Реализовал хранение писем в БД

SecuritySystem/SecuritySystemDatabaseImplement/Implements/MessageInfoStorage.cs

@@ -0,0 +1,50 @@
+using Microsoft.EntityFrameworkCore;
+using SecuritySystemContracts.BindingModels;
+using SecuritySystemContracts.SearchModels;
+using SecuritySystemContracts.StoragesContracts;
+using SecuritySystemContracts.ViewModels;
+using SecuritySystemDatabaseImplement.Models;
+
+namespace SecuritySystemDatabaseImplement.Implements
+{
+    public class MessageInfoStorage : IMessageInfoStorage
+    {
+        public MessageInfoViewModel? GetElement(MessageInfoSearchModel model)
+        {
+            return GetFilteredList(model).FirstOrDefault();
+        }
+
+        public List<MessageInfoViewModel> GetFilteredList(MessageInfoSearchModel model)
+        {
+            var messageInfos = GetFullList();
+            if (!string.IsNullOrEmpty(model.MessageId))
+            {
+                messageInfos = messageInfos.Where(x => x.MessageId == model.MessageId).ToList();
+            }
+            if (model.ClientId != null)
+            {
+                messageInfos = messageInfos.Where(x => x.ClientId == model.ClientId).ToList();
+            }
+            return messageInfos;
+        }
+
+        public List<MessageInfoViewModel> GetFullList()
+        {
+            using var context = new SecuritySystemDatabase();
+            return context.MessageInfos.Include(x => x.Client).Select(x => x.GetViewModel).ToList();
+        }
+
+        public MessageInfoViewModel? Insert(MessageInfoBindingModel model)
+        {
+            var messageInfo = MessageInfo.Create(model);
+            if (messageInfo == null)
+            {
+                return null;
+            }
+            using var context = new SecuritySystemDatabase();
+            context.MessageInfos.Add(messageInfo);
+            context.SaveChanges();
+            return messageInfo.GetViewModel;
+        }
+    }
+}

SecuritySystem/SecuritySystemDatabaseImplement/Models/MessageInfo.cs

@@ -0,0 +1,75 @@
+using SecuritySystemContracts.BindingModels;
+using SecuritySystemContracts.ViewModels;
+using SecuritySystemDataModels.Models;
+using System.ComponentModel.DataAnnotations;
+using System.MessageInfoModel.DataAnnotations.Schema;
+
+namespace SecuritySystemDatabaseImplement.Models
+{
+    public class MessageInfo : IMessageInfoModel
+    {
+        [Required]
+        public string MessageId { get; set; } = string.Empty;
+        public int? ClientId { get; set; }
+        public virtual Client? Client { get; set; }
+        [Required]
+        public string SenderName { get; set; } = string.Empty;
+        [Required]
+        public DateTime DateDelivery { get; set; } = DateTime.Now;
+        [Required]
+        public string Subject { get; set; } = string.Empty;
+        [Required]
+        public string Body { get; set; } = string.Empty;
+
+        public static MessageInfo? Create(MessageInfoBindingModel model)
+        {
+            if (model == null)
+            {
+                return null;
+            }
+            return new MessageInfo()
+            {
+                MessageId = model.MessageId,
+                ClientId = model.ClientId,
+                SenderName = model.SenderName,
+                DateDelivery = model.DateDelivery,
+                Subject = model.Subject,
+                Body = model.Body,
+            };
+        }
+        public static MessageInfo Create(MessageInfoViewModel model)
+        {
+            return new MessageInfo
+            {
+                MessageId = model.MessageId,
+                ClientId = model.ClientId,
+                SenderName = model.SenderName,
+                DateDelivery = model.DateDelivery,
+                Subject = model.Subject,
+                Body = model.Body,
+            };
+        }
+        public void Update(MessageInfoBindingModel model)
+        {
+            if (model == null)
+            {
+                return;
+            }
+            MessageId = model.MessageId;
+            ClientId = model.ClientId;
+            SenderName = model.SenderName;
+            DateDelivery = model.DateDelivery;
+            Subject = model.Subject;
+            Body = model.Body;
+        }
+        public MessageInfoViewModel GetViewModel => new()
+        {
+            MessageId = MessageId,
+            ClientId = ClientId,
+            SenderName = SenderName,
+            DateDelivery = DateDelivery,
+            Subject = Subject,
+            Body = Body,
+        };
+    }
+}

SecuritySystem/SecuritySystemDatabaseImplement/SecuritySystemDatabase.cs

@@ -21,6 +21,7 @@ namespace SecuritySystemDatabaseImplement
         public virtual DbSet<Order> Orders { set; get; }
         public virtual DbSet<Client> Clients { set; get; }
         public virtual DbSet<Implementer> Implementers { set; get; }
+        public virtual DbSet<MessageInfo> MessageInfos { set; get; }
     }
 
 }