app/Middleware/SilentAuth.ts


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import { HttpContextContract } from '@ioc:Adonis/Core/HttpContext';

/**
 * Silent auth middleware can be used as a global middleware to silent check
 * if the user is logged-in or not.
 *
 * The request continues as usual, even when the user is not logged-in.
 */
export default class SilentAuthMiddleware {
  /**
   * Handle request
   */
  public async handle(
    { auth }: HttpContextContract,
    next: () => Promise<void>,
  ) {
    /**
     * Check if user is logged-in or not. If yes, then `ctx.auth.user` will be
     * set to the instance of the currently logged in user.
     */
    await auth.check();
    await next();
  }
}