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import type {
LocationSearchParams,
LocationSearchResponse,
RouteParams,
RouteResponse,
EvRouteParams,
EvRouteResponse,
EvCarsResponse,
IncidentsResponse,
} from "./types.js";
export class AnwbApiError extends Error {
constructor(
message: string,
readonly status: number,
readonly details?: unknown,
) {
super(message);
}
}
export interface RetryOptions {
maxRetries: number;
}
const DEFAULT_RETRY: RetryOptions = { maxRetries: 3 };
const sleep = (ms: number): Promise<void> =>
new Promise((resolve) => setTimeout(resolve, ms));
export class AnwbClient {
private readonly baseUrl: string;
private readonly callerId: string;
private readonly retry: RetryOptions;
private readonly cache: TtlCache;
private readonly cachingEnabled: boolean;
constructor(
callerId = "anwb-mcp",
baseUrl = "https://api.anwb.nl",
cacheTtlMs?: number,
retry: RetryOptions = DEFAULT_RETRY,
) {
this.baseUrl = baseUrl.replace(/\/$/, "");
this.callerId = callerId;
this.retry = retry;
this.cachingEnabled = cacheTtlMs !== 0;
this.cache = new TtlCache(cacheTtlMs ?? 120_000);
}
private async cachedRequest<T>(cacheKey: string, ttlMs: number, fetcher: () => Promise<T>): Promise<T> {
if (!this.cachingEnabled || ttlMs <= 0) return fetcher();
const cached = this.cache.get<T>(cacheKey);
if (cached !== undefined) return cached;
const result = await fetcher();
this.cache.set(cacheKey, result, ttlMs);
return result;
}
// --- Location Search ---
async findLocations(params: LocationSearchParams): Promise<LocationSearchResponse> {
const query = new URLSearchParams();
query.set("freetext", params.freetext);
if (params.limit !== undefined) query.set("limit", String(params.limit));
if (params.area) query.set("area", params.area);
if (params.idxSet) query.set("idxSet", params.idxSet.join(","));
query.set("c", "false");
const queryString = query.toString();
return this.cachedRequest(
`locations:${queryString}`,
300_000,
() => this.request<LocationSearchResponse>(`/routing/route/v1/find-locations?${queryString}`),
);
}
// --- Route ---
async getRoute(params: RouteParams): Promise<RouteResponse> {
const mode = params.transportMode ?? "car";
const query = new URLSearchParams();
query.set("locations", params.locations);
if (mode === "car" || mode === "caravan") {
query.set("routeType", params.routeType ?? "fastest");
query.set("traffic", String(params.traffic ?? true));
if (params.tollInfo !== undefined) query.set("tollInfo", String(params.tollInfo));
} else {
Iif (params.routeType) query.set("routeType", params.routeType);
}
if (params.avoid && params.avoid.length > 0) query.set("avoid", params.avoid.join(","));
if (params.includeAlternatives !== undefined) query.set("includeAlternatives", String(params.includeAlternatives));
if (mode === "bike" && params.transportSubtype) query.set("transportSubtype", params.transportSubtype);
const queryString = query.toString();
return this.cachedRequest(
`route:${mode}:${queryString}`,
60_000,
() => this.request<RouteResponse>(`/routing/route/v1/route/${mode}?${queryString}`),
);
}
// --- EV Route ---
async getEvRoute(params: EvRouteParams): Promise<EvRouteResponse> {
const query = new URLSearchParams();
query.set("locations", params.locations);
query.set("carId", params.carId);
query.set("capacity", String(params.capacity));
query.set("stateOfCharge", String(params.stateOfCharge));
if (params.finalStateOfCharge !== undefined) query.set("finalStateOfCharge", String(params.finalStateOfCharge));
if (params.complexity !== undefined) query.set("complexity", String(params.complexity));
const queryString = query.toString();
return this.cachedRequest(
`route:ev:${queryString}`,
60_000,
() => this.request<EvRouteResponse>(`/routing/route/v1/route/ev?${queryString}`),
);
}
// --- EV Cars ---
async getEvCars(): Promise<EvCarsResponse> {
return this.cachedRequest(
"ev-cars",
3_600_000,
() => this.request<EvCarsResponse>("/routing/route/v1/electric-vehicles"),
);
}
// --- Incidents ---
async getIncidents(): Promise<IncidentsResponse> {
return this.cachedRequest(
"incidents",
60_000,
() => this.request<IncidentsResponse>("/routing/v1/incidents/incidents-desktop", undefined, false),
);
}
// --- Private ---
private static async parseBody(response: Response): Promise<unknown> {
const contentType = response.headers.get("content-type") ?? "";
return contentType.includes("application/json")
? response.json().catch(() => null)
: response.text().catch(() => "");
}
private async request<T>(path: string, init?: RequestInit, requireCallerId = true): Promise<T> {
const headers = new Headers(init?.headers);
if (requireCallerId) {
headers.set("x-anwb-caller-id", this.callerId);
}
const url = `${this.baseUrl}${path}`;
const requestInit: RequestInit = { ...init, headers };
const maxRetries = Math.max(0, this.retry.maxRetries);
for (let attempt = 0; attempt <= maxRetries; attempt++) {
const response = await fetch(url, requestInit);
if (response.ok) {
return await AnwbClient.parseBody(response) as T;
}
if (response.status === 429 && attempt < maxRetries) {
const retryAfter = response.headers.get("retry-after");
const delayMs = retryAfter
? parseInt(retryAfter, 10) * 1000
: Math.pow(2, attempt) * 1000;
await sleep(delayMs);
continue;
}
throw new AnwbApiError(
`ANWB API request failed: ${response.status} ${response.statusText}`,
response.status,
await AnwbClient.parseBody(response),
);
}
/* v8 ignore next */
throw new Error("Retry loop exited unexpectedly");
}
}
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