Add more helpers, update README for v4 release.

Author: Syfaro

README.md

@@ -17,7 +17,10 @@ something with plugins and command handlers without having to design
 all that yourself.
 
 Use `github.com/go-telegram-bot-api/telegram-bot-api` for the latest
-version, or use `gopkg.in/telegram-bot-api.v3` for the stable build.
+version, or use `gopkg.in/telegram-bot-api.v4` for the stable build.
+
+Join [the development group](https://telegram.me/go_telegram_bot_api) if
+you want to ask questions or discuss development.
 
 ## Example
 
@@ -29,7 +32,7 @@ package main
 
 import (
 	"log"
-	"gopkg.in/telegram-bot-api.v3"
+	"gopkg.in/telegram-bot-api.v4"
 )
 
 func main() {
@@ -65,7 +68,7 @@ you may use a slightly different method.
 package main
 
 import (
-	"gopkg.in/telegram-bot-api.v3"
+	"gopkg.in/telegram-bot-api.v4"
 	"log"
 	"net/http"
 )

configs.go

@@ -559,7 +559,7 @@ type EditMessageTextConfig struct {
 	Text                  string
 	ParseMode             string
 	DisableWebPagePreview bool
-	ReplyMarkup           InlineKeyboardMarkup
+	ReplyMarkup           *InlineKeyboardMarkup
 }
 
 func (config EditMessageTextConfig) values() (url.Values, error) {
@@ -580,7 +580,7 @@ func (config EditMessageTextConfig) method() string {
 type EditMessageCaptionConfig struct {
 	BaseEdit
 	Caption     string
-	ReplyMarkup InlineKeyboardMarkup
+	ReplyMarkup *InlineKeyboardMarkup
 }
 
 func (config EditMessageCaptionConfig) values() (url.Values, error) {
@@ -595,18 +595,18 @@ func (config EditMessageCaptionConfig) method() string {
 	return "editMessageCaption"
 }
 
-// EditMessageReplyMarkup allows you to modify the reply markup
+// EditMessageReplyMarkupConfig allows you to modify the reply markup
 // of a message.
-type EditMessageReplyMarkup struct {
+type EditMessageReplyMarkupConfig struct {
 	BaseEdit
-	ReplyMarkup InlineKeyboardMarkup
+	ReplyMarkup *InlineKeyboardMarkup
 }
 
-func (config EditMessageReplyMarkup) values() (url.Values, error) {
+func (config EditMessageReplyMarkupConfig) values() (url.Values, error) {
 	return config.BaseEdit.values()
 }
 
-func (config EditMessageReplyMarkup) method() string {
+func (config EditMessageReplyMarkupConfig) method() string {
 	return "editMessageReplyMarkup"
 }
 

helpers.go

@@ -351,3 +351,37 @@ func NewInlineQueryResultVideo(id, url string) InlineQueryResultVideo {
 		URL:  url,
 	}
 }
+
+// NewEditMessageText allows you to edit the text of a message.
+func NewEditMessageText(chatID int64, messageID int, text string) EditMessageTextConfig {
+	return EditMessageTextConfig{
+		BaseEdit: BaseEdit{
+			ChatID:    chatID,
+			MessageID: messageID,
+		},
+		Text: text,
+	}
+}
+
+// NewEditMessageCaption allows you to edit the caption of a message.
+func NewEditMessageCaption(chatID int64, messageID int, caption string) EditMessageCaptionConfig {
+	return EditMessageCaptionConfig{
+		BaseEdit: BaseEdit{
+			ChatID:    chatID,
+			MessageID: messageID,
+		},
+		Caption: caption,
+	}
+}
+
+// NewEditMessageReplyMarkup allows you to edit the inline
+// keyboard markup.
+func NewEditMessageReplyMarkup(chatID int64, messageID int, replyMarkup InlineKeyboardMarkup) EditMessageReplyMarkupConfig {
+	return EditMessageReplyMarkupConfig{
+		BaseEdit: BaseEdit{
+			ChatID:    chatID,
+			MessageID: messageID,
+		},
+		ReplyMarkup: &replyMarkup,
+	}
+}