Act as if there is an author in the feed when only checking the entry

entry.go

@@ -34,10 +34,15 @@ type Entry struct {
 // the atom:entry contains an atom:source element that contains an atom:author
 // element or, in an Atom Feed Document, the atom:feed element contains an
 // atom:author element itself.
-func (e *Entry) checkAuthors() error {
+func (e *Entry) checkAuthors(authorInFeed bool) error {
 	if e.Authors == nil {
-		if e.Source.Authors == nil {
-			return errors.New("no authors set in entry")
+		if !authorInFeed {
+			if e.Source == nil {
+				return errors.New("no authors set in entry")
+			}
+			if e.Source.Authors == nil {
+				return errors.New("no authors set in entry")
+			}
 		}
 	} else {
 		for i, a := range e.Authors {
@@ -64,6 +69,54 @@ func NewEntry(title string) (*Entry, error) {
 	}, nil
 }
 
+// AddAuthor adds the Person as an author to the Entry.
+func (e *Entry) AddAuthor(p *Person) {
+	if e.Authors == nil {
+		e.Authors = make([]*Person, 1)
+		e.Authors[0] = p
+	} else {
+		e.Authors = append(e.Authors, p)
+	}
+
+	e.Updated.DateTime = DateTime(time.Now())
+}
+
+// AddCategory adds the Category to the Entry.
+func (e *Entry) AddCategory(c *Category) {
+	if e.Categories == nil {
+		e.Categories = make([]*Category, 1)
+		e.Categories[0] = c
+	} else {
+		e.Categories = append(e.Categories, c)
+	}
+
+	e.Updated.DateTime = DateTime(time.Now())
+}
+
+// AddContributor adds the Person as a contributor to the Entry.
+func (e *Entry) AddContributor(c *Person) {
+	if e.Contributors == nil {
+		e.Contributors = make([]*Person, 1)
+		e.Contributors[0] = c
+	} else {
+		e.Contributors = append(e.Contributors, c)
+	}
+
+	e.Updated.DateTime = DateTime(time.Now())
+}
+
+// AddLink adds the Link to the Entry.
+func (e *Entry) AddLink(l *Link) {
+	if e.Links == nil {
+		e.Links = make([]*Link, 1)
+		e.Links[0] = l
+	} else {
+		e.Links = append(e.Links, l)
+	}
+
+	e.Updated.DateTime = DateTime(time.Now())
+}
+
 // AddExtension adds the ExtensionElement to the Entry.
 func (e *Entry) AddExtension(x *ExtensionElement) {
 	if e.Extensions == nil {
@@ -87,7 +140,7 @@ func (e *Entry) Check() error {
 		}
 	}
 
-	if err := e.checkAuthors(); err != nil {
+	if err := e.checkAuthors(true); err != nil {
 		return fmt.Errorf("entry %v: %v", e.ID.URI, err)
 	}
 

feed.go

@@ -128,7 +128,7 @@ func (f *Feed) Check() error {
 	// least one atom:author element.
 	if f.Authors == nil {
 		for _, e := range f.Entries {
-			if err := e.checkAuthors(); err != nil {
+			if err := e.checkAuthors(false); err != nil {
 				return fmt.Errorf("no authors set in feed %v: %v", f.ID.URI, err)
 			}
 		}