#!/bin/sh

## @file
## @brief Sets file mtime to the Exif.Image.DateTime of the file
##
## $@ List of files to be processed
##
## Requires exiv2 or exiftool
##

if [ -z "$(command -v exiv2)" ]
then
	if [ -z "$(command -v exiftool)" ]
	then
		zenity --title="Geeqie exif datetime to file" --info --text="Neither exiv2 nor exiftran is installed" --icon=/usr/local/share/icons/hicolor/scalable/apps/geeqie.svg 2> /dev/null
		exit 1
	else
		use_exiv2=false
	fi
else
	use_exiv2=true
fi

if ! zenity --title="Geeqie - exif datetime to file" --question --text "Set file datetime (mtime) to  Exif.Image.DateTime\n\nContinue?" --icon=/usr/local/share/icons/hicolor/scalable/apps/geeqie.svg
then
	exit 0
fi

# exiv2 should be faster
if [ "$use_exiv2" = "true" ]
then
	while [ $# -gt 0 ]
	do
		if date_time=$(exiv2 -g Exif.Image.DateTime -Pv "$1" | head --lines=1)
		then
			y_m_d_h_m_s=$(echo "$date_time" | tr ' ' ':')
			y_m_d_h_m=$(echo "$y_m_d_h_m_s" | cut --delimiter ':' --fields '1 2 3 4 5' | tr --delete ':')
			s=$(echo "$y_m_d_h_m_s" | cut --delimiter ':' --fields '6')
			touch -m -t "$y_m_d_h_m.$s" "$1"
		else
			printf "Geeqie plugin exif-datetime-to-file -\nFile: %s does not have Exif.Image.DateTime\n" "$1"
		fi
		shift
	done
else
	while [ $# -gt 0 ]
	do
		if date_time=$(exiftool -t -createdate "$1")
		then
			y_m_d_h_m_s=$(echo "$date_time" | cut --characters '13-31' | tr ' ' ':')
			y_m_d_h_m=$(echo "$y_m_d_h_m_s" | cut --delimiter ':' --fields '1 2 3 4 5' | tr --delete ':')
			s=$(echo "$y_m_d_h_m_s" | cut --delimiter ':' --fields '6')
			touch -m -t "$y_m_d_h_m.$s" "$1"
		else
			printf "Geeqie plugin exif-datetime-to-file -\nFile: %s does not have Exif.Image.DateTime\n" "$1"
		fi
		shift
	done
fi
