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;

        if (query['date'])
            rate_res = await rate.getDay(
                query['from_currency'],
                query['conv_currency'],
                query['date'],
            );
        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
        )
    });
};