Add application services for profiles and neutrino

RecNet.Application/Common/Interfaces/IConfigService.cs

@@ -0,0 +1,7 @@
+namespace RecNet.Application.Common.Interfaces;
+
+public interface IConfigService
+{
+    Task<T?> GetAsync<T>(string key, T? defaultValue = default, CancellationToken ct = default);
+    Task SetAsync<T>(string key, T value, CancellationToken ct = default);
+}

RecNet.Application/Common/Interfaces/ITokenService.cs

@@ -0,0 +1,10 @@
+using RecNet.Application.Common.Tokens;
+using RecNet.Domain.Entities.Profiles;
+
+namespace RecNet.Application.Common.Interfaces;
+
+public interface ITokenService
+{
+    TokenResult GenerateProfileToken(Profile profile);
+    TokenVerifyResult VerifyToken(string token);
+}

RecNet.Application/Common/Tokens/TokenResult.cs

@@ -0,0 +1,5 @@
+namespace RecNet.Application.Common.Tokens;
+
+public sealed record TokenResult(
+    string AccessToken,
+    int ExpiresIn);

RecNet.Application/Common/Tokens/TokenVerifyResult.cs

@@ -0,0 +1,12 @@
+namespace RecNet.Application.Common.Tokens;
+
+public sealed record TokenVerifyResult(
+    bool Succeeded,
+    Guid? ProfileId)
+{
+    public static TokenVerifyResult Success(Guid profileId)
+        => new(true, profileId);
+
+    public static TokenVerifyResult Failure()
+        => new(false, null);
+}

RecNet.Application/DependencyInjection.cs

@@ -1,4 +1,6 @@
 using Microsoft.Extensions.DependencyInjection;
+using RecNet.Application.Neutrino;
+using RecNet.Application.Profiles;
 
 namespace RecNet.Application;
 
@@ -7,9 +9,8 @@ public static class DependencyInjection
     public static IServiceCollection AddApplication(this IServiceCollection services)
     {
         services.AddAutoMapper(_ => { }, typeof(DependencyInjection).Assembly);
-        
-        // Usually there would be CQRS, but I'm rushing out this server, so I didn't feel like adding it.
-        // Enjoy a VERY barebones application layer :D
+        services.AddScoped<IProfileService, ProfileService>();
+        services.AddScoped<INeutrinoAuthorizationService, NeutrinoAuthorizationService>();
 
         return services;
     }

RecNet.Application/Neutrino/AuthorizeNeutrinoCommand.cs

@@ -0,0 +1,5 @@
+namespace RecNet.Application.Neutrino;
+
+public sealed record AuthorizeNeutrinoCommand(
+    Guid ProfileId,
+    string AccessToken);

RecNet.Application/Neutrino/INeutrinoAuthorizationService.cs

@@ -0,0 +1,8 @@
+namespace RecNet.Application.Neutrino;
+
+public interface INeutrinoAuthorizationService
+{
+    Task<NeutrinoAuthorizationResult> AuthorizeAsync(
+        AuthorizeNeutrinoCommand command,
+        CancellationToken ct = default);
+}

RecNet.Application/Neutrino/NeutrinoAuthorizationFailure.cs

@@ -0,0 +1,7 @@
+namespace RecNet.Application.Neutrino;
+
+public enum NeutrinoAuthorizationFailure
+{
+    InvalidParameters,
+    AuthenticationFailed
+}

RecNet.Application/Neutrino/NeutrinoAuthorizationResult.cs

@@ -0,0 +1,17 @@
+namespace RecNet.Application.Neutrino;
+
+public sealed record NeutrinoAuthorizationResult(
+    bool Succeeded,
+    NeutrinoAuthorizationFailure? Failure,
+    string? UserId,
+    string? Nickname)
+{
+    public static NeutrinoAuthorizationResult Success(Guid userId, string nickname)
+        => new(true, null, userId.ToString(), nickname);
+
+    public static NeutrinoAuthorizationResult InvalidParameters()
+        => new(false, NeutrinoAuthorizationFailure.InvalidParameters, null, null);
+
+    public static NeutrinoAuthorizationResult AuthenticationFailed()
+        => new(false, NeutrinoAuthorizationFailure.AuthenticationFailed, null, null);
+}

RecNet.Application/Neutrino/NeutrinoAuthorizationService.cs

@@ -0,0 +1,30 @@
+using RecNet.Application.Common.Interfaces;
+using RecNet.Domain.Repositories;
+
+namespace RecNet.Application.Neutrino;
+
+public class NeutrinoAuthorizationService(
+    IProfileRepository profileRepository,
+    ITokenService tokenService) : INeutrinoAuthorizationService
+{
+    public async Task<NeutrinoAuthorizationResult> AuthorizeAsync(
+        AuthorizeNeutrinoCommand command,
+        CancellationToken ct = default)
+    {
+        if (command.ProfileId == Guid.Empty || string.IsNullOrWhiteSpace(command.AccessToken))
+            return NeutrinoAuthorizationResult.InvalidParameters();
+
+        var tokenVerifyResult = tokenService.VerifyToken(command.AccessToken);
+        if (!tokenVerifyResult.Succeeded || tokenVerifyResult.ProfileId is null)
+            return NeutrinoAuthorizationResult.AuthenticationFailed();
+
+        if (tokenVerifyResult.ProfileId.Value != command.ProfileId)
+            return NeutrinoAuthorizationResult.AuthenticationFailed();
+
+        var profile = await profileRepository.GetByIdAsync(command.ProfileId, ct);
+        if (profile is null)
+            return NeutrinoAuthorizationResult.AuthenticationFailed();
+
+        return NeutrinoAuthorizationResult.Success(profile.ProfileId, profile.Name);
+    }
+}

RecNet.Application/Profiles/IProfileService.cs

@@ -0,0 +1,8 @@
+namespace RecNet.Application.Profiles;
+
+public interface IProfileService
+{
+    Task<ProfileDTO?> GetProfileAsync(Guid profileId, CancellationToken ct = default);
+    Task<IReadOnlyList<ProfileDTO>> GetProfilesAsync(List<Guid> profileIds, CancellationToken ct = default);
+    Task<LoginProfileResult> LoginAsync(LoginProfileCommand command, CancellationToken ct = default);
+}

RecNet.Application/Profiles/LoginProfileCommand.cs

@@ -0,0 +1,9 @@
+using RecNet.Domain.Common;
+
+namespace RecNet.Application.Profiles;
+
+public sealed record LoginProfileCommand(
+    string DeviceId,
+    PlatformType PlatformType,
+    string PlatformId,
+    string PlatformAuthentication);

RecNet.Application/Profiles/LoginProfileResult.cs

@@ -0,0 +1,33 @@
+namespace RecNet.Application.Profiles;
+
+
+
+public class LoginProfileResult
+{
+    public bool Succeeded { get; set; }
+    public string? Message { get; set; }
+    
+    public ProfileDTO? Profile { get; set; }
+    public string? AccessToken { get; set; }
+    public int ExpiresIn { get; set; }
+    
+    public static LoginProfileResult Success(ProfileDTO profile, string accessToken, int expiresIn)
+    {
+        return new LoginProfileResult
+        {
+            Succeeded = true,
+            Profile = profile,
+            AccessToken = accessToken,
+            ExpiresIn = expiresIn
+        };
+    }
+
+    public static LoginProfileResult Fail(string? message = null)
+    {
+        return new LoginProfileResult
+        {
+            Succeeded = false,
+            Message = message
+        };
+    }
+}

RecNet.Application/Profiles/ProfileDto.cs

@@ -1,12 +1,8 @@
-using System.Text.Json.Serialization;
-
 namespace RecNet.Application.Profiles;
 
 public class ProfileDTO
 {
-    [JsonPropertyName("ProfileId")]
     public Guid ProfileId { get; init; }
-    
-    [JsonPropertyName("Name")]
+
     public required string Name { get; init; }
-}
+}

RecNet.Application/Profiles/ProfileService.cs

@@ -0,0 +1,69 @@
+using AutoMapper;
+using RecNet.Application.Common.Interfaces;
+using RecNet.Domain.Repositories;
+using ProfileEntity = RecNet.Domain.Entities.Profiles.Profile;
+
+namespace RecNet.Application.Profiles;
+
+public class ProfileService(
+    IProfileRepository profileRepository,
+    ITokenService tokenService,
+    IMapper mapper) : IProfileService
+{
+    public async Task<ProfileDTO?> GetProfileAsync(Guid profileId, CancellationToken ct = default)
+    {
+        var profile = await profileRepository.GetByIdAsync(profileId, ct);
+
+        return profile is null
+            ? null
+            : mapper.Map<ProfileDTO>(profile);
+    }
+
+    public async Task<IReadOnlyList<ProfileDTO>> GetProfilesAsync(
+        List<Guid> profileIds,
+        CancellationToken ct = default)
+    {
+        var profiles = await profileRepository.GetByIdsAsync(profileIds, ct);
+
+        return mapper.Map<List<ProfileDTO>>(profiles);
+    }
+
+    public async Task<LoginProfileResult> LoginAsync(
+        LoginProfileCommand command,
+        CancellationToken ct = default)
+    {
+        var profile = await profileRepository.GetByPlatform(
+            command.PlatformType,
+            command.PlatformId,
+            ct);
+
+        if (profile is null)
+        {
+            profile = ProfileEntity.Create(
+                GenerateRandomName(),
+                command.PlatformType,
+                command.PlatformId);
+
+            await profileRepository.AddAsync(profile, ct);
+        }
+
+        profile.AddDeviceId(command.DeviceId);
+
+        await profileRepository.SaveChangesAsync(ct);
+
+        if (profile.IsBanned)
+            return LoginProfileResult.Fail("Profile is banned");
+
+        var token = tokenService.GenerateProfileToken(profile);
+
+        return LoginProfileResult.Success(
+            profile: mapper.Map<ProfileDTO>(profile),
+            accessToken: token.AccessToken,
+            expiresIn: token.ExpiresIn
+        );
+    }
+
+    // Temporary until platform/user-name verification becomes a real use case.
+    private static string GenerateRandomName()
+        => string.Concat("rr", Guid.NewGuid().ToString("N").AsSpan(0, 18));
+}