134 lines
3.2 KiB
C#
134 lines
3.2 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace Diplom_O.DataBase
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{
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public static class FuncDB
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{
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public static void ChkShtat(Shtat obj)
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{
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try
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{
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if (string.IsNullOrEmpty(obj.Doljnost)) throw new Exception("Пустая должность.");
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if (obj.Size <= 0) throw new Exception("Количество мест <= 0.");
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}
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catch { throw; }
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}
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public static Shtat GetShtat(int id)
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{
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try
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{
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using (var db = new MainDB())
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{
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var res = from a in db.Shtat
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where a.Id == id
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select a;
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try { return res.Single(); }
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catch { return null; }
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}
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}
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catch { throw; }
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}
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public static (Shtat shtat, int ost)[] ListShtat(string filter = null)
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{
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try
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{
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using (var db = new MainDB())
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{
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var f = (string.IsNullOrEmpty(filter)) ? "" : filter.ToLower();
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var shtat = (string.IsNullOrEmpty(f)) ?
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(from a in db.Shtat
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where a.Active
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select a).ToArray() :
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(from a in db.Shtat
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where a.Doljnost.ToLower().Contains(f) && a.Active
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select a).ToArray();
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var res = new List<(Shtat shtat, int ost)>();
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for(var i = 0; i < shtat.Length; i++)
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res.Add((shtat[i], shtat[i].Size - BusySizeShtat(shtat[i].Id)));
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return res.ToArray();
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}
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}
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catch { throw; }
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}
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public static void AddShtat(Shtat obj)
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{
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try
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{
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ChkShtat(obj);
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if (HaveDoljFromShtat(obj.Doljnost)) throw new Exception("Должность существует.");
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using (var db = new MainDB())
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{
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obj.Active = true;
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db.Shtat.Add(obj);
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db.SaveChanges();
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}
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}
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catch { throw; }
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}
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public static void ChangeShtat(Shtat obj)
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{
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try
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{
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ChkShtat(obj);
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if (GetShtat(obj.Id) == null) throw new Exception("Должность не существует.");
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if (GetShtat(obj.Id).Doljnost != obj.Doljnost && HaveDoljFromShtat(obj.Doljnost)) throw new Exception("Должность существует.");
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if (obj.Size < BusySizeShtat(obj.Id)) throw new Exception("Занятых мест больше > указанных.");
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using (var db = new MainDB())
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{
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db.Shtat.Update(obj);
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db.SaveChanges();
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}
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}
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catch { throw; }
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}
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public static void DelShtat(Shtat obj)
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{
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try
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{
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ChkShtat(obj);
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if (GetShtat(obj.Id) == null) throw new Exception("Должность не существует.");
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if (BusySizeShtat(obj.Id) > 0) throw new Exception("Есть занятые места.");
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obj.Active = false;
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using (var db = new MainDB())
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{
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db.Shtat.Update(obj);
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db.SaveChanges();
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}
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}
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catch { throw; }
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}
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public static int BusySizeShtat(int id)
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{
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try
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{
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using (var db = new MainDB())
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{
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var res = (from a in db.Rabotniky
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where a.ShtatId == id && !a.End.HasValue
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select a).ToArray();
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return res.Length;
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}
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}
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catch { throw; }
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}
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public static bool HaveDoljFromShtat(string dolj)
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{
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try
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{
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using (var db = new MainDB())
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{
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var chkDolj = from a in db.Shtat
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where a.Doljnost == dolj && a.Active
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select a;
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return chkDolj.Count() > 0;
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}
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}
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catch { throw; }
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}
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}
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}
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