Add cache duration configurability

config/markdown.php

@@ -45,6 +45,15 @@
      */
     'cache_store' => null,
 
+
+    /*
+     * When cache_store is enabled, this value will be used to determine
+     * how long the cache will be valid. If you set this to `null` the
+     * cache will never expire.
+     *
+     */
+    'cache_duration' => null,
+
     /*
      * This class will convert markdown to HTML
      *

docs/advanced-usage/caching-results.md

@@ -5,4 +5,8 @@ weight: 2
 
 Code highlighting is a resource intensive process. That's why the component ships with caching out of the box. By default, the component uses the default cache store.
 
-To configure the store to use, or to disable caching, change the value of the `cache_store` param in the `markdown` config file.
+To configure the store to use, or to disable caching, change the value of the `cache_store` param in the `markdown` config file. Caching is enabled by default.
+
+Additionally, you can set the duration for how long the results are stored in the cache
+by setting the `cache_duration` param in the `markdown` config file. By default the
+results will be cached forever if caching is enabled.

docs/installation-setup.md

@@ -71,6 +71,14 @@ return [
      */
     'cache_store' => null,
 
+    /*
+     * When cache_store is enabled, this value will be used to determine
+     * how long the cache will be valid. If you set this to `null` the
+     * cache will never expire.
+     *
+     */
+    'cache_duration' => null,
+
     /*
      * This class will convert markdown to HTML
      *
@@ -122,4 +130,3 @@ return [
     ],
 ];
 ```
-

src/MarkdownBladeComponent.php

@@ -31,6 +31,7 @@ public function toHtml(string $markdown): string
             blockRenderers: $config['block_renderers'],
             inlineRenderers: $config['inline_renderers'],
             inlineParsers: $config['inline_parsers'],
+            cacheDuration: $config['cache_duration'],
         );
 
         return $markdownRenderer->toHtml($markdown);

src/MarkdownRenderer.php

@@ -26,6 +26,7 @@ public function __construct(
         protected array $blockRenderers = [],
         protected array $inlineRenderers = [],
         protected array $inlineParsers = [],
+        protected int | null $cacheDuration = null,
     ) {
     }
 
@@ -64,6 +65,13 @@ public function cacheStoreName(string | bool | null $cacheStoreName): self
         return $this;
     }
 
+    public function cacheDuration(int | null $cacheDuration): self
+    {
+        $this->cacheDuration = $cacheDuration;
+
+        return $this;
+    }
+
     public function renderAnchors(bool $renderAnchors): self
     {
         $this->renderAnchors = $renderAnchors;
@@ -121,9 +129,15 @@ public function toHtml(string $markdown): string
 
         $cacheKey = $this->getCacheKey($markdown);
 
+        if($this->cacheDuration === null) {
+            return cache()->rememberForever($cacheKey, function () use ($markdown) {
+                return $this->convertMarkdownToHtml($markdown);
+            });
+        }
+
         return cache()
             ->store($this->cacheStoreName)
-            ->rememberForever($cacheKey, function () use ($markdown) {
+            ->remember($cacheKey, $this->cacheDuration, function () use ($markdown) {
                 return $this->convertMarkdownToHtml($markdown);
             });
     }

src/MarkdownServiceProvider.php

@@ -38,6 +38,7 @@ public function configurePackage(Package $package): void
                 blockRenderers: $config['block_renderers'],
                 inlineRenderers: $config['inline_renderers'],
                 inlineParsers: $config['inline_parsers'],
+                cacheDuration: $config['cache_duration'],
             );
         });
     }

tests/MarkdownBladeComponentTest.php

@@ -2,6 +2,7 @@
 
 namespace Spatie\LaravelMarkdown\Tests;
 
+use Carbon\Carbon;
 use League\CommonMark\Extension\GithubFlavoredMarkdownExtension;
 
 it('the component can render markdown', function () {
@@ -140,6 +141,36 @@
     expect(cache()->get($cacheKey))->not->toBeNull();
 });
 
+it('the component will cache results for the specified duration', function () {
+
+    $duration = 60;
+
+    config()->set('markdown.cache_duration', $duration);
+
+    $cacheKey = 'd1cd0dc15c848738f347cb539578252f';
+
+    $markdown = <<<BLADE
+        <x-markdown>
+        ```php
+        echo 'Hello world';
+        ```
+        </x-markdown>
+       BLADE;
+
+    expect(cache()->get($cacheKey))->toBeNull();
+    expect(config('markdown.cache_duration'))->toBe($duration);
+
+    (string)$this->blade($markdown);
+
+    expect(cache()->get($cacheKey))->not->toBeNull();
+
+    Carbon::setTestNow(now()->addSeconds($duration)->addSecond());
+
+    expect(cache()->get($cacheKey))->toBeNull();
+
+});
+
+
 it('caching can be disabled', function () {
     config()->set('markdown.cache_store', false);