salix/print/templates/reports/letter-debtor/letter-debtor.js

const Component = require(`${appPath}/core/component`);
const db = require(`${appPath}/core/database`);
const reportHeader = new Component('report-header');
const reportFooter = new Component('report-footer');

module.exports = {
    name: 'letter-debtor',
    async serverPrefetch() {
        this.client = await this.fetchClient(this.clientId);
        this.sales = await this.fetchSales(this.clientId, this.companyId);

        if (!this.client)
            throw new Error('Something went wrong');
    },
    computed: {
        dated: function() {
            const filters = this.$options.filters;

            return filters.date(new Date(), '%d-%m-%Y');
        }
    },
    data() {
        return {totalBalance: 0.00};
    },
    methods: {
        fetchClient(clientId) {
            return db.findOne(
                `SELECT
                        c.id,
                        c.socialName,
                        c.street,
                        c.postcode,
                        c.city,
                        c.fi,
                        p.name AS province,
                        ct.country
                FROM client c
                    JOIN country ct ON ct.id = c.countryFk
                    LEFT JOIN province p ON p.id = c.provinceFk
                WHERE c.id = ?`, [clientId]);
        },
        fetchSales(clientId, companyId) {
            return db.find(
                `CALL vn.clientGetDebtDiary(:clientId, :companyId)`, {
                    clientId: clientId,
                    companyId: companyId,
                }).then(rows => {
                return rows[0];
            });
        },
        getBalance(sale) {
            if (sale.debtOut)
                this.totalBalance += parseFloat(sale.debtOut);

            if (sale.debtIn)
                this.totalBalance -= parseFloat(sale.debtIn);

            return parseFloat(this.totalBalance.toFixed(2));
        },
        getTotalDebtOut() {
            let debtOut = 0.00;
            this.sales.forEach(sale => {
                debtOut += sale.debtOut ? parseFloat(sale.debtOut) : 0;
            });

            return debtOut.toFixed(2);
        },
        getTotalDebtIn() {
            let debtIn = 0.00;
            this.sales.forEach(sale => {
                debtIn += sale.debtIn ? parseFloat(sale.debtIn) : 0;
            });

            return debtIn.toFixed(2);
        },
    },
    components: {
        'report-header': reportHeader.build(),
        'report-footer': reportFooter.build()
    },
    props: {
        clientId: {
            required: true
        },
        companyId: {
            required: true
        }
    }
};