some work

OwnChar/Data/ClientServer/ClientServerDataProvider.cs

@@ -0,0 +1,30 @@
+using OwnChar.Model;
+using Pilz.Cryptography;
+
+namespace OwnChar.Data.ClientServer
+{
+    public class ClientServerDataProvider : IDataProvider
+    {
+        public UserAccount? CurrentUserAccount => throw new NotImplementedException();
+
+        public ClientServerDataProvider(string serverAddress)
+        {
+            throw new NotImplementedException();
+        }
+
+        public UserProfile? GetUserProfile(string username)
+        {
+            throw new NotImplementedException();
+        }
+
+        public UserAccount? Login(string username, SecureString password)
+        {
+            throw new NotImplementedException();
+        }
+
+        public bool Logout()
+        {
+            throw new NotImplementedException();
+        }
+    }
+}

OwnChar/Data/ClientServerDataProvider.cs

@@ -1,52 +0,0 @@
-using OwnChar.Model;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace OwnChar.Data
-{
-    public class ClientServerDataProvider : IDataProvider
-    {
-        public bool Save(Character character)
-        {
-        }
-
-        public bool Save(UserProfile profile)
-        {
-        }
-
-        public bool Save(UserAccount account)
-        {
-        }
-
-        public bool Save(Group group)
-        {
-        }
-
-        public bool Save(PropertyCategory category)
-        {
-        }
-
-        public bool Delete(Character character)
-        {
-        }
-
-        public bool Delete(UserProfile profile)
-        {
-        }
-
-        public bool Delete(UserAccount account)
-        {
-        }
-
-        public bool Delete(Group group)
-        {
-        }
-
-        public bool Delete(PropertyCategory category)
-        {
-        }
-    }
-}

OwnChar/Data/IDataProvider.cs

@@ -1,12 +1,22 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
+using OwnChar.Model;
+using Pilz.Cryptography;
 
 namespace OwnChar.Data
 {
     public interface IDataProvider
     {
+        // Properties
+        public bool IsLoggedIn => CurrentUserAccount != null;
+        public UserProfile? CurrentUserProfile => CurrentUserAccount?.Profile;
+
+        // Properties (abstract)
+        abstract UserAccount? CurrentUserAccount { get; }
+
+        // Methods (abstract)
+        abstract UserAccount? Initialize(bool force);
+        abstract UserProfile? GetUserProfile(string username);
+        abstract UserAccount? Login(string username, string password);
+        abstract bool Logout();
+        abstract UserAccount? CreateUser(string username, string password);
     }
 }

OwnChar/Data/JsonFile/JsonFile.cs

@@ -0,0 +1,14 @@
+using OwnChar.Model;
+
+namespace OwnChar.Data.JsonFile
+{
+    public class JsonFile
+    {
+        public List<UserAccount> UserAccounts { get; } = [];
+        public List<UserProfile> UserProfiles { get; } = [];
+        public List<Character> Characters { get; } = [];
+        public List<Group> Groups { get; } = [];
+        public List<Property> Properties { get; } = [];
+        public List<PropertyCategory> PropertyCategories { get; } = [];
+    }
+}

OwnChar/Data/JsonFile/JsonFileDataProvider.cs

@@ -0,0 +1,87 @@
+using Newtonsoft.Json;
+using OwnChar.Model;
+
+namespace OwnChar.Data.JsonFile
+{
+    public class JsonFileDataProvider : IDataProvider
+    {
+        public JsonFile JsonFile { get; protected set; }
+        public string JsonFilePath { get; protected set; }
+        public UserAccount? CurrentUserAccount { get; protected set; }
+
+        public JsonFileDataProvider(string filePath)
+        {
+            JsonFilePath = filePath;
+            LoadFile();
+
+            // Get rid of bad compiler warnings
+            if (JsonFile == null)
+                throw new Exception("Something went incredible wrong at initialization of the JsonFile.");
+        }
+
+        public UserAccount? Initialize(bool force)
+        {
+            if (force || JsonFile.UserAccounts.Count == 0)
+                CreateUser("admin", "admin");
+            return CurrentUserAccount;
+        }
+
+        protected void LoadFile()
+        {
+            if (JsonConvert.DeserializeObject<JsonFile>(File.ReadAllText(JsonFilePath), CreateJsonSerializerSettings()) is JsonFile jsonFile)
+                JsonFile = jsonFile;
+            JsonFile ??= new();
+            CurrentUserAccount = Initialize(false);
+        }
+
+        protected void SaveFile()
+        {
+            File.WriteAllText(JsonFilePath, JsonConvert.SerializeObject(JsonFile, CreateJsonSerializerSettings()));
+        }
+
+        protected JsonSerializerSettings CreateJsonSerializerSettings()
+        {
+            return new JsonSerializerSettings
+            {
+                PreserveReferencesHandling = PreserveReferencesHandling.All,
+                ReferenceLoopHandling = ReferenceLoopHandling.Serialize,
+                TypeNameHandling = TypeNameHandling.Auto,
+                Formatting = Formatting.Indented,
+            };
+        }
+
+        public UserAccount? Login(string username, string password)
+        {
+            return CurrentUserAccount = JsonFile.UserAccounts.FirstOrDefault(n => !string.IsNullOrWhiteSpace(n.Username) && !string.IsNullOrWhiteSpace(n.Password) && n.Username == username && n.Password == password);
+        }
+
+        public bool Logout()
+        {
+            CurrentUserAccount = null;
+            return true;
+        }
+
+        public UserAccount? CreateUser(string username, string password)
+        {
+            var account = new UserAccount
+            {
+                Username = username,
+                Password = password,
+                Profile = new()
+                {
+                    Name = username,
+                }
+            };
+
+            JsonFile.UserAccounts.Add(account);
+            JsonFile.UserProfiles.Add(account.Profile);
+
+            return account;
+        }
+
+        public UserProfile? GetUserProfile(string username)
+        {
+            return JsonFile.UserProfiles.FirstOrDefault(n => !string.IsNullOrWhiteSpace(n.Account?.Username) && n.Account.Username == username);
+        }
+    }
+}

OwnChar/Data/JsonFileDataProvider.cs

@@ -1,12 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace OwnChar.Data
-{
-    public class JsonFileDataProvider : IDataProvider
-    {
-    }
-}

OwnChar/Manager/CharacterManager.cs

@@ -12,7 +12,7 @@ namespace OwnChar.Manager
         public OwnCharManager Manager { get; } = manager;
 
         /// <summary>
-        /// Gets personal characters.
+        /// Gets all personal characters (private & within groups).
         /// </summary>
         /// <param name="group"></param>
         /// <returns>Returns a collection with personal characters.</returns>
@@ -21,7 +21,7 @@ namespace OwnChar.Manager
             if (!IsLoggedIn || UserProfile == null)
                 return null;
 
-            return GetCharacters(UserProfile.Group);
+            return GetCharacters(Manager.CurrentUser);
         }
 
         /// <summary>

OwnChar/Manager/Exceptions/LoginException.cs

@@ -0,0 +1,6 @@
+namespace OwnChar.Manager.Exceptions
+{
+    public class LoginException(string message) : Exception(message)
+    {
+    }
+}

OwnChar/Manager/OwnCharManager.cs

@@ -1,4 +1,5 @@
 using OwnChar.Data;
+using OwnChar.Manager.Exceptions;
 using OwnChar.Model;
 using Pilz.Cryptography;
 
@@ -7,32 +8,50 @@ namespace OwnChar.Manager
     public class OwnCharManager
     {
         // User
-        public bool IsLoggedIn { get; set; }
-        public UserAccount? CurrentUser { get; set; }
+        public bool IsLoggedIn => DataProvider != null && DataProvider.IsLoggedIn;
+        public UserAccount? CurrentUser => DataProvider?.CurrentUserAccount;
 
         // Data Provider
-        public IDataProvider DataProvider { get; set; }
+        public IDataProvider? DataProvider { get; set; }
 
         // Manager
         public UserManager Users { get; }
         public GroupsManager Groups { get; }
         public CharacterManager Characters { get; }
 
-        public OwnCharManager(IDataProvider dataProvider)
+        public OwnCharManager()
         {
-            DataProvider = dataProvider;
             Users = new(this);
             Groups = new(this);
             Characters = new(this);
         }
 
+        private void CheckLogin()
+        {
+            if (!IsLoggedIn)
+                throw new LoginException("You are already logged in!");
+        }
+
         /// <summary>
-        /// Tries to login on the server.
+        /// Tries to login on the given data provider.
         /// </summary>
         /// <returns>Returns <see cref="true"/> if the login was successfull and <see cref="false"/> if not.</returns>
-        public bool Login(string username, SecureString password)
+        public bool Login(IDataProvider? dataProvider, string username, SecureString password)
         {
-            return IsLoggedIn = true; // TODO: Change `true` to the real check.
+            CheckLogin();
+            ArgumentNullException.ThrowIfNull(dataProvider);
+            return dataProvider.Login(username, password) != null;
+        }
+
+        /// <summary>
+        /// Closes the session on the current data provider.
+        /// </summary>
+        /// <returns></returns>
+        public bool Logout()
+        {
+            if (DataProvider != null)
+                return DataProvider.Logout();
+            return true;
         }
     }
 }

OwnChar/Model/UserAccount.cs

@@ -3,15 +3,9 @@
     public class UserAccount
     {
         public ulong Id { get; set; }
-        public string Username { get; set; }
-        public string Email { get; set; }
-        public string Password { get; set; }
-
-        internal UserAccount(string email, string username, string password)
-        {
-            Username = username;
-            Email = email;
-            Password = password;
-        }
+        public string? Username { get; set; }
+        public string? Password { get; set; }
+        public string? Email { get; set; }
+        public UserProfile? Profile { get; set; }
     }
 }

OwnChar/Model/UserProfile.cs

@@ -1,9 +1,9 @@
 namespace OwnChar.Model
 {
-    public class UserProfile(string name)
+    public class UserProfile
     {
         public ulong Id { get; set; }
-        public string Name { get; set; } = name;
+        public string? Name { get; set; }
         public UserAccount? Account { get; set; }
     }
 }

OwnChar/Model/UserType.cs

@@ -0,0 +1,9 @@
+namespace OwnChar.Model
+{
+    public enum UserType
+    {
+        Guest,
+        User,
+        Admin
+    }
+}