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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | namespace Cosray\Assets; |
| 6 | |
| 7 | use Celema\Quma\Database; |
| 8 | use Cosray\Config; |
| 9 | |
| 10 | /** |
| 11 | * Asset catalog access with a per-instance cache. One instance lives on |
| 12 | * the request Context, so every value object of a request shares one |
| 13 | * batch-loaded uid map instead of issuing per-item queries. |
| 14 | */ |
| 15 | class Repository |
| 16 | { |
| 17 | /** @var array<string, ?Asset> */ |
| 18 | protected array $cache = []; |
| 19 | |
| 20 | public function __construct( |
| 21 | protected readonly Database $db, |
| 22 | protected readonly Config $config, |
| 23 | ) {} |
| 24 | |
| 25 | /** |
| 26 | * Collect asset uids referenced by media items in a content array. |
| 27 | * Media items are exactly `{uid}` or `{uid, meta}`; arrays with more |
| 28 | * keys (blocks, entries) are descended into instead. |
| 29 | * |
| 30 | * @return list<string> |
| 31 | */ |
| 32 | public static function collectUids(array $content): array |
| 33 | { |
| 34 | $uids = []; |
| 35 | $walk = static function (array $data) use (&$walk, &$uids): void { |
| 36 | if ( |
| 37 | is_string($data['uid'] ?? null) |
| 38 | && $data['uid'] !== '' |
| 39 | && array_diff(array_keys($data), ['uid', 'meta']) === [] |
| 40 | ) { |
| 41 | $uids[$data['uid']] = true; |
| 42 | |
| 43 | return; |
| 44 | } |
| 45 | |
| 46 | foreach ($data as $value) { |
| 47 | if (!is_array($value)) { |
| 48 | continue; |
| 49 | } |
| 50 | |
| 51 | $walk($value); |
| 52 | } |
| 53 | }; |
| 54 | $walk($content); |
| 55 | |
| 56 | return array_keys($uids); |
| 57 | } |
| 58 | |
| 59 | /** @param list<string> $uids */ |
| 60 | public function preload(array $uids): void |
| 61 | { |
| 62 | $missing = []; |
| 63 | |
| 64 | foreach ($uids as $uid) { |
| 65 | if (array_key_exists($uid, $this->cache)) { |
| 66 | continue; |
| 67 | } |
| 68 | |
| 69 | $missing[] = $uid; |
| 70 | } |
| 71 | |
| 72 | if ($missing === []) { |
| 73 | return; |
| 74 | } |
| 75 | |
| 76 | foreach ($this->fetch($missing) as $row) { |
| 77 | $this->add($this->fromRow($row)); |
| 78 | } |
| 79 | |
| 80 | // Remember misses so unknown uids are not refetched per item. |
| 81 | foreach ($missing as $uid) { |
| 82 | $this->cache[$uid] ??= null; |
| 83 | } |
| 84 | } |
| 85 | |
| 86 | public function get(string $uid): ?Asset |
| 87 | { |
| 88 | if (!array_key_exists($uid, $this->cache)) { |
| 89 | $this->preload([$uid]); |
| 90 | } |
| 91 | |
| 92 | return $this->cache[$uid]; |
| 93 | } |
| 94 | |
| 95 | /** Seed the cache, e.g. after an upload or in tests. */ |
| 96 | public function add(Asset $asset): void |
| 97 | { |
| 98 | $this->cache[$asset->uid] = $asset; |
| 99 | } |
| 100 | |
| 101 | /** @param list<string> $uids */ |
| 102 | protected function fetch(array $uids): array |
| 103 | { |
| 104 | return $this->db->assets->byUids(['uids' => $uids])->all(); |
| 105 | } |
| 106 | |
| 107 | protected function fromRow(array $row): Asset |
| 108 | { |
| 109 | return Asset::fromRow($row, $this->config); |
| 110 | } |
| 111 | } |