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import { getCurrentLocale } from '@/i18n';
import { AuthSessionResponse, ErrorResponse } from '@/models/auth';
export class ApiError extends Error {
code: string;
status: number;
details?: Record<string, string>;
constructor(status: number, body: ErrorResponse) {
super(body.error.message);
this.name = 'ApiError';
this.code = body.error.code;
this.status = status;
this.details = body.error.details;
}
}
async function handleErrorResponse(response: Response): Promise<never> {
try {
const errorBody: ErrorResponse = await response.json();
throw new ApiError(response.status, errorBody);
} catch (err) {
if (err instanceof ApiError) throw err;
throw new ApiError(response.status, {
error: { code: 'network_error', message: `Request failed (${response.status})` },
});
}
}
// --- Token refresh manager ---
interface TokenRefreshManager {
getRefreshToken: () => string | null;
onRefreshSuccess: (accessToken: string, refreshToken: string, username: string, role: AuthSessionResponse['user']['role']) => void;
onRefreshFailure: () => void;
}
let tokenRefreshManager: TokenRefreshManager | null = null;
let pendingRefresh: Promise<string> | null = null;
function buildJsonHeaders(extraHeaders: Record<string, string> = {}): Record<string, string> {
return {
'Content-Type': 'application/json',
'Accept-Language': getCurrentLocale(),
...extraHeaders,
};
}
export function setTokenRefreshManager(manager: TokenRefreshManager | null): void {
tokenRefreshManager = manager;
}
async function attemptTokenRefresh(): Promise<string> {
if (pendingRefresh) return pendingRefresh;
const doRefresh = async (): Promise<string> => {
const refreshToken = tokenRefreshManager?.getRefreshToken();
if (!refreshToken) throw new Error('No refresh token available');
const response = await fetch(`${API_BASE_URL}/auth/refresh`, {
method: 'POST',
headers: buildJsonHeaders(),
body: JSON.stringify({ refresh_token: refreshToken }),
});
if (!response.ok) {
tokenRefreshManager?.onRefreshFailure();
await handleErrorResponse(response);
}
const session: AuthSessionResponse = await response.json();
tokenRefreshManager?.onRefreshSuccess(
session.access_token,
session.refresh_token,
session.user.username,
session.user.role,
);
return session.access_token;
};
pendingRefresh = doRefresh().finally(() => {
pendingRefresh = null;
});
return pendingRefresh;
}
// --- Public API helpers ---
export async function apiPost<T>(endpoint: string, body: unknown): Promise<T> {
const response = await fetch(`${API_BASE_URL}${endpoint}`, {
method: 'POST',
headers: buildJsonHeaders(),
body: JSON.stringify(body),
});
if (!response.ok) {
await handleErrorResponse(response);
}
if (response.status === 204) {
return undefined as T;
}
return response.json();
}
export async function apiGet<T>(endpoint: string): Promise<T> {
const response = await fetch(`${API_BASE_URL}${endpoint}`, {
method: 'GET',
headers: buildJsonHeaders(),
cache: 'no-store',
});
if (!response.ok) {
await handleErrorResponse(response);
}
return response.json();
}
// --- Authenticated API helpers (with silent token refresh on 401) ---
async function fetchWithAuth(
method: string,
endpoint: string,
token: string,
body?: unknown,
): Promise<Response> {
const headers: Record<string, string> = {
...buildJsonHeaders(),
Authorization: `Bearer ${token}`,
};
const init: RequestInit = { method, headers };
if (body !== undefined) init.body = JSON.stringify(body);
if (method === 'GET') init.cache = 'no-store';
return fetch(`${API_BASE_URL}${endpoint}`, init);
}
async function executeWithRefresh<T>(
method: string,
endpoint: string,
token: string,
body?: unknown,
): Promise<T> {
let response = await fetchWithAuth(method, endpoint, token, body);
if (response.status === 401 && tokenRefreshManager) {
const newToken = await attemptTokenRefresh();
response = await fetchWithAuth(method, endpoint, newToken, body);
}
if (!response.ok) {
await handleErrorResponse(response);
}
if (response.status === 204) {
return undefined as T;
}
return response.json();
}
export function apiGetAuth<T>(endpoint: string, token: string): Promise<T> {
return executeWithRefresh<T>('GET', endpoint, token);
}
export function apiPostAuth<T>(endpoint: string, body: unknown, token: string): Promise<T> {
return executeWithRefresh<T>('POST', endpoint, token, body);
}
export function apiPatchAuth<T>(endpoint: string, body: unknown, token: string): Promise<T> {
return executeWithRefresh<T>('PATCH', endpoint, token, body);
}
export function apiPutAuth<T>(endpoint: string, body: unknown, token: string): Promise<T> {
return executeWithRefresh<T>('PUT', endpoint, token, body);
}
export function apiDeleteAuth<T>(endpoint: string, token: string): Promise<T> {
return executeWithRefresh<T>('DELETE', endpoint, token);
}
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