158 lines
4.1 KiB
PHP
158 lines
4.1 KiB
PHP
<?php
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include_once __DIR__ . "/logging.php";
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include_once __DIR__ . "/cors.php";
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cors();
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$config_data = get_config();
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define("ROOT_URL", $config_data["ROOT_URL"]);
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define("ROOT_DIR", $config_data["ROOT_DIR"]);
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define("IMG_DIR", $config_data["IMG_DIR"]);
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define("THUMBNAIL_DIR", $config_data["THUMBNAIL_DIR"]);
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define("THUMBNAIL_SCRIPT", __DIR__ . "/../scripts/resize-img");
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define("IMAGE_EXTENSIONS", [
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'jpg',
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'jpeg',
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'png',
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'gif',
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'tiff',
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'bmp',
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'webp',
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'svg',
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]);
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define("VIDEO_EXTENSIONS", [
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'mp4',
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]);
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define("FILE_EXTENSIONS", array_merge(IMAGE_EXTENSIONS, VIDEO_EXTENSIONS));
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function main(): void {
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$data = json_decode(file_get_contents('php://input'), true);
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$array = [];
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$category = $data["category"];
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$directory = ROOT_DIR.IMG_DIR.$category;
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if (!is_dir($directory)) goto encode;
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foreach (scandir($directory) as $file) {
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if ($file === ".") continue;
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if ($category === "" && $file === "..") continue;
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if (substr($file, 0, 1) === "." && $file !== "..") continue;
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$path = add_seperator_ab("/", $category, $file);
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$is_dir = is_dir(ROOT_DIR.IMG_DIR.$path);
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if (!$is_dir && !is_valid_file_type($file)) continue;
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$url = ROOT_URL.IMG_DIR.$path;
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$thumbnail_url = null;
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if (!$is_dir) {
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$thumbnail_url = create_thumbnail($category, $file);
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}
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$file_item = [];
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$file_item["is_dir"] = $is_dir;
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$file_item["url"] = $url;
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$file_item["thumbnail_url"] = $thumbnail_url;
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array_push($array, $file_item);
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}
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encode:
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echo json_encode($array);
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}
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function create_thumbnail(string $category, string $file): string | null {
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if (!is_image_file_type($file)) return null;
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$path = add_seperator_ab("/", $category, $file);
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$original_file = ROOT_DIR.IMG_DIR.$path;
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# use fast hashing algo, see: https://github.com/Cyan4973/xxHash
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$hash = hash_file("xxh3", $original_file);
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$thumbnail_directory = ROOT_DIR.THUMBNAIL_DIR;
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$thumbnail_name = "$hash.jpg";
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$thumbnail_file = $thumbnail_directory.$thumbnail_name;
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if (file_exists($thumbnail_file)) {
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log_print("thumbnail for $original_file exists, skipping generation");
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goto return_thumbnail;
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}
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try {
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if (!is_dir($thumbnail_directory)) mkdir($thumbnail_directory, 0777, true);
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}
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catch(Exception $e) {
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log_error($e->getMessage());
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}
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log_print("generating thumbnail for $original_file");
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$output = shell_exec(THUMBNAIL_SCRIPT." '$original_file' '$thumbnail_file' 2>&1");
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if ($output) log_print($output);
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if (substr_count(strtolower((string) $output), "error")) {
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log_error("Thumbnail failed");
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log_print(ROOT_URL.IMG_DIR.$path);
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return ROOT_URL.IMG_DIR.$path;
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}
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return_thumbnail:
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return ROOT_URL.THUMBNAIL_DIR.$thumbnail_name;
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}
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function add_seperator_ab(string $separator, string $a, string $b): string {
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if ($a === "") return $b;
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return $a.$separator.$b;
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}
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function is_valid_file_type(string $filename): bool {
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foreach (FILE_EXTENSIONS as $file_extension) {
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if (str_ends_with($filename, $file_extension)) return true;
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}
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return false;
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}
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function is_image_file_type(string $filename): bool {
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foreach(IMAGE_EXTENSIONS as $file_extension) {
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if(str_ends_with($filename, $file_extension)) return true;
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}
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return false;
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}
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function get_config(): array {
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$config_data = file_exists(__DIR__ . "/../config.json") ?
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json_decode(file_get_contents(__DIR__ . "/../config.json"), true) : null;
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if (!is_valid_config_data($config_data)) {
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log_error("Config invalid, falling back to default. Please check config.json");
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$config_data = json_decode(file_get_contents(__DIR__ . "/../config.default.json"), true);
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if (!is_valid_config_data($config_data))
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log_error("Default config invalid. Please check or create config.json");
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}
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return $config_data;
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}
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function is_valid_config_data(?array $data): bool {
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if (!$data) return false;
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$keys = ["ROOT_URL", "ROOT_DIR", "IMG_DIR", "THUMBNAIL_DIR"];
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foreach ($keys as $key) {
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if (!isset($data[$key])) return false;
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switch ($key) {
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case "ROOT_URL":
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case "THUMBNAIL_DIR":
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break;
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case "ROOT_DIR":
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if (!is_dir($data[$key])) return false;
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break;
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case "IMG_DIR":
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if (!is_dir($data["ROOT_DIR"].$data[$key])) return false;
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break;
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}
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}
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return true;
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}
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main();
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?>
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