Added canonical title diff

utils/AnimeGenresDiff.go

@@ -0,0 +1,24 @@
+package utils
+
+import "strings"
+
+// AnimeGenresDiff describes differing genres.
+type AnimeGenresDiff struct {
+	GenresA []string
+	GenresB []string
+}
+
+// String returns the description.
+func (diff *AnimeGenresDiff) String() string {
+	return "Genres are different"
+}
+
+// DetailsA shows the details for the first anime.
+func (diff *AnimeGenresDiff) DetailsA() string {
+	return strings.Join(diff.GenresA, ", ")
+}
+
+// DetailsB shows the details for the second anime.
+func (diff *AnimeGenresDiff) DetailsB() string {
+	return strings.Join(diff.GenresB, ", ")
+}

utils/AnimeTitleDiff.go

@@ -0,0 +1,22 @@
+package utils
+
+// AnimeTitleDiff describes differing titles.
+type AnimeTitleDiff struct {
+	TitleA string
+	TitleB string
+}
+
+// String returns the description.
+func (diff *AnimeTitleDiff) String() string {
+	return "Titles are different"
+}
+
+// DetailsA shows the details for the first anime.
+func (diff *AnimeTitleDiff) DetailsA() string {
+	return diff.TitleA
+}
+
+// DetailsB shows the details for the second anime.
+func (diff *AnimeTitleDiff) DetailsB() string {
+	return diff.TitleB
+}

utils/MALComparison.go

@@ -1,35 +1,18 @@
 package utils
 
 import (
-	"strings"
-
 	"github.com/animenotifier/arn"
 	"github.com/animenotifier/mal"
 )
 
+// AnimeDiff describes a difference between two anime.
 type AnimeDiff interface {
 	String() string
 	DetailsA() string
 	DetailsB() string
 }
 
-type AnimeGenresDiff struct {
-	GenresA []string
-	GenresB []string
-}
-
-func (diff *AnimeGenresDiff) String() string {
-	return "Genres are different"
-}
-
-func (diff *AnimeGenresDiff) DetailsA() string {
-	return strings.Join(diff.GenresA, ", ")
-}
-
-func (diff *AnimeGenresDiff) DetailsB() string {
-	return strings.Join(diff.GenresB, ", ")
-}
-
+// MALComparison encapsulates the difference between an ARN anime and a MAL anime.
 type MALComparison struct {
 	Anime       *arn.Anime
 	MALAnime    *mal.Anime