feat: render the bundled-scenarios list on the home page

src/Http/Handlers/GetHomePage.php

@@ -9,10 +9,15 @@ use BattleForge\Http\Response;
 
 final class GetHomePage
 {
+    public function __construct(private readonly string $scenariosDir = '')
+    {
+    }
+
     /** @param array<string, string> $params */
     public function handle(Request $request, array $params): Response
     {
         $csrf = $request->cookies['__csrf'] ?? '';
+        $bundled = $this->loadBundledScenarios();
 
         ob_start();
         require_once __DIR__ . '/../../Views/layout.php';
@@ -21,4 +26,35 @@ final class GetHomePage
 
         return Response::html(200, $body);
     }
+
+    /** @return list<array{id: string, name: string, summary: string}> */
+    private function loadBundledScenarios(): array
+    {
+        if ($this->scenariosDir === '' || !is_file($this->scenariosDir . '/manifest.json')) {
+            return [];
+        }
+        $decoded = json_decode((string) file_get_contents($this->scenariosDir . '/manifest.json'), true);
+        if (!is_array($decoded)) {
+            return [];
+        }
+        $entries = [];
+        foreach ($decoded as $id => $entry) {
+            if (!is_string($id) || !preg_match('/^[a-z0-9-]+$/', $id) || !is_array($entry)) {
+                continue;
+            }
+            if (!isset($entry['name'], $entry['summary'])) {
+                continue;
+            }
+            if (!is_file($this->scenariosDir . '/' . $id . '.json')) {
+                continue;
+            }
+            $entries[] = [
+                'id' => $id,
+                'name' => (string) $entry['name'],
+                'summary' => (string) $entry['summary'],
+            ];
+        }
+        usort($entries, static fn (array $a, array $b): int => strcmp($a['id'], $b['id']));
+        return $entries;
+    }
 }

src/Views/home.php

@@ -5,15 +5,26 @@ declare(strict_types=1);
 use BattleForge\Http\Escape;
 
 /** @var string $csrf Provided by the front controller. */
+/** @var list<array{id: string, name: string, summary: string}> $bundled Provided by GetHomePage. */
 ?><?php
-render_layout(static function () use ($csrf): void {
+render_layout(static function () use ($csrf, $bundled): void {
     $e = static fn (string $v): string => Escape::html($v);
     $a = static fn (string $v): string => Escape::attr($v);
     ?>
     <h1>BattleForge</h1>
     <p><a href="<?= $a('/scenarios/new/edit/team') ?>">New scenario</a></p>
+    <h2>Play bundled</h2>
+    <ul id="bf-bundled">
+    <?php foreach ($bundled as $entry) : ?>
+        <li>
+            <button type="button" data-bf-bundle="<?= $a($entry['id']) ?>">
+                <strong><?= $e($entry['name']) ?></strong> &mdash; <?= $e($entry['summary']) ?>
+            </button>
+        </li>
+    <?php endforeach; ?>
+    </ul>
     <h2>Recent scenarios</h2>
     <div id="recent"><p class="bf-empty">No saved scenarios yet.</p></div>
     <script type="module" src="<?= $a('/js/storage.js') ?>"></script>
     <?php
-}, $csrf, 'BattleForge');
+}, $csrf, 'BattleForge');

tests/Integration/GetHomePageTest.php

@@ -23,4 +23,37 @@ final class GetHomePageTest extends TestCase
         self::assertStringContainsString('default-src', $response->headers['Content-Security-Policy']);
         self::assertStringContainsString('<a href="/scenarios/new/edit/team">', $response->body);
     }
+
+    public function testItRendersTheBundledScenariosListFromTheManifest(): void
+    {
+        $tmpDir = sys_get_temp_dir() . '/bf-home-bundled-' . bin2hex(random_bytes(4));
+        mkdir($tmpDir, 0700, true);
+        file_put_contents(
+            $tmpDir . '/manifest.json',
+            json_encode([
+                'skirmish' => ['name' => 'Skirmish', 'summary' => 'Open ground.'],
+                'hold-the-line' => ['name' => 'Hold the Line', 'summary' => 'Defend.'],
+            ], JSON_THROW_ON_ERROR),
+        );
+        foreach (['skirmish.json', 'hold-the-line.json'] as $file) {
+            file_put_contents($tmpDir . '/' . $file, '{}');
+        }
+
+        $handler = new GetHomePage($tmpDir);
+        $request = new Request([], [], [], [], [], '', 'GET', '/', 'text/html', '');
+        $response = $handler->handle($request, []);
+
+        self::assertSame(200, $response->status);
+        self::assertStringContainsString('id="bf-bundled"', $response->body);
+        self::assertStringContainsString('data-bf-bundle="skirmish"', $response->body);
+        self::assertStringContainsString('data-bf-bundle="hold-the-line"', $response->body);
+        self::assertStringContainsString('Open ground.', $response->body);
+        self::assertStringContainsString('Defend.', $response->body);
+
+        unlink($tmpDir . '/manifest.json');
+        foreach (['skirmish.json', 'hold-the-line.json'] as $file) {
+            unlink($tmpDir . '/' . $file);
+        }
+        rmdir($tmpDir);
+    }
 }