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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | namespace Phpdftk\WptHarness; |
| 6 | |
| 7 | use Phpdftk\HtmlToPdf\Renderer; |
| 8 | use Phpdftk\HtmlToPdf\RendererOptions; |
| 9 | use Phpdftk\Pdf\Writer\PdfWriter; |
| 10 | |
| 11 | /** |
| 12 | * Orchestrator for the cross-browser PDF oracle. For each test fixture: |
| 13 | * |
| 14 | * 1. Render the test through ours. |
| 15 | * 2. Render the test through each available browser engine (Chromium, |
| 16 | * Firefox, WebKit), backed by {@see BrowserOracle}'s file cache. |
| 17 | * 3. Rasterise every PDF to PNG via {@see Rasteriser}. |
| 18 | * 4. Hand the PNGs to {@see ConsensusScorer} for a verdict. |
| 19 | * |
| 20 | * The result includes the consensus verdict, per-engine PNG paths |
| 21 | * (for diagnostics), reasoning string, and timing data. CLI callers |
| 22 | * format it for humans; CI callers serialise it for downstream |
| 23 | * comparison. |
| 24 | */ |
| 25 | final class CrossBrowserRunner |
| 26 | { |
| 27 | private const ALL_ENGINES = ['chromium', 'firefox', 'webkit']; |
| 28 | |
| 29 | /** @var list<string> */ |
| 30 | private readonly array $resolvedEngines; |
| 31 | |
| 32 | public function __construct( |
| 33 | private readonly BrowserOracle $oracle = new BrowserOracle(), |
| 34 | private readonly Rasteriser $rasteriser = new Rasteriser(), |
| 35 | private readonly ConsensusScorer $scorer = new ConsensusScorer(), |
| 36 | /** |
| 37 | * Engines to attempt for each test. Order doesn't matter; an |
| 38 | * unavailable engine is skipped silently and noted in the |
| 39 | * result. Defaults to all three Phase-A engines; overridable |
| 40 | * via the `PHPDFTK_CROSS_BROWSER_ENGINES` env var (comma- |
| 41 | * separated). Useful for skipping Firefox-via-Docker on |
| 42 | * macOS hosts where Rosetta blocks Firefox's software |
| 43 | * renderer (Phase A2 finding) — set |
| 44 | * `PHPDFTK_CROSS_BROWSER_ENGINES=chromium,webkit` and the |
| 45 | * harness skips Firefox entirely instead of paying the 60-s |
| 46 | * Docker timeout per fixture. |
| 47 | * |
| 48 | * @var list<string> |
| 49 | */ |
| 50 | ?array $engines = null, |
| 51 | /** |
| 52 | * Pass {@see ConsensusScorer::OURS_FUZZ_GEOMETRY} for |
| 53 | * pure-shape fixtures, {@see ConsensusScorer::OURS_FUZZ_TEXT} |
| 54 | * for text-bearing fixtures, or supply per-test overrides via |
| 55 | * the runner's per-call argument. |
| 56 | */ |
| 57 | private readonly float $defaultFuzzBudget = ConsensusScorer::OURS_FUZZ_GEOMETRY, |
| 58 | ) { |
| 59 | $envOverride = getenv('PHPDFTK_CROSS_BROWSER_ENGINES'); |
| 60 | if ($engines === null && is_string($envOverride) && $envOverride !== '') { |
| 61 | $engines = array_values(array_filter( |
| 62 | array_map('trim', explode(',', $envOverride)), |
| 63 | static fn(string $name) => in_array($name, self::ALL_ENGINES, true), |
| 64 | )); |
| 65 | } |
| 66 | $this->resolvedEngines = $engines ?? self::ALL_ENGINES; |
| 67 | } |
| 68 | |
| 69 | /** |
| 70 | * Run the oracle on a single test fixture. Returns an associative |
| 71 | * result the CLI / CI layer can format. |
| 72 | * |
| 73 | * `$fuzzBudget` overrides {@see self::$defaultFuzzBudget} for this |
| 74 | * test only — pass null to use the default. |
| 75 | * |
| 76 | * @return array{ |
| 77 | * testId: string, |
| 78 | * verdict: ConsensusVerdict, |
| 79 | * reason: string, |
| 80 | * consensus: list<string>, |
| 81 | * ourPng: string, |
| 82 | * enginePngs: array<string, string>, |
| 83 | * engineMissing: list<string>, |
| 84 | * pairs: array<string, array<string, float>>, |
| 85 | * ours: array<string, float>, |
| 86 | * renderMicros: float, |
| 87 | * } |
| 88 | */ |
| 89 | public function runOne( |
| 90 | string $testId, |
| 91 | string $testPath, |
| 92 | ?float $fuzzBudget = null, |
| 93 | ): array { |
| 94 | $budget = $fuzzBudget ?? $this->defaultFuzzBudget; |
| 95 | $start = hrtime(true); |
| 96 | |
| 97 | // Render ours via the in-process PHP renderer, then rasterise. |
| 98 | $oursPdf = $this->renderOurs($testPath); |
| 99 | $ourPng = $this->rasteriser->rasterise($oursPdf); |
| 100 | @unlink($oursPdf); |
| 101 | |
| 102 | $enginePngs = []; |
| 103 | $engineMissing = []; |
| 104 | foreach ($this->resolvedEngines as $engine) { |
| 105 | try { |
| 106 | $pdf = $this->oracle->render($engine, $testPath); |
| 107 | } catch (\Throwable $err) { |
| 108 | $engineMissing[] = $engine; |
| 109 | continue; |
| 110 | } |
| 111 | if ($pdf === null) { |
| 112 | $engineMissing[] = $engine; |
| 113 | continue; |
| 114 | } |
| 115 | try { |
| 116 | $enginePngs[$engine] = $this->rasteriser->rasterise($pdf); |
| 117 | } catch (\Throwable $err) { |
| 118 | $engineMissing[] = $engine; |
| 119 | } |
| 120 | } |
| 121 | |
| 122 | $score = $this->scorer->score($ourPng, $enginePngs, $budget); |
| 123 | $renderMicros = (hrtime(true) - $start) / 1000.0; |
| 124 | |
| 125 | return [ |
| 126 | 'testId' => $testId, |
| 127 | 'verdict' => $score['verdict'], |
| 128 | 'reason' => $score['reason'], |
| 129 | 'consensus' => $score['consensus'], |
| 130 | 'ourPng' => $ourPng, |
| 131 | 'enginePngs' => $enginePngs, |
| 132 | 'engineMissing' => $engineMissing, |
| 133 | 'pairs' => $score['pairs'], |
| 134 | 'ours' => $score['ours'], |
| 135 | 'renderMicros' => $renderMicros, |
| 136 | ]; |
| 137 | } |
| 138 | |
| 139 | /** |
| 140 | * Render a fixture through our PHP renderer to a temp PDF; returns |
| 141 | * the path. Caller unlinks. We don't go through `runOne()`'s |
| 142 | * cache because our renderer is in-process and cheap to re-run; |
| 143 | * caching the engine outputs is where the win is. |
| 144 | */ |
| 145 | private function renderOurs(string $testPath): string |
| 146 | { |
| 147 | $html = file_get_contents($testPath); |
| 148 | if ($html === false) { |
| 149 | throw new \RuntimeException("could not read fixture: $testPath"); |
| 150 | } |
| 151 | $opts = (new RendererOptions())->withBaseDir(dirname($testPath)); |
| 152 | $renderer = new Renderer($opts); |
| 153 | $writer = new PdfWriter(); |
| 154 | $renderer->renderInto($writer, $html); |
| 155 | $tmpPath = tempnam(sys_get_temp_dir(), 'xb_ours_') . '.pdf'; |
| 156 | file_put_contents($tmpPath, $writer->toBytes()); |
| 157 | return $tmpPath; |
| 158 | } |
| 159 | |
| 160 | /** |
| 161 | * Clean up rasterised PNGs from a result. Call after consuming the |
| 162 | * artefacts; the engine PDFs in the oracle cache are NOT removed. |
| 163 | */ |
| 164 | public function cleanupResult(array $result): void |
| 165 | { |
| 166 | foreach (array_merge([$result['ourPng']], array_values($result['enginePngs'])) as $path) { |
| 167 | if (is_string($path) && is_file($path)) { |
| 168 | @unlink($path); |
| 169 | } |
| 170 | } |
| 171 | } |
| 172 | } |