/**
* @file Budget Resource Handler
* @description Implements resource handlers for Brex budget API endpoints
*/
import { ReadResourceRequestSchema } from "@modelcontextprotocol/sdk/types.js";
import { logDebug, logError } from '../utils/logger.js';
import { ResourceTemplate } from '../models/resourceTemplate.js';
import { BrexClient } from '../services/brex/client.js';
import { parseQueryParams } from '../models/common.js';
import { Budget, isBudget } from '../models/budget.js';
/**
* Get Brex client
*/
function getBrexClient(): BrexClient {
return new BrexClient();
}
/**
* Resource template for budget API
*/
const budgetsTemplate = new ResourceTemplate('brex://budgets{/id}');
/**
* Register the budget resource handler
* @param server - MCP server instance
*/
export const registerBudgetsResource = (server: any) => {
server.setRequestHandler(ReadResourceRequestSchema, async (request: any, extra: any) => {
const { uri } = request;
// Check if we can handle this URI
if (!uri.startsWith('brex://budgets')) {
return { handled: false };
}
logDebug(`Handling budget request for URI: ${uri}`);
try {
const brexClient = getBrexClient();
// Use parse instead of match to get URI parameters
const params = budgetsTemplate.parse(uri);
const id = params.id;
if (id) {
// Get single budget
logDebug(`Fetching single budget with ID: ${id}`);
const budget = await brexClient.getBudget(id);
if (!budget || !isBudget(budget)) {
throw new Error(`Invalid budget data received for ID: ${id}`);
}
return {
handled: true,
resource: budget
};
} else {
// List budgets with pagination
logDebug('Fetching budget list');
const queryParams = parseQueryParams(uri);
const budgetsResponse = await brexClient.getBudgets({
cursor: queryParams.cursor,
limit: queryParams.limit ? parseInt(queryParams.limit, 10) : undefined,
parent_budget_id: queryParams.parent_budget_id,
spend_budget_status: queryParams.spend_budget_status as any
});
return {
handled: true,
resource: budgetsResponse,
};
}
} catch (error) {
logError(`Error handling budget request: ${error instanceof Error ? error.message : String(error)}`);
throw error;
}
});
};
export default registerBudgetsResource;
