добавлены классы restapi

src/api/ApiClient.js

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+import axios from "axios";
+import { Toast } from "react-bootstrap";
+
+export class HttpError extends Error {
+    constructor(message = "") {
+        super(message);
+        this.name = "HttpError";
+        Object.setPrototypeOf(this, new.target.prototype);
+        Toast.error(message, { id: "HttpError" });
+    }
+}
+
+function responseHandler(response) {
+    if (response.status === 200 || response.status === 201) {
+        const data = response?.data;
+        if (!data) {
+            throw new HttpError("API Error. No data!");
+        }
+        return data;
+    }
+    throw new HttpError(`API Error! Invalid status code ${response.status}!`);
+}
+
+function responseErrorHandler(error) {
+    if (error === null) {
+        throw new Error("Unrecoverable error!! Error is null!");
+    }
+    Toast.error(error.message, { id: "AxiosError" });
+    return Promise.reject(error.message);
+}
+
+export const ApiClient = axios.create({
+    baseURL: "http://localhost:8081/",
+    timeout: "3000",
+    headers: {
+        Accept: "application/json",
+    },
+});
+
+ApiClient.interceptors.response.use(responseHandler, responseErrorHandler);

src/api/ApiService.js

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+import { ApiClient } from "./ApiClient";
+
+class ApiService {
+    constructor(url) {
+        this.url = url;
+    }
+
+    async getAll() {
+        return ApiClient.get(`${this.url}`);
+    }
+
+    // eslint-disable-next-line no-dupe-class-members
+    async getAll(expand) {
+        return ApiClient.get(`${this.url}${expand || ""}`);
+    }
+
+    async get(id, expand) {
+        return ApiClient.get(`${this.url}/${id}${expand || ""}`);
+    }
+
+    async create(body) {
+        return ApiClient.post(this.url, body);
+    }
+
+    async update(id, body) {
+        return ApiClient.put(`${this.url}/${id}`, body);
+    }
+
+    async delete(id) {
+        return ApiClient.delete(`${this.url}/${id}`);
+    }
+}
+
+export default ApiService;

src/service/PostsApiService.js

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+import ApiService from "../api/ApiService.js";
+
+const PostsApiService = new ApiService("posts");
+
+export default PostsApiService;

src/service/UsersApiService.js

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+import ApiService from "../api/ApiService.js";
+
+const UsersApiService = new ApiService("users");
+
+export default UsersApiService;