Add helpers and types for BFF API

lib/api/cmFetch.ts

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+import { RequestInit } from "next/dist/server/web/spec-extension/request";
+
+const FRONTEND_URL = process.env.FRONTEND_URL;
+
+export async function cmFetch<T>(
+  bffUrl: string | URL,
+  options?: RequestInit,
+): Promise<T> {
+  const response = await fetch(`${FRONTEND_URL}/${bffUrl}`, options);
+
+  if (!response.ok) {
+    throw new Error("Request failed");
+  }
+
+  return response.json();
+}

lib/api/helpers/services.ts

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+import { cmFetch } from "../cmFetch";
+import { Service } from "../types";
+
+export async function getServices() {
+  return cmFetch<Service[]>(`/api/services`);
+}
+
+export async function getService(id: number) {
+  return cmFetch<Service>(`/api/services/${id}`);
+}
+
+export async function createService(service: Service) {
+  return cmFetch<Service>(`/api/services`, {
+    method: "POST",
+    headers: {
+      "Content-Type": "application/json",
+    },
+    body: JSON.stringify(service),
+  });
+}
+
+export async function deleteService(id: number) {
+  return cmFetch<Service>(`/api/services/${id}`, {
+    method: "DELETE",
+  });
+}

lib/api/helpers/users.ts

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+export async function getUsers() {
+  const response = await fetch("/api/users");
+  if (!response.ok) {
+    throw new Error(`Response status: ${response.status}`);
+  }
+
+  return response.json();
+}
+
+export async function getUser(id: number) {
+  const response = await fetch(`/api/users/${id}`);
+
+  if (!response.ok) {
+    throw new Error(`Response status: ${response.status}`);
+  }
+
+  return response.json();
+}

lib/api/types.ts

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+export interface User {
+  id: number | null;
+
+  username: string;
+
+  authority: number;
+}
+
+export interface Service {
+  id: number | null;
+
+  title: string;
+
+  description: string | null;
+
+  priority: number;
+
+  link: string;
+}
+
+export interface Project {
+  id: number | null;
+
+  parent_id: number | null;
+
+  title: string;
+
+  content: string | null;
+}