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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | namespace Celemas\Verba; |
| 6 | |
| 7 | /** |
| 8 | * Resolves messages for one locale across an ordered cascade of domains. |
| 9 | * |
| 10 | * The first domain whose catalog holds a translation wins; a miss falls back |
| 11 | * to the message id itself. Domains map to the directory that holds their |
| 12 | * `<domain>.<locale>.php` catalog files. |
| 13 | * |
| 14 | * @api |
| 15 | */ |
| 16 | final class Translator |
| 17 | { |
| 18 | /** @var list<string> */ |
| 19 | private array $order; |
| 20 | |
| 21 | /** @var array<string, Catalog> */ |
| 22 | private array $catalogs = []; |
| 23 | |
| 24 | /** |
| 25 | * @param array<string, string> $domains Domain name to i18n directory, in cascade order. |
| 26 | */ |
| 27 | public function __construct( |
| 28 | public readonly string $locale, |
| 29 | private array $domains, |
| 30 | ) { |
| 31 | $this->order = array_keys($domains); |
| 32 | } |
| 33 | |
| 34 | /** |
| 35 | * @param array<array-key, string|int|float> $args |
| 36 | */ |
| 37 | public function translate(string $id, array $args = []): string |
| 38 | { |
| 39 | foreach ($this->order as $domain) { |
| 40 | $entry = $this->catalog($domain)->get($id); |
| 41 | |
| 42 | if (is_string($entry)) { |
| 43 | return Interpolate::apply($entry, $args); |
| 44 | } |
| 45 | } |
| 46 | |
| 47 | return Interpolate::apply($id, $args); |
| 48 | } |
| 49 | |
| 50 | /** |
| 51 | * @param array<array-key, string|int|float> $args |
| 52 | */ |
| 53 | public function translateDomain(string $domain, string $id, array $args = []): string |
| 54 | { |
| 55 | $entry = array_key_exists($domain, $this->domains) ? $this->catalog($domain)->get($id) : null; |
| 56 | |
| 57 | if (is_string($entry)) { |
| 58 | return Interpolate::apply($entry, $args); |
| 59 | } |
| 60 | |
| 61 | return Interpolate::apply($id, $args); |
| 62 | } |
| 63 | |
| 64 | /** |
| 65 | * @param array<array-key, string|int|float> $args |
| 66 | */ |
| 67 | public function translatePlural(string $one, string $many, int $n, array $args = []): string |
| 68 | { |
| 69 | foreach ($this->order as $domain) { |
| 70 | $form = $this->pluralFrom($this->catalog($domain), $one, $n, $args); |
| 71 | |
| 72 | if ($form !== null) { |
| 73 | return $form; |
| 74 | } |
| 75 | } |
| 76 | |
| 77 | return Interpolate::apply($n === 1 ? $one : $many, self::pluralArgs($args, $n)); |
| 78 | } |
| 79 | |
| 80 | /** |
| 81 | * @param array<array-key, string|int|float> $args |
| 82 | */ |
| 83 | public function translateDomainPlural( |
| 84 | string $domain, |
| 85 | string $one, |
| 86 | string $many, |
| 87 | int $n, |
| 88 | array $args = [], |
| 89 | ): string { |
| 90 | if (array_key_exists($domain, $this->domains)) { |
| 91 | $form = $this->pluralFrom($this->catalog($domain), $one, $n, $args); |
| 92 | |
| 93 | if ($form !== null) { |
| 94 | return $form; |
| 95 | } |
| 96 | } |
| 97 | |
| 98 | return Interpolate::apply($n === 1 ? $one : $many, self::pluralArgs($args, $n)); |
| 99 | } |
| 100 | |
| 101 | /** |
| 102 | * @param array<array-key, string|int|float> $args |
| 103 | */ |
| 104 | private function pluralFrom(Catalog $catalog, string $one, int $n, array $args): ?string |
| 105 | { |
| 106 | $entry = $catalog->get($one); |
| 107 | |
| 108 | if (is_array($entry)) { |
| 109 | if ($entry === []) { |
| 110 | return Interpolate::apply($one, self::pluralArgs($args, $n)); |
| 111 | } |
| 112 | |
| 113 | $idx = $catalog->form($n); |
| 114 | $form = $entry[$idx] ?? $entry[array_key_last($entry)]; |
| 115 | |
| 116 | return Interpolate::apply($form, self::pluralArgs($args, $n)); |
| 117 | } |
| 118 | |
| 119 | if (is_string($entry)) { |
| 120 | return Interpolate::apply($entry, self::pluralArgs($args, $n)); |
| 121 | } |
| 122 | |
| 123 | return null; |
| 124 | } |
| 125 | |
| 126 | private function catalog(string $domain): Catalog |
| 127 | { |
| 128 | return $this->catalogs[$domain] ??= Catalog::load( |
| 129 | $this->domains[$domain] . '/' . $domain . '.' . $this->locale . '.php', |
| 130 | $this->locale, |
| 131 | ); |
| 132 | } |
| 133 | |
| 134 | /** |
| 135 | * Positional args are passed through untouched; named (or empty) args gain a |
| 136 | * `:count` placeholder bound to $n unless the caller already set `count`. |
| 137 | * |
| 138 | * @param array<array-key, string|int|float> $args |
| 139 | * @return array<array-key, string|int|float> |
| 140 | */ |
| 141 | private static function pluralArgs(array $args, int $n): array |
| 142 | { |
| 143 | if ($args !== [] && array_is_list($args)) { |
| 144 | return $args; |
| 145 | } |
| 146 | |
| 147 | /** @var array<array-key, string|int|float> $args */ |
| 148 | if (!array_key_exists('count', $args)) { |
| 149 | $args['count'] = $n; |
| 150 | } |
| 151 | |
| 152 | return $args; |
| 153 | } |
| 154 | } |