salix/print/templates/email/backup-printer-selected/backup-printer-selected.js

const Component = require(`vn-print/core/component`);
const emailBody = new Component('email-body');
const name = 'backup-printer-selected';

module.exports = {
    name: name,
    async serverPrefetch() {
        const notifications = await this.rawSqlFromDef('previousNotifications', [name]);
        if (!notifications.length || checkDuplicates(notifications, this.labelerId, this.sectorId))
            throw new Error('Previous notification sended with the same parameters');

        this.sector = await this.findOneFromDef('sector', [this.sectorId]);
        if (!this.sector)
            throw new Error('Something went wrong');

        this.labeler = await this.findOneFromDef('printer', [this.labelerId]);
        this.mainPrinter = await this.findOneFromDef('printer', [this.sector.backupPrinterFk]);
        this.worker = await this.findOneFromDef('worker', [this.workerId]);
    },
    components: {
        'email-body': emailBody.build(),
    },
    props: {
        labelerId: {
            type: Number,
            required: true
        },
        sectorId: {
            type: Number,
            required: true
        },
        workerId: {
            type: Number,
            required: true
        }
    }
};

function checkDuplicates(notifications, labelerFk, printerFk) {
    const criteria = {
        labelerId: labelerFk,
        sectorId: printerFk
    };
    const filteredNotifications = notifications.filter(notification => {
        const paramsObj = JSON.parse(notification.params);
        return Object.keys(criteria).every(key => criteria[key] === paramsObj[key]);
    });
    return filteredNotifications.length > 1;
}