misuzu-interim/utility.php

<?php
use Index\Colour\Colour;

function array_test(array $array, callable $func): bool {
    foreach($array as $value)
        if(!$func($value))
            return false;
    return true;
}

function array_apply(array $array, callable $func): array {
    for($i = 0; $i < count($array); ++$i)
        $array[$i] = $func($array[$i]);
    return $array;
}

function array_bit_or(array $array1, array $array2): array {
    foreach($array1 as $key => $value)
        $array1[$key] |= $array2[$key] ?? 0;
    return $array1;
}

function array_rand_value(array $array) {
    return $array[mt_rand(0, count($array) - 1)];
}

function array_find(array $array, callable $callback) {
    foreach($array as $item)
        if($callback($item))
            return $item;
    return null;
}

function clamp($num, int $min, int $max): int {
    return max($min, min($max, (int)$num));
}

function first_paragraph(string $text, string $delimiter = "\n"): string {
    $index = mb_strpos($text, $delimiter);
    return $index === false ? $text : mb_substr($text, 0, $index);
}

function unique_chars(string $input, bool $multibyte = true): int {
    $chars = [];
    $strlen = $multibyte ? 'mb_strlen' : 'strlen';
    $substr = $multibyte ? 'mb_substr' : 'substr';
    $length = $strlen($input);

    for($i = 0; $i < $length; $i++) {
        $current = $substr($input, $i, 1);

        if(!in_array($current, $chars, true)) {
            $chars[] = $current;
        }
    }

    return count($chars);
}

function byte_symbol(int $bytes, bool $decimal = false, array $symbols = ['', 'K', 'M', 'G', 'T', 'P', 'E', 'Z', 'Y']): string {
    if($bytes < 1)
        return '0 B';

    $divider = $decimal ? 1000 : 1024;
    $exp = floor(log($bytes) / log($divider));
    $bytes = $bytes / pow($divider, $exp);
    $symbol = $symbols[$exp];

    return sprintf("%.2f %s%sB", $bytes, $symbol, $symbol !== '' && !$decimal ? 'i' : '');
}

function get_country_name(string $code, string $locale = 'en'): string {
    $code = strtolower($code);
    switch($code) {
        case 'xx':
            return 'Unknown';
        case 'a1':
            return 'Anonymous Proxy';
        case 'a2':
            return 'Satellite Provider';
        case 'cn':
            return 'West Taiwan';
        case 'xm':
            return 'The Moon';
        default:
            return \Locale::getDisplayRegion("-{$code}", $locale);
    }
}

// render_error, render_info and render_info_or_json should be redone a bit better
// following a uniform format so there can be a global handler for em

function render_error(int $code, string $template = 'errors.%d'): string {
    return render_info(null, $code, $template);
}

function render_info(?string $message, int $httpCode, string $template = 'errors.%d'): string {
    http_response_code($httpCode);

    \Misuzu\Template::set('http_code', $httpCode);

    if(!empty($message))
        \Misuzu\Template::set('message', $message);

    $template = sprintf($template, $httpCode);

    return \Misuzu\Template::renderRaw(sprintf($template, $httpCode));
}

function html_colour(int|null|Colour $colour, $attribs = '--user-colour'): string {
    $colour = (string)($colour instanceof Colour ? $colour : Colour::fromMisuzu($colour ?? 0x40000000));

    if(is_string($attribs))
        $attribs = [ $attribs => '%s' ];

    if(!$attribs)
        $attribs = [
            'color' => '%s',
            '--user-colour' => '%s',
        ];

    $css = '';
    foreach($attribs as $name => $format)
        $css .= $name . ':' . sprintf($format, $colour) . ';';

    return $css;
}

function msz_server_timing(\Index\Performance\Timings $timings): string {
    $laps = $timings->getLaps();
    $timings = [];

    foreach($laps as $lap) {
        $timing = $lap->getName();
        if($lap->hasComment())
            $timing .= ';desc="' . strtr($lap->getComment(), ['"' => '\\"']) . '"';

        $timing .= ';dur=' . round($lap->getDurationTime(), 5);
        $timings[] = $timing;
    }

    return sprintf('Server-Timing: %s', implode(', ', $timings));
}

function msz_cookie_domain(bool $compatible = true): string {
    $url = parse_url($_SERVER['HTTP_HOST'], PHP_URL_HOST);
    if(empty($url))
        $url = $_SERVER['HTTP_HOST'];

    if(!filter_var($url, FILTER_VALIDATE_IP) && $compatible)
        $url = '.' . $url;

    return $url;
}