atfbooru_can_handle() {
  local url="${1}"
  echo "${url}" | grep -qi 'booru.allthefallen.moe/posts/[0-9]*' || return 1
  taggery_id_filter=atfbooru_id_filter
  taggery_fmturl="https://booru.allthefallen.moe/posts/%s"
  taggery_image_url_filter=atfbooru_image_url_filter
  taggery_image_tags_filter=atfbooru_image_tags_filter
}
atfbooru_id_filter() {
  sed -e 's#^.*/posts/\([0-9]\+\)\($\|/.*$\)#\1#'
}
atfbooru_image_url_filter() {
  sed -e '/Size: /!d; s/^.*<a //i; s/^.*href="\([^"]*\)".*$/\1/i'
}
atfbooru_image_tags_filter() {
  sed -e '/class="search-tag"/!d; s/<\/li>/&\n/g' | sed -e '/class="search-tag/!d; s/\([^?]\)<\/a>.*$/\1/; s/^.*>//; s/ /_/g'
}