Start userservice application layer

UserService/UserService.Application/Interfaces/ILogger.cs

@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace UserService.Application.Interfaces
+{
+    public interface ILogger
+    {
+        void Log(string message);
+    }
+}

UserService/UserService.Application/Interfaces/Persistence/IUserRepository.cs

@@ -0,0 +1,19 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using UserService.Domain.Entities;
+
+namespace UserService.Application.Interfaces.Persistence
+{   
+
+    /* All concrete implementations for a user repository will implement this interface */
+    public interface IUserRepository
+    {
+
+        void CreateUser(string email, string password);
+
+        User GetUser(string email);
+
+    }
+}

UserService/UserService.Application/Interfaces/Persistence/IUserService.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using UserService.Domain.Entities;
+
+namespace UserService.Application.Interfaces.Persistence
+{
+    public interface IUserService
+    {
+
+        void Register(string username, string password);
+
+        User Login(string username, string password);
+    }
+}

UserService/UserService.Application/Services/UserService.cs

@@ -0,0 +1,41 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using UserService.Application.Interfaces;
+using UserService.Application.Interfaces.Persistence;
+using UserService.Domain.Entities;
+
+namespace UserService.Application.Services
+{
+    public class UserService : IUserService
+    {
+
+        private readonly IUserRepository _userRepository;
+        private readonly ILogger _logger;
+
+        public UserService(IUserRepository userRepository, ILogger logger)
+        {
+            this._userRepository = userRepository;
+            this._logger = logger;
+        }
+
+        public void Register(string username, string password)
+        {
+            try {
+
+                //logic
+
+            } catch(Exception err) {
+                _logger.Log(err.Message);
+            }
+        }
+
+        public User Login(string username, string password)
+        {
+
+            throw new NotImplementedException();
+
+        }
+    }
+}

UserService/UserService.Application/UserService.Application.csproj

@@ -1,5 +1,9 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
+  <ItemGroup>
+    <ProjectReference Include="..\UserService.Domain\UserService.Domain.csproj" />
+  </ItemGroup>
+
   <PropertyGroup>
     <TargetFramework>net8.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>

UserService/UserService.Application/UserService.Application.sln

@@ -0,0 +1,25 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.5.002.0
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "UserService.Application", "UserService.Application.csproj", "{C43A8D5F-7F20-43D7-9D6F-275641EB9147}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{C43A8D5F-7F20-43D7-9D6F-275641EB9147}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{C43A8D5F-7F20-43D7-9D6F-275641EB9147}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{C43A8D5F-7F20-43D7-9D6F-275641EB9147}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{C43A8D5F-7F20-43D7-9D6F-275641EB9147}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {1E9CE0BC-CBEC-4B1D-BCEA-3E7D7FAFC1AB}
+	EndGlobalSection
+EndGlobal

UserService/UserService.Domain/Entities/User.cs

@@ -35,7 +35,5 @@ public HashSet<UserId> GetFollowers()
     {
         return this._followers;
     }
-
-
 
 }