fix(message)!: omit empty Components and Embeds (#1483)

---------

Co-authored-by: Fedor Lapshin <fe.lap.prog@gmail.com>

message.go

@@ -251,8 +251,8 @@ type MessageSend struct {
 // is also where you should get the instance from.
 type MessageEdit struct {
 	Content         *string                 `json:"content,omitempty"`
-	Components      []MessageComponent      `json:"components"`
-	Embeds          []*MessageEmbed         `json:"embeds"`
+	Components      *[]MessageComponent     `json:"components,omitempty"`
+	Embeds          *[]*MessageEmbed        `json:"embeds,omitempty"`
 	AllowedMentions *MessageAllowedMentions `json:"allowed_mentions,omitempty"`
 	Flags           MessageFlags            `json:"flags,omitempty"`
 	// Files to append to the message
@@ -286,14 +286,14 @@ func (m *MessageEdit) SetContent(str string) *MessageEdit {
 // SetEmbed is a convenience function for setting the embed,
 // so you can chain commands.
 func (m *MessageEdit) SetEmbed(embed *MessageEmbed) *MessageEdit {
-	m.Embeds = []*MessageEmbed{embed}
+	m.Embeds = &[]*MessageEmbed{embed}
 	return m
 }
 
 // SetEmbeds is a convenience function for setting the embeds,
 // so you can chain commands.
 func (m *MessageEdit) SetEmbeds(embeds []*MessageEmbed) *MessageEdit {
-	m.Embeds = embeds
+	m.Embeds = &embeds
 	return m
 }
 

restapi.go

@@ -1797,16 +1797,18 @@ func (s *Session) ChannelMessageEditComplex(m *MessageEdit, options ...RequestOp
 	// TODO: Remove this when compatibility is not required.
 	if m.Embed != nil {
 		if m.Embeds == nil {
-			m.Embeds = []*MessageEmbed{m.Embed}
+			m.Embeds = &[]*MessageEmbed{m.Embed}
 		} else {
 			err = fmt.Errorf("cannot specify both Embed and Embeds")
 			return
 		}
 	}
 
-	for _, embed := range m.Embeds {
-		if embed.Type == "" {
-			embed.Type = "rich"
+	if m.Embeds != nil {
+		for _, embed := range *m.Embeds {
+			if embed.Type == "" {
+				embed.Type = "rich"
+			}
 		}
 	}