#2 Добавлена логика на запросы

src/services/messages.service.ts

+import {IMessage, IMessages} from "@/interfaces/IMessages.interface";
+import {randomUUID} from "crypto";
+import {readFileSync, writeFileSync} from "node:fs";
+import path from 'path'
+
+export class MessagesService {
+  private filePath: string;
+  private messages: IMessages[] = [];
+
+  constructor() {
+    this.filePath = path.resolve(__dirname,   `../../data/messages.json`);
+    this.restore()
+  }
+
+  public getAllMessages = (): IMessages[] => {
+    return this.messages.length > 30 ? this.messages.slice(-30) : this.messages
+  };
+
+  public createMessages = (data: IMessage): IMessages | undefined => {
+    const message = {
+      id: randomUUID(),
+      message: data.message,
+      author: data.author,
+      datetime: new Date()
+    };
+    this.messages.push(message);
+    this.save()
+    return message
+  };
+  public getMessage = (date: string): IMessage[] =>{
+    console.log(new Date(date), new Date(this.messages[this.messages.length-1].datetime))
+    if (new Date(date).getTime() !== new Date(this.messages[this.messages.length-1].datetime).getTime()){
+      return this.messages.length > 30 ? this.messages.slice(-30) : this.messages
+    }else{
+      return []
+    }
+  }
+
+  private restore = () =>{
+    try {
+      const saveData = readFileSync(this.filePath, {encoding: "utf-8"});
+      this.messages = JSON.parse(saveData)
+
+    }catch (e: any){
+      console.log(e)
+    }
+  }
+  private save = () =>{
+    writeFileSync(this.filePath,  JSON.stringify(this.messages), {encoding: "utf-8"})
+  }
+}