@copilotkit/runtime/dist/service-adapters/langchain/langchain-adapter.mjs

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import "reflect-metadata";
import { __require } from "../../_virtual/_rolldown/runtime.mjs";
import { convertActionInputToLangChainTool, convertMessageToLangChainMessage, streamLangChainResponse } from "./utils.mjs";
import { randomUUID } from "@copilotkit/shared";

//#region src/service-adapters/langchain/langchain-adapter.ts
var LangChainAdapter = class {
	/**
	* To use LangChain as a backend, provide a handler function to the adapter with your custom LangChain logic.
	*/
	get name() {
		return "LangChainAdapter";
	}
	constructor(options) {
		this.options = options;
	}
	async process(request) {
		try {
			const { eventSource, model, actions, messages, runId, threadId: threadIdFromRequest } = request;
			const threadId = threadIdFromRequest ?? randomUUID();
			const result = await this.options.chainFn({
				messages: messages.map(convertMessageToLangChainMessage),
				tools: actions.map(convertActionInputToLangChainTool),
				model,
				threadId,
				runId
			});
			eventSource.stream(async (eventStream$) => {
				await streamLangChainResponse({
					result,
					eventStream$
				});
			});
			return { threadId };
		} finally {
			const { awaitAllCallbacks } = __require("@langchain/core/callbacks/promises");
			await awaitAllCallbacks();
		}
	}
};

//#endregion
export { LangChainAdapter };
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