safebooru_can_handle() {
  local url="${1}"
  echo "${url}" | grep -qi 'safebooru.org/.*id=[0-9]*' || return 1
  taggery_id_filter=safebooru_id_filter
  taggery_fmturl="http://safebooru.org/index.php?page=post&s=view&id=%s"
  taggery_image_url_filter=safebooru_image_url_filter
  taggery_image_tags_filter=safebooru_image_tags_filter
}
safebooru_id_filter() {
  sed -e 's#^.*id=\([0-9]\+\)\($\|&.*$\)#\1#'
}
safebooru_image_url_filter() {
  sed -e '/>Original image</!d; s/>Original image.*//i; s/^.*<a //i; s/^.*href[[:space:]]*="\([^"]*\)".*$/\1/i'
}
safebooru_image_tags_filter() {
  sed -e '/id="tag-sidebar"/,/<\/div/!d; s/<\/li>/&\n/gi' | sed -e 's/<\/a>.*$//; s/^.*>//; /^[[:space:]]*$/d; s/ /_/g'
}