identity: simplify user sign up

Streetwriters.Common/Interfaces/IUserAccountService.cs

@@ -16,5 +16,7 @@ namespace Streetwriters.Common.Interfaces
         Task<bool> ResetPasswordAsync(string userId, string newPassword);
         [WampProcedure("co.streetwriters.identity.users.clear_sessions")]
         Task<bool> ClearSessionsAsync(string userId, string clientId, bool all, string jti, string? refreshToken);
+        [WampProcedure("co.streetwriters.identity.users.create_user")]
+        Task<SignupResponse> CreateUserAsync(string clientId, string email, string password, string? userAgent = null);
     }
 }

Streetwriters.Common/Models/SignupForm.cs

@@ -0,0 +1,57 @@
+/*
+This file is part of the Notesnook Sync Server project (https://notesnook.com/)
+
+Copyright (C) 2023 Streetwriters (Private) Limited
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the Affero GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+Affero GNU General Public License for more details.
+
+You should have received a copy of the Affero GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+using System.ComponentModel.DataAnnotations;
+using System.Runtime.Serialization;
+using Microsoft.AspNetCore.Mvc;
+
+namespace Streetwriters.Common.Models
+{
+    public class SignupForm
+    {
+        [Required]
+        [StringLength(120, ErrorMessage = "Password must be longer than or equal to 8 characters.", MinimumLength = 8)]
+        [BindProperty(Name = "password")]
+        public required string Password
+        {
+            get; set;
+        }
+
+        [Required]
+        [BindProperty(Name = "email")]
+        [EmailAddress]
+        public required string Email
+        {
+            get; set;
+        }
+
+        [BindProperty(Name = "username")]
+        public string? Username
+        {
+            get; set;
+        }
+
+        [Required]
+        [BindProperty(Name = "client_id")]
+        public required string ClientId
+        {
+            get; set;
+        }
+    }
+}

Streetwriters.Common/Models/SignupResponse.cs

@@ -0,0 +1,30 @@
+using System.Collections.Generic;
+using System.Linq;
+using System.Text.Json.Serialization;
+using Streetwriters.Common.Models;
+
+namespace Streetwriters.Common.Models
+{
+    public class SignupResponse
+    {
+        [JsonPropertyName("access_token")]
+        public string AccessToken { get; set; }
+        [JsonPropertyName("expires_in")]
+        public int AccessTokenLifetime { get; set; }
+        [JsonPropertyName("refresh_token")]
+        public string RefreshToken { get; set; }
+        [JsonPropertyName("scope")]
+        public string Scope { get; set; }
+        [JsonPropertyName("user_id")]
+        public string UserId { get; set; }
+        public string[]? Errors { get; set; }
+
+        public static SignupResponse Error(IEnumerable<string> errors)
+        {
+            return new SignupResponse
+            {
+                Errors = [.. errors]
+            };
+        }
+    }
+}