Support for Button Templates

README.md

@@ -1,7 +1,7 @@
 Messenger Platform Go SDK
 =====
 
-[![Build Status](https://travis-ci.org/maciekmm/messenger-platform-go-sdk.svg?branch=master)](https://travis-ci.org/maciekmm/messenger-platform-go-sdk) 
+[![Build Status](https://travis-ci.org/maciekmm/messenger-platform-go-sdk.svg?branch=master)](https://travis-ci.org/maciekmm/messenger-platform-go-sdk)
 [![Coverage Status](https://coveralls.io/repos/github/maciekmm/messenger-platform-go-sdk/badge.svg?branch=master)](https://coveralls.io/github/maciekmm/messenger-platform-go-sdk?branch=master)
 
 A Go SDK for the [Facebook Messenger Platform](https://developers.facebook.com/docs/messenger-platform).
@@ -14,7 +14,7 @@ go get gopkg.in/maciekmm/messenger-platform-go-sdk.v4
 
 ## Usage
 
-The main package has been named `messenger` for convenience. 
+The main package has been named `messenger` for convenience.
 
 Your first step is to create `Messenger` instance.
 
@@ -37,7 +37,7 @@ messenger := &messenger.Messenger {
 * `AccessToken` is required to send messages. You can find this token in your app developer dashboard under `Messenger` tab.
 * `Debug` is used for setting debug mode type as described on https://developers.facebook.com/docs/graph-api/using-graph-api#debugging. Optional.
 
-The next step is to hook up the handler to your HTTP server. 
+The next step is to hook up the handler to your HTTP server.
 
 ```go
 //hook up
@@ -62,7 +62,7 @@ func MessageReceived(event messenger.Event, opts messenger.MessageOpts, msg mess
 
 ## Example
 
-Check more examples in [examples folder.](https://github.com/maciekmm/messenger-platform-go-sdk/tree/master/examples)
+Check more examples in [examples folder.](https://github.com/seenickcode/messenger-platform-go-sdk/tree/master/examples)
 
 ```go
 var mess = &messenger.Messenger{

attachment_test.go

@@ -5,7 +5,7 @@ import (
 	"reflect"
 	"testing"
 
-	"github.com/maciekmm/messenger-platform-go-sdk/template"
+	"github.com/seenickcode/messenger-platform-go-sdk/template"
 )
 
 func TestAttachmentUnmarshalling(t *testing.T) {

examples/base.go

@@ -4,7 +4,7 @@ import (
 	"log"
 	"net/http"
 
-	"github.com/maciekmm/messenger-platform-go-sdk"
+	"github.com/seenickcode/messenger-platform-go-sdk"
 )
 
 var mess = &messenger.Messenger{

examples/echo.go

@@ -3,7 +3,7 @@ package main
 import (
 	"fmt"
 
-	"github.com/maciekmm/messenger-platform-go-sdk"
+	"github.com/seenickcode/messenger-platform-go-sdk"
 )
 
 func init() {

examples/template.go

@@ -3,8 +3,8 @@ package main
 import (
 	"fmt"
 
-	"github.com/maciekmm/messenger-platform-go-sdk"
-	"github.com/maciekmm/messenger-platform-go-sdk/template"
+	"github.com/seenickcode/messenger-platform-go-sdk"
+	"github.com/seenickcode/messenger-platform-go-sdk/template"
 )
 
 func init() {
@@ -13,7 +13,7 @@ func init() {
 		mq.RecipientID(opts.Sender.ID)
 		mq.Template(template.GenericTemplate{Title: "abc",
 			Buttons: []template.Button{
-				template.Button{
+				{
 					Type:    template.ButtonTypePostback,
 					Payload: "test",
 					Title:   "abecadło",

messagequery.go

@@ -3,7 +3,7 @@ package messenger
 import (
 	"errors"
 
-	"github.com/maciekmm/messenger-platform-go-sdk/template"
+	"github.com/seenickcode/messenger-platform-go-sdk/template"
 )
 
 type ContentType string
@@ -122,11 +122,19 @@ func (mq *MessageQuery) Template(tpl template.Template) error {
 
 	for _, v := range payload.Elements {
 		if v.Type() != tpl.Type() {
-			return errors.New("All templates have to have thesame type.")
+			return errors.New("All templates have to have the same type.")
 		}
 	}
 
-	payload.Elements = append(payload.Elements, tpl)
+	if t, ok := tpl.(template.ButtonTemplate); ok {
+		payload.ButtonsText += t.Text
+		for _, b := range t.Buttons {
+			payload.Buttons = append(payload.Buttons, b)
+		}
+	} else {
+		payload.Elements = append(payload.Elements, tpl)
+	}
+
 	return nil
 }
 

messagequery_test.go

@@ -3,7 +3,7 @@ package messenger
 import (
 	"testing"
 
-	"github.com/maciekmm/messenger-platform-go-sdk/template"
+	"github.com/seenickcode/messenger-platform-go-sdk/template"
 )
 
 func TestRandString(t *testing.T) {

persistentmenu.go

@@ -0,0 +1,60 @@
+package messenger
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"net/http"
+)
+
+type MenuItemType string
+
+const (
+	MenuItemTypeWebURL   MenuItemType = "web_url"
+	MenuItemTypePostback MenuItemType = "postback"
+	MenuItemTypeNested   MenuItemType = "nested"
+)
+
+type MenuItem struct {
+	Type          MenuItemType `json:"type"`
+	Title         string       `json:"title"`
+	URL           string       `json:"url,omitempty"`
+	Payload       string       `json:"payload,omitempty"`
+	CallToActions []MenuItem   `json:"call_to_actions,omitempty"`
+	// TODO webview_height_ratio
+	// TODO messenger_extensions
+	// TODO fallback_url
+}
+
+type PersistentMenu struct {
+	Locale                string     `json:"locale"`
+	ComposerInputDisabled bool       `json:"composer_input_disabled"`
+	CallToActions         []MenuItem `json:"call_to_actions,omitempty"`
+}
+
+type PersistentMenuSettings struct {
+	PersistentMenu []PersistentMenu `json:"persistent_menu"`
+}
+
+func (m *Messenger) SetNestedPersistentMenu(set *PersistentMenuSettings) error {
+	body, err := json.Marshal(set)
+	if err != nil {
+		return err
+	}
+
+	resp, err := m.doRequest("POST", GraphAPI+"/v2.6/me/messenger_profile", bytes.NewReader(body))
+	if err != nil {
+		return err
+	}
+	defer resp.Body.Close()
+	if resp.StatusCode != http.StatusOK {
+		return fmt.Errorf("Invalid status code %d", resp.StatusCode)
+	}
+	decoder := json.NewDecoder(resp.Body)
+	result := &result{}
+	err = decoder.Decode(result)
+	if err != nil {
+		return err
+	}
+	return nil
+}

template/buttons.go

@@ -9,6 +9,7 @@ const (
 	ButtonTypePhoneNumber   ButtonType = "phone_number"
 	ButtonTypeAccountLink   ButtonType = "account_link"
 	ButtonTypeAccountUnlink ButtonType = "account_unlink"
+	ButtonTypeShare         ButtonType = "element_share"
 )
 
 type Button struct {

template/template.go

@@ -1,9 +1,6 @@
 package template
 
-import (
-	"encoding/json"
-	"errors"
-)
+import "encoding/json"
 
 type TemplateType string
 
@@ -13,20 +10,27 @@ type Template interface {
 }
 
 type Payload struct {
-	Elements []Template `json:"elements"`
+	Elements    []Template `json:"elements"`
+	Buttons     []Button   `json:"buttons"` // used only for the Button Template
+	ButtonsText string     `json:"text"`    //
 }
 
 type rawPayload struct {
-	Type     TemplateType `json:"template_type"`
-	Elements []Template   `json:"elements"`
+	Type        TemplateType `json:"template_type"`
+	Elements    []Template   `json:"elements,omitempty"`
+	Buttons     []Button     `json:"buttons,omitempty"` // used only for the Button Template
+	ButtonsText string       `json:"text,omitempty"`    //
 }
 
 func (p *Payload) MarshalJSON() ([]byte, error) {
 	rp := &rawPayload{}
-	if len(p.Elements) < 1 {
-		return []byte{}, errors.New("Elements slice cannot be empty")
-	}
 	rp.Elements = p.Elements
-	rp.Type = p.Elements[0].Type()
+	rp.Buttons = p.Buttons
+	if len(p.Elements) > 0 {
+		rp.Type = p.Elements[0].Type()
+	} else if len(p.Buttons) > 0 {
+		rp.Type = TemplateTypeButton
+		rp.ButtonsText = p.ButtonsText
+	}
 	return json.Marshal(rp)
 }

threadsettings.go

@@ -6,7 +6,7 @@ import (
 	"fmt"
 	"net/http"
 
-	"github.com/maciekmm/messenger-platform-go-sdk/template"
+	"github.com/seenickcode/messenger-platform-go-sdk/template"
 )
 
 type settingType string
@@ -106,7 +106,7 @@ func (m *Messenger) SetGetStartedButton(payload string) error {
 	result, err := m.changeThreadSettings(http.MethodPost, &threadSettings{
 		Type:          settingTypeCallToActions,
 		State:         threadStateNew,
-		CallToActions: []ctaPayload{ctaPayload{Payload: payload}},
+		CallToActions: []ctaPayload{{Payload: payload}},
 	})
 	if err != nil {
 		return err

threadsettings_test.go

@@ -3,7 +3,7 @@ package messenger
 import (
 	"testing"
 
-	"github.com/maciekmm/messenger-platform-go-sdk/template"
+	"github.com/seenickcode/messenger-platform-go-sdk/template"
 )
 
 func TestSetGreetingText(t *testing.T) {