diff --git a/app/Http/Controllers/ActivityController.php b/app/Http/Controllers/ActivityController.php
index 561c767..4fedaf9 100644
--- a/app/Http/Controllers/ActivityController.php
+++ b/app/Http/Controllers/ActivityController.php
@@ -6,6 +6,7 @@ use App\Models\CommentActivity;
 use App\Models\Link;
 use App\Models\Project;
 use App\Models\TemplateGantt;
+use App\Models\VersionGantt;
 use App\Models\UserToActivity;
 use Illuminate\Http\Request;
 
@@ -277,7 +278,112 @@ class ActivityController extends Controller
 		$dataGet = $builder->get();
 		$totalRecord = $countBuilder->count();
 		return response()->json(['status'=>'success','code'=>200,'data'=>$dataGet, 'totalRecord'=>$totalRecord], 200);
-	}
+  }
+
+  public function import(Request $request)
+	{
+    $data = $request->all();
+
+		$data['created_by'] = $this->currentName;
+
+		Activity::where('version_gantt_id', $data['ganttId'])->delete();
+
+		$projectId = VersionGantt::where('id', $data['ganttId'])->first()->proyek_id;
+
+		$activityStack = [];
+
+		foreach ($data['activities'] as $i => $activity_row) {
+			$startDate = \DateTime::createFromFormat('d-m-y', $activity_row['start_date']);
+			$endDate = \DateTime::createFromFormat('d-m-y', $activity_row['end_date']);
+
+			$input['name'] = $activity_row['name'];
+			$input['proyek_id'] = $projectId;
+			$input['version_gantt_id'] = $data['ganttId'];
+			$input['parent_id'] = null;
+			$input['start_date'] = $startDate->format('Y-m-d');
+			$input['end_date'] = $endDate->format('Y-m-d');
+			$input['duration'] = $activity_row['duration'];
+			$input['bobot_planning'] = $activity_row['weight'];
+			$input['persentase_progress'] = 0;
+			$input['type_activity'] = $i == 0 ? "header" : "task";
+      $input['created_by'] = $this->currentName;
+
+			if (!$activity = Activity::create($input)) {
+				Activity::where('version_gantt_id', $data['ganttId'])->delete();
+				return response()->json(['status' => 'error', 'message' => 'Input failed on ' . $activity['name'], 'code' => 500], 500);
+			}
 
+			$data['activities'][$i]['activity_id'] = $activity->id;
+
+			if ($i == 0) {
+        $activity->type_activity = "project";
+				$activity->save();
+				$activity->level = $activity_row['level'];
+				array_push($activityStack, $activity);
+				continue;
+			}
+
+			$activity->level = $activity_row['level'];
+
+			if ($lastStack = end($activityStack)) {
+				$levelLowerThanLastStack = $activity->level < $lastStack->level;
+				$levelEqualWithLastStack = $activity->level == $lastStack->level;
+
+				if ($levelLowerThanLastStack) {
+					$lastStackIsNotRight = $levelLowerThanLastStack;
+					do {
+						array_pop($activityStack);
+						$lastStack = end($activityStack);
+						if ($activity->level > $lastStack->level)
+							$lastStackIsNotRight = false;
+					} while ($lastStackIsNotRight);
+				}
+
+				if ($levelEqualWithLastStack) {
+					array_pop($activityStack);
+				}
+			}
+
+			$activity->parent_id = $activityStack[count($activityStack) - 1]->id ?? null;
+			// there should be better way to except / filter attribute level before save because it's cause error
+			// cant use except() / filter() on $activity collection somehow
+			unset($activity->level);
+			$activity->save();
+			$activity->level = $activity_row['level'];
+
+			if (@$activityStack[count($activityStack) - 1]->level != $activity->level && $activity->level != $data['activities'][$i - 1]['level']) {
+				array_push($activityStack, $activity);
+			}
+
+			if ($activity->level < @$data['activities'][$i + 1]['level']) {
+				unset($activity->level);
+				$activity->type_activity = "project";
+				$activity->save();
+				$activity->level = $activity_row['level'];
+			}
+
+			if (!empty($activity_row['predecessor'])) {
+				$key = array_search($activity_row['predecessor'], array_column($data['activities'], 'no'));
+
+				if (!$predecessorActivity = Activity::find($data['activities'][$key]['activity_id']))
+					continue;
+
+				$predecessorFinishDate = new \DateTime($predecessorActivity->end_date);
+				$interval = $predecessorFinishDate->diff(new \DateTime($activity->start_date));
+				$diff = $interval->days;
+
+				Link::create([
+					'created_by' => $this->currentName,
+					's_activity_id' => $predecessorActivity->id,
+					't_activity_id' => $activity->id,
+					'type_link' => 0,
+					'code_link' => 'FS',
+					'version_gantt_id' => $data['ganttId'],
+					'lag' => $diff > 1 ? $diff : null,
+				]);
+			}
+		}
 
+		return response()->json(['stack' => $activityStack, 'status' => 'success', 'message' => 'Data imported!', 'projectId' => $projectId, 'code' => 200], 200);
+	}     
 }
diff --git a/app/Models/Activity.php b/app/Models/Activity.php
index 7ee841a..4c436d8 100644
--- a/app/Models/Activity.php
+++ b/app/Models/Activity.php
@@ -63,9 +63,9 @@ class Activity extends Model
 				$data->updatePersentaseProgress();
 				$data->updateCostActual();
 			}
-			if($data->start_date != request()->start_date || $data->end_date != request()->end_date) {
-				$data->updateStartEndDateHeader();
-			}
+			// if($data->start_date != request()->start_date || $data->end_date != request()->end_date) {
+			// 	$data->updateStartEndDateHeader();
+			// }
 		});
 
 		static::deleted(function($data) {
diff --git a/routes/web.php b/routes/web.php
index b102e41..8d6f568 100644
--- a/routes/web.php
+++ b/routes/web.php
@@ -200,6 +200,7 @@ $router->group(['prefix'=>'api', 'middleware' => 'cors'], function () use ($rout
 		$router->get('/sumVolActualM/{id}', 'ActivityController@sumVolumeActualMaterial');
 		$router->get('/activity/{id}/{proyek_id}/get', 'ActivityController@getByGanttId');
 		$router->get('/activity/search', 'ActivityController@search');
+    $router->post('/activity/import', 'ActivityController@import');
 		$router->post('/task', 'ActivityController@add');
 		$router->get('/task/edit/{id}', 'ActivityController@edit');
 		$router->put('/task/{id}', 'ActivityController@update');