120 lines
4.0 KiB
PHP
120 lines
4.0 KiB
PHP
<?php
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class Cache {
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public static function getCacheFile(string $name, $maxAge = 3600) {
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$cacheFile = CACHE_DIR . "/" . $name;
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if (file_exists($cacheFile) && filemtime($cacheFile) > time() - $maxAge) {
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Logger::log("Cache hit for " . $name, Logger::IOREAD, "Cache");
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return COMPRESS_LOCAL_CACHE ? gzuncompress(file_get_contents($cacheFile)) : file_get_contents($cacheFile);
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}
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return null;
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}
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public static function saveCacheFile(string $name, string $data) {
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$cacheFile = CACHE_DIR . "/" . $name;
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file_put_contents($cacheFile, COMPRESS_LOCAL_CACHE ? gzcompress($data,9) : $data );
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Logger::log("Saved cache file " . $name, Logger::IOWRITE, "Cache");
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}
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public static function publicCacheExists(string $name, bool $skipExtensionCheck = false) {
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// For now cache is not reliable since we use a generated name.
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return false;
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/*if (!$skipExtensionCheck) {
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$ext = substr($name, strrpos($name, ".") + 1);
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if (strtolower($ext) == "jpg" || strtolower($ext) == "jpeg" || strtolower($ext) == "png") {
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$name = str_replace("." . $ext, ".webp", strtolower($name));
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}
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}
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$cacheFile = PUBLIC_CACHE_DIR . "/" . $name;
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try {
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$fe = file_exists($cacheFile);
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} catch (Exception $e) {
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$fe = false;
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Logger::log("Could not check if public cache file " . $name . " exists: " . $e->getMessage(), Logger::ERROR, "Cache");
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}
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return $fe;*/
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}
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public static function savePublicCacheFile(string $name, string $data, int $cacheLevel = 70, bool $skipExtensionCheck = false) {
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$name = strtolower($name);
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$ext = substr($name, strrpos($name, ".") + 1);
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if ($skipExtensionCheck || strtolower($ext) == "jpg" || strtolower($ext) == "jpeg" || strtolower($ext) == "png") {
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$size = strlen($data);
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$img = new Imagick();
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$img->readImageBlob($data);
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$img->setImageFormat('webp');
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$img->setImageCompressionQuality($cacheLevel);
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$img->stripImage();
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$data = $img->getImageBlob();
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$name = str_replace("." . $ext, ".webp", strtolower($name));
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$cacheFile = PUBLIC_CACHE_DIR . "/" . $name;
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$blurhash = self::generateBlurHash($cacheFile, $img, $skipExtensionCheck);
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if (!empty($blurhash)) {
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$name = "BH-" . bin2hex($blurhash) . "-W" . $img->getImageWidth() . "xH" . $img->getImageHeight() . ".webp";
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$cacheFile = PUBLIC_CACHE_DIR . "/" . $name;
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}
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// For now don't transfer file if its generated name exists
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if (file_exists($cacheFile)) {
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Logger::log("Public cache file " . $name . " already exists", Logger::INFO, "Cache");
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return PUBLIC_CACHE_URL . "/" . $name;
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}
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Logger::log("Compressed image from " . $size . " to " . strlen($data) . " bytes", Logger::METRICS, "Cache");
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}
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$context = stream_context_create([
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's3' => [
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'ACL' => 'public-read'
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]
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]);
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file_put_contents($cacheFile, $data, 0, $context);
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Logger::log("Saved public cache file " . $name, Logger::IOWRITE, "Cache");
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return PUBLIC_CACHE_URL . "/" . $name;
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}
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public static function generateBlurHash(string $cacheFile, ?IMagick $img = null, bool $skipExtensionCheck = false):?string {
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$ext = substr($cacheFile, strrpos($cacheFile, ".") + 1);
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if ($skipExtensionCheck || strtolower($ext) == "jpg" || strtolower($ext) == "jpeg" || strtolower($ext) == "png" || strtolower($ext) == "webp") {
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$hashFile = strtolower($cacheFile);
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$hashFileName = substr($hashFile, strrpos($hashFile, "/") + 1);
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if (file_exists($hashFile)) {
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return null;
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}
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$pixels = [];
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if ($img === null) {
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$img = new Imagick();
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$img->readImage($cacheFile);
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}
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$width = $img->getImageWidth();
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$height = $img->getImageHeight();
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for ($y = 0; $y < $height; $y++) {
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$row = [];
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for ($x = 0; $x < $width; $x++) {
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$pixel = $img->getImagePixelColor($x, $y);
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$color = $pixel->getColor();
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$row[] = [$color["r"], $color["g"], $color["b"]];
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}
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$pixels[] = $row;
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}
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$hash = \kornrunner\Blurhash\Blurhash::encode($pixels, BLURHASH_X, BLURHASH_Y);
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return $hash;
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}
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}
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} |