Kekkai/server/routes/getRate.js

const rate = require('../../shared/database/src/main.js');

module.exports = async function getRateRoute(fastify) {
    fastify.get('/api/getRate/', async function (req, res) {
        const query = req.query;
        if (!query['from_currency'] || !query['conv_currency']) {
            return res.status(400).send({
                status: 400,
                message:
                    'The from_currency and conv_currency fields are required',
            });
        }
        let rate_res;

        try {
            if (query['date'])
                rate_res = await rate.getDay(
                    query['from_currency'],
                    query['conv_currency'],
                    query['date'],
                    query['conv_amount'] ? query['conv_amount'] : 1
                );
            else if (query['start_date'] && query['end_date'])
                rate_res = await rate.getPeriod(
                    query['from_currency'],
                    query['conv_currency'],
                    query['start_date'],
                    query['end_date'],
                );
            else
                return res.status(400).send({
                    status: 400,
                    message:
                        'The date or period field is incorrect. ' +
                        "There must be fields 'date' or 'start_date' and 'end_date'. " +
                        'Read more in the documentation',
                });

            if (typeof rate_res !== 'object')
                return res.status(400).send({
                    status: 400,
                    message: rate_res,
                });
            else return res.status(200).send(rate_res);
        } catch (err) {
            fastify.log.error(err.message);
            res.status(500).send({
                status: 500,
                message: err.message,
            });
        }
    });
};