Function normalizeFileInput

apps/sim/blocks/utils.ts:574–606

(
  fileParam: unknown,
  options?: { single?: boolean; errorMessage?: string }
)

  options?: { single?: false }
): object[] | undefined
export function normalizeFileInput(
  fileParam: unknown,
  options?: { single?: boolean; errorMessage?: string }
): object | object[] | undefined {
  if (!fileParam) return undefined

  if (typeof fileParam === 'string') {
    try {
      fileParam = JSON.parse(fileParam)
    } catch {
      return undefined
    }
  }

  let files: object[] | undefined

  if (Array.isArray(fileParam)) {
    files = fileParam.length > 0 ? fileParam : undefined
  } else if (typeof fileParam === 'object' && fileParam !== null) {
    files = [fileParam]
  }

  if (!files) return undefined

  if (options?.single) {
    if (files.length > 1) {
      throw new Error(options.errorMessage ?? DEFAULT_MULTIPLE_FILES_ERROR)
    }
    return files[0]
  }

  return files
}

/**
 * Block types that are built-in to the platform (as opposed to third-party integrations).