feat: add timeline reactions

packages/flutter_timeline_firebase/lib/src/service/firebase_timeline_service.dart

@@ -7,7 +7,6 @@ import 'dart:typed_data';
 import 'package:cloud_firestore/cloud_firestore.dart';
 import 'package:firebase_core/firebase_core.dart';
 import 'package:firebase_storage/firebase_storage.dart';
-import 'package:flutter/material.dart';
 import 'package:flutter_timeline_firebase/src/config/firebase_timeline_options.dart';
 import 'package:flutter_timeline_interface/flutter_timeline_interface.dart';
 import 'package:uuid/uuid.dart';
@@ -35,7 +34,8 @@ class FirebaseTimelineService implements TimelineService {
   @override
   Future<TimelinePost> createPost(TimelinePost post) async {
     var postId = const Uuid().v4();
-    var imageRef = _storage.ref().child('timeline/$postId');
+    var imageRef =
+        _storage.ref().child('${_options.timelineCollectionName}/$postId');
     var result = await imageRef.putData(post.image!);
     var imageUrl = await result.ref.getDownloadURL();
     var updatedPost = post.copyWith(imageUrl: imageUrl, id: postId);
@@ -54,8 +54,17 @@ class FirebaseTimelineService implements TimelineService {
 
   @override
   Future<TimelinePost> fetchPostDetails(TimelinePost post) async {
-    debugPrint('fetchPostDetails');
+    var reactions = post.reactions ?? [];
-    return post;
+    var updatedReactions = <TimelinePostReaction>[];
+    for (var reaction in reactions) {
+      var user = await _userService.getUser(reaction.creatorId);
+      if (user != null) {
+        updatedReactions.add(reaction.copyWith(creator: user));
+      }
+    }
+    var updatedPost = post.copyWith(reactions: updatedReactions);
+    _posts = _posts.map((p) => (p.id == post.id) ? updatedPost : p).toList();
+    return updatedPost;
   }
 
   @override
@@ -124,26 +133,36 @@ class FirebaseTimelineService implements TimelineService {
   }
 
   @override
-  Future<void> reactToPost(
+  Future<TimelinePost> reactToPost(
     TimelinePost post,
     TimelinePostReaction reaction, {
     Uint8List? image,
-  }) {
+  }) async {
-    // update the post with the new reaction
+    var reactionId = const Uuid().v4();
-    _posts = _posts
+    // also fetch the user information and add it to the reaction
-        .map(
+    var user = await _userService.getUser(reaction.creatorId);
-          (p) => (p.id == post.id)
+    var updatedReaction = reaction.copyWith(id: reactionId, creator: user);
-              ? p.copyWith(
+    if (image != null) {
-                  reaction: p.reaction + 1,
+      var imageRef = _storage
-                  reactions: p.reactions?..add(reaction),
+          .ref()
-                )
+          .child('${_options.timelineCollectionName}/${post.id}/$reactionId}');
-              : p,
+      var result = await imageRef.putData(image);
-        )
+      var imageUrl = await result.ref.getDownloadURL();
-        .toList();
+      updatedReaction = updatedReaction.copyWith(imageUrl: imageUrl);
+    }
+
+    var updatedPost = post.copyWith(
+      reaction: post.reaction + 1,
+      reactions: post.reactions?..add(updatedReaction),
+    );
+
     var postRef = _db.collection(_options.timelineCollectionName).doc(post.id);
-    return postRef.update({
+    await postRef.update({
       'reaction': FieldValue.increment(1),
-      'reactions': FieldValue.arrayUnion([reaction.toJson()]),
+      // 'reactions' is a map of reactions, so we need to add the new reaction
+      // to the map
+      'reactions': FieldValue.arrayUnion([updatedReaction.toJson()]),
     });
+    return updatedPost;
   }
 }

packages/flutter_timeline_interface/lib/src/model/timeline_post.dart

@@ -39,18 +39,14 @@ class TimelinePost {
         likes: json['likes'] as int,
         likedBy: (json['liked_by'] as List<dynamic>?)?.cast<String>(),
         reaction: json['reaction'] as int,
-        reactions: (json['reactions'] as Map<String, dynamic>?)
+        reactions: (json['reactions'] as List<dynamic>?)
             ?.map(
-              (key, value) => MapEntry(
+              (e) => TimelinePostReaction.fromJson(
-                key,
+                (e as Map).keys.first,
-                TimelinePostReaction.fromJson(
-                  key,
                 id,
-                  value as Map<String, dynamic>,
+                e.values.first as Map<String, dynamic>,
-                ),
               ),
             )
-            .values
             .toList(),
         createdAt: DateTime.parse(json['created_at'] as String),
         reactionEnabled: json['reaction_enabled'] as bool,
@@ -140,7 +136,8 @@ class TimelinePost {
         'likes': likes,
         'liked_by': likedBy,
         'reaction': reaction,
-        'reactions': reactions?.map((e) => e.toJson()).toList(),
+        // reactions is a list of maps so we need to convert it to a map
+        'reactions': reactions?.map((e) => e.toJson()).toList() ?? {},
         'created_at': createdAt.toIso8601String(),
         'reaction_enabled': reactionEnabled,
       };

packages/flutter_timeline_interface/lib/src/model/timeline_reaction.dart

@@ -52,6 +52,25 @@ class TimelinePostReaction {
   /// Reaction creation date.
   final DateTime createdAt;
 
+  TimelinePostReaction copyWith({
+    String? id,
+    String? postId,
+    String? creatorId,
+    TimelinePosterUserModel? creator,
+    String? reaction,
+    String? imageUrl,
+    DateTime? createdAt,
+  }) =>
+      TimelinePostReaction(
+        id: id ?? this.id,
+        postId: postId ?? this.postId,
+        creatorId: creatorId ?? this.creatorId,
+        creator: creator ?? this.creator,
+        reaction: reaction ?? this.reaction,
+        imageUrl: imageUrl ?? this.imageUrl,
+        createdAt: createdAt ?? this.createdAt,
+      );
+
   Map<String, dynamic> toJson() => <String, dynamic>{
         id: {
           'creator_id': creatorId,

packages/flutter_timeline_interface/lib/src/services/timeline_service.dart

@@ -13,7 +13,7 @@ abstract class TimelineService {
   Future<List<TimelinePost>> fetchPosts(String? category);
   List<TimelinePost> getPosts(String? category);
   Future<TimelinePost> fetchPostDetails(TimelinePost post);
-  Future<void> reactToPost(
+  Future<TimelinePost> reactToPost(
     TimelinePost post,
     TimelinePostReaction reaction, {
     Uint8List image,

packages/flutter_timeline_view/lib/src/config/timeline_options.dart

@@ -15,6 +15,7 @@ class TimelineOptions {
     this.translations = const TimelineTranslations(),
     this.imagePickerConfig = const ImagePickerConfig(),
     this.imagePickerTheme = const ImagePickerTheme(),
+    this.sortCommentsAscending = false,
     this.dateformat,
     this.timeFormat,
     this.buttonBuilder,
@@ -31,6 +32,9 @@ class TimelineOptions {
   /// The format to display the post time in
   final DateFormat? timeFormat;
 
+  /// Whether to sort comments ascending or descending
+  final bool sortCommentsAscending;
+
   final TimelineTranslations translations;
 
   final ButtonBuilder? buttonBuilder;

packages/flutter_timeline_view/lib/src/config/timeline_translations.dart

@@ -7,6 +7,9 @@ import 'package:flutter/material.dart';
 @immutable
 class TimelineTranslations {
   const TimelineTranslations({
+    this.anonymousUser = 'Anonymous user',
+    this.noPosts = 'No posts yet',
+    this.noPostsWithFilter = 'No posts with this filter',
     this.title = 'Title',
     this.content = 'Content',
     this.contentDescription = 'What do you want to share?',
@@ -20,10 +23,16 @@ class TimelineTranslations {
     this.viewPost = 'View post',
     this.likesTitle = 'Likes',
     this.commentsTitle = 'Comments',
+    this.firstComment = 'Be the first to comment',
     this.writeComment = 'Write your comment here...',
     this.postAt = 'at',
+    this.postLoadingError = 'Something went wrong while loading the post',
   });
 
+  final String noPosts;
+  final String noPostsWithFilter;
+  final String anonymousUser;
+
   final String title;
   final String content;
   final String contentDescription;
@@ -39,4 +48,6 @@ class TimelineTranslations {
   final String likesTitle;
   final String commentsTitle;
   final String writeComment;
+  final String firstComment;
+  final String postLoadingError;
 }

packages/flutter_timeline_view/lib/src/screens/timeline_post_screen.dart

@@ -2,39 +2,111 @@
 //
 // SPDX-License-Identifier: BSD-3-Clause
 
+import 'dart:async';
+import 'dart:typed_data';
+
 import 'package:cached_network_image/cached_network_image.dart';
 import 'package:flutter/material.dart';
+import 'package:flutter_image_picker/flutter_image_picker.dart';
 import 'package:flutter_timeline_interface/flutter_timeline_interface.dart';
 import 'package:flutter_timeline_view/src/config/timeline_options.dart';
 import 'package:flutter_timeline_view/src/widgets/reaction_bottom.dart';
 import 'package:intl/intl.dart';
 
-class TimelinePostScreen extends StatelessWidget {
+class TimelinePostScreen extends StatefulWidget {
   const TimelinePostScreen({
+    required this.userId,
+    required this.service,
+    required this.userService,
     required this.options,
     required this.post,
     this.padding = const EdgeInsets.symmetric(vertical: 24, horizontal: 16),
     super.key,
   });
 
+  /// The user id of the current user
+  final String userId;
+
+  /// The timeline service to fetch the post details
+  final TimelineService service;
+
+  /// The user service to fetch the profile picture of the user
+  final TimelineUserService userService;
+
+  /// Options to configure the timeline screens
   final TimelineOptions options;
 
+  /// The post to show
   final TimelinePost post;
 
   /// The padding around the screen
   final EdgeInsets padding;
 
+  @override
+  State<TimelinePostScreen> createState() => _TimelinePostScreenState();
+}
+
+class _TimelinePostScreenState extends State<TimelinePostScreen> {
+  TimelinePost? post;
+  bool isLoading = true;
+
+  @override
+  void initState() {
+    super.initState();
+    unawaited(loadPostDetails());
+  }
+
+  Future<void> loadPostDetails() async {
+    try {
+      // Assuming fetchPostDetails is an async function returning a TimelinePost
+      var loadedPost = await widget.service.fetchPostDetails(widget.post);
+      setState(() {
+        post = loadedPost;
+        isLoading = false;
+      });
+    } on Exception catch (e) {
+      // Handle any errors here
+      debugPrint('Error loading post: $e');
+      setState(() {
+        isLoading = false;
+      });
+    }
+  }
+
+  void updatePost(TimelinePost newPost) {
+    setState(() {
+      post = newPost;
+    });
+  }
+
   @override
   Widget build(BuildContext context) {
     var theme = Theme.of(context);
-    var dateFormat = options.dateformat ??
+    var dateFormat = widget.options.dateformat ??
         DateFormat('dd/MM/yyyy', Localizations.localeOf(context).languageCode);
-    var timeFormat = options.timeFormat ?? DateFormat('HH:mm');
+    var timeFormat = widget.options.timeFormat ?? DateFormat('HH:mm');
+    if (isLoading) {
+      return const Center(
+        child: CircularProgressIndicator(),
+      );
+    }
+    if (this.post == null) {
+      return Center(
+        child: Text(widget.options.translations.postLoadingError),
+      );
+    }
+    var post = this.post!;
+    post.reactions?.sort(
+      (a, b) => widget.options.sortCommentsAscending
+          ? b.createdAt.compareTo(a.createdAt)
+          : a.createdAt.compareTo(b.createdAt),
+    );
+
     return Stack(
       children: [
         SingleChildScrollView(
           child: Padding(
-            padding: padding,
+            padding: widget.padding,
             child: Column(
               crossAxisAlignment: CrossAxisAlignment.start,
               children: [
@@ -42,7 +114,7 @@ class TimelinePostScreen extends StatelessWidget {
                   Row(
                     children: [
                       if (post.creator!.imageUrl != null) ...[
-                        options.userAvatarBuilder?.call(
+                        widget.options.userAvatarBuilder?.call(
                               post.creator!,
                               40,
                             ) ??
@@ -93,7 +165,7 @@ class TimelinePostScreen extends StatelessWidget {
                   ],
                 ),
                 Text(
-                  '${post.likes} ${options.translations.likesTitle}',
+                  '${post.likes} ${widget.options.translations.likesTitle}',
                   style: theme.textTheme.titleSmall,
                 ),
                 Row(
@@ -118,25 +190,27 @@ class TimelinePostScreen extends StatelessWidget {
                 const SizedBox(height: 4),
                 Text(
                   '${dateFormat.format(post.createdAt)} '
-                  '${options.translations.postAt} '
+                  '${widget.options.translations.postAt} '
                   '${timeFormat.format(post.createdAt)}',
                   style: theme.textTheme.bodySmall,
                 ),
                 const SizedBox(height: 12),
-
+                if (post.reactionEnabled) ...[
                   Text(
-                  options.translations.commentsTitle,
+                    widget.options.translations.commentsTitle,
                     style: theme.textTheme.displaySmall,
                   ),
                   for (var reaction
                       in post.reactions ?? <TimelinePostReaction>[]) ...[
-                  const SizedBox(height: 8),
+                    const SizedBox(height: 16),
                     Row(
-                    crossAxisAlignment: CrossAxisAlignment.start,
+                      crossAxisAlignment: reaction.imageUrl != null
+                          ? CrossAxisAlignment.start
+                          : CrossAxisAlignment.center,
                       children: [
                         if (reaction.creator?.imageUrl != null &&
                             reaction.creator!.imageUrl!.isNotEmpty) ...[
-                        options.userAvatarBuilder?.call(
+                          widget.options.userAvatarBuilder?.call(
                                 reaction.creator!,
                                 25,
                               ) ??
@@ -148,38 +222,101 @@ class TimelinePostScreen extends StatelessWidget {
                               ),
                         ],
                         const SizedBox(width: 10),
-                      if (reaction.creator?.fullName != null) ...[
+                        if (reaction.imageUrl != null) ...[
+                          Expanded(
+                            child: Column(
+                              crossAxisAlignment: CrossAxisAlignment.start,
+                              children: [
                                 Text(
-                          reaction.creator!.fullName!,
+                                  reaction.creator?.fullName ??
+                                      widget.options.translations.anonymousUser,
                                   style: theme.textTheme.titleSmall,
                                 ),
+                                Padding(
+                                  padding: const EdgeInsets.all(8.0),
+                                  child: CachedNetworkImage(
+                                    imageUrl: reaction.imageUrl!,
+                                    fit: BoxFit.fitWidth,
+                                  ),
+                                ),
                               ],
-                      const SizedBox(width: 10),
+                            ),
-                      // TODO(anyone): show image if the user send one
+                          ),
+                        ] else ...[
                           Expanded(
-                        child: Text(
+                            child: Text.rich(
-                          reaction.reaction ?? '',
+                              TextSpan(
+                                text: reaction.creator?.fullName ??
+                                    widget.options.translations.anonymousUser,
+                                style: theme.textTheme.titleSmall,
+                                children: [
+                                  const TextSpan(text: '  '),
+                                  TextSpan(
+                                    text: reaction.reaction ?? '',
                                     style: theme.textTheme.bodyMedium,
+                                  ),
                                   // text should go to new line
-                          softWrap: true,
+                                ],
+                              ),
                             ),
                           ),
                         ],
+                      ],
                     ),
-                  const SizedBox(height: 100),
+                  ],
+                  const SizedBox(height: 120),
                 ],
               ],
             ),
           ),
         ),
+        if (post.reactionEnabled)
           Align(
             alignment: Alignment.bottomCenter,
             child: ReactionBottom(
-            messageInputBuilder: options.textInputBuilder!,
+              messageInputBuilder: widget.options.textInputBuilder!,
-            onPressSelectImage: () async {},
+              onPressSelectImage: () async {
-            onReactionSubmit: (reaction) async {},
+                // open the image picker
-            translations: options.translations,
+                var result = await showModalBottomSheet<Uint8List?>(
-            iconColor: options.theme.iconColor,
+                  context: context,
+                  builder: (context) => Container(
+                    padding: const EdgeInsets.all(8.0),
+                    color: Colors.black,
+                    child: ImagePicker(
+                      imagePickerConfig: widget.options.imagePickerConfig,
+                      imagePickerTheme: widget.options.imagePickerTheme,
+                    ),
+                  ),
+                );
+                if (result != null) {
+                  updatePost(
+                    await widget.service.reactToPost(
+                      post,
+                      TimelinePostReaction(
+                        id: '',
+                        postId: post.id,
+                        creatorId: widget.userId,
+                        createdAt: DateTime.now(),
+                      ),
+                      image: result,
+                    ),
+                  );
+                }
+              },
+              onReactionSubmit: (reaction) async => updatePost(
+                await widget.service.reactToPost(
+                  post,
+                  TimelinePostReaction(
+                    id: '',
+                    postId: post.id,
+                    reaction: reaction,
+                    creatorId: widget.userId,
+                    createdAt: DateTime.now(),
+                  ),
+                ),
+              ),
+              translations: widget.options.translations,
+              iconColor: widget.options.theme.iconColor,
             ),
           ),
       ],