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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | namespace Cosray; |
| 6 | |
| 7 | use Celema\Container\Container; |
| 8 | use Celema\Container\Resettable; |
| 9 | use Cosray\Icons\Provider; |
| 10 | use Override; |
| 11 | |
| 12 | /** |
| 13 | * Looks up icons in the registered providers and caches the markup. The |
| 14 | * service lives as long as the app, in a worker across requests: found |
| 15 | * icons stay cached up to a limit, missing ones only until the request |
| 16 | * ends, so a provider that failed for a moment is asked again. |
| 17 | */ |
| 18 | final class Icons implements Provider, Resettable |
| 19 | { |
| 20 | private const int MAX_CACHED = 500; |
| 21 | |
| 22 | /** @var array<string, string> */ |
| 23 | private array $found = []; |
| 24 | |
| 25 | /** @var array<string, string> */ |
| 26 | private array $missing = []; |
| 27 | |
| 28 | public function __construct( |
| 29 | private readonly Container $container, |
| 30 | private readonly Config $config, |
| 31 | ) {} |
| 32 | |
| 33 | /** @param array<array-key, mixed> $args */ |
| 34 | #[Override] |
| 35 | public function icon(string $id, array $args = []): string |
| 36 | { |
| 37 | $id = trim($id); |
| 38 | |
| 39 | if ($id === '') { |
| 40 | return $this->failed('empty icon id'); |
| 41 | } |
| 42 | |
| 43 | $key = $this->key($id, $args); |
| 44 | $cached = $this->found[$key] ?? $this->missing[$key] ?? null; |
| 45 | |
| 46 | if ($cached !== null) { |
| 47 | return $cached; |
| 48 | } |
| 49 | |
| 50 | foreach ($this->providers() as $provider) { |
| 51 | $svg = $provider->icon($id, $args); |
| 52 | |
| 53 | if ($svg === '') { |
| 54 | continue; |
| 55 | } |
| 56 | |
| 57 | if (count($this->found) >= self::MAX_CACHED) { |
| 58 | // Drops the icon cached first; the cache only saves provider lookups. |
| 59 | unset($this->found[array_key_first($this->found)]); |
| 60 | } |
| 61 | |
| 62 | return $this->found[$key] = $svg; |
| 63 | } |
| 64 | |
| 65 | return $this->missing[$key] = $this->failed('icon not found: ' . $id); |
| 66 | } |
| 67 | |
| 68 | /** Forgets the icons that were not found, at the end of every request. */ |
| 69 | #[Override] |
| 70 | public function reset(): void |
| 71 | { |
| 72 | $this->missing = []; |
| 73 | } |
| 74 | |
| 75 | /** @return iterable<Provider> */ |
| 76 | private function providers(): iterable |
| 77 | { |
| 78 | $tag = $this->container->tag(Provider::class); |
| 79 | |
| 80 | foreach ($tag->entries() as $id) { |
| 81 | $provider = $tag->get($id); |
| 82 | |
| 83 | if ($provider instanceof Provider) { |
| 84 | yield $provider; |
| 85 | } |
| 86 | } |
| 87 | } |
| 88 | |
| 89 | /** @param array<array-key, mixed> $args */ |
| 90 | private function key(string $id, array $args): string |
| 91 | { |
| 92 | return hash('xxh3', $id . "\x1f" . serialize($args)); |
| 93 | } |
| 94 | |
| 95 | private function failed(string $message): string |
| 96 | { |
| 97 | if (!$this->config->debug()) { |
| 98 | return ''; |
| 99 | } |
| 100 | |
| 101 | return sprintf('<!-- %s -->', escape($message)); |
| 102 | } |
| 103 | } |