Function resolveImageRequestUrl

src/utils/urlImageFiles.ts:68–80

* Resolve the request URL and display filename for an image. When an explicit * URL is given (a per-image mapping), it is used verbatim — already absolute and * encoded — and must not pass through buildImageUrl again. Otherwise the URL is * built from the base + COLMAP name. Returns null when nei

(
  imageUrlBase: string | null,
  imageName: string,
  explicitUrl?: string
)

 * built from the base + COLMAP name. Returns null when neither is available.
 */
function resolveImageRequestUrl(
  imageUrlBase: string | null,
  imageName: string,
  explicitUrl?: string
): { url: string; filename: string } | null {
  if (explicitUrl) {
    return { url: explicitUrl, filename: getFilenameFromUrl(explicitUrl) };
  }
  if (!imageUrlBase) {
    return null;
  }
  return buildImageUrl(imageUrlBase, imageName);
}

/**
 * Fetch an image from URL and cache it.