Refactor RoleService to use generic IDataSourceService

Refactored `IRoleService` to inherit from `IDataSourceService<ApplicationRoleDto>`, removing custom methods and properties. Replaced `RoleService` with the new `RoleDataSourceService`, which provides caching and data-loading functionality in a reusable manner.

Updated `Roles.razor` and `Users.razor` to use `IDataSourceService<ApplicationRoleDto>` instead of `IRoleService`. Changed `_roles` in `Users.razor` to `IReadOnlyList<ApplicationRoleDto>` to reflect its read-only nature.

Removed explicit `IRoleService` registration in `DependencyInjection.cs` in favor of auto-discovery of `IDataSourceService<T>` implementations. These changes simplify the codebase, reduce duplication, and improve maintainability.

Author: neozhu

src/Application/Common/Interfaces/Identity/IRoleService.cs

@@ -163,7 +163,6 @@ private static IServiceCollection AddBusinessServices(this IServiceCollection se
     {
         // Auto-discover and register all IDataSourceService<T> implementations
         services.AddDataSourceServices();
-        services.AddScoped<IRoleService, RoleService>();
         services.AddScoped<ITenantSwitchService, TenantSwitchService>();
 
 

src/Infrastructure/DependencyInjection.cs

@@ -0,0 +1,37 @@
+using CleanArchitecture.Blazor.Application.Features.Identity.DTOs;
+using CleanArchitecture.Blazor.Domain.Identity;
+using ZiggyCreatures.Caching.Fusion;
+
+namespace CleanArchitecture.Blazor.Infrastructure.Services.Identity;
+
+public class RoleDataSourceService : DataSourceServiceBase<ApplicationRoleDto>, IDisposable
+{
+    private const string CACHEKEY = "ALL-ApplicationRoleDto";
+    private readonly IMapper _mapper;
+    private readonly IServiceScopeFactory _scopeFactory;
+
+    public RoleDataSourceService(
+        IMapper mapper,
+        IFusionCache fusionCache,
+        IServiceScopeFactory scopeFactory)
+        : base(fusionCache, CACHEKEY)
+    {
+        _mapper = mapper;
+        _scopeFactory = scopeFactory;
+    }
+
+    protected override async Task<List<ApplicationRoleDto>?> LoadAsync(CancellationToken cancellationToken)
+    {
+        using var scope = _scopeFactory.CreateScope();
+        var roleManager = scope.ServiceProvider.GetRequiredService<RoleManager<ApplicationRole>>();
+        return await roleManager.Roles
+            .ProjectTo<ApplicationRoleDto>(_mapper.ConfigurationProvider)
+            .OrderBy(x => x.Name)
+            .ToListAsync(cancellationToken);
+    }
+
+    public void Dispose()
+    {
+        GC.SuppressFinalize(this);
+    }
+}

src/Infrastructure/Services/Identity/RoleDataSourceService.cs

@@ -12,7 +12,7 @@
 
 @attribute [Authorize(Policy = Permissions.Roles.View)]
 @inherits OwningComponentBase
-@inject IRoleService _roleService
+@inject IDataSourceService<ApplicationRoleDto> _roleService
 @inject IFusionCache _fusionCache
 @inject IStringLocalizer<Roles> _localizer
 @inject IExcelService ExcelService