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12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970import { error, type NumericRange } from "@sveltejs/kit";import { ClientResponseError } from "$lib/api/client";
export const httpStatusFor = (cause: unknown): number => { if (cause instanceof ClientResponseError) { if (cause.status >= 400 && cause.status <= 599) return cause.status; switch (cause.error) { case "RecordNotFound": return 404; case "InvalidRequest": return 400; case "UpstreamFailed": case "UpstreamGone": case "InvalidRecord": return 502; case "Overloaded": return 503; default: return 500; } } return 500;};
export const errorMessage = (cause: unknown, fallbackMessage = "Request failed"): string => cause instanceof ClientResponseError ? (cause.description ?? cause.error) : fallbackMessage;
export const toHttpError = (cause: unknown, fallbackMessage = "Request failed"): never => { const status = httpStatusFor(cause) as NumericRange<400, 599>; throw error(status, errorMessage(cause, fallbackMessage));};
export const parallel = async <T extends Record<string, Promise<unknown>>>( tasks: T): Promise<{ [K in keyof T]: Awaited<T[K]> }> => { const keys = Object.keys(tasks) as (keyof T)[]; const values = await Promise.all(keys.map((key) => tasks[key])); const out = {} as { [K in keyof T]: Awaited<T[K]> }; keys.forEach((key, index) => { out[key] = values[index] as Awaited<T[keyof T]>; }); return out;};
// unhandled rejections kill node if nothing on the page awaits the promiseexport const stream = <T>(promise: Promise<T>): Promise<T> => { promise.catch(() => {}); return promise;};
export const orNull = <T>(promise: Promise<T>): Promise<T | null> => promise.catch(() => null);
// per-request promise de-dupe cache.export interface RequestCache { run<T>(key: string, load: () => Promise<T>): Promise<T>;}
export const createRequestCache = (): RequestCache => { const entries = new Map<string, Promise<unknown>>(); return { run<T>(key: string, load: () => Promise<T>): Promise<T> { const existing = entries.get(key) as Promise<T> | undefined; if (existing) return existing; const pending = load(); entries.set(key, pending); return pending; } };};