initial

1 files changed, 298 insertions, 0 deletions

diff --git a/functions.php b/functions.php
new file mode 100644
index 0000000..9f62f32
--- /dev/null
+++ b/functions.php
@@ -0,0 +1,298 @@
+<?php
+
+function htmlescape(string|array $s): string|array {
+    if (is_array($s)) {
+        foreach ($s as $k => $v) {
+            $s[$k] = htmlescape($v);
+        }
+        return $s;
+    }
+    return htmlspecialchars($s, ENT_QUOTES, 'UTF-8');
+}
+
+function strtrim(string $str, int $len, bool &$trimmed): string {
+    if (mb_strlen($str) > $len) {
+        $str = mb_substr($str, 0, $len);
+        $trimmed = true;
+    } else {
+        $trimmed = false;
+    }
+    return $str;
+}
+
+function sizeString(int $size): string {
+    $ks = array('B', 'KiB', 'MiB', 'GiB');
+    foreach ($ks as $i => $k) {
+        if ($size < pow(1024, $i + 1)) {
+            if ($i == 0)
+                return $size . ' ' . $k;
+            return round($size / pow(1024, $i), 2).' '.$k;
+        }
+    }
+    return $size;
+}
+
+function extension(string $name): string {
+    $expl = explode('.', $name);
+    return end($expl);
+}
+
+/**
+ * @param string $filename
+ * @return resource|bool
+ */
+function imageopen(string $filename) {
+    $size = getimagesize($filename);
+    $types = [
+        1 => 'gif',
+        2 => 'jpeg',
+        3 => 'png'
+    ];
+    if (!$size || !isset($types[$size[2]]))
+        return null;
+    return call_user_func('imagecreatefrom'.$types[$size[2]], $filename);
+}
+
+function detect_image_type(string $filename) {
+    $size = getimagesize($filename);
+    $types = [
+        1 => 'gif',
+        2 => 'jpg',
+        3 => 'png'
+    ];
+    if (!$size || !isset($types[$size[2]]))
+        return false;
+    return $types[$size[2]];
+}
+
+function transliterate(string $string): string {
+    $roman = array(
+        'Sch', 'sch', 'Yo', 'Zh', 'Kh', 'Ts', 'Ch', 'Sh', 'Yu', 'ya', 'yo',
+        'zh', 'kh', 'ts', 'ch', 'sh', 'yu', 'ya', 'A', 'B', 'V', 'G', 'D', 'E',
+        'Z', 'I', 'Y', 'K', 'L', 'M', 'N', 'O', 'P', 'R', 'S', 'T', 'U', 'F',
+        '', 'Y', '', 'E', 'a', 'b', 'v', 'g', 'd', 'e', 'z', 'i', 'y', 'k',
+        'l', 'm',  'n', 'o', 'p', 'r', 's', 't', 'u', 'f', '', 'y', '', 'e'
+    );
+    $cyrillic = array(
+        'Щ', 'щ', 'Ё', 'Ж', 'Х', 'Ц', 'Ч', 'Ш', 'Ю', 'я', 'ё', 'ж', 'х', 'ц',
+        'ч', 'ш', 'ю', 'я', 'А', 'Б', 'В', 'Г', 'Д', 'Е', 'З', 'И', 'Й', 'К',
+        'Л', 'М', 'Н', 'О', 'П', 'Р', 'С', 'Т', 'У', 'Ф', 'Ь', 'Ы', 'Ъ', 'Э',
+        'а', 'б', 'в', 'г', 'д', 'е', 'з', 'и', 'й', 'к', 'л', 'м', 'н', 'о',
+        'п', 'р', 'с', 'т', 'у', 'ф', 'ь', 'ы', 'ъ', 'э'
+    );
+    return str_replace($cyrillic, $roman, $string);
+}
+
+/**
+ * @param resource $img
+ * @param ?int $w
+ * @param ?int $h
+ * @param ?int[] $transparent_color
+ */
+function imageresize(&$img, ?int $w = null, ?int $h = null, ?array $transparent_color = null) {
+    assert(is_int($w) || is_int($h));
+
+    $curw = imagesx($img);
+    $curh = imagesy($img);
+
+    if (!is_int($w) && is_int($h)) {
+        $w = round($curw / ($curw / $w));
+    } else if (is_int($w) && !is_int($h)) {
+        $h = round($curh / ($curh / $h));
+    }
+
+    $img2 = imagecreatetruecolor($w, $h);
+    if (is_array($transparent_color)) {
+        list($r, $g, $b) = $transparent_color;
+        $col = imagecolorallocate($img2,  $r, $g, $b);
+        imagefilledrectangle($img2, 0, 0, $w, $h, $col);
+    } else {
+        imagealphablending($img2, false);
+        imagesavealpha($img2, true);
+        imagefilledrectangle($img2, 0, 0, $w, $h, imagecolorallocatealpha($img2, 255, 255, 255, 127));
+    }
+
+    imagecopyresampled($img2, $img, 0, 0, 0, 0, $w, $h, $curw, $curh);
+    imagedestroy($img);
+
+    $img = $img2;
+}
+
+function rrmdir(string $dir, bool $dont_delete_dir = false): bool {
+    if (!is_dir($dir)) {
+        logError('rrmdir: '.$dir.' is not a directory');
+        return false;
+    }
+
+    $objects = scandir($dir);
+    foreach ($objects as $object) {
+        if ($object != '.' && $object != '..') {
+            if (is_dir($dir.'/'.$object)) {
+                rrmdir($dir.'/'.$object);
+            } else {
+                unlink($dir.'/'.$object);
+            }
+        }
+    }
+
+    if (!$dont_delete_dir)
+        rmdir($dir);
+
+    return true;
+}
+
+function ip2ulong(string $ip): int {
+    return sprintf("%u", ip2long($ip));
+}
+
+function ulong2ip(int $ip): string {
+    $long = 4294967295 - ($ip - 1);
+    return long2ip(-$long);
+}
+
+function from_camel_case(string $s): string {
+    $buf = '';
+    $len = strlen($s);
+    for ($i = 0; $i < $len; $i++) {
+        if (!ctype_upper($s[$i])) {
+            $buf .= $s[$i];
+        } else {
+            $buf .= '_'.strtolower($s[$i]);
+        }
+    }
+    return $buf;
+}
+
+function to_camel_case(string $input, string $separator = '_'): string {
+    return lcfirst(str_replace($separator, '', ucwords($input, $separator)));
+}
+
+function str_replace_once(string $needle, string $replace, string $haystack) {
+    $pos = strpos($haystack, $needle);
+    if ($pos !== false)
+        $haystack = substr_replace($haystack, $replace, $pos, strlen($needle));
+    return $haystack;
+}
+
+function strgen(int $len): string {
+    $buf = '';
+    for ($i = 0; $i < $len; $i++) {
+        $j = mt_rand(0, 61);
+        if ($j >= 36) {
+            $j += 13;
+        } else if ($j >= 10) {
+            $j += 7;
+        }
+        $buf .= chr(48 + $j);
+    }
+    return $buf;
+}
+
+function sanitize_filename(string $name): string {
+    $name = mb_strtolower($name);
+    $name = transliterate($name);
+    $name = preg_replace('/[^\w\d\-_\s.]/', '', $name);
+    $name = preg_replace('/\s+/', '_', $name);
+    return $name;
+}
+
+function glob_escape(string $pattern): string {
+    if (strpos($pattern, '[') !== false || strpos($pattern, ']') !== false) {
+        $placeholder = uniqid();
+        $replaces = array( $placeholder.'[', $placeholder.']', );
+        $pattern = str_replace( array('[', ']', ), $replaces, $pattern);
+        $pattern = str_replace( $replaces, array('[[]', '[]]', ), $pattern);
+    }
+    return $pattern;
+}
+
+/**
+ * Does not support flag GLOB_BRACE
+ *
+ * @param string $pattern
+ * @param int $flags
+ * @return array
+ */
+function glob_recursive(string $pattern, int $flags = 0): array {
+    $files = glob(glob_escape($pattern), $flags);
+    foreach (glob(glob_escape(dirname($pattern)).'/*', GLOB_ONLYDIR|GLOB_NOSORT) as $dir) {
+        $files = array_merge($files, glob_recursive($dir.'/'.basename($pattern), $flags));
+    }
+    return $files;
+}
+
+function setperm(string $file): void {
+    global $config;
+
+    // chgrp
+    $gid = filegroup($file);
+    if ($gid != $config['group']) {
+        if (!chgrp($file, $config['group'])) {
+            logError(__FUNCTION__.": chgrp() failed on $file");
+        }
+    }
+
+    // chmod
+    $perms = fileperms($file);
+    $need_perms = is_dir($file) ? $config['dirs_mode'] : $config['files_mode'];
+    if (($perms & $need_perms) !== $need_perms) {
+        if (!chmod($file, $need_perms)) {
+            logError(__FUNCTION__.": chmod() failed on $file");
+        }
+    }
+}
+
+function salt_password(string $pwd): string {
+    global $config;
+    return hash('sha256', "{$pwd}|{$config['password_salt']}");
+}
+
+function exectime(?string $format = null) {
+    $time = round(microtime(true) - START_TIME, 4);
+    if (!is_null($format))
+        $time = sprintf($format, $time);
+    return $time;
+}
+
+function fullURL(string $url): string {
+    global $config;
+    return 'https://'.$config['domain'].$url;
+}
+
+function getDb(): SQLiteConnection|MySQLConnection|null {
+    global $config;
+    static $link = null;
+    if (!is_null($link))
+        return $link;
+
+    switch ($config['db']['type']) {
+        case 'mysql':
+            $link = new MySQLConnection(
+                $config['db']['host'],
+                $config['db']['user'],
+                $config['db']['password'],
+                $config['db']['database']);
+            if (!$link->connect()) {
+                if (PHP_SAPI != 'cli') {
+                    header('HTTP/1.1 503 Service Temporarily Unavailable');
+                    header('Status: 503 Service Temporarily Unavailable');
+                    header('Retry-After: 300');
+                    die('database connection failed');
+                } else {
+                    fwrite(STDERR, 'database connection failed');
+                    exit(1);
+                }
+            }
+            break;
+
+        case 'sqlite':
+            $link = new SQLiteConnection($config['db']['path']);
+            break;
+
+        default:
+            logError('invalid database type');
+            break;
+    }
+
+    return $link;
+}