Desktop photo search (#174)

experimental/desktop_photo_search/lib/src/unsplash/exif.dart

@@ -0,0 +1,53 @@
+// Copyright 2019 The Flutter team. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'dart:convert';
+
+import 'package:built_value/built_value.dart';
+import 'package:built_value/serializer.dart';
+
+import '../serializers.dart';
+
+part 'exif.g.dart';
+
+abstract class Exif implements Built<Exif, ExifBuilder> {
+  factory Exif([void Function(ExifBuilder) updates]) = _$Exif;
+
+  Exif._();
+
+  @nullable
+  @BuiltValueField(wireName: 'make')
+  String get make;
+
+  @nullable
+  @BuiltValueField(wireName: 'model')
+  String get model;
+
+  @nullable
+  @BuiltValueField(wireName: 'exposure_time')
+  String get exposureTime;
+
+  @nullable
+  @BuiltValueField(wireName: 'aperture')
+  String get aperture;
+
+  @nullable
+  @BuiltValueField(wireName: 'focal_length')
+  String get focalLength;
+
+  @nullable
+  @BuiltValueField(wireName: 'iso')
+  int get iso;
+
+  String toJson() {
+    return json.encode(serializers.serializeWith(Exif.serializer, this));
+  }
+
+  static Exif fromJson(String jsonString) {
+    return serializers.deserializeWith(
+        Exif.serializer, json.decode(jsonString));
+  }
+
+  static Serializer<Exif> get serializer => _$exifSerializer;
+}