backend/middlewares/validateParticipantID.js

const Participant = require('../api/models/participantModel');

async function validateParticipantID(req, res, next) {
	const { id } = req.params;

	try {
		const participant = await Participant.getParticipantById(id);
		if (typeof participant == 'undefined') {
			res.status(404).json({
				message: `Participant with id ${id} doesn't exist.`,
			});
		} else {
			next();
		}
	} catch (error) {
		res.status(500).json({
			message: `Failed to get participant with id ${id}`,
			error,
		});
	}
}

exports.validateParticipantID = validateParticipantID;