core/apps/webapp/app/routes/api.v1.integrations.tsx

import { type LoaderFunctionArgs, json } from "@remix-run/node";
import { oauthIntegrationService } from "~/services/oauthIntegration.server";
import { authenticateOAuthRequest } from "~/services/apiAuth.server";

/**
 * API endpoint for OAuth apps to get their connected integrations
 * GET /api/oauth/integrations
 * Authorization: Bearer <oauth_access_token>
 */
export const loader = async ({ request }: LoaderFunctionArgs) => {
  try {
    // Authenticate OAuth request and verify integration scope
    const authResult = await authenticateOAuthRequest(request, ["integration"]);
    
    if (!authResult.success) {
      return json(
        { 
          error: "unauthorized", 
          error_description: authResult.error 
        },
        { status: 401 }
      );
    }

    // Get connected integrations for this client and user
    const integrations = await oauthIntegrationService.getConnectedIntegrations({
      clientId: authResult.clientId!,
      userId: authResult.user!.id,
    });

    return json({
      integrations,
      count: integrations.length,
    });

  } catch (error) {
    console.error("Error fetching OAuth integrations:", error);
    return json(
      { 
        error: "server_error", 
        error_description: "Internal server error" 
      },
      { status: 500 }
    );
  }
};

// Method not allowed for non-GET requests
export const action = async () => {
  return json(
    { 
      error: "method_not_allowed", 
      error_description: "Only GET requests are allowed" 
    },
    { status: 405 }
  );
};