// extractContent.js – turn any MCP ToolResult / PromptMessage into plain UI data
/**
* Flatten an MCP ToolResult or messages array into:
* { text: "...", attachments: [...] }
*
* • Concatenates all text snippets in order.
* • Puts non-text blobs (images, audio, json, etc.) in `attachments`.
* • Guaranteed to always return at least one property.
*/
export function extractContent(payload) {
if (!payload) return { text: "[empty]" };
/** Normalise input:
* - ToolResult: { content:[...], isError }
* - Prompt get : { messages:[{ role, content }] }
*/
const items = Array.isArray(payload.content)
? payload.content // ToolResult
: Array.isArray(payload.messages)
? payload.messages.map((m) => m.content) // Prompt
: [payload];
let text = "";
const attachments = [];
for (const c of items) {
if (!c) continue;
switch (c.type) {
case "text":
if (typeof c.text === "string") {
text += (text ? "\n" : "") + c.text;
}
break;
case "image":
case "audio":
case "video":
case "json":
default:
attachments.push(c); // keep the raw item for UI
}
}
return attachments.length ? { text, attachments } : { text };
}
