+ // wvCanModify (weekViewCanModify) - determines if an already existing tt_log record
+ // can be modified with a new user-provided duration.
+ static function wvCanModify($tt_log_id, $new_duration, $err) {
+ global $i18n;
+ $mdb2 = getConnection();
+
+ // Determine if we have start time in record, as further checking does not makes sense otherwise.
+ $sql = "select user_id, date, start, duration from tt_log where id = $tt_log_id";
+ $res = $mdb2->query($sql);
+ if (!is_a($res, 'PEAR_Error')) {
+ if (!$res->numRows()) {
+ $err->add($i18n->getKey('error.db')); // This is not expected.
+ return false;
+ }
+ $val = $res->fetchRow();
+ $oldDuration = $val['duration'];
+ if (!$val['start'])
+ return true; // There is no start time in the record, therefore safe to modify.
+ }
+
+ // We do have start time.
+ // Quick test if new duration is less then already existing.
+ $newMinutes = ttTimeHelper::toMinutes($new_duration);
+ $oldMinutes = ttTimeHelper::toMinutes($oldDuration);
+ if ($newMinutes < $oldMinutes)
+ return true; // Safe to modify.
+
+ // Does the new duration put the record beyond 24:00 boundary?
+ $startMinutes = ttTimeHelper::toMinutes($val['start']);
+ $newEndMinutes = $startMinutes + $newMinutes;
+ if ($newEndMinutes > 1440) {
+ // Invalid duration, as new duration puts the record beyond current day.
+ $err->add($i18n->getKey('error.field'), $i18n->getKey('label.duration'));
+ return false;
+ }
+
+ // Does the new duration causes the record to overlap with others?
+ $user_id = $val['user_id'];
+ $date = $val['date'];
+ $startMinutes = ttTimeHelper::toMinutes($val['start']);
+ $start = ttTimeHelper::toAbsDuration($startMinutes);
+ $finish = ttTimeHelper::toAbsDuration($newEndMinutes);
+ if (ttTimeHelper::overlaps($user_id, $date, $start, $finish, $tt_log_id)) {
+ $err->add($i18n->getKey('error.overlap'));
+ return false;
+ }
+
+ return true; // There are no conflicts, safe to modify.
+ }
+