Function getOrCreateBlobUrl

apps/sim/lib/pptx-renderer/utils/media.ts:53–67

(
  mediaPath: string,
  data: Uint8Array | ArrayBuffer,
  cache: Map<string, string>
)

 * @returns The blob URL string
 */
export function getOrCreateBlobUrl(
  mediaPath: string,
  data: Uint8Array | ArrayBuffer,
  cache: Map<string, string>
): string {
  let url = cache.get(mediaPath)
  if (!url) {
    const mime = getMimeType(mediaPath)
    const blobPart = data instanceof ArrayBuffer ? data : copyToArrayBuffer(data)
    const blob = new Blob([blobPart], { type: mime })
    url = URL.createObjectURL(blob)
    cache.set(mediaPath, url)
  }
  return url
}

function copyToArrayBuffer(data: Uint8Array): ArrayBuffer {
  const copy = new Uint8Array(data.byteLength)