821 lines
23 KiB
PHP
821 lines
23 KiB
PHP
<?php declare(strict_types=1);
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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *\
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* Things which should be in the core API *
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\* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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/**
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* Return the unique elements of an array, case insensitively
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*/
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function array_iunique(array $array): array
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{
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$ok = [];
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foreach ($array as $element) {
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$found = false;
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foreach ($ok as $existing) {
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if (strtolower($element) == strtolower($existing)) {
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$found = true;
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break;
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}
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}
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if (!$found) {
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$ok[] = $element;
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}
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}
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return $ok;
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}
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/**
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* Figure out if an IP is in a specified range
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*
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* from https://uk.php.net/network
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*/
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function ip_in_range(string $IP, string $CIDR): bool
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{
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list($net, $mask) = explode("/", $CIDR);
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$ip_net = ip2long($net);
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$ip_mask = ~((1 << (32 - $mask)) - 1);
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$ip_ip = ip2long($IP);
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$ip_ip_net = $ip_ip & $ip_mask;
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return ($ip_ip_net == $ip_net);
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}
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/**
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* Delete an entire file heirachy
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*
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* from a patch by Christian Walde; only intended for use in the
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* "extension manager" extension, but it seems to fit better here
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*/
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function deltree(string $f): void
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{
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//Because Windows (I know, bad excuse)
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if (PHP_OS === 'WINNT') {
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$real = realpath($f);
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$path = realpath('./').'\\'.str_replace('/', '\\', $f);
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if ($path != $real) {
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rmdir($path);
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} else {
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foreach (glob($f.'/*') as $sf) {
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if (is_dir($sf) && !is_link($sf)) {
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deltree($sf);
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} else {
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unlink($sf);
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}
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}
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rmdir($f);
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}
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} else {
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if (is_link($f)) {
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unlink($f);
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} elseif (is_dir($f)) {
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foreach (glob($f.'/*') as $sf) {
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if (is_dir($sf) && !is_link($sf)) {
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deltree($sf);
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} else {
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unlink($sf);
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}
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}
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rmdir($f);
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}
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}
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}
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/**
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* Copy an entire file hierarchy
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*
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* from a comment on https://uk.php.net/copy
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*/
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function full_copy(string $source, string $target): void
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{
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if (is_dir($source)) {
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@mkdir($target);
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$d = dir($source);
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while (false !== ($entry = $d->read())) {
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if ($entry == '.' || $entry == '..') {
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continue;
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}
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$Entry = $source . '/' . $entry;
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if (is_dir($Entry)) {
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full_copy($Entry, $target . '/' . $entry);
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continue;
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}
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copy($Entry, $target . '/' . $entry);
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}
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$d->close();
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} else {
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copy($source, $target);
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}
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}
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/**
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* Return a list of all the regular files in a directory and subdirectories
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*/
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function list_files(string $base, string $_sub_dir=""): array
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{
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assert(is_dir($base));
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$file_list = [];
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$files = [];
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$dir = opendir("$base/$_sub_dir");
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if ($dir===false) {
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throw new SCoreException("Unable to open directory $base/$_sub_dir");
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}
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try {
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while ($f = readdir($dir)) {
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$files[] = $f;
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}
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} finally {
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closedir($dir);
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}
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sort($files);
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foreach ($files as $filename) {
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$full_path = "$base/$_sub_dir/$filename";
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if (!is_link($full_path) && is_dir($full_path)) {
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if (!($filename == "." || $filename == "..")) {
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//subdirectory found
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$file_list = array_merge(
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$file_list,
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list_files($base, "$_sub_dir/$filename")
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);
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}
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} else {
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$full_path = str_replace("//", "/", $full_path);
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$file_list[] = $full_path;
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}
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}
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return $file_list;
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}
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function flush_output(): void
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{
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if (!defined("UNITTEST")) {
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@ob_flush();
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}
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flush();
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}
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function stream_file(string $file, int $start, int $end): void
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{
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$fp = fopen($file, 'r');
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try {
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set_time_limit(0);
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fseek($fp, $start);
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$buffer = 1024 * 1024;
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while (!feof($fp) && ($p = ftell($fp)) <= $end) {
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if ($p + $buffer > $end) {
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$buffer = $end - $p + 1;
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}
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echo fread($fp, $buffer);
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flush_output();
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// After flush, we can tell if the client browser has disconnected.
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// This means we can start sending a large file, and if we detect they disappeared
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// then we can just stop and not waste any more resources or bandwidth.
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if (connection_status() != 0) {
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break;
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}
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}
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} finally {
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fclose($fp);
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}
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}
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# http://www.php.net/manual/en/function.http-parse-headers.php#112917
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if (!function_exists('http_parse_headers')) {
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/**
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* #return string[]
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*/
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function http_parse_headers(string $raw_headers): array
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{
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$headers = []; // $headers = [];
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foreach (explode("\n", $raw_headers) as $i => $h) {
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$h = explode(':', $h, 2);
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if (isset($h[1])) {
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if (!isset($headers[$h[0]])) {
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$headers[$h[0]] = trim($h[1]);
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} elseif (is_array($headers[$h[0]])) {
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$tmp = array_merge($headers[$h[0]], [trim($h[1])]);
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$headers[$h[0]] = $tmp;
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} else {
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$tmp = array_merge([$headers[$h[0]]], [trim($h[1])]);
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$headers[$h[0]] = $tmp;
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}
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}
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}
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return $headers;
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}
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}
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/**
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* HTTP Headers can sometimes be lowercase which will cause issues.
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* In cases like these, we need to make sure to check for them if the camelcase version does not exist.
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*/
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function find_header(array $headers, string $name): ?string
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{
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if (!is_array($headers)) {
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return null;
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}
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$header = null;
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if (array_key_exists($name, $headers)) {
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$header = $headers[$name];
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} else {
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$headers = array_change_key_case($headers); // convert all to lower case.
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$lc_name = strtolower($name);
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if (array_key_exists($lc_name, $headers)) {
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$header = $headers[$lc_name];
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}
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}
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return $header;
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}
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if (!function_exists('mb_strlen')) {
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// TODO: we should warn the admin that they are missing multibyte support
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/** @noinspection PhpUnusedParameterInspection */
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function mb_strlen($str, $encoding): int
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{
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return strlen($str);
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}
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function mb_internal_encoding($encoding): void
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{
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}
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function mb_strtolower($str): string
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{
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return strtolower($str);
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}
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}
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/** @noinspection PhpUnhandledExceptionInspection */
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function get_subclasses_of(string $parent): array
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{
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$result = [];
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foreach (get_declared_classes() as $class) {
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$rclass = new ReflectionClass($class);
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if (!$rclass->isAbstract() && is_subclass_of($class, $parent)) {
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$result[] = $class;
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}
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}
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return $result;
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}
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/**
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* Like glob, with support for matching very long patterns with braces.
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*/
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function zglob(string $pattern): array
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{
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$results = [];
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if (preg_match('/(.*)\{(.*)\}(.*)/', $pattern, $matches)) {
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$braced = explode(",", $matches[2]);
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foreach ($braced as $b) {
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$sub_pattern = $matches[1].$b.$matches[3];
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$results = array_merge($results, zglob($sub_pattern));
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}
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return $results;
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} else {
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$r = glob($pattern);
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if ($r) {
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return $r;
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} else {
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return [];
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}
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}
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}
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/**
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* Figure out the path to the shimmie install directory.
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*
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* eg if shimmie is visible at https://foo.com/gallery, this
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* function should return /gallery
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*
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* PHP really, really sucks.
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*/
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function get_base_href(): string
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{
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if (defined("BASE_HREF") && !empty(BASE_HREF)) {
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return BASE_HREF;
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}
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$possible_vars = ['SCRIPT_NAME', 'PHP_SELF', 'PATH_INFO', 'ORIG_PATH_INFO'];
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$ok_var = null;
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foreach ($possible_vars as $var) {
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if (isset($_SERVER[$var]) && substr($_SERVER[$var], -4) === '.php') {
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$ok_var = $_SERVER[$var];
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break;
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}
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}
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assert(!empty($ok_var));
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$dir = dirname($ok_var);
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$dir = str_replace("\\", "/", $dir);
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$dir = str_replace("//", "/", $dir);
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$dir = rtrim($dir, "/");
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return $dir;
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}
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/**
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* The opposite of the standard library's parse_url
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*/
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function unparse_url(array $parsed_url): string
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{
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$scheme = isset($parsed_url['scheme']) ? $parsed_url['scheme'] . '://' : '';
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$host = isset($parsed_url['host']) ? $parsed_url['host'] : '';
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$port = isset($parsed_url['port']) ? ':' . $parsed_url['port'] : '';
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$user = isset($parsed_url['user']) ? $parsed_url['user'] : '';
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$pass = isset($parsed_url['pass']) ? ':' . $parsed_url['pass'] : '';
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$pass = ($user || $pass) ? "$pass@" : '';
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$path = isset($parsed_url['path']) ? $parsed_url['path'] : '';
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$query = !empty($parsed_url['query']) ? '?' . $parsed_url['query'] : '';
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$fragment = !empty($parsed_url['fragment']) ? '#' . $parsed_url['fragment'] : '';
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return "$scheme$user$pass$host$port$path$query$fragment";
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}
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# finally in the core library starting from php8
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if (!function_exists('str_starts_with')) {
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function str_starts_with(string $haystack, string $needle): bool
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{
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return strncmp($haystack, $needle, strlen($needle)) === 0;
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}
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}
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if (!function_exists('str_ends_with')) {
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function str_ends_with(string $haystack, string $needle): bool
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{
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return $needle === '' || $needle === substr($haystack, - strlen($needle));
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}
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}
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if (!function_exists('str_contains')) {
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function str_contains(string $haystack, string $needle): bool
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{
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return '' === $needle || false !== strpos($haystack, $needle);
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}
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}
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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *\
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* Input / Output Sanitising *
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\* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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/**
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* Make some data safe for printing into HTML
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*/
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function html_escape(?string $input): string
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{
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if (is_null($input)) {
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return "";
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}
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return htmlentities($input, ENT_QUOTES, "UTF-8");
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}
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/**
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* Unescape data that was made safe for printing into HTML
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*/
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function html_unescape(string $input): string
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{
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return html_entity_decode($input, ENT_QUOTES, "UTF-8");
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}
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/**
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* Make sure some data is safe to be used in integer context
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*/
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function int_escape(?string $input): int
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{
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/*
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Side note, Casting to an integer is FASTER than using intval.
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http://hakre.wordpress.com/2010/05/13/php-casting-vs-intval/
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*/
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if (is_null($input)) {
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return 0;
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}
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return (int)$input;
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}
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/**
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* Make sure some data is safe to be used in URL context
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*/
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function url_escape(?string $input): string
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{
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if (is_null($input)) {
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return "";
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}
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$input = rawurlencode($input);
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return $input;
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}
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/**
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* Turn all manner of HTML / INI / JS / DB booleans into a PHP one
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*/
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function bool_escape($input): bool
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{
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/*
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Sometimes, I don't like PHP -- this, is one of those times...
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"a boolean FALSE is not considered a valid boolean value by this function."
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Yay for Got'chas!
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https://php.net/manual/en/filter.filters.validate.php
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*/
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if (is_bool($input)) {
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return $input;
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} elseif (is_int($input)) {
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return ($input === 1);
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} else {
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$value = filter_var($input, FILTER_VALIDATE_BOOLEAN, FILTER_NULL_ON_FAILURE);
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if (!is_null($value)) {
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return $value;
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} else {
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$input = strtolower(trim($input));
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return (
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$input === "y" ||
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$input === "yes" ||
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$input === "t" ||
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$input === "true" ||
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$input === "on" ||
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$input === "1"
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);
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}
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}
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}
|
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|
|
/**
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* Some functions require a callback function for escaping,
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* but we might not want to alter the data
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*/
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|
function no_escape(string $input): string
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{
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return $input;
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}
|
|
|
|
/**
|
|
* Given a 1-indexed numeric-ish thing, return a zero-indexed
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* number between 0 and $max
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|
*/
|
|
function page_number(string $input, ?int $max=null): int
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|
{
|
|
if (!is_numeric($input)) {
|
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$pageNumber = 0;
|
|
} elseif ($input <= 0) {
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$pageNumber = 0;
|
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} elseif (!is_null($max) && $input >= $max) {
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$pageNumber = $max - 1;
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|
} else {
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|
$pageNumber = $input - 1;
|
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}
|
|
return $pageNumber;
|
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}
|
|
|
|
function clamp(?int $val, ?int $min=null, ?int $max=null): int
|
|
{
|
|
if (!is_numeric($val) || (!is_null($min) && $val < $min)) {
|
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$val = $min;
|
|
}
|
|
if (!is_null($max) && $val > $max) {
|
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$val = $max;
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|
}
|
|
if (!is_null($min) && !is_null($max)) {
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assert($val >= $min && $val <= $max, "$min <= $val <= $max");
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|
}
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|
return $val;
|
|
}
|
|
|
|
/**
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|
* Original PHP code by Chirp Internet: www.chirp.com.au
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|
* Please acknowledge use of this code by including this header.
|
|
*/
|
|
function truncate(string $string, int $limit, string $break=" ", string $pad="..."): string
|
|
{
|
|
// return with no change if string is shorter than $limit
|
|
if (strlen($string) <= $limit) {
|
|
return $string;
|
|
}
|
|
|
|
// is $break present between $limit and the end of the string?
|
|
if (false !== ($breakpoint = strpos($string, $break, $limit))) {
|
|
if ($breakpoint < strlen($string) - 1) {
|
|
$string = substr($string, 0, $breakpoint) . $pad;
|
|
}
|
|
}
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|
|
|
return $string;
|
|
}
|
|
|
|
/**
|
|
* Turn a human readable filesize into an integer, eg 1KB -> 1024
|
|
*/
|
|
function parse_shorthand_int(string $limit): int
|
|
{
|
|
if (preg_match('/^([\d\.]+)([tgmk])?b?$/i', (string)$limit, $m)) {
|
|
$value = $m[1];
|
|
if (isset($m[2])) {
|
|
switch (strtolower($m[2])) {
|
|
/** @noinspection PhpMissingBreakStatementInspection */
|
|
case 't': $value *= 1024; // fall through
|
|
/** @noinspection PhpMissingBreakStatementInspection */
|
|
// no break
|
|
case 'g': $value *= 1024; // fall through
|
|
/** @noinspection PhpMissingBreakStatementInspection */
|
|
// no break
|
|
case 'm': $value *= 1024; // fall through
|
|
// no break
|
|
case 'k': $value *= 1024; break;
|
|
default: $value = -1;
|
|
}
|
|
}
|
|
return (int)$value;
|
|
} else {
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Turn an integer into a human readable filesize, eg 1024 -> 1KB
|
|
*/
|
|
function to_shorthand_int(int $int): string
|
|
{
|
|
assert($int >= 0);
|
|
|
|
if ($int >= pow(1024, 4)) {
|
|
return sprintf("%.1fTB", $int / pow(1024, 4));
|
|
} elseif ($int >= pow(1024, 3)) {
|
|
return sprintf("%.1fGB", $int / pow(1024, 3));
|
|
} elseif ($int >= pow(1024, 2)) {
|
|
return sprintf("%.1fMB", $int / pow(1024, 2));
|
|
} elseif ($int >= 1024) {
|
|
return sprintf("%.1fKB", $int / 1024);
|
|
} else {
|
|
return (string)$int;
|
|
}
|
|
}
|
|
abstract class TIME_UNITS
|
|
{
|
|
public const MILLISECONDS = "ms";
|
|
public const SECONDS = "s";
|
|
public const MINUTES = "m";
|
|
public const HOURS = "h";
|
|
public const DAYS = "d";
|
|
public const YEARS = "y";
|
|
public const CONVERSION = [
|
|
self::MILLISECONDS=>1000,
|
|
self::SECONDS=>60,
|
|
self::MINUTES=>60,
|
|
self::HOURS=>24,
|
|
self::DAYS=>365,
|
|
self::YEARS=>PHP_INT_MAX
|
|
];
|
|
}
|
|
function format_milliseconds(int $input, string $min_unit = TIME_UNITS::SECONDS): string
|
|
{
|
|
$output = "";
|
|
|
|
$remainder = $input;
|
|
|
|
$found = false;
|
|
|
|
foreach (TIME_UNITS::CONVERSION as $unit=>$conversion) {
|
|
$count = $remainder % $conversion;
|
|
$remainder = floor($remainder / $conversion);
|
|
|
|
if ($found||$unit==$min_unit) {
|
|
$found = true;
|
|
} else {
|
|
continue;
|
|
}
|
|
|
|
if ($count==0&&$remainder<1) {
|
|
break;
|
|
}
|
|
$output = "$count".$unit." ".$output;
|
|
}
|
|
|
|
return trim($output);
|
|
}
|
|
function parse_to_milliseconds(string $input): int
|
|
{
|
|
$output = 0;
|
|
$current_multiplier = 1;
|
|
|
|
if (preg_match('/^([0-9]+)$/i', $input, $match)) {
|
|
// If just a number, then we treat it as milliseconds
|
|
$length = $match[0];
|
|
if (is_numeric($length)) {
|
|
$length = floatval($length);
|
|
$output += $length;
|
|
}
|
|
} else {
|
|
foreach (TIME_UNITS::CONVERSION as $unit=>$conversion) {
|
|
if (preg_match('/([0-9]+)'.$unit.'/i', $input, $match)) {
|
|
$length = $match[1];
|
|
if (is_numeric($length)) {
|
|
$length = floatval($length);
|
|
$output += $length * $current_multiplier;
|
|
}
|
|
}
|
|
$current_multiplier *= $conversion;
|
|
}
|
|
}
|
|
return intval($output);
|
|
}
|
|
|
|
/**
|
|
* Turn a date into a time, a date, an "X minutes ago...", etc
|
|
*/
|
|
function autodate(string $date, bool $html=true): string
|
|
{
|
|
$cpu = date('c', strtotime($date));
|
|
$hum = date('F j, Y; H:i', strtotime($date));
|
|
return ($html ? "<time datetime='$cpu'>$hum</time>" : $hum);
|
|
}
|
|
|
|
/**
|
|
* Check if a given string is a valid date-time. ( Format: yyyy-mm-dd hh:mm:ss )
|
|
*/
|
|
function isValidDateTime(string $dateTime): bool
|
|
{
|
|
if (preg_match("/^(\d{4})-(\d{2})-(\d{2}) ([01][0-9]|2[0-3]):([0-5][0-9]):([0-5][0-9])$/", $dateTime, $matches)) {
|
|
if (checkdate((int)$matches[2], (int)$matches[3], (int)$matches[1])) {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Check if a given string is a valid date. ( Format: yyyy-mm-dd )
|
|
*/
|
|
function isValidDate(string $date): bool
|
|
{
|
|
if (preg_match("/^(\d{4})-(\d{2})-(\d{2})$/", $date, $matches)) {
|
|
// checkdate wants (month, day, year)
|
|
if (checkdate((int)$matches[2], (int)$matches[3], (int)$matches[1])) {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
function validate_input(array $inputs): array
|
|
{
|
|
$outputs = [];
|
|
|
|
foreach ($inputs as $key => $validations) {
|
|
$flags = explode(',', $validations);
|
|
|
|
if (in_array('bool', $flags) && !isset($_POST[$key])) {
|
|
$_POST[$key] = 'off';
|
|
}
|
|
|
|
if (in_array('optional', $flags)) {
|
|
if (!isset($_POST[$key]) || trim($_POST[$key]) == "") {
|
|
$outputs[$key] = null;
|
|
continue;
|
|
}
|
|
}
|
|
if (!isset($_POST[$key]) || trim($_POST[$key]) == "") {
|
|
throw new InvalidInput("Input '$key' not set");
|
|
}
|
|
|
|
$value = trim($_POST[$key]);
|
|
|
|
if (in_array('user_id', $flags)) {
|
|
$id = int_escape($value);
|
|
if (in_array('exists', $flags)) {
|
|
if (is_null(User::by_id($id))) {
|
|
throw new InvalidInput("User #$id does not exist");
|
|
}
|
|
}
|
|
$outputs[$key] = $id;
|
|
} elseif (in_array('user_name', $flags)) {
|
|
if (strlen($value) < 1) {
|
|
throw new InvalidInput("Username must be at least 1 character");
|
|
} elseif (!preg_match('/^[a-zA-Z0-9-_]+$/', $value)) {
|
|
throw new InvalidInput(
|
|
"Username contains invalid characters. Allowed characters are ".
|
|
"letters, numbers, dash, and underscore"
|
|
);
|
|
}
|
|
$outputs[$key] = $value;
|
|
} elseif (in_array('user_class', $flags)) {
|
|
global $_shm_user_classes;
|
|
if (!array_key_exists($value, $_shm_user_classes)) {
|
|
throw new InvalidInput("Invalid user class: ".html_escape($value));
|
|
}
|
|
$outputs[$key] = $value;
|
|
} elseif (in_array('email', $flags)) {
|
|
$outputs[$key] = trim($value);
|
|
} elseif (in_array('password', $flags)) {
|
|
$outputs[$key] = $value;
|
|
} elseif (in_array('int', $flags)) {
|
|
$value = trim($value);
|
|
if (empty($value) || !is_numeric($value)) {
|
|
throw new InvalidInput("Invalid int: ".html_escape($value));
|
|
}
|
|
$outputs[$key] = (int)$value;
|
|
} elseif (in_array('bool', $flags)) {
|
|
$outputs[$key] = bool_escape($value);
|
|
} elseif (in_array('date', $flags)) {
|
|
$outputs[$key] = date("Y-m-d H:i:s", strtotime(trim($value)));
|
|
} elseif (in_array('string', $flags)) {
|
|
if (in_array('trim', $flags)) {
|
|
$value = trim($value);
|
|
}
|
|
if (in_array('lower', $flags)) {
|
|
$value = strtolower($value);
|
|
}
|
|
if (in_array('not-empty', $flags)) {
|
|
throw new InvalidInput("$key must not be blank");
|
|
}
|
|
if (in_array('nullify', $flags)) {
|
|
if (empty($value)) {
|
|
$value = null;
|
|
}
|
|
}
|
|
$outputs[$key] = $value;
|
|
} else {
|
|
throw new InvalidInput("Unknown validation '$validations'");
|
|
}
|
|
}
|
|
|
|
return $outputs;
|
|
}
|
|
|
|
/**
|
|
* Translates all possible directory separators to the appropriate one for the current system,
|
|
* and removes any duplicate separators.
|
|
*/
|
|
function sanitize_path(string $path): string
|
|
{
|
|
return preg_replace('|[\\\\/]+|S', DIRECTORY_SEPARATOR, $path);
|
|
}
|
|
|
|
/**
|
|
* Combines all path segments specified, ensuring no duplicate separators occur,
|
|
* as well as converting all possible separators to the one appropriate for the current system.
|
|
*/
|
|
function join_path(string ...$paths): string
|
|
{
|
|
$output = "";
|
|
foreach ($paths as $path) {
|
|
if (empty($path)) {
|
|
continue;
|
|
}
|
|
$path = sanitize_path($path);
|
|
if (empty($output)) {
|
|
$output = $path;
|
|
} else {
|
|
$output = rtrim($output, DIRECTORY_SEPARATOR);
|
|
$path = ltrim($path, DIRECTORY_SEPARATOR);
|
|
$output .= DIRECTORY_SEPARATOR . $path;
|
|
}
|
|
}
|
|
return $output;
|
|
}
|
|
|
|
/**
|
|
* Perform callback on each item returned by an iterator.
|
|
*/
|
|
function iterator_map(callable $callback, iterator $iter): Generator
|
|
{
|
|
foreach ($iter as $i) {
|
|
yield call_user_func($callback, $i);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Perform callback on each item returned by an iterator and combine the result into an array.
|
|
*/
|
|
function iterator_map_to_array(callable $callback, iterator $iter): array
|
|
{
|
|
return iterator_to_array(iterator_map($callback, $iter));
|
|
}
|
|
|
|
function stringer($s): string
|
|
{
|
|
if (is_array($s)) {
|
|
if (isset($s[0])) {
|
|
return "[" . implode(", ", array_map("stringer", $s)) . "]";
|
|
} else {
|
|
$pairs = [];
|
|
foreach ($s as $k=>$v) {
|
|
$pairs[] = "\"$k\"=>" . stringer($v);
|
|
}
|
|
return "[" . implode(", ", $pairs) . "]";
|
|
}
|
|
}
|
|
if (is_string($s)) {
|
|
return "\"$s\""; // FIXME: handle escaping quotes
|
|
}
|
|
return (string)$s;
|
|
}
|