<?php

declare(strict_types = 1);

namespace CodelyTv\Utils\Shared;

use DateTimeImmutable;

use DateTimeInterface;

use DateTimeZone;

use function Lambdish\Phunctional\filter_null;

use function Lambdish\Phunctional\map;

function date_to_string(DateTimeInterface $date): string

{

$timestamp = $date->getTimestamp();

$microseconds = $date->format('u');

$millisecondsOnASecond = 1000;

return (string) (((float) ($timestamp . '.' . $microseconds)) * $millisecondsOnASecond);

}

function string_to_date($milliseconds): DateTimeImmutable

{

$millisecondsOnASecond = 1000;

$asSeconds = (int) floor($milliseconds / $millisecondsOnASecond);

$dateTime = new DateTimeImmutable('@' . ((string) $asSeconds), new DateTimeZone('UTC'));

return new DateTimeImmutable(

$dateTime->format('Y-m-d\TH:i:s') .

'.' .

sprintf('%03d', $milliseconds % $millisecondsOnASecond) .

'000' .

$dateTime->format('O')

);

}

function snake_to_camel($word)

{

return lcfirst(str_replace('_', '', ucwords($word, '_')));

}

function camel_to_snake($word)

{

return ctype_lower($word) ? $word : strtolower(preg_replace('/([^A-Z\s])([A-Z])/', '$1_$2', $word));

}

function map_no_null(callable $fn, $coll)

{

return filter_null(map($fn, $coll));

}