Исполнитель: сделал бизнес логику, начал делать DataBaseImplement

Hotel/Hotel.sln

@@ -5,11 +5,13 @@ VisualStudioVersion = 17.9.34622.214
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "HotelView", "HotelView\HotelView.csproj", "{5A101CB8-E719-4690-BC6C-83476A65A950}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "HotelDataModels", "HotelDataModels\HotelDataModels.csproj", "{F7796750-0D31-4A5A-8551-897D939C2198}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "HotelDataModels", "HotelDataModels\HotelDataModels.csproj", "{F7796750-0D31-4A5A-8551-897D939C2198}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "HotelContracts", "HotelContracts\HotelContracts.csproj", "{2245C449-6B2E-47AA-AB95-BEE11D387FCD}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "HotelContracts", "HotelContracts\HotelContracts.csproj", "{2245C449-6B2E-47AA-AB95-BEE11D387FCD}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "HotelBusinessLogic", "HotelBusinessLogic\HotelBusinessLogic.csproj", "{B1B6D8C2-CCB1-47AB-A3B6-14BE5BE6E3E7}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "HotelBusinessLogic", "HotelBusinessLogic\HotelBusinessLogic.csproj", "{B1B6D8C2-CCB1-47AB-A3B6-14BE5BE6E3E7}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "HotelDataBaseImplement", "HotelDataBaseImplement\HotelDataBaseImplement.csproj", "{7D0D63D3-754C-45C4-8B71-882AFD86AAB6}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -33,6 +35,10 @@ Global
 		{B1B6D8C2-CCB1-47AB-A3B6-14BE5BE6E3E7}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{B1B6D8C2-CCB1-47AB-A3B6-14BE5BE6E3E7}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{B1B6D8C2-CCB1-47AB-A3B6-14BE5BE6E3E7}.Release|Any CPU.Build.0 = Release|Any CPU
+		{7D0D63D3-754C-45C4-8B71-882AFD86AAB6}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{7D0D63D3-754C-45C4-8B71-882AFD86AAB6}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{7D0D63D3-754C-45C4-8B71-882AFD86AAB6}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{7D0D63D3-754C-45C4-8B71-882AFD86AAB6}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

Hotel/HotelBusinessLogic/BusinessLogic/ConferenceLogic.cs

@@ -10,6 +10,7 @@ using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
+using System.Xml.Linq;
 
 namespace HotelBusinessLogic.BusinessLogic
 {
@@ -18,13 +19,132 @@ namespace HotelBusinessLogic.BusinessLogic
 		private readonly ILogger _logger;
 		private readonly IConferenceStorage _conferenceStorage;
 
+		public ConferenceLogic(ILogger<ConferenceLogic> logger, IConferenceStorage conferenceStorage)
+		{
+			_logger = logger;
+			_conferenceStorage = conferenceStorage;
+		}
 
-		//List<ConferenceViewModel>? ReadList(ConferenceSearchModel? model);
+		public List<ConferenceViewModel>? ReadList(ConferenceSearchModel? model)
-		//ConferenceViewModel? ReadElement(ConferenceSearchModel? model);
+		{
+			_logger.LogInformation("ReadList. ConferenceName:{ConferenceName}.Id:{ Id}", model?.ConferenceName, model?.Id);
 
-		//bool AddParticipantToConference(ConferenceSearchModel model, IParticipantModel participant);
+			var list = model == null ? _conferenceStorage.GetFullList() : _conferenceStorage.GetFilteredList(model);
-		//bool Create(ConferenceBindingModel model);
+
-		//bool Update(ConferenceBindingModel model);
+			if (list == null)
-		//bool Delete(ConferenceBindingModel model);
+			{
+				_logger.LogWarning("ReadList return null list");
+				return null;
+			}
+
+			_logger.LogInformation("ReadList. Count:{Count}", list.Count);
+			return list;
+		}
+
+		public ConferenceViewModel? ReadElement(ConferenceSearchModel? model)
+		{
+			if (model == null)
+				throw new ArgumentNullException(nameof(model));
+
+			_logger.LogInformation("ReadElement. ConferenceName:{ConferenceName}.Id:{ Id}", model?.ConferenceName, model?.Id);
+
+			var element = _conferenceStorage.GetElement(model);
+
+			if (element == null)
+			{
+				_logger.LogWarning("ReadElement element not found");
+				return null;
+			}
+
+			_logger.LogInformation("ReadElement fing. Id:{id}", element.Id);
+
+			return element;
+		}
+
+		public bool Create(ConferenceBindingModel model)
+		{
+			CheckModel(model);
+			model.ConferenceParticipants = new();
+
+			if (_conferenceStorage.Insert(model) == null)
+			{
+				_logger.LogWarning("Insert error");
+				return false;
+			}
+
+			return true;
+		}
+
+		public bool Update(ConferenceBindingModel model)
+		{
+			CheckModel(model);
+			if (_conferenceStorage.Update(model) == null)
+			{
+				_logger.LogWarning("Update error");
+				return false;
+			}
+
+			return true;
+		}
+
+		public bool Delete(ConferenceBindingModel model)
+		{
+			CheckModel(model, false);
+			_logger.LogInformation("Delete. Id:{Id}", model.Id);
+
+			if (_conferenceStorage.Delete(model) == null)
+			{
+				_logger.LogWarning("Delete error");
+				return false;
+			}
+
+			return true;
+		}
+
+		public bool AddParticipantToConference(ConferenceSearchModel model, IParticipantModel participant)
+		{
+			if (model == null)
+			{
+				throw new ArgumentNullException(nameof(model));
+			}
+
+			_logger.LogInformation("AddParticipantToConference. ConferenceName:{ConferenceName}.Id:{ Id}", model.ConferenceName, model.Id);
+			var element = _conferenceStorage.GetElement(model);
+
+			if(element == null)
+			{
+				_logger.LogWarning("AddParticipantToConference element not found");
+				return false;
+			}
+
+			_logger.LogInformation("AddParticipantToConference find. Id:{Id}", element.Id);
+
+			element.ConferenceParticipants[participant.Id] = participant;
+
+			_conferenceStorage.Update(new()
+			{
+				Id = element.Id,
+				ConferenceName = element.ConferenceName,
+				Subject = element.Subject,
+				OrganiserId = element.OrganiserId,
+				ConferenceParticipants = element.ConferenceParticipants,
+			});
+
+			return true;
+		}
+
+		public void CheckModel(ConferenceBindingModel model, bool withParams = true)
+		{
+			if (model == null)
+				throw new ArgumentNullException(nameof(model));
+
+			if (!withParams)
+				return;
+
+			if (string.IsNullOrEmpty(model.ConferenceName)) 
+				throw new ArgumentException("Нет названия конференции", nameof(model.ConferenceName));
+
+			_logger.LogInformation("Conference. ConferenceName:{ConferenceName}. Id: { Id}", model.ConferenceName, model.Id);
+		}
 	}
 }

Hotel/HotelBusinessLogic/BusinessLogic/MealPlanLogic.cs

@@ -0,0 +1,170 @@
+using HotelContracts.BindingModels;
+using HotelContracts.BusinessLogicsContracts;
+using HotelContracts.SearchModels;
+using HotelContracts.StoragesContracts;
+using HotelContracts.ViewModels;
+using HotelDataModels.Models;
+using Microsoft.Extensions.Logging;
+
+namespace HotelBusinessLogic.BusinessLogic
+{
+	public class MealPlanLogic : IMealPlanLogic
+	{
+		private readonly ILogger _logger;
+		private readonly IMealPlanStorage _mealPlanStorage;
+
+		public MealPlanLogic (ILogger<MealPlanLogic> logger, IMealPlanStorage mealPlanStorage)
+		{
+			_logger = logger;
+			_mealPlanStorage = mealPlanStorage;
+		}
+
+		public List<MealPlanViewModel>? ReadList(MealPlanSearchModel? model)
+		{
+			_logger.LogInformation("ReadList. MealPlanName:{MealPlanName}.Id:{ Id}", model?.MealPlanName, model?.Id);
+
+			var list = model == null ? _mealPlanStorage.GetFullList() : _mealPlanStorage.GetFilteredList(model);
+
+			if (list == null)
+			{
+				_logger.LogWarning("ReadList return null list");
+				return null;
+			}
+
+			_logger.LogInformation("ReadList. Count:{Count}", list.Count);
+			return list;
+		}
+
+		public MealPlanViewModel? ReadElement(MealPlanSearchModel? model)
+		{
+			if (model == null)
+			{
+				throw new ArgumentNullException(nameof(model));
+			}
+
+			_logger.LogInformation("ReadList. MealPlanName:{MealPlanName}.Id:{ Id}", model?.MealPlanName, model?.Id);
+
+			var element = _mealPlanStorage.GetElement(model);
+
+			if (element == null)
+			{
+				_logger.LogInformation("ReadElement element not found");
+				return null;
+			}
+
+			_logger.LogInformation("ReadElement find: Id:{Id}", model.Id);
+
+			return element;
+		}
+
+		public bool Create(MealPlanBindingModel model)
+		{
+			CheckModel(model);
+			model.MealPlanParticipants = new();
+
+			if (_mealPlanStorage.Insert == null)
+			{
+				_logger.LogWarning("Insert error");
+				return false;
+			}
+
+			return true;
+		}
+
+		public bool Update(MealPlanBindingModel model)
+		{
+			CheckModel(model);
+
+			if (_mealPlanStorage.Update == null)
+			{
+				_logger.LogWarning("Update error");
+				return false;
+			}
+
+			return true;
+		}
+
+		public bool Delete(MealPlanBindingModel model)
+		{
+			CheckModel(model, false);
+
+			_logger.LogInformation("Delete. Id:{Id}", model.Id);
+
+			if (_mealPlanStorage.Delete == null)
+			{
+				_logger.LogWarning("Delete error");
+				return false;
+			}
+
+			return true;
+		}
+
+		public bool AddMemberToMealPlan(MealPlanSearchModel model, IParticipantModel participant)
+		{
+			if (model == null)
+			{
+				throw new ArgumentNullException(nameof(model));
+			}
+
+			_logger.LogInformation("AddMemberToMealPlan. MealPlanName:{MealPlanName}.Id:{ Id}", model.MealPlanName, model.Id);
+
+			var element = _mealPlanStorage.GetElement(model);
+
+			if (element == null)
+			{
+				_logger.LogWarning("AddMemberToMealPlan element not found");
+				return false;
+			}
+
+			_logger.LogInformation("AddMemberToMealPlan find. Id:{Id}", element.Id);
+
+			element.MealPlanParticipants[participant.Id] = participant;
+
+			_mealPlanStorage.Update(new()
+			{
+				Id = element.Id,
+				MealPlanName = element.MealPlanName,
+				MealPlanPrice = element.MealPlanPrice,
+				OrganiserId = element.OrganiserId,
+				MealPlanParticipants = element.MealPlanParticipants
+			});
+
+			return true;
+		}
+
+		public void CheckModel(MealPlanBindingModel model, bool withParams = true) 
+		{ 
+			if (model == null)
+			{
+				throw new ArgumentNullException(nameof(model));
+			}
+
+			if (!withParams)
+			{
+				return;
+			}
+
+			if (string.IsNullOrEmpty(model.MealPlanName))
+			{
+				throw new ArgumentNullException("Нет названия плана питания", nameof(model.MealPlanName));
+			}
+
+			if (model.MealPlanPrice < 0)
+			{
+				throw new ArgumentNullException("Стоимость плана питания не может быть меньше 0", nameof(model.MealPlanPrice));
+			}
+
+			_logger.LogInformation("MealPlan. MealPlanName:{MealPlanName}.MealPlanPrice:{ MealPlanPrice}. Id: { Id}", model.MealPlanName, model.MealPlanPrice, model.Id);
+
+			var element = _mealPlanStorage.GetElement(new MealPlanSearchModel
+			{
+				MealPlanName = model.MealPlanName,
+			});
+
+			if (element != null && element.Id != model.Id)
+			{
+				throw new InvalidOperationException("План питания с таким названием уже есть");
+			}
+		}
+	}
+}

Hotel/HotelBusinessLogic/BusinessLogic/OrganiserLogic.cs

@@ -0,0 +1,140 @@
+using HotelContracts.BindingModels;
+using HotelContracts.BusinessLogicsContracts;
+using HotelContracts.SearchModels;
+using HotelContracts.StoragesContracts;
+using HotelContracts.ViewModels;
+using Microsoft.Extensions.Logging;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace HotelBusinessLogic.BusinessLogic
+{
+	public class OrganiserLogic : IOrganiserLogic
+	{
+		private readonly ILogger _logger;
+		private readonly IOrganiserStorage _organiserStorage;
+
+		public OrganiserLogic(ILogger<OrganiserLogic> logger, IOrganiserStorage organiserStorage)
+		{
+			_logger = logger;
+			_organiserStorage = organiserStorage;
+		}
+
+		public List<OrganiserViewModel>? ReadList(OrganiserSearchModel? model)
+		{
+			_logger.LogInformation("ReadList. OrganiserFIO: {OrganiserFIO}. OrganiserLogin: {OrganiserLogin}. Id: {Id}.", model?.OrganiserFIO, model?.OrganiserLogin, model?.Id);
+
+			var list = model == null ? _organiserStorage.GetFullList() : _organiserStorage.GetFilteredList(model);
+
+			if (list == null)
+			{
+				_logger.LogInformation("ReadList return null list");
+				return null;
+			}
+
+			_logger.LogInformation("ReadList. Count: {Count}", list.Count);
+			return list;
+		}
+
+		public OrganiserViewModel? ReadElement(OrganiserSearchModel model)
+		{
+			if (model == null)
+			{
+				throw new ArgumentNullException(nameof(model));
+			}
+
+			_logger.LogInformation("ReadElement. OrganiserFIO: {OrganiserFIO}. OrganiserLogin: {OrganiserLogin}. Id: {Id}.", model.OrganiserFIO, model.OrganiserLogin, model.Id);
+
+			var element = _organiserStorage.GetElement(model);
+
+			if (element == null)
+			{
+				_logger.LogInformation("ReadElement element not found");
+				return null;
+			}
+
+			_logger.LogInformation("ReadElement find. Id: {Id}", element.Id);
+			return element;
+		}
+
+		public bool Create(OrganiserBindingModel model)
+		{
+			CheckModel(model);
+
+			if (_organiserStorage.Insert(model) == null)
+			{
+				_logger.LogInformation("Insert error");
+				return false;
+			}
+
+			return true;
+		}
+
+		public bool Update(OrganiserBindingModel model)
+		{
+			CheckModel(model);
+
+			if (_organiserStorage.Update(model) == null)
+			{
+				_logger.LogInformation("Update error");
+				return false;
+			}
+
+			return true;
+		}
+
+		public bool Delete(OrganiserBindingModel model)
+		{
+			CheckModel(model, false);
+
+			_logger.LogInformation("Delete. Id: {Id}", model.Id);
+
+			if (_organiserStorage.Delete(model) == null)
+			{
+				_logger.LogInformation("Delete error");
+				return false;
+			}
+
+			return true;
+		}
+
+		public void CheckModel(OrganiserBindingModel model, bool withParams = true)
+		{
+			if (model == null)
+				throw new ArgumentNullException(nameof(model));
+
+			if (!withParams)
+				return;
+
+			if (string.IsNullOrEmpty(model.OrganiserLogin))
+				throw new ArgumentException("Нет логина организатора", nameof(model.OrganiserLogin));
+
+			if (string.IsNullOrEmpty(model.OrganiserPassword))
+				throw new ArgumentException("Нет пароля организатора", nameof(model.OrganiserLogin));
+
+			if (string.IsNullOrEmpty(model.OrganiserEmail))
+				throw new ArgumentException("Нет эл. почты организатора", nameof(model.OrganiserEmail));
+
+			if (string.IsNullOrEmpty(model.OrganiserNumber))
+				throw new ArgumentException("Нет номера организатора", nameof(model.OrganiserNumber));
+
+			if (string.IsNullOrEmpty(model.OrganiserFIO))
+				throw new ArgumentException("Нет ФИО организатора", nameof(model.OrganiserFIO));
+
+			_logger.LogInformation("Organiser. OrganiserFIO: {OrganiserFIO}. OrganiserLogin: {OrganiserLogin}. Id: {Id}", model.OrganiserFIO, model.OrganiserLogin, model.Id);
+
+			var element = _organiserStorage.GetElement(new()
+			{
+				OrganiserEmail = model.OrganiserEmail,
+			});
+
+			if (element != null && element.Id == model.Id)
+			{
+				throw new InvalidOperationException("Организатор с таким логином уже есть");
+			}
+		}
+	}
+}

Hotel/HotelBusinessLogic/BusinessLogic/ParticipantLogic.cs

@@ -0,0 +1,121 @@
+using HotelContracts.BindingModels;
+using HotelContracts.BusinessLogicsContracts;
+using HotelContracts.SearchModels;
+using HotelContracts.StoragesContracts;
+using HotelContracts.ViewModels;
+using Microsoft.Extensions.Logging;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace HotelBusinessLogic.BusinessLogic
+{
+	public class ParticipantLogic : IParticipantLogic
+	{
+		private readonly ILogger _logger;
+		private readonly IParticipantStorage _participantStorage;
+
+		public ParticipantLogic(ILogger<ParticipantLogic> logger, IParticipantStorage participantStorage)
+		{
+			_logger = logger;
+			_participantStorage = participantStorage;
+		}
+
+		public List<ParticipantViewModel>? ReadList(ParticipantSearchModel? model)
+		{
+			_logger.LogInformation("ReadList. FIO:{FIO}.Id:{Id}", model?.FIO, model?.Id);
+
+			var list = model == null ? _participantStorage.GetFullList() : _participantStorage.GetFilteredList(model);
+
+			if (list == null)
+			{
+				_logger.LogInformation("ReadList return null list");
+				return null;
+			}
+
+			_logger.LogInformation("ReadList. Count:{Count}", list.Count);
+
+			return list;
+		}
+
+		public ParticipantViewModel? ReadElement(ParticipantSearchModel? model)
+		{
+			if (model == null)
+			{
+				throw new ArgumentNullException(nameof(model));
+			}
+
+			_logger.LogInformation("ReadElement.FIO:{FIO}.Id:{Id}", model.FIO, model.Id);
+
+			var element = _participantStorage.GetElement(model);
+
+			if (element == null)
+			{
+				_logger.LogInformation("ReadElement element not found");
+				return null;
+			}
+
+			_logger.LogInformation("ReadElement find. Id:{Id}", element.Id);
+
+			return element;
+		}
+
+		public bool Create(ParticipantBindingModel model)
+		{
+			CheckModel(model);
+
+			var result = _participantStorage.Insert(model);
+
+			if (result == null)
+			{
+				_logger.LogWarning("Insert error");
+				return false;
+			}
+
+			return true;
+		}
+
+		public bool Update(ParticipantBindingModel model)
+		{
+			CheckModel(model);
+
+			if (_participantStorage.Update(model) == null)
+			{
+				_logger.LogWarning("Update error");
+				return false;
+			}
+
+			return true;
+		}
+
+		public bool Delete(ParticipantBindingModel model)
+		{
+			CheckModel(model, false);
+
+			if (_participantStorage.Delete(model) == null)
+			{
+				_logger.LogWarning("Delete error");
+				return false;
+			}
+
+			return true;
+		}
+
+		public void CheckModel (ParticipantBindingModel model, bool withParams = true)
+		{
+			if (model == null) 
+				throw new ArgumentNullException(nameof(model));
+			if (!withParams)
+				return;
+
+			if (string.IsNullOrEmpty(model.FIO))
+				throw new ArgumentNullException("Нет ФИО участника", nameof(model.FIO));
+			if (string.IsNullOrEmpty (model.Number))
+				throw new ArgumentNullException("Нет номера участника", nameof(model.Number));
+
+			_logger.LogInformation("Participant. FIO:{FIO}.Number:{Number}. Id:{Id}", model.FIO, model.Number, model.Id);
+		}
+	}
+}

Hotel/HotelContracts/BindingModels/MealPlanBindingModel.cs

@@ -11,7 +11,7 @@ namespace HotelContracts.BindingModels
 	{
 		public int Id { get; set; }
 
-		public string MealPlantName { get; set; } = string.Empty;
+		public string MealPlanName { get; set; } = string.Empty;
 
 		public double MealPlanPrice { get; set; }
 

Hotel/HotelContracts/BusinessLogicsContracts/IConferenceLogic.cs

@@ -10,6 +10,7 @@ namespace HotelContracts.BusinessLogicsContracts
 		List<ConferenceViewModel>? ReadList(ConferenceSearchModel? model);
 		ConferenceViewModel? ReadElement(ConferenceSearchModel? model);
 
+		bool AddParticipantToConference(ConferenceSearchModel model, IParticipantModel participant);
 		bool Create(ConferenceBindingModel model);
 		bool Update(ConferenceBindingModel model);
 		bool Delete(ConferenceBindingModel model);

Hotel/HotelContracts/BusinessLogicsContracts/IMealPlanLogic.cs

@@ -2,11 +2,6 @@
 using HotelContracts.SearchModels;
 using HotelContracts.ViewModels;
 using HotelDataModels.Models;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 
 namespace HotelContracts.BusinessLogicsContracts
 {
@@ -18,5 +13,6 @@ namespace HotelContracts.BusinessLogicsContracts
 		bool Create(MealPlanBindingModel model);
 		bool Update(MealPlanBindingModel model);
 		bool Delete(MealPlanBindingModel model);
+		bool AddMemberToMealPlan(MealPlanSearchModel model, IParticipantModel participant);
 	}
 }

Hotel/HotelContracts/SearchModels/MealPlanSearchModel.cs

@@ -10,7 +10,7 @@ namespace HotelContracts.SearchModels
 	{
 		public int? Id { get; set; }
 
-		public string? MealPlantName { get; set; } 
+		public string? MealPlanName { get; set; } 
 
 		public int? OrganiserId { get; set; }
 	}

Hotel/HotelContracts/StoragesContracts/IConferenceStorage.cs

@@ -16,6 +16,6 @@ namespace HotelContracts.StoragesContracts
 
 		ConferenceViewModel? Update(ConferenceBindingModel model);
 
-		ConferenceViewModel? Create(ConferenceBindingModel model);
+		ConferenceViewModel? Delete(ConferenceBindingModel model);
 	}
 }

Hotel/HotelContracts/StoragesContracts/IMealPlanStorage.cs

@@ -21,6 +21,6 @@ namespace HotelContracts.StoragesContracts
 
 		MealPlanViewModel? Update(MealPlanBindingModel model);
 
-		MealPlanViewModel? Create(MealPlanBindingModel model);
+		MealPlanViewModel? Delete(MealPlanBindingModel model);
 	}
 }

Hotel/HotelContracts/StoragesContracts/IParticipantStorage.cs

@@ -9,7 +9,7 @@ using System.Threading.Tasks;
 
 namespace HotelContracts.StoragesContracts
 {
-	public interface ParticipantStorage
+	public interface IParticipantStorage
 	{
 		List<ParticipantViewModel> GetFullList();
 
@@ -21,6 +21,6 @@ namespace HotelContracts.StoragesContracts
 
 		ParticipantViewModel? Update(ParticipantBindingModel model);
 
-		ParticipantViewModel? Create(ParticipantBindingModel model);
+		ParticipantViewModel? Delete(ParticipantBindingModel model);
 	}
 }

Hotel/HotelContracts/ViewModels/MealPlanViewModel.cs

@@ -13,7 +13,7 @@ namespace HotelContracts.ViewModels
 		public int Id { get; set; }
 
 		[DisplayName("Название плана питания")]
-		public string MealPlantName { get; set; } = string.Empty;
+		public string MealPlanName { get; set; } = string.Empty;
 
 		[DisplayName("Цена плана питания")]
 		public double MealPlanPrice { get; set; }

Hotel/HotelDataBaseImplement/HotelDataBase.cs

@@ -0,0 +1,24 @@
+using HotelDataBaseImplement.Models;
+using Microsoft.EntityFrameworkCore;
+
+namespace HotelDataBaseImplement
+{
+	public class HotelDataBase : DbContext
+	{
+		protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
+		{
+			if (optionsBuilder.IsConfigured == false)
+			{
+				optionsBuilder.UseNpgsql(@"Host=localhost;Port=5432;Database=Hotel_bd;Username=postgres;Password=admin");
+			}
+			base.OnConfiguring(optionsBuilder);
+			AppContext.SetSwitch("Npgsql.EnableLegacyTimestampBehavior", true);
+			AppContext.SetSwitch("Npgsql.DisableDateTimeInfinityConversions", true);
+		}
+
+		public virtual DbSet<Conference> Conferences { get; set; }
+		public virtual DbSet<MealPlan> MealPlans { set; get; }
+		public virtual DbSet<Participant> Participant { set; get; }
+		public virtual DbSet<Organiser> Organisers { set; get; }
+	}
+}

Hotel/HotelDataBaseImplement/HotelDataBaseImplement.csproj

@@ -0,0 +1,24 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="7.0.11" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="7.0.11" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="7.0.11">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
+    <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="7.0.11" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\HotelContracts\HotelContracts.csproj" />
+    <ProjectReference Include="..\HotelDataModels\HotelDataModels.csproj" />
+  </ItemGroup>
+
+</Project>

Hotel/HotelDataBaseImplement/Models/Conference.cs

@@ -0,0 +1,34 @@
+using HotelDataModels.Models;
+using Microsoft.EntityFrameworkCore;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace HotelDataBaseImplement.Models
+{
+	public class Conference : IConferenceModel
+	{
+		public int Id { get; private set; }
+
+		[Required]
+		public string ConferenceName { get; set; } = string.Empty;
+
+		[Required]
+		public string Subject { get; set; } = string.Empty;
+
+		public int OrganiserId { get; private set; }
+
+		private Dictionary<int, IParticipantModel> _conferenceMembers = null;
+
+		public Dictionary<int, IParticipantModel> ConferenceParticipants
+		{
+			get
+			{
+				return _conferenceMembers;
+			}
+		}
+	}
+}

Hotel/HotelDataBaseImplement/Models/ConferenceParticipant.cs

@@ -0,0 +1,6 @@
+namespace HotelDataBaseImplement.Models
+{
+	public class ConferenceParticipant
+	{
+	}
+}

Hotel/HotelDataBaseImplement/Models/MealPlan.cs

@@ -0,0 +1,8 @@
+using HotelDataModels.Models;
+
+namespace HotelDataBaseImplement.Models
+{
+	public class MealPlan : IMealPlanModel
+	{
+	}
+}

Hotel/HotelDataBaseImplement/Models/MealPlanParticipant.cs

@@ -0,0 +1,6 @@
+namespace HotelDataBaseImplement.Models
+{
+	public class MealPlanParticipant
+	{
+	}
+}

Hotel/HotelDataBaseImplement/Models/Organiser.cs

@@ -0,0 +1,86 @@
+using HotelContracts.BindingModels;
+using HotelContracts.ViewModels;
+using HotelDataModels.Models;
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace HotelDataBaseImplement.Models
+{
+	public class Organiser : IOrganiserModel
+	{
+		public int Id { get; private set; }
+
+		[Required]
+		public string OrganiserLogin { get; set; } = string.Empty;
+
+		[Required]
+		public string OrganiserPassword { get; set; } = string.Empty;
+
+		[Required]
+		public string OrganiserEmail { get; set; } = string.Empty;
+
+		[Required]
+		public string OrganiserNumber { get; set; } = string.Empty;
+
+		[Required]
+		public string OrganiserFIO { get; set; } = string.Empty;
+
+		[ForeignKey("OrganiserId")]
+		public virtual List<Conference> Conferences { get; set; } = new();
+
+		[ForeignKey("OrganiserId")]
+		public virtual List<MealPlan> MealPlans { get; set; } = new();
+
+		[ForeignKey("OrganiserId")]
+		public virtual List<Participant> Participants { get; set; } = new();
+
+		public static Organiser? Create(OrganiserBindingModel model)
+		{
+			if (model == null)
+				return null;
+
+			return new Organiser()
+			{
+				Id = model.Id,
+				OrganiserLogin = model.OrganiserLogin,
+				OrganiserPassword = model.OrganiserPassword,
+				OrganiserEmail = model.OrganiserEmail,
+				OrganiserNumber = model.OrganiserNumber,
+				OrganiserFIO = model.OrganiserFIO,
+			};
+		}
+
+		public static Organiser Create(OrganiserViewModel model)
+		{
+			return new Organiser
+			{
+				Id = model.Id,
+				OrganiserLogin = model.OrganiserLogin,
+				OrganiserPassword = model.OrganiserPassword,
+				OrganiserEmail = model.OrganiserEmail,
+				OrganiserNumber = model.OrganiserNumber,
+				OrganiserFIO = model.OrganiserFIO,
+			};
+		}
+
+		public void Update(OrganiserBindingModel model)
+		{
+			if (model == null) return;
+			OrganiserLogin = model.OrganiserLogin;
+			OrganiserPassword = model.OrganiserPassword;
+			OrganiserEmail = model.OrganiserEmail;
+			OrganiserNumber = model.OrganiserNumber;
+			OrganiserFIO = model.OrganiserFIO;
+		}
+
+		public OrganiserViewModel GetViewModel => new()
+		{
+			Id = Id,
+			OrganiserLogin = OrganiserLogin,
+			OrganiserPassword = OrganiserPassword,
+			OrganiserEmail = OrganiserEmail,
+			OrganiserNumber = OrganiserNumber,
+			OrganiserFIO = OrganiserFIO,
+		};
+	}
+}

Hotel/HotelDataBaseImplement/Models/Participant.cs

@@ -0,0 +1,57 @@
+using HotelContracts.BindingModels;
+using HotelContracts.ViewModels;
+using HotelDataModels.Models;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace HotelDataBaseImplement.Models
+{
+	public class Participant : IParticipantModel
+	{
+		public int Id { get; private set; }
+
+		[Required]
+		public string FIO { get; set; } = string.Empty;
+
+		[Required]
+		public string Number { get; set; } = string.Empty;
+
+		public int OrganiserId { get; private set; }
+
+		public virtual Organiser Organiser { get; set; }
+
+		[ForeignKey("ParticipantId")]
+		public virtual List<MealPlanParticipant> MealPlanParticipants { get; set; } = new();
+
+		[ForeignKey("ParticipantId")]
+		public virtual List<ConferenceParticipant> ConferenceParticipant { get; set; } = new();
+
+		public static Participant? Create(ParticipantBindingModel model)
+		{
+			if (model  == null) return null;
+			return new Participant()
+			{
+				Id = model.Id,
+				FIO = model.FIO,
+				Number = model.Number,
+				OrganiserId = model.OrganiserId,
+			};
+		}
+
+		public static Participant Create(ParticipantViewModel model)
+		{
+			return new Participant
+			{
+				Id = model.Id,
+				FIO = model.FIO,
+				Number = model.Number,
+				OrganiserId = model.OrganiserId,
+			};
+		}
+	}
+}

Hotel/HotelDataModels/Models/IMealPlanModel.cs

@@ -2,7 +2,7 @@
 {
 	public interface IMealPlanModel : IId
 	{
-		string MealPlantName { get; }
+		string MealPlanName { get; }
 		double MealPlanPrice { get; }
 		int OrganiserId { get; }
 		public Dictionary<int, IParticipantModel> MealPlanParticipants { get; }