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(module telebot (getMe
getUpdates
sendMessage
forwardMessage
sendPhoto
sendAudio
sendDocument
sendSticker
sendVideo
sendVoice
sendLocation
sendChatAction
getUserProfilePhotos
getFile
pollUpdates)
(import chicken scheme)
(use srfi-1)
(use openssl)
(use http-client)
(use medea)
(use loops)
(use vector-lib)
(define-constant api-base "https://api.telegram.org/bot")
;;; helper functions
(define (get-query-url token method)
(string-append api-base token "/" method))
(define (clean-query-parameters parameters)
(let ((cleaned-parameters (remove (lambda (p) (equal? #f (cdr p)))
parameters)))
(if (null-list? cleaned-parameters)
#f
cleaned-parameters)))
;;; plain API wrappers, returning deserialized JSON
(define-syntax wrap-api-method
(syntax-rules ()
((wrap-api-method method(parameters ...))
(define (method
token
#!key parameters ...)
(with-input-from-request
(get-query-url token (symbol->string 'method))
(clean-query-parameters
(map (lambda (l) (cons (first l) (second l)))
(zip '(parameters ...)
(list parameters ...))))
read-json)))))
(wrap-api-method getMe())
(wrap-api-method getUpdates(offset limit timeout))
(wrap-api-method sendMessage(chat_id
text
parse_mode
disable_web_page_preview
disable_notification
reply_to_message_id
reply_markup))
(wrap-api-method forwardMessage(chat_id
from_chat_id
message_id
disable_notification))
(wrap-api-method sendPhoto(chat_id
photo
caption
disable_notification
reply_to_message_id
reply_markup))
(wrap-api-method sendAudio(chat_id
audio
duration
performer
title
disable_notification
reply_to_message_id
reply_markup))
(wrap-api-method sendDocument(chat_id
document
caption
disable_notification
reply_to_message_id
reply_markup))
(wrap-api-method sendSticker(chat_id
sticker
disable_notification
reply_to_message_id
reply_markup))
(wrap-api-method sendVideo(chat_id
video
duration
width
height
caption
disable_notification
reply_to_message_id
reply_markup))
(wrap-api-method sendVoice(chat_id
voice
duration
disable_notification
reply_to_message_id
reply_markup))
(wrap-api-method sendLocation(chat_id
latitude
longitude
disable_notification
reply_to_message_id
reply_markup))
(wrap-api-method sendChatAction(chat_id action))
(wrap-api-method getUserProfilePhotos(user_id
offset
limit))
(wrap-api-method getFile(file_id))
;;; framework
(define (pollUpdates token handler)
(define offset 0)
(define process (lambda (i u)
(begin (handler u)
(set! offset (+ 1 (cdr (assv 'update_id u)))))))
(do-forever
(vector-for-each process
(cdr (assv 'result (getUpdates token
offset: offset
timeout: 60))))))
)
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