IP Find

export function isObject(value: unknown): value is object { return typeof value === "object" && value !== null && !Array.isArray(value); } export class IPFindError extends Error { statusCode?: number; subErrors?: string[]; constructor(message: string, statusCode?: number) { super(message); this.name = "IPFindError"; this.statusCode = statusCode; } toString() { return ( `${this.name}: ${this.message}` + (this.subErrors?.length ? `\n - ${this.subErrors.join("\n - ")}` : "") ); } } export async function createIPFindError(res: Response): Promise<IPFindError> { try { const body: unknown = await res.clone().json(); if ( isObject(body) && "error" in body && typeof (body as any).error === "string" ) { const err = new IPFindError( (body as any).error || res.statusText, res.status ); return err; } } catch (err: unknown) { // Do nothing. } return new IPFindError(res.statusText, res.status); }