shabbat.php

<?php declare(strict_types=1);

namespace AVC;

class Shabbat
{
    public static function enforce(): void {
        if (is_falsy(from_server(key: IS_DEV)) && self::is_shabbat()) {
            self::send_headers();
            echo self::render_shabbat();
            exit;
        }
    }
    public static function str_date(): string
    {
        $date = new \DateTime(
            datetime: 'now',
            timezone: new \DateTimeZone(timezone: 'America/New_York'),
        );
        $jd = gregoriantojd(
            month: (int)$date->format(format: 'm'),
            day: (int)$date->format(format: 'd'),
            year: (int)$date->format(format: 'Y'),
        );
        $hebrew_date = cal_from_jd(
            julian_day: $jd,
            calendar: CAL_JEWISH,
        );
        $hebrew_months = [
            1 => 'Tishri',
            2 => 'Heshvan',
            3 => 'Kislev',
            4 => 'Tevet',
            5 => 'Shevat',
            6 => 'Adar',
            7 => 'Adar II',
            8 => 'Nisan',
            9 => 'Iyar',
            10 => 'Sivan',
            11 => 'Tammuz',
            12 => 'Av',
            13 => 'Elul'
        ];
        return sprintf("%d %s %d",
            $hebrew_date['day'],
            $hebrew_months[$hebrew_date['month']],
            $hebrew_date['year']
        );
    }

    private static function current_time(): \DateTime {
        return new \DateTime();
    }

    private static function friday_730pm(): \DateTime {
        return new \DateTime(datetime: 'Friday this week 19:30')
            ->setTimezone(new \DateTimeZone(timezone: 'America/New_York'));
    }

    private static function saturday_830pm(): \DateTime {
        return new \DateTime(datetime: 'Saturday this week 20:30')
            ->setTimezone(new \DateTimeZone(timezone: 'America/New_York'));
    }

    public static function is_shabbat(): bool
    {
        return (
            self::current_time() >= self::friday_730pm()
            &&
            self::current_time() < self::saturday_830pm()
        );
    }

    public static function remaining_time(): int {
        return self::saturday_830pm()->getTimestamp() - self::current_time()->getTimestamp();
    }

    public static function end_time(): string {
        return self::saturday_830pm()->format('l, F j, Y');
    }

    public static function send_headers(): void {
        if (!empty($_SERVER['HTTP_X_SHABBAT_CHECK'])) {
            return; // Exit if this header is already set
        }
        header('X-Shabbat-Check: true');
        header('Cache-Control: no-store, no-cache, must-revalidate, max-age=0');
        header('Cache-Control: post-check=0, pre-check=0', false);
        header('Pragma: no-cache');
        header('Expires: Thu, 01 Jan 1970 00:00:00 GMT');
        header('Content-Type: text/html; charset=utf-8');
    }

    public static function render_shabbat(): string {
        global $configs;
        $company = $configs['general']['company'] ?? 'This website';
        $title = i18n::__("Shabbat Shalom!");
        $remaining_time = self::remaining_time();
        $h1 = i18n::__("SHABBAT SHALOM!");
        $p1 = i18n::__("is honoring Yeshua's Sabbath for Shabbat.");
        $p2 = i18n::__("Our site will be back online in");
        $p3 = i18n::__("We will reopen at 8:30pm on");
        $p4 = i18n::__("Current Date");
        $end_time = self::end_time();
        $str_date = self::str_date();
        return <<<DOD
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>{$title}</title>
    <style>
        body {
            background-color: #2F4F4F; /* Slate Steel Gray */
            color: #2C2C2C; /* Noir Graphite Dark Gray */
            font-family: Arial, sans-serif;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            height: 100vh;
            margin: 0;
        }
        .container {
            background-color: rgba(255, 255, 255, 0.9);
            padding: 2rem;
            border-radius: 10px;
            text-align: center;
            box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
            max-width: 600px;
            width: 90%;
        }
        .countdown {
            font-size: 2rem;
            margin: 1rem 0;
            font-weight: bold;
        }
        h1 {
            margin-top: 0;
        }
    </style>
    <script>
        function startCountdown(seconds) {
            const countdownElem = document.getElementById('countdown');
            function updateCountdown() {
                const days = Math.floor(seconds / 86400);
                const hours = Math.floor((seconds % 86400) / 3600);
                const minutes = Math.floor((seconds % 3600) / 60);
                const secs = seconds % 60;
                countdownElem.textContent =
                    String(days).padStart(2, '0') + 'd ' +
                    String(hours).padStart(2, '0') + 'h ' +
                    String(minutes).padStart(2, '0') + 'm ' +
                    String(secs).padStart(2, '0') + 's';
                if (seconds > 0) {
                    seconds--;
                    setTimeout(updateCountdown, 1000);
                }
            }
            updateCountdown();
        }
        document.addEventListener('DOMContentLoaded', () => {
            const remainingTime = {$remaining_time};
            startCountdown(remainingTime);
        });
    </script>
</head>
<body>
    <div class="container">
        <h1>{$h1}</h1>
        <p>{$company} {$p1}</p>
        <p>{$p2}:</p>
        <div class="countdown" id="countdown"></div>
        <p>{$p3} {$end_time}.</p>
        <p>{$p4}: {$str_date}</p>
    </div>
</body>
</html>
DOD;
    }

}

\class_alias(Shabbat::class, 'Shabbat');