completely rework IDataProvider

- make it more dynamic
- prevent incremental method count increase

OwnChar/Api/ICharacterManager.cs

@@ -6,6 +6,6 @@ public interface ICharacterManager
     Character? CreateCharacter(string? name);
     Character? CreateCharacter(string? name, Group? destination);
     bool DeleteCharacter(Character? character);
-    IEnumerable<Character>? GetCharacters(Group? group);
+    IQueryable<Character>? GetCharacters(Group? group);
-    IEnumerable<Character>? GetCharacters(UserProfile? profile);
+    IQueryable<Character>? GetCharacters(UserProfile? profile);
 }

OwnChar/Api/IDataManager.cs

@@ -1,33 +0,0 @@
-using OwnChar.Data;
-using OwnChar.Model;
-
-namespace OwnChar.Api;
-
-public interface IDataManager
-{
-    public delegate void OnActionEventHandler(object sender, OnActionEventArgs e);
-    public delegate void OnCallbackEventHandler(object sender, OnCallbackEventArgs e);
-
-    event OnActionEventHandler? OnAction;
-    event OnCallbackEventHandler? OnCallback;
-    // Login
-    UserAccount? Login(string username, string password);
-    bool Logout(UserAccount? account);
-
-    // Action
-    DataManagerActionResult ExecuteAction(DataManagerAction action, DataManagerActionType actionType, UserAccount currentUser, object? obj, params object?[] parameters);
-
-    //// User management
-    //UserProfile? GetUserProfile(UserAccount account);
-
-    //// Group management
-    //UserProfile? GetOwner(UserAccount account, Group group);
-    //IEnumerable<UserProfile>? GetMembers(UserAccount account, Group group);
-    //bool AddMember(UserAccount account, Group group, UserProfile user);
-    //bool RemoveMember(UserAccount account, Group group, UserProfile user);
-
-    //// Character management
-    //UserProfile? GetOwner(UserAccount account, Character group);
-    //IEnumerable<Character>? GetCharacters(UserAccount account, Group group);
-    //IEnumerable<Character>? GetCharacters(UserAccount account, UserProfile profile);
-}

OwnChar/Api/IDataProvider.cs

@@ -1,38 +0,0 @@
-using OwnChar.Model;
-
-namespace OwnChar.Api;
-
-public interface IDataProvider
-{
-    bool IsInitialized();
-    void SetInitialized();
-    bool SaveDatabase();
-
-    // Model
-    abstract T? Create<T>() where T : OwnCharObject;
-    abstract bool Save<T>(T obj) where T : OwnCharObject;
-    abstract bool Delete<T>(T obj) where T : OwnCharObject;
-    virtual IEnumerable<T>? Get<T>() where T : OwnCharObject => Get<T>(null);
-    abstract IEnumerable<T>? Get<T>(OwnCharObject? context) where T : OwnCharObject;
-
-    // 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);
-    abstract UserProfile? GetOwner(Group group);
-    abstract UserProfile? GetOwner(Character character);
-
-    // Collections
-    abstract bool AddMember(Group group, UserProfile user);
-    abstract bool RemoveMember(Group group, UserProfile user);
-
-    // Gets
-    abstract UserAccount? GetUserAccount(string username, string password);
-    abstract UserProfile? GetUserProfile(string username);
-    abstract IEnumerable<UserAccount>? GetUserAccounts();
-    abstract IEnumerable<UserProfile>? GetMembers(Group group);
-    abstract IEnumerable<Character>? GetCharacters(Group group);
-    abstract IEnumerable<Character>? GetCharacters(UserProfile jprofile);
-}

OwnChar/Api/IGroupsManager.cs

@@ -3,10 +3,12 @@
 namespace OwnChar.Api;
 public interface IGroupsManager
 {
+    IQueryable<Group>? GetGroups(UserProfile? profile);
+    IQueryable<Group>? GetGroups();
     bool AddMember(UserProfile? profile, Group? group);
     Group? CreateGroup(string? name);
     bool DeleteGroup(Group? group);
-    bool DeleteMember(UserProfile? profile, Group? group);
+    bool RemoveMember(UserProfile? profile, Group? group);
-    IEnumerable<UserProfile>? GetMembers(Group? group);
+    IQueryable<UserProfile>? GetMembers(Group? group);
     UserProfile? GetOwner(Group? group);
 }

OwnChar/Api/IOwnCharManager.cs

@@ -1,4 +1,5 @@
-using OwnChar.Model;
+using OwnChar.Data;
+using OwnChar.Model;
 using Pilz.Cryptography;
 
 namespace OwnChar.Api;

OwnChar/Api/IUserManager.cs

@@ -4,6 +4,7 @@ using Pilz.Cryptography;
 namespace OwnChar.Api;
 public interface IUserManager
 {
+    IQueryable<UserAccount>? GetUserAccounts();
     UserAccount? CreateUserAccount(string? username, SecureString? password);
     bool DeleteUserAccount(UserAccount? account);
     UserProfile? GetOwnUserProfile();

OwnChar/Data/DataManagerActions.cs

@@ -12,12 +12,14 @@ public static class DataManagerActions
         public static DataManagerAction UserAccount { get; } = new(Get, "useraccount");
         public static DataManagerAction Group { get; } = new(Get, "group");
         public static DataManagerAction Character { get; } = new(Get, "character");
+        public static DataManagerAction Property { get; } = new(Get, "property");
+        public static DataManagerAction PropertyCategory { get; } = new(Get, "propertycategory");
     }
 
     public static class Association
     {
         public static DataManagerAction Owner { get; } = new(Associate, "owner");
-        public static DataManagerAction Parent { get; } = new(Associate, "parent");
+        public static DataManagerAction Profile { get; } = new(Associate, "profile");
         public static DataManagerAction Members { get; } = new(Associate, "members");
     }
 }

OwnChar/Data/DataProviderSetAction.cs

@@ -0,0 +1,7 @@
+namespace OwnChar.Data;
+
+public enum DataProviderSetAction
+{
+    Set,
+    Remove,
+}

OwnChar/Data/HierarchyProperties.cs

@@ -0,0 +1,12 @@
+namespace OwnChar.Data;
+
+public static class HierarchyProperties
+{
+    public static string PropProps => "Props";
+    public static string PropPropCats => "PropCats";
+    public static string PropCharacters => "Characters";
+    public static string PropProfile => "Profile";
+    public static string PropOwner => "Owner";
+    public static string PropMembers => "Members";
+    public static string PropGroups => "Groups";
+}

OwnChar/Data/IDataManager.cs

@@ -0,0 +1,19 @@
+using OwnChar.Model;
+
+namespace OwnChar.Data;
+
+public interface IDataManager
+{
+    public delegate void OnActionEventHandler(object sender, OnActionEventArgs e);
+    public delegate void OnCallbackEventHandler(object sender, OnCallbackEventArgs e);
+
+    event OnActionEventHandler? OnAction;
+    event OnCallbackEventHandler? OnCallback;
+
+    // Login
+    UserAccount? Login(string username, string password);
+    bool Logout(UserAccount? account);
+
+    // Action
+    DataManagerActionResult ExecuteAction(DataManagerAction action, DataManagerActionType actionType, UserAccount currentUser, object? obj, params object?[] parameters);
+}

OwnChar/Data/IDataProvider.cs

@@ -0,0 +1,26 @@
+using OwnChar.Model;
+
+namespace OwnChar.Data;
+
+public interface IDataProvider
+{
+    bool IsInitialized();
+    void SetInitialized();
+    bool SaveDatabase();
+
+    // Model
+    T? Create<T>() where T : OwnCharObject;
+    bool Save<T>(T obj) where T : OwnCharObject;
+    bool Delete<T>(T obj) where T : OwnCharObject;
+    IQueryable<T>? GetAll<T>() where T : OwnCharObject;
+
+    // Hierarchy
+    bool SetChild(OwnCharObject parent, OwnCharObject? child, string property, DataProviderSetAction action);
+    T? GetChild<T>(OwnCharObject parent, string property) where T : OwnCharObject;
+    IQueryable<T>? GetChilds<T>(OwnCharObject parent, string property) where T : OwnCharObject;
+    T? GetParent<T>(OwnCharObject child, string property) where T : OwnCharObject;
+
+    // Explicite getters
+    UserAccount? GetUserAccount(string username, string password);
+    UserProfile? GetUserProfile(string username);
+}

OwnChar/Data/Managers/DefaultDataManager.cs

@@ -1,4 +1,4 @@
-using OwnChar.Api;
+using OwnChar.Manager.Modules;
 using OwnChar.Model;
 
 namespace OwnChar.Data.Managers;
@@ -50,14 +50,21 @@ public class DefaultDataManager : IDataManager
             // Get
             if (e.Is(DataManagerActionType.Get))
             {
-                if (e.Is(UserType.User) && e.GetObject(out Group? group))
+                if (e.Is(UserType.User))
-                    return e.SetResult(DataProvider.GetCharacters(group));
+                {
+                    if (e.GetObject(out Group? group))
+                        return e.SetResult(DataProvider.GetChilds<Character>(group, HierarchyProperties.PropCharacters));
+                    if (e.GetObject(out UserProfile? profile))
+                        return e.SetResult(DataProvider.GetChilds<Character>(profile, HierarchyProperties.PropCharacters));
+                }
+                if (e.Is(UserType.Admin))
+                    return e.SetResult(DataProvider.GetAll<Character>());
             }
 
             // Create
             else if (e.Is(DataManagerActionType.Set))
             {
-                if (e.Object is Group group && e.GetParam(0, out string? name))
+                if (e.GetObject(out Group? group) && e.GetParam(0, out string? name))
                     return e.SetResult(CreateCharacter(e.CurrentUser, name, group));
             }
         }
@@ -68,8 +75,13 @@ public class DefaultDataManager : IDataManager
             // Get
             if (e.Is(DataManagerActionType.Get))
             {
-                if (e.Object is UserProfile profile)
+                if (e.Is(UserType.User))
-                    return e.SetResult(DataProvider.GetGroups(profile));
+                {
+                    if (e.GetObject(out UserProfile? profile))
+                        return e.SetResult(DataProvider.GetChilds<Group>(profile, HierarchyProperties.PropGroups));
+                }
+                if (e.Is(UserType.Admin))
+                    return e.SetResult(DataProvider.GetAll<Group>());
             }
 
             // Create
@@ -87,7 +99,7 @@ public class DefaultDataManager : IDataManager
             if (e.Is(DataManagerActionType.Get))
             {
                 if (e.Is(UserType.Admin))
-                    return e.SetResult(DataProvider.GetUserAccounts());
+                    return e.SetResult(DataProvider.GetAll<UserAccount>());
             }
 
             // Create
@@ -96,11 +108,43 @@ public class DefaultDataManager : IDataManager
                 if (e.GetParam(0, out string? username) && e.GetParam(1, out string? password))
                     return e.SetResult(CreateUserAccount(username, password));
             }
+        }
+
+        // Property
+        else if (e.Is(DataManagerActions.Getter.Property))
+        {
+            // Get
+            if (e.Is(DataManagerActionType.Get))
+            {
+                if (e.Is(UserType.User) && e.GetObject(out Character? character))
+                    return e.SetResult(DataProvider.GetChilds<Property>(character, HierarchyProperties.PropPropCats));
+            }
 
             // Create
-            //else if (e.ActionType == DataManagerActionType.Set(
+            if (e.Is(DataManagerActionType.Set))
-            //    return e.SetResult(DataProvider.GetUserAccounts());
+            {
+                if (e.Is(UserType.User) && e.GetObject(out Character? character))
+                    return e.SetResult(CreateProperty(e.CurrentUser, character));
             }
+        }
+
+        //// PropertyCategory
+        //else if (e.Is(DataManagerActions.Getter.PropertyCategory))
+        //{
+        //    // Get
+        //    if (e.Is(DataManagerActionType.Get))
+        //    {
+        //        if (e.Is(UserType.User) && e.GetObject(out Character? character))
+        //            return e.SetResult(DataProvider.GetChilds<Property>(character, HierarchyProperties.PropPropCats));
+        //    }
+
+        //    // Create
+        //    if (e.Is(DataManagerActionType.Set))
+        //    {
+        //        if (e.Is(UserType.User) && e.GetObject(out Character? character))
+        //            return e.SetResult(CreateProperty(character));
+        //    }
+        //}
 
         return false;
     }
@@ -132,6 +176,13 @@ public class DefaultDataManager : IDataManager
         if (e.Object is UserAccount userAccount)
             return DeleteUserAccount(userAccount);
 
+        // Property
+        if (e.Object is Property property)
+        {
+            if (e.GetParam(0, out Character? paramChar))
+                return DeleteProperty(e.CurrentUser, paramChar, property);
+        }
+
         return false;
     }
 
@@ -140,31 +191,45 @@ public class DefaultDataManager : IDataManager
         if (!e.Is(DataManagerActions.Associate))
             return false;
 
-        if (e.Is(DataManagerActions.Association.Owner))
+        if (e.Is(DataManagerActions.Association.Profile))
         {
-            if (e.Object is Group group)
+            if (e.GetObject(out UserAccount? account))
             {
-                switch (e.ActionType)
+                if (e.Is(DataManagerActionType.Get))
                 {
-                    case DataManagerActionType.Get:
+                    if (e.Is(UserType.Admin) || (e.Is(UserType.User) && e.CurrentUser == account))
-                        return e.SetResultT(DataProvider.GetOwner(group));
+                        return e.SetResult(DataProvider.GetChild<UserProfile>(account, HierarchyProperties.PropProfile));
-                    case DataManagerActionType.Set:
+                }
-                        if (e.GetParam(0, out UserProfile? profile))
-                            return DataProvider.SetOwner(group, profile);
-                        break;
             }
         }
 
-            if (e.Object is Character character)
+        else if (e.Is(DataManagerActions.Association.Owner))
         {
-                switch (e.ActionType)
+            if (e.GetObject(out Group? group))
             {
-                    case DataManagerActionType.Get:
+                if (e.Is(DataManagerActionType.Get))
-                        return e.SetResultT(DataProvider.GetOwner(character));
+                {
-                    case DataManagerActionType.Set:
+                    if (e.Is(UserType.User))
-                        if (e.GetParam(0, out UserProfile? profile))
+                        return e.SetResultT(DataProvider.GetChild<UserProfile>(group, HierarchyProperties.PropOwner));
-                            return DataProvider.SetOwner(character, profile);
+                }
-                        break;
+                else if (e.Is(DataManagerActionType.Set))
+                {
+                    if (e.Is(UserType.User) && e.GetParam(0, out UserProfile? profile))
+                        return DataProvider.SetChild(group, profile, HierarchyProperties.PropOwner, DataProviderSetAction.Set);
+                }
+            }
+
+            if (e.GetObject(out Character? character))
+            {
+                if (e.Is(DataManagerActionType.Get))
+                {
+                    if (e.Is(UserType.User))
+                        return e.SetResultT(DataProvider.GetChild<UserProfile>(character, HierarchyProperties.PropOwner));
+                }
+                else if (e.Is(DataManagerActionType.Set))
+                {
+                    if (e.Is(UserType.User) && e.GetParam(0, out UserProfile? profile))
+                        return DataProvider.SetChild(character, profile, HierarchyProperties.PropOwner, DataProviderSetAction.Set);
                 }
             }
         }
@@ -176,21 +241,21 @@ public class DefaultDataManager : IDataManager
     {
         if (!account.HasPermission(UserType.Guest))
             return null;
-        return DataProvider.GetMembers(group);
+        return DataProvider.GetChilds<UserProfile>(group, HierarchyProperties.PropMembers);
     }
 
     public UserProfile? GetOwner(UserAccount account, Group group)
     {
         if (!account.HasPermission(UserType.Guest))
             return null;
-        return DataProvider.GetOwner(group);
+        return DataProvider.GetChild<UserProfile>(group, HierarchyProperties.PropOwner);
     }
 
     public UserProfile? GetOwner(UserAccount account, Character character)
     {
         if (!account.HasPermission(UserType.Guest))
             return null;
-        return DataProvider.GetOwner(character);
+        return DataProvider.GetChild<UserProfile>(character, HierarchyProperties.PropOwner);
     }
 
     public UserProfile? GetUserProfile(UserAccount account)
@@ -224,6 +289,28 @@ public class DefaultDataManager : IDataManager
         return result;
     }
 
+    protected virtual Property? CreateProperty(UserAccount account, Character character)
+    {
+        ArgumentNullException.ThrowIfNull(character, nameof(character));
+
+        if (!account.HasPermission(UserType.User))
+            return null;
+
+        var prop = DataProvider.Create<Property>();
+        ArgumentNullException.ThrowIfNull(prop, nameof(prop));
+
+        DataProvider.SetChild(character, prop, HierarchyProperties.PropProps, DataProviderSetAction.Set);
+
+        return prop;
+    }
+
+    protected virtual bool DeleteProperty(UserAccount account, Character character, Property property)
+    {
+        if (GetUserProfile(account) is not UserProfile profile || DataProvider.GetChild<UserProfile>(character, HierarchyProperties.PropOwner) is not UserProfile owner || !account.HasPermission(profile == owner ? UserType.User : UserType.Admin))
+            return false;
+        return DataProvider.Delete(property);
+    }
+
     protected virtual UserAccount? CreateUserAccount(string username, string password)
     {
         var account = DataProvider.Create<UserAccount>();
@@ -238,10 +325,10 @@ public class DefaultDataManager : IDataManager
         account.Password = password;
 
         profile.Name = username;
-        DataProvider.SetParent(profile, account);
+        DataProvider.SetChild(account, profile, HierarchyProperties.PropProfile, DataProviderSetAction.Set);
 
         group.IsInternal = true;
-        DataProvider.SetOwner(group, profile);
+        DataProvider.SetChild(group, profile, HierarchyProperties.PropOwner, DataProviderSetAction.Set);
 
         DataProvider.Save(account);
         DataProvider.Save(profile);
@@ -258,34 +345,6 @@ public class DefaultDataManager : IDataManager
         return true;
     }
 
-    public IEnumerable<Character>? GetCharacters(UserAccount account, Group group)
-    {
-        if (!account.HasPermission(UserType.Guest))
-            return null;
-        return DataProvider.GetCharacters(group);
-    }
-
-    public IEnumerable<Character>? GetCharacters(UserAccount account, UserProfile profile)
-    {
-        if (!account.HasPermission(UserType.Guest))
-            return null;
-        return DataProvider.GetCharacters(profile);
-    }
-
-    public bool AddMember(UserAccount account, Group group, UserProfile user)
-    {
-        if (GetUserProfile(account) is not UserProfile profile || DataProvider.GetOwner(group) is not UserProfile owner || !account.HasPermission(profile == owner ? UserType.User : UserType.Admin))
-            return false;
-        return DataProvider.AddMember(group, user);
-    }
-
-    public bool RemoveMember(UserAccount account, Group group, UserProfile user)
-    {
-        if (GetUserProfile(account) is not UserProfile profile || DataProvider.GetOwner(group) is not UserProfile owner || !account.HasPermission(profile == owner ? UserType.User : UserType.Admin))
-            return false;
-        return DataProvider.RemoveMember(group, user);
-    }
-
     protected virtual Group? CreateGroup(UserAccount account, string name)
     {
         if (!account.HasPermission(UserType.User) || GetUserProfile(account) is not UserProfile profile || DataProvider.Create<Group>() is not Group group)
@@ -295,14 +354,14 @@ public class DefaultDataManager : IDataManager
 
         DataProvider.Save(group);
 
-        DataProvider.SetOwner(group, profile);
+        DataProvider.SetChild(group, profile, HierarchyProperties.PropOwner, DataProviderSetAction.Set);
 
         return group;
     }
 
     protected virtual bool DeleteGroup(UserAccount account, Group group)
     {
-        if (GetUserProfile(account) is not UserProfile profile || DataProvider.GetOwner(group) is not UserProfile owner || !account.HasPermission(profile == owner ? UserType.User : UserType.Admin))
+        if (GetUserProfile(account) is not UserProfile profile || DataProvider.GetChild<UserProfile>(group, HierarchyProperties.PropOwner) is not UserProfile owner || !account.HasPermission(profile == owner ? UserType.User : UserType.Admin))
             return false;
         return DataProvider.Delete(group);
     }
@@ -316,21 +375,18 @@ public class DefaultDataManager : IDataManager
 
         DataProvider.Save(character);
 
-        DataProvider.SetOwner(character, profile);
+        DataProvider.SetChild(character, profile, HierarchyProperties.PropOwner, DataProviderSetAction.Set);
 
         if (group != null)
-            DataProvider.SetParent(character, group);
+            DataProvider.SetChild(group, character, HierarchyProperties.PropCharacters, DataProviderSetAction.Set);
 
         return character;
     }
 
     protected virtual bool DeleteCharacter(UserAccount account, Character character)
     {
-        if (GetUserProfile(account) is not UserProfile profile || DataProvider.GetOwner(character) is not UserProfile owner || !account.HasPermission(profile == owner ? UserType.User : UserType.Admin))
+        if (GetUserProfile(account) is not UserProfile profile || DataProvider.GetChild<UserProfile>(character, HierarchyProperties.PropOwner) is not UserProfile owner || !account.HasPermission(profile == owner ? UserType.User : UserType.Admin))
             return false;
-
+        return DataProvider.Delete(character);
-        DataProvider.Delete(character);
-
-        return true;
     }
 }

OwnChar/Data/Providers/JsonFile/JsonFileDataProvider.cs

@@ -1,13 +1,15 @@
 using Newtonsoft.Json;
-using OwnChar.Api;
 using OwnChar.Data.Providers.JsonFile.Model;
 using OwnChar.Model;
 using System.Collections;
+using System.Linq;
 
 namespace OwnChar.Data.Providers.JsonFile;
 
 public class JsonFileDataProvider : IDataProvider
 {
+    protected readonly Random random = new();
+
     public JsonFile JsonFile { get; protected set; }
     public string JsonFilePath { get; protected set; }
 
@@ -33,6 +35,11 @@ public class JsonFileDataProvider : IDataProvider
         File.WriteAllText(JsonFilePath, JsonConvert.SerializeObject(JsonFile, CreateJsonSerializerSettings()));
     }
 
+    protected int GenerateNewObjectId()
+    {
+        return random.Next();
+    }
+
     protected virtual JsonSerializerSettings CreateJsonSerializerSettings()
     {
         return new JsonSerializerSettings
@@ -54,6 +61,12 @@ public class JsonFileDataProvider : IDataProvider
         JsonFile.IsInitialized = true;
     }
 
+    public bool SaveDatabase()
+    {
+        SaveFile();
+        return true;
+    }
+
     public T? Create<T>() where T : OwnCharObject
     {
         var t = typeof(T);
@@ -74,7 +87,13 @@ public class JsonFileDataProvider : IDataProvider
         else
             obj = null;
 
-        return obj as T;
+        if (obj is T objT)
+        {
+            objT.Id = GenerateNewObjectId();
+            return objT;
+        }
+
+        return null;
     }
 
     public bool Save<T>(T obj) where T : OwnCharObject
@@ -140,89 +159,261 @@ public class JsonFileDataProvider : IDataProvider
         return false;
     }
 
-    public IEnumerable<T>? Get<T>(OwnCharObject? context) where T : OwnCharObject
+    public IQueryable<T>? GetAll<T>(OwnCharObject? context) where T : OwnCharObject
     {
         var t = typeof(T);
 
-        static IEnumerable<T>? asList(IList list) => list as IEnumerable<T>;
+        static IQueryable<T>? asList(IEnumerable list) => list as IQueryable<T>;
 
-        if (t == typeof(Property))
+        if (t == typeof(Character))
-        {
+            return asList(JsonFile.Characters);
-            // ...
-        }
-        else if (t == typeof(PropertyCategory))
-        {
-            // ...
-        }
-        else if (t == typeof(Character))
-        {
-            if (context is JsonGroup group)
-                return (IEnumerable<T>)group.Characters;
-            if (context is UserProfile profile)
-                return (IEnumerable<T>)JsonFile.Characters.Where(n => n.Owner == profile);
-            return (IEnumerable<T>)JsonFile.Characters;
-        }
         else if (t == typeof(Group))
-        {
+            return asList(JsonFile.Groups);
-            if (context is UserProfile profile)
-                return (IEnumerable<T>)JsonFile.Groups.Where(g => g.Owner == profile);
-            return (IEnumerable<T>)JsonFile.Groups;
-        }
         else if (t == typeof(UserAccount))
-            return (IEnumerable<T>)JsonFile.UserAccounts;
+            return asList(JsonFile.UserAccounts);
+
         return null;
     }
 
-    public bool SetParent(UserProfile profile, UserAccount parent)
+    public bool SetChild(OwnCharObject parent, OwnCharObject? child, string property, DataProviderSetAction action)
     {
-        if (parent is JsonUserAccount jaccount && profile is JsonUserProfile jprofile)
+        // UserAccount
+        if (parent is JsonUserAccount parentAccount)
         {
-            jaccount.Profile = jprofile;
+            // User profil
+            if (property == HierarchyProperties.PropProfile)
+            {
+                // Remove
+                if (child is null || action == DataProviderSetAction.Remove)
+                {
+                    parentAccount.Profile = null;
                     return true;
                 }
+
+                // Set
+                else if (child is JsonUserProfile childProfile)
+                {
+                    parentAccount.Profile = childProfile;
+                    return true;
+                }
+            }
+        }
+
+        // Group
+        if (parent is JsonGroup parentGroup)
+        {
+            // Characters
+            if (property == HierarchyProperties.PropCharacters)
+            {
+                // Clear
+                if (child is null && action == DataProviderSetAction.Remove)
+                {
+                    parentGroup.Characters.Clear();
+                    return true;
+                }
+
+                // Add/Remove
+                else if (child is JsonCharacter childCharacter)
+                {
+                    // Remove
+                    if (action == DataProviderSetAction.Remove)
+                    {
+                        parentGroup.Characters.Remove(childCharacter);
+                        return true;
+                    }
+
+                    // Add
+                    else
+                    {
+                        if (!parentGroup.Characters.Contains(childCharacter))
+                            parentGroup.Characters.Add(childCharacter);
+                        return true;
+                    }
+                }
+            }
+
+            // Members
+            // ...
+
+            // Owner
+            if (property == HierarchyProperties.PropOwner)
+            {
+                // Remove
+                if (child is null || action == DataProviderSetAction.Remove)
+                {
+                    parentGroup.Owner = null;
+                    return true;
+                }
+
+                // Set
+                else if (child is JsonUserProfile childProfile)
+                {
+                    parentGroup.Owner = childProfile;
+                    return true;
+                }
+            }
+        }
+
+        // Character
+        if (parent is JsonCharacter parentCharacter)
+        {
+            // Properties
+            if (property == HierarchyProperties.PropProps)
+            {
+                // Clear
+                if (child is null && action == DataProviderSetAction.Remove)
+                {
+                    parentCharacter.Properties.Clear();
+                    return true;
+                }
+
+                // Add/Remove
+                else if (child is JsonProp childProperty)
+                {
+                    // Remove
+                    if (action == DataProviderSetAction.Remove)
+                    {
+                        parentCharacter.Properties.Remove(childProperty);
+                        return true;
+                    }
+
+                    // Add
+                    else
+                    {
+                        if (!parentCharacter.Properties.Contains(childProperty))
+                            parentCharacter.Properties.Add(childProperty);
+                        return true;
+                    }
+                }
+            }
+
+            // Property categories
+            else if (property == HierarchyProperties.PropPropCats)
+            {
+                // Clear
+                if (child is null && action == DataProviderSetAction.Remove)
+                {
+                    parentCharacter.PropertyCategories.Clear();
+                    return true;
+                }
+
+                // Add/Remove
+                else if (child is JsonPropCat childPropertyCategory)
+                {
+                    // Remove
+                    if (action == DataProviderSetAction.Remove)
+                    {
+                        parentCharacter.PropertyCategories.Remove(childPropertyCategory);
+                        return true;
+                    }
+
+                    // Add
+                    else
+                    {
+                        if (!parentCharacter.PropertyCategories.Contains(childPropertyCategory))
+                            parentCharacter.PropertyCategories.Add(childPropertyCategory);
+                        return true;
+                    }
+                }
+            }
+
+            // Owner
+            else if (property == HierarchyProperties.PropOwner)
+            {
+                // Remove
+                if (child is null || action == DataProviderSetAction.Remove)
+                {
+                    parentCharacter.Owner = null;
+                    return true;
+                }
+
+                // Set
+                else if (child is JsonUserProfile childProfile)
+                {
+                    parentCharacter.Owner = childProfile;
+                    return true;
+                }
+            }
+        }
+
         return false;
     }
 
-    public bool SetParent(Character character, Group parent)
+    public T? GetParent<T>(OwnCharObject child, string property) where T : OwnCharObject
     {
-        if (character is JsonCharacter jcharacter && parent is JsonGroup jgroup)
+        throw new NotImplementedException("Not yet implemented as not needed.");
-        {
-            if (!jgroup.Characters.Contains(jcharacter))
-                jgroup.Characters.Add(jcharacter);
-            return true;
-        }
-        return false;
     }
 
-    public bool SetParent(Property property, Character character)
+    public T? GetChild<T>(OwnCharObject parent, string property) where T : OwnCharObject
     {
-        if (property is JsonProp jprop && character is JsonCharacter jcharacter)
+        // UserAccount
+        if (parent is JsonUserAccount parentAccount)
         {
-            if (!jcharacter.Properties.Contains(jprop))
+            // User profile
-                jcharacter.Properties.Add(jprop);
+            if (property == HierarchyProperties.PropProfile)
-            return true;
+                return parentAccount.Profile as T;
-        }
-        return false;
         }
 
-    public bool SetOwner(Group group, UserProfile owner)
+        // Group
+        else if (parent is JsonGroup parentGroup)
         {
-        if (group is JsonGroup jgroup && owner is JsonUserProfile jprofile)
+            // Owner
-        {
+            if (property == HierarchyProperties.PropCharacters)
-            jgroup.Owner = jprofile;
+                return parentGroup.Owner as T;
-            return true;
-        }
-        return false;
         }
 
-    public bool SetOwner(Character character, UserProfile owner)
+        // Character
+        else if (parent is JsonCharacter parentCharacter)
         {
-        if (character is JsonCharacter jcharacter && owner is JsonUserProfile jprofile)
+            // Owner
-        {
+            if (property == HierarchyProperties.PropOwner)
-            jcharacter.Owner = jprofile;
+                return parentCharacter.Owner as T;
-            return true;
         }
-        return false;
+
+        return null;
+    }
+
+    public IQueryable<T>? GetChilds<T>(OwnCharObject parent, string property) where T : OwnCharObject
+    {
+        static IQueryable<T>? asList(IEnumerable list) => list as IQueryable<T>;
+
+        // Group
+        if (parent is JsonGroup parentGroup)
+        {
+            // Characters
+            if (property == HierarchyProperties.PropCharacters)
+                return asList(parentGroup.Characters);
+
+            // Members
+            if (property == HierarchyProperties.PropMembers)
+                return asList(parentGroup.Members);
+        }
+
+        // Character
+        else if (parent is JsonCharacter parentCharacter)
+        {
+            // Properties
+            if (property == HierarchyProperties.PropProps)
+                return asList(parentCharacter.Properties);
+
+            // Property categories
+            if (property == HierarchyProperties.PropPropCats)
+                return asList(parentCharacter.PropertyCategories);
+        }
+
+        // UserProfile
+        else if (parent is JsonUserProfile parentUserProfile)
+        {
+            // Characters
+            if (property == HierarchyProperties.PropCharacters)
+                return asList(JsonFile.Characters.Where(c => c.Owner == parentUserProfile));
+
+            // Groups
+            if (property == HierarchyProperties.PropGroups)
+                return asList(JsonFile.Groups.Where(g => g.Owner == parentUserProfile));
+        }
+
+        return null;
     }
 
     public UserAccount? GetUserAccount(string username, string password)
@@ -236,66 +427,4 @@ public class JsonFileDataProvider : IDataProvider
     {
         return JsonFile.UserAccounts.FirstOrDefault(n => n.Username == username)?.Profile;
     }
-
-    public IEnumerable<UserProfile>? GetMembers(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;
-    }
-
-    public IEnumerable<Character>? GetCharacters(Group group)
-    {
-        if (group is JsonGroup jgroup)
-            return jgroup.Characters;
-        return null;
-    }
-
-    public IEnumerable<Character>? GetCharacters(UserProfile profile)
-    {
-        if (profile is UserProfile jprofile)
-            return JsonFile.Characters.Where(n => n.Owner == profile);
-        return null;
-    }
-
-    public bool AddMember(Group group, UserProfile user)
-    {
-        if (group is JsonGroup jgroup && user is JsonUserProfile jprofile)
-        {
-            if (!jgroup.Members.Contains(jprofile))
-                jgroup.Members.Add(jprofile);
-            return true;
-        }
-        return false;
-    }
-
-    public bool RemoveMember(Group group, UserProfile user)
-    {
-        if (group is JsonGroup jgroup && user is JsonUserProfile jprofile)
-        {
-            jgroup.Members.Remove(jprofile);
-            return true;
-        }
-        return false;
-    }
-
-    public bool SaveDatabase()
-    {
-        SaveFile();
-        return true;
-    }
 }

OwnChar/Manager/Modules/CharacterManager.cs

@@ -1,26 +1,27 @@
 using OwnChar.Api;
+using OwnChar.Data;
 using OwnChar.Model;
 
 namespace OwnChar.Manager.Modules;
 
 public class CharacterManager(OwnCharManager manager) : OwnCharManagerModule(manager), ICharacterManager
 {
-    public IEnumerable<Character>? GetCharacters(Group? group)
+    public IQueryable<Character>? GetCharacters(Group? group)
     {
         Manager.CheckLogin();
 
         if (group != null)
-            return Manager.DataManager?.GetCharacters(Manager.CurrentUser!, group);
+            return Manager.DataManager.ExecuteAction(DataManagerActions.Getter.Character, DataManagerActionType.Get, Manager.CurrentUser, group).Result as IQueryable<Character>;
 
         return null;
     }
 
-    public IEnumerable<Character>? GetCharacters(UserProfile? profile)
+    public IQueryable<Character>? GetCharacters(UserProfile? profile)
     {
         Manager.CheckLogin();
 
         if (profile != null)
-            return Manager.DataManager?.GetCharacters(Manager.CurrentUser!, profile);
+            return Manager.DataManager.ExecuteAction(DataManagerActions.Getter.Character, DataManagerActionType.Get, Manager.CurrentUser, profile).Result as IQueryable<Character>;
 
         return null;
     }
@@ -33,18 +34,14 @@ public class CharacterManager(OwnCharManager manager) : OwnCharManagerModule(man
     public Character? CreateCharacter(string? name, Group? destination)
     {
         ArgumentException.ThrowIfNullOrWhiteSpace(name, nameof(name));
-
         Manager.CheckLogin();
-
+        return Manager.DataManager.ExecuteAction(DataManagerActions.Getter.PropertyCategory, DataManagerActionType.Set, Manager.CurrentUser, null, name, destination).Result as Character;
-        return Manager.DataManager?.CreateCharacter(Manager.CurrentUser!, name, destination);
     }
 
     public bool DeleteCharacter(Character? character)
     {
         ArgumentNullException.ThrowIfNull(character, nameof(character));
-
         Manager.CheckLogin();
-
+        return Manager.DataManager.ExecuteAction(DataManagerActions.Delete, DataManagerActionType.Default, Manager.CurrentUser, character).HasSuccess;
-        return Manager.DataManager?.DeleteCharacter(Manager.CurrentUser!, character) ?? false;
     }
 }

OwnChar/Manager/Modules/GroupsManager.cs

@@ -10,14 +10,27 @@ public class GroupsManager(OwnCharManager manager) : OwnCharManagerModule(manage
     {
         ArgumentNullException.ThrowIfNull(group, nameof(group));
         Manager.CheckLogin();
-        return Manager.DataManager.ExecuteAction(DataManagerActions.Association.Members, DataManagerActionType.Get, Manager.CurrentUser, group).HasSuccess;
+        return Manager.DataManager.ExecuteAction(DataManagerActions.Association.Owner, DataManagerActionType.Get, Manager.CurrentUser, group).Result as UserProfile;
     }
 
-    public IEnumerable<UserProfile>? GetMembers(Group? group)
+    public IQueryable<Group>? GetGroups(UserProfile? profile)
+    {
+        ArgumentNullException.ThrowIfNull(profile, nameof(profile));
+        Manager.CheckLogin();
+        return Manager.DataManager.ExecuteAction(DataManagerActions.Getter.Group, DataManagerActionType.Get, Manager.CurrentUser, profile) as IQueryable<Group>;
+    }
+
+    public IQueryable<Group>? GetGroups()
+    {
+        Manager.CheckLogin();
+        return Manager.DataManager.ExecuteAction(DataManagerActions.Getter.Group, DataManagerActionType.Get, Manager.CurrentUser, null) as IQueryable<Group>;
+    }
+
+    public IQueryable<UserProfile>? GetMembers(Group? group)
     {
         ArgumentNullException.ThrowIfNull(group, nameof(group));
         Manager.CheckLogin();
-        return Manager.DataManager.ExecuteAction(DataManagerActions.Association.Members, DataManagerActionType.Get, Manager.CurrentUser, group).HasSuccess;
+        return Manager.DataManager.ExecuteAction(DataManagerActions.Association.Members, DataManagerActionType.Get, Manager.CurrentUser, group).Result as IQueryable<UserProfile>;
     }
 
     public bool AddMember(UserProfile? profile, Group? group)
@@ -28,7 +41,7 @@ public class GroupsManager(OwnCharManager manager) : OwnCharManagerModule(manage
         return Manager.DataManager.ExecuteAction(DataManagerActions.Association.Members, DataManagerActionType.Set, Manager.CurrentUser, group, profile).HasSuccess;
     }
 
-    public bool DeleteMember(UserProfile? profile, Group? group)
+    public bool RemoveMember(UserProfile? profile, Group? group)
     {
         ArgumentNullException.ThrowIfNull(profile, nameof(profile));
         ArgumentNullException.ThrowIfNull(group, nameof(group));

OwnChar/Manager/Modules/UserManager.cs

@@ -1,4 +1,5 @@
 using OwnChar.Api;
+using OwnChar.Data;
 using OwnChar.Model;
 using Pilz.Cryptography;
 
@@ -9,20 +10,28 @@ public class UserManager(OwnCharManager manager) : OwnCharManagerModule(manager)
     public UserProfile? GetOwnUserProfile()
     {
         Manager.CheckLogin();
-        return Manager.DataManager!.GetUserProfile(Manager.CurrentUser!);
+        return Manager.DataManager.ExecuteAction(DataManagerActions.Association.Profile, DataManagerActionType.Get, Manager.CurrentUser, Manager.CurrentUser).Result as UserProfile;
+    }
+
+    public IQueryable<UserAccount>? GetUserAccounts()
+    {
+        Manager.CheckLogin();
+        return Manager.DataManager.ExecuteAction(DataManagerActions.Getter.UserAccount, DataManagerActionType.Get, Manager.CurrentUser, null).Result as IQueryable<UserAccount>;
     }
 
     public UserAccount? CreateUserAccount(string? username, SecureString? password)
     {
         ArgumentException.ThrowIfNullOrWhiteSpace(username, nameof(username));
         ArgumentException.ThrowIfNullOrWhiteSpace(password, nameof(password));
+        Manager.CheckLogin();
         username = username.Trim().ToLower();
-        return Manager.DataManager?.CreateUserAccount(username, Utils.HashPassword(username, password));
+        return Manager.DataManager.ExecuteAction(DataManagerActions.Getter.UserAccount, DataManagerActionType.Set, Manager.CurrentUser, null, username, Utils.HashPassword(username, password)).Result as UserAccount;
     }
 
     public bool DeleteUserAccount(UserAccount? account)
     {
         ArgumentNullException.ThrowIfNull(account, nameof(account));
-        return Manager.DataManager?.DeleteUserAccount(account) ?? false;
+        Manager.CheckLogin();
+        return Manager.DataManager.ExecuteAction(DataManagerActions.Delete, DataManagerActionType.Default, Manager.CurrentUser, account).HasSuccess;
     }
 }

OwnChar/Manager/OwnCharManager.cs

@@ -1,5 +1,6 @@
 using OwnChar.Api;
 using OwnChar.Api.Exceptions;
+using OwnChar.Data;
 using OwnChar.Manager.Modules;
 using OwnChar.Model;
 using Pilz.Cryptography;