feat(worker_calendar): add restriction to choose "Vacaciones 1/2 día"

loopback/locale/es.json

@@ -193,6 +193,7 @@
 	"Client assignment has changed": "He cambiado el comercial ~*\"<{{previousWorkerName}}>\"*~ por *\"<{{currentWorkerName}}>\"* del cliente [{{clientName}} ({{clientId}})]({{{url}}})",
 	"None": "Ninguno",
 	"The contract was not active during the selected date": "El contrato no estaba activo durante la fecha seleccionada",
+	"Cannot add more than one '1/2 day vacation'": "No puedes añadir más de un 'Vacaciones 1/2 dia'",
 	"This document already exists on this ticket": "Este documento ya existe en el ticket",
 	"Some of the selected tickets are not billable": "Algunos de los tickets seleccionados no son facturables",
 	"You can't invoice tickets from multiple clients": "No puedes facturar tickets de multiples clientes",

modules/worker/back/methods/worker/createAbsence.js

@@ -65,6 +65,14 @@ module.exports = Self => {
             if (args.dated < labour.started || (labour.ended != null && args.dated > labour.ended))
                 throw new UserError(`The contract was not active during the selected date`);
 
+            let result = await Self.rawSql(
+                `SELECT COUNT(*) halfDayHolidayCounter
+                    FROM vn.calendar c 
+                    WHERE c.dayOffTypeFk = 6 AND c.businessFk = ?`, [args.businessFk]);
+
+            if (args.absenceTypeId == 6 && result[0].halfDayHolidayCounter > 0)
+                throw new UserError(`Cannot add more than one '1/2 day vacation'`);
+
             const absence = await models.Calendar.create({
                 businessFk: labour.businessFk,
                 dayOffTypeFk: args.absenceTypeId,