abdicate object assigning responsibility

The ImagesService itself handles the conversion of Json to the object itself, instead of the ImagesApi

README.md

@@ -1,16 +1,13 @@
 # mc_gallery
 
-A new Flutter project.
+## Dart docs explanation
 
-## Getting Started
+## Emulation
 
-This project is a starting point for a Flutter application.
+## Maintaining scope
+It's an 'assignment'
 
-A few resources to get you started if this is your first Flutter project:
+## Model vs. DTO
 
-- [Lab: Write your first Flutter app](https://docs.flutter.dev/get-started/codelab)
-- [Cookbook: Useful Flutter samples](https://docs.flutter.dev/cookbook)
-
-For help getting started with Flutter development, view the
-[online documentation](https://docs.flutter.dev/), which offers tutorials,
-samples, guidance on mobile development, and a full API reference.
+## Extra quirks
+Just because I had those assets lying around

lib/features/core/data/constants/const_sorters.dart

@@ -0,0 +1,8 @@
+import 'package:string_similarity/string_similarity.dart';
+
+abstract class ConstSorters {
+  /// Uses Dice's Coefficient as a similarity metric, for a 2-way comparison, between a [targetWord]
+  /// and given words.
+  static int stringsSimilarityTarget(String a, String b, {required String targetWord}) =>
+      a.similarityTo(targetWord).compareTo(b.similarityTo(targetWord));
+}

lib/features/core/data/extensions/map_extensions.dart

@@ -1,3 +1,6 @@
 extension MapExtensions<A, B> on Map<A, B> {
   Map<A, B> get deepCopy => {...this};
+
+  /// Returns the values of a [Map] at given [keys] indices.
+  Iterable<B> valuesByKeys({required Iterable<A> keys}) => keys.map((final key) => this[key]!);
 }

lib/features/core/data/extensions/object_extensions.dart

@@ -0,0 +1,8 @@
+extension ObjectExtensions on Object? {
+  E asType<E>() => this as E;
+  E? asNullableType<E>() => this as E?;
+}
+
+extension AsCallback<T extends Object> on T {
+  T Function() get asCallback => () => this;
+}

lib/features/core/data/extensions/string_extensions.dart

@@ -0,0 +1,14 @@
+extension StringExtensions on String {
+  /// Returns true if given word contains atleast all the characters in [targetChars], and `false` otherwise
+  ///
+  /// Very efficient `O(n)` instead of naive `O(n*m)`
+  bool containsAllCharacters({required String targetChars}) {
+    final Set<String> characterSet = Set.from(targetChars.split(''));
+    for (final testChar in split('')) {
+      characterSet.remove(testChar);
+      if (characterSet.isEmpty) return true;
+    }
+
+    return false;
+  }
+}

lib/features/home/abstracts/images_api.dart

@@ -1,15 +1,13 @@
 import 'dart:async';
 
-import '../data/models/image_model.dart';
-
 /// Interface for implementing image-fetching strategies, specific to a resource location on the internet.
 ///
 /// Since I used a site that was more obscure than the ones in the examples, this (otherwise pointless
 /// and convoluting) interface is for adding a bit of flexibility to change strategy to some other site.
 abstract class ImagesApi {
-  FutureOr<Iterable<ImageModel>> fetchImageUri({required String token});
+  FutureOr<Iterable<Map<String, dynamic>>> fetchImageUri({required String token});
 
-  FutureOr<List<ImageModel>> searchImages({
+  FutureOr<Iterable<Map<String, dynamic>>> searchImages({
     required String searchStr,
     required String token,
   });

lib/features/home/api/unsplash_images_api.dart

@@ -14,14 +14,15 @@ class UnsplashImagesApi implements ImagesApi {
   final random = Random();
 
   @override
-  FutureOr<Iterable<ImageModel>> fetchImageUri({required String token}) async {
+  FutureOr<Iterable<Map<String, dynamic>>> fetchImageUri({required String token}) async {
     // Dummy fetching delay emulation
     await Future.delayed(const Duration(
         milliseconds: ConstValues.defaultEmulatedLatencyMillis * ConstValues.numberOfImages));
 
     try {
       // Create fixed number of images
-      return Iterable<int>.generate(ConstValues.numberOfImages).map((final imageIndex) {
+      final dummyImageModels =
+          Iterable<int>.generate(ConstValues.numberOfImages).map((final imageIndex) {
         // Drawing from a normal distribution
         final imageSide =
             random.nextIntInRange(min: ConstValues.minImageSize, max: ConstValues.maxImageSize);
@@ -36,6 +37,9 @@ class UnsplashImagesApi implements ImagesApi {
           imageName: Strings.current.imageNameFetch(imageIndex + 1, imageSide),
         );
       });
+
+      // Emulating serialization
+      return dummyImageModels.map((final dummyModel) => dummyModel.toJson());
     } on Exception catch (ex, stackTrace) {
       _loggingService.handleException(ex, stackTrace);
       return const Iterable.empty();
@@ -43,7 +47,7 @@ class UnsplashImagesApi implements ImagesApi {
   }
 
   @override
-  FutureOr<List<ImageModel>> searchImages({
+  FutureOr<Iterable<Map<String, dynamic>>> searchImages({
     required String searchStr,
     required String token,
   }) async {
@@ -55,7 +59,7 @@ class UnsplashImagesApi implements ImagesApi {
 
     try {
       // Create (randomly-bounded) dummy number of images
-      return Iterable<int>.generate(numberOfResults).map((final imageIndex) {
+      final dummyImageModels = Iterable<int>.generate(numberOfResults).map((final imageIndex) {
         // Drawing from a normal distribution
         final imageSide =
             random.nextIntInRange(min: ConstValues.minImageSize, max: ConstValues.maxImageSize);
@@ -68,7 +72,10 @@ class UnsplashImagesApi implements ImagesApi {
           // Custom dummy name for the image
           imageName: Strings.current.imageNameSearch(searchStr, imageIndex + 1),
         );
-      }).toList(growable: false);
+      });
+
+      // Emulating serialization
+      return dummyImageModels.map((final dummyModel) => dummyModel.toJson());
     } on Exception catch (ex, stackTrace) {
       _loggingService.handleException(ex, stackTrace);
       return List.empty();

lib/features/home/data/models/image_model.dart

@@ -1,3 +1,8 @@
+import 'package:json_annotation/json_annotation.dart';
+
+part 'image_model.g.dart';
+
+@JsonSerializable()
 class ImageModel {
   const ImageModel({
     required this.uri,
@@ -15,4 +20,9 @@ class ImageModel {
 
   /// Given name of the image.
   final String imageName;
+
+  factory ImageModel.fromJson(Map<String, dynamic> json) => _$ImageModelFromJson(json);
+
+  /// Connect the generated [_$PersonToJson] function to the `toJson` method.
+  Map<String, dynamic> toJson() => _$ImageModelToJson(this);
 }

lib/features/home/data/models/image_model.g.dart

@@ -0,0 +1,20 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of 'image_model.dart';
+
+// **************************************************************************
+// JsonSerializableGenerator
+// **************************************************************************
+
+ImageModel _$ImageModelFromJson(Map<String, dynamic> json) => ImageModel(
+      uri: Uri.parse(json['uri'] as String),
+      imageIndex: json['imageIndex'] as int,
+      imageName: json['imageName'] as String,
+    );
+
+Map<String, dynamic> _$ImageModelToJson(ImageModel instance) =>
+    <String, dynamic>{
+      'uri': instance.uri.toString(),
+      'imageIndex': instance.imageIndex,
+      'imageName': instance.imageName,
+    };

lib/features/home/services/images_service.dart

@@ -1,12 +1,16 @@
 import 'dart:async';
 
+import 'package:mc_gallery/features/core/data/extensions/string_extensions.dart';
+
+import '/features/core/data/constants/const_sorters.dart';
 import '/features/core/data/extensions/iterable_extensions.dart';
+import '/features/core/data/extensions/map_extensions.dart';
 import '/features/core/services/logging_service.dart';
 import '/features/core/utils/mutex.dart';
-import '/features/home/data/models/image_model.dart';
 import '/locator.dart';
 import '../abstracts/images_api.dart';
 import '../data/enums/search_option.dart';
+import '../data/models/image_model.dart';
 
 /// Handles fetching and storing of Images.
 ///
@@ -24,8 +28,9 @@ class ImagesService {
   final ImagesApi _imagesApi;
   final LoggingService _loggingService;
 
-  late final Iterable<ImageModel> _imageModels;
-  Iterable<ImageModel> get imageModels => _imageModels.deepCopy;
+  late final Map<String, ImageModel> _imageModels;
+  Iterable<ImageModel> get imageModels => _imageModels.values.deepCopy;
+
   final Mutex _searchMutex = Mutex();
 
   /// Manual initialization triggering
@@ -36,7 +41,11 @@ class ImagesService {
 
   Future<void> _init() async {
     _loggingService.info('Fetching and creating image models...');
-    _imageModels = await _imagesApi.fetchImageUri(token: '');
+    _imageModels = {
+      for (final imageModel in (await _imagesApi.fetchImageUri(token: ''))
+          .map((final emulatedModelSerialized) => ImageModel.fromJson(emulatedModelSerialized)))
+        imageModel.imageName: imageModel
+    };
 
     _imageModels.isNotEmpty
         ? _loggingService.good("Created ${_imageModels.length} images' models")
@@ -49,24 +58,46 @@ class ImagesService {
   int get lastAvailableImageIndex => _imageModels.length - 1;
   int get numberOfImages => _imageModels.length;
 
-  ImageModel imageModelAt({required int index}) => _imageModels.elementAt(index);
+  ImageModel imageModelAt({required int index}) => _imageModels.values.elementAt(index);
 
   Future<void> get lastQueryIsCompleted => _searchMutex.lastOperationCompletionAwaiter;
 
+  /// Performs searching on images, both locally and by a Web API endpoint.
+  ///
+  /// For now, a simple mechanism is used for handling async calls between (posssible) API fetches ->
+  /// just 'pile-up'. A mechanism can be made to 'cancel' a fetch if a newer search request comes in,
+  /// but that may be more complicated, and not the point of the assignment I think.
+  /// There are lots of optimizations possible for new inputs, for example reducing search frontier
+  /// by using set-cover/subsetting optimizations on backspace, and so on, but again, not the point,
+  /// I think.
   Future<List<ImageModel>> searchImages({
     required SearchOption searchOption,
     required String imageNamePart,
+    bool treatAsInSequence = false,
   }) async {
     return await _searchMutex.lockAndRun(run: (final unlock) async {
       try {
         switch (searchOption) {
           case SearchOption.local:
-            return [];
+            final rankedKeys = _imageModels.keys
+                // Reduce number of results by atleast occurring
+                .where((final imageName) => treatAsInSequence
+                    ? imageName.contains(imageNamePart)
+                    : imageName.containsAllCharacters(targetChars: imageNamePart))
+                .toList(growable: false)
+              // Sorting by the highest similarity first
+              ..sort((final a, final b) =>
+                  ConstSorters.stringsSimilarityTarget(targetWord: imageNamePart, a, b))
+              ..reversed;
+            return _imageModels.valuesByKeys(keys: rankedKeys).toList(growable: false);
           case SearchOption.web:
-            return await _imagesApi.searchImages(
+            return (await _imagesApi.searchImages(
               searchStr: imageNamePart,
               token: '',
-            );
+            ))
+                .map(
+                    (final emulatedModelSerialized) => ImageModel.fromJson(emulatedModelSerialized))
+                .toList(growable: false);
         }
       } finally {
         unlock();

lib/features/home/views/gallery/gallery_view_model.dart

@@ -7,12 +7,12 @@ import 'package:flutter_cache_manager/flutter_cache_manager.dart';
 import '/features/core/abstracts/base_view_model.dart';
 import '/features/core/services/logging_service.dart';
 import '/features/core/services/navigation_service.dart';
-import '/features/home/data/models/image_model.dart';
-import '/features/home/services/image_cache_manager_service.dart';
-import '/features/home/services/images_service.dart';
-import '/features/home/views/image_carousel/image_carousel_view.dart';
 import '/locator.dart';
 import '../../data/enums/search_option.dart';
+import '../../data/models/image_model.dart';
+import '../../services/image_cache_manager_service.dart';
+import '../../services/images_service.dart';
+import '../image_carousel/image_carousel_view.dart';
 
 class GalleryViewModel extends BaseViewModel {
   GalleryViewModel({
@@ -54,17 +54,20 @@ class GalleryViewModel extends BaseViewModel {
     // If empty-string (from backspacing) -> reset state.
     if (searchTerm.isEmpty) {
       _imageSearchResultsNotifier.value = [];
+      _loggingService.info('Clearing results on search string removal');
       return;
     }
 
     // Detached call to prevent UI blocking
-    unawaited(_imagesService
-        .searchImages(
-          imageNamePart: searchTerm,
-          searchOption: searchOptionListenable.value,
-        )
-        .then(
-            (final fetchedImageModels) => _imageSearchResultsNotifier.value = fetchedImageModels));
+    unawaited(
+      _imagesService
+          .searchImages(
+            imageNamePart: searchTerm,
+            searchOption: searchOptionListenable.value,
+          )
+          .then(
+              (final fetchedImageModels) => _imageSearchResultsNotifier.value = fetchedImageModels),
+    );
 
     // Force-update to trigger listening to `lastQueryResultDone()`.
     _imageSearchResultsNotifier.notifyListeners();
@@ -72,14 +75,25 @@ class GalleryViewModel extends BaseViewModel {
 
   void searchPressed() {
     // If transitioning from 'Searching', clear previous results immediately
-    if (_isSearchingNotifier.value) _imageSearchResultsNotifier.value = [];
+    if (_isSearchingNotifier.value) {
+      _imageSearchResultsNotifier.value = [];
+      _loggingService.info('Clearing of results on view mode change');
+    }
 
     _isSearchingNotifier.value = !_isSearchingNotifier.value;
   }
 
   Future<void> get lastQueryResultDone => _imagesService.lastQueryIsCompleted;
 
-  void onSearchOptionChanged(SearchOption? option) => _searchOptionNotifier.value = option!;
+  void onSearchOptionChanged(SearchOption? option) {
+    _searchOptionNotifier.value = option!;
+    _loggingService.info('Switched over to $option search');
+
+    _imageSearchResultsNotifier.value = [];
+    _loggingService.info('Cleared resultsw from view');
+
+    //todo(mehul): Either redo search or force user to type in by clearing field
+  }
 
   void onPromptPressed() => _isDisplayingPressingPrompt.value = false;
 

lib/features/home/views/gallery/search_gallery_view.dart

@@ -24,29 +24,56 @@ class _SearchGalleryView extends StatelessWidget {
               displayedWidget = const CircularProgressIndicator();
               break;
             case ConnectionState.done:
-              displayedWidget = Wrap(
-                runSpacing: 24,
-                spacing: 8,
-                alignment: WrapAlignment.center,
-                runAlignment: WrapAlignment.center,
-                crossAxisAlignment: WrapCrossAlignment.center,
-                children: [
-                  for (final imageResult in resultsImageModels)
-                    Image.network(
-                      imageResult.uri.toString(),
-                      loadingBuilder: (context, final child, final loadingProgress) =>
-                          loadingProgress == null
-                              ? child
-                              : Center(
-                                  child: CircularProgressIndicator(
-                                    value: loadingProgress.expectedTotalBytes != null
-                                        ? loadingProgress.cumulativeBytesLoaded /
-                                            loadingProgress.expectedTotalBytes!
-                                        : null,
-                                  ),
-                                ),
-                    ),
-                ],
+              displayedWidget = ValueListenableBuilder<SearchOption>(
+                valueListenable: galleryViewModel.searchOptionListenable,
+                builder: (context, final searchOption, child) {
+                  switch (searchOption) {
+                    case SearchOption.local:
+                      return Wrap(
+                        runSpacing: 24,
+                        spacing: 8,
+                        alignment: WrapAlignment.center,
+                        runAlignment: WrapAlignment.center,
+                        crossAxisAlignment: WrapCrossAlignment.center,
+                        children: [
+                          for (final resultsImageModel in resultsImageModels)
+                            CachedNetworkImage(
+                              imageUrl: resultsImageModel.uri.toString(),
+                              cacheKey: resultsImageModel.imageIndex.toString(),
+                              progressIndicatorBuilder: (_, __, final progress) =>
+                                  CircularProgressIndicator(
+                                value: galleryViewModel.downloadProgressValue(progress: progress),
+                              ),
+                            ),
+                        ],
+                      );
+                    case SearchOption.web:
+                      return Wrap(
+                        runSpacing: 24,
+                        spacing: 8,
+                        alignment: WrapAlignment.center,
+                        runAlignment: WrapAlignment.center,
+                        crossAxisAlignment: WrapCrossAlignment.center,
+                        children: [
+                          for (final imageResult in resultsImageModels)
+                            Image.network(
+                              imageResult.uri.toString(),
+                              loadingBuilder: (context, final child, final loadingProgress) =>
+                                  loadingProgress == null
+                                      ? child
+                                      : Center(
+                                          child: CircularProgressIndicator(
+                                            value: loadingProgress.expectedTotalBytes != null
+                                                ? loadingProgress.cumulativeBytesLoaded /
+                                                    loadingProgress.expectedTotalBytes!
+                                                : null,
+                                          ),
+                                        ),
+                            ),
+                        ],
+                      );
+                  }
+                },
               );
           }
 

pubspec.lock

@@ -57,6 +57,62 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.1.0"
+  build:
+    dependency: transitive
+    description:
+      name: build
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.3.1"
+  build_config:
+    dependency: transitive
+    description:
+      name: build_config
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.1"
+  build_daemon:
+    dependency: transitive
+    description:
+      name: build_daemon
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.1.0"
+  build_resolvers:
+    dependency: transitive
+    description:
+      name: build_resolvers
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.0"
+  build_runner:
+    dependency: "direct dev"
+    description:
+      name: build_runner
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.3.3"
+  build_runner_core:
+    dependency: transitive
+    description:
+      name: build_runner_core
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "7.2.7"
+  built_collection:
+    dependency: transitive
+    description:
+      name: built_collection
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "5.1.1"
+  built_value:
+    dependency: transitive
+    description:
+      name: built_value
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "8.4.2"
   cached_network_image:
     dependency: "direct main"
     description:
@@ -92,6 +148,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.2.1"
+  checked_yaml:
+    dependency: transitive
+    description:
+      name: checked_yaml
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.1"
   clock:
     dependency: transitive
     description:
@@ -99,6 +162,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.1.1"
+  code_builder:
+    dependency: transitive
+    description:
+      name: code_builder
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "4.4.0"
   collection:
     dependency: transitive
     description:
@@ -183,6 +253,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "6.1.4"
+  fixnum:
+    dependency: transitive
+    description:
+      name: fixnum
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.1"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -233,6 +310,13 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
+  frontend_server_client:
+    dependency: transitive
+    description:
+      name: frontend_server_client
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.2.0"
   get_it:
     dependency: "direct main"
     description:
@@ -254,6 +338,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "6.0.0"
+  graphs:
+    dependency: transitive
+    description:
+      name: graphs
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.2.0"
   http:
     dependency: transitive
     description:
@@ -261,6 +352,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "0.13.5"
+  http_multi_server:
+    dependency: transitive
+    description:
+      name: http_multi_server
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.2.1"
   http_parser:
     dependency: transitive
     description:
@@ -289,6 +387,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.8.1"
+  io:
+    dependency: transitive
+    description:
+      name: io
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.3"
   js:
     dependency: transitive
     description:
@@ -296,6 +401,20 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "0.6.4"
+  json_annotation:
+    dependency: "direct dev"
+    description:
+      name: json_annotation
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "4.7.0"
+  json_serializable:
+    dependency: "direct dev"
+    description:
+      name: json_serializable
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "6.5.4"
   lints:
     dependency: transitive
     description:
@@ -338,6 +457,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.8.0"
+  mime:
+    dependency: transitive
+    description:
+      name: mime
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.3"
   nested:
     dependency: transitive
     description:
@@ -471,6 +597,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "3.6.2"
+  pool:
+    dependency: transitive
+    description:
+      name: pool
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.5.1"
   process:
     dependency: transitive
     description:
@@ -492,6 +625,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.1.3"
+  pubspec_parse:
+    dependency: transitive
+    description:
+      name: pubspec_parse
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.2.1"
   rxdart:
     dependency: transitive
     description:
@@ -499,11 +639,39 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "0.27.7"
+  shelf:
+    dependency: transitive
+    description:
+      name: shelf
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.4.0"
+  shelf_web_socket:
+    dependency: transitive
+    description:
+      name: shelf_web_socket
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.3"
   sky_engine:
     dependency: transitive
     description: flutter
     source: sdk
     version: "0.0.99"
+  source_gen:
+    dependency: transitive
+    description:
+      name: source_gen
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.2.6"
+  source_helper:
+    dependency: transitive
+    description:
+      name: source_helper
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.3.3"
   source_span:
     dependency: transitive
     description:
@@ -539,6 +707,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.1.0"
+  stream_transform:
+    dependency: transitive
+    description:
+      name: stream_transform
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.0"
   string_scanner:
     dependency: transitive
     description:
@@ -546,6 +721,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.1.1"
+  string_similarity:
+    dependency: "direct main"
+    description:
+      name: string_similarity
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.0"
   synchronized:
     dependency: transitive
     description:
@@ -588,6 +770,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "0.4.12"
+  timing:
+    dependency: transitive
+    description:
+      name: timing
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.0"
   typed_data:
     dependency: transitive
     description:
@@ -616,6 +805,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.0.2"
+  web_socket_channel:
+    dependency: transitive
+    description:
+      name: web_socket_channel
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.2.0"
   win32:
     dependency: transitive
     description:

pubspec.yaml

@@ -29,6 +29,7 @@ dependencies:
   intl_utils: ^2.8.1
   connectivity_plus: ^3.0.2
   internet_connection_checker: ^1.0.0+1
+  string_similarity: ^2.0.0
 
   # Util frontend
   flutter_markdown: ^0.6.13
@@ -49,6 +50,11 @@ dev_dependencies:
 
   flutter_lints: ^2.0.1
 
+  # Builders
+  build_runner: ^2.3.3
+  json_annotation: ^4.7.0
+  json_serializable: ^6.5.4
+
 flutter:
   uses-material-design: true