#! /usr/bin/env python

"""
Renames images in a directory from native filename to name based on date and time of picture.

ver.: 20030807

Copyright (c) 2003 Jiri Baum

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

"""


# prejmenuje fotografie z fotoaparatu podle jejich data a casu

import sys, os, re, string

if len(sys.argv)>1:
    os.chdir(sys.argv[1])

for orig in os.listdir('.'):
    if not os.path.isfile(orig) or (not re.match('dscf0.*\.jpe?g', orig)
                      and not re.match('IMG_[0-9]+\.JPG', orig)
		      # Filipuv aparat je dscnNNNN.JPG:
		      and not re.match('dscn[0-9]+\.jpg', orig)
		      #  Panasonic NV-GS50 je imgaNNNN.jpg:
		      and not re.match('imga[0-9]+\.jpg', orig)):
        continue
    print orig, " -> ",
    f=os.popen("metacam "+orig)
    while 1:
        s=f.readline()
	if not len(s): break
	d=re.match('\s*Image Creation Date: (\d+):(\d+):(\d+) (\d+):(\d+):(\d+)\s*', s)
	if not d: continue
	base=d.group(1)+d.group(2)+d.group(3)+"_"+d.group(4)+d.group(5)+d.group(6)
	# Filipovi pridavat jeste -fz, aby se poznaly
	# base=d.group(1)+d.group(2)+d.group(3)+"_"+d.group(4)+d.group(5)+d.group(6)+"-fz"
	sfx=""
	if os.path.exists(base+".jpg"):
	    for sfx in [chr(x) for x in range(ord('a'), ord('z')+1)]:
	        if not os.path.exists(base+sfx+".jpg"):
		    break
	    else:
	        raise "prilis mnoho se stejnym datem"
	print base+sfx+".jpg"
	os.rename(orig, base+sfx+".jpg")
	break