add pickup provider

lib/pages/pickup/model/pickup_model.dart

@@ -1,15 +1,20 @@
 import 'dart:async';
 import 'dart:io';
+import 'dart:math';
 
 import 'package:cloud_firestore/cloud_firestore.dart';
+import 'package:fcs/data/services/services.dart';
+import 'package:fcs/domain/constants.dart';
 import 'package:fcs/domain/entities/package.dart';
+import 'package:fcs/domain/entities/pickup.dart';
 import 'package:fcs/domain/entities/processing.dart';
+import 'package:fcs/helpers/firebase_helper.dart';
 import 'package:fcs/pages/main/model/base_model.dart';
 import 'package:fcs/pagination/paginator_listener.dart';
 import 'package:logging/logging.dart';
+import 'package:path/path.dart' as Path;
 
 class PickupModel extends BaseModel {
-  // List<Processing> pickups = [];
   final log = Logger('PickupModel');
 
   StreamSubscription<QuerySnapshot>? listener;
@@ -48,7 +53,33 @@ class PickupModel extends BaseModel {
     // pickups = [];
   }
 
-  Future<void> createProcessing(Processing processing) async {}
+  Future<void> complete(
+      Pickup pickup, List<File?> files, List<String?> deletedUrls) async {
+    for (String? url in deletedUrls) {
+      pickup.photoUrls.remove(url);
+    }
 
-  Future<void> updateProcessing(Processing processing) async {}
+    // check files count
+    var count = (pickup.photoUrls.length) + files.length - (deletedUrls.length);
+    if (count > uploadPhotoLimit)
+      throw Exception("Exceed number of file upload");
+
+    List<String> uploadedURLs = [];
+    String path = Path.join(pickups_files_path, pickup.id);
+    uploadedURLs = await uploadFiles(path, files);
+    pickup.photoUrls.addAll(uploadedURLs);
+    pickup.photoUrls.removeWhere((e) => deletedUrls.contains(e));
+
+    try {
+      await Services.instance.pickupService.completePickup(pickup);
+    } catch (e) {
+      // delete newly uploaded photos if fails
+      try {
+        deleteStorageFromUrls(uploadedURLs);
+        pickup.photoUrls.removeWhere((i) => uploadedURLs.contains(i));
+      } catch (e) {}
+      throw e;
+    }
+    return deleteStorageFromUrls(deletedUrls);
+  }
 }