Fixed #2633

src/Ombi.Core/Rule/Rules/Request/ExistingTVRequestRule.cs

@@ -0,0 +1,57 @@
+using System.Linq;
+using System.Threading.Tasks;
+using Microsoft.EntityFrameworkCore;
+using Ombi.Core.Rule.Interfaces;
+using Ombi.Store.Entities;
+using Ombi.Store.Entities.Requests;
+using Ombi.Store.Repository.Requests;
+
+namespace Ombi.Core.Rule.Rules.Request
+{
+    public class ExistingTvRequestRule : BaseRequestRule, IRules<BaseRequest>
+    {
+        public ExistingTvRequestRule(ITvRequestRepository rv)
+        {
+            Tv = rv;
+        }
+
+        private ITvRequestRepository Tv { get; }
+
+        /// <summary>
+        /// We check if the request exists, if it does then we don't want to re-request it.
+        /// </summary>
+        /// <param name="obj">The object.</param>
+        /// <returns></returns>
+        public async Task<RuleResult> Execute(BaseRequest obj)
+        {
+            if (obj.RequestType == RequestType.TvShow)
+            {
+                var tv = (ChildRequests) obj;
+                var tvRequests = Tv.GetChild();
+                var currentRequest = await tvRequests.FirstOrDefaultAsync(x => x.ParentRequest.TvDbId == tv.Id); // the Id on the child is the tvdbid at this point
+                if (currentRequest == null)
+                {
+                    return Success();
+                }
+                foreach (var season in tv.SeasonRequests)
+                {
+                    var currentSeasonRequest =
+                        currentRequest.SeasonRequests.FirstOrDefault(x => x.SeasonNumber == season.SeasonNumber);
+                    if (currentSeasonRequest == null)
+                    {
+                        continue;
+                    }
+                    foreach (var e in season.Episodes)
+                    {
+                        var hasEpisode = currentSeasonRequest.Episodes.Any(x => x.EpisodeNumber == e.EpisodeNumber);
+                        if (hasEpisode)
+                        {
+                            return Fail($"We already have episodes requested from series {tv.Title}");
+                        }
+                    }
+                }
+            }
+            return Success();
+        }
+    }
+}