fix: 🐛 fix/Json Parsing Issue

- Added tryParse methods in `MessageType`, `MessageStatus` in `enumaration.dart`
- Fixed `fromJson()`, `toJson()` methods in `message.dart`, `reaction.dart`, `reply_message.dart`

CHANGELOG.md

@@ -1,5 +1,7 @@
 ## [1.3.2] (Unreleased)
 
+* **Fix**: [177](https://github.com/SimformSolutionsPvtLtd/flutter_chatview/pull/177) Fixed
+  json serializable of models (Message, Reaction and Reply Message).
 * **Fix**: [139](https://github.com/SimformSolutionsPvtLtd/flutter_chatview/issues/139) Added
   support to customize view for the reply of any message.
 * **Fix**: [174](https://github.com/SimformSolutionsPvtLtd/flutter_chatview/issues/174) Fix
@@ -32,7 +34,6 @@
 * **Feat**: [161](https://github.com/SimformSolutionsPvtLtd/flutter_chatview/pull/161) Added
   field to set top padding of chat text field.
 
-
 ## [1.3.1]
 
 * **Feat**: [105](https://github.com/SimformSolutionsPvtLtd/flutter_chatview/pull/105) Allow user

lib/src/models/message.dart

@@ -91,25 +91,47 @@ class Message {
   }
 
   factory Message.fromJson(Map<String, dynamic> json) => Message(
-      id: json["id"],
-      message: json["message"],
-      createdAt: json["createdAt"],
-      sendBy: json["sendBy"],
-      replyMessage: ReplyMessage.fromJson(json["reply_message"]),
-      reaction: Reaction.fromJson(json["reaction"]),
-      messageType: json["message_type"],
-      voiceMessageDuration: json["voice_message_duration"],
-      status: json['status']);
+        id: json['id']?.toString() ?? '',
+        message: json['message']?.toString() ?? '',
+        createdAt:
+            DateTime.tryParse(json['createdAt'].toString()) ?? DateTime.now(),
+        sendBy: json['sendBy']?.toString() ?? '',
+        replyMessage: json['reply_message'] == null
+            ? const ReplyMessage()
+            : ReplyMessage.fromJson(
+                json['reply_message'] is Map<String, dynamic>
+                    ? json['reply_message'] as Map<String, dynamic>
+                    : <String, dynamic>{},
+              ),
+        reaction: json['reaction'] == null
+            ? null
+            : Reaction.fromJson(
+                json['reaction'] is Map<String, dynamic>
+                    ? json['reaction'] as Map<String, dynamic>
+                    : <String, dynamic>{},
+              ),
+        messageType: MessageType.tryParse(json['message_type']?.toString()) ??
+            MessageType.text,
+        voiceMessageDuration: json['voice_message_duration'] == null
+            ? null
+            : Duration(
+                microseconds:
+                    int.tryParse(json['voice_message_duration'].toString()) ??
+                        0,
+              ),
+        status: MessageStatus.tryParse(json['status']?.toString()) ??
+            MessageStatus.pending,
+      );
 
   Map<String, dynamic> toJson() => {
         'id': id,
         'message': message,
-        'createdAt': createdAt,
+        'createdAt': createdAt.toIso8601String(),
         'sendBy': sendBy,
         'reply_message': replyMessage.toJson(),
         'reaction': reaction.toJson(),
-        'message_type': messageType,
-        'voice_message_duration': voiceMessageDuration,
-        'status': status.name
+        'message_type': messageType.name,
+        'voice_message_duration': voiceMessageDuration?.inMicroseconds,
+        'status': status.name,
       };
 }

lib/src/models/reaction.dart

@@ -4,10 +4,31 @@ class Reaction {
     required this.reactedUserIds,
   });
 
-  factory Reaction.fromJson(Map<String, dynamic> json) => Reaction(
-        reactions: json['reactions'],
-        reactedUserIds: json['reactedUserIds'],
-      );
+  factory Reaction.fromJson(Map<String, dynamic> json) {
+    final reactions = <String>[];
+    final reactionsList = json['reactions'] is List<dynamic>
+        ? json['reactions'] as List<dynamic>
+        : <dynamic>[];
+
+    for (var i = 0; i < reactionsList.length; i++) {
+      final reaction = reactionsList[i]?.toString();
+      if (reaction?.isEmpty ?? true) continue;
+      reactions.add(reaction!);
+    }
+
+    final reactedUserIds = <String>[];
+    final reactedUserIdList = json['reactedUserIds'] is List<dynamic>
+        ? json['reactedUserIds'] as List<dynamic>
+        : <dynamic>[];
+
+    for (var i = 0; i < reactedUserIdList.length; i++) {
+      final reactedUserId = reactedUserIdList[i]?.toString();
+      if (reactedUserId?.isEmpty ?? true) continue;
+      reactedUserIds.add(reactedUserId!);
+    }
+
+    return Reaction(reactions: reactions, reactedUserIds: reactedUserIds);
+  }
 
   /// Provides list of reaction in single message.
   final List<String> reactions;

lib/src/models/reply_message.dart

@@ -48,20 +48,26 @@ class ReplyMessage {
   });
 
   factory ReplyMessage.fromJson(Map<String, dynamic> json) => ReplyMessage(
-        message: json['message'],
-        replyBy: json['replyBy'],
-        replyTo: json['replyTo'],
-        messageType: json["message_type"],
-        messageId: json["id"],
-        voiceMessageDuration: json["voiceMessageDuration"],
+        message: json['message']?.toString() ?? '',
+        replyBy: json['replyBy']?.toString() ?? '',
+        replyTo: json['replyTo']?.toString() ?? '',
+        messageType: MessageType.tryParse(json['message_type']?.toString()) ??
+            MessageType.text,
+        messageId: json['id']?.toString() ?? '',
+        voiceMessageDuration: json['voiceMessageDuration'] == null
+            ? null
+            : Duration(
+                microseconds:
+                    int.tryParse(json['voiceMessageDuration'].toString()) ?? 0,
+              ),
       );
 
   Map<String, dynamic> toJson() => {
         'message': message,
         'replyBy': replyBy,
         'replyTo': replyTo,
-        'message_type': messageType,
+        'message_type': messageType.name,
         'id': messageId,
-        'voiceMessageDuration': voiceMessageDuration,
+        'voiceMessageDuration': voiceMessageDuration?.inMicroseconds,
       };
 }

lib/src/values/enumaration.dart

@@ -27,7 +27,22 @@ enum MessageType {
 
   /// Only supported on android and ios
   voice,
-  custom
+  custom;
+
+  static MessageType? tryParse(String? value) {
+    final type = value?.trim().toLowerCase();
+    if (type?.isEmpty ?? true) return null;
+    if (type == image.name) {
+      return image;
+    } else if (type == text.name) {
+      return text;
+    } else if (type == voice.name) {
+      return voice;
+    } else if (type == custom.name) {
+      return custom;
+    }
+    return null;
+  }
 }
 
 /// Events, Wheter the user is still typing a message or has
@@ -36,7 +51,27 @@ enum TypeWriterStatus { typing, typed }
 
 /// [MessageStatus] defines the current state of the message
 /// if you are sender sending a message then, the
-enum MessageStatus { read, delivered, undelivered, pending }
+enum MessageStatus {
+  read,
+  delivered,
+  undelivered,
+  pending;
+
+  static MessageStatus? tryParse(String? value) {
+    final status = value?.trim().toLowerCase();
+    if (status?.isEmpty ?? true) return null;
+    if (status == read.name) {
+      return read;
+    } else if (status == delivered.name) {
+      return delivered;
+    } else if (status == undelivered.name) {
+      return undelivered;
+    } else if (status == pending.name) {
+      return pending;
+    }
+    return null;
+  }
+}
 
 /// Types of states
 enum ChatViewState { hasMessages, noData, loading, error }