get-sundata

#!/usr/bin/env php
<?php
// Get sunrise and sunset.
//
// Return 0, if time is between sunrise and sunset.
// Idea: https://github.com/baskerville/bin/blob/macosx/daytime

if ($argc == 2) {
    $now = $argv[1];
}
if (empty($now)) {
    $now = time();
}

$latitude = getenv('X_MY_LATITUDE1');
$longitude = getenv('X_MY_LONGITUDE1');
$offset = (new \DateTimeImmutable('now', new \DateTimeZone(getenv('TZ'))))
    ->getOffset() / 3600;

$sunrise = \date_sunrise(
    $now,
    \SUNFUNCS_RET_TIMESTAMP,
    $latitude,
    $longitude,
    90.583333,
    $offset
);
$sunset = \date_sunset(
    $now,
    \SUNFUNCS_RET_TIMESTAMP,
    $latitude,
    $longitude,
    90.583333,
    $offset
);

print strftime('%H:%M', $sunrise) . ' ' . strftime('%H:%M', $sunset) . PHP_EOL;

if ($sunrise < $now && $now < $sunset) {
    exit(0);
} else {
    exit(1);
}

// vim: set ft=php :