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org-ai-openai-image.el
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;;; org-ai-openai-image.el --- DALL-E / image generation -*- lexical-binding: t; -*-
;; This file is NOT part of GNU Emacs.
;; org-ai.el 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.
;; org-ai.el 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 org-ai.el.
;; If not, see <https://www.gnu.org/licenses/>.
;;; Commentary:
;; DALL-E / image generation
;;; Code:
(require 'org-ai-openai)
(defcustom org-ai-image-directory (expand-file-name "org-ai-images/" org-directory)
"Directory where images are stored."
:group 'org-ai
:type 'directory)
(defvar org-ai-openai-image-generation-endpoint "http://137.184.178.157:8080/v1/images/generations")
(defvar org-ai-openai-image-variation-endpoint "http://137.184.178.157:8080/v1/images/variations")
(defun org-ai--image-save-base64-payload (base64-string file-name)
"Write the base64 encoded payload `BASE64-STRING' to `FILE-NAME'."
(with-temp-file file-name
(insert (base64-decode-string base64-string))))
(defun org-ai--images-save (data size &optional prompt)
"Save the image `DATA' to into a file. Use `SIZE' to determine the file name.
Also save the `PROMPT' to a file."
(make-directory org-ai-image-directory t)
(cl-loop for ea across (alist-get 'data data)
collect (let ((file-name (org-ai--make-up-new-image-file-name org-ai-image-directory size)))
(when prompt (with-temp-file (string-replace ".png" ".txt" file-name) (insert prompt)))
(org-ai--image-save-base64-payload (alist-get 'b64_json ea) file-name)
file-name)))
(defun org-ai--make-up-new-image-file-name (dir size &optional n)
"Make up a new file name for an image. Use `DIR' as the directory.
Use `SIZE' to determine the file name. If `N' is given, append it
to the file name."
(let ((file-name (format "%s_%s_image%s.png"
(format-time-string "%Y%m%d" (current-time))
size
(if n (format "_%s" n) ""))))
(if (file-exists-p (expand-file-name file-name dir))
(org-ai--make-up-new-image-file-name dir size (1+ (or n 0)))
(expand-file-name file-name dir))))
(cl-defun org-ai--image-request (prompt &optional &key n size callback)
"Generate an image with `PROMPT'. Use `SIZE' to determine the size of the image.
`N' specifies the number of images to generate. If `CALLBACK' is
given, call it with the file name of the image as argument."
(unless org-ai-openai-api-token
(error "Please set `org-ai-openai-api-token' to your OpenAI API token"))
(let* ((token org-ai-openai-api-token)
(url-request-extra-headers `(("Authorization" . ,(string-join `("Bearer" ,token) " "))
("Content-Type" . "application/json")))
(url-request-method "POST")
(endpoint org-ai-openai-image-generation-endpoint)
(n (or n 1))
(size (or size "256x256"))
(response-format "b64_json")
(url-request-data (json-encode (map-filter (lambda (x _) x)
`((prompt . ,prompt)
(n . ,n)
(response_format . ,response-format)
(size . ,size))))))
(url-retrieve
endpoint
(lambda (_events)
(when (and (boundp 'url-http-end-of-headers) url-http-end-of-headers)
(goto-char url-http-end-of-headers)
(let ((files (org-ai--images-save (json-read) size prompt)))
(when callback
(cl-loop for file in files
for i from 0
do (funcall callback file i)))))))))
(defun org-ai-create-and-embed-image (context)
"Create an image with the prompt from the current block.
Embed the image in the current buffer. `CONTEXT' is the context
object."
(let* ((prompt (encode-coding-string (org-ai-get-block-content context) 'utf-8))
(info (org-ai-get-block-info context))
(size (or (alist-get :size info) "256x256"))
(n (or (alist-get :n info) 1))
(buffer (current-buffer)))
(org-ai--image-request prompt
:n n
:size size
:callback (lambda (file i)
(message "saved %s" file)
(with-current-buffer buffer
(save-excursion
(let ((name (plist-get (cadr (org-ai-special-block)) :name))
(contents-end (plist-get (cadr (org-ai-special-block)) :contents-end)))
(goto-char contents-end)
(forward-line)
(when name
(insert (format "#+NAME: %s%s\n" name (if (> n 0) (format "_%s" i) "") )))
(insert (format "[[file:%s]]\n" file))
(org-display-inline-images))))))))
;; -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
;; image variation
(defun org-ai-image-variation (path n size)
"Generate `N' variations of the image at point (a link pointing to a file).
Use `SIZE' to determine the size of the image. `PATH' is the path
to the image."
(interactive (list (let ((at-point (org-ai--image-variation--get-path-of-link-at-point))) (read-file-name "image: " nil at-point nil at-point))
(read-number "n: " 1)
(completing-read "size: " '("256x256" "512x512" "1024x1024") nil t "256x256" nil "256x256")))
(let ((buffer (current-buffer)))
(org-ai--image-variation-request path
:n n
:size size
:callback (lambda (file _i)
(message "saved %s" file)
(with-current-buffer buffer
(save-excursion
(move-end-of-line 1)
(insert (format "\n\n[[file:%s]]\n" file))
(org-display-inline-images)))))))
(cl-defun org-ai--image-variation-request (image-file-path &key n size callback)
"Generate an image similar to `IMAGE-FILE-PATH'.
Use `SIZE' to determine the size of the image. `N' specifies the
number of images to generate. If `CALLBACK' is given, call it
with the file name of the image as argument. Note this requries
curl to be installed."
(unless org-ai-openai-api-token
(error "Please set `org-ai-openai-api-token' to your OpenAI API token"))
(unless (executable-find "curl")
(error "Unable to find curl"))
(let ((command (format "curl --silent %s \\
-H 'Authorization: Bearer %s' \\
-F image='@%s' \\
-F n=%s \\
-F size=\"%s\" \\
-F response_format=\"b64_json\""
org-ai-openai-image-variation-endpoint
org-ai-openai-api-token
image-file-path
n
size)))
(with-temp-buffer
(condition-case err
(progn (shell-command command (current-buffer))
(goto-char (point-min))
(let ((data (json-read)))
(if (alist-get 'error data)
(error (alist-get 'error data))
(let ((files (org-ai--images-save data size)))
(when callback
(cl-loop for file in files
for i from 0
do (funcall callback file i)))))))
(error (let ((buffer-content (buffer-string))
(error-buffer (get-buffer-create "*org-ai-image-variation-error*")))
(with-current-buffer error-buffer
(erase-buffer)
(insert buffer-content))
(pop-to-buffer error-buffer))
(error err))))))
(defun org-ai-open-account-usage-page ()
"Open web browser with the OpenAI account usage page.
So you now how deep you're in the rabbit hole."
(interactive)
(browse-url "https://platform.openai.com/account/usage"))
(defun org-ai--image-variation--get-path-of-link-at-point ()
"Read the path of the link at point.
Return nil if there is no link at point."
(let* ((context
;; Only consider supported types, even if they are not the
;; closest one.
(org-element-lineage (org-element-context) '(link) t)))
(when context
(org-element-property :path context))))
;; -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
(provide 'org-ai-openai-image)
;;; org-ai-openai-image.el ends here