From 43b3f0ace1456e6cc16a5a5f237c80d3338a2b45 Mon Sep 17 00:00:00 2001
From: Sergey <sergey@antsupov.xyz>
Date: Fri, 6 Sep 2019 16:41:36 +0300
Subject: [PATCH] Add helper for InlineKeyboardButtonLoginURL

---
 helpers.go      | 11 ++++++++++-
 helpers_test.go | 17 +++++++++++++++++
 types.go        |  6 +++---
 3 files changed, 30 insertions(+), 4 deletions(-)

diff --git a/helpers.go b/helpers.go
index b97aa2a..a7a7613 100644
--- a/helpers.go
+++ b/helpers.go
@@ -679,7 +679,16 @@ func NewInlineKeyboardButtonData(text, data string) InlineKeyboardButton {
 	}
 }
 
-// NewInlineKeyboardButtonURL creates an inline keyboard button with text
+// NewInlineKeyboardButtonLoginURL creates an inline keyboard button with text
+// which goes to a LoginURL.
+func NewInlineKeyboardButtonLoginURL(text string, loginUrl LoginURL) InlineKeyboardButton {
+	return InlineKeyboardButton{
+		Text:     text,
+		LoginURL: &loginUrl,
+	}
+}
+
+// NewInlineKeyboardButtonLoginURL creates an inline keyboard button with text
 // which goes to a URL.
 func NewInlineKeyboardButtonURL(text, url string) InlineKeyboardButton {
 	return InlineKeyboardButton{
diff --git a/helpers_test.go b/helpers_test.go
index 8e4508b..47c5d98 100644
--- a/helpers_test.go
+++ b/helpers_test.go
@@ -136,6 +136,23 @@ func TestNewInlineQueryResultLocation(t *testing.T) {
 	}
 }
 
+func TestNewInlineKeyboardButtonLoginURL(t *testing.T) {
+	result := NewInlineKeyboardButtonLoginURL("text", LoginURL{
+		URL:                "url",
+		ForwardText:        "ForwardText",
+		BotUsername:        "username",
+		RequestWriteAccess: false,
+	})
+
+	if result.Text != "text" ||
+		result.LoginURL.URL != "url" ||
+		result.LoginURL.ForwardText != "ForwardText" ||
+		result.LoginURL.BotUsername != "username" ||
+		result.LoginURL.RequestWriteAccess != false {
+		t.Fail()
+	}
+}
+
 func TestNewEditMessageText(t *testing.T) {
 	edit := NewEditMessageText(ChatID, ReplyToMessageID, "new text")
 
diff --git a/types.go b/types.go
index 78ebcf3..347d4b8 100644
--- a/types.go
+++ b/types.go
@@ -476,9 +476,9 @@ type InlineKeyboardButton struct {
 // LoginURL is the parameters for the login inline keyboard button type.
 type LoginURL struct {
 	URL                string `json:"url"`
-	ForwardText        string `json:"forward_text"`
-	BotUsername        string `json:"bot_username"`
-	RequestWriteAccess bool   `json:"request_write_access"`
+	ForwardText        string `json:"forward_text,omitempty"`
+	BotUsername        string `json:"bot_username,omitempty"`
+	RequestWriteAccess bool   `json:"request_write_access,omitempty"`
 }
 
 // CallbackQuery is data sent when a keyboard button with callback data