#!/bin/bash
# Sort pictures by date
#
# filename list working file

#if [ -z "$1" ] 
#  then
#    echo usage: SoPi picturedirectory
#    exit
#fi

FN_List="SoPiList.out"
EXIF_List="SoPiEXIF.out"
Sorted_EXIF_List="SoPiEXIFS.out"
PictureList="PictureList.txt"
Pic_PATH=${1:-"Fotos"}"/"
echo $Pic_PATH
#Pic_PATH="$1/"

# make sure file PictureList does not exist! To avoid overwriting existing data
if [ -s "$PictureList" ] 
  then
    echo ***Error: File $PictureList already exists
    exit
fi

# List all pictures in the current directory and sub-directories
echo Finding files...
find "$Pic_PATH" -type f > "$FN_List"

# read this file and add EXIF data
echo Finding EXIF data...
while read filename
do
# 							grep the line that contains the date the picture was taken, ignore error messages
####  EXIF_Value=`exif -t DateTimeOriginal "$filename" 2>/dev/null | grep -H --label="$filename" Value`
  EXIF_Value=`exiv2 -g Exif.Photo.DateTimeOriginal -Pv print "$filename" 2>/dev/null`
# stat uses "-" in the date, exiv2 ":"
  EXIF_Value=`echo $EXIF_Value | sed -e {s/:/-/} -e {s/:/-/}`
# 							if no picture date available use last modification date of file
  if [ -z "$EXIF_Value" ] 
    then
      EXIF_Value=`stat --printf="%y" "$filename"`
  fi
  echo -e \""$filename"\" \"$EXIF_Value\" >> $EXIF_List
done < "$FN_List"

# 							sort by date, ignore separation characters in date (":" for EXIF, "-" for stat)
echo Sorting filenames by date, then filename...
sort --field-separator=" " --key=2 -d -o $Sorted_EXIF_List $EXIF_List

echo Creating file $PictureList ...
echo 'var pictureString = (` \' > "$PictureList"
mawk -F\" '{printf "<figure><img src=\"%s\" /><figcaption>%s</figcaption></figure>\n", $2, $4}' $Sorted_EXIF_List >> "$PictureList"
echo '`);' >> "$PictureList"

echo cleaning up ...
rm -f $EXIF_List
rm -f $FN_List
rm -f $Sorted_EXIF_List

echo ...done
exit