WebApi + ClientApp, GraphQL, Reflection

Events-WebApi/Events.WebAPI.Contract/Queries/Generic/DoesItemExistsQuery.cs

@@ -0,0 +1,10 @@
+using Events.WebAPI.Contract.DTOs;
+using MediatR;
+
+namespace Events.WebAPI.Contract.Queries.Generic;
+
+public class DoesItemExistsQuery<TDto, TPK> (TPK id) : IRequest<bool>, IHasIdAsPK<TPK>
+  where TPK : IEquatable<TPK>
+{
+  public TPK Id { get; set; } = id;
+}

Events-WebApi/Events.WebAPI.Contract/Queries/Generic/GetCountQuery.cs

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+using MediatR;
+
+namespace Events.WebAPI.Contract.Queries.Generic;
+
+public abstract class GetCountQuery : IRequest<int>
+{    
+  public string? Filters { get; set; }   
+}
+
+public class GetCountQuery<TDto> : GetCountQuery
+{    
+  public static GetCountQuery<TDto> CreateForPK<TPK>(TPK id) where TPK : IEquatable<TPK> {
+    var query = new GetCountQuery<TDto>()
+    {
+      Filters = $"id=={id}"
+    };
+    return query;
+  }
+}  

Events-WebApi/Events.WebAPI.Contract/Queries/Generic/GetItemsQuery.cs

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+using MediatR;
+
+namespace Events.WebAPI.Contract.Queries.Generic;
+
+public class GetItemsQuery<TDto> : IRequest<List<TDto>>
+{
+  public string? Filters { get; set; }
+  public string? Sort { get; set; }
+  public bool Ascending { get; set; }
+  public int? PageSize { get; set; }
+  public int? Page { get; set; }
+}

Events-WebApi/Events.WebAPI.Contract/Queries/Generic/GetSingleItemQuery.cs

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+using Events.WebAPI.Contract.DTOs;
+using MediatR;
+
+namespace Events.WebAPI.Contract.Queries.Generic;
+
+public class GetSingleItemQuery<TDto, TPK>(TPK id) : IRequest<TDto>, IHasIdAsPK<TPK>
+  where TPK : IEquatable<TPK>
+{
+  public TPK Id { get; set; } = id;    
+}