restapi/20230415.3/w230415/Hall.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace w230415_classes
{
    public class Hall
    {
        public string Name { get; set; }

        protected List<HallPlace> HallPlaceList { get; set; } = new List<HallPlace>();


        /// <summary>
        /// Read [R]
        /// </summary>
        /// <returns></returns>
        public List<HallPlace> GetNotBookedPlaceList()
        {
            List<HallPlace> hpl = new List<HallPlace>();
            foreach (var item in HallPlaceList)
            {
                if (item.FlagBooked) continue;
                hpl.Add(item);
            }
            return hpl;
        }

        /// <summary>
        /// Read [R]
        /// </summary>
        /// <param name="iRow"></param>
        /// <param name="iPosition"></param>
        /// <returns></returns>
        public HallPlace? ReadPlace(int iRow, int iPosition)
        {
            var el = HallPlaceList.FirstOrDefault(hp => hp.SeatPosition == iPosition && hp.SeatRow == iRow);
            return el;
        }



        /// <summary>
        /// Update [U]
        /// </summary>
        /// <param name="iRow"></param>
        /// <param name="iPosition"></param>
        /// <returns></returns>
        public bool BookPlace(int iRow, int iPosition)
        {
            var el = HallPlaceList.FirstOrDefault(hp => hp.SeatPosition == iPosition && hp.SeatRow == iRow);
            if (el == null)
            {
                return false;
            }
            if (el.FlagBooked)
            {
                return false;
            }
            el.FlagBooked = true;
            return true;
        }

        /// <summary>
        /// Create [C]
        /// </summary>
        /// <param name="iRow"></param>
        /// <param name="iPosition"></param>
        /// <returns></returns>
        public bool AddPlace(int iRow, int iPosition)
        {
            var el = HallPlaceList.FirstOrDefault(hp => hp.SeatPosition == iPosition && hp.SeatRow == iRow);
            if (el != null)
            {
                return false;
            }
            HallPlaceList.Add(new HallPlace()
            {
                SeatPosition = iPosition,
                SeatRow = iRow,
            });
            return true;
        }

        /// <summary>
        /// Delete [D]
        /// </summary>
        /// <param name="iRow"></param>
        /// <param name="iPosition"></param>
        /// <returns></returns>
        public bool DeletePlace(int iRow, int iPosition)
        {
            var el = HallPlaceList.FirstOrDefault(hp => hp.SeatPosition == iPosition && hp.SeatRow == iRow);
            if (el == null)
            {
                return false;
            }
            return HallPlaceList.Remove(el);
        }

    }
}