implement some missing method content

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/IDataManager.cs

@@ -0,0 +1,20 @@
+using OwnChar.Model;
+
+namespace OwnChar.Data
+{
+    public interface IDataManager
+    {
+        // Login
+        abstract UserAccount? Login(string username, string password);
+        abstract bool Logout(UserAccount? account);
+
+        // User management
+        abstract UserAccount? CreateUserAccount(string username, string password);
+        abstract UserProfile? GetUserProfile(UserAccount account);
+        abstract bool DeleteUserAccount(UserAccount account);
+
+        // Group management
+        abstract UserProfile? GetOwner(Group group);
+        abstract IEnumerable<UserProfile>? GetMembers(Group group);
+    }
+}

OwnChar/Data/IDataProvider.cs

@@ -1,12 +1,29 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
+using OwnChar.Model;
 
 namespace OwnChar.Data
 {
     public interface IDataProvider
     {
+        // General
+        abstract bool IsInitialized();
+
+        // Model
+        abstract T? Create<T>() where T : class, IOwnCharObject;
+        abstract bool Save<T>(T obj) where T : class, IOwnCharObject;
+        abstract bool Delete<T>(T obj) where T : class, IOwnCharObject;
+
+        // Hierarchy
+        abstract bool SetParent(UserProfile profile, UserAccount parent);
+        abstract bool SetParent(Character character, Group parent);
+        abstract bool SetParent(Property property, Character character);
+        abstract bool SetOwner(Group group, UserProfile owner);
+        abstract bool SetOwner(Character group, UserProfile owner);
+
+        // Gets
+        abstract UserAccount? GetUserAccount(string username, string password);
+        abstract UserProfile? GetUserProfile(string username);
+        abstract IEnumerable<UserProfile>? GetGroupMembers(Group group);
+        abstract UserProfile? GetOwner(Group group);
+        abstract UserProfile? GetOwner(Character character);
     }
 }

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/Data/Managers/ClientDataManager.cs

@@ -0,0 +1,6 @@
+namespace OwnChar.Data.Managers
+{
+    public class ClientDataManager
+    {
+    }
+}

OwnChar/Data/Managers/DefaultDataManager.cs

@@ -0,0 +1,79 @@
+using OwnChar.Model;
+
+namespace OwnChar.Data.Managers
+{
+    public class DefaultDataManager(IDataProvider dataProvider) : IDataManager
+    {
+        private const string defaultUsername = "admin";
+        private const string defaultPassword = "admin";
+
+        public IDataProvider DataProvider { get; } = dataProvider;
+
+        public IEnumerable<UserProfile>? GetMembers(Group group)
+        {
+            return DataProvider.GetGroupMembers(group);
+        }
+
+        public UserProfile? GetOwner(Group group)
+        {
+            return DataProvider.GetOwner(group);
+        }
+
+        public UserProfile? GetUserProfile(UserAccount account)
+        {
+            ArgumentException.ThrowIfNullOrWhiteSpace(account.Username, nameof(account.Username));
+            return DataProvider.GetUserProfile(account.Username);
+        }
+
+        public UserAccount? Login(string username, string password)
+        {
+            return DataProvider.GetUserAccount(username, password);
+        }
+
+        public bool Logout(UserAccount? account)
+        {
+            return true;
+        }
+
+        public bool Initialize(bool force)
+        {
+            if (force || !DataProvider.IsInitialized())
+                return CreateUserAccount(defaultUsername, Utils.HashPassword(defaultUsername, defaultPassword)) != null;
+            return true;
+        }
+
+        public UserAccount? CreateUserAccount(string username, string password)
+        {
+            var account = DataProvider.Create<UserAccount>();
+            var profile = DataProvider.Create<UserProfile>();
+            var group = DataProvider.Create<Group>();
+
+            ArgumentNullException.ThrowIfNull(account, nameof(account));
+            ArgumentNullException.ThrowIfNull(profile, nameof(profile));
+            ArgumentNullException.ThrowIfNull(group, nameof(group));
+
+            account.Username = username;
+            account.Password = password;
+
+            profile.Name = username;
+            DataProvider.SetParent(profile, account);
+
+            group.IsInternal = true;
+            DataProvider.SetOwner(group, profile);
+
+            DataProvider.Save(account);
+            DataProvider.Save(profile);
+            DataProvider.Save(group);
+
+            return account;
+        }
+
+        public bool DeleteUserAccount(UserAccount account)
+        {
+            if (!string.IsNullOrWhiteSpace(account.Username) && DataProvider.GetUserProfile(account.Username) is UserProfile userProfile)
+                userProfile.Name = "Deleted user";
+            DataProvider.Delete(account);
+            return true;
+        }
+    }
+}

OwnChar/Data/Providers/JsonFile/JsonFile.cs

@@ -0,0 +1,12 @@
+using OwnChar.Data.Providers.JsonFile.Model;
+using OwnChar.Model;
+
+namespace OwnChar.Data.Providers.JsonFile
+{
+    public class JsonFile
+    {
+        public List<JsonUserAccount> UserAccounts { get; } = [];
+        public List<JsonCharacter> Characters { get; } = [];
+        public List<JsonGroup> Groups { get; } = [];
+    }
+}

OwnChar/Data/Providers/JsonFile/JsonFileDataProvider.cs

@@ -0,0 +1,221 @@
+using Newtonsoft.Json;
+using OwnChar.Data.Providers.JsonFile.Model;
+using OwnChar.Model;
+using System.Net.NetworkInformation;
+
+namespace OwnChar.Data.Providers.JsonFile
+{
+    public class JsonFileDataProvider : IDataProvider
+    {
+        public JsonFile JsonFile { get; protected set; }
+        public string JsonFilePath { 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.");
+        }
+
+        protected void LoadFile()
+        {
+            if (JsonConvert.DeserializeObject<JsonFile>(File.ReadAllText(JsonFilePath), CreateJsonSerializerSettings()) is JsonFile jsonFile)
+                JsonFile = jsonFile;
+            JsonFile ??= new();
+        }
+
+        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 T? Create<T>() where T : class, IOwnCharObject
+        {
+            var t = typeof(T);
+            IOwnCharObject? obj;
+
+            if (t == typeof(Property))
+                obj = new JsonProp();
+            else if (t == typeof(PropertyCategory))
+                obj = new JsonPropCat();
+            else if (t == typeof(Character))
+                obj = new JsonCharacter();
+            else if (t == typeof(Group))
+                obj = new JsonGroup();
+            else if (t == typeof(UserAccount))
+                obj = new JsonUserAccount();
+            else if (t == typeof(UserProfile))
+                obj = new JsonUserProfile();
+            else
+                obj = null;
+
+            return obj as T;
+        }
+
+        public bool Save<T>(T obj) where T : class, IOwnCharObject
+        {
+            if (obj is JsonCharacter character)
+            {
+                if (!JsonFile.Characters.Contains(character))
+                    JsonFile.Characters.Add(character);
+            }
+            else if (obj is JsonGroup group)
+            {
+                if (!JsonFile.Groups.Contains(group))
+                    JsonFile.Groups.Add(group);
+            }
+            else if(obj is JsonUserAccount account)
+            {
+                if (!JsonFile.UserAccounts.Contains(account))
+                    JsonFile.UserAccounts.Add(account);
+            }
+
+            return true;
+        }
+
+        public bool IsInitialized()
+        {
+            return JsonFile.UserAccounts.Count != 0;
+        }
+
+        public bool Delete<T>(T obj) where T : class, IOwnCharObject
+        {
+            if (obj is JsonCharacter character)
+            {
+                JsonFile.Groups.ForEach(n => n.Characters.Remove(character));
+                return true;
+            }
+            else if (obj is JsonProp prop)
+            {
+                JsonFile.Characters.ForEach(n => n.Properties.Remove(prop));
+                return true;
+            }
+            else if (obj is JsonPropCat propCat)
+            {
+                JsonFile.Characters.ForEach(n => n.Properties.ForEach(m =>
+                {
+                    if (m.Category == propCat)
+                        m.Category = null;
+                }));
+                JsonFile.Characters.ForEach(n => n.PropertyCategories.Remove(propCat));
+                return true;
+            }
+            else if (obj is JsonGroup group)
+            {
+                JsonFile.Groups.Remove(group);
+                return true;
+            }
+            else if (obj is JsonUserAccount account)
+            {
+                JsonFile.UserAccounts.Remove(account);
+                return true;
+            }
+            else if (obj is JsonUserProfile profile)
+            {
+                // We don't delete profiles at the moment!
+                profile.Name = "Deleted user";
+                return false;
+            }
+
+            return false;
+        }
+
+        public bool SetParent(UserProfile profile, UserAccount parent)
+        {
+            if (parent is JsonUserAccount jaccount && profile is JsonUserProfile jprofile)
+            {
+                jaccount.Profile = jprofile;
+                return true;
+            }
+            return false;
+        }
+
+        public bool SetParent(Character character, Group parent)
+        {
+            if (character is JsonCharacter jcharacter && parent is JsonGroup jgroup)
+            {
+                if (!jgroup.Characters.Contains(jcharacter))
+                    jgroup.Characters.Add(jcharacter);
+                return true;
+            }
+            return false;
+        }
+
+        public bool SetParent(Property property, Character character)
+        {
+            if (property is JsonProp jprop && character is JsonCharacter jcharacter)
+            {
+                if (!jcharacter.Properties.Contains(jprop))
+                    jcharacter.Properties.Add(jprop);
+                return true;
+            }
+            return false;
+        }
+
+        public bool SetOwner(Group group, UserProfile owner)
+        {
+            if (group is JsonGroup jgroup && owner is JsonUserProfile jprofile)
+            {
+                jgroup.Owner = jprofile;
+                return true;
+            }
+            return false;
+        }
+
+        public bool SetOwner(Character character, UserProfile owner)
+        {
+            if (character is JsonCharacter jcharacter && owner is JsonUserProfile jprofile)
+            {
+                jcharacter.Owner = jprofile;
+                return true;
+            }
+            return false;
+        }
+
+        public UserAccount? GetUserAccount(string username, string password)
+        {
+            ArgumentException.ThrowIfNullOrWhiteSpace(username, nameof(username));
+            ArgumentException.ThrowIfNullOrWhiteSpace(password, nameof(password));
+            return JsonFile.UserAccounts.FirstOrDefault(n => n.Username == username && n.Password == password);
+        }
+
+        public UserProfile? GetUserProfile(string username)
+        {
+            return JsonFile.UserAccounts.FirstOrDefault(n => n.Username == username)?.Profile;
+        }
+
+        public IEnumerable<UserProfile>? GetGroupMembers(Group group)
+        {
+            if (group is JsonGroup jgroup)
+                return jgroup.Members;
+            return null;
+        }
+
+        public UserProfile? GetOwner(Group group)
+        {
+            if (group is JsonGroup jgroup)
+                return jgroup.Owner;
+            return null;
+        }
+
+        public UserProfile? GetOwner(Character character)
+        {
+            if (character is JsonCharacter jcharacter)
+                return jcharacter.Owner;
+            return null;
+        }
+    }
+}

OwnChar/Data/Providers/JsonFile/Model/JsonCharacter.cs

@@ -0,0 +1,11 @@
+using OwnChar.Model;
+
+namespace OwnChar.Data.Providers.JsonFile.Model
+{
+    public class JsonCharacter : Character
+    {
+        public virtual JsonUserProfile? Owner { get; set; }
+        public virtual List<JsonProp> Properties { get; } = [];
+        public virtual List<JsonPropCat> PropertyCategories { get; } = [];
+    }
+}

OwnChar/Data/Providers/JsonFile/Model/JsonGroup.cs

@@ -0,0 +1,11 @@
+using OwnChar.Model;
+
+namespace OwnChar.Data.Providers.JsonFile.Model
+{
+    public class JsonGroup : Group
+    {
+        public virtual JsonUserProfile? Owner { get; set; }
+        public virtual List<JsonUserProfile> Members { get; } = [];
+        public virtual List<JsonCharacter> Characters { get; } = [];
+    }
+}

OwnChar/Data/Providers/JsonFile/Model/JsonProp.cs

@@ -0,0 +1,9 @@
+using OwnChar.Model;
+
+namespace OwnChar.Data.Providers.JsonFile.Model
+{
+    public class JsonProp : Property
+    {
+        public virtual JsonPropCat? Category { get; set; } = null;
+    }
+}

OwnChar/Data/Providers/JsonFile/Model/JsonPropCat.cs

@@ -0,0 +1,8 @@
+using OwnChar.Model;
+
+namespace OwnChar.Data.Providers.JsonFile.Model
+{
+    public class JsonPropCat : PropertyCategory
+    {
+    }
+}

OwnChar/Data/Providers/JsonFile/Model/JsonUserAccount.cs

@@ -0,0 +1,14 @@
+using Newtonsoft.Json;
+using Newtonsoft.Json.Converters;
+using OwnChar.Model;
+
+namespace OwnChar.Data.Providers.JsonFile.Model
+{
+    public class JsonUserAccount : UserAccount
+    {
+        public virtual JsonUserProfile? Profile { get; set; }
+
+        [JsonConverter(typeof(StringEnumConverter))]
+        public override UserType Type { get => base.Type; set => base.Type = value; }
+    }
+}

OwnChar/Data/Providers/JsonFile/Model/JsonUserProfile.cs

@@ -0,0 +1,8 @@
+using OwnChar.Model;
+
+namespace OwnChar.Data.Providers.JsonFile.Model
+{
+    public class JsonUserProfile : UserProfile
+    {
+    }
+}

OwnChar/Manager/CharacterManager.cs

@@ -1,54 +1,7 @@
-using OwnChar.Model;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace OwnChar.Manager
+namespace OwnChar.Manager
 {
     public class CharacterManager(OwnCharManager manager)
     {
         public OwnCharManager Manager { get; } = manager;
-
-        /// <summary>
-        /// Gets personal characters.
-        /// </summary>
-        /// <param name="group"></param>
-        /// <returns>Returns a collection with personal characters.</returns>
-        public IEnumerable<Character>? GetCharacters()
-        {
-            if (!IsLoggedIn || UserProfile == null)
-                return null;
-
-            return GetCharacters(UserProfile.Group);
-        }
-
-        /// <summary>
-        /// Gets all public ore accessable (e.g. via shares) characters from the specified group.
-        /// </summary>
-        /// <param name="group"></param>
-        /// <returns>Returns a collection with characters for the specified group.</returns>
-        public IEnumerable<Character> GetCharacters(Group group)
-        {
-        }
-
-        /// <summary>
-        /// Saves a character. If it doesn't exists, it will be created.
-        /// </summary>
-        /// <param name="character">The caracter to save.</param>
-        /// <returns><see cref="true"/> if success, otherwise <see cref="false"/>.</returns>
-        public bool SaveCharacter(Character character)
-        {
-        }
-
-        /// <summary>
-        /// Deletes a given character. If it doesn't exists, it will be ignored.
-        /// </summary>
-        /// <param name="character"></param>
-        /// <returns><see cref="true"/> if the given character has been deleted successfully or doesn't exist, otherwise <see cref="false"/>.</returns>
-        public bool DeleteCharacter(Character character)
-        {
-        }
     }
 }

OwnChar/Manager/Exceptions/LoginException.cs

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

OwnChar/Manager/GroupsManager.cs

@@ -1,9 +1,4 @@
 using OwnChar.Model;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 
 namespace OwnChar.Manager
 {
@@ -11,40 +6,16 @@ namespace OwnChar.Manager
     {
         public OwnCharManager Manager { get; } = manager;
 
-        public Group? GetGroup()
+        public UserProfile? GetOwner(Group? group)
         {
-            if (!IsLoggedIn || UserProfile == null)
-                return null;
-
-            // ...
+            ArgumentNullException.ThrowIfNull(group, nameof(group));
+            return Manager.DataManager?.GetOwner(group);
         }
 
-        public IEnumerable<Group>? GetGroups()
-        {
-            if (!IsLoggedIn || UserProfile == null)
-                return null;
-
-            return GetGroups(UserProfile);
-        }
-
-        public IEnumerable<Group>? GetGroups(UserProfile profile)
-        {
-            if (!IsLoggedIn)
-                return null;
-
-            // ...
-        }
-
-        public Group? CreateGroup(UserProfile owner)
-        {
-        }
-        
-        public bool SaveGroup(Group group)
-        {
-        }
-
-        public bool DeleteGroup(Group group)
+        public IEnumerable<UserProfile>? GetMembers(Group? group)
         {
+            ArgumentNullException.ThrowIfNull(group, nameof(group));
+            return Manager.DataManager?.GetMembers(group);
         }
     }
 }

OwnChar/Manager/OwnCharManager.cs

@@ -1,4 +1,5 @@
 using OwnChar.Data;
+using OwnChar.Manager.Exceptions;
 using OwnChar.Model;
 using Pilz.Cryptography;
 
@@ -7,32 +8,53 @@ namespace OwnChar.Manager
     public class OwnCharManager
     {
         // User
-        public bool IsLoggedIn { get; set; }
-        public UserAccount? CurrentUser { get; set; }
+        public bool IsLoggedIn => CurrentUser != null;
+        public UserAccount? CurrentUser { get; private set; }
 
         // Data Provider
-        public IDataProvider DataProvider { get; set; }
+        public IDataManager? DataManager { 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);
         }
 
+        internal protected 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(IDataManager? proxy, string? username, SecureString? password)
         {
-            return IsLoggedIn = true; // TODO: Change `true` to the real check.
+            ArgumentNullException.ThrowIfNull(proxy, nameof(proxy));
+            ArgumentException.ThrowIfNullOrWhiteSpace(username, nameof(username));
+            ArgumentException.ThrowIfNullOrWhiteSpace(password, nameof(password));
+
+            username = username.Trim().ToLower();
+            CurrentUser = proxy.Login(username, Utils.HashPassword(username, password));
+
+            return IsLoggedIn;
+        }
+
+        /// <summary>
+        /// Closes the session on the current data provider.
+        /// </summary>
+        /// <returns></returns>
+        public bool Logout()
+        {
+            return DataManager?.Logout(CurrentUser) ?? true;
         }
     }
 }

OwnChar/Manager/UserManager.cs

@@ -7,50 +7,24 @@ namespace OwnChar.Manager
     {
         public OwnCharManager Manager { get; } = manager;
 
-        public UserProfile? GetUserProfile(UserAccount account)
+        public UserProfile? GetOwnUserProfile()
         {
+            Manager.CheckLogin();
+            return Manager.DataManager!.GetUserProfile(Manager.CurrentUser!);
         }
 
-        public UserAccount? CreateAccount(string username, SecureString password, string email, string displayName)
+        public UserAccount? CreateUserAccount(string? username, SecureString? password)
         {
-            // Create account
-            // ...
-
-            // Create profile
-            // ...
+            ArgumentException.ThrowIfNullOrWhiteSpace(username, nameof(username));
+            ArgumentException.ThrowIfNullOrWhiteSpace(password, nameof(password));
+            username = username.Trim().ToLower();
+            return Manager.DataManager?.CreateUserAccount(username, Utils.HashPassword(username, password));
         }
-
-        /// <summary>
-        /// Saves the current logged in user account.
-        /// </summary>
-        /// <returns><see cref="true"/> if success, otherwise <see cref="false"/>.</returns>
-        public bool SaveAccount()
-        {
-        }
-
-        public bool DeleteAccount()
-        {
-        }
-
-        public UserProfile? CreateProfile()
-        {
-            // Create profile
-            // ...
-
-            // Create pre-defined group
-            // ...
-        }
-
-        /// <summary>
-        /// Saves the current logged in user profile.
-        /// </summary>
-        /// <returns><see cref="true"/> if success, otherwise <see cref="false"/>.</returns>
-        public bool SaveProfile()
-        {
-        }
-
-        public bool DeleteProfile()
+    
+        public bool DeleteUserAccount(UserAccount? account)
         {
+            ArgumentNullException.ThrowIfNull(account, nameof(account));
+            return Manager.DataManager?.DeleteUserAccount(account) ?? false;
         }
     }
 }

OwnChar/Model/Character.cs

@@ -1,11 +1,7 @@
 namespace OwnChar.Model
 {
-    public class Character(Group group, string name)
+    public abstract class Character : IOwnCharObject
     {
-        public ulong Id { get; set; }
-        public string Name { get; set; } = name;
-        public Group Group { get; set; } = group;
-        public List<Property> Properties { get; set; } = [];
-        public List<PropertyCategory> PropertyCategories { get; set; } = [];
+        public virtual string? Name { get; set; }
     }
 }

OwnChar/Model/Group.cs

@@ -1,15 +1,8 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace OwnChar.Model
+namespace OwnChar.Model
 {
-    public class Group(UserProfile owner)
+    public abstract class Group : IOwnCharObject
     {
-        public int Id { get; set; }
-        public UserProfile Owner { get; set; } = owner;
-        public List<UserProfile> Members { get; set; } = [];
+        public virtual string? Name {  get; set; }
+        public virtual bool IsInternal { get; set; }
     }
 }

OwnChar/Model/IOwnCharObject.cs

@@ -0,0 +1,6 @@
+namespace OwnChar.Model
+{
+    public interface IOwnCharObject
+    {
+    }
+}

OwnChar/Model/Property.cs

@@ -1,10 +1,8 @@
 namespace OwnChar.Model
 {
-    public class Property(string name)
+    public abstract class Property : IOwnCharObject
     {
-        public ulong Id { get; set; }
-        public string Name { get; set; } = name;
-        public PropertyCategory? Category { get; set; }
-        public object? Value { get; set; }
+        public virtual string? Name { get; set; }
+        public virtual object? Value { get; set; }
     }
 }

OwnChar/Model/PropertyCategory.cs

@@ -1,8 +1,7 @@
 namespace OwnChar.Model
 {
-    public class PropertyCategory(string name)
+    public abstract class PropertyCategory : IOwnCharObject
     {
-        public ulong Id { get; set; }
-        public string Name { get; set; } = name;
+        public virtual string? Name { get; set; }
     }
 }

OwnChar/Model/UserAccount.cs

@@ -1,17 +1,10 @@
 namespace OwnChar.Model
 {
-    public class UserAccount
+    public abstract class UserAccount : IOwnCharObject
     {
-        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 virtual string? Username { get; set; }
+        public virtual string? Password { get; set; }
+        public virtual string? Email { get; set; }
+        public virtual UserType Type { get; set; }
     }
 }

OwnChar/Model/UserProfile.cs

@@ -1,9 +1,7 @@
 namespace OwnChar.Model
 {
-    public class UserProfile(string name)
+    public abstract class UserProfile : IOwnCharObject
     {
-        public ulong Id { get; set; }
-        public string Name { get; set; } = name;
-        public UserAccount? Account { get; set; }
+        public virtual string? Name { get; set; }
     }
 }

OwnChar/Model/UserType.cs

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

OwnChar/OwnChar.csproj

@@ -10,4 +10,8 @@
     <PackageReference Include="Pilz.Cryptography" Version="2.0.1" />
   </ItemGroup>
 
+  <ItemGroup>
+    <Folder Include="Data\Providers\SqlDb\" />
+  </ItemGroup>
+
 </Project>

OwnChar/Utils.cs

@@ -0,0 +1,13 @@
+using Pilz.Cryptography;
+
+namespace OwnChar
+{
+    public static class Utils
+    {
+        public static string HashPassword(string username, SecureString password)
+        {
+            // TODO: Implement a good hasing algorythmus (like MD5) BEFORE going productive!
+            return (username + ":" + password).GetHashCode().ToString();
+        }
+    }
+}