configuration.nix/bin/bingwp

#!/usr/bin/env bash

bg_dir="$(xdg-user-dir "PICTURES")/bg"
img_file="$bg_dir/$(date +%Y-%m-%d).png"
mkdir -p "$bg_dir"

isNew() {
  if (( 10 <= 10#$(date +%H) )) && [[ ! -e "$img_file" ]]; then
    return 0
  elif [ ! -s "$img_file" ]; then
    img_file="$bg_dir/$(date -d 'now - 1 days' +%Y-%m-%d).png"
    return 1
  else
    return 1
  fi
}

fetch() {
  img_url="$(curl "https://www.bing.com/HPImageArchive.aspx?format=js&n=1" | jq ".images[0].url" | sed "s/\"//g" | awk '{printf "https://bing.com%s", $1 }')"
  curl "$img_url" > "$img_file"
}

isNew && fetch

swaybg -i "$img_file"