updated purgeTask process to also reset the cracked count in the taskwrapper, added some comments to make purge process better understandable

Author: s3inlc

src/inc/utils/TaskUtils.class.php

@@ -541,22 +541,34 @@ public static function purgeTask($taskId, $user) {
       throw new HTException("No access to this task!");
     }
     Factory::getAgentFactory()->getDB()->beginTransaction();
+    
+    // reset all benchmarks on assignments
     $qF = new QueryFilter(Assignment::TASK_ID, $task->getId(), "=");
     $uS = new UpdateSet(Assignment::BENCHMARK, 0);
     Factory::getAssignmentFactory()->massUpdate([Factory::FILTER => $qF, Factory::UPDATE => $uS]);
+    
+    // get all chunk ids of this task
     $chunks = Factory::getChunkFactory()->filter([Factory::FILTER => $qF]);
     $chunkIds = array();
     foreach ($chunks as $chunk) {
       $chunkIds[] = $chunk->getId();
     }
     if (sizeof($chunkIds) > 0) {
+      // remove relation of all hashes which were cracked with the chunks which are going to be deleted
       $qF2 = new ContainFilter(Hash::CHUNK_ID, $chunkIds);
       $uS = new UpdateSet(Hash::CHUNK_ID, null);
       Factory::getHashFactory()->massUpdate([Factory::FILTER => $qF2, Factory::UPDATE => $uS]);
       Factory::getHashBinaryFactory()->massUpdate([Factory::FILTER => $qF2, Factory::UPDATE => $uS]);
     }
+    
+    // delete all chunks and set keyspace and progress of task to 0
     Factory::getChunkFactory()->massDeletion([Factory::FILTER => $qF]);
     Factory::getTaskFactory()->mset($task, [Task::KEYSPACE => 0, Task::KEYSPACE_PROGRESS => 0]);
+    
+    // set cracked count of taskwrapper to 0
+    $taskWrapper->setCracked(0);
+    Factory::getTaskWrapperFactory()->update($taskWrapper);
+    
     Factory::getAgentFactory()->getDB()->commit();
   }