Added a view small helpers.

Author: Felix-CodingClimber

src/DotNetElements.AppFramework.Abstractions/Entity/EntityBase.cs

@@ -9,6 +9,8 @@ public abstract class Entity<TKey> : Entity, IEntity<TKey>
 {
     public TKey Id { get; protected set; } = default!;
 
+    public bool WithId(TKey id) => Id.Equals(id);
+
     internal void SetId(TKey id)
     {
         // todo check if this is needed

src/DotNetElements.AppFramework.Abstractions/Entity/EntityHelper.cs

@@ -1,4 +1,5 @@
 using System.Runtime.CompilerServices;
+using DotNetElements.AppFramework.Abstractions.Model;
 
 namespace DotNetElements.AppFramework.Abstractions.Entity;
 
@@ -61,7 +62,8 @@ public static void UpdateRelatedEntities<TEntity, TKey>(List<TEntity> oldCollect
         where TKey : notnull, IEquatable<TKey>
     {
         oldCollection.RemoveAll(existingEntity => !newIdsCollection.Any(newId => newId.Equals(existingEntity.Id)));
-        var addedIds = newIdsCollection.Where(newId => !oldCollection.Any(existingEntity => existingEntity.Id.Equals(newId)));
+
+        IEnumerable<TKey> addedIds = newIdsCollection.Where(newId => !oldCollection.Any(existingEntity => existingEntity.Id.Equals(newId)));
 
         foreach (TKey newId in addedIds)
             oldCollection.Add(entityUpdateHelper.AttachById<TEntity, TKey>(newId));

src/DotNetElements.AppFramework.Abstractions/Model/ModelBase.cs

@@ -1,4 +1,7 @@
-namespace DotNetElements.AppFramework.Abstractions.Model;
+using System.Runtime.CompilerServices;
+using System.Runtime.Serialization;
+
+namespace DotNetElements.AppFramework.Abstractions.Model;
 
 public interface IModel<TKey> : IHasKey<TKey>
     where TKey : notnull, IEquatable<TKey>;
@@ -32,6 +35,12 @@ public abstract class EditModel<TModel, TKey> : IEditModel<TModel, TKey>
     where TKey : notnull, IEquatable<TKey>
 {
     public required TKey Id { get; init; }
+
+    protected static TSelf CreateNew<TSelf>()
+        where TSelf : EditModel<TModel, TKey>
+    {
+        return Activator.CreateInstance<TSelf>();
+    }
 }
 
 public abstract class VersionedEditModel<TModel, TKey> : EditModel<TModel, TKey>, IHasVersion

src/DotNetElements.AppFramework.MudBlazorExtensions/Components/LoadingStateContainer.razor

@@ -0,0 +1,27 @@
+@using DotNetElements.AppFramework.MudBlazorExtensions.Util
+
+@* todo implement option to show retry button and action to execute on retry *@
+
+@if (LoadingState is LoadingState.Loading)
+{
+    <MudProgressLinear Indeterminate="true" Color="Color.Primary" Class="my-2" />
+}
+else if (LoadingState is LoadingState.Error)
+{
+    <MudAlert Severity="Severity.Error" Class="my-2">
+        An error occurred while loading the content.
+    </MudAlert>
+}
+else if (LoadingState is LoadingState.Success)
+{
+    @ChildContent
+}
+
+@code
+{
+    [Parameter, EditorRequired]
+    public RenderFragment ChildContent { get; set; } = default!;
+
+    [Parameter, EditorRequired]
+    public LoadingState LoadingState { get; set; }
+}

src/DotNetElements.AppFramework.MudBlazorExtensions/Extensions/DialogServiceExtensions.cs

@@ -55,4 +55,10 @@ public static async Task<bool> ShowConfirmDeleteDialog(this IDialogService dialo
 
         return result?.Data is true;
     }
+
+    // todo add overload with list of error messages
+    public static Task ShowValidationErrorMessage(this IDialogService dialogService)
+    {
+        return dialogService.ShowMessageBox("Validation Error", "Please fix all validation errors.");
+    }
 }

src/DotNetElements.AppFramework.MudBlazorExtensions/Extensions/SnackbarExtensions.cs

@@ -30,6 +30,11 @@ public static void NotifyFailureFetchData(this ISnackbar snackbar)
         snackbar.NotifyFailure(DefaultMessageFailureFetch);
     }
 
+    public static void NotifyMissingQueryParameter(this ISnackbar snackbar, params Span<string?> parameterNames)
+    {
+        snackbar.NotifyFailure($"Missing query parameters: {string.Join(", ", parameterNames)}");
+    }
+
     public static void NotifySuccessCreateEntry(this ISnackbar snackbar)
     {
         snackbar.NotifySuccess(DefaultMessageSuccessCreate);

src/DotNetElements.AppFramework.MudBlazorExtensions/Util/LoadingState.cs

@@ -0,0 +1,9 @@
+namespace DotNetElements.AppFramework.MudBlazorExtensions.Util;
+
+public enum LoadingState
+{
+    None,
+    Loading,
+    Success,
+    Error
+}

src/DotNetElements.AppFramework.MudBlazorExtensions/Util/ModelValidationWrapper.cs

@@ -27,8 +27,15 @@ public bool Validate()
         return IsValid;
     }
 
-    public bool UpdateIsModified()
+    public bool UpdateIsModified(bool isExternalModified = false)
     {
+        if (isExternalModified)
+        {
+            IsModified = true;
+
+            return IsModified;
+        }
+
         IsModified = EditContext.IsModified();
 
         return IsModified;

src/DotNetElements.AppFramework/EfCore/ModuleService.cs

@@ -22,12 +22,12 @@ protected ModuleService(TDbContext dbContext, ICurrentUserProvider currentUserPr
     }
 
     // this should be high level method
-    protected async Task<int> AttachAndSaveChangesAsync<TEntity>(TEntity entity)
+    protected async Task AttachAndSaveChangesAsync<TEntity>(TEntity entity)
         where TEntity : class
     {
         DbContext.Set<TEntity>().Attach(entity);
 
-        return await DbContext.SaveChangesAsync();
+        await DbContext.SaveChangesAsync();
     }
 
     // this should be high level method