Add Norwegian language subs (#50)

Co-authored-by: Dobrosław Żybort <[email protected]>

languages_substitution.go

@@ -10,7 +10,7 @@ func init() {
 	// TODO: Find better way so all langs are merged automatically and better
 	// tested.
 	for _, sub := range []*map[rune]string{
-		&deSub, &enSub, &esSub, &fiSub, &grSub, &kkSub, &nlSub, &plSub, &svSub, &slSub, &trSub,
+		&deSub, &enSub, &esSub, &fiSub, &grSub, &kkSub, &nlSub, &plSub, &svSub, &slSub, &trSub, &nbSub, &nnSub,
 	} {
 		for key, value := range defaultSub {
 			(*sub)[key] = value
@@ -87,6 +87,20 @@ var kkSub = map[rune]string{
 	'Ұ': "U",
 }
 
+var nbSub = map[rune]string{
+	'&': "og",
+	'@': "at",
+	'æ': "ae",
+	'ø': "oe",
+	'å': "aa",
+	'Æ': "Ae",
+	'Ø': "Oe",
+	'Å': "Aa",
+}
+
+// Norwegian Nynorsk has the same rules
+var nnSub = nbSub
+
 var nlSub = map[rune]string{
 	'&': "en",
 	'@': "at",

slug.go

@@ -75,6 +75,10 @@ func MakeLang(s string, lang string) (slug string) {
 		slug = SubstituteRune(slug, plSub)
 	case "sv", "swe":
 		slug = SubstituteRune(slug, svSub)
+	case "nn", "nno":
+		slug = SubstituteRune(slug, nnSub)
+	case "nb", "nob":
+		slug = SubstituteRune(slug, nbSub)
 	case "sl", "slv":
 		slug = SubstituteRune(slug, slSub)
 	case "tr", "tur":

slug_test.go

@@ -100,6 +100,12 @@ func TestSlugMakeLang(t *testing.T) {
 		{"sv", "This @ that", "this-snabel-a-that", true},
 		{"swe", "This & that", "this-och-that", true},
 		{"swe", "This @ that", "this-snabel-a-that", true},
+		{"nb", "Ærlig, Østen, Åse", "aerlig-oesten-aase", true},
+		{"nb", "This & that", "this-og-that", true},
+		{"nb", "This @ that", "this-at-that", true},
+		{"nn", "Ærlig, Østen, Åse", "aerlig-oesten-aase", true},
+		{"nn", "This & that", "this-og-that", true},
+		{"nn", "This @ that", "this-at-that", true},
 		{"tr", "This & that", "this-ve-that", true},
 		{"sl", "đanković & Kožušček", "dzankovic-in-kozuscek", true},
 		{"sl", "ĐankoVIĆ & KOŽUŠČEK", "DZankoVIC-in-KOZUSCEK", false},
@@ -115,6 +121,8 @@ func TestSlugMakeLang(t *testing.T) {
 		{"nl", "1\"2'3’4‒5–6—7―8", "1234-5-6-7-8", true},
 		{"pl", "1\"2'3’4‒5–6—7―8", "1234-5-6-7-8", true},
 		{"sv", "1\"2'3’4‒5–6—7―8", "1234-5-6-7-8", true},
+		{"nb", "1\"2'3’4‒5–6—7―8", "1234-5-6-7-8", true},
+		{"nn", "1\"2'3’4‒5–6—7―8", "1234-5-6-7-8", true},
 		{"sl", "1\"2'3’4-5–6—7―8", "1234-5-6-7-8", true},
 		{"tr", "1\"2'3’4‒5–6—7―8", "1234-5-6-7-8", true},
 	}