Save duration instead of calculation of start/end date see BT#14161

- Bug appears, when I start exercise today, then I resume tomorrow,
the total time will be more than 24 hours, this is wrong.
I was only 5 min in the exercise.

main/lp/learnpathItem.class.php

@@ -3920,24 +3920,16 @@ class learnpathItem
                         if (!empty($_REQUEST['exeId'])) {
                             $table = Database::get_main_table(TABLE_STATISTIC_TRACK_E_EXERCISES);
                             $exeId = (int) $_REQUEST['exeId'];
-                            $sql = "SELECT start_date, exe_date
+                            $sql = "SELECT exe_duration
                                     FROM $table
                                     WHERE exe_id = $exeId";
                             if ($debug) {
                                 error_log($sql);
                             }
                             $res = Database::query($sql);
-                            $row_dates = Database::fetch_array($res);
+                            $exeRow = Database::fetch_array($res);
-
+                            $duration = $exeRow['exe_duration'];
-                            $time_start_date = convert_sql_date(
+                            $total_time = " total_time = ".$duration.", ";
-                                $row_dates['start_date']
-                            );
-                            $time_exe_date = convert_sql_date(
-                                $row_dates['exe_date']
-                            );
-                            $mytime = ((int) $time_exe_date - (int) $time_start_date);
-                            $mytime = $this->fixAbusiveTime($mytime);
-                            $total_time = " total_time = ".$mytime.", ";
                             if ($debug) {
                                 error_log("quiz: $total_time");
                             }

main/lp/lp_view.php

@@ -276,16 +276,13 @@ if (!empty($_REQUEST['exeId']) &&
     if ($safe_id == strval(intval($safe_id)) &&
         $safe_item_id == strval(intval($safe_item_id))
     ) {
-        $sql = 'SELECT start_date, exe_date, exe_result, exe_weighting, exe_exo_id
+        $sql = 'SELECT start_date, exe_date, exe_result, exe_weighting, exe_exo_id, exe_duration
                 FROM '.$TBL_TRACK_EXERCICES.'
                 WHERE exe_id = '.$safe_exe_id;
         $res = Database::query($sql);
         $row_dates = Database::fetch_array($res);
 
-        $time_start_date = api_strtotime($row_dates['start_date'], 'UTC');
+        $duration = (int) $row_dates['exe_duration'];
-        $time_exe_date = api_strtotime($row_dates['exe_date'], 'UTC');
-
-        $mytime = (int) $time_exe_date - (int) $time_start_date;
         $score = (float) $row_dates['exe_result'];
         $max_score = (float) $row_dates['exe_weighting'];
 
@@ -326,7 +323,7 @@ if (!empty($_REQUEST['exeId']) &&
             $sql = "UPDATE $TBL_LP_ITEM_VIEW SET
                         status = '$status',
                         score = $score,
-                        total_time = $mytime
+                        total_time = $duration
                     WHERE iid = $lp_item_view_id";
             if ($debug) {
                 error_log($sql);