ilChangeEvent Class Reference

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

Collaboration diagram for ilChangeEvent:

Static Public Member Functions
static	_recordWriteEvent ($obj_id, $usr_id, $action, $parent_obj_id=null)
	Records a write event. More...
static	_recordReadEvent ( $a_type, $a_ref_id, $obj_id, $usr_id, $isCatchupWriteEvents=true, $a_ext_rc=false, $a_ext_time=false)
	Records a read event and catches up with write events. More...
static	_recordObjStats ($a_obj_id, $a_spent_seconds, $a_read_count, $a_childs_spent_seconds=null, $a_child_read_count=null)
static	_syncObjectStats ($a_now=null, $a_minimum=20000)
	Process object statistics log data. More...
static	_catchupWriteEvents ($obj_id, $usr_id, $timestamp=null)
	Catches up with all write events which occured before the specified timestamp. More...
static	_lookupUncaughtWriteEvents ($obj_id, $usr_id)
	Catches up with all write events which occured before the specified timestamp. More...
static	_lookupChangeState ($obj_id, $usr_id)
	Returns the change state of the object for the specified user. More...
static	_lookupReadEvents ($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	_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 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 824 of file class.ilChangeEvent.php.

References $DIC, $ilDB, $ilSetting, $query, $res, and _isActive().

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

    {
        if (ilChangeEvent::_isActive()) {
            return 'change event tracking is already active';
        } else {
            global $DIC;

            $ilDB = $DIC['ilDB'];

            // Insert initial data into table write_event
            // We need to do this here, because we need
            // to catch up write events that occured while the change event tracking was
            // deactivated.

            // IGNORE isn't supported in oracle
            $set = $ilDB->query(sprintf(
                'SELECT r1.obj_id,r2.obj_id p,d.owner,%s,d.create_date ' .
                'FROM object_data d ' .
                'LEFT JOIN write_event w ON d.obj_id = w.obj_id ' .
                'JOIN object_reference r1 ON d.obj_id=r1.obj_id ' .
                'JOIN tree t ON t.child=r1.ref_id ' .
                'JOIN object_reference r2 on r2.ref_id=t.parent ' .
                'WHERE w.obj_id IS NULL',
                $ilDB->quote('create', 'text')
            ));
            while ($rec = $ilDB->fetchAssoc($set)) {
                $nid = $ilDB->nextId("write_event");
                $query = 'INSERT INTO write_event ' .
                    '(write_id, obj_id,parent_obj_id,usr_id,action,ts) VALUES (' .
                    $ilDB->quote($nid, "integer") . "," .
                    $ilDB->quote($rec["obj_id"], "integer") . "," .
                    $ilDB->quote($rec["p"], "integer") . "," .
                    $ilDB->quote($rec["owner"], "integer") . "," .
                    $ilDB->quote("create", "text") . "," .
                    $ilDB->quote($rec["create_date"], "timestamp") .
                    ')';
                $res = $ilDB->query($query);
            }
            
            global $DIC;

            $ilSetting = $DIC['ilSetting'];
            $ilSetting->set('enable_change_event_tracking', '1');

            return $res;
        }
    }

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_catchupWriteEvents()

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

static

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

Parameters

$obj_id	int The object.
$usr_id	int The user.
$timestamp	SQL timestamp.

Definition at line 488 of file class.ilChangeEvent.php.

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

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

    {
        global $DIC;

        $ilDB = $DIC['ilDB'];
        
        $query = "SELECT obj_id FROM catch_write_events " .
            "WHERE obj_id = " . $ilDB->quote($obj_id, 'integer') . " " .
            "AND usr_id  = " . $ilDB->quote($usr_id, 'integer');
        $res = $ilDB->query($query);
        if ($res->numRows()) {
            $ts = ($timestamp == null)
                ? ilUtil::now()
                : $timestamp;
        /*                      $query = "UPDATE catch_write_events ".
                        "SET ts = ".($timestamp == null ? $ilDB->now() : $ilDB->quote($timestamp, 'timestamp'))." ".
                        "WHERE usr_id = ".$ilDB->quote($usr_id ,'integer')." ".
                        "AND obj_id = ".$ilDB->quote($obj_id ,'integer');
                    $res = $ilDB->manipulate($query);*/
        } else {
            $ts = ilUtil::now();
            /*                  $query = "INSERT INTO catch_write_events (ts,obj_id,usr_id) ".
                            "VALUES( ".
                            $ilDB->now().", ".
                            $ilDB->quote($obj_id,'integer').", ".
                            $ilDB->quote($usr_id,'integer')." ".
                            ")";
                        $res = $ilDB->manipulate($query);*/
        }

        // alex, use replace due to bug #10406
        $ilDB->replace(
            "catch_write_events",
            array(
                "obj_id" => array("integer", $obj_id),
                "usr_id" => array("integer", $usr_id)
            ),
            array(
                "ts" => array("timestamp", $ts))
        );
    }

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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 877 of file class.ilChangeEvent.php.

References $DIC, and $ilSetting.

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

    {
        global $DIC;

        $ilSetting = $DIC['ilSetting'];
        $ilSetting->set('enable_change_event_tracking', '0');
    }

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_delete()

static ilChangeEvent::_delete (   $a_obj_id )

static

Delete object entries.

Returns

Definition at line 904 of file class.ilChangeEvent.php.

References $DIC, $ilDB, and $query.

Referenced by ilObjectLP\handleDelete().

    {
        global $DIC;

        $ilDB = $DIC['ilDB'];
        
        $query = sprintf(
            'DELETE FROM write_event WHERE obj_id = %s ',
            $ilDB->quote($a_obj_id, 'integer')
        );
        $aff = $ilDB->manipulate($query);
        
        $query = sprintf(
            'DELETE FROM read_event WHERE obj_id = %s ',
            $ilDB->quote($a_obj_id, 'integer')
        );
        $aff = $ilDB->manipulate($query);
        return true;
    }

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_deleteReadEvents()

static ilChangeEvent::_deleteReadEvents (   $a_obj_id )

static

Definition at line 924 of file class.ilChangeEvent.php.

References $DIC, and $ilDB.

    {
        global $DIC;

        $ilDB = $DIC['ilDB'];
        
        $ilDB->manipulate("DELETE FROM read_event" .
            " WHERE obj_id = " . $ilDB->quote($a_obj_id, "integer"));
    }

_deleteReadEventsForUsers()

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

static

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

References $DIC, and $ilDB.

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

    {
        global $DIC;

        $ilDB = $DIC['ilDB'];
        
        $ilDB->manipulate("DELETE FROM read_event" .
            " WHERE obj_id = " . $ilDB->quote($a_obj_id, "integer") .
            " AND " . $ilDB->in("usr_id", $a_user_ids, "", "integer"));
    }

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_getAllUserIds()

static ilChangeEvent::_getAllUserIds (   $a_obj_id )

static

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

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

Referenced by ilObjectLP\gatherLPUsers().

    {
        global $DIC;

        $ilDB = $DIC['ilDB'];
        
        $res = array();
        
        $set = $ilDB->query("SELECT usr_id FROM read_event" .
            " WHERE obj_id = " . $ilDB->quote($a_obj_id, "integer"));
        while ($row = $ilDB->fetchAssoc($set)) {
            $res[] = $row["usr_id"];
        }

        return $res;
    }

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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 890 of file class.ilChangeEvent.php.

References $DIC, and $ilSetting.

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

    {
        global $DIC;

        $ilSetting = $DIC['ilSetting'];
        return $ilSetting->get('enable_change_event_tracking', '0') == '1';
    }

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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_id	int The object
$usr_id	int The user who is interested into these events.

Returns

0 = object is unchanged, 1 = object is new, 2 = object has changed

Definition at line 634 of file class.ilChangeEvent.php.

References $DIC, $ilDB, $query, $r, $res, $row, and ilDBConstants\FETCHMODE_ASSOC.

Referenced by ilTrackingTest\testChangeEvent().

    {
        global $DIC;

        $ilDB = $DIC['ilDB'];
        
        $q = "SELECT ts " .
            "FROM catch_write_events " .
            "WHERE obj_id=" . $ilDB->quote($obj_id, 'integer') . " " .
            "AND usr_id=" . $ilDB->quote($usr_id, 'integer');
        $r = $ilDB->query($q);
        $catchup = null;
        while ($row = $r->fetchRow(ilDBConstants::FETCHMODE_ASSOC)) {
            $catchup = $row['ts'];
        }

        if ($catchup == null) {
            $ilDB->setLimit(1);
            $query = sprintf(
                'SELECT * FROM write_event ' .
                'WHERE obj_id = %s ' .
                'AND usr_id <> %s ',
                $ilDB->quote($obj_id, 'integer'),
                $ilDB->quote($usr_id, 'integer')
            );
            $res = $ilDB->query($query);
        } else {
            $ilDB->setLimit(1);
            $query = sprintf(
                'SELECT * FROM write_event ' .
                'WHERE obj_id = %s ' .
                'AND usr_id <> %s ' .
                'AND ts > %s ',
                $ilDB->quote($obj_id, 'integer'),
                $ilDB->quote($usr_id, 'integer'),
                $ilDB->quote($catchup, 'timestamp')
            );
            $res = $ilDB->query($query);
        }

        $numRows = $res->numRows();
        if ($numRows > 0) {
            $row = $ilDB->fetchAssoc($res);
            // if we have write events, and user never catched one, report as new (1)
            // if we have write events, and user catched an old write event, report as changed (2)
            return ($catchup == null) ? 1 : 2;
        } else {
            return 0; // user catched all write events, report as unchanged (0)
        }
    }

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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_id	int The object
$usr_id	int The user who is interested into these events. / public static function _lookupUncaughtReadEvents($obj_id, $usr_id) { global $DIC;

$ilDB = $DIC['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(ilDBConstants::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(ilDBConstants::FETCHMODE_ASSOC)) { $events[] = $row; } return $events; } Reads all read events which occured on the object.

Parameters

$obj_id	int The object
$usr_id	int Optional, the user who performed these events.

Definition at line 731 of file class.ilChangeEvent.php.

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

Referenced by ilLPStatusContentVisited\_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().

    {
        global $DIC;

        $ilDB = $DIC['ilDB'];
        
        if ($usr_id == null) {
            $query = sprintf(
                'SELECT * FROM read_event ' .
                'WHERE obj_id = %s ' .
                'ORDER BY last_access DESC',
                $ilDB->quote($obj_id, 'integer')
            );
            $res = $ilDB->query($query);
        } else {
            $query = sprintf(
                'SELECT * FROM read_event ' .
                'WHERE obj_id = %s ' .
                'AND usr_id = %s ' .
                'ORDER BY last_access DESC',
                $ilDB->quote($obj_id, 'integer'),
                $ilDB->quote($usr_id, 'integer')
            );
            $res = $ilDB->query($query);
        }

        $counter = 0;
        while ($row = $ilDB->fetchAssoc($res)) {
            $events[$counter]['obj_id'] = $row['obj_id'];
            $events[$counter]['usr_id'] = $row['usr_id'];
            $events[$counter]['last_access'] = $row['last_access'];
            $events[$counter]['read_count'] = $row['read_count'];
            $events[$counter]['spent_seconds'] = $row['spent_seconds'];
            $events[$counter]['first_access'] = $row['first_access'];
            
            $counter++;
        }
        return $events ? $events : array();
    }

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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_id	int The object.
$usr_id	int The user.
$timestamp	SQL timestamp. / function _catchupReadEvents($obj_id, $usr_id, $timestamp = null) { global $DIC;

$ilDB = $DIC['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_id	int The object
$usr_id	int The user who is interested into these events.

Returns

array with rows from table write_event

Definition at line 579 of file class.ilChangeEvent.php.

References $DIC, $events, $ilDB, $query, $r, $res, $row, and ilDBConstants\FETCHMODE_ASSOC.

Referenced by ilTrackingTest\testChangeEvent().

    {
        global $DIC;

        $ilDB = $DIC['ilDB'];
        
        $q = "SELECT ts " .
            "FROM catch_write_events " .
            "WHERE obj_id=" . $ilDB->quote($obj_id, 'integer') . " " .
            "AND usr_id=" . $ilDB->quote($usr_id, 'integer');
        $r = $ilDB->query($q);
        $catchup = null;
        while ($row = $r->fetchRow(ilDBConstants::FETCHMODE_ASSOC)) {
            $catchup = $row['ts'];
        }
        
        if ($catchup == null) {
            $query = sprintf(
                'SELECT * FROM write_event ' .
                'WHERE obj_id = %s ' .
                'AND usr_id <> %s ' .
                'ORDER BY ts DESC',
                $ilDB->quote($obj_id, 'integer'),
                $ilDB->quote($usr_id, 'integer')
            );
            $res = $ilDB->query($query);
        } else {
            $query = sprintf(
                'SELECT * FROM write_event ' .
                'WHERE obj_id = %s ' .
                'AND usr_id <> %s ' .
                'AND ts >= %s ' .
                'ORDER BY ts DESC',
                $ilDB->quote($obj_id, 'integer'),
                $ilDB->quote($usr_id, 'integer'),
                $ilDB->quote($catchup, 'timestamp')
            );
            $res = $ilDB->query($query);
        }
        $events = array();
        while ($row = $ilDB->fetchAssoc($res)) {
            $events[] = $row;
        }
        return $events;
    }

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_recordObjStats()

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

static

Definition at line 322 of file class.ilChangeEvent.php.

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

    {
        global $DIC;

        $ilDB = $DIC['ilDB'];
        
        if (!ilObjUserTracking::_enabledObjectStatistics() ||
            (int) $a_obj_id <= 0) { // #12706
            return;
        }
        
        $now = time();

        $fields = array();
        $fields['log_id'] = array("integer", $ilDB->nextId('obj_stat_log'));
        $fields["obj_id"] = array("integer", $a_obj_id);
        $fields["obj_type"] = array("text", ilObject::_lookupType($a_obj_id));
        $fields["tstamp"] = array("timestamp", $now);
        $fields["yyyy"] = array("integer", date("Y"));
        $fields["mm"] = array("integer", date("m"));
        $fields["dd"] = array("integer", date("d"));
        $fields["hh"] = array("integer", date("H"));
        if ($a_spent_seconds > 0) {
            $fields["spent_seconds"] = array("integer", $a_spent_seconds);
        }
        if ($a_read_count > 0) {
            $fields["read_count"] = array("integer", $a_read_count);
        }
        if ($a_childs_spent_seconds > 0) {
            $fields["childs_spent_seconds"] = array("integer", $a_childs_spent_seconds);
        }
        if ($a_child_read_count > 0) {
            $fields["childs_read_count"] = array("integer", $a_child_read_count);
        }
        $ilDB->insert("obj_stat_log", $fields);

        // 0.01% probability
        if (mt_rand(1, 100) == 1) {
            self::_syncObjectStats($now);
        }
    }

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_recordReadEvent()

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

static

Records a read event and catches up with write events.

Parameters

$obj_id	int The object which was read.
$usr_id	int The user who performed a read action.
$catchupWriteEvents	boolean If true, this function catches up with write events.

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

References $a_type, $DIC, $ilDB, $path, $query, $res, $row, $time, $time_diff, $tree, _catchupWriteEvents(), ilObjUserTracking\_getValidTimeSpan(), ilObject\_lookupObjId(), and ilObject\_lookupType().

Referenced by ilObjSCORMTracking\_syncReadEvent(), ilSCORM2004Tracking\_syncReadEvent(), ilLearningProgress\_tracProgress(), ilRemoteObjectBaseGUI\callObject(), ilSurveyExecutionGUI\executeCommand(), ilObjMediaCast\handleLPUpdate(), ilObjSCORMLearningModule\importSuccessForSahsUser(), ilWikiPageGUI\increaseViewCount(), ilObjSessionGUI\infoScreen(), ilContainerGUI\performPasteIntoMultipleObjectsObject(), ilObjIndividualAssessmentGUI\recordIndividualAssessmentRead(), ilObjLearningSequenceGUI\recordLearningSequenceRead(), ilObjLinkResourceGUI\redirectToLink(), ilObjPortfolioBaseGUI\renderFullscreenHeader(), ilObjBlogGUI\renderFullscreenHeader(), ilObjFileGUI\sendFile(), ilContainerContentGUI\setOutput(), ilObjMediaCastGUI\showContentObject(), ilObjSCORMTracking\syncGlobalStatus(), ilLMTracker\trackAccess(), ilObjContentPage\trackProgress(), ilObjTestGUI\trackTestObjectReadEvent(), ilCourseContentGUI\view(), and ilObjectGUI\viewObject().

      {
        global $DIC;

        $ilDB = $DIC['ilDB'];
        $tree = $DIC['tree'];
        
        /* read_event data is now used for several features, so we are always keeping track
        if (!ilChangeEvent::_isActive())
        {
            return;
        }
        */
        
        include_once('Services/Tracking/classes/class.ilObjUserTracking.php');
        $validTimeSpan = ilObjUserTracking::_getValidTimeSpan();
        
        $query = sprintf(
            'SELECT * FROM read_event ' .
            'WHERE obj_id = %s ' .
            'AND usr_id = %s ',
            $ilDB->quote($obj_id, 'integer'),
            $ilDB->quote($usr_id, 'integer')
        );
        $res = $ilDB->query($query);
        $row = $ilDB->fetchObject($res);

        // read counter
        if ($a_ext_rc !== false) {
            $read_count = 'read_count = ' . $ilDB->quote($a_ext_rc, "integer") . ", ";
            $read_count_init = max(1, (int) $a_ext_rc);
            $read_count_diff = max(1, (int) $a_ext_rc) - $row->read_count;
        } else {
            $read_count = 'read_count = read_count + 1, ';
            $read_count_init = 1;
            $read_count_diff = 1;
        }
        
        if ($row) {
            if ($a_ext_time !== false) {
                $time = (int) $a_ext_time;
            } else {
                $time = $ilDB->quote((time() - $row->last_access) <= $validTimeSpan
                             ? $row->spent_seconds + time() - $row->last_access
                             : $row->spent_seconds, 'integer');
                
                // if we are in the valid interval, we do not
                // add anything to the read_count, since this is the
                // same access for us
                if ((time() - $row->last_access) <= $validTimeSpan) {
                    $read_count = '';
                    $read_count_init = 1;
                    $read_count_diff = 0;
                }
            }
            $time_diff = $time - (int) $row->spent_seconds;
            
            // Update
            $query = sprintf(
                'UPDATE read_event SET ' .
                $read_count .
                'spent_seconds = %s, ' .
                'last_access = %s ' .
                'WHERE obj_id = %s ' .
                'AND usr_id = %s ',
                $time,
                $ilDB->quote(time(), 'integer'),
                $ilDB->quote($obj_id, 'integer'),
                $ilDB->quote($usr_id, 'integer')
            );
            $aff = $ilDB->manipulate($query);

            self::_recordObjStats($obj_id, $time_diff, $read_count_diff);
        } else {
            if ($a_ext_time !== false) {
                $time = (int) $a_ext_time;
            } else {
                $time = 0;
            }

            $time_diff = $time - (int) $row->spent_seconds;
            
            /*
            $query = sprintf('INSERT INTO read_event (obj_id,usr_id,last_access,read_count,spent_seconds,first_access) '.
                'VALUES (%s,%s,%s,%s,%s,'.$ilDB->now().') ',
                $ilDB->quote($obj_id,'integer'),
                $ilDB->quote($usr_id,'integer'),
                $ilDB->quote(time(),'integer'),
                $ilDB->quote($read_count_init,'integer'),
                $ilDB->quote($time,'integer'));
            $ilDB->manipulate($query);
            */
            
            // #10407
            $ilDB->replace(
                'read_event',
                array(
                    'obj_id' => array('integer', $obj_id),
                    'usr_id' => array('integer', $usr_id)
                ),
                array(
                    'read_count' => array('integer', $read_count_init),
                    'spent_seconds' => array('integer', $time),
                    'first_access' => array('timestamp', date("Y-m-d H:i:s")), // was $ilDB->now()
                    'last_access' => array('integer', time())
                )
            );
            
            self::$has_accessed[$obj_id][$usr_id] = true;

            self::_recordObjStats($obj_id, $time_diff, $read_count_diff);
        }
        
        if ($isCatchupWriteEvents) {
            ilChangeEvent::_catchupWriteEvents($obj_id, $usr_id);
        }

        // update parents (no categories or root)
        if (!in_array($a_type, array("cat", "root", "crs"))) {
            if ($tree->isInTree($a_ref_id)) {
                $path = $tree->getPathId($a_ref_id);

                foreach ($path as $p) {
                    $obj2_id = ilObject::_lookupObjId($p);
                    $obj2_type = ilObject::_lookupType($obj2_id);
                    //echo "<br>1-$obj2_type-$p-$obj2_id-";
                    if (($p != $a_ref_id) && (in_array($obj2_type, array("crs", "fold", "grp", "lso")))) {
                        $query = sprintf(
                            'SELECT * FROM read_event ' .
                            'WHERE obj_id = %s ' .
                            'AND usr_id = %s ',
                            $ilDB->quote($obj2_id, 'integer'),
                            $ilDB->quote($usr_id, 'integer')
                        );
                        $res2 = $ilDB->query($query);
                        if ($row2 = $ilDB->fetchAssoc($res2)) {
                            //echo "<br>2";
                            // update read count and spent seconds
                            $query = sprintf(
                                'UPDATE read_event SET ' .
                                'childs_read_count = childs_read_count + %s ,' .
                                'childs_spent_seconds = childs_spent_seconds + %s ' .
                                'WHERE obj_id = %s ' .
                                'AND usr_id = %s ',
                                $ilDB->quote((int) $read_count_diff, 'integer'),
                                $ilDB->quote((int) $time_diff, 'integer'),
                                $ilDB->quote($obj2_id, 'integer'),
                                $ilDB->quote($usr_id, 'integer')
                            );
                            $aff = $ilDB->manipulate($query);

                            self::_recordObjStats($obj2_id, null, null, (int) $time_diff, (int) $read_count_diff);
                        } else {
                            //echo "<br>3";
                            //$ilLog->write("insert read event for obj_id -".$obj2_id."-".$usr_id."-");
                            /*
                            $query = sprintf('INSERT INTO read_event (obj_id,usr_id,last_access,read_count,spent_seconds,first_access,'.
                                'childs_read_count, childs_spent_seconds) '.
                                'VALUES (%s,%s,%s,%s,%s,'.$ilDB->now().', %s, %s) ',
                                $ilDB->quote($obj2_id,'integer'),
                                $ilDB->quote($usr_id,'integer'),
                                $ilDB->quote(time(),'integer'),
                                $ilDB->quote(1,'integer'),
                                $ilDB->quote($time,'integer'),
                                $ilDB->quote((int) $read_count_diff,'integer'),
                                $ilDB->quote((int) $time_diff,'integer')
                                );
                            $aff = $ilDB->manipulate($query);
                            */
                            
                            // #10407
                            $ilDB->replace(
                                'read_event',
                                array(
                                    'obj_id' => array('integer', $obj2_id),
                                    'usr_id' => array('integer', $usr_id)
                                ),
                                array(
                                    'read_count' => array('integer', 1),
                                    'spent_seconds' => array('integer', $time),
                                    'first_access' => array('timestamp', date("Y-m-d H:i:s")), // was $ilDB->now()
                                    'last_access' => array('integer', time()),
                                    'childs_read_count' => array('integer', (int) $read_count_diff),
                                    'childs_spent_seconds' => array('integer', (int) $time_diff)
                                )
                            );
                            
                            self::$has_accessed[$obj2_id][$usr_id] = true;
                            
                            self::_recordObjStats($obj2_id, $time, 1, (int) $time_diff, (int) $read_count_diff);
                        }
                    }
                }
            }
        }

        // @todo:
        // - calculate diff of spent_seconds and read_count
        // - use ref id to get parents of types grp, crs, fold
        // - add diffs to childs_spent_seconds and childs_read_count
    }

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_recordWriteEvent()

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

static

Records a write event.

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

Parameters

$obj_id	int The object which was written to.
$usr_id	int The user who performed a write action.
$action	string The name of the write action. 'create', 'update', 'delete', 'add', 'remove', 'undelete'.
$parent_obj_id	int 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 $action, $DIC, $ilDB, and $query.

Referenced by ilObjCourseGUI\afterSave(), ilObjRootFolderGUI\getEditFormValues(), ilContainerGUI\pasteObject(), ilContainerGUI\performPasteIntoMultipleObjectsObject(), ilObject2GUI\putObjectInTree(), ilObjectGUI\putObjectInTree(), ilRepUtil\removeObjectsFromSystem(), ilRepUtil\restoreObjects(), ilObjFileGUI\save(), ilObjFileGUI\update(), ilObjGroupGUI\updateObject(), ilObjCourseGUI\updateObject(), ilObjCategoryGUI\updateObject(), and ilObjFileGUI\uploadFiles().

    {
        global $DIC;

        $ilDB = $DIC['ilDB'];
        
        /* see _recordReadEvent
        if (!ilChangeEvent::_isActive())
        {
            return;
        }
        */
        
        if ($parent_obj_id == null) {
            $pset = $ilDB->query('SELECT r2.obj_id par_obj_id FROM object_reference r1 ' .
                'JOIN tree t ON t.child = r1.ref_id ' .
                'JOIN object_reference r2 ON r2.ref_id = t.parent ' .
                'WHERE r1.obj_id = ' . $ilDB->quote($obj_id, 'integer'));
            
            while ($prec = $ilDB->fetchAssoc($pset)) {
                $nid = $ilDB->nextId("write_event");
                $query = sprintf(
                    'INSERT INTO write_event ' .
                    '(write_id, obj_id, parent_obj_id, usr_id, action, ts) VALUES ' .
                    '(%s, %s, %s, %s, %s, ' . $ilDB->now() . ')',
                    $ilDB->quote($nid, 'integer'),
                    $ilDB->quote($obj_id, 'integer'),
                    $ilDB->quote($prec["par_obj_id"], 'integer'),
                    $ilDB->quote($usr_id, 'integer'),
                    $ilDB->quote($action, 'text')
                );

                $aff = $ilDB->manipulate($query);
            }
        } else {
            $nid = $ilDB->nextId("write_event");
            $query = sprintf(
                'INSERT INTO write_event ' .
                '(write_id, obj_id, parent_obj_id, usr_id, action, ts) ' .
                'VALUES (%s,%s,%s,%s,%s,' . $ilDB->now() . ')',
                $ilDB->quote($nid, 'integer'),
                $ilDB->quote($obj_id, 'integer'),
                $ilDB->quote($parent_obj_id, 'integer'),
                $ilDB->quote($usr_id, 'integer'),
                $ilDB->quote($action, 'text')
            );
            $aff = $ilDB->manipulate($query);
        }
    }

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_syncObjectStats()

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

static

Process object statistics log data.

Parameters

integer	$a_now
integer	$a_minimum

Definition at line 370 of file class.ilChangeEvent.php.

References $def, $DIC, $ilDB, $ret, $row, ilDBInterface\buildAtomQuery(), ilDBInterface\fetchAssoc(), ilDBInterface\insert(), ilDBInterface\numRows(), ilDBInterface\query(), ilDBInterface\quote(), and ilDBInterface\update().

Referenced by ilLPObjectStatisticsGUI\adminSync().

    {
        global $DIC;

        $ilDB = $DIC['ilDB'];
        
        if (!$a_now) {
            $a_now = time();
        }

        set_time_limit(0);

        // has source table enough entries?
        $set = $ilDB->query("SELECT COUNT(*) AS counter FROM obj_stat_log");
        $row = $ilDB->fetchAssoc($set);
        if ($row["counter"] >= $a_minimum) {
            $ilAtomQuery = $ilDB->buildAtomQuery();
            $ilAtomQuery->addTableLock('obj_stat_log');
            $ilAtomQuery->addTableLock('obj_stat_tmp');

            $ilAtomQuery->addQueryCallable(function (ilDBInterface $ilDB) use ($a_now, $a_minimum, &$ret) {

                // if other process was transferring, we had to wait for the lock and
                // the source table should now have less than minimum/needed entries
                $set = $ilDB->query("SELECT COUNT(*) AS counter FROM obj_stat_log");
                $row = $ilDB->fetchAssoc($set);
                if ($row["counter"] >= $a_minimum) {
                    // use only "full" seconds to have a clear cut
                    $ilDB->query("INSERT INTO obj_stat_tmp" .
                        " SELECT * FROM obj_stat_log" .
                        " WHERE tstamp < " . $ilDB->quote($a_now, "timestamp"));

                    // remove transferred entries from source table
                    $ilDB->query("DELETE FROM obj_stat_log" .
                        " WHERE tstamp < " . $ilDB->quote($a_now, "timestamp"));

                    $ret = true;
                } else {
                    $ret = false;
                }
            });

            $ilAtomQuery->run();

            //continue only if obj_stat_log counter >= $a_minimum
            if ($ret) {
                $ilAtomQuery = $ilDB->buildAtomQuery();
                $ilAtomQuery->addTableLock('obj_stat_tmp');
                $ilAtomQuery->addTableLock('obj_stat');

                $ilAtomQuery->addQueryCallable(function (ilDBInterface $ilDB) use ($a_now, $a_minimum) {

                    // process log data (timestamp is not needed anymore)
                    $sql = "SELECT obj_id, obj_type, yyyy, mm, dd, hh, SUM(read_count) AS read_count," .
                        " SUM(childs_read_count) AS childs_read_count, SUM(spent_seconds) AS spent_seconds," .
                        " SUM(childs_spent_seconds) AS childs_spent_seconds" .
                        " FROM obj_stat_tmp" .
                        " GROUP BY obj_id, obj_type, yyyy, mm, dd, hh";
                    $set = $ilDB->query($sql);
                    while ($row = $ilDB->fetchAssoc($set)) {
                        // "primary key"
                        $where = array("obj_id" => array("integer", $row["obj_id"]),
                            "obj_type" => array("text", $row["obj_type"]),
                            "yyyy" => array("integer", $row["yyyy"]),
                            "mm" => array("integer", $row["mm"]),
                            "dd" => array("integer", $row["dd"]),
                            "hh" => array("integer", $row["hh"]));

                        $where_sql = array();
                        foreach ($where as $field => $def) {
                            $where_sql[] = $field . " = " . $ilDB->quote($def[1], $def[0]);
                        }
                        $where_sql = implode(" AND ", $where_sql);

                        // existing entry?
                        $check = $ilDB->query("SELECT read_count, childs_read_count, spent_seconds," .
                            "childs_spent_seconds" .
                            " FROM obj_stat" .
                            " WHERE " . $where_sql);
                        if ($ilDB->numRows($check)) {
                            $old = $ilDB->fetchAssoc($check);

                            // add existing values
                            $fields = array("read_count" => array("integer", $old["read_count"] + $row["read_count"]),
                                "childs_read_count" => array("integer", $old["childs_read_count"] + $row["childs_read_count"]),
                                "spent_seconds" => array("integer", $old["spent_seconds"] + $row["spent_seconds"]),
                                "childs_spent_seconds" => array("integer", $old["childs_spent_seconds"] + $row["childs_spent_seconds"]));

                            $ilDB->update("obj_stat", $fields, $where);
                        } else {
                            // new entry
                            $fields = $where;
                            $fields["read_count"] = array("integer", $row["read_count"]);
                            $fields["childs_read_count"] = array("integer", $row["childs_read_count"]);
                            $fields["spent_seconds"] = array("integer", $row["spent_seconds"]);
                            $fields["childs_spent_seconds"] = array("integer", $row["childs_spent_seconds"]);

                            $ilDB->insert("obj_stat", $fields);
                        }
                    }

                    // clean up transfer table
                    $ilDB->query("DELETE FROM obj_stat_tmp");
                });

                $ilAtomQuery->run();
            }
        }
    }

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_updateAccessForScormOfflinePlayer()

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

static

_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 968 of file class.ilChangeEvent.php.

References $DIC, $ilDB, and $res.

Referenced by ilSCORMOfflineMode\scormPlayerUnloadForSop2il().

    {
        global $DIC;

        $ilDB = $DIC['ilDB'];
        $res = $ilDB->queryF(
            'UPDATE read_event SET first_access=%s, last_access = %s WHERE obj_id=%s AND usr_id=%s',
            array('timestamp','integer','integer','integer'),
            array($t_first_access,$i_last_access,$obj_id,$usr_id)
        );
        return $res;
    }

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hasAccessed()

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

static

Has accessed.

Definition at line 798 of file class.ilChangeEvent.php.

References $DIC, and $ilDB.

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

    {
        global $DIC;

        $ilDB = $DIC['ilDB'];
     
        if (isset(self::$has_accessed[$a_obj_id][$a_usr_id])) {
            return self::$has_accessed[$a_obj_id][$a_usr_id];
        }

        $set = $ilDB->query(
            "SELECT usr_id FROM read_event WHERE " .
            "obj_id = " . $ilDB->quote($a_obj_id, "integer") . " AND " .
            "usr_id = " . $ilDB->quote($a_usr_id, "integer")
        );
        if ($rec = $ilDB->fetchAssoc($set)) {
            return self::$has_accessed[$a_obj_id][$a_usr_id] = true;
        }
        return self::$has_accessed[$a_obj_id][$a_usr_id] = false;
    }

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lookupUsersInProgress()

static ilChangeEvent::lookupUsersInProgress (   $a_obj_id )

static

Lookup users in progress.

Returns

Definition at line 777 of file class.ilChangeEvent.php.

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

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

    {
        global $DIC;

        $ilDB = $DIC['ilDB'];
        
        $query = sprintf(
            'SELECT DISTINCT(usr_id) usr FROM read_event ' .
            'WHERE obj_id = %s ',
            $ilDB->quote($a_obj_id, 'integer')
        );
        $res = $ilDB->query($query);
        while ($row = $ilDB->fetchObject($res)) {
            $users[] = $row->usr;
        }
        return $users ? $users : array();
    }

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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:

• Services/Tracking/classes/class.ilChangeEvent.php