New storage core component

config/components.php

@@ -4,8 +4,11 @@
 use Kirby\Cms\Collection;
 use Kirby\Cms\File;
 use Kirby\Cms\FileVersion;
+use Kirby\Cms\ModelWithContent;
 use Kirby\Cms\Page;
 use Kirby\Cms\User;
+use Kirby\Content\PlainTextStorage;
+use Kirby\Content\Storage;
 use Kirby\Data\Data;
 use Kirby\Email\PHPMailer as Emailer;
 use Kirby\Exception\NotFoundException;
@@ -301,6 +304,16 @@
 		return Snippet::factory($name, $data, $slots);
 	},
 
+	/**
+	 * Create a new storage object for the given model
+	 */
+	'storage' => function (
+		App $kirby,
+		ModelWithContent $model
+	): Storage {
+		return new PlainTextStorage(model: $model);
+	},
+
 	/**
 	 * Add your own template engine
 	 *

src/Cms/App.php

@@ -4,6 +4,7 @@
 
 use Closure;
 use Generator;
+use Kirby\Content\Storage;
 use Kirby\Data\Data;
 use Kirby\Email\Email as BaseEmail;
 use Kirby\Exception\ErrorPageException;
@@ -1616,6 +1617,14 @@ public function snippet(
 		return null;
 	}
 
+	/**
+	 * Returns the default storage instance for a given Model
+	 */
+	public function storage(ModelWithContent $model): Storage
+	{
+		return $this->component('storage')($this, $model);
+	}
+
 	/**
 	 * System check class
 	 */

src/Cms/ModelWithContent.php

@@ -6,7 +6,6 @@
 use Kirby\Content\Content;
 use Kirby\Content\ContentTranslation;
 use Kirby\Content\Lock;
-use Kirby\Content\PlainTextStorage;
 use Kirby\Content\Storage;
 use Kirby\Content\Version;
 use Kirby\Content\VersionId;
@@ -547,7 +546,7 @@ public function site(): Site
 	 */
 	public function storage(): Storage
 	{
-		return $this->storage ??= new PlainTextStorage(model: $this);
+		return $this->storage ??= $this->kirby()->storage($this);
 	}
 
 	/**

tests/Cms/App/AppComponentsTest.php

@@ -3,6 +3,8 @@
 namespace Kirby\Cms;
 
 use Kirby\Content\Field;
+use Kirby\Content\MemoryStorage;
+use Kirby\Content\PlainTextStorage;
 use Kirby\Email\Email;
 use Kirby\Exception\NotFoundException;
 use Kirby\Filesystem\F;
@@ -346,6 +348,37 @@ public function testSnippet()
 		$app->snippet('variable', ['message' => 'test'], false);
 	}
 
+	public function testStorage()
+	{
+		$this->app = $this->app->clone([
+			'site' => [
+				'children' => [
+					['slug' => 'test']
+				]
+			]
+		]);
+
+		$this->assertInstanceOf(PlainTextStorage::class, $this->app->storage($this->app->page('test')));
+	}
+
+	public function testStorageWithModifiedComponent()
+	{
+		$this->app = $this->app->clone([
+			'components' => [
+				'storage' => function (App $app, ModelWithContent $model) {
+					return new MemoryStorage($model);
+				}
+			],
+			'site' => [
+				'children' => [
+					['slug' => 'test']
+				]
+			]
+		]);
+
+		$this->assertInstanceOf(MemoryStorage::class, $this->app->storage($this->app->page('test')));
+	}
+
 	public function testTemplate()
 	{
 		$this->assertInstanceOf(Template::class, $this->app->template('default'));