refactor(data): merge DTO models into schemas

src/data/schemas/chat/response/chat_history_response.ts

@@ -9,7 +9,7 @@ import {
   booleanOrFalse,
   numberOrZero,
 } from "../../nullable-defaults";
-import { ChatMessageSchema } from "../chat_message";
+import { ChatMessage, ChatMessageSchema } from "../chat_message";
 
 export const ChatHistoryResponseSchema = z.object({
   messages: arrayOrEmpty(ChatMessageSchema),
@@ -24,3 +24,30 @@ export const ChatHistoryResponseSchema = z.object({
 
 export type ChatHistoryResponseInput = z.input<typeof ChatHistoryResponseSchema>;
 export type ChatHistoryResponseData = z.output<typeof ChatHistoryResponseSchema>;
+
+export class ChatHistoryResponse {
+  declare readonly messages: ChatMessage[];
+  declare readonly total: number;
+  declare readonly limit: number;
+
+  private constructor(input: ChatHistoryResponseInput) {
+    const data = ChatHistoryResponseSchema.parse(input);
+    Object.assign(this, {
+      ...data,
+      messages: data.messages.map((m) => ChatMessage.from(m)),
+    });
+    Object.freeze(this);
+  }
+
+  static from(input: ChatHistoryResponseInput): ChatHistoryResponse {
+    return new ChatHistoryResponse(input);
+  }
+
+  static fromJson(json: unknown): ChatHistoryResponse {
+    return ChatHistoryResponse.from(json as ChatHistoryResponseInput);
+  }
+
+  toJson(): ChatHistoryResponseData {
+    return ChatHistoryResponseSchema.parse(this);
+  }
+}