Add tokenfield tag editor

lib/database/database.go

@@ -33,6 +33,7 @@ type DB interface {
 	IncDownloads(ID string) error
 	GetDownloadCounter(ID string) (int, error)
 	GetFrontPage() FrontPage
+	GetTags() ([]string, error)
 	AddSubmission(submission Submission, userName string) (id int, err error)
 	UpdateSubmission(id int, status string, book *Book) error
 	UpdateSubmissionByBook(bookID string, status string, book *Book) error

lib/database/ro.go

@@ -109,6 +109,10 @@ func (db *roDB) GetFrontPage() FrontPage {
 	return db.db.GetFrontPage()
 }
 
+func (db *roDB) GetTags() ([]string, error) {
+	return db.db.GetTags()
+}
+
 func (db *roDB) AddSubmission(submission Submission, userName string) (id int, err error) {
 	return 0, errors.New("RO database")
 }

lib/database/stats.go

@@ -96,6 +96,10 @@ func (db *pgDB) frontPageUpdater() {
 	}
 }
 
+func (db *pgDB) GetTags() ([]string, error) {
+	return db.frontPage.Tags, nil
+}
+
 func (db *pgDB) getVisitedBooks(num int) (books []Book, err error) {
 	err = db.sql.Model(&books).
 		Column("book.*").