Created AdminContext handling

src/HopFrame.Web.Admin/AdminPagesContext.cs

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+using HopFrame.Web.Admin.Generators;
+
+namespace HopFrame.Web.Admin;
+
+public abstract class AdminPagesContext {
+
+    public abstract void OnModelCreating(IAdminContextGenerator generator);
+
+}

src/HopFrame.Web.Admin/Attributes/AdminDescriptionAttribute.cs

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+namespace HopFrame.Web.Admin.Attributes;
+
+[AttributeUsage(AttributeTargets.Class | AttributeTargets.Property)]
+public class AdminDescriptionAttribute(string description) : Attribute {
+    public string Description { get; set; } = description;
+}

src/HopFrame.Web.Admin/Attributes/AdminNameAttribute.cs

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+namespace HopFrame.Web.Admin.Attributes;
+
+[AttributeUsage(AttributeTargets.Class | AttributeTargets.Property)]
+public class AdminNameAttribute(string name) : Attribute {
+    public string Name { get; set; } = name;
+}

src/HopFrame.Web.Admin/Attributes/Classes/AdminButtonConfigAttribute.cs

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+namespace HopFrame.Web.Admin.Attributes.Classes;
+
+[AttributeUsage(AttributeTargets.Class)]
+public class AdminButtonConfigAttribute(bool showCreateButton = true, bool showDeleteButton = true, bool showUpdateButton = true) : Attribute {
+    public bool ShowCreateButton { get; set; } = showCreateButton;
+    public bool ShowDeleteButton { get; set; } = showDeleteButton;
+    public bool ShowUpdateButton { get; set; } = showUpdateButton;
+}

src/HopFrame.Web.Admin/Attributes/Classes/AdminPermissionsAttribute.cs

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+using HopFrame.Web.Admin.Models;
+
+namespace HopFrame.Web.Admin.Attributes.Classes;
+
+[AttributeUsage(AttributeTargets.Class)]
+public class AdminPermissionsAttribute(AdminPagePermissions permissions) : Attribute {
+    public AdminPagePermissions Permissions { get; set; } = permissions;
+}

src/HopFrame.Web.Admin/Attributes/Members/AdminBoldAttribute.cs

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+namespace HopFrame.Web.Admin.Attributes.Members;
+
+[AttributeUsage(AttributeTargets.Property)]
+public class AdminBoldAttribute : Attribute;

src/HopFrame.Web.Admin/Attributes/Members/AdminHideValueAttribute.cs

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+namespace HopFrame.Web.Admin.Attributes.Members;
+
+[AttributeUsage(AttributeTargets.Property)]
+public class AdminHideValueAttribute : Attribute;

src/HopFrame.Web.Admin/Attributes/Members/AdminIgnoreAttribute.cs

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+namespace HopFrame.Web.Admin.Attributes.Members;
+
+[AttributeUsage(AttributeTargets.Property)]
+public class AdminIgnoreAttribute(bool onlyForListing = false) : Attribute {
+    public bool OnlyForListing { get; set; } = onlyForListing;
+}

src/HopFrame.Web.Admin/Attributes/Members/AdminUneditableAttribute.cs

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+namespace HopFrame.Web.Admin.Attributes.Members;
+
+[AttributeUsage(AttributeTargets.Property)]
+public class AdminUneditableAttribute : Attribute;

src/HopFrame.Web.Admin/Attributes/Members/AdminUnsortableAttribute.cs

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+namespace HopFrame.Web.Admin.Attributes.Members;
+
+[AttributeUsage(AttributeTargets.Property)]
+public class AdminUnsortableAttribute : Attribute;

src/HopFrame.Web.Admin/Generators/IAdminContextGenerator.cs

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+namespace HopFrame.Web.Admin.Generators;
+
+public interface IAdminContextGenerator {
+
+    IAdminPageGenerator<TModel> Page<TModel>();
+
+}

src/HopFrame.Web.Admin/Generators/IAdminPageGenerator.cs

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+using System.ComponentModel;
+using System.Linq.Expressions;
+
+namespace HopFrame.Web.Admin.Generators;
+
+public interface IAdminPageGenerator<TModel> {
+
+    IAdminPageGenerator<TModel> Title(string title);
+    IAdminPageGenerator<TModel> Description(string description);
+
+    IAdminPageGenerator<TModel> ViewPermission(string permission);
+    IAdminPageGenerator<TModel> CreatePermission(string permission);
+    IAdminPageGenerator<TModel> UpdatePermission(string permission);
+    IAdminPageGenerator<TModel> DeletePermission(string permission);
+
+    IAdminPageGenerator<TModel> ShowCreateButton(bool show);
+    IAdminPageGenerator<TModel> ShowDeleteButton(bool show);
+    IAdminPageGenerator<TModel> ShowUpdateButton(bool show);
+
+    IAdminPageGenerator<TModel> DefaultSort<TProperty>(Expression<Func<TModel, TProperty>> propertyExpression, ListSortDirection direction);
+
+    IAdminPageGenerator<TModel> ConfigureRepository<TRepository>() where TRepository : IModelRepository<TModel>;
+    
+    IAdminPropertyGenerator Property<TProperty>(Expression<Func<TModel, TProperty>> propertyExpression);
+
+}

src/HopFrame.Web.Admin/Generators/IAdminPropertyGenerator.cs

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+namespace HopFrame.Web.Admin.Generators;
+
+public interface IAdminPropertyGenerator {
+
+    IAdminPropertyGenerator Sortable(bool sortable);
+    IAdminPropertyGenerator Editable(bool editable);
+    IAdminPropertyGenerator DisplayValueWhileEditing(bool display);
+    IAdminPropertyGenerator DisplayInListing(bool display = true);
+    IAdminPropertyGenerator Bold(bool isBold = true);
+    
+    IAdminPropertyGenerator DisplayName(string displayName);
+    IAdminPropertyGenerator Description(string description);
+
+}

src/HopFrame.Web.Admin/Generators/IGenerator.cs

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+namespace HopFrame.Web.Admin.Generators;
+
+public interface IGenerator<out TGeneratedType> {
+
+    TGeneratedType Compile();
+
+}

src/HopFrame.Web.Admin/Generators/Implementation/AdminContextGenerator.cs

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+using System.Reflection;
+using HopFrame.Web.Admin.Attributes;
+using HopFrame.Web.Admin.Attributes.Classes;
+using HopFrame.Web.Admin.Models;
+
+namespace HopFrame.Web.Admin.Generators.Implementation;
+
+internal class AdminContextGenerator : IAdminContextGenerator {
+
+    private readonly IDictionary<Type, object> _adminPages = new Dictionary<Type, object>();
+
+    public IAdminPageGenerator<TModel> Page<TModel>() {
+        if (_adminPages.TryGetValue(typeof(TModel), out var pageGenerator))
+            return pageGenerator as IAdminPageGenerator<TModel>;
+
+        var generator = Activator.CreateInstance(typeof(IAdminPageGenerator<TModel>)) as IAdminPageGenerator<TModel>;
+        
+        ApplyConfigurationFromAttributes(generator, typeof(TModel).GetCustomAttributes(false));
+        
+        _adminPages.Add(typeof(TModel), generator);
+
+        return generator;
+    }
+
+    public AdminPage<TModel> CompilePage<TModel>() {
+        var generator = _adminPages[typeof(TModel)];
+        if (generator is null) return null;
+
+        return (generator as AdminPageGenerator<TModel>)?.Compile();
+    }
+
+    public TContext CompileContext<TContext>() where TContext : AdminPagesContext {
+        var type = typeof(TContext);
+        var compileMethod = typeof(AdminContextGenerator).GetMethod(nameof(CompilePage));
+        
+        var properties = type.GetProperties();
+
+        var context = Activator.CreateInstance<TContext>();
+        
+        foreach (var property in properties) {
+            var propertyType = property.PropertyType.GenericTypeArguments[0];
+            var pageGeneratorType = typeof(AdminPageGenerator<>).MakeGenericType(propertyType);
+            var generatorInstance = Activator.CreateInstance(pageGeneratorType, [propertyType.Name]);
+
+            var populatorMethod = typeof(AdminContextGenerator)
+                .GetMethod(nameof(ApplyConfigurationFromAttributes))?
+                .MakeGenericMethod(propertyType);
+            populatorMethod?.Invoke(this, [generatorInstance, propertyType.GetCustomAttributes()]);
+            
+            _adminPages.Add(propertyType, generatorInstance);
+        }
+        
+        context.OnModelCreating(this);
+        
+        foreach (var property in properties) {
+            var modelType = property.PropertyType.GenericTypeArguments[0];
+            var method = compileMethod?.MakeGenericMethod(modelType);
+            property.SetValue(context, method?.Invoke(this, []));
+        }
+
+        return context;
+    }
+
+    public void ApplyConfigurationFromAttributes<TModel>(IAdminPageGenerator<TModel> generator, object[] attributes) {
+        if (attributes.Any(a => a is AdminNameAttribute)) {
+            var attribute = attributes.Single(a => a is AdminNameAttribute) as AdminNameAttribute;
+            generator.Title(attribute?.Name);
+        }
+            
+        if (attributes.Any(a => a is AdminDescriptionAttribute)) {
+            var attribute = attributes.Single(a => a is AdminDescriptionAttribute) as AdminDescriptionAttribute;
+            generator.Description(attribute?.Description);
+        }
+
+        if (attributes.Any(a => a is AdminPermissionsAttribute)) {
+            var attribute = attributes.Single(a => a is AdminPermissionsAttribute) as AdminPermissionsAttribute;
+            generator.CreatePermission(attribute?.Permissions.Create);
+            generator.UpdatePermission(attribute?.Permissions.Update);
+            generator.ViewPermission(attribute?.Permissions.View);
+            generator.DeletePermission(attribute?.Permissions.Delete);
+        }
+
+        if (attributes.Any(a => a is AdminButtonConfigAttribute)) {
+            var attribute = attributes.Single(a => a is AdminButtonConfigAttribute) as AdminButtonConfigAttribute;
+            generator.ShowCreateButton(attribute?.ShowCreateButton == true);
+            generator.ShowUpdateButton(attribute?.ShowUpdateButton == true);
+            generator.ShowDeleteButton(attribute?.ShowDeleteButton == true);
+        }
+    }
+
+}

src/HopFrame.Web.Admin/Generators/Implementation/AdminPageGenerator.cs

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+using System.ComponentModel;
+using System.ComponentModel.DataAnnotations;
+using System.Linq.Expressions;
+using System.Reflection;
+using HopFrame.Web.Admin.Attributes;
+using HopFrame.Web.Admin.Attributes.Members;
+using HopFrame.Web.Admin.Models;
+
+namespace HopFrame.Web.Admin.Generators.Implementation;
+
+internal sealed class AdminPageGenerator<TModel> : IAdminPageGenerator<TModel>, IGenerator<AdminPage<TModel>> {
+
+    private readonly AdminPage<TModel> _page;
+    private readonly IDictionary<string, AdminPropertyGenerator> _propertyGenerators;
+
+    public AdminPageGenerator() {
+        _page = new AdminPage<TModel> {
+            Permissions = new AdminPagePermissions()
+        };
+        _propertyGenerators = new Dictionary<string, AdminPropertyGenerator>();
+
+        var type = typeof(TModel);
+        var properties = type.GetProperties();
+        
+        foreach (var property in properties) {
+            var attributes = property.GetCustomAttributes(false);
+            var ignoreProperty = attributes
+                .SingleOrDefault(a => a is AdminIgnoreAttribute) as AdminIgnoreAttribute;
+            if (ignoreProperty?.OnlyForListing == false) continue;
+            
+            var generator = Activator.CreateInstance(typeof(AdminPropertyGenerator), [property.Name, property.PropertyType]) as AdminPropertyGenerator;
+
+            ApplyConfigurationFromAttributes(generator, attributes, property);
+            
+            _propertyGenerators.Add(property.Name, generator);
+        }
+    }
+
+    public AdminPageGenerator(string title) : this() {
+        Title(title);
+    }
+
+    public IAdminPageGenerator<TModel> Title(string title) {
+        _page.Title = title;
+        return this;
+    }
+
+    public IAdminPageGenerator<TModel> Description(string description) {
+        _page.Description = description;
+        return this;
+    }
+
+    public IAdminPageGenerator<TModel> ViewPermission(string permission) {
+        _page.Permissions.View = permission;
+        return this;
+    }
+
+    public IAdminPageGenerator<TModel> CreatePermission(string permission) {
+        _page.Permissions.Create = permission;
+        return this;
+    }
+
+    public IAdminPageGenerator<TModel> UpdatePermission(string permission) {
+        _page.Permissions.Update = permission;
+        return this;
+    }
+
+    public IAdminPageGenerator<TModel> DeletePermission(string permission) {
+        _page.Permissions.Delete = permission;
+        return this;
+    }
+
+    public IAdminPageGenerator<TModel> ShowCreateButton(bool show) {
+        _page.ShowCreateButton = show;
+        return this;
+    }
+
+    public IAdminPageGenerator<TModel> ShowDeleteButton(bool show) {
+        _page.ShowDeleteButton = show;
+        return this;
+    }
+
+    public IAdminPageGenerator<TModel> ShowUpdateButton(bool show) {
+        _page.ShowUpdateButton = show;
+        return this;
+    }
+
+    public IAdminPageGenerator<TModel> DefaultSort<TProperty>(Expression<Func<TModel, TProperty>> propertyExpression, ListSortDirection direction) {
+        var property = GetPropertyInfo(propertyExpression);
+        
+        _page.DefaultSortPropertyName = property.Name;
+        _page.DefaultSortDirection = direction;
+        return this;
+    }
+
+    public IAdminPageGenerator<TModel> ConfigureRepository<TRepository>() where TRepository : IModelRepository<TModel> {
+        _page.RepositoryProvider = typeof(TRepository);
+        return this;
+    }
+
+    public IAdminPropertyGenerator Property<TProperty>(Expression<Func<TModel, TProperty>> propertyExpression) {
+        var property = GetPropertyInfo(propertyExpression);
+
+        if (_propertyGenerators.TryGetValue(property.Name, out var propertyGenerator))
+            return propertyGenerator;
+        
+        var generator = Activator.CreateInstance(typeof(AdminPropertyGenerator), new { property.Name, property.PropertyType }) as AdminPropertyGenerator;
+        ApplyConfigurationFromAttributes(generator, property.GetCustomAttributes(false), property);
+        _propertyGenerators.Add(property.Name, generator);
+        
+        return generator;
+    }
+
+    public AdminPage<TModel> Compile() {
+        var properties = new List<AdminPageProperty>();
+        
+        foreach (var generator in _propertyGenerators.Values){
+            properties.Add(generator.Compile());
+        }
+
+        _page.Properties = properties;
+        
+        return _page;
+    }
+
+    private void ApplyConfigurationFromAttributes(AdminPropertyGenerator generator, object[] attributes, PropertyInfo property) {
+        if (attributes.Any(a => a is KeyAttribute)) {
+            _page.DefaultSortPropertyName = property.Name;
+            generator.Bold();
+            generator.Editable(false);
+        }
+
+        if (attributes.Any(a => a is AdminUnsortableAttribute))
+            generator.Sortable(false);
+
+        if (attributes.Any(a => a is AdminUneditableAttribute))
+            generator.Editable(false);
+
+        if (attributes.Any(a => a is AdminBoldAttribute))
+            generator.Bold();
+        
+        if (attributes.Any(a => a is AdminIgnoreAttribute))
+            generator.DisplayInListing(false);
+
+        if (attributes.Any(a => a is AdminHideValueAttribute))
+            generator.DisplayValueWhileEditing(false);
+
+        if (attributes.Any(a => a is AdminNameAttribute)) {
+            var attribute = attributes.Single(a => a is AdminNameAttribute) as AdminNameAttribute;
+            generator.DisplayName(attribute?.Name);
+        }
+            
+        if (attributes.Any(a => a is AdminDescriptionAttribute)) {
+            var attribute = attributes.Single(a => a is AdminDescriptionAttribute) as AdminDescriptionAttribute;
+            generator.Description(attribute?.Description);
+        }
+    }
+
+    private static PropertyInfo GetPropertyInfo<TSource, TProperty>(Expression<Func<TSource, TProperty>> propertyLambda) {
+        if (propertyLambda.Body is not MemberExpression member) {
+            throw new ArgumentException($"Expression '{propertyLambda}' refers to a method, not a property.");
+        }
+
+        if (member.Member is not PropertyInfo propInfo) {
+            throw new ArgumentException($"Expression '{propertyLambda}' refers to a field, not a property.");
+        }
+
+        Type type = typeof(TSource);
+        if (propInfo.ReflectedType != null && type != propInfo.ReflectedType &&
+            !type.IsSubclassOf(propInfo.ReflectedType)) {
+            throw new ArgumentException($"Expression '{propertyLambda}' refers to a property that is not from type {type}.");
+        }
+        
+        if (propInfo.Name is null)
+            throw new ArgumentException($"Expression '{propertyLambda}' refers a not existing property.");
+
+        return propInfo;
+    }
+    
+}

src/HopFrame.Web.Admin/Generators/Implementation/AdminPropertyGenerator.cs

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+using HopFrame.Web.Admin.Models;
+
+namespace HopFrame.Web.Admin.Generators.Implementation;
+
+internal sealed class AdminPropertyGenerator(string name, Type type) : IAdminPropertyGenerator, IGenerator<AdminPageProperty> {
+    
+    private readonly AdminPageProperty _property = new() {
+        Name = name,
+        Type = type
+    };
+
+    public IAdminPropertyGenerator Sortable(bool sortable) {
+        _property.Sortable = sortable;
+        return this;
+    }
+
+    public IAdminPropertyGenerator Editable(bool editable) {
+        _property.Editable = editable;
+        return this;
+    }
+
+    public IAdminPropertyGenerator DisplayValueWhileEditing(bool display) {
+        _property.EditDisplayValue = display;
+        return this;
+    }
+
+    public IAdminPropertyGenerator DisplayInListing(bool display = true) {
+        _property.DisplayInListing = display;
+        return this;
+    }
+
+    public IAdminPropertyGenerator Bold(bool isBold = true) {
+        _property.Bold = isBold;
+        return this;
+    }
+
+    public IAdminPropertyGenerator DisplayName(string displayName) {
+        _property.DisplayName = displayName;
+        return this;
+    }
+
+    public IAdminPropertyGenerator Description(string description) {
+        _property.Description = description;
+        return this;
+    }
+
+    public AdminPageProperty Compile() {
+        _property.DisplayName ??= _property.Name;
+
+        return _property;
+    }
+}

src/HopFrame.Web.Admin/HopFrame.Web.Admin.csproj

@@ -0,0 +1,13 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <TargetFramework>net8.0</TargetFramework>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>disable</Nullable>
+    </PropertyGroup>
+
+    <ItemGroup>
+      <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="8.0.0" />
+    </ItemGroup>
+
+</Project>

src/HopFrame.Web.Admin/IModelRepository.cs

@@ -0,0 +1,8 @@
+namespace HopFrame.Web.Admin;
+
+public interface IModelRepository<TModel> {
+    Task<IEnumerable<TModel>> ReadAll();
+    Task<TModel> Create(TModel model);
+    Task<TModel> Update(TModel model);
+    Task Delete(TModel model);
+}

src/HopFrame.Web.Admin/Models/AdminPage.cs

@@ -0,0 +1,22 @@
+using System.ComponentModel;
+using System.Text.Json.Serialization;
+
+namespace HopFrame.Web.Admin.Models;
+
+public class AdminPage<TModel> : IAdminPageEntry {
+    public string Title { get; set; }
+    public string Description { get; set; }
+    public AdminPagePermissions Permissions { get; set; }
+    public IList<AdminPageProperty> Properties { get; set; }
+    [JsonIgnore]
+    public Type RepositoryProvider { get; set; }
+    
+    public string DefaultSortPropertyName { get; set; }
+    public ListSortDirection DefaultSortDirection { get; set; }
+
+    public bool ShowCreateButton { get; set; } = true;
+    public bool ShowDeleteButton { get; set; } = true;
+    public bool ShowUpdateButton { get; set; } = true;
+}
+
+public interface IAdminPageEntry;

src/HopFrame.Web.Admin/Models/AdminPagePermissions.cs

@@ -0,0 +1,8 @@
+namespace HopFrame.Web.Admin.Models;
+
+public class AdminPagePermissions {
+    public string View { get; set; }
+    public string Create { get; set; }
+    public string Update { get; set; }
+    public string Delete { get; set; }
+}

src/HopFrame.Web.Admin/Models/AdminPageProperty.cs

@@ -0,0 +1,17 @@
+using System.Text.Json.Serialization;
+
+namespace HopFrame.Web.Admin.Models;
+
+public class AdminPageProperty {
+    public string Name { get; set; }
+    public string DisplayName { get; set; }
+    public string Description { get; set; }
+
+    public bool DisplayInListing { get; set; } = true;
+    public bool Sortable { get; set; } = true;
+    public bool Editable { get; set; } = true;
+    public bool EditDisplayValue { get; set; } = true;
+    public bool Bold { get; set; }
+    [JsonIgnore]
+    public Type Type { get; set; }
+}

src/HopFrame.Web.Admin/ServiceCollectionExtensions.cs

@@ -0,0 +1,17 @@
+using HopFrame.Web.Admin.Generators.Implementation;
+using Microsoft.Extensions.DependencyInjection;
+
+namespace HopFrame.Web.Admin;
+
+public static class ServiceCollectionExtensions {
+
+    public static IServiceCollection AddAdminContext<TContext>(this IServiceCollection services) where TContext : AdminPagesContext {
+        services.AddSingleton(_ => {
+            var generator = new AdminContextGenerator();
+            return generator.CompileContext<TContext>();
+        });
+
+        return services;
+    }
+    
+}