Check atom feed for nil returns

cmd/backend/atom.go

@@ -1,6 +1,7 @@
 package backend
 
 import (
+	"errors"
 	"fmt"
 	"io"
 	"os"
@@ -12,6 +13,9 @@ func GenerateAtomFeed(c *Config, db *DB) (*string, error) {
 	feed := atom.NewFeed(c.Title)
 	feed.ID = atom.NewID("urn:feed:1")
 	feed.Subtitle = atom.NewText("text", c.Description)
+	if feed.Subtitle == nil {
+		return nil, errors.New("feed subtitle was not created")
+	}
 
 	linkID := feed.AddLink(atom.NewLink(c.Link))
 	feed.Links[linkID].Rel = "self"
@@ -34,15 +38,24 @@ func GenerateAtomFeed(c *Config, db *DB) (*string, error) {
 		entry.ID = atom.NewID(fmt.Sprint("urn:entry:", article.ID))
 		entry.Published = atom.NewDate(article.Created)
 		entry.Content = atom.NewContent(atom.OutOfLine, "text/html", fmt.Sprint(c.Domain, "/article/serve/", article.UUID))
+		if entry.Content == nil {
+			return nil, errors.New("entry content was not created")
+		}
 
 		if article.AutoGenerated {
 			entry.Summary = atom.NewText("text", "automatically generated")
+			if entry.Summary == nil {
+				return nil, errors.New("entry summary was not created")
+			}
 		} else {
 			articleSummary, err := ConvertToPlain(article.Summary)
 			if err != nil {
 				return nil, fmt.Errorf("error converting description to plain text for Atom feed: %v", err)
 			}
 			entry.Summary = atom.NewText("text", articleSummary)
+			if entry.Summary == nil {
+				return nil, errors.New("entry summary was not created")
+			}
 		}
 
 		if len(article.BannerLink) > 0 {