Merge pull request #7 from Livinglist/v0.1.9

fixed notification screen.

README.md

@@ -1,6 +1,6 @@
-# Hacki
+# Hacki for Hacker News
 
-A simple Hacker News reader made with Flutter.
+A simple noiseless Hacker News reader made with Flutter that is just enough.
 
 ![iOS](https://img.shields.io/badge/iOS-13%20-blue)
 [![App Store](https://img.shields.io/itunes/v/1602043763?label=App%20Store)](https://apps.apple.com/us/app/hacki/id1602043763)

fastlane/metadata/android/en-US/changelogs/26.txt

@@ -0,0 +1 @@
+- Tapping on comments in notification and history screen will lead you directly to the comment.

ios/Runner.xcodeproj/project.pbxproj

@@ -356,7 +356,7 @@
 				CLANG_ENABLE_MODULES = YES;
 				CODE_SIGN_IDENTITY = "Apple Development";
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 4;
+				CURRENT_PROJECT_VERSION = 1;
 				DEVELOPMENT_TEAM = QMWX3X2NF7;
 				ENABLE_BITCODE = NO;
 				INFOPLIST_FILE = Runner/Info.plist;
@@ -365,7 +365,7 @@
 					"$(inherited)",
 					"@executable_path/Frameworks",
 				);
-				MARKETING_VERSION = 0.1.8;
+				MARKETING_VERSION = 0.1.9;
 				PRODUCT_BUNDLE_IDENTIFIER = com.jiaqi.hacki;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				PROVISIONING_PROFILE_SPECIFIER = "";
@@ -491,7 +491,7 @@
 				CLANG_ENABLE_MODULES = YES;
 				CODE_SIGN_IDENTITY = "Apple Development";
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 4;
+				CURRENT_PROJECT_VERSION = 1;
 				DEVELOPMENT_TEAM = QMWX3X2NF7;
 				ENABLE_BITCODE = NO;
 				INFOPLIST_FILE = Runner/Info.plist;
@@ -500,7 +500,7 @@
 					"$(inherited)",
 					"@executable_path/Frameworks",
 				);
-				MARKETING_VERSION = 0.1.8;
+				MARKETING_VERSION = 0.1.9;
 				PRODUCT_BUNDLE_IDENTIFIER = com.jiaqi.hacki;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				PROVISIONING_PROFILE_SPECIFIER = "";
@@ -520,7 +520,7 @@
 				CLANG_ENABLE_MODULES = YES;
 				CODE_SIGN_IDENTITY = "Apple Development";
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 4;
+				CURRENT_PROJECT_VERSION = 1;
 				DEVELOPMENT_TEAM = QMWX3X2NF7;
 				ENABLE_BITCODE = NO;
 				INFOPLIST_FILE = Runner/Info.plist;
@@ -529,7 +529,7 @@
 					"$(inherited)",
 					"@executable_path/Frameworks",
 				);
-				MARKETING_VERSION = 0.1.8;
+				MARKETING_VERSION = 0.1.9;
 				PRODUCT_BUNDLE_IDENTIFIER = com.jiaqi.hacki;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				PROVISIONING_PROFILE_SPECIFIER = "";

lib/cubits/comments/comments_cubit.dart

@@ -8,21 +8,31 @@ import 'package:hacki/services/cache_service.dart';
 part 'comments_state.dart';
 
 class CommentsCubit<T extends Item> extends Cubit<CommentsState> {
-  CommentsCubit(
+  CommentsCubit({
-      {required T item,
     CacheService? cacheService,
-      StoriesRepository? storiesRepository})
+    StoriesRepository? storiesRepository,
-      : _cacheService = cacheService ?? locator.get<CacheService>(),
+  })  : _cacheService = cacheService ?? locator.get<CacheService>(),
         _storiesRepository =
             storiesRepository ?? locator.get<StoriesRepository>(),
-        super(CommentsState.init()) {
+        super(CommentsState.init());
-    init(item);
-  }
 
   final CacheService _cacheService;
   final StoriesRepository _storiesRepository;
 
-  Future<void> init(T item) async {
+  Future<void> init(
+    T item, {
+    bool onlyShowTargetComment = false,
+    Comment? targetComment,
+  }) async {
+    if (onlyShowTargetComment) {
+      emit(state.copyWith(
+        item: item,
+        comments: targetComment != null ? [targetComment] : [],
+        onlyShowTargetComment: true,
+      ));
+      return;
+    }
+
     if (item is Story) {
       final story = item;
       final updatedStory = await _storiesRepository.fetchStoryById(story.id);
@@ -97,6 +107,14 @@ class CommentsCubit<T extends Item> extends Cubit<CommentsState> {
     emit(state.copyWith(collapsed: !state.collapsed));
   }
 
+  void loadAll(T item) {
+    emit(state.copyWith(
+      onlyShowTargetComment: false,
+      comments: [],
+    ));
+    init(item);
+  }
+
   void _onCommentFetched(Comment? comment) {
     if (comment != null) {
       _cacheService.cacheComment(comment);

lib/cubits/comments/comments_state.dart

@@ -13,30 +13,36 @@ class CommentsState extends Equatable {
     required this.comments,
     required this.status,
     required this.collapsed,
+    required this.onlyShowTargetComment,
   });
 
   CommentsState.init()
       : item = null,
         comments = [],
         status = CommentsStatus.init,
-        collapsed = false;
+        collapsed = false,
+        onlyShowTargetComment = false;
 
   final Item? item;
   final List<Comment> comments;
   final CommentsStatus status;
   final bool collapsed;
+  final bool onlyShowTargetComment;
 
   CommentsState copyWith({
     Item? item,
     List<Comment>? comments,
     CommentsStatus? status,
     bool? collapsed,
+    bool? onlyShowTargetComment,
   }) {
     return CommentsState(
       item: item ?? this.item,
       comments: comments ?? this.comments,
       status: status ?? this.status,
       collapsed: collapsed ?? this.collapsed,
+      onlyShowTargetComment:
+          onlyShowTargetComment ?? this.onlyShowTargetComment,
     );
   }
 
@@ -46,5 +52,6 @@ class CommentsState extends Equatable {
         comments,
         status,
         collapsed,
+        onlyShowTargetComment,
       ];
 }

lib/cubits/notification/notification_cubit.dart

@@ -3,7 +3,7 @@ import 'dart:math';
 
 import 'package:bloc/bloc.dart';
 import 'package:equatable/equatable.dart';
-import 'package:hacki/blocs/auth/auth_bloc.dart';
+import 'package:hacki/blocs/blocs.dart';
 import 'package:hacki/config/locator.dart';
 import 'package:hacki/cubits/cubits.dart';
 import 'package:hacki/models/models.dart';

lib/repositories/stories_repository.dart

@@ -1,7 +1,8 @@
-import 'package:firebase/firebase_io.dart';
 import 'package:flutter/foundation.dart';
 import 'package:hacki/models/models.dart';
+import 'package:hacki/services/services.dart';
 import 'package:html_unescape/html_unescape.dart';
+import 'package:tuple/tuple.dart';
 
 class StoriesRepository {
   StoriesRepository({
@@ -128,7 +129,7 @@ class StoriesRepository {
   Future<Item?> fetchItemBy({required int id}) async {
     final item = await _firebaseClient
         .get('${_baseUrl}item/$id.json')
-        .then((dynamic val) {
+        .then((dynamic val) async {
       if (val == null) {
         return null;
       }
@@ -138,6 +139,9 @@ class StoriesRepository {
         final story = Story.fromJson(json);
         return story;
       } else if (json['type'] == 'comment') {
+        final text = json['text'] as String? ?? '';
+        final parsedText = await compute<String, String>(_parseHtml, text);
+        json['text'] = parsedText;
         final comment = Comment.fromJson(json);
         return comment;
       }
@@ -172,6 +176,22 @@ class StoriesRepository {
     return item as Story;
   }
 
+  Future<Tuple2<Story, List<Comment>>?> fetchParentStoryWithComments(
+      {required int id}) async {
+    Item? item;
+    final parentComments = <Comment>[];
+
+    do {
+      item = await fetchItemBy(id: item?.parent ?? id);
+      if (item is Comment) {
+        parentComments.add(item);
+      }
+      if (item == null) return null;
+    } while (item is Comment);
+
+    return Tuple2<Story, List<Comment>>(item as Story, parentComments);
+  }
+
   static String _parseHtml(String text) {
     return HtmlUnescape()
         .convert(text)

lib/screens/home_screen.dart

@@ -248,9 +248,7 @@ class _HomeScreenState extends State<HomeScreen>
                                     'to check out stories and comments you have '
                                     'posted in the past, and get in-app '
                                     'notification when there is new reply to '
-                                    'your comments or stories.\n\nAlso, you can '
+                                    'your comments or stories.',
-                                    'long press here to submit a new link to '
-                                    'Hacker News.',
                                     style: TextStyle(fontSize: 16),
                                   ),
                                   child: BlocBuilder<NotificationCubit,

lib/screens/profile/profile_screen.dart

@@ -40,6 +40,7 @@ class _ProfileScreenState extends State<ProfileScreen>
   final refreshControllerFav = RefreshController();
   final refreshControllerNotification = RefreshController();
   final scrollController = ScrollController();
+  final throttle = Throttle(delay: const Duration(seconds: 2));
 
   _PageType pageType = _PageType.notification;
 
@@ -52,6 +53,16 @@ class _ProfileScreenState extends State<ProfileScreen>
     'to infinity and beyond!',
   ];
 
+  @override
+  void dispose() {
+    super.dispose();
+    refreshControllerHistory.dispose();
+    refreshControllerFav.dispose();
+    refreshControllerNotification.dispose();
+    scrollController.dispose();
+    throttle.dispose();
+  }
+
   @override
   Widget build(BuildContext context) {
     super.build(context);
@@ -86,8 +97,9 @@ class _ProfileScreenState extends State<ProfileScreen>
                             }
                           },
                           builder: (context, historyState) {
-                            if (!authState.isLoggedIn ||
+                            if ((!authState.isLoggedIn ||
-                                historyState.submittedItems.isEmpty) {
+                                    historyState.submittedItems.isEmpty) &&
+                                historyState.status != HistoryStatus.loading) {
                               return const _CenteredMessageView(
                                 content: 'Your past comments and stories will '
                                     'show up here.',
@@ -96,6 +108,7 @@ class _ProfileScreenState extends State<ProfileScreen>
 
                             return ItemsListView<Item>(
                               showWebPreview: false,
+                              useConsistentFontSize: true,
                               refreshController: refreshControllerHistory,
                               items: historyState.submittedItems
                                   .where((e) => !e.dead && !e.deleted)
@@ -113,17 +126,7 @@ class _ProfileScreenState extends State<ProfileScreen>
                                       StoryScreen.routeName,
                                       arguments: StoryScreenArgs(story: item));
                                 } else if (item is Comment) {
-                                  locator
+                                  onCommentTapped(item);
-                                      .get<StoriesRepository>()
-                                      .fetchParentStory(id: item.parent)
-                                      .then((story) {
-                                    if (story != null && mounted) {
-                                      HackiApp.navigatorKey.currentState!
-                                          .pushNamed(StoryScreen.routeName,
-                                              arguments: StoryScreenArgs(
-                                                  story: story));
-                                    }
-                                  });
                                 }
                               },
                             );
@@ -144,7 +147,8 @@ class _ProfileScreenState extends State<ProfileScreen>
                             }
                           },
                           builder: (context, favState) {
-                            if (favState.favStories.isEmpty) {
+                            if (favState.favStories.isEmpty &&
+                                favState.status != FavStatus.loading) {
                               return const _CenteredMessageView(
                                 content:
                                     'Your favorite stories will show up here.'
@@ -190,22 +194,9 @@ class _ProfileScreenState extends State<ProfileScreen>
                           unreadCommentsIds:
                               notificationState.unreadCommentsIds,
                           comments: notificationState.comments,
-                          onCommentTapped: (comment) {
+                          onCommentTapped: (cmt) {
-                            locator
+                            onCommentTapped(cmt, then: () {
-                                .get<StoriesRepository>()
+                              context.read<NotificationCubit>().markAsRead(cmt);
-                                .fetchParentStory(id: comment.parent)
-                                .then((story) {
-                              if (story != null && mounted) {
-                                context
-                                    .read<NotificationCubit>()
-                                    .markAsRead(comment);
-                                HackiApp.navigatorKey.currentState!.pushNamed(
-                                  StoryScreen.routeName,
-                                  arguments: StoryScreenArgs(
-                                    story: story,
-                                  ),
-                                );
-                              }
                             });
                           },
                           onMarkAllAsReadTapped: () {
@@ -381,7 +372,7 @@ class _ProfileScreenState extends State<ProfileScreen>
                                   showAboutDialog(
                                     context: context,
                                     applicationName: 'Hacki',
-                                    applicationVersion: 'v0.1.8',
+                                    applicationVersion: 'v0.1.9',
                                     applicationIcon: Image.asset(
                                       Constants.hackiIconPath,
                                       height: 50,
@@ -595,6 +586,30 @@ class _ProfileScreenState extends State<ProfileScreen>
         });
   }
 
+  void onCommentTapped(Comment comment, {VoidCallback? then}) {
+    throttle.run(() {
+      locator
+          .get<StoriesRepository>()
+          .fetchParentStoryWithComments(id: comment.parent)
+          .then((tuple) {
+        if (tuple != null && mounted) {
+          HackiApp.navigatorKey.currentState!
+              .pushNamed(
+                StoryScreen.routeName,
+                arguments: StoryScreenArgs(
+                  story: tuple.item1,
+                  targetComments: tuple.item2.isEmpty
+                      ? [comment]
+                      : [comment, ...tuple.item2],
+                  onlyShowTargetComment: true,
+                ),
+              )
+              .then((_) => then?.call());
+        }
+      });
+    });
+  }
+
   void onLoginTapped() {
     final usernameController = TextEditingController();
     final passwordController = TextEditingController();

lib/screens/story/story_screen.dart

@@ -31,13 +31,21 @@ enum _MenuAction {
 }
 
 class StoryScreenArgs {
-  StoryScreenArgs({required this.story});
+  StoryScreenArgs({
+    required this.story,
+    this.onlyShowTargetComment = false,
+    this.targetComments,
+  });
 
   final Story story;
+  final bool onlyShowTargetComment;
+  final List<Comment>? targetComments;
 }
 
 class StoryScreen extends StatefulWidget {
-  const StoryScreen({Key? key, required this.story}) : super(key: key);
+  const StoryScreen(
+      {Key? key, required this.story, required this.parentComments})
+      : super(key: key);
 
   static const String routeName = '/story';
 
@@ -50,8 +58,11 @@ class StoryScreen extends StatefulWidget {
             create: (context) => PostCubit(),
           ),
           BlocProvider<CommentsCubit>(
-            create: (_) => CommentsCubit<Story>(
+            create: (_) => CommentsCubit<Story>()
-              item: args.story,
+              ..init(
+                args.story,
+                onlyShowTargetComment: args.onlyShowTargetComment,
+                targetComment: args.targetComments?.last,
               ),
           ),
           BlocProvider<EditCubit>(
@@ -60,12 +71,14 @@ class StoryScreen extends StatefulWidget {
         ],
         child: StoryScreen(
           story: args.story,
+          parentComments: args.targetComments ?? [],
         ),
       ),
     );
   }
 
   final Story story;
+  final List<Comment> parentComments;
 
   @override
   _StoryScreenState createState() => _StoryScreenState();
@@ -338,7 +351,8 @@ class _StoryScreenState extends State<StoryScreen> {
                       ),
                       body: SmartRefresher(
                         scrollController: scrollController,
-                        enablePullUp: true,
+                        enablePullUp: !state.onlyShowTargetComment,
+                        enablePullDown: !state.onlyShowTargetComment,
                         header: WaterDropMaterialHeader(
                           backgroundColor: Colors.orange,
                           offset: topPadding,
@@ -458,17 +472,37 @@ class _StoryScreenState extends State<StoryScreen> {
                                     ),
                                   ),
                                   if (widget.story.text.isNotEmpty)
-                                    Html(
+                                    Padding(
+                                      padding: const EdgeInsets.symmetric(
+                                        horizontal: 10,
+                                      ),
+                                      child: SelectableHtml(
                                         data: widget.story.text,
                                         onLinkTap: (link, _, __, ___) =>
                                             LinkUtil.launchUrl(link ?? ''),
                                       ),
+                                    ),
                                 ],
                               ),
                             ),
+                            if (widget.story.text.isNotEmpty)
+                              const SizedBox(
+                                height: 8,
+                              ),
                             const Divider(
                               height: 0,
                             ),
+                            if (state.onlyShowTargetComment) ...[
+                              TextButton(
+                                onPressed: () => context
+                                    .read<CommentsCubit>()
+                                    .loadAll(widget.story),
+                                child: const Text('View all comments'),
+                              ),
+                              const Divider(
+                                height: 0,
+                              ),
+                            ],
                             if (state.comments.isEmpty &&
                                 state.status == CommentsStatus.loaded) ...[
                               const SizedBox(
@@ -485,6 +519,11 @@ class _StoryScreenState extends State<StoryScreen> {
                               (e) => FadeIn(
                                 child: CommentTile(
                                   comment: e,
+                                  onlyShowTargetComment:
+                                      state.onlyShowTargetComment,
+                                  targetComments: widget.parentComments.sublist(
+                                      0,
+                                      max(widget.parentComments.length - 1, 0)),
                                   myUsername: authState.isLoggedIn
                                       ? authState.username
                                       : null,

lib/screens/story/widgets/reply_box.dart

@@ -76,7 +76,8 @@ class _ReplyBoxState extends State<ReplyBox> {
                 ),
                 const Spacer(),
                 if (!widget.isLoading) ...[
-                  if (widget.replyingTo != null) ...[
+                  ...[
+                    if (widget.replyingTo != null)
                       AnimatedOpacity(
                         opacity: expanded ? 1 : 0,
                         duration: const Duration(milliseconds: 300),

lib/screens/widgets/comment_tile.dart

@@ -1,10 +1,12 @@
+import 'dart:math';
+
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:flutter_fadein/flutter_fadein.dart';
 import 'package:flutter_linkify/flutter_linkify.dart';
 import 'package:flutter_slidable/flutter_slidable.dart';
-import 'package:hacki/blocs/auth/auth_bloc.dart';
+import 'package:hacki/blocs/blocs.dart';
 import 'package:hacki/cubits/cubits.dart';
 import 'package:hacki/models/models.dart';
 import 'package:hacki/utils/utils.dart';
@@ -19,22 +21,31 @@ class CommentTile extends StatelessWidget {
     required this.onEditTapped,
     required this.onStoryLinkTapped,
     this.loadKids = true,
+    this.onlyShowTargetComment = false,
     this.level = 0,
+    this.targetComments = const [],
   }) : super(key: key);
 
   final String? myUsername;
   final Comment comment;
   final int level;
   final bool loadKids;
+  final bool onlyShowTargetComment;
   final Function(Comment) onReplyTapped;
   final Function(Comment) onMoreTapped;
   final Function(Comment) onEditTapped;
   final Function(String) onStoryLinkTapped;
+  final List<Comment> targetComments;
 
   @override
   Widget build(BuildContext context) {
     return BlocProvider<CommentsCubit>(
-      create: (_) => CommentsCubit<Comment>(item: comment),
+      lazy: false,
+      create: (_) => CommentsCubit<Comment>()
+        ..init(comment,
+            onlyShowTargetComment: onlyShowTargetComment,
+            targetComment:
+                targetComments.isNotEmpty ? targetComments.last : null),
       child: BlocBuilder<CommentsCubit, CommentsState>(
         builder: (context, state) {
           return BlocBuilder<PreferenceCubit, PreferenceState>(
@@ -201,6 +212,16 @@ class CommentTile extends StatelessWidget {
                                     (e) => FadeIn(
                                       child: CommentTile(
                                         comment: e,
+                                        onlyShowTargetComment:
+                                            onlyShowTargetComment &&
+                                                targetComments.length > 1,
+                                        targetComments: targetComments
+                                                .isNotEmpty
+                                            ? targetComments.sublist(
+                                                0,
+                                                max(targetComments.length - 1,
+                                                    0))
+                                            : [],
                                         myUsername: myUsername,
                                         onReplyTapped: onReplyTapped,
                                         onMoreTapped: onMoreTapped,

lib/screens/widgets/items_list_view.dart

@@ -6,8 +6,7 @@ import 'package:flutter_linkify/flutter_linkify.dart';
 import 'package:flutter_slidable/flutter_slidable.dart';
 import 'package:hacki/cubits/cubits.dart';
 import 'package:hacki/models/models.dart';
-import 'package:hacki/screens/widgets/custom_circular_progress_indicator.dart';
+import 'package:hacki/screens/widgets/widgets.dart';
-import 'package:hacki/screens/widgets/story_tile.dart';
 import 'package:hacki/utils/utils.dart';
 import 'package:pull_to_refresh/pull_to_refresh.dart';
 
@@ -21,6 +20,7 @@ class ItemsListView<T extends Item> extends StatelessWidget {
     this.enablePullDown = true,
     this.pinnable = false,
     this.markReadStories = false,
+    this.useConsistentFontSize = false,
     this.onRefresh,
     this.onLoadMore,
     this.onPinned,
@@ -34,6 +34,10 @@ class ItemsListView<T extends Item> extends StatelessWidget {
 
   /// Whether story tiles can be pinned to the top.
   final bool pinnable;
+
+  /// Whether to use same font size for comment and story tiles.
+  final bool useConsistentFontSize;
+
   final List<T> items;
   final Widget? header;
   final RefreshController? refreshController;
@@ -79,6 +83,7 @@ class ItemsListView<T extends Item> extends StatelessWidget {
                     onTap: () => onTap(e),
                     showWebPreview: showWebPreview,
                     wasRead: markReadStories && wasRead,
+                    simpleTileFontSize: useConsistentFontSize ? 14 : 16,
                   ),
                 ),
               ),

lib/screens/widgets/story_tile.dart

@@ -14,12 +14,14 @@ class StoryTile extends StatelessWidget {
     required this.showWebPreview,
     required this.story,
     required this.onTap,
+    this.simpleTileFontSize = 16,
   }) : super(key: key);
 
   final bool showWebPreview;
   final bool wasRead;
   final Story story;
   final VoidCallback onTap;
+  final double simpleTileFontSize;
 
   @override
   Widget build(BuildContext context) {
@@ -178,7 +180,7 @@ class StoryTile extends StatelessWidget {
                       story.title,
                       style: TextStyle(
                         color: wasRead ? Colors.grey[500] : null,
-                        fontSize: 16,
+                        fontSize: simpleTileFontSize,
                       ),
                     ),
                   ),

lib/services/firebase_client.dart

@@ -0,0 +1,119 @@
+import 'dart:async';
+import 'dart:convert';
+
+import 'package:http/http.dart';
+
+/// FirebaseClient wraps a REST client for a Firebase realtime database.
+///
+/// The client supports authentication and GET, PUT, POST, DELETE
+/// and PATCH methods.
+class FirebaseClient {
+  /// Creates a new FirebaseClient with [credential] and optional [client].
+  ///
+  /// For credential you can either use Firebase app's secret or
+  /// an authentication token.
+  /// See: <https://firebase.google.com/docs/reference/rest/database/user-auth>.
+  FirebaseClient(this.credential, {Client? client})
+      : _client = client ?? Client();
+
+  /// Creates a new anonymous FirebaseClient with optional [client].
+  FirebaseClient.anonymous({Client? client})
+      : credential = null,
+        _client = client ?? Client();
+
+  /// Auth credential.
+  final String? credential;
+  final Client _client;
+
+  /// Reads data from database using a HTTP GET request.
+  /// The response from a successful request contains a data being retrieved.
+  ///
+  /// See: <https://firebase.google.com/docs/reference/rest/database/#section-get>.
+  Future<dynamic> get(dynamic uri) => send('GET', uri);
+
+  /// Writes or replaces data in database using a HTTP PUT request.
+  /// The response from a successful request contains a data being written.
+  ///
+  /// See: <https://firebase.google.com/docs/reference/rest/database/#section-put>.
+  Future<dynamic> put(dynamic uri, dynamic json) =>
+      send('PUT', uri, json: json);
+
+  /// Pushes data to database using a HTTP POST request.
+  /// The response from a successful request contains a key of the new data
+  /// being added.
+  ///
+  /// See: <https://firebase.google.com/docs/reference/rest/database/#section-post>.
+  Future<dynamic> post(dynamic uri, dynamic json) =>
+      send('POST', uri, json: json);
+
+  /// Updates specific children at a location without overwriting existing data
+  /// using a HTTP PATCH request.
+  /// The response from a successful request contains a data being written.
+  ///
+  /// See: <https://firebase.google.com/docs/reference/rest/database/#section-patch>.
+  Future<dynamic> patch(dynamic uri, dynamic json) =>
+      send('PATCH', uri, json: json);
+
+  /// Deletes data from database using a HTTP DELETE request.
+  /// The response from a successful request contains a JSON with `null`.
+  ///
+  /// See: <https://firebase.google.com/docs/reference/rest/database/#section-delete>.
+  Future<void> delete(dynamic uri) => send('DELETE', uri);
+
+  /// Creates a request with a HTTP [method], [url] and optional data.
+  /// The [url] can be either a `String` or `Uri`.
+  Future<Object?> send(String method, dynamic url, {dynamic json}) async {
+    final uri = url is String ? Uri.parse(url) : url as Uri;
+
+    final request = Request(method, uri);
+    if (credential != null) {
+      request.headers['Authorization'] = 'Bearer $credential';
+    }
+
+    if (json != null) {
+      request.headers['Content-Type'] = 'application/json';
+      request.body = jsonEncode(json);
+    }
+
+    final streamedResponse = await _client.send(request);
+    final response = await Response.fromStream(streamedResponse);
+
+    Object? bodyJson;
+    try {
+      bodyJson = jsonDecode(response.body);
+    } on FormatException {
+      final contentType = response.headers['content-type'];
+      if (contentType != null && !contentType.contains('application/json')) {
+        throw Exception(
+            "Returned value was not JSON. Did the uri end with '.json'?");
+      }
+      rethrow;
+    }
+
+    if (response.statusCode != 200) {
+      if (bodyJson is Map) {
+        final dynamic error = bodyJson['error'];
+        if (error != null) {
+          throw FirebaseClientException(response.statusCode, error.toString());
+        }
+      }
+
+      throw FirebaseClientException(response.statusCode, bodyJson.toString());
+    }
+
+    return bodyJson;
+  }
+
+  /// Closes the client and cleans up any associated resources.
+  void close() => _client.close();
+}
+
+class FirebaseClientException implements Exception {
+  FirebaseClientException(this.statusCode, this.message);
+
+  final int statusCode;
+  final String message;
+
+  @override
+  String toString() => '$message ($statusCode)';
+}

lib/services/services.dart

@@ -1 +1,2 @@
 export 'cache_service.dart';
+export 'firebase_client.dart';

pubspec.yaml

@@ -1,6 +1,6 @@
 name: hacki
 description: A Hacker News reader.
-version: 0.1.8+25
+version: 0.1.9+27
 publish_to: none
 
 environment:
@@ -18,8 +18,6 @@ dependencies:
   equatable: 2.0.3
   fast_gbk: ^1.0.0
   feature_discovery: ^0.14.0
-  firebase_analytics: ^8.3.4
-  firebase_core: ^1.6.0
   flutter:
     sdk: flutter
   flutter_app_badger: ^1.3.0
@@ -46,6 +44,7 @@ dependencies:
   sembast: ^3.1.1+1
   shared_preferences: ^2.0.11
   shimmer: ^2.0.0
+  tuple: ^2.0.0
   universal_platform: ^1.0.0+1
   url_launcher: ^6.0.10