Make issue compatible with multiple authors

cmd/frontend/issues.go

@@ -33,7 +33,6 @@ func PublishLatestIssue(c *b.Config, db *b.DB, s *b.CookieStore) http.HandlerFun
 			Published:     true,
 			Rejected:      false,
 			Created:       time.Now(),
-			AuthorID:      session.Values["id"].(int64),
 			AutoGenerated: true,
 		}
 
@@ -49,6 +48,22 @@ func PublishLatestIssue(c *b.Config, db *b.DB, s *b.CookieStore) http.HandlerFun
 			return
 		}
 
+		authorIDs := make([]int64, 1)
+		var ok bool
+
+		if authorIDs[0], ok = session.Values["id"].(int64); !ok {
+			msg := "fälschlicherweise session.Values[\"id\"].(int64) für authorIDs[0] angenommen"
+			log.Println(msg)
+			http.Error(w, msg, http.StatusInternalServerError)
+			return
+		}
+
+		if err = db.WriteArticleAuthors(article.ID, authorIDs); err != nil {
+			log.Println(err)
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+			return
+		}
+
 		content := []byte(r.PostFormValue("issue-content"))
 		if len(content) == 0 {
 			http.Error(w, "Bitte eine Beschreibung eingeben.", http.StatusBadRequest)