feat: add user interest toggle endpoint

Author: ahmed12348

backend/src/CCE.Api.External/Endpoints/UserInterestEndpoints.cs

@@ -24,7 +24,7 @@ public static IEndpointRouteBuilder MapUserInterestEndpoints(this IEndpointRoute
             if (userId == System.Guid.Empty) return Results.Unauthorized();
 
             var result = await mediator.Send(
-                new UpsertUserInterestCommand(userId, body.Interest), ct).ConfigureAwait(false);
+                new UpsertUserInterestCommand(userId, body.Interests), ct).ConfigureAwait(false);
             return result.ToHttpResult();
         })
         .WithName("UpsertUserInterest");
@@ -33,4 +33,4 @@ public static IEndpointRouteBuilder MapUserInterestEndpoints(this IEndpointRoute
     }
 }
 
-public sealed record UpsertUserInterestRequest(string Interest);
+public sealed record UpsertUserInterestRequest(IReadOnlyList<string> Interests);

backend/src/CCE.Application/Identity/Public/Commands/UserInterest/UpsertUserInterestCommand.cs

@@ -5,4 +5,4 @@ namespace CCE.Application.Identity.Public.Commands.UserInterest;
 
 public sealed record UpsertUserInterestCommand(
     System.Guid UserId,
-    string Interest) : IRequest<Response<UpsertUserInterestResult>>;
+    IReadOnlyList<string> Interests) : IRequest<Response<UpsertUserInterestResult>>;

backend/src/CCE.Application/Identity/Public/Commands/UserInterest/UpsertUserInterestCommandHandler.cs

@@ -1,3 +1,4 @@
+using System.Linq;
 using CCE.Application.Common;
 using CCE.Application.Common.Interfaces;
 using CCE.Application.Messages;
@@ -30,13 +31,21 @@ public async Task<Response<UpsertUserInterestResult>> Handle(
         if (user is null)
             return _msg.UserNotFound<UpsertUserInterestResult>();
 
-        var added = user.ToggleInterest(request.Interest);
+        var oldInterests = user.Interests.ToList();
+        var newList = request.Interests ?? System.Array.Empty<string>();
+
+        user.UpdateInterests(newList);
+
+        var newInterests = user.Interests;
+        var added = newInterests.Except(oldInterests).ToList();
+        var removed = oldInterests.Except(newInterests).ToList();
 
         _service.Update(user);
         await _db.SaveChangesAsync(cancellationToken).ConfigureAwait(false);
 
         return _msg.InterestUpserted(new UpsertUserInterestResult(
-            user.Interests,
-            added));
+            newInterests,
+            added,
+            removed));
     }
 }

backend/src/CCE.Application/Identity/Public/Commands/UserInterest/UpsertUserInterestResult.cs

@@ -2,4 +2,5 @@ namespace CCE.Application.Identity.Public.Commands.UserInterest;
 
 public sealed record UpsertUserInterestResult(
     IReadOnlyList<string> Interests,
-    bool Added);
+    IReadOnlyList<string> Added,
+    IReadOnlyList<string> Removed);