[TwigComponent][LiveComponent] Fix Live embedded component within namespaced template

src/LiveComponent/tests/Functional/EventListener/LiveComponentSubscriberTest.php

@@ -311,6 +311,45 @@ public function testItUseBlocksFromEmbeddedContextUsingMultipleComponents(): voi
         ;
     }
 
+    public function testItUseBlocksFromEmbeddedContextUsingMultipleComponentsWithNamespacedTemplate(): void
+    {
+        $templateName = 'render_multiple_embedded_with_blocks.html.twig';
+        $obscuredName = '5c474b02358c46cca3da7340cc79cc2e';
+
+        $this->addTemplateMap($obscuredName, $templateName);
+
+        $dehydrated = $this->dehydrateComponent(
+            $this->mountComponent(
+                'component2',
+                [
+                    'data-host-template' => $obscuredName,
+                    'data-embedded-template-index' => self::DETERMINISTIC_ID_MULTI_2,
+                ]
+            )
+        );
+
+        $token = null;
+
+        $this->browser()
+            ->visit('/render-namespaced-template/render_multiple_embedded_with_blocks')
+            ->assertSuccessful()
+            ->assertSeeIn('#component1', 'Overridden content from component 1')
+            ->assertSeeIn('#component2', 'Overridden content from component 2 on same line - count: 1')
+            ->assertSeeIn('#component3', 'PreReRenderCalled: No')
+            ->use(function (Crawler $crawler) use (&$token) {
+                // get a valid token to use for actions
+                $token = $crawler->filter('div')->eq(1)->attr('data-live-csrf-value');
+            })
+            ->post('/_components/component2/increase', [
+                'headers' => ['X-CSRF-TOKEN' => $token],
+                'body' => ['data' => json_encode(['props' => $dehydrated->getProps()])],
+            ])
+            ->assertSuccessful()
+            ->assertHeaderContains('Content-Type', 'html')
+            ->assertSee('Overridden content from component 2 on same line - count: 2')
+        ;
+    }
+
     public function testCanRedirectFromComponentAction(): void
     {
         $dehydrated = $this->dehydrateComponent($this->mountComponent('component2'));

src/TwigComponent/src/Twig/ComponentNode.php

@@ -68,7 +68,7 @@ public function compile(Compiler $compiler): void
             ->raw('), ')
             ->raw($this->getAttribute('only') ? '[]' : '$context')
             ->raw(', ')
-            ->string($this->parseTemplateName($this->getAttribute('name')))
+            ->string(TemplateNameParser::parse($this->getAttribute('name')))
             ->raw(', ')
             ->raw($this->getAttribute('index'))
             ->raw(");\n")
@@ -91,20 +91,4 @@ public function compile(Compiler $compiler): void
             ->raw("\n")
         ;
     }
-
-    /**
-     * Copied from Twig\Loader\FilesystemLoader, and adjusted to needs for this class.
-     */
-    private function parseTemplateName(string $name): mixed
-    {
-        if (isset($name[0]) && '@' == $name[0]) {
-            if (false === $pos = strpos($name, '/')) {
-                throw new \LogicException(sprintf('Malformed namespaced template name "%s" (expecting "@namespace/template_name").', $name));
-            }
-
-            return substr($name, $pos + 1);
-        }
-
-        return $name;
-    }
 }

src/TwigComponent/src/Twig/ComponentTokenParser.php

@@ -87,7 +87,7 @@ public function parse(Token $token): Node
         $this->parser->embedTemplate($module);
 
         // use deterministic index for the embedded template, so it can be loaded in a controlled manner
-        $module->setAttribute('index', $this->generateEmbeddedTemplateIndex($stream->getSourceContext()->getName(), $token->getLine()));
+        $module->setAttribute('index', $this->generateEmbeddedTemplateIndex(TemplateNameParser::parse($stream->getSourceContext()->getName()), $token->getLine()));
 
         $stream->expect(Token::BLOCK_END_TYPE);
 

src/TwigComponent/src/Twig/TemplateNameParser.php

@@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Symfony\UX\TwigComponent\Twig;
+
+final class TemplateNameParser
+{
+    /**
+     * Copied from Twig\Loader\FilesystemLoader, and adjusted to needs for this class (no namespace returned).
+     *
+     * @see \Twig\Loader\FilesystemLoader::parseName
+     */
+    public static function parse(string $name): mixed
+    {
+        if (isset($name[0]) && '@' == $name[0]) {
+            if (false === $pos = strpos($name, '/')) {
+                throw new \LogicException(sprintf('Malformed namespaced template name "%s" (expecting "@namespace/template_name").', $name));
+            }
+
+            return substr($name, $pos + 1);
+        }
+
+        return $name;
+    }
+}