salix/modules/ticket/back/models/ticket-request.js

const LoopBackContext = require('loopback-context');
const dateUtil = require('vn-loopback/util/date');

module.exports = function(Self) {
    require('../methods/ticket-request/filter')(Self);
    require('../methods/ticket-request/deny')(Self);
    require('../methods/ticket-request/confirm')(Self);

    Self.observe('before save', async function(ctx) {
        if (ctx.isNewInstance) {
            const loopBackContext = LoopBackContext.getCurrentContext();
            const filter = {where: {userFk: loopBackContext.active.accessToken.userId}};
            const models = Self.app.models;
            const worker = await models.Worker.findOne(filter);

            const instance = ctx.instance;
            instance.requesterFk = worker.id;

            const httpCtx = {req: loopBackContext.active};
            const httpRequest = httpCtx.req.http .req;
            const $t = httpRequest.__;

            const attenderId = instance.attenderFk;
            if (attenderId) {
                const ticket = await models.Ticket.findById(instance.ticketFk);
                let messageText = 'New ticket request has been created';
                if (instance.price)
                    messageText = 'New ticket request has been created with price';

                const shipped = dateUtil.toString(ticket.shipped);
                const message = $t(messageText, {
                    description: instance.description,
                    shipped: shipped,
                    quantity: instance.quantity,
                    price: instance.price
                });
                await models.Chat.sendCheckingPresence(httpCtx, attenderId, message);
            }
        }
    });
};