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
+}

album_test.go

@@ -11,3 +11,30 @@ func Test(t *testing.T) { TestingT(t) }
 type AlbumSuite struct{}
 
 var _ = Suite(&AlbumSuite{})
+
+func (s *AlbumSuite) TestAuthors(c *C) {
+	data := map[AlbumID][]string{
+		8179:   []string{"Berthet, Philippe", "Andreas"},
+		44989:  []string{"Loro"},
+		58595:  []string{"Plantu"},
+		19762:  []string{"Swal, Christophe", "Polouchine, Igor", "Rastoin, Bernard", "Robert, Jacky"},
+		9935:   []string{"Fournier, Jean-Claude", "D'Authenay, Anne-Marie"},
+		164:    []string{"Adamov, Philippe", "Cothias, Patrick"},
+		22737:  []string{"Leo", "Rodolphe", "Scarlett"},
+		32043:  []string{"Joan", "Harty", "Ptiluc"},
+		46005:  []string{"Tibet"},
+		15875:  []string{"Veyron, Martin"},
+		84448:  []string{"Delitte, Jean-Yves"},
+		160366: []string{"Trondheim, Lewis", "Findakly, Brigitte"},
+		754:    []string{"Bruyninx, Marc"},
+		52100:  []string{"Guénet, Nicolas", "Téhy", "Vee, J.M."},
+	}
+
+	for _, a := range albumsDataTest {
+		expected, ok := data[a.ID]
+		if c.Check(ok, Equals, true) == true {
+			c.Check(a.Authors(), DeepEquals, expected)
+		}
+	}
+
+}