Add support for Polls and other API 4.2 updates.

bot.go

@@ -548,7 +548,7 @@ func (bot *BotAPI) GetStickerSet(config GetStickerSetConfig) (StickerSet, error)
 
 	resp, err := bot.MakeRequest(config.method(), params)
 	if err != nil {
-		return StickerSet{}, nil
+		return StickerSet{}, err
 	}
 
 	var stickers StickerSet
@@ -556,3 +556,21 @@ func (bot *BotAPI) GetStickerSet(config GetStickerSetConfig) (StickerSet, error)
 
 	return stickers, err
 }
+
+// StopPoll stops a poll and returns the result.
+func (bot *BotAPI) StopPoll(config StopPollConfig) (Poll, error) {
+	params, err := config.params()
+	if err != nil {
+		return Poll{}, err
+	}
+
+	resp, err := bot.MakeRequest(config.method(), params)
+	if err != nil {
+		return Poll{}, err
+	}
+
+	var poll Poll
+	err = json.Unmarshal(resp.Result, &poll)
+
+	return poll, err
+}

bot_test.go

@@ -700,3 +700,36 @@ func TestUnpinChatMessage(t *testing.T) {
 		t.Fail()
 	}
 }
+
+func TestPolls(t *testing.T) {
+	bot, _ := getBot(t)
+
+	poll := NewPoll(SupergroupChatID, "Are polls working?", "Yes", "No")
+
+	msg, err := bot.Send(poll)
+	if err != nil {
+		t.Error(err)
+		t.Fail()
+	}
+
+	result, err := bot.StopPoll(NewStopPoll(SupergroupChatID, msg.MessageID))
+	if err != nil {
+		t.Error(err)
+		t.Fail()
+	}
+
+	if result.Question != "Are polls working?" {
+		t.Error("Poll question did not match")
+		t.Fail()
+	}
+
+	if !result.IsClosed {
+		t.Error("Poll did not end")
+		t.Fail()
+	}
+
+	if result.Options[0].Text != "Yes" || result.Options[0].VoterCount != 0 || result.Options[1].Text != "No" || result.Options[1].VoterCount != 0 {
+		t.Error("Poll options were incorrect")
+		t.Fail()
+	}
+}

configs.go

@@ -499,6 +499,29 @@ func (config ContactConfig) method() string {
 	return "sendContact"
 }
 
+// SendPollConfig allows you to send a poll.
+type SendPollConfig struct {
+	BaseChat
+	Question string
+	Options  []string
+}
+
+func (config SendPollConfig) params() (Params, error) {
+	params, err := config.BaseChat.params()
+	if err != nil {
+		return params, err
+	}
+
+	params["question"] = config.Question
+	err = params.AddInterface("options", config.Options)
+
+	return params, err
+}
+
+func (SendPollConfig) method() string {
+	return "sendPoll"
+}
+
 // GameConfig allows you to send a game.
 type GameConfig struct {
 	BaseChat
@@ -671,6 +694,19 @@ func (config EditMessageReplyMarkupConfig) method() string {
 	return "editMessageReplyMarkup"
 }
 
+// StopPollConfig allows you to stop a poll sent by the bot.
+type StopPollConfig struct {
+	BaseEdit
+}
+
+func (config StopPollConfig) params() (Params, error) {
+	return config.BaseEdit.params()
+}
+
+func (StopPollConfig) method() string {
+	return "stopPoll"
+}
+
 // UserProfilePhotosConfig contains information about a
 // GetUserProfilePhotos request.
 type UserProfilePhotosConfig struct {

helpers.go

@@ -814,3 +814,24 @@ func NewDeleteChatPhoto(chatID int64, photo interface{}) DeleteChatPhotoConfig {
 		ChatID: chatID,
 	}
 }
+
+// NewPoll allows you to create a new poll.
+func NewPoll(chatID int64, question string, options ...string) SendPollConfig {
+	return SendPollConfig{
+		BaseChat: BaseChat{
+			ChatID: chatID,
+		},
+		Question: question,
+		Options:  options,
+	}
+}
+
+// NewStopPoll allows you to stop a poll.
+func NewStopPoll(chatID int64, messageID int) StopPollConfig {
+	return StopPollConfig{
+		BaseEdit{
+			ChatID:    chatID,
+			MessageID: messageID,
+		},
+	}
+}

types.go

@@ -37,6 +37,7 @@ type Update struct {
 	CallbackQuery      *CallbackQuery      `json:"callback_query"`
 	ShippingQuery      *ShippingQuery      `json:"shipping_query"`
 	PreCheckoutQuery   *PreCheckoutQuery   `json:"pre_checkout_query"`
+	Poll               *Poll               `json:"poll"`
 }
 
 // UpdatesChannel is the channel for getting updates.
@@ -141,6 +142,7 @@ type Message struct {
 	ForwardFromChat       *Chat              `json:"forward_from_chat"`       // optional
 	ForwardFromMessageID  int                `json:"forward_from_message_id"` // optional
 	ForwardSignature      string             `json:"forward_signature"`       // optional
+	ForwardSenderName     string             `json:"forward_sender_name"`     // optional
 	ForwardDate           int                `json:"forward_date"`            // optional
 	ReplyToMessage        *Message           `json:"reply_to_message"`        // optional
 	EditDate              int                `json:"edit_date"`               // optional
@@ -162,6 +164,7 @@ type Message struct {
 	Contact               *Contact           `json:"contact"`                 // optional
 	Location              *Location          `json:"location"`                // optional
 	Venue                 *Venue             `json:"venue"`                   // optional
+	Poll                  *Poll              `json:"poll"`                    // optional
 	NewChatMembers        []User             `json:"new_chat_members"`        // optional
 	LeftChatMember        *User              `json:"left_chat_member"`        // optional
 	NewChatTitle          string             `json:"new_chat_title"`          // optional
@@ -385,6 +388,20 @@ type Venue struct {
 	FoursquareID string   `json:"foursquare_id"` // optional
 }
 
+// PollOption contains information about one answer option in a poll.
+type PollOption struct {
+	Text       string `json:"text"`
+	VoterCount int    `json:"voter_count"`
+}
+
+// Poll contains information about a poll.
+type Poll struct {
+	ID       string       `json:"id"`
+	Question string       `json:"question"`
+	Options  []PollOption `json:"options"`
+	IsClosed bool         `json:"is_closed"`
+}
+
 // UserProfilePhotos contains a set of user profile photos.
 type UserProfilePhotos struct {
 	TotalCount int           `json:"total_count"`
@@ -487,6 +504,7 @@ type ChatMember struct {
 	CanRestrictMembers    bool   `json:"can_restrict_members,omitempty"`      // optional
 	CanPinMessages        bool   `json:"can_pin_messages,omitempty"`          // optional
 	CanPromoteMembers     bool   `json:"can_promote_members,omitempty"`       // optional
+	IsChatMember          bool   `json:"is_member"`                           // optional
 	CanSendMessages       bool   `json:"can_send_messages,omitempty"`         // optional
 	CanSendMediaMessages  bool   `json:"can_send_media_messages,omitempty"`   // optional
 	CanSendOtherMessages  bool   `json:"can_send_other_messages,omitempty"`   // optional