Add ChatRoom

AwesomeUIWidgets/Assets/Scripts/ChatRoom/Messages/custom_message.cs

+using System.Collections.Generic;
+
+namespace ChatComponents
+{
+    public class CustomMessage : Message
+    {
+        /// Creates a custom message.
+        public CustomMessage(
+            User author,
+            string id,
+            int? createdAt = null,
+            Dictionary<string, object> metadata = null,
+            string roomId = null,
+            Status? status = default
+        ) : base(
+            author,
+            createdAt,
+            id,
+            metadata,
+            roomId,
+            status,
+            MessageType.custom
+        )
+        {
+        }
+
+        public override List<object> props => new List<object>
+        {
+            author,
+            createdAt,
+            id,
+            metadata,
+            roomId,
+            status
+        };
+
+        /// Creates a custom message from a map (decoded JSON).
+        public static CustomMessage fromJson(Dictionary<string, object> json)
+        {
+            return new CustomMessage(
+                User.fromJson(json["author"] as Dictionary<string, object>),
+                createdAt: json["createdAt"] as int?,
+                id: json["id"] as string,
+                metadata: json["metadata"] as Dictionary<string, object>,
+                roomId: json["roomId"] as string,
+                status: ChatRoomUtils.getStatusFromString(json["status"] as string));
+        }
+
+        /// Converts a custom message to the map representation,
+        /// encodable to JSON.
+        public override Dictionary<string, object> toJson()
+        {
+            return new Dictionary<string, object>
+            {
+                {"author", author.toJson()},
+                {"createdAt", createdAt},
+                {"id", id},
+                {"metadata", metadata},
+                {"roomId", roomId},
+                {"status", ChatRoomUtils.toShortString(status)},
+                {"type", ChatRoomUtils.toShortString(type)}
+            };
+        }
+
+        /// Creates a copy of the custom message with an updated data.
+        /// [metadata] with null value will nullify existing metadata, otherwise
+        /// both metadatas will be merged into one Map, where keys from a passed
+        /// metadata will overwite keys from the previous one.
+        /// [previewData] is ignored for this message type.
+        /// [status] with null value will be overwritten by the previous status.
+        /// [text] is ignored for this message type.
+        public override Message copyWith(
+            Dictionary<string, object> metadata = null,
+            PreviewData previewData = null,
+            Status? status = null,
+            string text = null
+        )
+        {
+            var result = new Dictionary<string, object>();
+            if (this.metadata != null)
+                foreach (var metaItem in this.metadata)
+                    result.Add(metaItem.Key, metaItem.Value);
+            foreach (var metaItem in metadata) result.Add(metaItem.Key, metaItem.Value);
+            return new CustomMessage(
+                author,
+                createdAt: createdAt,
+                id: id,
+                metadata: metadata == null
+                    ? null
+                    : result,
+                roomId: roomId,
+                status: status ?? this.status
+            );
+        }
+        /// Equatable props
+    }
+}