🐛 (fix) Null issues

Author: TheAlphamerc

lib/state/feedState.dart

@@ -267,8 +267,8 @@ class FeedState extends AppState {
 
   /// Fetch `Retweet` model from firebase realtime kDatabase.
   /// Retweet itself  is a type of `Tweet`
-  Future<FeedModel> fetchTweet(String postID) async {
-    late FeedModel _tweetDetail;
+  Future<FeedModel?> fetchTweet(String postID) async {
+    FeedModel? _tweetDetail;
 
     /// If tweet is availabe in feedlist then no need to fetch it from firebase
     if (feedlist!.any((x) => x.key == postID)) {
@@ -284,8 +284,8 @@ class FeedState extends AppState {
           if (snapshot.value != null) {
             var map = snapshot.value as Map<dynamic, dynamic>;
             _tweetDetail = FeedModel.fromJson(map);
-            _tweetDetail.key = snapshot.key!;
-            print(_tweetDetail.description);
+            _tweetDetail!.key = snapshot.key!;
+            print(_tweetDetail!.description);
           }
         },
       );
@@ -408,7 +408,7 @@ class FeedState extends AppState {
   }
 
   /// [update] tweet
-  updateTweet(FeedModel model) async {
+  Future<void> updateTweet(FeedModel model) async {
     await kDatabase.child('tweet').child(model.key!).set(model.toJson());
   }
 
@@ -454,7 +454,7 @@ class FeedState extends AppState {
 
   /// Add [new comment tweet] to any tweet
   /// Comment is a Tweet itself
-  Future addcommentToPost(FeedModel replyTweet) async {
+  Future<String?> addcommentToPost(FeedModel replyTweet) async {
     try {
       isBusy = true;
       notifyListeners();
@@ -466,7 +466,8 @@ class FeedState extends AppState {
         DatabaseReference ref = kDatabase.child('tweet').push();
         await ref.set(json);
         tweet.replyTweetKeyList!.add(ref.key);
-        updateTweet(tweet);
+        await updateTweet(tweet);
+        return ref.key;
       }
     } catch (error) {
       cprint(error, errorIn: 'addcommentToPost');

lib/widgets/tweet/widgets/parentTweet.dart

@@ -32,7 +32,7 @@ class ParentTweetWidget extends StatelessWidget {
     var feedstate = Provider.of<FeedState>(context, listen: false);
     return FutureBuilder(
       future: feedstate.fetchTweet(childRetwetkey),
-      builder: (context, AsyncSnapshot<FeedModel> snapshot) {
+      builder: (context, AsyncSnapshot<FeedModel?> snapshot) {
         if (snapshot.hasData) {
           return Tweet(
             model: snapshot.data!,

lib/widgets/tweet/widgets/retweetWidget.dart

@@ -106,7 +106,7 @@ class RetweetWidget extends StatelessWidget {
     var feedstate = Provider.of<FeedState>(context, listen: false);
     return FutureBuilder(
       future: feedstate.fetchTweet(childRetwetkey),
-      builder: (context, AsyncSnapshot<FeedModel> snapshot) {
+      builder: (context, AsyncSnapshot<FeedModel?> snapshot) {
         if (snapshot.hasData) {
           return Container(
             margin: EdgeInsets.only(

lib/widgets/tweet/widgets/tweetBottomSheet.dart

@@ -450,9 +450,11 @@ class TweetBottomSheet {
 
             Navigator.pop(context);
             var sharedPost = await state.fetchTweet(post.childRetwetkey!);
-            sharedPost.retweetCount ??= 0;
-            sharedPost.retweetCount = sharedPost.retweetCount! + 1;
-            state.updateTweet(sharedPost);
+            if (sharedPost != null) {
+              sharedPost.retweetCount ??= 0;
+              sharedPost.retweetCount = sharedPost.retweetCount! + 1;
+              state.updateTweet(sharedPost);
+            }
           },
         ),
         _widgetBottomSheetRow(

lib/widgets/tweet/widgets/unavailableTweet.dart

@@ -7,7 +7,7 @@ class UnavailableTweet extends StatelessWidget {
   const UnavailableTweet({Key? key, required this.snapshot, required this.type})
       : super(key: key);
 
-  final AsyncSnapshot<FeedModel> snapshot;
+  final AsyncSnapshot<FeedModel?> snapshot;
   final TweetType type;
 
   @override