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Added a (very rudimentary) script to find new images from a dump

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Michiel Sikma 2014-12-22 17:32:30 +01:00
parent fadcdbe11e
commit eb14ad32ed
1 changed files with 98 additions and 0 deletions
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scripts/find_new_images.php Executable file
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#!/usr/bin/env php
<?php
# find_new_images.php: used to crawl through the images from a dump and the
# already existing images to find out which ones are new.
#
# This script takes two directories, `old' and `new' (in that order), and then
# compares every file from `old' to every file in `new'. It's therefore very
# slow. This is used whenever there's a new image dump from a Pokémon cartridge
# to see which icons are new and which ones are already present in the current
# version of Pokésprite.
#
# This script requires libpuzzle to be compiled and present.
# See <https://github.com/jedisct1/libpuzzle> for more information.
$verbose = false;
$dir_old = @$argv[1];
$dir_new = @$argv[2];
$GLOBALS['file_exts'] = array('jpg', 'png', 'jpeg', 'gif');
if (!isset($dir_old) || !isset($dir_new)) {
print('usage: find_new_images.php old_dir new_dir'.PHP_EOL.'find_new_images.php: error: too few arguments'.PHP_EOL);
exit();
}
if (!is_dir($dir_old) || !is_dir($dir_new)) {
print('usage: find_new_images.php old_dir new_dir'.PHP_EOL.'find_new_images.php: error: old_dir or new_dir aren\'t directories'.PHP_EOL);
exit();
}
$imgs_old = iterate_dir($dir_old);
$imgs_new = iterate_dir($dir_new);
$unique_new_imgs = array();
print('old: `'.$dir_old.'\' contains '.count($imgs_old).' image files.'.PHP_EOL);
print('new: `'.$dir_new.'\' contains '.count($imgs_new).' image files.'.PHP_EOL);
if ($verbose) {
print(PHP_EOL);
}
foreach ($imgs_new as $img_new_path => $img_new_info) {
foreach ($imgs_old as $img_old_path => $img_old_info) {
$diff = get_img_diff($img_new_path, $img_old_path);
if ($verbose) {
print('comparing: '.$img_new_path.' to '.$img_old_path.': diff: '.$diff.PHP_EOL);
}
if ($diff < 0.01) {
// Found duplicate. We're looking for images that do not have duplicates.
continue(2);
}
}
$unique_new_imgs[$img_new_path] = $img_new_info;
}
print(PHP_EOL.'Amount of unique images found: '.count($unique_new_imgs).PHP_EOL.PHP_EOL);
foreach ($unique_new_imgs as $path => $img) {
print(' '.$path.PHP_EOL);
}
print(PHP_EOL);
function iterate_dir($dir)
{
$stack = array();
try {
$dir_it = new \DirectoryIterator($dir);
} catch (Exception $e) {
print('error: can\'t open dir: '.$dir);
continue;
}
foreach ($dir_it as $file) {
// Some checks to ensure it's a valid image.
if ($file->isDot()) {
continue;
}
if ($file->isDir()) {
$dir_stack = iterate_dir($dir.'/'.$file->getFilename());
$stack = array_merge($dir_stack, $stack);
continue;
}
$fn = $file->getFilename();
$fn_bits = explode('.', $fn);
$fn_ext = strtolower(trim(end($fn_bits)));
$file_path = $dir.'/'.$fn;
if (!in_array($fn_ext, $GLOBALS['file_exts'])) {
continue;
}
$stack[$file_path] = true;
}
return $stack;
}
function get_img_diff($new, $old)
{
$diff = trim(exec('puzzle-diff '.$new.' '.$old));
return floatval($diff);
}