Function buildAnthropicMessageContent

apps/sim/providers/attachments.ts:468–525

(
  content: string | null | undefined,
  files: UserFile[] | undefined,
  providerId: ProviderId | string
)

}

export function buildAnthropicMessageContent(
  content: string | null | undefined,
  files: UserFile[] | undefined,
  providerId: ProviderId | string
): Anthropic.Messages.ContentBlockParam[] {
  const parts: Anthropic.Messages.ContentBlockParam[] = []
  if (content) {
    parts.push({ type: 'text', text: content } satisfies Anthropic.Messages.TextBlockParam)
  }

  for (const attachment of prepareProviderAttachments(files, providerId)) {
    if (attachment.contentType === 'image') {
      parts.push({
        type: 'image',
        source: attachment.remoteUrl
          ? ({ type: 'url', url: attachment.remoteUrl } satisfies Anthropic.Messages.URLImageSource)
          : ({
              type: 'base64',
              media_type: attachment.providerMimeType as AnthropicImageMediaType,
              data: attachment.base64 ?? '',
            } satisfies Anthropic.Messages.Base64ImageSource),
      } satisfies Anthropic.Messages.ImageBlockParam)
    } else if (attachment.remoteUrl) {
      if (attachment.mimeType !== PDF_MIME_TYPE) {
        throw new Error(
          `Document "${attachment.filename}" (${attachment.mimeType}) is too large to send to provider "${providerId}". Only PDFs and images are supported above the inline limit — convert it to PDF or reduce its size.`
        )
      }
      parts.push({
        type: 'document',
        source: { type: 'url', url: attachment.remoteUrl },
        title: attachment.filename,
      } satisfies Anthropic.Messages.DocumentBlockParam)
    } else if (attachment.text) {
      parts.push({
        type: 'document',
        source: {
          type: 'text',
          media_type: 'text/plain',
          data: attachment.text,
        },
        title: attachment.filename,
      } satisfies Anthropic.Messages.DocumentBlockParam)
    } else {
      parts.push({
        type: 'document',
        source: {
          type: 'base64',
          media_type: 'application/pdf',
          data: attachment.base64 ?? '',
        },
        title: attachment.filename,
      } satisfies Anthropic.Messages.DocumentBlockParam)
    }
  }

  return parts
}