Revert "Swap to dapper and system.text.json for database backend"

This reverts commit d2065bfa1b.

src/NzbDrone.Core.Test/Datastore/Converters/TimeSpanConverterFixture.cs

@@ -0,0 +1,65 @@
+using System;
+using System.Globalization;
+using FluentAssertions;
+using Marr.Data.Converters;
+using NUnit.Framework;
+using NzbDrone.Core.Datastore.Converters;
+using NzbDrone.Core.Test.Framework;
+
+namespace NzbDrone.Core.Test.Datastore.Converters
+{
+    [TestFixture]
+    public class TimeSpanConverterFixture : CoreTest<TimeSpanConverter>
+    {
+        [Test]
+        public void should_return_string_when_saving_timespan_to_db()
+        {
+            var timeSpan = TimeSpan.FromMinutes(5);
+
+            Subject.ToDB(timeSpan).Should().Be(timeSpan.ToString("c", CultureInfo.InvariantCulture));
+        }
+
+        [Test]
+        public void should_return_null_when_saving_empty_string_to_db()
+        {
+            Subject.ToDB("").Should().Be(null);
+        }
+
+        [Test]
+        public void should_return_time_span_when_getting_time_span_from_db()
+        {
+            var timeSpan = TimeSpan.FromMinutes(5);
+
+            var context = new ConverterContext
+                          {
+                              DbValue = timeSpan
+                          };
+
+            Subject.FromDB(context).Should().Be(timeSpan);
+        }
+
+        [Test]
+        public void should_return_time_span_when_getting_string_from_db()
+        {
+            var timeSpan = TimeSpan.FromMinutes(5);
+
+            var context = new ConverterContext
+                          {
+                              DbValue = timeSpan.ToString("c", CultureInfo.InvariantCulture)
+                          };
+
+            Subject.FromDB(context).Should().Be(timeSpan);
+        }
+
+        [Test]
+        public void should_return_time_span_zero_for_db_null_value_when_getting_from_db()
+        {
+            var context = new ConverterContext
+                          {
+                              DbValue = DBNull.Value
+                          };
+
+            Subject.FromDB(context).Should().Be(TimeSpan.Zero);
+        }
+    }
+}