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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)
(use data-structures)
(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 (required optional)
((wrap-api-method method
(required required_params ...)
(optional optional_params ...))
(define (method token
#!key required_params ...
optional_params ...)
(if (any (lambda (x) (equal? #f x))
(list required_params ...))
(abort 'required-parameter-missing)
(with-input-from-request
(get-query-url token (symbol->string 'method))
(clean-query-parameters
(map (lambda (l) (cons (first l) (second l)))
(zip '(required_params ... optional_params ...)
(list required_params ... optional_params ...))))
read-json))))))
(wrap-api-method getMe (required) (optional))
(wrap-api-method getUpdates
(required)
(optional offset
limit
timeout))
(wrap-api-method sendMessage
(required chat_id
text)
(optional parse_mode
disable_web_page_preview
disable_notification
reply_to_message_id
reply_markup))
(wrap-api-method forwardMessage
(required chat_id
from_chat_id
message_id)
(optional disable_notification))
(wrap-api-method sendPhoto
(required chat_id
photo)
(optional caption
disable_notification
reply_to_message_id
reply_markup))
(wrap-api-method sendAudio
(required chat_id
audio)
(optional duration
performer
title
disable_notification
reply_to_message_id
reply_markup))
(wrap-api-method sendDocument
(required chat_id
document)
(optional caption
disable_notification
reply_to_message_id
reply_markup))
(wrap-api-method sendSticker
(required chat_id
sticker)
(optional disable_notification
reply_to_message_id
reply_markup))
(wrap-api-method sendVideo
(required chat_id
video)
(optional duration
width
height
caption
disable_notification
reply_to_message_id
reply_markup))
(wrap-api-method sendVoice
(required chat_id
voice)
(optional duration
disable_notification
reply_to_message_id
reply_markup))
(wrap-api-method sendLocation
(required chat_id
latitude
longitude)
(optional disable_notification
reply_to_message_id
reply_markup))
(wrap-api-method sendChatAction
(required chat_id
action)
(optional))
(wrap-api-method getUserProfilePhotos
(required user_id)
(optional offset
limit))
(wrap-api-method getFile
(required file_id)
(optional))
;;; framework
(define (pollUpdates token handler)
(let ((offset 0))
(do-forever
(vector-for-each (lambda (i u)
(handler u)
(set! offset (+ 1 (alist-ref 'update_id u))))
(alist-ref 'result
(getUpdates token
offset: offset
timeout: 60))))))
)
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