salix/services/ticket/common/methods/ticket-tracking/changeState.js

const UserError = require('vn-loopback/common/helpers').UserError;

module.exports = Self => {
    Self.remoteMethodCtx('changeState', {
        description: 'Change the state of a ticket',
        accessType: 'WRITE',
        accepts: [{
            arg: 'params',
            type: 'object',
            required: true,
            description: 'ticketFk, stateFk',
            http: {source: 'body'}
        }],
        returns: {
            type: 'string',
            root: true
        },
        http: {
            path: `/changeState`,
            verb: 'post'
        }
    });

    Self.changeState = async(ctx, params) => {
        let models = Self.app.models;
        let isProduction;
        let isEditable = await Self.app.models.Ticket.isEditable(params.ticketFk);

        if (ctx.req.accessToken) {
            let token = ctx.req.accessToken;
            let currentUserId = token && token.userId;
            isProduction = await models.Account.hasRole(currentUserId, 'Production');
            let worker = await models.Worker.findOne({where: {userFk: currentUserId}});
            params.workerFk = worker.id;
        }

        if (!isEditable && !isProduction)
            throw new UserError(`You don't have enough privileges to change the state of this ticket`);

        return await Self.app.models.TicketTracking.create(params);
    };
};