Added pointer checks to check() functions

rss.go

@@ -142,17 +142,36 @@ func (s *Source) check() error {
 	return nil
 }
 
+func (c *Content) check() error {
+	if len(c.Value) == 0 {
+		return fmt.Errorf("error: value not set")
+	}
+
+	return nil
+}
+
 func (i *Item) check() error {
 	if len(i.Title) == 0 && len(i.Description) == 0 {
 		return fmt.Errorf("error: neither title nor description set")
 	}
 
+	if i.Enclosure != nil {
 		if err := i.Enclosure.check(); err != nil {
 			return fmt.Errorf("error checking enclosure: %v", err)
 		}
+	}
+
+	if i.Source != nil {
 		if err := i.Source.check(); err != nil {
 			return fmt.Errorf("error checking source: %v", err)
 		}
+	}
+
+	if i.Content != nil {
+		if err := i.Content.check(); err != nil {
+			return fmt.Errorf("error checking content: %v", err)
+		}
+	}
 
 	return nil
 }
@@ -168,12 +187,17 @@ func (c *Channel) check() error {
 		return fmt.Errorf("error: description not set")
 	}
 
+	if c.Image != nil {
 		if err := c.Image.check(); err != nil {
 			return fmt.Errorf("error checking image: %v", err)
 		}
+	}
+
+	if c.TextInput != nil {
 		if err := c.TextInput.check(); err != nil {
 			return fmt.Errorf("error checking textInput: %v", err)
 		}
+	}
 
 	for _, item := range c.Items {
 		if err := item.check(); err != nil {
@@ -188,7 +212,6 @@ func (f *Feed) check() error {
 	if f.Channels == nil {
 		return fmt.Errorf("error: feed has no channels")
 	}
-
 	for _, channel := range f.Channels {
 		if err := channel.check(); err != nil {
 			return fmt.Errorf("error checking channel: %v", err)