Merge pull request #25 from Neur0toxine/send-reactions

add reaction sending support for Instagram

message.go

@@ -81,7 +81,7 @@ type IGMessageReaction struct {
 	// Mid is a message ID.
 	Mid string `json:"mid"`
 	// Action can be {react|unreact}
-	Action string `json:"action"`
+	Action ReactionAction `json:"action"`
 	// Reaction is a reaction name. Optional.
 	Reaction string `json:"reaction,omitempty"`
 	// Emoji is optional.

messenger.go

@@ -517,6 +517,20 @@ func (m *Messenger) SenderAction(to Recipient, action SenderAction) (QueryRespon
 	return response.SenderAction(action)
 }
 
+func (m *Messenger) InstagramReaction(
+	to Recipient,
+	mid string,
+	action ReactionAction,
+	reaction ...string,
+) (QueryResponse, error) {
+	response := &Response{
+		token:          m.token,
+		to:             to,
+		sendAPIVersion: m.sendAPIVersion,
+	}
+	return response.InstagramReaction(mid, action, reaction...)
+}
+
 // classify determines what type of message a webhook event is.
 func (m *Messenger) classify(info MessageInfo) Action {
 	if info.Message != nil {

response.go

@@ -360,6 +360,21 @@ func (r *Response) SenderAction(action SenderAction) (QueryResponse, error) {
 	return r.DispatchMessage(&m)
 }
 
+// InstagramReaction sends an info about Instagram reaction.
+func (r *Response) InstagramReaction(mid string, action ReactionAction, reaction ...string) (QueryResponse, error) {
+	m := SendInstagramReaction{
+		Recipient:    r.to,
+		SenderAction: action,
+		Payload: SenderInstagramReactionPayload{
+			MessageID: mid,
+		},
+	}
+	if len(reaction) > 0 {
+		m.Payload.Reaction = reaction[0]
+	}
+	return r.DispatchMessage(&m)
+}
+
 // DispatchMessage posts the message to messenger, return the error if there's any.
 func (r *Response) DispatchMessage(m interface{}) (QueryResponse, error) {
 	var res QueryResponse
@@ -549,3 +564,26 @@ type SendSenderAction struct {
 	Recipient    Recipient    `json:"recipient"`
 	SenderAction SenderAction `json:"sender_action"`
 }
+
+// ReactionAction contains info about reaction action type.
+type ReactionAction string
+
+const (
+	// ReactionActionReact is used when user added a reaction.
+	ReactionActionReact ReactionAction = "react"
+	// ReactionActionUnReact is used when user removed a reaction.
+	ReactionActionUnReact ReactionAction = "unreact"
+)
+
+// SendInstagramReaction is the information about sender action.
+type SendInstagramReaction struct {
+	Recipient    Recipient                      `json:"recipient"`
+	SenderAction ReactionAction                 `json:"sender_action"`
+	Payload      SenderInstagramReactionPayload `json:"payload"`
+}
+
+// SenderInstagramReactionPayload contains target message ID and reaction name.
+type SenderInstagramReactionPayload struct {
+	MessageID string `json:"message_id"`
+	Reaction  string `json:"reaction"`
+}