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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | namespace Cosray\Assets; |
| 6 | |
| 7 | /** |
| 8 | * The editable slice of an asset's `meta` bag: localized text |
| 9 | * (`alt`/`title`/`caption` as locale => string maps), a scalar `credit` |
| 10 | * line, and an image `focal` point `{x, y}` clamped to 0..1. Empty |
| 11 | * values are dropped so the stored bag never accumulates blank keys, and |
| 12 | * keys the panel does not manage are carried through untouched. |
| 13 | */ |
| 14 | final class Meta |
| 15 | { |
| 16 | /** Localized text keys, stored as locale => string maps. */ |
| 17 | private const array TEXT = ['alt', 'title', 'caption']; |
| 18 | |
| 19 | /** |
| 20 | * Merge a submitted editable patch over the stored bag. The managed |
| 21 | * keys are cleared first, so a field the user emptied is removed |
| 22 | * rather than left at its previous value. |
| 23 | * |
| 24 | * @param array<string, mixed> $stored the asset's current meta |
| 25 | * @param list<string> $localeIds locale ids accepted as text-map keys |
| 26 | * @return array<string, mixed> |
| 27 | */ |
| 28 | public static function apply(array $stored, mixed $input, array $localeIds, bool $image): array |
| 29 | { |
| 30 | foreach ([...self::TEXT, 'credit', 'focal'] as $key) { |
| 31 | unset($stored[$key]); |
| 32 | } |
| 33 | |
| 34 | $input = is_array($input) ? $input : []; |
| 35 | |
| 36 | foreach (self::TEXT as $key) { |
| 37 | $map = self::textMap($input[$key] ?? null, $localeIds); |
| 38 | |
| 39 | if ($map !== []) { |
| 40 | $stored[$key] = $map; |
| 41 | } |
| 42 | } |
| 43 | |
| 44 | $credit = is_string($input['credit'] ?? null) ? trim($input['credit']) : ''; |
| 45 | |
| 46 | if ($credit !== '') { |
| 47 | $stored['credit'] = $credit; |
| 48 | } |
| 49 | |
| 50 | if ($image) { |
| 51 | $focal = self::focal($input['focal'] ?? null); |
| 52 | |
| 53 | if ($focal !== null) { |
| 54 | $stored['focal'] = $focal; |
| 55 | } |
| 56 | } |
| 57 | |
| 58 | return $stored; |
| 59 | } |
| 60 | |
| 61 | /** |
| 62 | * @param list<string> $localeIds |
| 63 | * @return array<string, string> |
| 64 | */ |
| 65 | private static function textMap(mixed $value, array $localeIds): array |
| 66 | { |
| 67 | if (!is_array($value)) { |
| 68 | return []; |
| 69 | } |
| 70 | |
| 71 | $allowed = $localeIds === [] ? null : array_fill_keys($localeIds, true); |
| 72 | $map = []; |
| 73 | |
| 74 | foreach ($value as $locale => $text) { |
| 75 | if (!is_string($locale) || $allowed !== null && !isset($allowed[$locale])) { |
| 76 | continue; |
| 77 | } |
| 78 | |
| 79 | $text = is_string($text) ? trim($text) : ''; |
| 80 | |
| 81 | if ($text !== '') { |
| 82 | $map[$locale] = $text; |
| 83 | } |
| 84 | } |
| 85 | |
| 86 | return $map; |
| 87 | } |
| 88 | |
| 89 | /** @return array{x: float, y: float}|null */ |
| 90 | private static function focal(mixed $value): ?array |
| 91 | { |
| 92 | if ( |
| 93 | !is_array($value) |
| 94 | || !isset($value['x'], $value['y']) |
| 95 | || !is_numeric($value['x']) |
| 96 | || !is_numeric($value['y']) |
| 97 | ) { |
| 98 | return null; |
| 99 | } |
| 100 | |
| 101 | return [ |
| 102 | 'x' => self::clamp((float) $value['x']), |
| 103 | 'y' => self::clamp((float) $value['y']), |
| 104 | ]; |
| 105 | } |
| 106 | |
| 107 | private static function clamp(float $n): float |
| 108 | { |
| 109 | return max(0.0, min(1.0, $n)); |
| 110 | } |
| 111 | } |