salix/services/loopback/common/methods/ticket/getVAT.js

module.exports = Self => {
    Self.remoteMethod('getVAT', {
        description: 'Returns ticket total VAT',
        accessType: 'READ',
        accepts: [{
            arg: 'id',
            type: 'number',
            required: true,
            description: 'ticket id',
            http: {source: 'path'}
        }],
        returns: {
            type: 'number',
            root: true
        },
        http: {
            path: `/:id/getVAT`,
            verb: 'GET'
        }
    });

    Self.getVAT = async ticketFk => {
        let totalTax = 0.00;
        let taxes = await Self.app.models.Ticket.getTaxes(ticketFk);

        taxes.forEach(tax => {
            totalTax += tax.tax;
        });

        return Math.round(totalTax * 100) / 100;
    };
};