Function asImagePrompt

examples/ts-react-media/src/lib/server-functions.ts:31–37

* Narrows a wire `MediaPrompt` to a text + image prompt for image-conditioned * models, throwing on any other part kind (video/audio) so unsupported inputs * fail fast rather than being silently dropped.

(prompt: MediaPrompt)

 * fail fast rather than being silently dropped.
 */
function asImagePrompt(prompt: MediaPrompt): ImagePrompt {
  if (typeof prompt === 'string') return prompt
  return prompt.map((part) => {
    if (part.type === 'text' || part.type === 'image') return part
    throw new Error(`Unsupported prompt part for image model: ${part.type}`)
  })
}

/**
 * Narrows a wire `MediaPrompt` to a text-only prompt, throwing if any image /