#!/bin/sh
# pa_exifautotran [list of files]
#
# Transforms JPEG files so that Exif Orientation becomes 1
#
# blatant copy of exitautotran shell script with:
# Minor change made to ignore failure of jpegtran (it was failing
# b/c Samsung images are incomplete, but the rotation works)
for i
do
  case $i in
    -v|--version) echo "$0 (pa variant)"; exit 0;;
    -h|--help) 
      cat <<EOF
$0 [list of files]
Transforms JPEG files so that Exif Orientation becomes 1
EOF
    exit 0;;
  esac

	case $(jpegexiforient "$i") in
    1) transform="";;
    2) transform="-flip horizontal";;
    3) transform="-rotate 180";;
    4) transform="-flip vertical";;
    5) transform="-transpose";;
    6) transform="-rotate 90";;
    7) transform="-transverse";;
    8) transform="-rotate 270";;
    *) transform="";;
  esac

  if test -n "$transform"; then
    echo Executing: jpegtran -copy all $transform "$i" >&2
    jpegtran -copy all $transform "$i" > tempfile 2> err
    ret=$?
    err=`cat err`
    if [ "$ret" = "2" ] && [ "$err" != "Invalid SOS parameters for sequential JPEG" ]; then
        echo "$0: FAILED to rotate jpeg with unknown failure - dont change file"
        rm err
        rm tempfile
        exit 1
    fi
    # last sanity check - make sure tempfile is not empty 
    if [ -s tempfile ]; then
        rm err
        mv tempfile "$i"
        jpegexiforient -1 "$i" > /dev/null
    else
        cat err
        rm err
        rm tempfile
    fi
  fi
done