[LiveComponent] Add 'live_action' twig function

src/LiveComponent/CHANGELOG.md

@@ -1,6 +1,7 @@
 # CHANGELOG
 
 -   Add `submitForm()` to `TestLiveComponent`.
+-   Add `live_action` Twig function
 
 ## 2.18.0
 

src/LiveComponent/composer.json

@@ -28,6 +28,7 @@
     "require": {
         "php": ">=8.1",
         "symfony/property-access": "^5.4.5|^6.0|^7.0",
+        "symfony/stimulus-bundle": "^2.9",
         "symfony/ux-twig-component": "^2.8",
         "twig/twig": "^3.8.0"
     },

src/LiveComponent/doc/index.rst

@@ -1106,6 +1106,17 @@ You can also add several "modifiers" to the action:
 The ``debounce(300)`` adds 300ms of "debouncing" before the action is executed.
 In other words, if you click really fast 5 times, only one Ajax request will be made!
 
+You can also use the ``live_action`` twig helper function to render the attributes:
+
+.. code-block:: html+twig
+
+    <button {{ live_action('resetMax') }}>Reset Min/Max</button>
+
+    {# with modifiers #}
+
+    <button {{ live_action('save', {}, {'debounce': 300}) }}>Save</button>
+
+
 Actions & Services
 ~~~~~~~~~~~~~~~~~~
 
@@ -1159,6 +1170,12 @@ You can also pass arguments to your action by adding each as a
         >Add Item</button>
     </form>
 
+    {# or #}
+
+    <form>
+        <button {{ live_action('addItem', {'id': item.id, 'itemName': 'CustomItem' })>Add Item</button>
+    </form>
+
 In your component, to allow each argument to be passed, add
 the ``#[LiveArg()]`` attribute::
 

src/LiveComponent/src/DependencyInjection/LiveComponentExtension.php

@@ -175,6 +175,7 @@ function (ChildDefinition $definition, AsLiveComponent $attribute) {
                 new Reference('ux.twig_component.component_factory'),
                 new Reference('router'),
                 new Reference('ux.live_component.metadata_factory'),
+                new Reference('stimulus.helper'),
             ])
             ->addTag('twig.runtime')
         ;

src/LiveComponent/src/Twig/LiveComponentExtension.php

@@ -25,6 +25,7 @@ public function getFunctions(): array
     {
         return [
             new TwigFunction('component_url', [LiveComponentRuntime::class, 'getComponentUrl']),
+            new TwigFunction('live_action', [LiveComponentRuntime::class, 'liveAction'], ['is_safe' => ['html_attr']]),
         ];
     }
 }

src/LiveComponent/src/Twig/LiveComponentRuntime.php

@@ -14,6 +14,7 @@
 use Symfony\Component\Routing\Generator\UrlGeneratorInterface;
 use Symfony\UX\LiveComponent\LiveComponentHydrator;
 use Symfony\UX\LiveComponent\Metadata\LiveComponentMetadataFactory;
+use Symfony\UX\StimulusBundle\Helper\StimulusHelper;
 use Symfony\UX\TwigComponent\ComponentFactory;
 
 /**
@@ -28,6 +29,7 @@ public function __construct(
         private ComponentFactory $factory,
         private UrlGeneratorInterface $urlGenerator,
         private LiveComponentMetadataFactory $metadataFactory,
+        private StimulusHelper $stimulusHelper,
     ) {
     }
 
@@ -45,4 +47,29 @@ public function getComponentUrl(string $name, array $props = []): string
 
         return $this->urlGenerator->generate($metadata->get('route'), $params, $metadata->get('url_reference_type'));
     }
+
+    public function liveAction(string $actionName, array $parameters = [], array $modifiers = [], ?string $event = null): string
+    {
+        $attributes = $this->stimulusHelper->createStimulusAttributes();
+
+        $modifiers = array_map(static function (string $key, mixed $value) {
+            return $value ? \sprintf('%s(%s)', $key, $value) : $key;
+        }, array_keys($modifiers), array_values($modifiers));
+
+        $parts = explode(':', $actionName);
+
+        $parameters['action'] = $modifiers ? \sprintf('%s|%s', implode('|', $modifiers), $parts[0]) : $parts[0];
+
+        array_shift($parts);
+
+        $name = 'action';
+
+        if (\count($parts) > 0) {
+            $name .= ':'.implode(':', $parts);
+        }
+
+        $attributes->addAction('live', $name, $event, $parameters);
+
+        return (string) $attributes;
+    }
 }

src/LiveComponent/tests/Fixtures/Kernel.php

@@ -31,6 +31,7 @@
 use Symfony\UX\LiveComponent\Tests\Fixtures\Component\Component1;
 use Symfony\UX\LiveComponent\Tests\Fixtures\Serializer\Entity2Normalizer;
 use Symfony\UX\LiveComponent\Tests\Fixtures\Serializer\MoneyNormalizer;
+use Symfony\UX\StimulusBundle\StimulusBundle;
 use Symfony\UX\TwigComponent\TwigComponentBundle;
 use Twig\Environment;
 use Twig\Loader\FilesystemLoader;
@@ -72,6 +73,7 @@ public function registerBundles(): iterable
         yield new SecurityBundle();
         yield new TwigComponentBundle();
         yield new LiveComponentBundle();
+        yield new StimulusBundle();
         yield new ZenstruckFoundryBundle();
     }
 

src/LiveComponent/tests/Unit/Twig/LiveComponentRuntimeTest.php

@@ -0,0 +1,44 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\UX\LiveComponent\Tests\Unit;
+
+use Symfony\Bundle\FrameworkBundle\Test\KernelTestCase;
+use Symfony\UX\LiveComponent\Twig\LiveComponentRuntime;
+
+final class LiveComponentRuntimeTest extends KernelTestCase
+{
+    public function testGetLiveAction(): void
+    {
+        $runtime = self::getContainer()->get('ux.live_component.twig.component_runtime');
+        \assert($runtime instanceof LiveComponentRuntime);
+
+        $props = $runtime->liveAction('action-name');
+        $this->assertSame('data-action="live#action" data-live-action-param="action-name"', $props);
+
+        $props = $runtime->liveAction('action-name', ['prop1' => 'val1', 'someProp' => 'val2']);
+        $this->assertSame('data-action="live#action" data-live-prop1-param="val1" data-live-some-prop-param="val2" data-live-action-param="action-name"', $props);
+
+        $props = $runtime->liveAction('action-name', ['prop1' => 'val1', 'prop2' => 'val2'], ['debounce' => 300]);
+        $this->assertSame('data-action="live#action" data-live-prop1-param="val1" data-live-prop2-param="val2" data-live-action-param="debounce(300)|action-name"', \html_entity_decode($props));
+        $this->assertSame('data-action="live#action" data-live-prop1-param="val1" data-live-prop2-param="val2" data-live-action-param="debounce&#x28;300&#x29;&#x7C;action-name"', $props);
+
+        $props = $runtime->liveAction('action-name:prevent', ['pro1' => 'val1', 'prop2' => 'val2'], ['debounce' => 300]);
+        $this->assertSame('data-action="live#action:prevent" data-live-pro1-param="val1" data-live-prop2-param="val2" data-live-action-param="debounce(300)|action-name"', \html_entity_decode($props));
+        $this->assertSame('data-action="live#action&#x3A;prevent" data-live-pro1-param="val1" data-live-prop2-param="val2" data-live-action-param="debounce&#x28;300&#x29;&#x7C;action-name"', $props);
+
+        $props = $runtime->liveAction('action-name:prevent', [], ['debounce' => 300]);
+        $this->assertSame('data-action="live#action:prevent" data-live-action-param="debounce(300)|action-name"', \html_entity_decode($props));
+
+        $props = $runtime->liveAction('action-name', [], [], 'keydown.esc');
+        $this->assertSame('data-action="keydown.esc->live#action" data-live-action-param="action-name"', \html_entity_decode($props));
+    }
+}