fix: harden the Divi BlockTree against opaque/invalid writes

Final fix wave for stage 2a, load-bearing for 2b's writers:
- Block::setAttrs()/Container::insertChild()/removeChild() refuse on an opaque
  block (undecodable attrs or a global module) instead of silently corrupting it.
- Container::append() is now @internal (Parser only) and refuses on a void
  block, so a child can no longer be silently dropped from the serialized output.
- Block::create() validates the block name against namespace/block-name.
- Json::decodeObject() returns null (-> opaque) for a top-level object whose
  keys are a plain list ("0","1",...) rather than returning [] and letting the
  Serializer re-encode it as a corrupting JSON array.
- AttrMap::set() rejects empty path segments and keeps an existing stdClass
  value an object when rewrapping it (no silent object->list flip); AttrMap::get()
  is updated in step so it can still read back through such an object.
- Block::copy() deep-clones stdClass attribute values instead of sharing them.
- Json::encode()'s existing JsonException-on-invalid-UTF-8 behaviour is documented.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
This commit is contained in:
2026-09-26 13:12:49 +02:00
co-authored by Claude Opus 5.5
parent f433fef8f7
commit 4137882008
10 changed files with 339 additions and 7 deletions
@@ -0,0 +1,54 @@
<?php
declare(strict_types=1);
namespace LIT\MCP\Tests\Unit\Integrations\Divi\BlockTree;
use LIT\MCP\Integrations\Divi\BlockTree\Block;
use LIT\MCP\Integrations\Divi\BlockTree\Parser;
use LogicException;
use PHPUnit\Framework\TestCase;
final class ContainerTest extends TestCase
{
public function testInsertChildRefusesOnAnOpaqueBlock(): void
{
$document = (new Parser())->parse('<!-- wp:divi/section {"globalModule":"x"} --><!-- /wp:divi/section -->');
$section = $document->children()[0];
self::assertTrue($section->isOpaque());
$this->expectException(LogicException::class);
$section->insertChild(0, Block::create('divi/text'));
}
public function testInsertChildRefusesOnABlockWithUndecodableAttrs(): void
{
$document = (new Parser())->parse('<!-- wp:divi/section {"a":} --><!-- /wp:divi/section -->');
$section = $document->children()[0];
self::assertTrue($section->isOpaque());
$this->expectException(LogicException::class);
$section->insertChild(0, Block::create('divi/text'));
}
public function testRemoveChildRefusesOnAnOpaqueBlock(): void
{
$document = (new Parser())->parse(
'<!-- wp:divi/section {"globalModule":"x"} --><!-- wp:divi/row --><!-- /wp:divi/row --><!-- /wp:divi/section -->'
);
$section = $document->children()[0];
$row = $section->children()[0];
self::assertTrue($section->isOpaque());
$this->expectException(LogicException::class);
$section->removeChild($row);
}
public function testAppendRefusesOnAVoidBlock(): void
{
$void = Block::parsed('divi/image', [], '<!-- wp:divi/image /-->', true, false);
$this->expectException(LogicException::class);
$void->append('text');
}
}