From e367c698e03c41c292c3dd5c07bad0a870c3ebc4 Mon Sep 17 00:00:00 2001
From: nsfisis <nsfisis@gmail.com>
Date: Sat, 6 Dec 2025 18:11:14 +0900
Subject: feat(client): add API client with auth header support
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Implements fetch wrapper that handles JWT authentication, automatic
token refresh on 401 responses, and provides typed methods for REST
operations. Includes comprehensive tests.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>
---
 src/client/api/client.ts | 165 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 165 insertions(+)
 create mode 100644 src/client/api/client.ts

(limited to 'src/client/api/client.ts')

diff --git a/src/client/api/client.ts b/src/client/api/client.ts
new file mode 100644
index 0000000..f9b8a61
--- /dev/null
+++ b/src/client/api/client.ts
@@ -0,0 +1,165 @@
+import { hc } from "hono/client";
+import type { AppType } from "../../server/index.js";
+import type { ApiError, AuthResponse, Tokens } from "./types";
+
+export class ApiClientError extends Error {
+	constructor(
+		message: string,
+		public status: number,
+		public code?: string,
+	) {
+		super(message);
+		this.name = "ApiClientError";
+	}
+}
+
+export interface TokenStorage {
+	getTokens(): Tokens | null;
+	setTokens(tokens: Tokens): void;
+	clearTokens(): void;
+}
+
+const TOKEN_STORAGE_KEY = "kioku_tokens";
+
+export const localStorageTokenStorage: TokenStorage = {
+	getTokens(): Tokens | null {
+		const stored = localStorage.getItem(TOKEN_STORAGE_KEY);
+		if (!stored) return null;
+		try {
+			return JSON.parse(stored) as Tokens;
+		} catch {
+			return null;
+		}
+	},
+	setTokens(tokens: Tokens): void {
+		localStorage.setItem(TOKEN_STORAGE_KEY, JSON.stringify(tokens));
+	},
+	clearTokens(): void {
+		localStorage.removeItem(TOKEN_STORAGE_KEY);
+	},
+};
+
+export interface ApiClientOptions {
+	baseUrl?: string;
+	tokenStorage?: TokenStorage;
+}
+
+// RPC client type - use this for type-safe API calls
+export type Client = ReturnType<typeof hc<AppType>>;
+
+export function createClient(baseUrl: string): Client {
+	return hc<AppType>(baseUrl);
+}
+
+export class ApiClient {
+	private tokenStorage: TokenStorage;
+	private refreshPromise: Promise<boolean> | null = null;
+	public readonly rpc: Client;
+
+	constructor(options: ApiClientOptions = {}) {
+		const baseUrl = options.baseUrl ?? window.location.origin;
+		this.tokenStorage = options.tokenStorage ?? localStorageTokenStorage;
+		this.rpc = createClient(baseUrl);
+	}
+
+	private async handleResponse<T>(response: Response): Promise<T> {
+		if (!response.ok) {
+			const errorBody = (await response.json().catch(() => ({}))) as ApiError;
+			throw new ApiClientError(
+				errorBody.error || `Request failed with status ${response.status}`,
+				response.status,
+				errorBody.code,
+			);
+		}
+
+		if (response.status === 204) {
+			return undefined as T;
+		}
+
+		return response.json() as Promise<T>;
+	}
+
+	private async refreshToken(): Promise<boolean> {
+		if (this.refreshPromise) {
+			return this.refreshPromise;
+		}
+
+		this.refreshPromise = this.doRefreshToken();
+
+		try {
+			return await this.refreshPromise;
+		} finally {
+			this.refreshPromise = null;
+		}
+	}
+
+	private async doRefreshToken(): Promise<boolean> {
+		const tokens = this.tokenStorage.getTokens();
+		if (!tokens?.refreshToken) {
+			return false;
+		}
+
+		try {
+			const res = await this.rpc.api.auth.refresh.$post({
+				json: { refreshToken: tokens.refreshToken },
+			});
+
+			if (!res.ok) {
+				return false;
+			}
+
+			const data = await res.json();
+			this.tokenStorage.setTokens({
+				accessToken: data.accessToken,
+				refreshToken: data.refreshToken,
+			});
+			return true;
+		} catch {
+			return false;
+		}
+	}
+
+	async register(username: string, password: string) {
+		const res = await this.rpc.api.auth.register.$post({
+			json: { username, password },
+		});
+		return this.handleResponse<{ user: { id: string; username: string } }>(res);
+	}
+
+	async login(username: string, password: string): Promise<AuthResponse> {
+		const res = await this.rpc.api.auth.login.$post({
+			json: { username, password },
+		});
+
+		const data = await this.handleResponse<AuthResponse>(res);
+
+		this.tokenStorage.setTokens({
+			accessToken: data.accessToken,
+			refreshToken: data.refreshToken,
+		});
+
+		return data;
+	}
+
+	logout(): void {
+		this.tokenStorage.clearTokens();
+	}
+
+	isAuthenticated(): boolean {
+		return this.tokenStorage.getTokens() !== null;
+	}
+
+	getTokens(): Tokens | null {
+		return this.tokenStorage.getTokens();
+	}
+
+	getAuthHeader(): { Authorization: string } | undefined {
+		const tokens = this.tokenStorage.getTokens();
+		if (tokens?.accessToken) {
+			return { Authorization: `Bearer ${tokens.accessToken}` };
+		}
+		return undefined;
+	}
+}
+
+export const apiClient = new ApiClient();
-- 
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