs for a specific entry. More...

	__updateResultChilds ($a_ref_id, $a_childs)
	Update childs for a specific result. More...

	__initSearchSettingsObject ()

	preventOverwritingMaxhits ($a_flag=null)
	If you call this function and pass "true" the maxhits setting will not be overwritten in __initSearchSettingsObject() More...

	addObserver (&$a_class, $a_method)
	The observer is used to call functions for filtering result. More...

	callListeners ($a_ref_id, &$a_data)

Data Fields
	$permission = 'visible'

	$user_id

	$entries = array()

	$results = array()

	$observers = array()

	$ilias

	$ilAccess

	$limit_reached = false

	$result

Protected Member Functions
	initUserSearchCache ()
	Init user search cache. More...

Protected Attributes
	$search_cache = null

	$offset = 0

	$preventOverwritingMaxhits = false

Detailed Description

Definition at line 42 of file class.ilSearchResult.php.

Member Function Documentation

◆ __initSearchSettingsObject()

ilSearchResult::__initSearchSettingsObject ( )

Definition at line 553 of file class.ilSearchResult.php.

References preventOverwritingMaxhits(), and setMaxHits().

Referenced by ilSearchResult().

         {
                 include_once 'Services/Search/classes/class.ilSearchSettings.php';
 
                 $this->search_settings = new ilSearchSettings();
                 if(!$this->preventOverwritingMaxhits())
                         $this->setMaxHits($this->search_settings->getMaxHits());
         }

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◆ __updateEntryChilds()

ilSearchResult::__updateEntryChilds	(	$a_obj_id,
		$a_childs
	)

Update childs for a specific entry.

Parameters

integer	object object_id
array	array of child ids. E.g 'pg', 'st' private

Definition at line 516 of file class.ilSearchResult.php.

Referenced by diffEntriesFromResult(), intersectEntries(), and mergeEntries().

         {
                 if($this->entries[$a_obj_id] and is_array($a_childs))
                 {
                         foreach($a_childs as $child_id)
                         {
                                 if($child_id)
                                 {
                                         $this->entries[$a_obj_id]['child'][$child_id] = $child_id;
                                 }
                         }
                         return true;
                 }
                 return false;
         }

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◆ __updateResultChilds()

ilSearchResult::__updateResultChilds	(	$a_ref_id,
		$a_childs
	)

Update childs for a specific result.

Parameters

integer	object ref_id
array	array of child ids. E.g 'pg', 'st' private

Definition at line 538 of file class.ilSearchResult.php.

Referenced by ilShopSearchResult\filter(), filter(), and filterResults().

         {
                 if($this->results[$a_ref_id] and is_array($a_childs))
                 {
                         foreach($a_childs as $child_id)
                         {
                                 $this->results[$a_ref_id]['child'][$child_id] = $child_id;
                         }
                         return true;
                 }
                 return false;
         }

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◆ addEntry()

ilSearchResult::addEntry	(	$a_obj_id,
		$a_type,
		$found,
		$a_child_id = `0`
	)

add search result entry Entries are stored with 'obj_id'.

This method is typically called to store db query results.

Parameters

integer	object object_id
string	obj_type 'lm' or 'crs' ...
array	value position of query parser words in query string
integer	child id e.g id of page or chapter public

Definition at line 151 of file class.ilSearchResult.php.

Referenced by diffEntriesFromResult(), intersectEntries(), and mergeEntries().

         {
                 // Create new entry if it not exists
                 if(!$this->entries[$a_obj_id])
                 {
                         $this->entries[$a_obj_id]['obj_id'] = $a_obj_id;
                         $this->entries[$a_obj_id]['type'] = $a_type;
                         $this->entries[$a_obj_id]['found'] = $found;
 
                         if($a_child_id and $a_child_id != $a_obj_id)
                         {
                                 $this->entries[$a_obj_id]['child'][$a_child_id] = $a_child_id;
                         }
                 }
                 else
                 {
                         // replace or add child ('pg','st') id
                         if($a_child_id and $a_child_id != $a_obj_id)
                         {
                                 $this->entries[$a_obj_id]['child'][$a_child_id] = $a_child_id;
                         }
 
                         // UPDATE FOUND
                         $counter = 0;
                         foreach($found as $position)
                         {
                                 if($position)
                                 {
                                         $this->entries[$a_obj_id]['found'][$counter] = $position;
                                 }
                                 $counter++;
                         }
                 }
                 return true;
         }

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◆ addObserver()

ilSearchResult::addObserver	(	&	$a_class,
			$a_method
	)

The observer is used to call functions for filtering result.

Every callback function should support the following parameters: array of ids. E.g: ref_id = 5,array(obj_id = 1,type = 'crs'), The function should return true or false.

Parameters

object	class of callback function
string	name of callback method public

Definition at line 605 of file class.ilSearchResult.php.

         {
                 $this->observers[] = array('class' => $a_class,
                                                                    'method' => $a_method);
                 return true;
         }

◆ addResult()

ilSearchResult::addResult	(	$a_ref_id,
		$a_obj_id,
		$a_type
	)

add search result Results are stored with 'ref_id'.

This method is typically called after checking access of entries.

Parameters

integer	ref_id
integer	obj_id
string	obj_type 'lm' or 'crs' ... public

Definition at line 275 of file class.ilSearchResult.php.

Referenced by ilShopSearchResult\filter(), filter(), and filterResults().

         {
                 $this->results[$a_ref_id]['ref_id'] = $a_ref_id;
                 $this->results[$a_ref_id]['obj_id'] = $a_obj_id;
                 $this->results[$a_ref_id]['type']       = $a_type;
         }

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◆ callListeners()

ilSearchResult::callListeners	(		$a_ref_id,
		&	$a_data
	)

Definition at line 611 of file class.ilSearchResult.php.

Referenced by ilShopSearchResult\filter(), and filter().

         {
                 foreach($this->observers as $observer)
                 {
                         $class =& $observer['class'];
                         $method = $observer['method'];
 
                         if(!$class->$method($a_ref_id,$a_data))
                         {
                                 return false;
                         }
                 }
                 return true;
         }

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◆ diffEntriesFromResult()

ilSearchResult::diffEntriesFromResult ( & $result_obj )

diff entries of this instance and another result object Used for search in results

Parameters

object result_obj public

Definition at line 220 of file class.ilSearchResult.php.

References $ref_id, __updateEntryChilds(), addEntry(), and getEntries().

         {
                 $new_entries = $this->getEntries();
                 $this->entries = array();
 
                 // Get all checked objects
                 foreach($this->search_cache->getCheckedItems() as $ref_id => $obj_id)
                 {
                         if(isset($new_entries[$obj_id]))
                         {
                                 $this->addEntry($new_entries[$obj_id]['obj_id'],
                                                                 $new_entries[$obj_id]['type'],
                                                                 $new_entries[$obj_id]['found']);
                                 $this->__updateEntryChilds($new_entries[$obj_id]['obj_id'],
                                                                          $new_entries[$obj_id]['child']);
                         }
                 }
         }

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◆ filter()

ilSearchResult::filter	(	$a_root_node,
		$check_and
	)

Filter search result.

Do RBAC checks.

Allows paging of results for referenced objects

public

Parameters

int	root node id
bool	check and boolean search

Returns: bool success status

Definition at line 369 of file class.ilSearchResult.php.

References $ref_id, __updateResultChilds(), ilObject\_getAllReferences(), ilObject\_lookupType(), addResult(), callListeners(), getEntries(), getMaxHits(), getRequiredPermission(), and isOffsetReached().

         {
                 global $tree;
                 
                 // get ref_ids and check access
                 $counter = 0;
                 $offset_counter = 0;
                 foreach($this->getEntries() as $entry)
                 {
                         // boolean and failed continue
                         if($check_and and in_array(0,$entry['found']))
                         {
                                 continue;
                         }
                         // Types like role, rolt, user do not need rbac checks
                         $type = ilObject::_lookupType($entry['obj_id']);
                         if($type == 'rolt' or $type == 'usr' or $type == 'role')
                         {
                                 if($this->callListeners($entry['obj_id'],$entry))
                                 {
                                         $this->addResult($entry['obj_id'],$entry['obj_id'],$type);
                                         $counter += count($entry['child']);
                                         // Stop if maximum of hits is reached
                                         if(++$counter > $this->getMaxHits())
                                         {
                                                 $this->limit_reached = true;
                                                 return true;
                                         }
                                 }
                                 continue;
                         }
                         // Check referenced objects
                         foreach(ilObject::_getAllReferences($entry['obj_id']) as $ref_id)
                         {
                                 // Failed check: if ref id check is failed by previous search
                                 if($this->search_cache->isFailed($ref_id))
                                 {
                                         continue;
                                 }
                                 // Offset check
                                 if($this->search_cache->isChecked($ref_id) and !$this->isOffsetReached($offset_counter))
                                 {
                                         ++$offset_counter;
                                         continue;
                                 }
                                 
                                 if(!$this->callListeners($ref_id, $entry))
                                 {
                                         continue;
                                 }
                                 
                                 
                                 
                                 // RBAC check
                                 $type = ilObject::_lookupType($ref_id, true);
                                 if($this->ilAccess->checkAccessOfUser($this->getUserId(),
                                                                                                           $this->getRequiredPermission(),
                                                                                                           '',
                                                                                                           $ref_id,
                                                                                                           $type,
                                                                                                           $entry['obj_id']))
                                 {
                                         if($a_root_node == ROOT_FOLDER_ID or $tree->isGrandChild($a_root_node,$ref_id))
                                         {
                                                 // Call listeners
                                                 #if($this->callListeners($ref_id,$entry))
                                                 if(1)
                                                 {
                                                         $this->addResult($ref_id,$entry['obj_id'],$type);
                                                         $this->search_cache->appendToChecked($ref_id,$entry['obj_id']);
                                                         $this->__updateResultChilds($ref_id,$entry['child']);
 
                                                         $counter++;
                                                         $offset_counter++;
                                                         // Stop if maximum of hits is reached
                                                         
                                                         if($counter >= $this->getMaxHits())
                                                         {
                                                                 $this->limit_reached = true;
                                                                 $this->search_cache->setResults($this->results);
                                                                 return true;
                                                         }
                                                 }
                                         }
                                         continue;
                                 }
                                 $this->search_cache->appendToFailed($ref_id);
                         }
                 }
                 $this->search_cache->setResults($this->results);
                 return false;
         }

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◆ filterResults()

ilSearchResult::filterResults ( $a_root_node )

Filter search area of result set public.

Definition at line 467 of file class.ilSearchResult.php.

References __updateResultChilds(), addResult(), and getResults().

         {
                 global $tree;
 
                 $tmp_results = $this->getResults();
                 $this->results = array();
                 foreach($tmp_results as $result)
                 {
                         if($tree->isGrandChild($a_root_node,$result['ref_id']) and $tree->isInTree($result['ref_id']))
                         {
                                 $this->addResult($result['ref_id'],$result['obj_id'],$result['type']);
                                 $this->__updateResultChilds($result['ref_id'],$result['child']);
                         }
                 }
 
                 return true;
         }

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◆ getEntries()

ilSearchResult::getEntries ( )

Definition at line 110 of file class.ilSearchResult.php.

Referenced by diffEntriesFromResult(), ilShopSearchResult\diffEntriesFromResult(), ilShopSearchResult\filter(), filter(), intersectEntries(), and numEntries().

         {
                 return $this->entries ? $this->entries : array();
         }

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◆ getMaxHits()

ilSearchResult::getMaxHits ( )

Definition at line 124 of file class.ilSearchResult.php.

Referenced by filter(), ilShopSearchResult\getResultsForPresentation(), and initUserSearchCache().

         {
                 return $this->max_hits;
         }

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◆ getRequiredPermission()

ilSearchResult::getRequiredPermission ( )

Definition at line 95 of file class.ilSearchResult.php.

References $permission.

Referenced by ilShopSearchResult\filter(), and filter().

         {
                 return $this->permission;
         }

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◆ getResultIds()

ilSearchResult::getResultIds ( )

get result ids

public

Returns: array result ids

Definition at line 293 of file class.ilSearchResult.php.

References getResults().

         {
                 foreach($this->getResults() as $id => $tmp)
                 {
                         $ids[] = $id;
                 }
                 return $ids ? $ids : array();
         }

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◆ getResults()

ilSearchResult::getResults ( )

Definition at line 282 of file class.ilSearchResult.php.

Referenced by filterResults(), getResultIds(), getResultsByObjId(), ilShopSearchResult\getResultsForPresentation(), getResultsForPresentation(), and getSubitemIds().

         {
                 return $this->results ? $this->results : array();
         }

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◆ getResultsByObjId()

ilSearchResult::getResultsByObjId ( )

Definition at line 302 of file class.ilSearchResult.php.

References $ref_id, and getResults().

         {
                 $tmp_res = array();
                 foreach($this->getResults() as $ref_id => $res_data)
                 {
                         $tmp_res[$res_data['obj_id']][] = $ref_id;
                 }
                 return $tmp_res ? $tmp_res : array();
         }

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◆ getResultsForPresentation()

ilSearchResult::getResultsForPresentation ( )

Definition at line 334 of file class.ilSearchResult.php.

References $res, and getResults().

         {
                 $res = array();
                 
                 foreach($this->getResults() as $result)
                 {
                         $res[$result['ref_id']] = $result['obj_id'];    
                 }
                 return $res;
         }

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◆ getSubitemIds()

ilSearchResult::getSubitemIds ( )

Definition at line 345 of file class.ilSearchResult.php.

References $res, $row, and getResults().

         {
                 $res = array();
                 foreach($this->getResults() as $row)
                 {
                         $res[$row['obj_id']] = $row['child'];
                 }
                 return $res ? $res : array();
         }

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◆ getUniqueResults()

ilSearchResult::getUniqueResults ( )

Get unique results.

Return an array of obj_id (No multiple results for references) Results are stored with 'ref_id'. This method is typically called after checking access of entries. public

Definition at line 319 of file class.ilSearchResult.php.

References $result.

         {
                 $obj_ids = array();
                 foreach($this->results as $result)
                 {
                         if(in_array($result['obj_id'],$obj_ids))
                         {
                                 continue;
                         }
                         $obj_ids[] = $result['obj_id'];
                         $objects[] = $result;
                 }
                 return $objects ? $objects : array();
         }

◆ getUserId()

ilSearchResult::getUserId ( )

Definition at line 105 of file class.ilSearchResult.php.

References $user_id.

Referenced by initUserSearchCache().

         {
                 return $this->user_id;
         }

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◆ ilSearchResult()

ilSearchResult::ilSearchResult ( $a_user_id = 0 )

Constructor public.

Definition at line 68 of file class.ilSearchResult.php.

References $ilAccess, $ilDB, $ilias, $ilUser, __initSearchSettingsObject(), and initUserSearchCache().

         {
                 global $ilias,$ilAccess,$ilDB,$ilUser;
 
                 $this->ilAccess =& $ilAccess;
                 if($a_user_id)
                 {
                         $this->user_id = $a_user_id;
                 }
                 else
                 {
                         $this->user_id = $ilUser->getId();
                 }
                 $this->__initSearchSettingsObject();
                 $this->initUserSearchCache();
 
                 $this->db =& $ilDB;
         }

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◆ initUserSearchCache()

ilSearchResult::initUserSearchCache ( )

protected

Init user search cache.

private

Definition at line 568 of file class.ilSearchResult.php.

References ilUserSearchCache\_getInstance(), getMaxHits(), and getUserId().

Referenced by ilSearchResult().

         {
                 include_once('Services/Search/classes/class.ilUserSearchCache.php');
                 $this->search_cache = ilUserSearchCache::_getInstance($this->getUserId());
                 $this->offset = $this->getMaxHits() * ($this->search_cache->getResultPageNumber() - 1) ;
         }

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◆ intersectEntries()

ilSearchResult::intersectEntries ( & $result_obj )

Build intersection of entries (all entries that are present in both result sets)

Parameters

object result_obj public

Definition at line 245 of file class.ilSearchResult.php.

References __updateEntryChilds(), addEntry(), and getEntries().

         {
                 $new_entries = $this->getEntries();
                 $this->entries = array();
 
                 foreach($result_obj->getEntries() as $entry)
                 {
                         $obj_id = $entry['obj_id'];
                         if(isset($new_entries[$obj_id]))
                         {
                                 $this->addEntry($new_entries[$obj_id]['obj_id'],
                                                                 $new_entries[$obj_id]['type'],
                                                                 $new_entries[$obj_id]['found']);
 
                                 $this->__updateEntryChilds($new_entries[$obj_id]['obj_id'],
                                                                          $new_entries[$obj_id]['child']);
                         }
                 }
         }

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◆ isLimitReached()

ilSearchResult::isLimitReached ( )

Definition at line 115 of file class.ilSearchResult.php.

         {
                 return $this->limit_reached ? true : false;
         }

◆ isOffsetReached()

ilSearchResult::isOffsetReached ( $a_counter )

Check if offset is reached.

public

Parameters

int	current counter of result

Returns: bool reached or not

Definition at line 136 of file class.ilSearchResult.php.

Referenced by filter().

         {
                 return ($a_counter < $this->offset) ? false : true; 
         }

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◆ mergeEntries()

ilSearchResult::mergeEntries ( & $result_obj )

merge entries of this instance and another result object

Parameters

object result_obj public

Definition at line 203 of file class.ilSearchResult.php.

References __updateEntryChilds(), and addEntry().

         {
                 foreach($result_obj->getEntries() as $entry)
                 {
                         $this->addEntry($entry['obj_id'],$entry['type'],$entry['found']);
                         $this->__updateEntryChilds($entry['obj_id'],$entry['child']);
                 }
                 return true;
         }

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◆ numEntries()

ilSearchResult::numEntries ( )

Check number of entries public.

Definition at line 192 of file class.ilSearchResult.php.

References getEntries().

         {
                 return count($this->getEntries());
         }

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◆ preventOverwritingMaxhits()

ilSearchResult::preventOverwritingMaxhits ( $a_flag = null )

If you call this function and pass "true" the maxhits setting will not be overwritten in __initSearchSettingsObject()

public

Parameters

boolean $a_flag true or false to set the flag or leave blank to get the status of the flag boolean if called without parameter the status of the flag will be returned, otherwise $this

Definition at line 584 of file class.ilSearchResult.php.

References $preventOverwritingMaxhits.

Referenced by __initSearchSettingsObject().

         {
                 if(null === $a_flag)
                 {
                         return $this->preventOverwritingMaxhits;
                 }
                 
                 $this->preventOverwritingMaxhits = $a_flag;
                 
                 return $this;
         }

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◆ read()

ilSearchResult::read ( $a_type = DEFAULT_SEARCH )

read search results

Parameters

integer DEFAULT_SEARCH or ADVANCED_SEARCH public

Definition at line 503 of file class.ilSearchResult.php.

Referenced by ilAdvancedSearchGUI\performAdvMDSearch(), ilAdvancedSearchGUI\performSearch(), ilSearchGUI\performSearch(), ilAdvancedSearchGUI\showSavedAdvMDResults(), ilSearchGUI\showSavedResults(), and ilAdvancedSearchGUI\showSavedResults().

         {
                 $this->results = $this->search_cache->getResults();
         }

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◆ save()

ilSearchResult::save ( $a_type = DEFAULT_SEARCH )

Save search results.

Parameters

integer DEFAULT_SEARCH or ADVANCED_SEARCH public

Definition at line 492 of file class.ilSearchResult.php.

         {
                 $this->search_cache->save();
                 return false;
         }

◆ setMaxHits()

ilSearchResult::setMaxHits ( $a_max_hits )

Definition at line 120 of file class.ilSearchResult.php.

Referenced by ilShopSearchResult\__initSearchSettingsObject(), and __initSearchSettingsObject().

         {
                 $this->max_hits = $a_max_hits;
         }

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◆ setRequiredPermission()

ilSearchResult::setRequiredPermission ( $a_permission )

Set the required permission for the rbac checks in function 'filter()'.

Definition at line 90 of file class.ilSearchResult.php.

         {
                 $this->permission = $a_permission;
         }

◆ setUserId()

ilSearchResult::setUserId ( $a_user_id )

Definition at line 101 of file class.ilSearchResult.php.

         {
                 $this->user_id = $a_user_id;
         }

Field Documentation

◆ $entries

ilSearchResult::$entries = array()

Definition at line 47 of file class.ilSearchResult.php.

◆ $ilAccess

ilSearchResult::$ilAccess

Definition at line 56 of file class.ilSearchResult.php.

Referenced by ilSearchResult().

◆ $ilias

ilSearchResult::$ilias

Definition at line 55 of file class.ilSearchResult.php.

Referenced by ilSearchResult().

◆ $limit_reached

ilSearchResult::$limit_reached = false

Definition at line 59 of file class.ilSearchResult.php.

◆ $observers

ilSearchResult::$observers = array()

Definition at line 49 of file class.ilSearchResult.php.

◆ $offset

ilSearchResult::$offset = 0

protected

Definition at line 52 of file class.ilSearchResult.php.

◆ $permission

ilSearchResult::$permission = 'visible'

Definition at line 44 of file class.ilSearchResult.php.

Referenced by getRequiredPermission().

◆ $preventOverwritingMaxhits

ilSearchResult::$preventOverwritingMaxhits = false

protected

Definition at line 62 of file class.ilSearchResult.php.

Referenced by preventOverwritingMaxhits().

◆ $result

ilSearchResult::$result

Definition at line 60 of file class.ilSearchResult.php.

Referenced by ilShopSearchResult\getResultsForPresentation(), and getUniqueResults().

◆ $results

ilSearchResult::$results = array()

Definition at line 48 of file class.ilSearchResult.php.

Referenced by ilShopSearchResult\getResultsForPresentation(), and ilShopSearchResult\getUniqueResults().

◆ $search_cache

ilSearchResult::$search_cache = null

protected

Definition at line 51 of file class.ilSearchResult.php.

◆ $user_id

ilSearchResult::$user_id

Definition at line 46 of file class.ilSearchResult.php.

Referenced by getUserId().

The documentation for this class was generated from the following file:

Services/Search/classes/class.ilSearchResult.php

Public Member Functions

Data Fields

Protected Member Functions

Protected Attributes

Detailed Description

Member Function Documentation

◆ __initSearchSettingsObject()

◆ __updateEntryChilds()

◆ __updateResultChilds()

◆ addEntry()

◆ addObserver()

◆ addResult()

◆ callListeners()

◆ diffEntriesFromResult()

◆ filter()

◆ filterResults()

◆ getEntries()

◆ getMaxHits()

◆ getRequiredPermission()

◆ getResultIds()

◆ getResults()

◆ getResultsByObjId()

◆ getResultsForPresentation()

◆ getSubitemIds()

◆ getUniqueResults()

◆ getUserId()

◆ ilSearchResult()

◆ initUserSearchCache()

◆ intersectEntries()

◆ isLimitReached()

◆ isOffsetReached()

◆ mergeEntries()

◆ numEntries()

◆ preventOverwritingMaxhits()

◆ read()

◆ save()

◆ setMaxHits()

◆ setRequiredPermission()

◆ setUserId()

Field Documentation

◆ $entries

◆ $ilAccess

◆ $ilias

◆ $limit_reached

◆ $observers

◆ $offset

◆ $permission

◆ $preventOverwritingMaxhits

◆ $result

◆ $results

◆ $search_cache

◆ $user_id