[#94] Backend

https://project.mdnd-it.cc/work_packages/94

SerpentRace_Backend/src/Application/DTOs/Mappers/ChatMapper.ts

@@ -0,0 +1,26 @@
+import { ChatAggregate } from '../../../Domain/Chat/ChatAggregate';
+import { ShortChatDto, DetailChatDto } from '../ChatDto';
+
+export class ChatMapper {
+  static toShortDto(chat: ChatAggregate): ShortChatDto {
+    return {
+      id: chat.id,
+      userCount: chat.users?.length ?? 0,
+      state: chat.state,
+    };
+  }
+
+  static toDetailDto(chat: ChatAggregate): DetailChatDto {
+    return {
+      id: chat.id,
+      users: chat.users ?? [],
+      messages: chat.messages,
+      updateDate: chat.updateDate,
+      state: chat.state,
+    };
+  }
+
+  static toShortDtoList(chats: ChatAggregate[]): ShortChatDto[] {
+    return chats.map(this.toShortDto);
+  }
+}