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-2.0 API

Usage

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 GetMeResponse { user_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 MessageResponse { message_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 = "<chat_id> or <@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" "text" Nothing (Just True) Nothing Nothing Nothing

Using default instance:

let request = sendMessageRequest "chatId" "text" -- only with required fields

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

Contribution

Contributions are welcome!

1. Fork repository
2. Do some changes
3. Create pull request
4. Wait for CI build and review
5. ??????
6. 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, $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 -t BOT_TOKEN -c CHAT_ID -b BOT_NAME -- HSPEC_ARGS"

where

• BOT_TOKEN is the token obtained from BotFather
• 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 -t BOT_TOKEN -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.