MongoDB connected. User registration implemented.

QRBeeApi/Controllers/QRBeeController.cs

@@ -18,7 +18,7 @@ namespace QRBee.Api.Controllers
             _service = service;
         }
 
-        [HttpPost]
+        [HttpPost("Register")]
         public Task<RegistrationResponse>  Register([FromBody] RegistrationRequest value)
         {
             return _service.Register(value);

QRBeeApi/DatabaseSettings.cs

@@ -5,6 +5,7 @@ namespace QRBee.Api
     public class DatabaseSettings
     {
         public string? ConnectionString { get; set;}
+        public string? DatabaseName { get; set; }
 
         public MongoClientSettings ToMongoDbSettings()
         {

QRBeeApi/Program.cs

@@ -1,3 +1,4 @@
+using Microsoft.Extensions.Options;
 using MongoDB.Driver;
 using QRBee.Api;
 using QRBee.Api.Services;
@@ -12,10 +13,12 @@ builder.Services.AddControllers();
 builder.Services.AddEndpointsApiExplorer();
 builder.Services.AddSwaggerGen();
 
-builder.Services.AddSingleton<IQRBeeAPI,QRBeeAPI>();
+builder.Services
-builder.Services.AddSingleton<IStorage, Storage>();
+    .AddSingleton<IQRBeeAPI,QRBeeAPI>()
-builder.Services.Configure<DatabaseSettings>(builder.Configuration.GetSection("QRBeeDatabase"));
+    .AddSingleton<IStorage, Storage>()
-builder.Services.AddSingleton<IMongoClient>( cfg => new MongoClient(cfg.GetRequiredService<DatabaseSettings>().ToMongoDbSettings()));
+    .Configure<DatabaseSettings>(builder.Configuration.GetSection("QRBeeDatabase"))
+    .AddSingleton<IMongoClient>( cfg => new MongoClient(cfg.GetRequiredService<IOptions<DatabaseSettings>>().Value.ToMongoDbSettings()))
+    ;
 
 var app = builder.Build();
 

QRBeeApi/Services/Database/IStorage.cs

@@ -1,12 +1,10 @@
-using Microsoft.AspNetCore.Identity;
+namespace QRBee.Api.Services.Database
-
-namespace QRBee.Api.Services
 {
     public interface IStorage
     {
 
-        void PutUserInfo(UserInfo info);
+        Task<string> PutUserInfo(UserInfo info);
-        UserInfo GetUserInfo(string email);
+        Task<UserInfo> GetUserInfo(string email);
 
     }
 }

QRBeeApi/Services/Database/Storage.cs

@@ -1,17 +1,56 @@
-namespace QRBee.Api.Services.Database
+using Microsoft.Extensions.Options;
+using MongoDB.Driver;
+
+namespace QRBee.Api.Services.Database
 {
     public class Storage: IStorage
     {
-        public void PutUserInfo(UserInfo info)
+
+        private readonly IMongoDatabase _database;
+
+        public Storage(IMongoClient client, IOptions<DatabaseSettings> settings)
         {
-            throw new NotImplementedException();
+            var name = settings.Value.DatabaseName;
+            
+            _database = client.GetDatabase(name);
         }
 
-        public UserInfo GetUserInfo(string email)
+        public async Task<string> PutUserInfo(UserInfo info)
         {
-            throw new NotImplementedException();
+            
+            var collection = _database.GetCollection<UserInfo>("Users");
+
+            var user = await TryGetUserInfo(info.Email);
+
+            // Ignore re-register 
+            // Potential vulnerability if user registers with other email
+            if (user == null)
+            {
+                await collection.InsertOneAsync(info);
+                return info.ClientId ?? throw new ApplicationException($"ClientId is null while adding user {info.Email}");
+            }
+            return user.ClientId ?? throw new ApplicationException($"ClientId is null while adding user {info.Email}");
+            
+            
         }
 
+        internal async Task<UserInfo?> TryGetUserInfo(string email)
+        {
+            var collection = _database.GetCollection<UserInfo>("Users");
+            using var cursor = await collection.FindAsync($"{{ Email: \"{email}\" }}");
+            if (!await cursor.MoveNextAsync())
+            {
+                return null;
+            }
+
+            return cursor.Current.FirstOrDefault();
+        }
+
+        public async Task<UserInfo> GetUserInfo(string email)
+        {
+            var user = await TryGetUserInfo(email);
+            return user ?? throw new ApplicationException($"User {email} not found.");
+        }
 
     }
 }

QRBeeApi/Services/Database/UserInfo.cs

@@ -1,8 +1,13 @@
-namespace QRBee.Api.Services;
+using MongoDB.Bson;
+using MongoDB.Bson.Serialization.Attributes;
+
+namespace QRBee.Api.Services.Database;
 
 public record UserInfo
 {
+#pragma warning disable CS8618
     public UserInfo()
+#pragma warning restore CS8618
     {
 
     }
@@ -14,27 +19,14 @@ public record UserInfo
         DateOfBirth = dateOfBirth;
     }
 
-    public string? Name
+    /// <summary>
-    {
+    /// Never use directly. Use <see cref="ClientId"/> instead.
-        get;
+    /// </summary>
-        set;
+    [BsonId] public ObjectId Id { get; set; }
-    }
 
-    public string? Email
+    [BsonIgnore] public string? ClientId => Id == ObjectId.Empty ? null :  Id.ToString();
-    {
+    public string Name             { get; set; }
-        get;
+    public string Email            { get; set; }
-        set;
+    public string DateOfBirth      { get; set; }
-    }
+    public bool RegisterAsMerchant { get; set; }
-
-    public string? DateOfBirth
-    {
-        get;
-        set;
-    }
-
-    public bool RegisterAsMerchant
-    {
-        get;
-        set;
-    }
 }

QRBeeApi/Services/QRBeeAPI.cs

@@ -1,4 +1,6 @@
-using System.Text.RegularExpressions;
+using System.Globalization;
+using System.Text.RegularExpressions;
+using QRBee.Api.Services.Database;
 using QRBee.Core;
 using QRBee.Core.Data;
 
@@ -7,32 +9,27 @@ namespace QRBee.Api.Services
     public class QRBeeAPI: IQRBeeAPI
     {
         private readonly IStorage _storage;
+        private const int MaxNameLength = 512;
+        private const int MaxEmailLength = 512;
 
         public QRBeeAPI(IStorage storage)
         {
             _storage = storage;
         }
 
-        public Task<RegistrationResponse> Register(RegistrationRequest request)
+        public async Task<RegistrationResponse> Register(RegistrationRequest request)
         {
-            throw new NotImplementedException();
 
             Validate(request);
 
             var info = Convert(request);
             
-            if (UserExists(info))
+            var clientId = await _storage.PutUserInfo(info);
-            {
+
-                // throw error
+            return new RegistrationResponse{ClientId = clientId};
-            }
-            else
-            {
-                _storage.PutUserInfo(info);
         }
 
-        }
+        private static void Validate(RegistrationRequest request)
-
-        private void Validate(RegistrationRequest request)
         {
             if (request == null)
             {
@@ -43,19 +40,25 @@ namespace QRBee.Api.Services
             var email = request.Email;
             var dateOfBirth = request.DateOfBirth;
 
-            if (string.IsNullOrEmpty(name) || name.All(char.IsLetter)==false || name.Length>=30)
+            if (string.IsNullOrEmpty(name) || name.All(char.IsLetter)==false || name.Length>=MaxNameLength)
             {
-                // throw exception
+                throw new ApplicationException($"Name \"{name}\" isn't valid");
             }
 
-            var freq = Regex.Matches(email, '@'.ToString()).Count;
+            var freq = Regex.Matches(email, @"[^@]+@[^@]+").Count;
 
-            if (string.IsNullOrEmpty(email) || email.Contains('@')==false || freq>=2 || email.Length >= 30)
+            if (string.IsNullOrEmpty(email) || email.IndexOf('@')<0 || freq>=2 || email.Length >= MaxEmailLength)
             {
-                // throw exception
+                throw new ApplicationException($"Email \"{email}\" isn't valid");
             }
 
-            // DateOfBirth check 
+            if (!DateTime.TryParseExact(dateOfBirth, "yyyy-MM-dd", null, DateTimeStyles.AssumeUniversal, out var check)
+                || check > DateTime.UtcNow - TimeSpan.FromDays(365 * 8)
+                || check < DateTime.UtcNow - TimeSpan.FromDays(365 * 100)
+               )
+            {
+                throw new ApplicationException($"DateOfBirth \"{dateOfBirth}\" isn't valid");
+            }
 
         }
 
@@ -64,11 +67,5 @@ namespace QRBee.Api.Services
             return new UserInfo(request.Name, request.Email, request.DateOfBirth);
         }
 
-        private bool UserExists(UserInfo info)
-        {
-            var user = _storage.GetUserInfo(info.Email);
-
-            return user == info;
-        }
     }
 }

QRBeeApi/appsettings.json

@@ -2,9 +2,7 @@
 
   "QRBeeDatabase": {
     "ConnectionString": "mongodb://localhost:27017",
-    "DatabaseName": "QRBee",
+    "DatabaseName": "QRBee"
-    "User": "",
-    "Password": "" 
   },
 
   "Logging": {