@tanstack/ai-mcp/dist/esm/events/managed.js

Host-side Model Context Protocol client for TanStack AI: discover and run MCP server tools, resources, and prompts in any adapter's chat() loop, with generated end-to-end types.

import { MCPEventConfigError } from "../errors.js";
import { isRecord } from "./value.js";
import { listEventDefinitions } from "./list.js";
//#region src/events/managed.ts
function isThenable(value) {
	return typeof value === "object" && value !== null && "then" in value && typeof value.then === "function";
}
/**
* Validate the object returned by `adapter.createAdapter`.
* `createAdapter` must be synchronous.
*
* @experimental
*/
function validateMCPEventOperations(value) {
	if (isThenable(value)) throw new MCPEventConfigError("createAdapter must return operations synchronously, not a Promise");
	if (!isRecord(value)) throw new MCPEventConfigError("createAdapter must return event operations");
	const subscribe = value.subscribe;
	const getSubscription = value.getSubscription;
	const listSubscriptions = value.listSubscriptions;
	const unsubscribe = value.unsubscribe;
	if (typeof getSubscription !== "function") throw new MCPEventConfigError("adapter operations missing getSubscription");
	if (typeof subscribe !== "function") throw new MCPEventConfigError("adapter operations missing subscribe");
	if (typeof listSubscriptions !== "function") throw new MCPEventConfigError("adapter operations missing listSubscriptions");
	if (typeof unsubscribe !== "function") throw new MCPEventConfigError("adapter operations missing unsubscribe");
	return {
		subscribe(input) {
			return subscribe.call(value, input);
		},
		getSubscription(id) {
			return getSubscription.call(value, id);
		},
		listSubscriptions() {
			return listSubscriptions.call(value);
		},
		unsubscribe(id) {
			return unsubscribe.call(value, id);
		}
	};
}
/**
* Managed-mode events API. Subscribe operations go to the adapter; `list()` is MCP.
*
* @experimental
*/
function createManagedMCPEvents(ctx, operations) {
	return {
		list(options) {
			return listEventDefinitions(ctx, options?.signal);
		},
		subscribe: (input) => operations.subscribe(input),
		getSubscription: (id) => operations.getSubscription(id),
		listSubscriptions: () => operations.listSubscriptions(),
		unsubscribe: (id) => operations.unsubscribe(id)
	};
}
//#endregion
export { createManagedMCPEvents, validateMCPEventOperations };

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