[FA-55] User Service backend initial setup

FictionArchive.Service.UserService/GraphQL/Mutation.cs

@@ -1,38 +1,53 @@
-using FictionArchive.Service.Shared.Constants;
+using System.Security.Claims;
 using FictionArchive.Service.UserService.Models.DTOs;
 using FictionArchive.Service.UserService.Services;
 using HotChocolate.Authorization;
+using HotChocolate.Types;
 
 namespace FictionArchive.Service.UserService.GraphQL;
 
 public class Mutation
 {
-    [Authorize(Roles = [AuthorizationConstants.Roles.Admin])]
-    public async Task<UserDto> RegisterUser(string username, string email, string oAuthProviderId,
-        string? inviterOAuthProviderId, UserManagementService userManagementService)
+    [Authorize]
+    [Error<InvalidOperationException>]
+    public async Task<UserDto> InviteUser(
+        string email,
+        string username,
+        UserManagementService userManagementService,
+        ClaimsPrincipal claimsPrincipal)
     {
-        var user = await userManagementService.RegisterUser(username, email, oAuthProviderId, inviterOAuthProviderId);
+        // Get the current user's OAuth provider ID from claims
+        var oAuthProviderId = claimsPrincipal.FindFirst("sub")?.Value;
+        if (string.IsNullOrEmpty(oAuthProviderId))
+        {
+            throw new InvalidOperationException("Unable to determine current user identity");
+        }
+
+        // Get the inviter from the database
+        var inviter = await userManagementService.GetUserByOAuthProviderIdAsync(oAuthProviderId);
+        if (inviter == null)
+        {
+            throw new InvalidOperationException("Current user not found in the system");
+        }
+
+        // Invite the new user
+        var newUser = await userManagementService.InviteUserAsync(inviter, email, username);
+        if (newUser == null)
+        {
+            throw new InvalidOperationException(
+                "Failed to invite user. Either you have no available invites, or the email/username is already in use.");
+        }
 
         return new UserDto
         {
-            Id = user.Id,
-            CreatedTime = user.CreatedTime,
-            LastUpdatedTime = user.LastUpdatedTime,
-            Username = user.Username,
-            Email = user.Email,
-            Disabled = user.Disabled,
-            Inviter = user.Inviter != null
-                ? new UserDto
-                {
-                    Id = user.Inviter.Id,
-                    CreatedTime = user.Inviter.CreatedTime,
-                    LastUpdatedTime = user.Inviter.LastUpdatedTime,
-                    Username = user.Inviter.Username,
-                    Email = user.Inviter.Email,
-                    Disabled = user.Inviter.Disabled,
-                    Inviter = null // Limit recursion to one level
-                }
-                : null
+            Id = newUser.Id,
+            CreatedTime = newUser.CreatedTime,
+            LastUpdatedTime = newUser.LastUpdatedTime,
+            Username = newUser.Username,
+            Email = newUser.Email,
+            Disabled = newUser.Disabled,
+            AvailableInvites = newUser.AvailableInvites,
+            InviterId = newUser.InviterId
         };
     }
 }