Add dice usage example to EchoBot.

Author: sherzodv

README.md

@@ -1,6 +1,6 @@
 # F[Tg] - Telegramium
 
-[![Telegram](https://img.shields.io/badge/Telegram%20Bot%20API-4.6%20(January%2023%2C%202020)-blue)](https://core.telegram.org/bots/api#recent-changes)
+[![Telegram](https://img.shields.io/badge/Telegram%20Bot%20API-4.7%20(March%2030%2C%202020)-blue)](https://core.telegram.org/bots/api#recent-changes)
 
 
 F[Tg] is a pure functional Telegram Bot API for scala.
@@ -46,6 +46,10 @@ You may also want to have a look at these projects:
 * https://github.com/bot4s/telegram
 * https://github.com/paoloboni/telegram4s
 
+### Known usages
+
+* https://github.com/oybek/playcs_bot : telegram chat bot for creating counter strike 1.6 dedicated servers
+
 ### Note for Yan
 
 Yan, напиши бота.

telegramium-examples/src/main/scala/telegramium/bots/examples/EchoBot.scala

@@ -27,13 +27,20 @@ class EchoBot[F[_]](bot: Api[F])(implicit syncF: Sync[F], timer: Timer[F]) exten
               InlineKeyboardButton("Yes", callbackData = Some("Yes")),
               InlineKeyboardButton("No", callbackData = Some("No"))
             ),
+            List(
+              InlineKeyboardButton("Roll the dice", callbackData = Some("dice")),
+            ),
           )
         )
       )
     )).void
   }
 
   override def onCallbackQuery(query: CallbackQuery): F[Unit] = {
+    def rollTheDice(chatId: Long): F[Unit] = {
+      bot.sendDice(SendDiceReq(ChatIntId(chatId))).void >>
+        bot.answerCallbackQuery(AnswerCallbackQueryReq(callbackQueryId = query.id)).void
+    }
     def sendMsg(chatId: Long, text: String, parseMode: ParseMode): F[Unit] = {
       bot.sendMessage(SendMessageReq(
         chatId = ChatIntId(chatId),
@@ -45,6 +52,7 @@ class EchoBot[F[_]](bot: Api[F])(implicit syncF: Sync[F], timer: Timer[F]) exten
       case "HTML"      => query.message.fold(syncF.unit)(m => sendMsg(m.chat.id, htmlText, Html))
       case "Markdown"  => query.message.fold(syncF.unit)(m => sendMsg(m.chat.id, markdownText, Markdown))
       case "Markdown2" => query.message.fold(syncF.unit)(m => sendMsg(m.chat.id, markdown2Text, Markdown2))
+      case "dice"      => query.message.fold(syncF.unit)(m => rollTheDice(m.chat.id))
       case x => bot.answerCallbackQuery(AnswerCallbackQueryReq(
         callbackQueryId = query.id,
         text = Some(s"Your choice is $x")