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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | namespace Celema\Boiler; |
| 6 | |
| 7 | use Celema\Boiler\Exception\LogicException; |
| 8 | use Closure; |
| 9 | |
| 10 | /** |
| 11 | * The capture blocks that a template's current render has opened and not |
| 12 | * yet closed, innermost last: sections and components. |
| 13 | * |
| 14 | * Every template render has its own stack, so a template can only close the |
| 15 | * blocks it opened itself. Blocks may nest: a section can contain a component, |
| 16 | * another section, or an include whose template opens and closes its own blocks. |
| 17 | * |
| 18 | * @internal |
| 19 | */ |
| 20 | final class Blocks |
| 21 | { |
| 22 | /** @var list<Block> */ |
| 23 | private array $open = []; |
| 24 | |
| 25 | /** @param Closure(string, Location): void $close receives the captured output and where the block opened */ |
| 26 | public function open(string $kind, string $name, Location $location, Closure $close): void |
| 27 | { |
| 28 | ob_start(); |
| 29 | $this->open[] = new Block($kind, $name, $location, $close); |
| 30 | } |
| 31 | |
| 32 | /** |
| 33 | * Closes the innermost block. With a name, it must be that block's name. |
| 34 | */ |
| 35 | public function close(?string $name = null): void |
| 36 | { |
| 37 | $block = end($this->open); |
| 38 | |
| 39 | if ($block === false) { |
| 40 | throw new LogicException('No open section or component to close'); |
| 41 | } |
| 42 | |
| 43 | if ($name !== null && $name !== $block->name) { |
| 44 | throw new LogicException("`end('{$name}')` does not match the open {$block->kind} `{$block->name}`"); |
| 45 | } |
| 46 | |
| 47 | array_pop($this->open); |
| 48 | ($block->close)((string) ob_get_clean(), $block->location); |
| 49 | } |
| 50 | |
| 51 | public function assertClosed(): void |
| 52 | { |
| 53 | $block = $this->open[0] ?? null; |
| 54 | |
| 55 | if ($block === null) { |
| 56 | return; |
| 57 | } |
| 58 | |
| 59 | throw new LogicException( |
| 60 | "Unclosed {$block->kind} `{$block->name}` at {$block->location}", |
| 61 | location: $block->location, |
| 62 | ); |
| 63 | } |
| 64 | } |