(in-package :slacker)
(defmethod attach-module ((event-pump event-pump) module &rest args &key)
(setf (gethash (make-keyword module)
(modules event-pump))
(apply #'make-instance
module
args)))
(defvar *api-token*)
(defun make-client (event-pump)
(flet ((get-ws-url (slack-response)
(gethash "url" slack-response)))
(fw.lu:let-each (:be slack-data)
(format nil "https://slack.com/api/rtm.start?token=~a" *api-token*)
(drakma:http-request slack-data :want-stream t)
(yason:parse slack-data)
(let* ((url (get-ws-url slack-data))
(self (gethash "self" slack-data))
(users (gethash "users" slack-data))
(client (wsd:make-client url)))
(declare (ignorable self users))
(wsd:on :message client
(lambda (message)
(chanl:send (result-queue event-pump)
message)))
client))))
(defgeneric send-message (client type &key)
(:documentation "Send a slack message")
(:method :around ((client event-pump) _type &key)
(declare (ignorable client _type))
(let ((result (call-next-method)))
(values result
(wsd:send (ws-client client)
(with-output-to-string (s)
(yason:encode result s)))))))
(defgeneric start-module (client module)
(:documentation "start a module"))
(defun start-client (&key modules)
(let* ((event-pump (make-instance 'event-pump))
(client (make-client event-pump)))
(setf (ws-client event-pump)
client)
(values event-pump
(bt:make-thread
(lambda ()
(loop for (module . args) in modules
do (start-module event-pump
(apply #'attach-module
event-pump module args)))
(as:with-event-loop ()
(websocket-driver:start-connection client)
(as:with-interval (15)
(send-message event-pump :ping))
(as:with-interval (0.01)
(multiple-value-bind (message message-p)
(chanl:recv (work-queue event-pump)
:blockp nil)
(when message-p
(format t "Got a message")
(funcall message
event-pump)))
:event-cb (lambda (ev)
(format t "~&EVENT: ~a~%" ev)))))
:name "Event Server"))))
(defmethod get-event-nonblocking ((event-pump event-pump) &key (object-as :hash-table))
(multiple-value-bind (message message-p) (chanl:recv (result-queue event-pump) :blockp nil)
(values (when message-p
(yason:parse message :object-as object-as))
message-p)))
(defmethod get-event ((event-pump event-pump) &key (object-as :hash-table))
(multiple-value-bind (message message-p) (chanl:recv (result-queue event-pump))
(values (when message-p
(yason:parse message :object-as object-as))
message-p)))
(defun event-loop (event-pump)
(loop with message with message-p
do (multiple-value-setq (message message-p) (get-event event-pump))
when message-p do
(let ((type (gethash "type" message))
(reply (gethash "reply_to" message)))
(cond (type (string-case (gethash "type" message)
("message" (format t "~&MSG: <~a/~a> ~a~%"
(gethash "channel" message)
(gethash "user" message)
(gethash "text" message))
(when-let* ((msg (gethash "text" message))
(parsed-message (tokens msg))
(ts (gethash "ts" message))
(channel (gethash "channel" message)))
(when (eql #\; (elt msg 0))
(handle-command event-pump ts channel
(car parsed-message)
(cdr parsed-message)))))
(t (fresh-line)
(yason:encode message)
(terpri))))
(reply )))
do (sleep 0.01)))
(defun coordinate-threads ()
(let* ((event-pump (start-client :modules '((hhgbot-augmented-assistant::js-executor)))))
(bt:make-thread (lambda () (event-loop event-pump))
:name "Event Loop")
event-pump))
(defparameter *command-table* (make-hash-table :test 'equal))
(defun quote-output (str)
(with-output-to-string (s)
(format s "```~%~a```~%" str)))
(defmacro in-wq ((client-sym) &body body)
`(let ((promise (blackbird-base:make-promise)))
(values promise
(chanl:send (work-queue ,client-sym)
(lambda (,client-sym)
(declare (ignorable ,client-sym))
(let ((result (progn ,@body)))
(blackbird-base:finish promise result)
result))))))
(define-modify-macro aconsf (key datum)
(lambda (alist key datum)
(acons key datum alist)))
(defmethod send-message ((client event-pump) (type (eql :ping)) &key data)
(let* ((id (incf (latest-id client)))
(message `(("id" . ,id)
("type" . "ping"))))
(when data
(aconsf message "data" data))
(incf (waiting-pings client))
(alist-hash-table message
:test 'equal)))
(defmethod send-message ((client event-pump) (type (eql :message)) &key channel data)
(let* ((id (incf (latest-id client)))
(message `(("id" . ,id)
("type" . "message")
("channel" . ,channel)
("text" . ,data))))
(alist-hash-table message
:test 'equal)))
(defun queue-message (event-pump channel message &key quote)
(let ((message (if quote (quote-output message)
message)))
(in-wq (event-pump)
(send-message event-pump :message
:channel channel
:data message))))
(define-condition command-error () ())
(define-condition unsupported-args (command-error) ())
(defmacro define-command (name (event-pump ts channel &rest args) &body body)
(let* ((command-sym (intern (string-upcase name)))
(has-rest (position '&rest args))
(rest-sym (gensym "rest"))
(args (if has-rest
args
(append args `(&rest ,rest-sym)))))
`(progn
(defun ,command-sym (,event-pump ,ts ,channel ,@args)
(declare (ignorable event-pump ts ,@(when (not has-rest) `(,rest-sym))))
,@body)
(setf (gethash ,name *command-table*) (function ,command-sym)))))
(defun safe-apply (func event-pump ts channel args)
(with-simple-restart (continue "Skip command")
(apply func event-pump ts channel args)))
(defun handle-command (event-pump ts channel command args)
(declare (ignorable args))
(let* ((command (subseq (plump:decode-entities command) 1))
(handler (gethash command *command-table*)))
(print (hash-table-alist *command-table*))
(terpri)
(print command)
(if handler
(safe-apply handler event-pump ts channel args)
(queue-message event-pump channel (concat "I don't understand the command `" command "`.")))))
(defun slack-api-call (method &rest args)
(bb:with-promise (resolve reject)
(bt:make-thread
(lambda ()
(handler-case
(let ((api-result (yason:parse
(babel:octets-to-string
(drakma:http-request (concat "https://slack.com/api/" method "?token=" *api-token*)
:method :post
:content (quri:url-encode-params
(loop for (key value) on args by #'cddr
collect (cons (string-downcase key) value)))
:proxy (list "127.0.0.1" 8080))))))
;todo error handling . . .
(resolve api-result))
(t (c) (reject c)))))))
(defgeneric api-call (name args)
(:method ((name symbol) (args list))
(slack-api-call ,)))
(defmacro define-api-wrapper (name required-args &rest args)
(flet ((name-case (string)
(let ((parts (split-sequence #\- (string-downcase string))))
(apply #'concatenate 'string
(car parts)
(mapcar #'string-capitalize (cdr parts))))))
(let* ((api-method-name (name-case name)))
`(progn (defun ,name (,@required-args &rest r &key ,@args)
(apply #'slack-api-call ,api-method-name
,@(loop for req-arg in required-args
append (list (make-keyword req-arg) req-arg))
r))
(eval-when (:compile-toplevel :load-toplevel :execute)
(let ((*package* 'slacker.api))
(import ',name)
(export ',name)))))))
(defmacro define-api-wrappers (&body body)
`(progn ,@(loop for (name required-args . rest) in body
collect `(define-api-wrapper ,name ,required-args ,@rest))))
(defun edit-message (ts channel text)
(babel:octets-to-string
(drakma:http-request "https://slack.com/api/chat.update"
:method :post
:content (concat "token=" *api-token*
"&channel=" channel
"&ts=" ts
"&text=" text))))
(defmacro with-output-to-message ((stream event-pump channel &key quote) &body body)
(once-only (event-pump channel quote)
`(queue-message ,event-pump ,channel
(with-output-to-string (,stream)
,@body)
:quote ,quote)))
(define-command "help" (event-pump ts channel)
(let ((*print-right-margin* (max (or *print-right-margin* 0)
80)))
(with-output-to-message (s event-pump channel)
(format s "I understand these commands:~%~{`~a`~^ ~}"
(hash-table-keys *command-table*))
:quote t)))
(defparameter *id* 0)
(defun make-message (data channel)
(incf *id*)
(with-output-to-string (s)
(yason:encode
(alist-hash-table
`(("id" . ,*id*)
("type" . "message")
("channel" . ,channel)
("text" . ,data)))
s)))
(in-package :slacker.api)
(slacker::define-api-wrappers
(chat.delete (ts channel) as_user)
(chat.me-message (channel text))
(chat.post-message (channel text) parse link_name attachments unfurl_links unfurl_media username as_user icon_uri icon_emoji)
(chat.update (ts channel text) attachments parse link_names as_user))