Created all necessary Add methods for source

source.go

@@ -28,6 +28,56 @@ func NewSource() *Source {
 	return &Source{CommonAttributes: newCommonAttributes()}
 }
 
+// AddAuthor adds the Person as an author to the Entry.
+func (s *Source) AddAuthor(p *Person) {
+	if s.Authors == nil {
+		s.Authors = make([]*Person, 1)
+		s.Authors[0] = p
+	} else {
+		s.Authors = append(s.Authors, p)
+	}
+}
+
+// AddCategory adds the Category to the Entry.
+func (s *Source) AddCategory(c *Category) {
+	if s.Categories == nil {
+		s.Categories = make([]*Category, 1)
+		s.Categories[0] = c
+	} else {
+		s.Categories = append(s.Categories, c)
+	}
+}
+
+// AddContributor adds the Person as a contributor to the Entry.
+func (s *Source) AddContributor(c *Person) {
+	if s.Contributors == nil {
+		s.Contributors = make([]*Person, 1)
+		s.Contributors[0] = c
+	} else {
+		s.Contributors = append(s.Contributors, c)
+	}
+}
+
+// AddLink adds the Link to the Entry.
+func (s *Source) AddLink(l *Link) {
+	if s.Links == nil {
+		s.Links = make([]*Link, 1)
+		s.Links[0] = l
+	} else {
+		s.Links = append(s.Links, l)
+	}
+}
+
+// AddExtension adds the ExtensionElement to the Entry.
+func (s *Source) AddExtension(e *ExtensionElement) {
+	if s.Extensions == nil {
+		s.Extensions = make([]*ExtensionElement, 1)
+		s.Extensions[0] = e
+	} else {
+		s.Extensions = append(s.Extensions, e)
+	}
+}
+
 // Check checks the Source for incompatibilities with RFC4287. It returns an
 // error.
 func (s *Source) Check() error {