From 06a5bf532f753cf5138e7a48d45c75a4d0a2e409 Mon Sep 17 00:00:00 2001
From: Hugo Alliaume <hugo@alliau.me>
Date: Sat, 13 Jan 2024 14:00:44 +0100
Subject: [PATCH] =?UTF-8?q?[TwigComponent]=C2=A0Fix=20usage=20of=20{%=20em?=
 =?UTF-8?q?bed=20%}=20with=20{%=20block=20%}=20in=20<twig:>=20components,?=
 =?UTF-8?q?=20close=20#952?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/TwigComponent/src/Twig/TwigPreLexer.php   | 41 +++++++++++++++++--
 .../tests/Unit/TwigPreLexerTest.php           | 39 ++++++++++++++++++
 2 files changed, 76 insertions(+), 4 deletions(-)

diff --git a/src/TwigComponent/src/Twig/TwigPreLexer.php b/src/TwigComponent/src/Twig/TwigPreLexer.php
index fe4e7d2c680..13b4ceb5470 100644
--- a/src/TwigComponent/src/Twig/TwigPreLexer.php
+++ b/src/TwigComponent/src/Twig/TwigPreLexer.php
@@ -12,6 +12,7 @@
 namespace Symfony\UX\TwigComponent\Twig;
 
 use Twig\Error\SyntaxError;
+use Twig\Lexer;
 
 /**
  * Rewrites <twig:component> syntaxes to {% component %} syntaxes.
@@ -42,6 +43,8 @@ public function preLexComponents(string $input): string
         $this->length = \strlen($input);
         $output = '';
 
+        $inTwigEmbed = false;
+
         while ($this->position < $this->length) {
             // ignore content inside verbatim block #947
             if ($this->consume('{% verbatim %}')) {
@@ -67,24 +70,54 @@ public function preLexComponents(string $input): string
                 }
             }
 
+            if ($this->consume('{% embed')) {
+                $inTwigEmbed = true;
+                $output .= '{% embed';
+                $output .= $this->consumeUntil('%}');
+
+                continue;
+            }
+
+            if ($this->consume('{% endembed %}')) {
+                $inTwigEmbed = false;
+                $output .= '{% endembed %}';
+
+                continue;
+            }
+
             $isTwigHtmlOpening = $this->consume('<twig:');
             $isTraditionalBlockOpening = false;
+
             if ($isTwigHtmlOpening || (0 !== \count($this->currentComponents) && $isTraditionalBlockOpening = $this->consume('{% block'))) {
                 $componentName = $isTraditionalBlockOpening ? 'block' : $this->consumeComponentName();
 
                 if ('block' === $componentName) {
                     // if we're already inside the "default" block, let's close it
-                    if (!empty($this->currentComponents) && $this->currentComponents[\count($this->currentComponents) - 1]['hasDefaultBlock']) {
+                    if (!empty($this->currentComponents) && $this->currentComponents[\count($this->currentComponents) - 1]['hasDefaultBlock'] && !$inTwigEmbed) {
                         $output .= '{% endblock %}';
 
                         $this->currentComponents[\count($this->currentComponents) - 1]['hasDefaultBlock'] = false;
                     }
 
                     if ($isTraditionalBlockOpening) {
+                        $prevPosition = $this->position;
+
                         // add what we've consumed so far
                         $output .= '{% block';
                         $output .= $this->consumeUntil('%}');
-                        $output .= $this->consumeUntilEndBlock();
+
+                        // If the last consumed string does not match the Twig's block name regex, we assume the block is self-closing
+                        $isBlockSelfClosing = '' !== preg_replace(
+                            Lexer::REGEX_NAME,
+                            '',
+                            trim(mb_substr($this->input, $prevPosition, $this->position - $prevPosition)))
+                        ;
+
+                        if ($isBlockSelfClosing && $this->consume('%}')) {
+                            $output .= '%}';
+                        } else {
+                            $output .= $this->consumeUntilEndBlock();
+                        }
 
                         continue;
                     }
@@ -420,8 +453,8 @@ private function consumeUntilEndBlock(): string
 
             if (!$inComment && '{% endblock %}' === substr($this->input, $this->position, 14)) {
                 if (1 === $depth) {
-                    // in this case, we want to advanced ALL the way beyond the endblock
-                    $this->position += 14;
+                    // in this case, we want to advance ALL the way beyond the endblock
+                    $this->position += 14 /* strlen('{% endblock %}') */;
                     break;
                 } else {
                     --$depth;
diff --git a/src/TwigComponent/tests/Unit/TwigPreLexerTest.php b/src/TwigComponent/tests/Unit/TwigPreLexerTest.php
index 99b88c7801b..2674b84fb2b 100644
--- a/src/TwigComponent/tests/Unit/TwigPreLexerTest.php
+++ b/src/TwigComponent/tests/Unit/TwigPreLexerTest.php
@@ -183,6 +183,45 @@ public static function getLexTests(): iterable
             EOF
         ];
 
+        yield 'component_where_entire_default_block_is_twig_embed' => [
+            <<<EOF
+            <twig:Alert>
+                <p>
+                    {% embed "my_embed.html.twig" with { foo: 'bar' } %}{% endembed %}
+                </p>
+            </twig:Alert>
+            EOF,
+            <<<EOF
+            {% component 'Alert' %}
+                {% block content %}<p>
+                    {% embed "my_embed.html.twig" with { foo: 'bar' } %}{% endembed %}
+                </p>
+            {% endblock %}{% endcomponent %}
+            EOF,
+        ];
+        yield 'component_where_entire_default_block_is_twig_embed_with_blocks' => [
+            <<<EOF
+            <twig:Alert>
+                <p>
+                    {% embed "my_embed.html.twig" %}
+                        {% block my_embed_block_1 "foo" %}
+                        {% block my_embed_block_2 %}bar{% endblock %}
+                    {% endembed %}
+                </p>
+            </twig:Alert>
+            EOF,
+            <<<EOF
+            {% component 'Alert' %}
+                {% block content %}<p>
+                    {% embed "my_embed.html.twig" %}
+                        {% block my_embed_block_1 "foo" %}
+                        {% block my_embed_block_2 %}bar{% endblock %}
+                    {% endembed %}
+                </p>
+            {% endblock %}{% endcomponent %}
+            EOF,
+        ];
+
         yield 'string_inside_of_twig_code_not_escaped' => [
             <<<EOF
             <twig:TabbedCodeBlocks :files="[