Add asset repository and refactor asset service (#540)

* build endpoint to get asset count by month

* Added asset repository

* Added create asset

* get asset by device ID

* Added test for existing methods

* Refactor additional endpoint

* Refactor database api to get curated locations and curated objects

* Refactor get search properties

* Fixed cookies parsing for websocket

* Added API to get asset count by time group

* Remove unused code

mobile/openapi/lib/model/time_group_enum.dart

@@ -0,0 +1,85 @@
+//
+// AUTO-GENERATED FILE, DO NOT MODIFY!
+//
+// @dart=2.12
+
+// ignore_for_file: unused_element, unused_import
+// ignore_for_file: always_put_required_named_parameters_first
+// ignore_for_file: constant_identifier_names
+// ignore_for_file: lines_longer_than_80_chars
+
+part of openapi.api;
+
+
+class TimeGroupEnum {
+  /// Instantiate a new enum with the provided [value].
+  const TimeGroupEnum._(this.value);
+
+  /// The underlying value of this enum member.
+  final String value;
+
+  @override
+  String toString() => value;
+
+  String toJson() => value;
+
+  static const day = TimeGroupEnum._(r'day');
+  static const month = TimeGroupEnum._(r'month');
+
+  /// List of all possible values in this [enum][TimeGroupEnum].
+  static const values = <TimeGroupEnum>[
+    day,
+    month,
+  ];
+
+  static TimeGroupEnum? fromJson(dynamic value) => TimeGroupEnumTypeTransformer().decode(value);
+
+  static List<TimeGroupEnum>? listFromJson(dynamic json, {bool growable = false,}) {
+    final result = <TimeGroupEnum>[];
+    if (json is List && json.isNotEmpty) {
+      for (final row in json) {
+        final value = TimeGroupEnum.fromJson(row);
+        if (value != null) {
+          result.add(value);
+        }
+      }
+    }
+    return result.toList(growable: growable);
+  }
+}
+
+/// Transformation class that can [encode] an instance of [TimeGroupEnum] to String,
+/// and [decode] dynamic data back to [TimeGroupEnum].
+class TimeGroupEnumTypeTransformer {
+  factory TimeGroupEnumTypeTransformer() => _instance ??= const TimeGroupEnumTypeTransformer._();
+
+  const TimeGroupEnumTypeTransformer._();
+
+  String encode(TimeGroupEnum data) => data.value;
+
+  /// Decodes a [dynamic value][data] to a TimeGroupEnum.
+  ///
+  /// If [allowNull] is true and the [dynamic value][data] cannot be decoded successfully,
+  /// then null is returned. However, if [allowNull] is false and the [dynamic value][data]
+  /// cannot be decoded successfully, then an [UnimplementedError] is thrown.
+  ///
+  /// The [allowNull] is very handy when an API changes and a new enum value is added or removed,
+  /// and users are still using an old app with the old code.
+  TimeGroupEnum? decode(dynamic data, {bool allowNull = true}) {
+    if (data != null) {
+      switch (data.toString()) {
+        case r'day': return TimeGroupEnum.day;
+        case r'month': return TimeGroupEnum.month;
+        default:
+          if (!allowNull) {
+            throw ArgumentError('Unknown enum value to decode: $data');
+          }
+      }
+    }
+    return null;
+  }
+
+  /// Singleton [TimeGroupEnumTypeTransformer] instance.
+  static TimeGroupEnumTypeTransformer? _instance;
+}
+