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;;; -*- lexical-binding: t; -*-
(require 'dash)
(require 'dash-functional)
(require 'request)
;;;
;;; Configuration
;;;
(defvar slack/token nil
"Legacy (https://api.slack.com/custom-integrations/legacy-tokens) access token")
(defvar slack/include-public-channels 't
"Whether or not to inclue public channels in the list of conversations")
(defvar slack/include-private-channels 't
"Whether or not to inclue public channels in the list of conversations")
(defvar slack/include-im 't
"Whether or not to inclue IMs (private messages) in the list of conversations")
(defvar slack/include-mpim nil
"Whether or not to inclue multi-person IMs (multi-person private messages) in
the list of conversations")
;;;
;;; Utilities
;;;
(defmacro comment (&rest _body)
"Comment out one or more s-expressions"
nil)
(defun ->list (vec) (append vec nil))
(defun json-truthy? (x) (and x (not (equal :json-false x))))
;;;
;;; Generic API integration
;;;
(defvar slack/base-url "https://slack.com/api")
(defun slack/get (path params &optional callback)
"params is an alist of query parameters"
(let* ((params-callback (if (functionp params) `(() . ,params) (cons params callback)))
(params (car params-callback)) (callback (cdr params-callback))
(params (append `(("token" . ,slack/token)) params))
(url (concat (file-name-as-directory slack/base-url) path)))
(request url
:type "GET"
:params params
:parser 'json-read
:success (cl-function
(lambda (&key data &allow-other-keys)
(funcall callback data))))))
(defun slack/post (path params &optional callback)
(let* ((params-callback (if (functionp params) `(() . ,params) (cons params callback)))
(params (car params-callback)) (callback (cdr params-callback))
(url (concat (file-name-as-directory slack/base-url) path)))
(request url
:type "POST"
:data (json-encode params)
:headers `(("Content-Type" . "application/json")
("Authorization" . ,(format "Bearer %s" slack/token)))
:success (cl-function
(lambda (&key data &allow-other-keys)
(funcall callback data))))))
;;;
;;; Specific API endpoints
;;;
;; Users
(defun slack/users (cb)
"Returns users as (id . name) pairs"
(slack/get
"users.list"
(lambda (data)
(->> data
(assoc-default 'members)
->list
(-map (lambda (user)
(cons (assoc-default 'id user)
(assoc-default 'real_name user))))
(-filter #'cdr)
(funcall cb)))))
(comment
(slack/get
"users.list"
(lambda (data) (setq response-data data)))
(slack/users (lambda (data) (setq --users data)))
)
;; Conversations
(defun slack/conversation-types ()
(->>
(list (when slack/include-public-channels "public_channel")
(when slack/include-private-channels "private_channel")
(when slack/include-im "im")
(when slack/include-mpim "mpim"))
(-filter #'identity)
(s-join ",")))
(defun channel-label (chan users-alist)
(cond
((json-truthy? (assoc-default 'is_channel chan))
(format "#%s" (assoc-default 'name chan)))
((json-truthy? (assoc-default 'is_im chan))
(let ((user-id (assoc-default 'user chan)))
(format "Private message with %s" (assoc-default user-id users-alist))))
((json-truthy? (assoc-default 'is_mpim chan))
(->> chan
(assoc-default 'purpose)
(assoc-default 'value)))))
(defun slack/conversations (cb)
"Calls `cb' with (id . '((label . \"label\") '(topic . \"topic\") '(purpose . \"purpose\"))) pairs"
(slack/get
"conversations.list"
`(("types" . ,(slack/conversation-types))
("exclude-archived" . "true"))
(lambda (data)
(setq --data data)
(slack/users
(lambda (users)
(->> data
(assoc-default 'channels)
->list
(-map
(lambda (chan)
(cons (assoc-default 'id chan)
`((label . ,(channel-label chan users))
(topic . ,(->> chan
(assoc-default 'topic)
(assoc-default 'value)))
(purpose . ,(->> chan
(assoc-default 'purpose)
(assoc-default 'value)))))))
(funcall cb)))))))
(comment
(slack/get
"conversations.list"
'(("types" . "public_channel,private_channel,im,mpim"))
(lambda (data) (setq response-data data)))
(slack/get
"conversations.list"
'(("types" . "im"))
(lambda (data) (setq response-data data)))
(slack/conversations
(lambda (convos) (setq --conversations convos)))
)
;; Messages
(cl-defun slack/post-message
(&key text channel-id (on-success #'identity))
(slack/post "chat.postMessage"
`((text . ,text)
(channel . ,channel-id)
(as_user . t))
on-success))
(comment
(slack/post-message
:text "hi slackbot"
:channel-id slackbot-channel-id
:on-success (lambda (data) (setq resp data)))
)
;;;
;;; Posting code snippets to slack
;;;
(defun prompt-for-channel (cb)
(slack/conversations
(lambda (conversations)
(ivy-read
"Select channel: "
;; TODO want to potentially use purpose / topic stuff here
(->> conversations
(-filter (lambda (c) (assoc-default 'label (cdr c))))
(-map (lambda (chan) (let ((label (assoc-default 'label (cdr chan)))
(id (car chan)))
(propertize label 'channel-id id)))))
:history 'slack/channel-history
:action (lambda (selected)
(let ((channel-id (get-text-property 0 'channel-id selected)))
(funcall cb channel-id)
(message "Sent message to %s" selected))))))
nil)
(comment
(prompt-for-channel #'message)
(->> --convos
(-filter (lambda (c) (assoc-default 'label (cdr c))))
(-map (lambda (chan) (let ((label (assoc-default 'label (cdr chan)))
(id (car chan)))
(propertize label 'channel-id id)))))
(->> --convos (car) (cdr) (assoc-default 'label))
)
(defun slack-send-code-snippet (&optional snippet-text)
(interactive
(list (buffer-substring-no-properties (mark) (point))))
(prompt-for-channel
(lambda (channel-id)
(slack/post-message
:text (format "```\n%s```" snippet-text)
:channel-id channel-id))))
(provide 'slack-snippets)
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