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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | namespace Cosray\Block; |
| 6 | |
| 7 | use Cosray\Assets\ResizeMode; |
| 8 | use Cosray\Assets\SizeSpec; |
| 9 | use Cosray\Contract\Block; |
| 10 | use Cosray\Exception\RuntimeException; |
| 11 | use Cosray\Field; |
| 12 | use Cosray\Schema\Label; |
| 13 | use Cosray\Schema\Limit; |
| 14 | use Cosray\Schema\Required; |
| 15 | use Cosray\Schema\Translate; |
| 16 | use Cosray\Value\Block as BlockValue; |
| 17 | |
| 18 | use function Cosray\escape; |
| 19 | |
| 20 | #[Label('block:image')] |
| 21 | final class Image implements Block |
| 22 | { |
| 23 | private const array LADDER = ['block-sm', 'block', 'block-lg']; |
| 24 | private const string SIZES = '(min-width: 48rem) {pct}vw, 100vw'; |
| 25 | |
| 26 | #[Label('block:image'), Required, Limit(1), Translate] |
| 27 | protected Field\Image $image; |
| 28 | |
| 29 | public function render(BlockValue $block, RenderContext $ctx): string |
| 30 | { |
| 31 | $image = $block->image; |
| 32 | $asset = $ctx->asset((string) ($image->unwrap()['uid'] ?? '')); |
| 33 | |
| 34 | if ($asset === null) { |
| 35 | return ''; |
| 36 | } |
| 37 | |
| 38 | $alt = escape($image->alt() ?: strip_tags($image->title())); |
| 39 | $path = escape($asset->path()); |
| 40 | |
| 41 | if (!$asset->resizable()) { |
| 42 | return "<img src=\"{$path}\" alt=\"{$alt}\" data-path-original=\"{$path}\">"; |
| 43 | } |
| 44 | |
| 45 | $specs = $this->ladder($ctx); |
| 46 | $src = escape($asset->sizePath($specs[intdiv(count($specs), 2)]->name)); |
| 47 | |
| 48 | if (count($specs) === 1) { |
| 49 | return "<img src=\"{$src}\" alt=\"{$alt}\" data-path-original=\"{$path}\">"; |
| 50 | } |
| 51 | |
| 52 | $srcset = escape(implode(', ', array_map( |
| 53 | static fn(SizeSpec $spec) => $asset->sizePath($spec->name) . " {$spec->first}w", |
| 54 | $specs, |
| 55 | ))); |
| 56 | $sizes = escape($this->sizes($ctx, $block->layout()->colspan)); |
| 57 | |
| 58 | return ( |
| 59 | "<img src=\"{$src}\" srcset=\"{$srcset}\" sizes=\"{$sizes}\"" |
| 60 | . " alt=\"{$alt}\" data-path-original=\"{$path}\">" |
| 61 | ); |
| 62 | } |
| 63 | |
| 64 | /** |
| 65 | * The named sizes forming the srcset ladder, ascending by width. |
| 66 | * Multi-rung ladders need `w` descriptors, so their entries must use |
| 67 | * the `width` mode; a single rung emits a plain `src` and may use |
| 68 | * any mode. |
| 69 | * |
| 70 | * @return list<SizeSpec> |
| 71 | */ |
| 72 | private function ladder(RenderContext $ctx): array |
| 73 | { |
| 74 | $names = $ctx->args['imageSizes'] ?? self::LADDER; |
| 75 | |
| 76 | if (!is_array($names) || $names === []) { |
| 77 | throw new RuntimeException('Blocks error: `imageSizes` must be a non-empty list of size names'); |
| 78 | } |
| 79 | |
| 80 | $registry = $ctx->owner->config()->media->sizes; |
| 81 | $specs = array_map(static fn($name) => $registry->get((string) $name), array_values($names)); |
| 82 | |
| 83 | if (count($specs) > 1) { |
| 84 | foreach ($specs as $spec) { |
| 85 | if ($spec->mode !== ResizeMode::Width) { |
| 86 | throw new RuntimeException( |
| 87 | "Blocks error: srcset entry '{$spec->name}' must use the `width` mode", |
| 88 | ); |
| 89 | } |
| 90 | } |
| 91 | |
| 92 | usort($specs, static fn(SizeSpec $a, SizeSpec $b) => $a->first <=> $b->first); |
| 93 | } |
| 94 | |
| 95 | return $specs; |
| 96 | } |
| 97 | |
| 98 | private function sizes(RenderContext $ctx, int $span): string |
| 99 | { |
| 100 | $template = (string) ($ctx->args['sizes'] ?? self::SIZES); |
| 101 | $pct = (int) round(($span / max($ctx->columns, 1)) * 100); |
| 102 | |
| 103 | return str_replace('{pct}', (string) $pct, $template); |
| 104 | } |
| 105 | } |