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<?php
require_once DIR_SYSTEM . 'journal2/lib/SmushIt.php';
class Journal2ImageOptimiser {
public static function getAllImages() {
$iterator = new RecursiveIteratorIterator(new RecursiveDirectoryIterator(DIR_IMAGE . 'cache'), RecursiveIteratorIterator::CHILD_FIRST);
$files = array();
$size = 0;
foreach ($iterator as $path) {
if ($path->isFile()) {
$filename = $path->__toString();
if (in_array(mb_strtolower(pathinfo($filename, PATHINFO_EXTENSION)), array('jpeg', 'jpg', 'png'))) {
$filesize = filesize($filename);
$size += $filesize;
$files[] = array(
'name' => $filename,
'size' => $filesize
);
}
}
}
return array(
'total' => $size,
'files' => $files
);
}
public static function getOptimisedImages() {
$cached_file = DIR_IMAGE . 'cache/cached.dat';
if (!file_exists($cached_file)) {
return array(
'total' => 0,
'files' => array()
);
}
$size = 0;
$files = explode(PHP_EOL, file_get_contents($cached_file));
foreach ($files as $key => $file) {
if (!file_exists($file)) {
unset($files[$key]);
} else {
$size += filesize($file);
}
}
file_put_contents($cached_file, implode(PHP_EOL, $files) . (count($files) ? PHP_EOL : ''));
return array(
'total' => $size,
'files' => $files
);
}
public static function setOptimisedImages($images) {
$cached_file = DIR_IMAGE . 'cache/cached.dat';
$lines = '';
foreach ($images as $image) {
$lines .= $image . PHP_EOL;
}
file_put_contents($cached_file, $lines, FILE_APPEND);
}
public static function clearOptimisedImages() {
$cached_file = DIR_IMAGE . 'cache/cached.dat';
if (file_exists($cached_file)) {
unlink($cached_file);
}
}
public static function getStatus() {
$all_images = self::getAllImages();
$optimised_images = self::getOptimisedImages();
$optimised_images = $optimised_images['files'];
$current = count($optimised_images);
$total = count($all_images['files']);
$percent = self::percent($current, $total);
return array(
'optimised' => $current,
'total' => $total,
'percent' => $percent
);
}
public static function optimise($all = false) {
/* clear cache if all parameter is true */
if ($all) {
self::clearOptimisedImages();
}
/* get all files */
$all_images = self::getAllImages();
$all_files = $all_images['files'];
$total_size = $all_images['total'];
/* get already optimised files */
$optimised_images = self::getOptimisedImages();
$optimised_files = $optimised_images['files'];
$current_size = $optimised_images['total'];
$optimised = count($optimised_files);
/* exclude already optimised images */
foreach ($all_files as $key => $file) {
if (in_array($file['name'], $optimised_files)) {
unset($all_files[$key]);
}
}
/* make array chunks */
$all_files = array_chunk($all_files, defined('JOURNAL_SMUSH_BATCH_SIZE') ? JOURNAL_SMUSH_BATCH_SIZE : 1);
/* optimise process */
foreach ($all_files as $files) {
try {
$start = microtime(true);
$batch = array();
$batch_size = 0;
foreach ($files as $file) {
$batch[] = $file['name'];
$batch_size += $file['size'];
}
$current_size += $batch_size;
$percent = self::percent($current_size, $total_size);
$smushit = new SmushIt($batch);
foreach($smushit->get() as $file) {
$file = $file[0];
$src = pathinfo($file->source, PATHINFO_EXTENSION);
$dst = pathinfo($file->destination, PATHINFO_EXTENSION);
if ($src === $dst) {
copy($file->destination, $file->source);
}
}
self::setOptimisedImages($batch);
$optimised++;
$stop = microtime(true);
self::send(array('percent' => $percent, 'time' => $stop - $start, 'all' => $all, 'optimised' => $optimised, 'total' => count($all_images['files'])));
} catch (Exception $e) {
self::send(array('error' => $e->getMessage()));
}
}
}
public static function send($message) {
echo "data: " . json_encode($message) . PHP_EOL;
echo PHP_EOL;
ob_flush();
flush();
}
private static function percent($current, $total) {
if ((float)$current <= 0 || (float)$total <= 0) {
return 0;
}
return round ($current / $total * 10000) / 100;
}
}