Adds list of author computation

album.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"regexp"
 	"strconv"
 	"time"
 )
@@ -70,3 +71,33 @@ type Album struct {
 func AlbumIDString(ID AlbumID) string {
 	return strconv.FormatUint(uint64(ID), 10)
 }
+
+var rxAuthorSkip = regexp.MustCompile(`\A<.*>\z`)
+
+func (a *Album) Authors() []string {
+	authorsUnsafe := make([]string, 0, len(a.Scenarists)+len(a.Colorists)+len(a.Designers))
+	authors := make([]string, 0, len(a.Scenarists)+len(a.Colorists)+len(a.Designers))
+	set := map[string]bool{}
+
+	authorsUnsafe = append(authorsUnsafe, a.Designers...)
+	authorsUnsafe = append(authorsUnsafe, a.Scenarists...)
+	authorsUnsafe = append(authorsUnsafe, a.Colorists...)
+
+	for _, author := range authorsUnsafe {
+		if rxAuthorSkip.MatchString(author) == true || set[author] == true {
+			continue
+		}
+		authors = append(authors, author)
+		set[author] = true
+	}
+
+	return authors
+}
+
+func (a *Album) String() string {
+	res := strconv.FormatUint(uint64(a.ID), 10) + ": "
+	if len(a.Collection) > 0 {
+		res += a.Collection + ": "
+	}
+	return res + a.Title
+}