Improve readability of publication date functions

jmdict.go

@@ -63,19 +63,22 @@ func doDisplaySenseNumberTag(headword headword, entry jmdict.JmdictEntry, meta j
 }
 
 func jmdictPublicationDate(dictionary jmdict.Jmdict) string {
+	unknownDate := "unknown"
+	idx := len(dictionary.Entries) - 1
 	if len(dictionary.Entries) == 0 {
-		return "unknown"
+		return unknownDate
-	}
+	} else if len(dictionary.Entries[idx].Sense) == 0 {
-	dateEntry := dictionary.Entries[len(dictionary.Entries)-1]
+		return unknownDate
-	if len(dateEntry.Sense) == 0 || len(dateEntry.Sense[0].Glossary) == 0 {
+	} else if len(dictionary.Entries[idx].Sense[0].Glossary) == 0 {
-		return "unknown"
+		return unknownDate
 	}
+	dateGloss := dictionary.Entries[idx].Sense[0].Glossary[0].Content
 	r := regexp.MustCompile(`\d{4}-\d{2}-\d{2}`)
-	jmdictDate := r.FindString(dateEntry.Sense[0].Glossary[0].Content)
+	date := r.FindString(dateGloss)
-	if jmdictDate != "" {
+	if date != "" {
-		return jmdictDate
+		return date
 	} else {
-		return "unknown"
+		return unknownDate
 	}
 }
 

jmnedict.go

@@ -8,19 +8,22 @@ import (
 )
 
 func jmnedictPublicationDate(dictionary jmdict.Jmnedict) string {
+	unknownDate := "unknown"
+	idx := len(dictionary.Entries) - 1
 	if len(dictionary.Entries) == 0 {
-		return "unknown"
+		return unknownDate
-	}
+	} else if len(dictionary.Entries[idx].Translations) == 0 {
-	dateEntry := dictionary.Entries[len(dictionary.Entries)-1]
+		return unknownDate
-	if len(dateEntry.Translations) == 0 || len(dateEntry.Translations[0].Translations) == 0 {
+	} else if len(dictionary.Entries[idx].Translations[0].Translations) == 0 {
-		return "unknown"
+		return unknownDate
 	}
+	dateGloss := dictionary.Entries[idx].Translations[0].Translations[0]
 	r := regexp.MustCompile(`\d{4}-\d{2}-\d{2}`)
-	jmnedictDate := r.FindString(dateEntry.Translations[0].Translations[0])
+	date := r.FindString(dateGloss)
-	if jmnedictDate != "" {
+	if date != "" {
-		return jmnedictDate
+		return date
 	} else {
-		return "unknown"
+		return unknownDate
 	}
 }