#!/usr/bin/php
<?php

/*  PEL: PHP Exif Library.  A library with support for reading and
 *  writing all Exif headers in JPEG and TIFF images using PHP.
 *
 *  Copyright (C) 2004, 2005, 2006  Martin Geisler.
 *
 *  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 in the file COPYING; if not, write to the
 *  Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
 *  Boston, MA 02110-1301 USA
 */

/* $Id: rename.php 432 2006-09-05 22:13:00Z mgeisler $ */

/* An example of how PEL can be used.  The script will read the Exif
 * timestamps in the files given, and rename the files based on that.
 * Should there be several files with the same timestamp --- the
 * resolution of the Exif timestamp is one second, so a burst of
 * images will typically have identical timestamps --- then the next
 * available time will be used. */

error_reporting(E_ALL);

/* a printf() variant that appends a newline to the output. */
function println(/* fmt, args... */) {
    $args = func_get_args();
    $fmt = array_shift($args);
    vprintf($fmt . "\n", $args);
}


/* Make PEL speak the users language, if it is available. */
setlocale(LC_ALL, '');

/* Load the required class definitions. */
require_once(dirname(__FILE__) . '/../PelDataWindow.php');
require_once(dirname(__FILE__) . '/../PelJpeg.php');
require_once(dirname(__FILE__) . '/../PelTiff.php');

$prog = array_shift($argv);
$error = false;

/* Accept the optional -d command line argument. */
if (isset($argv[0]) && $argv[0] == '-d') {
  Pel::$debug = true;
  array_shift($argv);
}

/* Print usage information if there are no more command line
 * arguments. */
if (empty($argv)) {
  println('Usage: %s [-d] <file> ...', $prog);
  println('Optional arguments:');
  println('  -d        turn debug output on.');
  println('Mandatory arguments:');
  println('  file ...  one or more file names.');
  println();
  println('The files will be renamed based on their Exif timestamp.');
  exit(1);
}

/* We typically need lots of RAM to parse TIFF images since they tend
 * to be big and uncompressed. */
ini_set('memory_limit', '32M');

foreach ($argv as $file) {

  println('Reading file "%s".', $file);
  $data = new PelDataWindow(file_get_contents($file));

  if (PelJpeg::isValid($data)) {
    $jpeg = new PelJpeg();
    $jpeg->load($data);
    $app1 = $jpeg->getExif();
    $tiff = $app1->getTiff();
  } elseif (PelTiff::isValid($data)) {
    $tiff = new PelTiff($data);
  } else {
    println('Unrecognized image format! Skipping.');
    continue;
  }
  
  $ifd0 = $tiff->getIfd();
  $entry = $ifd0->getEntry(PelTag::DATE_TIME);

  if ($entry == null) {
    println('Skipping %s because no DATE_TIME tag was found.', $file);
    continue;
  }

  
  $time = $entry->getValue();
  
  do {
    $new = gmdate('Y:m:d-H:i:s', $time) . strchr($file, '.');
    println('Trying file name %s', $new);
    $time++;
  } while (file_exists($new));
  
  rename($file, $new);
}


?>