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| 1 | <?php |
| 2 | |
| 3 | namespace Hyde\Framework\Services\Markdown; |
| 4 | |
| 5 | use Illuminate\Support\Facades\Blade; |
| 6 | |
| 7 | /** |
| 8 | * Markdown Processor to render Laravel Blade within Markdown files. |
| 9 | * |
| 10 | * Works on a line-by-line basis by searching for a line starting with the directive. |
| 11 | * The preprocessor expands the directive to an HTML comment. The post-processor parses it. |
| 12 | * |
| 13 | * @example: [Blade]: {{ time() }} |
| 14 | * @example: [Blade]: @include('path/to/view.blade.php') |
| 15 | * |
| 16 | * @see \Tests\Feature\Services\BladeDownProcessorTest |
| 17 | */ |
| 18 | class BladeDownProcessor |
| 19 | { |
| 20 | protected string $html; |
| 21 | protected string $output; |
| 22 | |
| 23 | protected array $pageData = []; |
| 24 | |
| 25 | public static function render(string $html, ?array $pageData = []): string |
| 26 | { |
| 27 | return (new static(static::preprocess($html), $pageData))->run()->get(); |
| 28 | } |
| 29 | |
| 30 | public static function preprocess(string $markdown): string |
| 31 | { |
| 32 | return implode("\n", array_map(function ($line) { |
| 33 | return str_starts_with(strtolower($line), strtolower('[Blade]:')) |
| 34 | ? '<!-- HYDE'.trim(htmlentities($line)).' -->' |
| 35 | : $line; |
| 36 | }, explode("\n", $markdown))); |
| 37 | } |
| 38 | |
| 39 | public static function process(string $html, ?array $pageData = []): string |
| 40 | { |
| 41 | return (new static($html, $pageData))->run()->get(); |
| 42 | } |
| 43 | |
| 44 | public function __construct(string $html, ?array $pageData = []) |
| 45 | { |
| 46 | $this->html = $html; |
| 47 | $this->pageData = $pageData; |
| 48 | } |
| 49 | |
| 50 | public function run(): self |
| 51 | { |
| 52 | $this->output = implode("\n", array_map(function ($line) { |
| 53 | return $this->lineStartsWithDirective($line) |
| 54 | ? $this->processLine($line) |
| 55 | : $line; |
| 56 | }, explode("\n", $this->html))); |
| 57 | |
| 58 | return $this; |
| 59 | } |
| 60 | |
| 61 | public function get(): string |
| 62 | { |
| 63 | return $this->output; |
| 64 | } |
| 65 | |
| 66 | protected function lineStartsWithDirective(string $line): bool |
| 67 | { |
| 68 | return str_starts_with(strtolower($line), '<!-- hyde[blade]:'); |
| 69 | } |
| 70 | |
| 71 | protected function processLine(string $line): string |
| 72 | { |
| 73 | return Blade::render( |
| 74 | substr(substr(html_entity_decode($line), 18), 0, -4), |
| 75 | $this->pageData |
| 76 | ); |
| 77 | } |
| 78 | } |