ILIAS  release_5-1 Revision 5.0.0-5477-g43f3e3fab5f
Public Member Functions | Static Public Member Functions | Static Private Attributes
ilChangeEvent Class Reference

Class ilChangeEvent tracks change events on repository objects. More...

+ Collaboration diagram for ilChangeEvent:

Public Member Functions

 _recordWriteEvent ($obj_id, $usr_id, $action, $parent_obj_id=null)
 Records a write event. More...
 
 _recordReadEvent ($a_type, $a_ref_id, $obj_id, $usr_id, $isCatchupWriteEvents=true, $a_ext_rc=false, $a_ext_time=false)
 Records a read event and catches up with write events. More...
 
 _recordObjStats ($a_obj_id, $a_spent_seconds, $a_read_count, $a_childs_spent_seconds=null, $a_child_read_count=null)
 
 _syncObjectStats ($a_now=null, $a_minimum=20000)
 Process object statistics log data. More...
 
 _catchupWriteEvents ($obj_id, $usr_id, $timestamp=null)
 Catches up with all write events which occured before the specified timestamp. More...
 
 _updateAccessForScormOfflinePlayer ($obj_id, $usr_id, $i_last_access, $t_first_access)
 _updateAccessForScormOfflinePlayer needed to synchronize last_access and first_access when learning modul is used offline called in . More...
 

Static Public Member Functions

static _lookupUncaughtWriteEvents ($obj_id, $usr_id)
 Catches up with all write events which occured before the specified timestamp. More...
 
static _lookupChangeState ($obj_id, $usr_id)
 Returns the change state of the object for the specified user. More...
 
static _lookupInsideChangeState ($parent_obj_id, $usr_id)
 Returns the changed state of objects which are children of the specified parent object. More...
 
static _lookupReadEvents ($obj_id, $usr_id=null)
 Reads all read events which occured on the object which happened after the last time the user caught up with them. More...
 
static lookupUsersInProgress ($a_obj_id)
 Lookup users in progress. More...
 
static hasAccessed ($a_obj_id, $a_usr_id)
 Has accessed. More...
 
static _activate ()
 Activates change event tracking. More...
 
static _deactivate ()
 Deactivates change event tracking. More...
 
static _isActive ()
 Returns true, if change event tracking is active. More...
 
static _delete ($a_obj_id)
 Delete object entries. More...
 
static _deleteReadEvents ($a_obj_id)
 
static _deleteReadEventsForUsers ($a_obj_id, array $a_user_ids)
 
static _getAllUserIds ($a_obj_id)
 

Static Private Attributes

static $has_accessed = array()
 

Detailed Description

Class ilChangeEvent tracks change events on repository objects.

The following events are considered to be a 'write event':

  • The creation of a new repository object
  • A change of the data or meta-data of an object
  • A move, link, copy, deletion or undeletion of the object UI objects, which cause a 'write event', must call _recordWriteEvent(...) In most cases, UI objects let the user catch up with write events on the object, when doing this call.

The following events are considered to be a 'read event':

  • Opening a container object in the browser*
  • Opening / downloading / reading an object UI objects, which cause a 'read event', must call _recordReadEvent(...). In most cases, UI objects let the user catch up with write events on the object, when doing this call.

*reading the content of a container using WebDAV is not counted, because WebDAV clients can't see all objects in a container.

A user can catch up with write events, by calling __catchupWriteEvents(...).

A user can query, if an object has changed, since the last time he has caught up with write events, by calling _lookupUncaughtWriteEvents(...).

Author
Werner Randelshofer werne.nosp@m.r.ra.nosp@m.ndels.nosp@m.hofe.nosp@m.r@hsl.nosp@m.u.ch
Version
Id
class.ilChangeEvent.php,v 1.02 2007/05/07 19:25:34 wrandels Exp

Definition at line 36 of file class.ilChangeEvent.php.

Member Function Documentation

◆ _activate()

static ilChangeEvent::_activate ( )
static

Activates change event tracking.

Returns
mixed true on success, a string with an error message on failure.

Definition at line 877 of file class.ilChangeEvent.php.

References $ilDB, $query, $r, $res, and _isActive().

Referenced by ilObjRepositorySettingsGUI\saveSettings(), and ilTrackingTest\testChangeEvent().

877  {
878  if (ilChangeEvent::_isActive())
879  {
880  return 'change event tracking is already active';
881  }
882  else
883  {
884  global $ilDB;
885 
886  // Insert initial data into table write_event
887  // We need to do this here, because we need
888  // to catch up write events that occured while the change event tracking was
889  // deactivated.
890 
891  // IGNORE isn't supported in oracle
892  $set = $ilDB->query(sprintf('SELECT r1.obj_id,r2.obj_id p,d.owner,%s,d.create_date '.
893  'FROM object_data d '.
894  'LEFT JOIN write_event w ON d.obj_id = w.obj_id '.
895  'JOIN object_reference r1 ON d.obj_id=r1.obj_id '.
896  'JOIN tree t ON t.child=r1.ref_id '.
897  'JOIN object_reference r2 on r2.ref_id=t.parent '.
898  'WHERE w.obj_id IS NULL',
899  $ilDB->quote('create','text')));
900  while ($rec = $ilDB->fetchAssoc($set))
901  {
902  $nid = $ilDB->nextId("write_event");
903  $query = 'INSERT INTO write_event '.
904  '(write_id, obj_id,parent_obj_id,usr_id,action,ts) VALUES ('.
905  $ilDB->quote($nid, "integer").",".
906  $ilDB->quote($rec["obj_id"], "integer").",".
907  $ilDB->quote($rec["p"], "integer").",".
908  $ilDB->quote($rec["owner"], "integer").",".
909  $ilDB->quote("create", "text").",".
910  $ilDB->quote($rec["create_date"], "timestamp").
911  ')';
912  $res = $ilDB->query($query);
913  }
914 
915  if ($ilDB->isError($res) || $ilDB->isError($res->result))
916  {
917  return 'couldn\'t insert initial data into table "write_event": '.
918  (($ilDB->isError($r->result)) ? $r->result->getMessage() : $r->getMessage());
919  }
920 
921 
922  global $ilias;
923  $ilias->setSetting('enable_change_event_tracking', '1');
924 
925  return $res;
926  }
927  }
$r
$r
Definition: example_031.php:79
ilChangeEvent\_isActive
static _isActive()
Returns true, if change event tracking is active.
Definition: class.ilChangeEvent.php:945
$ilDB
global $ilDB
Definition: storeScorm2004.php:16
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◆ _catchupWriteEvents()

ilChangeEvent::_catchupWriteEvents (   $obj_id,
  $usr_id,
  $timestamp = null 
)

Catches up with all write events which occured before the specified timestamp.

Parameters
$obj_idint The object.
$usr_idint The user.
$timestampSQL timestamp.

Definition at line 489 of file class.ilChangeEvent.php.

References $ilDB, $query, $res, $timestamp, and ilUtil\now().

Referenced by _recordReadEvent(), ilContainerGUI\pasteObject(), ilContainerGUI\performPasteIntoMultipleObjectsObject(), ilDAVServer\PUT(), ilRepUtil\restoreObjects(), ilObjFileGUI\update(), ilObjRootFolderGUI\updateObject(), ilObjGroupGUI\updateObject(), ilObjCategoryGUI\updateObject(), and ilObjCourseGUI\updateObject().

490  {
491  global $ilDB;
492 
493  $query = "SELECT obj_id FROM catch_write_events ".
494  "WHERE obj_id = ".$ilDB->quote($obj_id ,'integer')." ".
495  "AND usr_id = ".$ilDB->quote($usr_id ,'integer');
496  $res = $ilDB->query($query);
497  if($res->numRows())
498  {
499  $ts = ($timestamp == null)
500  ? ilUtil::now()
501  : $timestamp;
502 /* $query = "UPDATE catch_write_events ".
503  "SET ts = ".($timestamp == null ? $ilDB->now() : $ilDB->quote($timestamp, 'timestamp'))." ".
504  "WHERE usr_id = ".$ilDB->quote($usr_id ,'integer')." ".
505  "AND obj_id = ".$ilDB->quote($obj_id ,'integer');
506  $res = $ilDB->manipulate($query);*/
507  }
508  else
509  {
510  $ts = ilUtil::now();
511 /* $query = "INSERT INTO catch_write_events (ts,obj_id,usr_id) ".
512  "VALUES( ".
513  $ilDB->now().", ".
514  $ilDB->quote($obj_id,'integer').", ".
515  $ilDB->quote($usr_id,'integer')." ".
516  ")";
517  $res = $ilDB->manipulate($query);*/
518  }
519 
520  // alex, use replace due to bug #10406
521  $ilDB->replace("catch_write_events",
522  array(
523  "obj_id" => array("integer", $obj_id),
524  "usr_id" => array("integer", $usr_id)
525  ),
526  array(
527  "ts" => array("timestamp", $ts))
528  );
529  }
ilUtil\now
static now()
Return current timestamp in Y-m-d H:i:s format.
Definition: class.ilUtil.php:4239
$timestamp
foreach($mandatory_scripts as $file) $timestamp
Definition: buildRTE.php:81
$ilDB
global $ilDB
Definition: storeScorm2004.php:16
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◆ _deactivate()

static ilChangeEvent::_deactivate ( )
static

Deactivates change event tracking.

Returns
mixed true on success, a string with an error message on failure.

Definition at line 934 of file class.ilChangeEvent.php.

Referenced by ilObjRepositorySettingsGUI\saveSettings(), and ilTrackingTest\testChangeEvent().

934  {
935  global $ilias;
936  $ilias->setSetting('enable_change_event_tracking', '0');
937 
938  }
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◆ _delete()

static ilChangeEvent::_delete (   $a_obj_id)
static

Delete object entries.

Returns

Definition at line 957 of file class.ilChangeEvent.php.

References $ilDB, and $query.

Referenced by ilObjectLP\handleDelete().

958  {
959  global $ilDB;
960 
961  $query = sprintf('DELETE FROM write_event WHERE obj_id = %s ',
962  $ilDB->quote($a_obj_id,'integer'));
963  $aff = $ilDB->manipulate($query);
964 
965  $query = sprintf('DELETE FROM read_event WHERE obj_id = %s ',
966  $ilDB->quote($a_obj_id,'integer'));
967  $aff = $ilDB->manipulate($query);
968  return true;
969  }
$ilDB
global $ilDB
Definition: storeScorm2004.php:16
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◆ _deleteReadEvents()

static ilChangeEvent::_deleteReadEvents (   $a_obj_id)
static

Definition at line 971 of file class.ilChangeEvent.php.

References $ilDB.

972  {
973  global $ilDB;
974 
975  $ilDB->manipulate("DELETE FROM read_event".
976  " WHERE obj_id = ".$ilDB->quote($a_obj_id, "integer"));
977  }
$ilDB
global $ilDB
Definition: storeScorm2004.php:16

◆ _deleteReadEventsForUsers()

static ilChangeEvent::_deleteReadEventsForUsers (   $a_obj_id,
array  $a_user_ids 
)
static

Definition at line 979 of file class.ilChangeEvent.php.

References $ilDB.

Referenced by ilObjSCORM2004LearningModule\deleteTrackingDataOfUsers(), ilObjSCORMLearningModule\deleteTrackingDataOfUsers(), and ilObjectLP\resetLPDataForUserIds().

980  {
981  global $ilDB;
982 
983  $ilDB->manipulate("DELETE FROM read_event".
984  " WHERE obj_id = ".$ilDB->quote($a_obj_id, "integer").
985  " AND ".$ilDB->in("usr_id", $a_user_ids, "", "integer"));
986  }
$ilDB
global $ilDB
Definition: storeScorm2004.php:16
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◆ _getAllUserIds()

static ilChangeEvent::_getAllUserIds (   $a_obj_id)
static

Definition at line 988 of file class.ilChangeEvent.php.

References $ilDB, $res, and $row.

Referenced by ilObjectLP\gatherLPUsers().

989  {
990  global $ilDB;
991 
992  $res = array();
993 
994  $set = $ilDB->query("SELECT usr_id FROM read_event".
995  " WHERE obj_id = ".$ilDB->quote($a_obj_id, "integer"));
996  while($row = $ilDB->fetchAssoc($set))
997  {
998  $res[] = $row["usr_id"];
999  }
1000 
1001  return $res;
1002  }
$ilDB
global $ilDB
Definition: storeScorm2004.php:16
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◆ _isActive()

static ilChangeEvent::_isActive ( )
static

Returns true, if change event tracking is active.

Returns
mixed true on success, a string with an error message on failure.

Definition at line 945 of file class.ilChangeEvent.php.

Referenced by ilObjUserTracking\__readSettings(), _activate(), ilInfoScreenGUI\addObjectSections(), ilObjRepositorySettingsGUI\addToExternalSettingsForm(), ilObjectListGUI\getProperties(), and ilObjRepositorySettingsGUI\initSettingsForm().

945  {
946  global $ilias;
947  return $ilias->getSetting('enable_change_event_tracking', '0') == '1';
948 
949  }
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◆ _lookupChangeState()

static ilChangeEvent::_lookupChangeState (   $obj_id,
  $usr_id 
)
static

Returns the change state of the object for the specified user.

which happened after the last time the user caught up with them.

Parameters
$obj_idint The object
$usr_idint The user who is interested into these events.
Returns
0 = object is unchanged, 1 = object is new, 2 = object has changed

Definition at line 631 of file class.ilChangeEvent.php.

References $ilDB, $query, $r, $res, $row, and DB_FETCHMODE_ASSOC.

Referenced by ilObjectListGUI\getProperties(), and ilTrackingTest\testChangeEvent().

632  {
633  global $ilDB;
634 
635  $q = "SELECT ts ".
636  "FROM catch_write_events ".
637  "WHERE obj_id=".$ilDB->quote($obj_id ,'integer')." ".
638  "AND usr_id=".$ilDB->quote($usr_id ,'integer');
639  $r = $ilDB->query($q);
640  $catchup = null;
641  while ($row = $r->fetchRow(DB_FETCHMODE_ASSOC)) {
642  $catchup = $row['ts'];
643  }
644 
645  if($catchup == null)
646  {
647  $ilDB->setLimit(1);
648  $query = sprintf('SELECT * FROM write_event '.
649  'WHERE obj_id = %s '.
650  'AND usr_id <> %s ',
651  $ilDB->quote($obj_id,'integer'),
652  $ilDB->quote($usr_id,'integer'));
653  $res = $ilDB->query($query);
654  }
655  else
656  {
657  $ilDB->setLimit(1);
658  $query = sprintf('SELECT * FROM write_event '.
659  'WHERE obj_id = %s '.
660  'AND usr_id <> %s '.
661  'AND ts > %s ',
662  $ilDB->quote($obj_id,'integer'),
663  $ilDB->quote($usr_id,'integer'),
664  $ilDB->quote($catchup,'timestamp'));
665  $res = $ilDB->query($query);
666  }
667 
668  $numRows = $res->numRows();
669  if ($numRows > 0)
670  {
671  $row = $ilDB->fetchAssoc($res);
672  // if we have write events, and user never catched one, report as new (1)
673  // if we have write events, and user catched an old write event, report as changed (2)
674  return ($catchup == null) ? 1 : 2;
675  }
676  else
677  {
678  return 0; // user catched all write events, report as unchanged (0)
679  }
680  }
$r
$r
Definition: example_031.php:79
DB_FETCHMODE_ASSOC
const DB_FETCHMODE_ASSOC
Definition: class.ilDB.php:10
$ilDB
global $ilDB
Definition: storeScorm2004.php:16
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◆ _lookupInsideChangeState()

static ilChangeEvent::_lookupInsideChangeState (   $parent_obj_id,
  $usr_id 
)
static

Returns the changed state of objects which are children of the specified parent object.

Note this gives a different result than calling _lookupChangeState of each child object. This is because, this function treats a catch on the write events on the parent as a catch up for all child objects. This difference was made, because it greatly improves performance of this function.

Parameters
$parent_obj_idint The object id of the parent object.
$usr_idint The user who is interested into these events.
Returns
0 = object has not been changed inside 1 = object has been changed inside

Definition at line 696 of file class.ilChangeEvent.php.

References $ilDB, $query, $r, $res, $row, and DB_FETCHMODE_ASSOC.

Referenced by ilObjectListGUI\getProperties(), and ilTrackingTest\testChangeEvent().

697  {
698  global $ilDB;
699 
700  $q = "SELECT ts ".
701  "FROM catch_write_events ".
702  "WHERE obj_id=".$ilDB->quote($parent_obj_id)." ".
703  "AND usr_id=".$ilDB->quote($usr_id);
704  $r = $ilDB->query($q);
705  $catchup = null;
706  while ($row = $r->fetchRow(DB_FETCHMODE_ASSOC)) {
707  $catchup = $row['ts'];
708  }
709 
710  if($catchup == null)
711  {
712  $ilDB->setLimit(1);
713  $query = sprintf('SELECT * FROM write_event '.
714  'WHERE parent_obj_id = %s '.
715  'AND usr_id <> %s ',
716  $ilDB->quote($parent_obj_id,'integer'),
717  $ilDB->quote($usr_id,'integer'));
718  $res = $ilDB->query($query);
719  }
720  else
721  {
722  $ilDB->setLimit(1);
723  $query = sprintf('SELECT * FROM write_event '.
724  'WHERE parent_obj_id = %s '.
725  'AND usr_id <> %s '.
726  'AND ts > %s ',
727  $ilDB->quote($parent_obj_id,'integer'),
728  $ilDB->quote($usr_id,'integer'),
729  $ilDB->quote($catchup,'timestamp'));
730  $res = $ilDB->query($query);
731  }
732  $numRows = $res->numRows();
733  if ($numRows > 0)
734  {
735  $row = $ilDB->fetchAssoc($res);
736  // if we have write events, and user never catched one, report as new (1)
737  // if we have write events, and user catched an old write event, report as changed (2)
738  return ($catchup == null) ? 1 : 2;
739  }
740  else
741  {
742  return 0; // user catched all write events, report as unchanged (0)
743  }
744  }
$r
$r
Definition: example_031.php:79
DB_FETCHMODE_ASSOC
const DB_FETCHMODE_ASSOC
Definition: class.ilDB.php:10
$ilDB
global $ilDB
Definition: storeScorm2004.php:16
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◆ _lookupReadEvents()

static ilChangeEvent::_lookupReadEvents (   $obj_id,
  $usr_id = null 
)
static

Reads all read events which occured on the object which happened after the last time the user caught up with them.

NOTE: THIS FUNCTION NEEDS TO BE REWRITTEN. READ EVENTS ARE OF INTEREST AT REF_ID's OF OBJECTS.

Parameters
$obj_idint The object
$usr_idint The user who is interested into these events. / public static function _lookupUncaughtReadEvents($obj_id, $usr_id) { global $ilDB;

$q = "SELECT ts ". "FROM catch_read_events ". "WHERE obj_id=".$ilDB->quote($obj_id)." ". "AND usr_id=".$ilDB->quote($usr_id); $r = $ilDB->query($q); $catchup = null; while ($row = $r->fetchRow(DB_FETCHMODE_ASSOC)) { $catchup = $row['ts']; }

$q = "SELECT * ". "FROM read_event ". "WHERE obj_id=".$ilDB->quote($obj_id)." ". ($catchup == null ? "" : "AND last_access > ".$ilDB->quote($catchup))." ". ($catchup == null ? "" : "AND last_access > ".$ilDB->quote($catchup))." ". "ORDER BY last_access DESC"; $r = $ilDB->query($q); $events = array(); while ($row = $r->fetchRow(DB_FETCHMODE_ASSOC)) { $events[] = $row; } return $events; } Reads all read events which occured on the object.

Parameters
$obj_idint The object
$usr_idint Optional, the user who performed these events.

Definition at line 789 of file class.ilChangeEvent.php.

References $ilDB, $query, $res, and $row.

Referenced by ilLPStatusDownloaded\_getCompleted(), ilLPStatusVisits\_getCompleted(), ilLPStatusTypicalLearningTime\_getCompleted(), ilLPStatusVisits\_getInProgress(), ilLPStatusTypicalLearningTime\_getInProgress(), ilLearningProgress\_getProgress(), ilLearningProgress\_lookupProgressByObjId(), ilInfoScreenGUI\addObjectSections(), ilLPStatusVisits\determinePercentage(), ilLPStatusTypicalLearningTime\determinePercentage(), ilLPStatusVisits\determineStatus(), ilLPStatusTypicalLearningTime\determineStatus(), and ilSCORMOfflineMode\il2sopSahsUser().

790  {
791  global $ilDB;
792 
793  if ($usr_id == null)
794  {
795  $query = sprintf('SELECT * FROM read_event '.
796  'WHERE obj_id = %s '.
797  'ORDER BY last_access DESC',
798  $ilDB->quote($obj_id,'integer'));
799  $res = $ilDB->query($query);
800  }
801  else
802  {
803  $query = sprintf('SELECT * FROM read_event '.
804  'WHERE obj_id = %s '.
805  'AND usr_id = %s '.
806  'ORDER BY last_access DESC',
807  $ilDB->quote($obj_id,'integer'),
808  $ilDB->quote($usr_id,'integer'));
809  $res = $ilDB->query($query);
810  }
811 
812  $counter = 0;
813  while ($row = $ilDB->fetchAssoc($res))
814  {
815  $events[$counter]['obj_id'] = $row['obj_id'];
816  $events[$counter]['usr_id'] = $row['usr_id'];
817  $events[$counter]['last_access'] = $row['last_access'];
818  $events[$counter]['read_count'] = $row['read_count'];
819  $events[$counter]['spent_seconds'] = $row['spent_seconds'];
820  $events[$counter]['first_access'] = $row['first_access'];
821 
822  $counter++;
823 
824  }
825  return $events ? $events : array();
826  }
$ilDB
global $ilDB
Definition: storeScorm2004.php:16
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◆ _lookupUncaughtWriteEvents()

static ilChangeEvent::_lookupUncaughtWriteEvents (   $obj_id,
  $usr_id 
)
static

Catches up with all write events which occured before the specified timestamp.

THIS FUNCTION IS CURRENTLY NOT IN USE. BEFORE IT CAN BE USED, THE TABLE catch_read_events MUST BE CREATED.

Parameters
$obj_idint The object.
$usr_idint The user.
$timestampSQL timestamp. / function _catchupReadEvents($obj_id, $usr_id, $timestamp = null) { global $ilDB;
    $q = "INSERT INTO catch_read_events ".
            "(obj_id, usr_id, action, ts) ".
            "VALUES (".
            $ilDB->quote($obj_id).",".
            $ilDB->quote($usr_id).",".
            $ilDB->quote('read').",";
    if ($timestamp == null)
    {
            $q .= "NOW()".
            ") ON DUPLICATE KEY UPDATE ts=NOW()";
    }
    else {
            $q .= $ilDB->quote($timestamp).
            ") ON DUPLICATE KEY UPDATE ts=".$ilDB->quote($timestamp);
    }

    $r = $ilDB->query($q);

} Reads all write events which occured on the object which happened after the last time the user caught up with them.

Parameters
$obj_idint The object
$usr_idint The user who is interested into these events.
Returns
array with rows from table write_event

Definition at line 578 of file class.ilChangeEvent.php.

References $ilDB, $query, $r, $res, $row, and DB_FETCHMODE_ASSOC.

Referenced by ilTrackingTest\testChangeEvent().

579  {
580  global $ilDB;
581 
582  $q = "SELECT ts ".
583  "FROM catch_write_events ".
584  "WHERE obj_id=".$ilDB->quote($obj_id ,'integer')." ".
585  "AND usr_id=".$ilDB->quote($usr_id ,'integer');
586  $r = $ilDB->query($q);
587  $catchup = null;
588  while ($row = $r->fetchRow(DB_FETCHMODE_ASSOC)) {
589  $catchup = $row['ts'];
590  }
591 
592  if($catchup == null)
593  {
594  $query = sprintf('SELECT * FROM write_event '.
595  'WHERE obj_id = %s '.
596  'AND usr_id <> %s '.
597  'ORDER BY ts DESC',
598  $ilDB->quote($obj_id,'integer'),
599  $ilDB->quote($usr_id,'integer'));
600  $res = $ilDB->query($query);
601  }
602  else
603  {
604  $query = sprintf('SELECT * FROM write_event '.
605  'WHERE obj_id = %s '.
606  'AND usr_id <> %s '.
607  'AND ts >= %s '.
608  'ORDER BY ts DESC',
609  $ilDB->quote($obj_id,'integer'),
610  $ilDB->quote($usr_id,'integer'),
611  $ilDB->quote($catchup,'timestamp'));
612  $res = $ilDB->query($query);
613  }
614  $events = array();
615  while($row = $ilDB->fetchAssoc($res))
616  {
617  $events[] = $row;
618  }
619  return $events;
620  }
$r
$r
Definition: example_031.php:79
DB_FETCHMODE_ASSOC
const DB_FETCHMODE_ASSOC
Definition: class.ilDB.php:10
$ilDB
global $ilDB
Definition: storeScorm2004.php:16
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◆ _recordObjStats()

ilChangeEvent::_recordObjStats (   $a_obj_id,
  $a_spent_seconds,
  $a_read_count,
  $a_childs_spent_seconds = null,
  $a_child_read_count = null 
)

Definition at line 325 of file class.ilChangeEvent.php.

References $ilDB, ilObjUserTracking\_enabledObjectStatistics(), and ilObject\_lookupType().

326  {
327  global $ilDB;
328 
329  if (!ilObjUserTracking::_enabledObjectStatistics() ||
330  (int)$a_obj_id <= 0) // #12706
331  {
332  return;
333  }
334 
335  $now = time();
336 
337  $fields = array();
338  $fields["obj_id"] = array("integer", $a_obj_id);
339  $fields["obj_type"] = array("text", ilObject::_lookupType($a_obj_id));
340  $fields["tstamp"] = array("timestamp", $now);
341  $fields["yyyy"] = array("integer", date("Y"));
342  $fields["mm"] = array("integer", date("m"));
343  $fields["dd"] = array("integer", date("d"));
344  $fields["hh"] = array("integer", date("H"));
345  if($a_spent_seconds > 0)
346  {
347  $fields["spent_seconds"] = array("integer", $a_spent_seconds);
348  }
349  if($a_read_count > 0)
350  {
351  $fields["read_count"] = array("integer", $a_read_count);
352  }
353  if($a_childs_spent_seconds > 0)
354  {
355  $fields["childs_spent_seconds"] = array("integer", $a_childs_spent_seconds);
356  }
357  if($a_child_read_count > 0)
358  {
359  $fields["childs_read_count"] = array("integer", $a_child_read_count);
360  }
361  $ilDB->insert("obj_stat_log", $fields);
362 
363  // 0.01% probability
364  if(mt_rand(1, 100) == 1)
365  {
366  self::_syncObjectStats($now);
367  }
368  }
ilObjUserTracking\_enabledObjectStatistics
static _enabledObjectStatistics()
check wether object statistics is enabled or not
Definition: class.ilObjUserTracking.php:102
ilObject\_lookupType
static _lookupType($a_id, $a_reference=false)
lookup object type
Definition: class.ilObject.php:1196
$ilDB
global $ilDB
Definition: storeScorm2004.php:16
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◆ _recordReadEvent()

ilChangeEvent::_recordReadEvent (   $a_type,
  $a_ref_id,
  $obj_id,
  $usr_id,
  $isCatchupWriteEvents = true,
  $a_ext_rc = false,
  $a_ext_time = false 
)

Records a read event and catches up with write events.

Parameters
$obj_idint The object which was read.
$usr_idint The user who performed a read action.
$catchupWriteEventsboolean If true, this function catches up with write events.

Definition at line 113 of file class.ilChangeEvent.php.

References $ilDB, $path, $query, $res, $row, _catchupWriteEvents(), ilObjUserTracking\_getValidTimeSpan(), ilObject\_lookupObjId(), and ilObject\_lookupType().

Referenced by ilLicense\_noteAccess(), ilObjSCORMTracking\_syncReadEvent(), ilSCORM2004Tracking\_syncReadEvent(), ilLearningProgress\_tracProgress(), ilRemoteObjectBaseGUI\callObject(), ilDAVServer\COPY(), ilDAVServer\GET(), ilObjMediaCast\handleLPUpdate(), ilWikiPageGUI\increaseViewCount(), ilObjSessionGUI\infoScreen(), ilContainerGUI\performPasteIntoMultipleObjectsObject(), ilDAVServer\PROPFIND(), ilObjLinkResourceGUI\redirectToLink(), ilObjFileGUI\sendFile(), ilContainerContentGUI\setOutput(), ilObjMediaCastGUI\showContentObject(), ilObjSCORMTracking\syncGlobalStatus(), ilObjTestGUI\trackTestObjectReadEvent(), ilCourseContentGUI\view(), and ilObjectGUI\viewObject().

115  {
116  global $ilDB, $tree;
117 
118  /* read_event data is now used for several features, so we are always keeping track
119  if (!ilChangeEvent::_isActive())
120  {
121  return;
122  }
123  */
124 
125  include_once('Services/Tracking/classes/class.ilObjUserTracking.php');
126  $validTimeSpan = ilObjUserTracking::_getValidTimeSpan();
127 
128  $query = sprintf('SELECT * FROM read_event '.
129  'WHERE obj_id = %s '.
130  'AND usr_id = %s ',
131  $ilDB->quote($obj_id,'integer'),
132  $ilDB->quote($usr_id,'integer'));
133  $res = $ilDB->query($query);
134  $row = $ilDB->fetchObject($res);
135 
136  // read counter
137  if ($a_ext_rc !== false)
138  {
139  $read_count = 'read_count = '.$ilDB->quote($a_ext_rc, "integer").", ";
140  $read_count_init = max(1, (int) $a_ext_rc);
141  $read_count_diff = max(1, (int) $a_ext_rc) - $row->read_count;
142  }
143  else
144  {
145  $read_count = 'read_count = read_count + 1, ';
146  $read_count_init = 1;
147  $read_count_diff = 1;
148  }
149 
150  if ($row)
151  {
152 
153  if ($a_ext_time !== false)
154  {
155  $time = (int) $a_ext_time;
156  }
157  else
158  {
159  $time = $ilDB->quote((time() - $row->last_access) <= $validTimeSpan
160  ? $row->spent_seconds + time() - $row->last_access
161  : $row->spent_seconds,'integer');
162 
163  // if we are in the valid interval, we do not
164  // add anything to the read_count, since this is the
165  // same access for us
166  if ((time() - $row->last_access) <= $validTimeSpan)
167  {
168  $read_count = '';
169  $read_count_init = 1;
170  $read_count_diff = 0;
171  }
172  }
173  $time_diff = $time - (int) $row->spent_seconds;
174 
175  // Update
176  $query = sprintf('UPDATE read_event SET '.
177  $read_count.
178  'spent_seconds = %s, '.
179  'last_access = %s '.
180  'WHERE obj_id = %s '.
181  'AND usr_id = %s ',
182  $time,
183  $ilDB->quote(time(),'integer'),
184  $ilDB->quote($obj_id,'integer'),
185  $ilDB->quote($usr_id,'integer'));
186  $aff = $ilDB->manipulate($query);
187 
188  self::_recordObjStats($obj_id, $time_diff, $read_count_diff);
189  }
190  else
191  {
192  if ($a_ext_time !== false)
193  {
194  $time = (int) $a_ext_time;
195  }
196  else
197  {
198  $time = 0;
199  }
200 
201  $time_diff = $time - (int) $row->spent_seconds;
202 
203  /*
204  $query = sprintf('INSERT INTO read_event (obj_id,usr_id,last_access,read_count,spent_seconds,first_access) '.
205  'VALUES (%s,%s,%s,%s,%s,'.$ilDB->now().') ',
206  $ilDB->quote($obj_id,'integer'),
207  $ilDB->quote($usr_id,'integer'),
208  $ilDB->quote(time(),'integer'),
209  $ilDB->quote($read_count_init,'integer'),
210  $ilDB->quote($time,'integer'));
211  $ilDB->manipulate($query);
212  */
213 
214  // #10407
215  $ilDB->replace('read_event',
216  array(
217  'obj_id' => array('integer', $obj_id),
218  'usr_id' => array('integer', $usr_id)
219  ),
220  array(
221  'read_count' => array('integer', $read_count_init),
222  'spent_seconds' => array('integer', $time),
223  'first_access' => array('timestamp', date("Y-m-d H:i:s")), // was $ilDB->now()
224  'last_access' => array('integer', time())
225  )
226  );
227 
228  self::$has_accessed[$obj_id][$usr_id] = true;
229 
230  self::_recordObjStats($obj_id, $time_diff, $read_count_diff);
231  }
232 
233  if ($isCatchupWriteEvents)
234  {
235  ilChangeEvent::_catchupWriteEvents($obj_id, $usr_id);
236  }
237 
238  // update parents (no categories or root)
239  if (!in_array($a_type, array("cat", "root", "crs")))
240  {
241  if ($tree->isInTree($a_ref_id))
242  {
243  $path = $tree->getPathId($a_ref_id);
244 
245  foreach ($path as $p)
246  {
247  $obj2_id = ilObject::_lookupObjId($p);
248  $obj2_type = ilObject::_lookupType($obj2_id);
249 //echo "<br>1-$obj2_type-$p-$obj2_id-";
250  if (($p != $a_ref_id) && (in_array($obj2_type, array("crs", "fold", "grp"))))
251  {
252  $query = sprintf('SELECT * FROM read_event '.
253  'WHERE obj_id = %s '.
254  'AND usr_id = %s ',
255  $ilDB->quote($obj2_id, 'integer'),
256  $ilDB->quote($usr_id, 'integer'));
257  $res2 = $ilDB->query($query);
258  if ($row2 = $ilDB->fetchAssoc($res2))
259  {
260 //echo "<br>2";
261  // update read count and spent seconds
262  $query = sprintf('UPDATE read_event SET '.
263  'childs_read_count = childs_read_count + %s ,'.
264  'childs_spent_seconds = childs_spent_seconds + %s '.
265  'WHERE obj_id = %s '.
266  'AND usr_id = %s ',
267  $ilDB->quote((int) $read_count_diff,'integer'),
268  $ilDB->quote((int) $time_diff,'integer'),
269  $ilDB->quote($obj2_id,'integer'),
270  $ilDB->quote($usr_id,'integer'));
271  $aff = $ilDB->manipulate($query);
272 
273  self::_recordObjStats($obj2_id, null, null, (int)$time_diff, (int)$read_count_diff);
274  }
275  else
276  {
277 //echo "<br>3";
278 //$ilLog->write("insert read event for obj_id -".$obj2_id."-".$usr_id."-");
279  /*
280  $query = sprintf('INSERT INTO read_event (obj_id,usr_id,last_access,read_count,spent_seconds,first_access,'.
281  'childs_read_count, childs_spent_seconds) '.
282  'VALUES (%s,%s,%s,%s,%s,'.$ilDB->now().', %s, %s) ',
283  $ilDB->quote($obj2_id,'integer'),
284  $ilDB->quote($usr_id,'integer'),
285  $ilDB->quote(time(),'integer'),
286  $ilDB->quote(1,'integer'),
287  $ilDB->quote($time,'integer'),
288  $ilDB->quote((int) $read_count_diff,'integer'),
289  $ilDB->quote((int) $time_diff,'integer')
290  );
291  $aff = $ilDB->manipulate($query);
292  */
293 
294  // #10407
295  $ilDB->replace('read_event',
296  array(
297  'obj_id' => array('integer', $obj2_id),
298  'usr_id' => array('integer', $usr_id)
299  ),
300  array(
301  'read_count' => array('integer', 1),
302  'spent_seconds' => array('integer', $time),
303  'first_access' => array('timestamp', date("Y-m-d H:i:s")), // was $ilDB->now()
304  'last_access' => array('integer', time()),
305  'childs_read_count' => array('integer', (int)$read_count_diff),
306  'childs_spent_seconds' => array('integer', (int)$time_diff)
307  )
308  );
309 
310  self::$has_accessed[$obj2_id][$usr_id] = true;
311 
312  self::_recordObjStats($obj2_id, $time, 1, (int)$time_diff, (int)$read_count_diff);
313  }
314  }
315  }
316  }
317  }
318 
319  // @todo:
320  // - calculate diff of spent_seconds and read_count
321  // - use ref id to get parents of types grp, crs, fold
322  // - add diffs to childs_spent_seconds and childs_read_count
323  }
ilObject\_lookupObjId
static _lookupObjId($a_id)
Definition: class.ilObject.php:1041
ilObject\_lookupType
static _lookupType($a_id, $a_reference=false)
lookup object type
Definition: class.ilObject.php:1196
$path
$path
Definition: index.php:22
$ilDB
global $ilDB
Definition: storeScorm2004.php:16
ilChangeEvent\_catchupWriteEvents
_catchupWriteEvents($obj_id, $usr_id, $timestamp=null)
Catches up with all write events which occured before the specified timestamp.
Definition: class.ilChangeEvent.php:489
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◆ _recordWriteEvent()

ilChangeEvent::_recordWriteEvent (   $obj_id,
  $usr_id,
  $action,
  $parent_obj_id = null 
)

Records a write event.

The parent object should be specified for the 'delete', 'undelete' and 'add' and 'remove' events.

Parameters
$obj_idint The object which was written to.
$usr_idint The user who performed a write action.
$actionstring The name of the write action. 'create', 'update', 'delete', 'add', 'remove', 'undelete'.
$parent_obj_idint The object id of the parent object. If this is null, then the event is recorded for all parents of the object. If this is not null, then the event is only recorded for the specified parent.

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

References $ilDB, and $query.

Referenced by ilObjCourseGUI\afterSave(), ilDAVServer\COPY(), ilDAVServer\DELETE(), ilObjFileGUI\handleFileUpload(), ilDAVServer\MKCOL(), ilDAVServer\MOVE(), ilContainerGUI\pasteObject(), ilContainerGUI\performPasteIntoMultipleObjectsObject(), ilDAVServer\PUT(), ilObject2GUI\putObjectInTree(), ilObjectGUI\putObjectInTree(), ilRepUtil\removeObjectsFromSystem(), ilRepUtil\restoreObjects(), ilObjFileGUI\save(), ilObjFileGUI\update(), ilObjRootFolderGUI\updateObject(), ilObjGroupGUI\updateObject(), ilObjCategoryGUI\updateObject(), and ilObjCourseGUI\updateObject().

56  {
57  global $ilDB;
58 
59  /* see _recordReadEvent
60  if (!ilChangeEvent::_isActive())
61  {
62  return;
63  }
64  */
65 
66  if ($parent_obj_id == null)
67  {
68  $pset = $ilDB->query('SELECT r2.obj_id par_obj_id FROM object_reference r1 '.
69  'JOIN tree t ON t.child = r1.ref_id '.
70  'JOIN object_reference r2 ON r2.ref_id = t.parent '.
71  'WHERE r1.obj_id = '.$ilDB->quote($obj_id,'integer'));
72 
73  while ($prec = $ilDB->fetchAssoc($pset))
74  {
75  $nid = $ilDB->nextId("write_event");
76  $query = sprintf('INSERT INTO write_event '.
77  '(write_id, obj_id, parent_obj_id, usr_id, action, ts) VALUES '.
78  '(%s, %s, %s, %s, %s, '.$ilDB->now().')',
79  $ilDB->quote($nid,'integer'),
80  $ilDB->quote($obj_id,'integer'),
81  $ilDB->quote($prec["par_obj_id"],'integer'),
82  $ilDB->quote($usr_id,'integer'),
83  $ilDB->quote($action,'text'));
84 
85  $aff = $ilDB->manipulate($query);
86  }
87  }
88  else
89  {
90  $nid = $ilDB->nextId("write_event");
91  $query = sprintf('INSERT INTO write_event '.
92  '(write_id, obj_id, parent_obj_id, usr_id, action, ts) '.
93  'VALUES (%s,%s,%s,%s,%s,'.$ilDB->now().')',
94  $ilDB->quote($nid,'integer'),
95  $ilDB->quote($obj_id,'integer'),
96  $ilDB->quote($parent_obj_id,'integer'),
97  $ilDB->quote($usr_id,'integer'),
98  $ilDB->quote($action,'text'));
99  $aff = $ilDB->manipulate($query);
100 
101  }
102  //error_log ('ilChangeEvent::_recordWriteEvent '.$q);
103  }
$ilDB
global $ilDB
Definition: storeScorm2004.php:16
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◆ _syncObjectStats()

ilChangeEvent::_syncObjectStats (   $a_now = null,
  $a_minimum = 20000 
)

Process object statistics log data.

Parameters
integer$a_now
integer$a_minimum

Definition at line 376 of file class.ilChangeEvent.php.

References $ilDB, $row, and ilDB\LOCK_WRITE.

Referenced by ilLPObjectStatisticsGUI\adminSync().

377  {
378  global $ilDB;
379 
380  if(!$a_now)
381  {
382  $a_now = time();
383  }
384 
385  set_time_limit(0);
386 
387  // has source table enough entries?
388  $set = $ilDB->query("SELECT COUNT(*) AS counter FROM obj_stat_log");
389  $row = $ilDB->fetchAssoc($set);
390  if($row["counter"] >= $a_minimum)
391  {
392  // lock source and transfer table
393  $ilDB->lockTables(array(array("name"=>"obj_stat_log", "type"=>ilDB::LOCK_WRITE),
394  array("name"=>"obj_stat_tmp", "type"=>ilDB::LOCK_WRITE)));
395 
396  // if other process was transferring, we had to wait for the lock and
397  // the source table should now have less than minimum/needed entries
398  $set = $ilDB->query("SELECT COUNT(*) AS counter FROM obj_stat_log");
399  $row = $ilDB->fetchAssoc($set);
400  if($row["counter"] >= $a_minimum)
401  {
402  // use only "full" seconds to have a clear cut
403  $ilDB->query("INSERT INTO obj_stat_tmp".
404  " SELECT * FROM obj_stat_log".
405  " WHERE tstamp < ".$ilDB->quote($a_now, "timestamp"));
406 
407  // remove transferred entries from source table
408  $ilDB->query("DELETE FROM obj_stat_log".
409  " WHERE tstamp < ".$ilDB->quote($a_now, "timestamp"));
410 
411  // remove lock from source table
412  $ilDB->unlockTables();
413 
414  // lock transfer and target table (is this needed?)
415  $ilDB->lockTables(array(array("name"=>"obj_stat_tmp", "type"=>ilDB::LOCK_WRITE),
416  array("name"=>"obj_stat", "type"=>ilDB::LOCK_WRITE)));
417 
418  // process log data (timestamp is not needed anymore)
419  $sql = "SELECT obj_id, obj_type, yyyy, mm, dd, hh, SUM(read_count) AS read_count,".
420  " SUM(childs_read_count) AS childs_read_count, SUM(spent_seconds) AS spent_seconds,".
421  " SUM(childs_spent_seconds) AS childs_spent_seconds".
422  " FROM obj_stat_tmp".
423  " GROUP BY obj_id, obj_type, yyyy, mm, dd, hh";
424  $set = $ilDB->query($sql);
425  while($row = $ilDB->fetchAssoc($set))
426  {
427  // "primary key"
428  $where = array("obj_id" => array("integer", $row["obj_id"]),
429  "obj_type" => array("text", $row["obj_type"]),
430  "yyyy" => array("integer", $row["yyyy"]),
431  "mm" => array("integer", $row["mm"]),
432  "dd" => array("integer", $row["dd"]),
433  "hh" => array("integer", $row["hh"]));
434 
435  $where_sql = array();
436  foreach($where as $field => $def)
437  {
438  $where_sql[] = $field." = ".$ilDB->quote($def[1], $def[0]);
439  }
440  $where_sql = implode(" AND ", $where_sql);
441 
442  // existing entry?
443  $check = $ilDB->query("SELECT read_count, childs_read_count, spent_seconds,".
444  "childs_spent_seconds".
445  " FROM obj_stat".
446  " WHERE ".$where_sql);
447  if($ilDB->numRows($check))
448  {
449  $old = $ilDB->fetchAssoc($check);
450 
451  // add existing values
452  $fields = array("read_count" => array("integer", $old["read_count"]+$row["read_count"]),
453  "childs_read_count" => array("integer", $old["childs_read_count"]+$row["childs_read_count"]),
454  "spent_seconds" => array("integer", $old["spent_seconds"]+$row["spent_seconds"]),
455  "childs_spent_seconds" => array("integer", $old["childs_spent_seconds"]+$row["childs_spent_seconds"]));
456 
457  $ilDB->update("obj_stat", $fields, $where);
458  }
459  else
460  {
461  // new entry
462  $fields = $where;
463  $fields["read_count"] = array("integer", $row["read_count"]);
464  $fields["childs_read_count"] = array("integer", $row["childs_read_count"]);
465  $fields["spent_seconds"] = array("integer", $row["spent_seconds"]);
466  $fields["childs_spent_seconds"] = array("integer", $row["childs_spent_seconds"]);
467 
468  $ilDB->insert("obj_stat", $fields);
469  }
470  }
471 
472  // clean up transfer table
473  $ilDB->query("DELETE FROM obj_stat_tmp");
474  }
475 
476  // remove all locks (does not matter if transfer was actually performed)
477  $ilDB->unlockTables();
478  }
479  }
ilDB\LOCK_WRITE
const LOCK_WRITE
Definition: class.ilDB.php:30
$ilDB
global $ilDB
Definition: storeScorm2004.php:16
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◆ _updateAccessForScormOfflinePlayer()

ilChangeEvent::_updateAccessForScormOfflinePlayer (   $obj_id,
  $usr_id,
  $i_last_access,
  $t_first_access 
)

_updateAccessForScormOfflinePlayer needed to synchronize last_access and first_access when learning modul is used offline called in .

/Modules/ScormAicc/classes/class.ilSCORMOfflineMode.php

Returns
true

Definition at line 1010 of file class.ilChangeEvent.php.

References $ilDB, and $res.

Referenced by ilSCORMOfflineMode\scormPlayerUnloadForSop2il().

1010  {
1011  global $ilDB;
1012  $res = $ilDB->queryF('UPDATE read_event SET first_access=%s, last_access = %s WHERE obj_id=%s AND usr_id=%s',
1013  array('timestamp','integer','integer','integer'),
1014  array($t_first_access,$i_last_access,$obj_id,$usr_id)
1015  );
1016  return $res;
1017  }
$ilDB
global $ilDB
Definition: storeScorm2004.php:16
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◆ hasAccessed()

static ilChangeEvent::hasAccessed (   $a_obj_id,
  $a_usr_id 
)
static

Has accessed.

Definition at line 852 of file class.ilChangeEvent.php.

References $ilDB.

Referenced by ilLPStatusDownloaded\_getCompleted(), ilLPStatusVisitedPages\determineStatus(), ilLPStatusQuestions\determineStatus(), ilLPStatusManual\determineStatus(), ilLPStatusVisits\determineStatus(), ilLPStatusTypicalLearningTime\determineStatus(), ilLPStatusExerciseReturned\determineStatus(), ilLPStatusManualByTutor\determineStatus(), ilLPStatusObjectives\determineStatus(), ilLPStatusSCORM\determineStatus(), and ilLPStatusCollection\determineStatus().

853  {
854  global $ilDB;
855 
856  if (isset(self::$has_accessed[$a_obj_id][$a_usr_id]))
857  {
858  return self::$has_accessed[$a_obj_id][$a_usr_id];
859  }
860 
861  $set = $ilDB->query("SELECT usr_id FROM read_event WHERE ".
862  "obj_id = ".$ilDB->quote($a_obj_id, "integer")." AND ".
863  "usr_id = ".$ilDB->quote($a_usr_id, "integer")
864  );
865  if ($rec = $ilDB->fetchAssoc($set))
866  {
867  return self::$has_accessed[$a_obj_id][$a_usr_id] = true;
868  }
869  return self::$has_accessed[$a_obj_id][$a_usr_id] = false;
870  }
$ilDB
global $ilDB
Definition: storeScorm2004.php:16
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◆ lookupUsersInProgress()

static ilChangeEvent::lookupUsersInProgress (   $a_obj_id)
static

Lookup users in progress.

Returns

Definition at line 834 of file class.ilChangeEvent.php.

References $ilDB, $query, $res, and $row.

Referenced by ilLPStatusQuestions\_getCompleted(), ilLPStatusQuestions\_getInProgress(), ilLPStatusVisitedPages\_getInProgress(), ilLPStatusManual\_getInProgress(), ilLPStatusExerciseReturned\_getInProgress(), ilLPStatusCollection\_getInProgress(), ilLPStatusManualByTutor\_getInProgress(), and ilLPStatusObjectives\_getStatusInfo().

835  {
836  global $ilDB;
837 
838  $query = sprintf('SELECT DISTINCT(usr_id) usr FROM read_event '.
839  'WHERE obj_id = %s ',
840  $ilDB->quote($a_obj_id,'integer'));
841  $res = $ilDB->query($query);
842  while($row = $ilDB->fetchObject($res))
843  {
844  $users[] = $row->usr;
845  }
846  return $users ? $users : array();
847  }
$ilDB
global $ilDB
Definition: storeScorm2004.php:16
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Field Documentation

◆ $has_accessed

ilChangeEvent::$has_accessed = array()
staticprivate

Definition at line 38 of file class.ilChangeEvent.php.

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