Initial commit

src/Gos.Services/Search/Aggregations/DiscourseYearAggregationProvider.cs

@@ -0,0 +1,31 @@
+using System.Collections.Generic;
+using System.Linq;
+using Gos.Core.Search.Aggregations;
+using Gos.ServiceModel.Enums;
+using Gos.ServiceModel.Types;
+
+namespace Gos.Services.Search.Aggregations
+{
+    public class DiscourseYearAggregationProvider : BaseAggregationProvider
+    {
+        public DiscourseYearAggregationProvider(IAggregatorFactory aggregatorFactory)
+            : base(aggregatorFactory)
+        {
+        }
+
+        public override AggregationType Type => AggregationType.DiscourseYear;
+
+        protected override List<AggregationItem> GetItems(IDictionary<string, int> items)
+        {
+            return (from item in items
+                let year = int.Parse(item.Key)
+                orderby item.Value descending, year
+                select new AggregationItem()
+                {
+                    Count = item.Value,
+                    Key = year,
+                    Title = year.ToString(),
+                }).ToList();
+        }
+    }
+}