Allow to to disable the saving of changed or deleted data.

Also it is possible to only save the information which fields were changed, not the data in it.

.env

@@ -59,3 +59,17 @@ EMAIL_SENDER_EMAIL=noreply@partdb.changeme
 # Set this to 1 to allow reset of a password per email
 ALLOW_EMAIL_PW_RESET=0
 
+
+######################################################################################
+# History/Eventlog related settings
+######################################################################################
+
+# If you want to use full timetrave functionality
+
+# Save which fields were changed in a ElementEdited log entry
+HISTORY_SAVE_CHANGED_FIELDS=1
+# Save the old data in the  ElementEdited log entry (warning this could increase the database size in short time)
+HISTORY_SAVE_CHANGED_DATA=0
+# Save the data of an element that gets removed into log entry. This allows to undelete an element
+HISTORY_SAVE_REMOVED_DATA=0
+

config/services.yaml

@@ -74,6 +74,10 @@ services:
             - { name: "doctrine.orm.entity_listener" }
 
     App\EventSubscriber\EventLoggerSubscriber:
+        arguments:
+            $save_changed_fields: '%env(bool:HISTORY_SAVE_CHANGED_FIELDS)%'
+            $save_changed_data: '%env(bool:HISTORY_SAVE_CHANGED_DATA)%'
+            $save_removed_data: '%env(bool:HISTORY_SAVE_REMOVED_DATA)%'
         tags:
             - { name: 'doctrine.event_subscriber' }
 

src/Entity/LogSystem/ElementEditedLogEntry.php

@@ -68,7 +68,7 @@ class ElementEditedLogEntry extends AbstractLogEntry implements TimeTravelInterf
      */
     public function hasChangedFieldsInfo(): bool
     {
-        return $this->hasOldDataInformations();
+        return isset($this->extra['f']) || $this->hasOldDataInformations();
     }
 
     /**
@@ -77,9 +77,28 @@ class ElementEditedLogEntry extends AbstractLogEntry implements TimeTravelInterf
      */
     public function getChangedFields(): array
     {
+        if ($this->hasOldDataInformations()) {
             return array_keys($this->getOldData());
         }
 
+        if (isset($this->extra['f'])) {
+            return $this->extra['f'];
+        }
+
+        return [];
+    }
+
+    /**
+     * Set the fields that were changed during this element change.
+     * @param  string[]  $changed_fields The names of the fields that were changed during the elements
+     * @return $this
+     */
+    public function setChangedFields(array $changed_fields): self
+    {
+        $this->extra['f'] = $changed_fields;
+        return $this;
+    }
+
     /**
      * Sets the old data for this entry.
      * @param array $old_data

src/EventSubscriber/EventLoggerSubscriber.php

@@ -25,6 +25,7 @@ use App\Entity\LogSystem\AbstractLogEntry;
 use App\Entity\LogSystem\ElementCreatedLogEntry;
 use App\Entity\LogSystem\ElementDeletedLogEntry;
 use App\Entity\LogSystem\ElementEditedLogEntry;
+use App\Entity\UserSystem\User;
 use App\Services\LogSystem\EventCommentHelper;
 use App\Services\LogSystem\EventLogger;
 use Doctrine\Common\EventSubscriber;
@@ -37,15 +38,26 @@ use Symfony\Component\Serializer\SerializerInterface;
 
 class EventLoggerSubscriber implements EventSubscriber
 {
+
+    protected const MAX_STRING_LENGTH = 2000;
+
     protected $logger;
     protected $serializer;
     protected $eventCommentHelper;
+    protected $save_changed_fields;
+    protected $save_changed_data;
+    protected $save_removed_data;
 
-    public function __construct(EventLogger $logger, SerializerInterface $serializer, EventCommentHelper $commentHelper)
+    public function __construct(EventLogger $logger, SerializerInterface $serializer, EventCommentHelper $commentHelper,
+        bool $save_changed_fields, bool $save_changed_data, bool $save_removed_data)
     {
         $this->logger = $logger;
         $this->serializer = $serializer;
         $this->eventCommentHelper = $commentHelper;
+
+        $this->save_changed_fields = $save_changed_fields;
+        $this->save_changed_data = $save_changed_data;
+        $this->save_removed_data = $save_removed_data;
     }
 
     public function onFlush(OnFlushEventArgs $eventArgs)
@@ -61,7 +73,12 @@ class EventLoggerSubscriber implements EventSubscriber
         foreach ($uow->getScheduledEntityUpdates() as $entity) {
             if ($this->validEntity($entity)) {
                 $log = new ElementEditedLogEntry($entity);
+                if ($this->save_changed_data) {
                     $this->saveChangeSet($entity, $log, $uow);
+                } elseif ($this->save_changed_fields) {
+                    $changed_fields = array_keys($uow->getEntityChangeSet($entity));
+                    $log->setChangedFields($changed_fields);
+                }
                 //Add user comment to log entry
                 if ($this->eventCommentHelper->isMessageSet()) {
                     $log->setComment($this->eventCommentHelper->getMessage());
@@ -77,7 +94,9 @@ class EventLoggerSubscriber implements EventSubscriber
                 if ($this->eventCommentHelper->isMessageSet()) {
                     $log->setComment($this->eventCommentHelper->getMessage());
                 }
+                if ($this->save_removed_data) {
                     $this->saveChangeSet($entity, $log, $uow);
+                }
                 $this->logger->log($log);
             }
         }
@@ -94,6 +113,21 @@ class EventLoggerSubscriber implements EventSubscriber
 
         $changeSet = $uow->getEntityChangeSet($entity);
         $old_data = array_diff(array_combine(array_keys($changeSet), array_column($changeSet, 0)), [null]);
+        //Restrict length of string fields, to save memory...
+        $old_data = array_map(function ($value) {
+            if (is_string($value)) {
+                return mb_strimwidth($value, 0, self::MAX_STRING_LENGTH, '...');
+            }
+
+            return $value;
+        }, $old_data);
+
+        //Dont save sensitive fields to log
+        if ($entity instanceof User) {
+            unset($old_data['password'], $old_data['pw_reset_token'], $old_data['backupCodes']);
+        }
+
+
         $logEntry->setOldData($old_data);
     }