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import { VNode } from "preact";
export const INTERNAL_PREFIX = "/_frsh";export const ASSET_CACHE_BUST_KEY = "__frsh_c";
export const IS_BROWSER = typeof document !== "undefined";
/** * Create a "locked" asset path. This differs from a plain path in that it is * specific to the current version of the application, and as such can be safely * served with a very long cache lifetime (1 year). */export function asset(path: string) {  if (!path.startsWith("/") || path.startsWith("//")) return path;  try {    const url = new URL(path, "https://freshassetcache.local");    if (      url.protocol !== "https:" || url.host !== "freshassetcache.local" ||      url.searchParams.has(ASSET_CACHE_BUST_KEY)    ) {      return path;    }    url.searchParams.set(ASSET_CACHE_BUST_KEY, __FRSH_BUILD_ID);    return url.pathname + url.search + url.hash;  } catch (err) {    console.warn(      `Failed to create asset() URL, falling back to regular path ('${path}'):`,      err,    );    return path;  }}
/** Apply the `asset` function to urls in a `srcset` attribute. */export function assetSrcSet(srcset: string): string {  if (srcset.includes("(")) return srcset; // Bail if the srcset contains complicated syntax.  const parts = srcset.split(",");  const constructed = [];  for (const part of parts) {    const trimmed = part.trimStart();    const leadingWhitespace = part.length - trimmed.length;    if (trimmed === "") return srcset; // Bail if the srcset is malformed.    let urlEnd = trimmed.indexOf(" ");    if (urlEnd === -1) urlEnd = trimmed.length;    const leading = part.substring(0, leadingWhitespace);    const url = trimmed.substring(0, urlEnd);    const trailing = trimmed.substring(urlEnd);    constructed.push(leading + asset(url) + trailing);  }  return constructed.join(",");}
export function assetHashingHook(  vnode: VNode<{    src?: string;    srcset?: string;    ["data-fresh-disable-lock"]?: boolean;  }>,) {  if (vnode.type === "img" || vnode.type === "source") {    const { props } = vnode;    if (props["data-fresh-disable-lock"]) return;    if (typeof props.src === "string") {      props.src = asset(props.src);    }    if (typeof props.srcset === "string") {      props.srcset = assetSrcSet(props.srcset);    }  }}