store device collection upload strategy

lib/db/device_files_db.dart

@@ -5,6 +5,7 @@ import 'package:photos/db/files_db.dart';
 import 'package:photos/models/device_collection.dart';
 import 'package:photos/models/file.dart';
 import 'package:photos/models/file_load_result.dart';
+import 'package:photos/models/upload_strategy.dart';
 import 'package:photos/services/local/local_sync_util.dart';
 import 'package:sqflite/sqlite_api.dart';
 import 'package:tuple/tuple.dart';
@@ -313,6 +314,7 @@ extension DeviceFiles on FilesDB {
           collectionID: row["collection_id"],
           coverId: row["cover_id"],
           shouldBackup: (row["should_backup"] ?? _sqlBoolFalse) == _sqlBoolTrue,
+          uploadStrategy: getUploadType(row["upload_strategy"] ?? 0),
         );
         if (includeCoverThumbnail) {
           deviceCollection.thumbnail = coverFiles.firstWhere(

lib/db/files_db.dart

@@ -317,6 +317,7 @@ class FilesDB {
           should_backup INTEGER NOT NULL DEFAULT 0,
           count INTEGER NOT NULL DEFAULT 0,
           collection_id INTEGER DEFAULT -1,
+          upload_strategy INTEGER DEFAULT 0,
           cover_id TEXT
       );
       ''',

lib/models/device_collection.dart

@@ -1,4 +1,5 @@
 import 'package:photos/models/file.dart';
+import 'package:photos/models/upload_strategy.dart';
 
 class DeviceCollection {
   final String id;
@@ -6,6 +7,7 @@ class DeviceCollection {
   final String coverId;
   final int count;
   final bool shouldBackup;
+  UploadStrategy uploadStrategy;
   int collectionID;
   File thumbnail;
 
@@ -16,6 +18,7 @@ class DeviceCollection {
     this.count,
     this.collectionID,
     this.thumbnail,
+    this.uploadStrategy = UploadStrategy.ifMissing,
     this.shouldBackup = false,
   });
 }

lib/models/upload_strategy.dart

@@ -0,0 +1,30 @@
+enum UploadStrategy {
+  // uploader will only try to upload the file in a collection if the file is
+  // not already uploaded
+  ifMissing,
+  // alwaysUpload will always try to upload or add the file to given collection
+  always,
+  other,
+}
+
+int getInt(UploadStrategy uploadType) {
+  switch (uploadType) {
+    case UploadStrategy.ifMissing:
+      return 0;
+    case UploadStrategy.always:
+      return 1;
+    default:
+      return -1;
+  }
+}
+
+UploadStrategy getUploadType(int uploadType) {
+  switch (uploadType) {
+    case 0:
+      return UploadStrategy.ifMissing;
+    case 1:
+      return UploadStrategy.always;
+    default:
+      return UploadStrategy.other;
+  }
+}