Error handling. Vendoring

Signed-off-by: Ettore Dreucci <ettore.dreucci@gmail.com>

vendor/gopkg.in/tucnak/telebot.v2/callbacks.go

@@ -0,0 +1,81 @@
+package telebot
+
+// CallbackEndpoint is an interface any element capable
+// of responding to a callback `\f<unique>`.
+type CallbackEndpoint interface {
+	CallbackUnique() string
+}
+
+// Callback object represents a query from a callback button in an
+// inline keyboard.
+type Callback struct {
+	ID string `json:"id"`
+
+	// For message sent to channels, Sender may be empty
+	Sender *User `json:"from"`
+
+	// Message will be set if the button that originated the query
+	// was attached to a message sent by a bot.
+	Message *Message `json:"message"`
+
+	// MessageID will be set if the button was attached to a message
+	// sent via the bot in inline mode.
+	MessageID string `json:"inline_message_id"`
+
+	// Data associated with the callback button. Be aware that
+	// a bad client can send arbitrary data in this field.
+	Data string `json:"data"`
+}
+
+// CallbackResponse builds a response to a Callback query.
+//
+// See also: https://core.telegram.org/bots/api#answerCallbackQuery
+type CallbackResponse struct {
+	// The ID of the callback to which this is a response.
+	//
+	// Note: Telebot sets this field automatically!
+	CallbackID string `json:"callback_query_id"`
+
+	// Text of the notification. If not specified, nothing will be
+	// shown to the user.
+	Text string `json:"text,omitempty"`
+
+	// (Optional) If true, an alert will be shown by the client instead
+	// of a notification at the top of the chat screen. Defaults to false.
+	ShowAlert bool `json:"show_alert,omitempty"`
+
+	// (Optional) URL that will be opened by the user's client.
+	// If you have created a Game and accepted the conditions via
+	// @BotFather, specify the URL that opens your game.
+	//
+	// Note: this will only work if the query comes from a game
+	// callback button. Otherwise, you may use deep-linking:
+	// https://telegram.me/your_bot?start=XXXX
+	URL string `json:"url,omitempty"`
+}
+
+// InlineButton represents a button displayed in the message.
+type InlineButton struct {
+	// Unique slagish name for this kind of button,
+	// try to be as specific as possible.
+	//
+	// It will be used as a callback endpoint.
+	Unique string `json:"unique,omitempty"`
+
+	Text        string `json:"text"`
+	URL         string `json:"url,omitempty"`
+	Data        string `json:"callback_data,omitempty"`
+	InlineQuery string `json:"switch_inline_query,omitempty"`
+
+	Action func(*Callback) `json:"-"`
+}
+
+// CallbackUnique returns InlineButto.Unique.
+func (t *InlineButton) CallbackUnique() string {
+	return "\f" + t.Unique
+}
+
+// CallbackUnique returns KeyboardButton.Text.
+func (t *ReplyButton) CallbackUnique() string {
+	return t.Text
+}