telegram-api

High-level bindings to the Telegram Bot API based on servant library. Both getUpdates request or webhook can be used to receive updates for your bot. Inline mode is supported. Uploading stickers, documents, video, etc is not supported yet, but you can send items which are already uploaded on the Telegram servers.

Support of Bot-3.5 API

Usage

There are two ways of using Telegram Bot API. First and original way is to run IO directly for every Telegram servers request, another one is based on TelegramClient which is just ReaderT.

Use `TelegramClient`

{-# LANGUAGE OverloadedStrings #-}

import           Network.HTTP.Client      (newManager)
import           Network.HTTP.Client.TLS  (tlsManagerSettings)
import           Web.Telegram.API.Bot

main :: IO ()
main = do
  let token = Token "bot<token>" -- entire Token should be bot123456:ABC-DEF1234ghIkl-zyx57W2v1u123ew11
  manager <- newManager tlsManagerSettings
  result <- runTelegramClient token manager $ do
    info <- getWebhookInfoM
    let request = setWebhookRequest' "https://example.com/hook"
    isSet <- setWebhookM request
    getMeM
  print result
  print "done!"

Running IO directly (planning to deprecate this option)

⚠️ This method to interact with a Telegram bot is about to be depricated and all new API calls will only have their M versions. You can run them using runTelegramClient function, for example runTelegramClient token manager $ sendMessageM message or in example below replace getMe token manager with runTelegramClient token manager getMeM to get the same behavior.

getMe example

{-# LANGUAGE OverloadedStrings #-}

import           Network.HTTP.Client      (newManager)
import           Network.HTTP.Client.TLS  (tlsManagerSettings)
import           Web.Telegram.API.Bot

main :: IO ()
main = do
  manager <- newManager tlsManagerSettings
  res <- getMe token manager
  case res of
    Left e -> do
      putStrLn "Request failed"
      print e
    Right Response { result = u } -> do
      putStrLn "Request succeded"
      print $ user_first_name u
  where token = Token "bot<token>" -- entire Token should be bot123456:ABC-DEF1234ghIkl-zyx57W2v1u123ew11

sendMessage example

{-# LANGUAGE OverloadedStrings #-}

import           Network.HTTP.Client      (newManager)
import           Network.HTTP.Client.TLS  (tlsManagerSettings)
import           Web.Telegram.API.Bot

main :: IO ()
main = do
  manager <- newManager tlsManagerSettings
  let request = sendMessageRequest chatId message
  res <- sendMessage token request manager
  case res of
    Left e -> do
      putStrLn "Request failed"
      print e
    Right Response { result = m } -> do
      putStrLn "Request succeded"
      print $ message_id m
      print $ text m
  where token = Token "bot<token>" -- entire Token should be bot123456:ABC-DEF1234ghIkl-zyx57W2v1u123ew11
        chatId = ChatId <chat_id> -- use ChatId 10231 or ChatChannel "<@channelusername>"
        message = "text *bold* _italic_ [github](github.com/klappvisor/haskell-telegram-api)"

Note on requests:

Many request data records have a lot of optional parameters which are usually redundant. There are two ways to create requests:

With data type constructor:

let request = SendMessageRequest (ChatId int64_chatId) "text" Nothing (Just True) Nothing Nothing Nothing

Using default instance:

let request = sendMessageRequest (ChatId int64_chatId) "text" -- only with required fields

let request = (sendMessageRequest ChatId int64_chatId) "text") {
  message_disable_notification = Just True -- with optional fields
}

Contribution

Contributions are welcome!

Fork repository
Do some changes
Create pull request
Wait for CI build and review
??????
PROFIT

Bear in mind that the CI build won't run integration test suite against your pull request since the necessary environment variables ($BOT_TOKEN, $STRIPE_TOKEN, $CHAT_ID and $BOT_NAME) aren't exported when a fork starts the build (for security reasons). If you do want to run them before creating RP, you can setup integration of your fork with CircleCI.

You can use stack to build project

stack build

To run test you have to create your own bot. Go to BotFather and create the bot. As the result you will have private bot's access token. Keep it safe!

stack test --test-arguments "--integration -c CHAT_ID -b BOT_NAME -- HSPEC_ARGS"

where

BOT_TOKEN is the token obtained from BotFather and must be defined as environment variable
PAYMENT_TOKEN is the token obtained from BotFather and must be defined as environment variable
CHAT_ID can be id of your chat with your bot. Send some messages to this chat in Telegram and do curl "https://api.telegram.org/bot<replace_with_token>/getUpdates", you'll have to parse some JSON with your brain ;-) or any other suitable tool and you will find chat id there.
BOT_NAME is the name of your bot
HSPEC_ARGS are the normal hspec arguments you can find here

The help option is available for the tests and for hspec:

stack test --test-arguments "-h"
stack test --test-arguments "--integration -c CHAT_ID -b BOT_NAME -- -h"

Note: Inline Spec is disabled for now...

If everything is fine after running the tests you will receive a few new messages from your bot.