Saving My Favourite Wallpapers

I am using the styli.sh script as my wallpaper changer in sway and with a little transparency and wallpapers from unsplash I can quickly switch randomly through my wallpaper images and get things looking pretty nice.

I tend to switch a few times before I find one that I like, but that image tends to disappear when I restart my laptop and the wallpaper gets reset. What I would like to do is to have the ability to send the current wallpaper to a wallpaper favourite folder to build up a chosen set of images.

The first step to achieving this would be to add a couple of lines to the styli.sh bash script to copy the current wallpaper image to a defined location. I am guessing that sway stores this image somewhere but as styli.sh handles all the variables and logic I might as well add in the following:

swaymsg output "*" bg "$WALLPAPER" "$MODE"
rm ~/wallpaper-faves*.{jpg,jpeg,png,gif}
cp "$WALLPAPER" ~/wallpaper-faves-${WALLPAPER##*/}

and now for some emacs elisp to move this wallpaper image into a favourite folder :

(defun my/copy-background-to-faves ()
  "Copy the current sway background to wallpaper faves folder"
  (interactive)
  (let* ((source-folder "/path/to/home/")
          (faves-folder "/path/to/wallpaper/faves/")
          (image-files (directory-files source-folder nil "^wallpaper-faves.*\\.\\(jpg\\|jpeg\\|png\\|gif\\)$" nil nil)))
    (dolist (image-file image-files)
      (rename-file (concat source-folder image-file) (concat faves-folder image-file) t)
      )
    )
  )

Now over time my faves-folder will build up with all my cherished wallpapers and I can begin the process again!