class.ilLPStatusCollectionMobs.php

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<?php
/* Copyright (c) 1998-2015 ILIAS open source, Extended GPL, see docs/LICENSE */

require_once 'Services/Tracking/classes/class.ilLPStatus.php';
require_once 'Services/Tracking/classes/class.ilLearningProgress.php';

class ilLPStatusCollectionMobs extends ilLPStatus
{       
        public static function _getInProgress($a_obj_id)
        {               
                $users = array();
                
                $status_info = ilLPStatusWrapper::_getStatusInfo($a_obj_id);
                if(is_array($status_info["user_status"]["in_progress"]))
                {
                        $users = $status_info["user_status"]["in_progress"];
                }
                
                return $users;
        }

        public static function _getCompleted($a_obj_id)
        {               
                $users = array();
                
                $status_info = ilLPStatusWrapper::_getStatusInfo($a_obj_id);
                if(is_array($status_info["user_status"]["completed"]))
                {
                        $users = $status_info["user_status"]["completed"];
                }
                
                return $users;
        }
        
        public static function _getStatusInfo($a_parent_obj_id)
        {
                global $ilDB;
                
                $res = array();
                
                $coll_items = self::getCollectionItems($a_parent_obj_id, true);
                
                $res["items"] = array_keys($coll_items);
                if(sizeof($res["items"]))                                                                       
                {                       
                        // titles
                        foreach($coll_items as $mob_id => $item)
                        {
                                $res["item_titles"][$mob_id] = $item["title"];
                        }       
                        
                        // status per item
                        foreach($res["items"] as $mob_id)
                        {
                                $res["completed"][$mob_id] = array();
                                $res["in_progress"][$mob_id] = array(); 
                        }
                        
                        $set = $ilDB->query("SELECT obj_id, usr_id FROM read_event".
                                " WHERE ".$ilDB->in("obj_id", $res["items"], "", "integer"));
                        while($row = $ilDB->fetchAssoc($set))
                        {
                                $res["completed"][$row["obj_id"]][] = $row["usr_id"]; 
                        }
                        
                        // status per user
                        $tmp = array();
                        foreach($res["items"] as $mob_id)
                        {
                                foreach($res["completed"][$mob_id] as $user_id)
                                {
                                        $tmp[$user_id][] = $mob_id;
                                }
                        }
                        foreach($tmp as $user_id => $completed_items)
                        {
                                if(sizeof($completed_items) == sizeof($res["items"]))
                                {
                                        $res["user_status"]["completed"][] = $user_id;
                                }
                                else
                                {
                                        $res["user_status"]["in_progress"][] = $user_id;
                                }
                        }
                }
                
                return $res;
        }
        
        protected static function getCollectionItems($a_obj_id, $a_include_titles = false)
        {
                $res = array();
                
                include_once './Services/Object/classes/class.ilObjectLP.php';
                $olp = ilObjectLP::getInstance($a_obj_id);
                $collection = $olp->getCollectionInstance();
                if($collection)
                {               
                        $possible = $collection->getPossibleItems();
                                
                        // there could be invalid items in the selection                        
                        $valid = array_intersect($collection->getItems(), 
                                array_keys($possible));
                        
                        if($a_include_titles)
                        {
                                foreach($valid as $item_id)
                                {
                                        $res[$item_id] = $possible[$item_id];
                                }
                        }
                        else
                        {
                                $res = $valid;
                        }
                }               
                
                return $res;
        }
        
        public function determineStatus($a_obj_id, $a_user_id, $a_obj = null)
        {               
                global $ilDB;
                
                $status = self::LP_STATUS_NOT_ATTEMPTED_NUM;
                                                
                // an empty collection is always not attempted
                $items = self::getCollectionItems($a_obj_id);
                if(sizeof($items))                                                                      
                {                               
                        // process mob status for user
                                                                        
                        $found = array();
                        
                        $set = $ilDB->query("SELECT obj_id FROM read_event".
                                " WHERE usr_id = ".$ilDB->quote($a_user_id, "integer").
                                " AND ".$ilDB->in("obj_id", $items, "", "integer"));
                        while($row = $ilDB->fetchAssoc($set))
                        {
                                $found[] = $row["obj_id"];
                        }
                                        
                        if(sizeof($found))
                        {
                                $status = self::LP_STATUS_IN_PROGRESS_NUM;
                                
                                if(sizeof($found) == sizeof($items))
                                {
                                        $status = self::LP_STATUS_COMPLETED_NUM;
                                }
                        }                       
                }
                
                return $status;
        }
}