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slack-message-attachment-preview-buffer.el
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slack-message-attachment-preview-buffer.el
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;;; slack-message-attachment-preview-buffer.el --- -*- lexical-binding: t; -*-
;; Copyright (C) 2020
;; Author: <yuya373@archlinux>
;; Keywords:
;; This program is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with this program. If not, see <https://www.gnu.org/licenses/>.
;;; Commentary:
;;
;;; Code:
(require 'eieio)
(require 'slack-util)
(require 'slack-request)
(require 'slack-buffer)
(defconst slack-file-get-upload-url-url "https://slack.com/api/files.getUploadURL")
(defun slack-request-plain-parser ()
(buffer-substring-no-properties (point-min) (point-max)))
(defface slack-message-attachment-preview-header-face
'((t (:height 1.2 :weight bold :foreground "#2aa198")))
"Used to attachment preview header"
:group 'slack)
(defconst slack-max-message-attachment-count 10)
(defclass slack-message-compose-buffer-file ()
((path :initarg :path type string)
(filename :initarg :filename :type string)
(id :initarg :id :type (or null string) :initarg nil)))
(cl-defmethod slack--upload-file ((this slack-message-compose-buffer-file) team url cb)
(let ((path (oref this path)))
(cl-labels
((on-file-upload (&key data &allow-other-keys)
(slack-request-handle-error
(data "slack-upload-file")
(funcall cb t (oref this id))))
(on-error (&allow-other-keys)
(funcall cb nil)))
(slack-request
(slack-request-create
url
team
:type "POST"
:files (list (cons "file" path))
:parser #'slack-request-plain-parser
:headers (list (cons "Content-Type" "multipart/form-data"))
:timeout nil
:success #'on-file-upload
:error #'on-error)))))
(cl-defmethod slack-upload-file ((this slack-message-compose-buffer-file) team cb)
(let ((filename (oref this filename))
(path (oref this path)))
(cl-labels
((on-error (&allow-other-keys)
(funcall cb nil))
(on-get-upload-url (&key data &allow-other-keys)
(condition-case err-var
(slack-request-handle-error
(data "files.getUploadUrl"
(lambda (err)
(slack-log (format "Failed to get upload url of %s. %s" filename err)
team)
(funcall cb nil)))
(let ((url (plist-get data :upload_url))
(file-id (plist-get data :file)))
(oset this id file-id)
(slack--upload-file this team url cb)))
(progn
(slack-log (format "Failed to get upload url. Error: %s" err-var)
team)
(funcall cb nil)))))
(slack-request
(slack-request-create
slack-file-get-upload-url-url
team
:type "POST"
:params (list (cons "filename" filename)
(cons "length" (number-to-string (file-attribute-size (file-attributes path)))))
:headers (list (cons "Content-Type" "multipart/form-data"))
:success #'on-get-upload-url
:error #'on-error)))))
(define-derived-mode slack-message-attachment-preview-buffer-mode
fundamental-mode
"Slack Compose Message Attachment"
(setq-local buffer-read-only t))
(defclass slack-message-attachment-preview-buffer (slack-buffer)
((room-id :initarg :room-id :type string)
(files :initarg :files :type (or null list) :initform nil)))
(cl-defmethod slack-buffer-name ((this slack-message-attachment-preview-buffer))
(let ((team (slack-buffer-team this))
(room (slack-buffer-room this)))
(format "*Slack - %s : %s Compose Message Attachment"
(slack-team-name team)
(slack-room-name room team))))
(cl-defmethod slack-buffer-key ((_class (subclass slack-message-attachment-preview-buffer)) room)
(oref room id))
(cl-defmethod slack-buffer-key ((this slack-message-attachment-preview-buffer))
(slack-buffer-key 'slack-message-attachment-preview-buffer
(slack-buffer-room this)))
(cl-defmethod slack-team-buffer-key ((_class (subclass slack-message-attachment-preview-buffer)))
'slack-message-attachment-preview-buffer)
(cl-defmethod slack-buffer-init-buffer ((this slack-message-attachment-preview-buffer))
(let* ((buf (cl-call-next-method)))
(with-current-buffer buf
(slack-message-attachment-preview-buffer-mode)
(slack-buffer-set-current-buffer this))
buf))
(cl-defmethod slack-buffer-room ((this slack-message-attachment-preview-buffer))
(with-slots (room-id) this
(slack-room-find room-id (slack-buffer-team this))))
(cl-defmethod slack-buffer-insert-attachment-preview ((this slack-message-attachment-preview-buffer))
(let* ((buffer (slack-buffer-buffer this))
(cur-point (point)))
(with-current-buffer buffer
(setq-local slack-current-buffer this)
(save-excursion
(save-restriction
(let ((inhibit-read-only t))
(delete-region (point-min) (point-max)))
(goto-char (point-min))
(when (< 0 (length (oref this files)))
(let ((inhibit-read-only t)
(size 300))
(insert (propertize
(format "%s%s%s\n"
(propertize (format "Attachments (%s/%s)"
(length (oref this files))
slack-max-message-attachment-count)
'face '(slack-message-attachment-preview-header-face slack-preview-face))
(propertize "\n\n"
'face 'slack-preview-face)
(let ((result ""))
(cl-loop for file in (oref this files)
for i = 0 then (+ 1 i)
do (let ((s (format "%s%s%s"
(propertize "Remove"
'face 'slack-message-action-face
'slack-file-index i
'keymap (let ((map (make-sparse-keymap)))
(define-key map (kbd "RET") #'slack-message-remove-file)
map))
(propertize (format " %s" (oref file filename))
'face 'slack-preview-face)
(if (and slack-render-image-p
(ignore-errors (image-type (oref file path))))
(propertize (format "\n%s" (slack-mapconcat-images
(slack-image-slice
(slack-image--create (oref file path)
:max-height size))))
'face 'slack-preview-face)
""))))
(setq result (format "%s%s%s" result s (propertize "\n\n" 'face 'slack-preview-face)))))
result))
'read-only t))))))
(goto-char cur-point))
(funcall slack-buffer-function buffer)))
(cl-defmethod slack-buffer-append-file ((this slack-message-attachment-preview-buffer) path filename)
(if (<= slack-max-message-attachment-count
(length (oref this files)))
(message "You can add up to 10 files.")
(oset this files (append (oref this files)
(list (make-instance
'slack-message-compose-buffer-file
:path path
:filename filename))))
(slack-buffer-insert-attachment-preview this)))
(cl-defmethod slack-buffer-remove-file ((this slack-message-attachment-preview-buffer))
(let ((index (get-text-property (point) 'slack-file-index))
(new-files nil))
(when index
(cl-loop for file in (oref this files)
for i = 0 then (+ 1 i)
unless (eq index i)
do (push file new-files))
(oset this files (reverse new-files))
(slack-buffer-insert-attachment-preview this))))
(provide 'slack-message-attachment-preview-buffer)
;;; slack-message-attachment-preview-buffer.el ends here