Put only one author on the book file name

- Closes: #64

lib/template.go

@@ -93,9 +93,21 @@ func stringsJoin(strs []string) string {
 	return strings.Join(strs, ", ")
 }
 
+func bookFileName(book database.Book) string {
+	var authorsStr string
+	switch len(book.Authors) {
+	case 0:
+		authorsStr = ""
+	case 1:
+		authorsStr = book.Authors[0] + " - "
+	default:
+		authorsStr = book.Authors[0] + ", ... - "
+	}
+	return url.PathEscape(fmt.Sprintf("%s%s.epub", authorsStr, book.Title))
+}
+
 func downloadUrl(book database.Book) string {
-	fileName := url.PathEscape(fmt.Sprintf("%s - %s.epub", strings.Join(book.Authors, ", "), book.Title))
+	return fmt.Sprintf("/download/%s/%s", book.ID, bookFileName(book))
-	return fmt.Sprintf("/download/%s/%s", book.ID, fileName)
 }
 
 func size2mb(size int) float32 {

lib/trantor.go

@@ -113,7 +113,7 @@ func downloadHandler(h handler) {
 	defer f.Close()
 
 	addCacheControlHeader(h.w, false)
-	http.ServeContent(h.w, h.r, fmt.Sprintf("%s - %s.epub", strings.Join(book.Authors, ", "), book.Title), book.UploadDate, f)
+	http.ServeContent(h.w, h.r, bookFileName(book), book.UploadDate, f)
 }
 
 type indexData struct {