Function convertMessageContent

core/util/messageConversion.ts:139–168

* Convert OpenAI message content to unified MessageContent format

(
  content: string | null | Array<any>,
)

 * Convert OpenAI message content to unified MessageContent format
 */
function convertMessageContent(
  content: string | null | Array<any>,
): MessageContent {
  if (content === null) {
    return "";
  }

  if (typeof content === "string") {
    return content;
  }

  if (Array.isArray(content)) {
    return content.map((part: any) => {
      if (part.type === "text") {
        return {
          type: "text" as const,
          text: part.text,
        };
      } else if (part.type === "image_url") {
        return {
          type: "imageUrl" as const,
          imageUrl: { url: part.image_url.url },
        };
      }
      throw new Error(`Unsupported content part type: ${part.type}`);
    });
  }

  throw new Error(`Unsupported content type: ${typeof content}`);
}

/**
 * Convert unified MessageContent to OpenAI format