; This file is GPL licensed, same as Emacs


; callback to rewrite image pat so emacs can show images inside blog post drafts.
(defun firehose/markdown-translate-image-path (path)
  "Translate /media/... image links to ../media/... relative to buffer."
  (message (concat "markdown translate image path called on " path))
  
  (if (string-prefix-p "/images" path)
      (concat "../../../static" path)))
  

; test
(message (firehose/markdown-translate-image-path "/images/bla"))

; monkey patch function to fix our filename
(defun markdown-display-inline-images ()
  "Add inline image overlays to image links in the buffer.
This can be toggled with `markdown-toggle-inline-images'
or \\[markdown-toggle-inline-images]."
  (interactive)
  (message "monkeypatched function called")
  (unless (display-images-p)
    (error "Cannot show images"))
  (save-excursion
    (save-restriction
      (widen)
      (goto-char (point-min))
      (while (re-search-forward markdown-regex-link-inline nil t)
        (let* ((start (match-beginning 0))
               (imagep (match-beginning 1))
               (end (match-end 0))
               (file (funcall markdown-translate-filename-function (match-string-no-properties 6))))
          (when (and imagep
                     (not (zerop (length file))))
            (unless (file-exists-p file)
              (let* ((download-file (funcall markdown-translate-filename-function file))
                     (valid-url (ignore-errors
                                  (member (downcase (url-type (url-generic-parse-url download-file)))
                                          markdown-remote-image-protocols))))
                (if (and markdown-display-remote-images valid-url)
                    (setq file (markdown--get-remote-image download-file))
                  (when (not valid-url)
                    ;; strip query parameter
                    (setq file (replace-regexp-in-string "?.+\\'" "" file))
                    (unless (file-exists-p file)
                      (setq file (url-unhex-string file)))))))
            (when (file-exists-p file)
              (let* ((abspath (if (file-name-absolute-p file)
                                  file
                                (concat default-directory file)))
                     (image
                      (cond ((and markdown-max-image-size
                                  (image-type-available-p 'imagemagick))
                             (create-image
                              abspath 'imagemagick nil
                              :max-width (car markdown-max-image-size)
                              :max-height (cdr markdown-max-image-size)))
                            (markdown-max-image-size
                             (create-image abspath nil nil
                                           :max-width (car markdown-max-image-size)
                                           :max-height (cdr markdown-max-image-size)))
                            (t (create-image abspath)))))
                (when image
                  (let ((ov (make-overlay start end)))
                    (overlay-put ov 'display image)
                    (overlay-put ov 'face 'default)
                    (push ov markdown-inline-image-overlays)))))))))))

; register hook
(setq markdown-translate-filename-function
                        #'firehose/markdown-translate-image-path)