add error catching

console_ui/GroupUI.cs

@@ -0,0 +1,24 @@
+using domain.Service;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace console_ui
+{
+    class GroupUI
+    {
+        private readonly GroupService _groupService;
+        public GroupUI(GroupService groupService)
+        {
+            _groupService = groupService;
+        }
+
+        public void AddGroup()
+        {
+            Console.WriteLine("Enter group name: ");
+            _groupService.AddGroup(new domain.Request.AddGroupRequest { Name = Console.ReadLine() });
+        }
+    }
+}

console_ui/Program.cs

@@ -1,2 +1,25 @@
-// See https://aka.ms/new-console-template for more information
+using console_ui;
-Console.WriteLine("Hello, World!");
+using data;
+using data.DAO;
+using data.Repository;
+using domain.Service;
+
+void printAllGroups(IGroupRepository groupRepository)
+{
+    foreach (var item in groupRepository.getAllGroup())
+    {
+        Console.WriteLine(item.Name);
+    }
+}
+
+RemoteDatabaseContext remoteDatabaseContext = new RemoteDatabaseContext();
+SQLGroupRepository groupRepository = new SQLGroupRepository(remoteDatabaseContext);
+LocalGroupRepository localGroupRepository = new LocalGroupRepository();
+GroupService groupService = new GroupService(groupRepository);
+GroupUI group = new GroupUI(groupService);
+
+group.AddGroup();
+
+printAllGroups(groupRepository);
+
+

console_ui/console_ui.csproj

@@ -2,9 +2,14 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>net6.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
   </PropertyGroup>
 
+  <ItemGroup>
+    <ProjectReference Include="..\data\data.csproj" />
+    <ProjectReference Include="..\domain\domain.csproj" />
+  </ItemGroup>
+
 </Project>

data/DAO/Group.cs

@@ -6,9 +6,11 @@ using System.Threading.Tasks;
 
 namespace data.DAO
 {
-    internal class GroupDAO
+    public class GroupDAO
     {
         public int Id {  get; set; }
         public String Name { get; set; }
+        public virtual IEnumerable<UserDAO> Users { get; set; }
+
     }
 }

data/DAO/Presence.cs

@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace data.DAO
+{
+    internal class Presence
+    {
+    }
+}

data/DAO/User.cs

@@ -6,7 +6,7 @@ using System.Threading.Tasks;
 
 namespace data.DAO
 {
-    internal class User
+    public class UserDAO
     {
         public Guid Guid { get; set; }
         public string Name { get; set; }

data/Migrations/20241116153223_InitialCreate.Designer.cs

@@ -0,0 +1,83 @@
+// <auto-generated />
+using System;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+using data;
+
+#nullable disable
+
+namespace data.Migrations
+{
+    [DbContext(typeof(RemoteDatabaseContext))]
+    [Migration("20241116153223_InitialCreate")]
+    partial class InitialCreate
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "8.0.10")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
+
+            modelBuilder.Entity("data.DAO.GroupDAO", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("groups");
+                });
+
+            modelBuilder.Entity("data.DAO.UserDAO", b =>
+                {
+                    b.Property<Guid>("Guid")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uuid");
+
+                    b.Property<int>("GroupId")
+                        .HasColumnType("integer");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Guid");
+
+                    b.HasIndex("GroupId");
+
+                    b.ToTable("users");
+                });
+
+            modelBuilder.Entity("data.DAO.UserDAO", b =>
+                {
+                    b.HasOne("data.DAO.GroupDAO", "Group")
+                        .WithMany("Users")
+                        .HasForeignKey("GroupId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Group");
+                });
+
+            modelBuilder.Entity("data.DAO.GroupDAO", b =>
+                {
+                    b.Navigation("Users");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

data/Migrations/20241116153223_InitialCreate.cs

@@ -0,0 +1,63 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace data.Migrations
+{
+    /// <inheritdoc />
+    public partial class InitialCreate : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "groups",
+                columns: table => new
+                {
+                    Id = table.Column<int>(type: "integer", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    Name = table.Column<string>(type: "text", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_groups", x => x.Id);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "users",
+                columns: table => new
+                {
+                    Guid = table.Column<Guid>(type: "uuid", nullable: false),
+                    Name = table.Column<string>(type: "text", nullable: false),
+                    GroupId = table.Column<int>(type: "integer", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_users", x => x.Guid);
+                    table.ForeignKey(
+                        name: "FK_users_groups_GroupId",
+                        column: x => x.GroupId,
+                        principalTable: "groups",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_users_GroupId",
+                table: "users",
+                column: "GroupId");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "users");
+
+            migrationBuilder.DropTable(
+                name: "groups");
+        }
+    }
+}

data/Migrations/RemoteDatabaseContextModelSnapshot.cs

@@ -0,0 +1,80 @@
+// <auto-generated />
+using System;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+using data;
+
+#nullable disable
+
+namespace data.Migrations
+{
+    [DbContext(typeof(RemoteDatabaseContext))]
+    partial class RemoteDatabaseContextModelSnapshot : ModelSnapshot
+    {
+        protected override void BuildModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "8.0.10")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
+
+            modelBuilder.Entity("data.DAO.GroupDAO", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("groups");
+                });
+
+            modelBuilder.Entity("data.DAO.UserDAO", b =>
+                {
+                    b.Property<Guid>("Guid")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uuid");
+
+                    b.Property<int>("GroupId")
+                        .HasColumnType("integer");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Guid");
+
+                    b.HasIndex("GroupId");
+
+                    b.ToTable("users");
+                });
+
+            modelBuilder.Entity("data.DAO.UserDAO", b =>
+                {
+                    b.HasOne("data.DAO.GroupDAO", "Group")
+                        .WithMany("Users")
+                        .HasForeignKey("GroupId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Group");
+                });
+
+            modelBuilder.Entity("data.DAO.GroupDAO", b =>
+                {
+                    b.Navigation("Users");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

data/RemoteDatabaseContext.cs

@@ -0,0 +1,32 @@
+using data.DAO;
+using Microsoft.EntityFrameworkCore;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace data
+{
+    public class RemoteDatabaseContext: DbContext
+    {
+        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
+        {
+            optionsBuilder.UseNpgsql("Host=localhost;port=5432;Password=admin;Username=postgres;Database=semesterWork");
+        }
+
+        public DbSet<GroupDAO> groups { get; set; }
+
+        public DbSet<UserDAO> users { get; set; }
+
+        protected override void OnModelCreating(ModelBuilder modelBuilder)
+        {
+            modelBuilder.Entity<UserDAO>().HasKey(it => it.Guid);
+            modelBuilder.Entity<GroupDAO>().HasKey(it => it.Id);
+
+            modelBuilder.Entity<UserDAO>().Property(it => it.Guid).ValueGeneratedOnAdd();
+            modelBuilder.Entity<GroupDAO>().Property(it => it.Id).ValueGeneratedOnAdd();
+
+        }
+    }
+}

data/Repository/IGroupRepository.cs

@@ -0,0 +1,15 @@
+using data.DAO;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace data.Repository
+{
+    public interface IGroupRepository
+    {
+        public IEnumerable<GroupDAO> getAllGroup();
+        public bool addGroup(GroupDAO group);
+    }
+}

data/Repository/LocalGroupRepository.cs

@@ -0,0 +1,29 @@
+using data.DAO;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace data.Repository
+{
+    public class LocalGroupRepository : IGroupRepository
+    {
+        private IEnumerable<GroupDAO> _groups = new List<GroupDAO>()
+        {
+            new GroupDAO{ Id = 1, Name = "g1" },
+            new GroupDAO{ Id = 2, Name = "g2" },
+            new GroupDAO{ Id = 3, Name = "g3" },
+            new GroupDAO{ Id = 4, Name = "g4" }
+        };
+        public bool addGroup(GroupDAO group)
+        {
+            throw new NotImplementedException();
+        }
+
+        public IEnumerable<GroupDAO> getAllGroup()
+        {
+            return _groups;
+        }
+    }
+}

data/Repository/SQLGroupRepository.cs

@@ -0,0 +1,40 @@
+using data.DAO;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace data.Repository
+{
+    public class SQLGroupRepository : IGroupRepository
+    {
+        public readonly RemoteDatabaseContext dbContext;
+        public SQLGroupRepository(RemoteDatabaseContext remoteDatabaseContext)
+        {
+            dbContext = remoteDatabaseContext;
+        }
+        public bool addGroup(GroupDAO group)
+        {
+            try
+            {
+                dbContext.groups.Add(group);
+                return dbContext.SaveChanges() > 1;
+            }
+            catch (Exception ex) {
+                return false;
+            }
+        }
+
+        public IEnumerable<GroupDAO> getAllGroup()
+        {
+            try
+            {
+                return dbContext.groups.ToList();
+            }
+            catch (Exception ex) { 
+                return new List<GroupDAO>();
+            }
+        }
+    }
+}

data/data.csproj

@@ -1,9 +1,24 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net6.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
   </PropertyGroup>
 
+  <ItemGroup>
+    <Compile Remove="Migrations\**" />
+    <EmbeddedResource Remove="Migrations\**" />
+    <None Remove="Migrations\**" />
+  </ItemGroup>
+
+  <ItemGroup>
+	  <PackageReference Include="Microsoft.EntityFrameworkCore" Version="8.0.10" />
+	  <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="8.0.10">
+		  <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+		  <PrivateAssets>all</PrivateAssets>
+	  </PackageReference>
+	  <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="8.0.10" />
+  </ItemGroup>
+
 </Project>

domain/Class1.cs

@@ -0,0 +1,7 @@
+namespace domain
+{
+    public class Class1
+    {
+
+    }
+}

domain/Entity/GroupEntity.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace domain.Entity
+{
+    internal class GroupEntity
+    {
+        public int Id { get; set; }
+        public string Name { get; set; }
+        public string Description { get; set; }
+
+    }
+}

domain/Request/AddGroupRequest.cs

@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace domain.Request
+{
+    public class AddGroupRequest
+    {
+        public string Name { get; set; }
+
+    }
+}

domain/Service/GroupService.cs

@@ -0,0 +1,24 @@
+using data.Repository;
+using domain.Request;
+using domain.UseCase;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace domain.Service
+{
+    public class GroupService : IGroupUseCase
+    {
+        private readonly IGroupRepository _groupRepository;
+        public GroupService(IGroupRepository groupRepository)
+        {
+            _groupRepository = groupRepository;
+        }
+        public void AddGroup(AddGroupRequest addGroupRequest)
+        {
+            _groupRepository.addGroup(new data.DAO.GroupDAO { Name = addGroupRequest.Name });
+        }
+    }
+}

domain/UseCase/IGroupUseCase.cs

@@ -0,0 +1,14 @@
+using domain.Request;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace domain.UseCase
+{
+    public interface IGroupUseCase
+    {
+        public void AddGroup(AddGroupRequest addGroupRequest);
+    }
+}

domain/domain.csproj

@@ -0,0 +1,17 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <Folder Include="Response\" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\data\data.csproj" />
+  </ItemGroup>
+
+</Project>

semesterWork.sln

@@ -3,9 +3,11 @@ Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio Version 17
 VisualStudioVersion = 17.0.31903.59
 MinimumVisualStudioVersion = 10.0.40219.1
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "console_ui", "console_ui\console_ui.csproj", "{C66F54DD-3684-4790-87A7-A36355AB0BC7}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "console_ui", "console_ui\console_ui.csproj", "{C66F54DD-3684-4790-87A7-A36355AB0BC7}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "data", "data\data.csproj", "{28FE5F1E-5D2B-4750-AE24-A15BB8A5972D}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "data", "data\data.csproj", "{28FE5F1E-5D2B-4750-AE24-A15BB8A5972D}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "domain", "domain\domain.csproj", "{78C8AC9B-2B4D-4C71-8469-C6DAE16C9A63}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -21,6 +23,10 @@ Global
 		{28FE5F1E-5D2B-4750-AE24-A15BB8A5972D}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{28FE5F1E-5D2B-4750-AE24-A15BB8A5972D}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{28FE5F1E-5D2B-4750-AE24-A15BB8A5972D}.Release|Any CPU.Build.0 = Release|Any CPU
+		{78C8AC9B-2B4D-4C71-8469-C6DAE16C9A63}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{78C8AC9B-2B4D-4C71-8469-C6DAE16C9A63}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{78C8AC9B-2B4D-4C71-8469-C6DAE16C9A63}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{78C8AC9B-2B4D-4C71-8469-C6DAE16C9A63}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE