DONE: add customer pages, implement auth on teller page

fe/web/customer-app/lib/api.ts

@@ -0,0 +1,82 @@
+import { SERVER_URL } from "./constants";
+
+export type Tenant = {
+  id: number;
+  code: string;
+  name: string;
+  welcomeMessage: string;
+  font: string | null;
+  logo?: { id: number; base64Logo: string | null } | null;
+};
+
+export type Branch = {
+  id: number;
+  name: string;
+  tellerStations: { id: number; name: string }[];
+};
+
+export type Service = {
+  id: number;
+  name: string;
+};
+
+export type Ticket = {
+  id: number;
+  number: string;
+  createdAt: string;
+  service: Service;
+  branch: Branch;
+  station: { id: number; name: string } | null;
+};
+
+export type TicketResponse = {
+  ticket: Ticket;
+  stations: { id: number; name: string }[];
+};
+
+async function request<T>(path: string, init?: RequestInit): Promise<T> {
+  const response = await fetch(`${SERVER_URL}${path}`, {
+    ...init,
+    headers: {
+      "Content-Type": "application/json",
+      ...(init?.headers ?? {}),
+    },
+  });
+
+  if (!response.ok) {
+    throw new Error(`Request failed (${response.status}) for ${path}`);
+  }
+
+  return response.json() as Promise<T>;
+}
+
+export function getTenant(code: string) {
+  return request<Tenant>(`/api/v1/tenants/${encodeURIComponent(code)}`);
+}
+
+export function getBranches(tenantCode: string) {
+  return request<Branch[]>(
+    `/api/v1/branches/${encodeURIComponent(tenantCode)}`
+  );
+}
+
+export function getBranchServices(tenantCode: string, branchId: number) {
+  return request<Service[]>(
+    `/api/v1/branches/${encodeURIComponent(tenantCode)}/${branchId}/services`
+  );
+}
+
+export function createTicket(input: {
+  branchId: number;
+  serviceId: number;
+  deviceToken: string;
+}) {
+  return request<TicketResponse>("/api/v1/tickets", {
+    method: "POST",
+    body: JSON.stringify(input),
+  });
+}
+
+export function getTicketById(ticketId: number | string) {
+  return request<Ticket>(`/api/v1/tickets/${ticketId}`);
+}