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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | namespace Cosray\DateTime; |
| 6 | |
| 7 | use DateTimeImmutable; |
| 8 | use DateTimeInterface; |
| 9 | use DateTimeZone; |
| 10 | use Throwable; |
| 11 | |
| 12 | final class Codec |
| 13 | { |
| 14 | public const string STORAGE_FORMAT = 'Y-m-d\\TH:i:s\\Z'; |
| 15 | public const string INPUT_FORMAT = 'Y-m-d\\TH:i:s'; |
| 16 | |
| 17 | private const string RFC3339 = '/^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}(?:Z|[+-]\d{2}:\d{2})$/'; |
| 18 | |
| 19 | public static function parse(string $value): ?DateTimeImmutable |
| 20 | { |
| 21 | if (preg_match(self::RFC3339, $value) !== 1) { |
| 22 | return null; |
| 23 | } |
| 24 | |
| 25 | $date = DateTimeImmutable::createFromFormat('!Y-m-d\\TH:i:sP', $value); |
| 26 | |
| 27 | if ($date === false || !self::clean()) { |
| 28 | return null; |
| 29 | } |
| 30 | |
| 31 | $expected = str_ends_with($value, 'Z') ? substr($value, 0, -1) . '+00:00' : $value; |
| 32 | |
| 33 | return $date->format('Y-m-d\\TH:i:sP') === $expected ? $date : null; |
| 34 | } |
| 35 | |
| 36 | public static function normalize(string $value): ?string |
| 37 | { |
| 38 | $date = self::parse($value); |
| 39 | |
| 40 | return $date?->setTimezone(self::utc())->format(self::STORAGE_FORMAT); |
| 41 | } |
| 42 | |
| 43 | public static function format(DateTimeInterface $value): string |
| 44 | { |
| 45 | return DateTimeImmutable::createFromInterface($value) |
| 46 | ->setTimezone(self::utc()) |
| 47 | ->format(self::STORAGE_FORMAT); |
| 48 | } |
| 49 | |
| 50 | public static function input(string $value, DateTimeZone $timezone): ?string |
| 51 | { |
| 52 | return self::parse($value)?->setTimezone($timezone)->format(self::INPUT_FORMAT); |
| 53 | } |
| 54 | |
| 55 | public static function fromInput(string $value, DateTimeZone $timezone): ?string |
| 56 | { |
| 57 | if ($value === '') { |
| 58 | return ''; |
| 59 | } |
| 60 | |
| 61 | $formats = strlen($value) === 16 ? ['!Y-m-d\\TH:i', 'Y-m-d\\TH:i'] : ['!Y-m-d\\TH:i:s', 'Y-m-d\\TH:i:s']; |
| 62 | $date = DateTimeImmutable::createFromFormat($formats[0], $value, $timezone); |
| 63 | |
| 64 | if ($date === false || !self::clean() || $date->format($formats[1]) !== $value) { |
| 65 | return null; |
| 66 | } |
| 67 | |
| 68 | return self::format($date); |
| 69 | } |
| 70 | |
| 71 | public static function fromLegacy(string $value, DateTimeZone $timezone): ?string |
| 72 | { |
| 73 | $normalized = self::normalize($value); |
| 74 | |
| 75 | if ($normalized !== null) { |
| 76 | return $normalized; |
| 77 | } |
| 78 | |
| 79 | if (str_contains($value, 'T')) { |
| 80 | return self::fromInput($value, $timezone); |
| 81 | } |
| 82 | |
| 83 | $date = DateTimeImmutable::createFromFormat('!Y-m-d H:i:s', $value, $timezone); |
| 84 | |
| 85 | if ($date === false || !self::clean() || $date->format('Y-m-d H:i:s') !== $value) { |
| 86 | return null; |
| 87 | } |
| 88 | |
| 89 | return self::format($date); |
| 90 | } |
| 91 | |
| 92 | public static function timezone(mixed $value): ?DateTimeZone |
| 93 | { |
| 94 | if (!is_string($value) || $value === '') { |
| 95 | return null; |
| 96 | } |
| 97 | |
| 98 | try { |
| 99 | return new DateTimeZone($value); |
| 100 | } catch (Throwable) { |
| 101 | return null; |
| 102 | } |
| 103 | } |
| 104 | |
| 105 | public static function utc(): DateTimeZone |
| 106 | { |
| 107 | return new DateTimeZone('UTC'); |
| 108 | } |
| 109 | |
| 110 | private static function clean(): bool |
| 111 | { |
| 112 | $errors = DateTimeImmutable::getLastErrors(); |
| 113 | |
| 114 | return $errors === false || $errors['warning_count'] === 0 && $errors['error_count'] === 0; |
| 115 | } |
| 116 | } |