#!/bin/sh

DBFILE=~/.config/darktable/library.db
TMPFILE=`mktemp -t tmp.XXXXXXXXXX`
QUERY="select A.id,B.folder,A.filename from images as A join film_rolls as B on A.film_id = B.id"
sqlite3 $DBFILE "$QUERY" > $TMPFILE
cat $TMPFILE | while read result
do
  ID=$(echo "$result" | cut -f1 -d"|")
  FD=$(echo "$result" | cut -f2 -d"|")
  FL=$(echo "$result" | cut -f3 -d"|")
  if ! [ -f "$FD/$FL" ];
  then
    echo "removing non existent file $FD/$FL with ID = $ID"

    for table in images meta_data; do
      sqlite3 "$DBFILE" "delete from $table where id=$ID"
    done

    for table in color_labels history mask selected_images tagged_images; do
      sqlite3 "$DBFILE" "delete from $table where imgid=$ID"
    done

  fi
done
rm $TMPFILE

# delete now-empty filmrolls
sqlite3 "$DBFILE" "DELETE FROM film_rolls WHERE (SELECT COUNT(A.id) FROM images AS A WHERE A.film_id=film_rolls.id)=0"