New: Year specification for custom formats

src/NzbDrone.Core/CustomFormats/Specifications/YearSpecification.cs

@@ -0,0 +1,41 @@
+using FluentValidation;
+using NzbDrone.Core.Annotations;
+using NzbDrone.Core.Validation;
+
+namespace NzbDrone.Core.CustomFormats
+{
+    public class YearSpecificationValidator : AbstractValidator<YearSpecification>
+    {
+        public YearSpecificationValidator()
+        {
+            RuleFor(c => c.Min).NotEmpty().GreaterThan(0);
+            RuleFor(c => c.Max).NotEmpty().GreaterThanOrEqualTo(c => c.Min);
+        }
+    }
+
+    public class YearSpecification : CustomFormatSpecificationBase
+    {
+        private static readonly YearSpecificationValidator Validator = new ();
+
+        public override int Order => 10;
+        public override string ImplementationName => "Year";
+
+        [FieldDefinition(1, Label = "Minimum Year", Type = FieldType.Number)]
+        public int Min { get; set; }
+
+        [FieldDefinition(2, Label = "Maximum Year", Type = FieldType.Number)]
+        public int Max { get; set; }
+
+        protected override bool IsSatisfiedByWithoutNegate(CustomFormatInput input)
+        {
+            var year = input.MovieInfo?.Year ?? input.Movie?.MovieMetadata?.Value?.Year;
+
+            return year >= Min && year <= Max;
+        }
+
+        public override NzbDroneValidationResult Validate()
+        {
+            return new NzbDroneValidationResult(Validator.Validate(this));
+        }
+    }
+}