Merge pull request #47 from albttx/enable-chat-extension

feat: EnableChatExtension

examples/extension/main.go

@@ -0,0 +1,66 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"log"
+	"net/http"
+	"os"
+	"time"
+
+	"github.com/paked/messenger"
+)
+
+var (
+	serverURL   = flag.String("serverURL", "", "The server (webview) URL, must be https (required)")
+	verifyToken = flag.String("verify-token", "mad-skrilla", "The token used to verify facebook (required)")
+	verify      = flag.Bool("should-verify", false, "Whether or not the app should verify itself")
+	pageToken   = flag.String("page-token", "not skrilla", "The token that is used to verify the page on facebook")
+	appSecret   = flag.String("app-secret", "", "The app secret from the facebook developer portal (required)")
+	host        = flag.String("host", "localhost", "The host used to serve the messenger bot")
+	port        = flag.Int("port", 8080, "The port used to serve the messenger bot")
+)
+
+func main() {
+	flag.Parse()
+
+	if *verifyToken == "" || *appSecret == "" || *pageToken == "" {
+		fmt.Printf("missing arguments\n\n")
+		flag.Usage()
+
+		os.Exit(-1)
+	}
+
+	client := messenger.New(messenger.Options{
+		Verify:      *verify,
+		AppSecret:   *appSecret,
+		VerifyToken: *verifyToken,
+		Token:       *pageToken,
+	})
+
+	err := client.EnableChatExtension(messenger.HomeURL{
+		URL:                *serverURL,
+		WebviewHeightRatio: "tall",
+		WebviewShareButton: "show",
+		InTest:             true,
+	})
+	if err != nil {
+		fmt.Println("Failed to EnableChatExtension, err=", err)
+	}
+
+	// Setup a handler to be triggered when a message is received
+	client.HandleMessage(func(m messenger.Message, r *messenger.Response) {
+		fmt.Printf("%v (Sent, %v)\n", m.Text, m.Time.Format(time.UnixDate))
+
+		p, err := client.ProfileByID(m.Sender.ID)
+		if err != nil {
+			fmt.Println("Something went wrong!", err)
+		}
+
+		r.Text(fmt.Sprintf("Hello, %v!", p.FirstName), messenger.ResponseType)
+	})
+
+	addr := fmt.Sprintf("%s:%d", *host, *port)
+	log.Println("Serving messenger bot on", addr)
+	log.Fatal(http.ListenAndServe(addr, client.Handler()))
+}

messenger.go

@@ -20,6 +20,11 @@ const (
 	ProfileFields = "first_name,last_name,profile_pic,locale,timezone,gender"
 	// SendSettingsURL is API endpoint for saving settings.
 	SendSettingsURL = "https://graph.facebook.com/v2.6/me/thread_settings"
+
+	// MessengerProfileURL is the API endoint where yout bot set properties that define various aspects of the following Messenger Platform features.
+	// Used in the form https://graph.facebook.com/v2.6/me/messenger_profile?access_token=<PAGE_ACCESS_TOKEN>
+	// https://developers.facebook.com/docs/messenger-platform/reference/messenger-profile-api/
+	MessengerProfileURL = "https://graph.facebook.com/v2.6/me/messenger_profile"
 )
 
 // Options are the settings used when creating a Messenger client.
@@ -435,6 +440,35 @@ func (m *Messenger) Attachment(to Recipient, dataType AttachmentType, url string
 	return response.Attachment(dataType, url, messagingType, tags...)
 }
 
+// EnableChatExtension set the homepage url required for a chat extension.
+func (m *Messenger) EnableChatExtension(homeURL HomeURL) error {
+	wrap := map[string]interface{}{
+		"home_url": homeURL,
+	}
+	data, err := json.Marshal(wrap)
+	if err != nil {
+		return err
+	}
+
+	req, err := http.NewRequest("POST", MessengerProfileURL, bytes.NewBuffer(data))
+	if err != nil {
+		return err
+	}
+
+	req.Header.Set("Content-Type", "application/json")
+	req.URL.RawQuery = "access_token=" + m.token
+
+	client := &http.Client{}
+
+	resp, err := client.Do(req)
+	if err != nil {
+		return err
+	}
+	defer resp.Body.Close()
+
+	return checkFacebookError(resp.Body)
+}
+
 // classify determines what type of message a webhook event is.
 func (m *Messenger) classify(info MessageInfo, e Entry) Action {
 	if info.Message != nil {

settings.go

@@ -44,3 +44,12 @@ type CallToActionsItem struct {
 	WebviewHeightRatio string `json:"webview_height_ratio,omitempty"`
 	MessengerExtension bool   `json:"messenger_extensions,omitempty"`
 }
+
+// HomeURL is the settings for EnableChatExtension
+// https://developers.facebook.com/docs/messenger-platform/reference/messenger-profile-api/home-url
+type HomeURL struct {
+	URL                string `json:"url,omitempty"`
+	WebviewHeightRatio string `json:"webview_height_ratio,omitempty"`
+	WebviewShareButton string `json:"webview_share_button,omitempty"`
+	InTest             bool   `json:"in_test,omitempty"`
+}