public function doAction()
 {
     if ($this->jsonError !== JSON_ERROR_NONE) {
         $this->result["code"] = $this->jsonError;
         $msg = "Unknown error";
         switch ($this->jsonError) {
             case JSON_ERROR_NONE:
                 // No error has occurred
                 break;
             case JSON_ERROR_DEPTH:
                 $msg = "The maximum stack depth has been exceeded";
                 break;
             case JSON_ERROR_STATE_MISMATCH:
                 $msg = "Invalid or malformed JSON";
                 break;
             case JSON_ERROR_CTRL_CHAR:
                 $msg = "Control character error, possibly incorrectly encoded";
                 break;
             case JSON_ERROR_SYNTAX:
                 $msg = "Syntax error";
                 break;
             case JSON_ERROR_UTF8:
                 $msg = "Malformed UTF-8 characters, possibly incorrectly encoded";
                 break;
         }
         $this->result["errors"][] = array("code" => -1, "message" => "Unexcpected JSON decode error: '{$msg}'");
         log::doLog("CASMACAT: saveLogChunkController->doAction(): Unexcpected JSON decode error: '{$msg}', logList: '" . print_r($this->logList, true) . "'");
         return;
     }
     $db = Database::obtain();
     $db->query("SET AUTOCOMMIT=0");
     $db->query("START TRANSACTION");
     try {
         $eventCount = count($this->logList);
         log::doLog("CASMACAT: saveLogChunkController->doAction(): Processing of logList containing '" . $eventCount . "' elements...");
         if (!is_array($this->logList)) {
             log::doLog("CASMACAT: saveLogChunkController->doAction(): Not an array: '" . print_r($this->logList, true) . "'.");
             throw new Exception("CASMACAT: saveLogChunkController->doAction(): Not an array: '" . print_r($this->logList, true) . "'.");
         }
         // TODO how about transactions?
         foreach ($this->logList as $key => $value) {
             //                $value = (object) $value;
             $logEvent = new LogEvent($this->jobId, $this->fileId, $value);
             switch ($logEvent->type) {
                 case LogEvent::START_SESSION:
                     insertLogEventHeader($logEvent);
                     break;
                 case LogEvent::STOP_SESSION:
                     insertLogEventHeader($logEvent);
                     break;
                 case LogEvent::RESIZE:
                     $logEvent->resizeData($value);
                     insertResizeEvent($logEvent);
                     break;
                 case LogEvent::TEXT:
                     $logEvent->textData($value);
                     insertTextEvent($logEvent);
                     break;
                 case LogEvent::SELECTION:
                     $logEvent->selectionData($value);
                     insertSelectionEvent($logEvent);
                     break;
                 case LogEvent::SCROLL:
                     $logEvent->scrollData($value);
                     insertScrollEvent($logEvent);
                     break;
                 case LogEvent::GAZE:
                     $logEvent->gazeData($value);
                     insertGazeEvent($logEvent);
                     break;
                 case LogEvent::FIXATION:
                     $logEvent->fixationData($value);
                     insertFixationEvent($logEvent);
                     break;
                 case LogEvent::DRAFTED:
                 case LogEvent::TRANSLATED:
                 case LogEvent::APPROVED:
                 case LogEvent::REJECTED:
                     insertLogEventHeader($logEvent);
                     break;
                 case LogEvent::VIEWPORT_TO_SEGMENT:
                     insertLogEventHeader($logEvent);
                     break;
                 case LogEvent::SOURCE_COPIED:
                     insertLogEventHeader($logEvent);
                     break;
                 case LogEvent::SEGMENT_OPENED:
                     insertLogEventHeader($logEvent);
                     break;
                 case LogEvent::SEGMENT_CLOSED:
                     insertLogEventHeader($logEvent);
                     break;
                 case LogEvent::LOADING_SUGGESTIONS:
                     insertLogEventHeader($logEvent);
                     break;
                 case LogEvent::SUGGESTIONS_LOADED:
                     $logEvent->suggestionsLoadedData($value);
                     insertSuggestionsLoadedEvent($logEvent);
                     break;
                 case LogEvent::SUGGESTION_CHOSEN:
                     $logEvent->suggestionChosenData($value);
                     insertSuggestionChosenEvent($logEvent);
                     break;
                 case LogEvent::DELETING_SUGGESTION:
                     $logEvent->deletingSuggestionData($value);
                     insertDeletingSuggestionEvent($logEvent);
                     break;
                 case LogEvent::SUGGESTION_DELETED:
                     insertLogEventHeader($logEvent);
                     break;
                 case LogEvent::STATS_UPDATED:
                     $logEvent->statsUpdatedData($value);
                     insertStatsUpdatedEvent($logEvent);
                     break;
                 case LogEvent::DECODE:
                 case LogEvent::ALIGNMENTS:
                 case LogEvent::SUFFIX_CHANGE:
                 case LogEvent::CONFIDENCES:
                 case LogEvent::TOKENS:
                 case LogEvent::SHOW_ALIGNMENT_BY_KEY:
                 case LogEvent::HIDE_ALIGNMENT_BY_KEY:
                     $logEvent->itpData($value);
                     insertItpEvent($logEvent);
                     break;
                 case LogEvent::SHOW_ALIGNMENT_BY_MOUSE:
                 case LogEvent::HIDE_ALIGNMENT_BY_MOUSE:
                     insertLogEventHeader($logEvent);
                     break;
                 case LogEvent::KEY_DOWN:
                 case LogEvent::KEY_UP:
                     $logEvent->keyData($value);
                     insertKeyEvent($logEvent);
                     break;
                 case LogEvent::MOUSE_DOWN:
                 case LogEvent::MOUSE_UP:
                 case LogEvent::MOUSE_CLICK:
                 case LogEvent::MOUSE_MOVE:
                     $logEvent->mouseData($value);
                     insertMouseEvent($logEvent);
                     break;
                 case LogEvent::BEFORE_CUT:
                 case LogEvent::BEFORE_COPY:
                 case LogEvent::BEFORE_PASTE:
                     insertLogEventHeader($logEvent);
                     break;
                 case LogEvent::VIS_MENU_DISPLAYED:
                 case LogEvent::VIS_MENU_HIDDEN:
                     insertLogEventHeader($logEvent);
                     break;
                 case LogEvent::INITIAL_CONFIG:
                 case LogEvent::CONFIG_CHANGED:
                     $logEvent->configData($value);
                     insertConfigEvent($logEvent);
                     break;
                 case LogEvent::MOUSE_WHEEL_DOWN:
                 case LogEvent::MOUSE_WHEEL_UP:
                 case LogEvent::MOUSE_WHEEL_INVALIDATE:
                     insertLogEventHeader($logEvent);
                     break;
                 case LogEvent::MEMENTO_UNDO:
                 case LogEvent::MEMENTO_REDO:
                 case LogEvent::MEMENTO_INVALIDATE:
                     insertLogEventHeader($logEvent);
                     break;
                 case LogEvent::SR_MENU_DISPLAYED:
                 case LogEvent::SR_MENU_HIDDEN:
                 case LogEvent::SR_MATCH_CASE_ON:
                 case LogEvent::SR_MATCH_CASE_OFF:
                 case LogEvent::SR_REG_EXP_ON:
                 case LogEvent::SR_REG_EXP_OFF:
                 case LogEvent::SR_RULES_SETTING:
                     insertLogEventHeader($logEvent);
                     break;
                 case LogEvent::SR_RULES_SET:
                     $logEvent->srRulesSetData($value);
                     insertSrEvent($logEvent);
                     break;
                 case LogEvent::SR_RULES_APPLIED:
                 case LogEvent::SR_RULE_DELETED:
                     insertLogEventHeader($logEvent);
                     break;
                     // merc - adding float prediction, biconcordancer and translation_option
                 // merc - adding float prediction, biconcordancer and translation_option
                 case LogEvent::FLOAT_PREDICTION:
                     insertLogEventHeader($logEvent);
                     break;
                 case LogEvent::BICONCOR:
                     $logEvent->biconcorData($value);
                     insertBiconcorEvent($logEvent);
                     break;
                 case LogEvent::BICONCOR_CLOSED:
                     insertLogEventHeader($logEvent);
                     break;
                 case LogEvent::TRANSLATION_OPTION:
                     insertLogEventHeader($logEvent);
                     break;
                     // merc - adding epen
                 // merc - adding epen
                 case LogEvent::EPEN_OPENED:
                     insertLogEventHeader($logEvent);
                     break;
                 case LogEvent::EPEN_CLOSED:
                     insertLogEventHeader($logEvent);
                     break;
                 case LogEvent::HTR_RESULT:
                     $logEvent->epenData($value);
                     insertEpenEvent($logEvent);
                     break;
                 case LogEvent::HTR_UPDATE:
                     $logEvent->epenData($value);
                     insertEpenEvent($logEvent);
                     break;
                 case LogEvent::HTR_NBEST_CLICK:
                     $logEvent->epenData($value);
                     insertEpenEvent($logEvent);
                     break;
                 case LogEvent::HTR_TEXT_CHANGE:
                     $logEvent->epenData($value);
                     insertEpenEvent($logEvent);
                     break;
                 case LogEvent::HTR_START:
                     $logEvent->epenData($value);
                     insertEpenEvent($logEvent);
                     break;
                 case LogEvent::HTR_ADD_STROKE:
                     $logEvent->epenData($value);
                     insertEpenEvent($logEvent);
                     break;
                 case LogEvent::HTR_END:
                     $logEvent->epenData($value);
                     insertEpenEvent($logEvent);
                     break;
                 case LogEvent::HTR_GESTURE:
                     $logEvent->epenData($value);
                     insertEpenEvent($logEvent);
                     break;
                     // merc - blur/focus
                 // merc - blur/focus
                 case LogEvent::BLUR:
                     insertLogEventHeader($logEvent);
                     break;
                 case LogEvent::FOCUS:
                     insertLogEventHeader($logEvent);
                     break;
                 default:
                     //                        $db->query("COMMIT");   // at least, store what was ok
                     //                        $db->query("SET AUTOCOMMIT=1");
                     //                        $this->result["executionTime"] = time() - $this->startTime;
                     $this->result["code"] = -1;
                     $this->result["errors"][] = array("code" => -1, "message" => "Unknown log event type: '{$logEvent->type}' at index: '{$key}'");
                     log::doLog("CASMACAT: saveLogChunkController->doAction(): '{$logEvent->type}' at index: '{$key}'");
                     //                    throw new Exception("CASMACAT: saveLogChunkController->doAction(): Unknown log event type: '$logEvent->type' at index: '$key'");
                     //                        return -1;    // do not stop saving of events here
             }
         }
         $db->query("COMMIT");
         $db->query("SET AUTOCOMMIT=1");
         $this->result["executionTime"] = Tools::getCurrentMillis() - $this->startTime;
         if (!isset($this->result["code"])) {
             $this->result["code"] = 0;
         }
         $this->result["data"] = "OK";
         log::doLog("CASMACAT: saveLogChunkController->doAction(): Processing of logList containing '" . $eventCount . "' elements finished, time used: '" . $this->result["executionTime"] . "' ms.");
     } catch (Exception $e) {
         $db->query("COMMIT");
         // at least, store what was ok
         $db->query("SET AUTOCOMMIT=1");
         //            $this->result["executionTime"] = time() - $this->startTime;
         $this->result["code"] = -1;
         $this->result["errors"][] = array("code" => -1, "message" => "Unexpected error: '" . $e->GetMessage() . "'");
         log::doLog("CASMACAT: saveLogChunkController->doAction(): Unexpected error: '" . $e->GetMessage() . "'");
     }
 }
     break;
 case LogEvent::SELECTION:
     $logEvent->selectionData($value);
     insertSelectionEvent($logEvent);
     break;
 case LogEvent::SCROLL:
     $logEvent->scrollData($value);
     insertScrollEvent($logEvent);
     break;
 case LogEvent::GAZE:
     $logEvent->gazeData($value);
     insertGazeEvent($logEvent);
     break;
 case LogEvent::FIXATION:
     $logEvent->fixationData($value);
     insertFixationEvent($logEvent);
     break;
 case LogEvent::DRAFTED:
 case LogEvent::TRANSLATED:
 case LogEvent::APPROVED:
 case LogEvent::REJECTED:
     insertLogEventHeader($logEvent);
     break;
 case LogEvent::VIEWPORT_TO_SEGMENT:
     insertLogEventHeader($logEvent);
     break;
 case LogEvent::SOURCE_COPIED:
     insertLogEventHeader($logEvent);
     break;
 case LogEvent::SEGMENT_OPENED:
     insertLogEventHeader($logEvent);