[FEATURE] Facilitate TCA overrides for dynamic Flux content types

Due to how TYPO3 treats TCA when compiling, several classes are
blacklisted and are simply not possible to use from within TCA files.
This forces Flux to use an event that triggers *after* TCA has been
compiled, from which to add the various Flux-specific content types
and their TCA.

Because of this, the TCA of Flux-based content types cannot be
modified from within TCA or TCA override files (they are loaded
before the Flux content type exists and once the Flux content
type is created, its TCA overrides the TCA created from files).

Therefore, Flux now implements a custom TCA override file
support where the TCA of dynamic Flux content types can be
overridden or manipulated in the same way standard TCA can.

Placing a file in your extension in Configuration/TCA/Flux, e.g.
Configuration/TCA/Flux/tt_content.php will load those files
after the Flux content types are registered. The files follow the
same approach as a TCA override file (does not return an array,
modifies $GLOBALS['TCA'] directly or uses core's assistance
methods such as ExtensionManagementUtility::addToAllTCAtypes.

Close: #2064

Classes/Integration/Configuration/SpooledConfigurationApplicator.php

@@ -16,8 +16,10 @@
 use FluidTYPO3\Flux\Provider\Provider;
 use FluidTYPO3\Flux\Provider\ProviderInterface;
 use FluidTYPO3\Flux\Utility\ExtensionNamingUtility;
+use Symfony\Component\Finder\Finder;
 use TYPO3\CMS\Core\Core\ApplicationContext;
 use TYPO3\CMS\Core\Core\Environment;
+use TYPO3\CMS\Core\Package\PackageManager;
 use TYPO3\CMS\Core\Utility\GeneralUtility;
 use TYPO3\CMS\Core\Utility\VersionNumberUtility;
 use TYPO3Fluid\Fluid\Exception;
@@ -27,15 +29,18 @@ class SpooledConfigurationApplicator
     private ContentTypeBuilder $contentTypeBuilder;
     private ContentTypeManager $contentTypeManager;
     private RequestBuilder $requestBuilder;
+    private PackageManager $packageManager;
 
     public function __construct(
         ContentTypeBuilder $contentTypeBuilder,
         ContentTypeManager $contentTypeManager,
-        RequestBuilder $requestBuilder
+        RequestBuilder $requestBuilder,
+        PackageManager $packageManager
     ) {
         $this->contentTypeBuilder = $contentTypeBuilder;
         $this->contentTypeManager = $contentTypeManager;
         $this->requestBuilder = $requestBuilder;
+        $this->packageManager = $packageManager;
     }
 
     public function processData(): void
@@ -55,6 +60,28 @@ public function processData(): void
 
         $this->spoolQueuedContentTypeRegistrations(Core::getQueuedContentTypeRegistrations());
         Core::clearQueuedContentTypeRegistrations();
+
+        $scopedRequire = static function (string $filename): void {
+            require $filename;
+        };
+
+        $activePackages = $this->packageManager->getActivePackages();
+        foreach ($activePackages as $package) {
+            try {
+                $finder = Finder::create()
+                    ->files()
+                    ->sortByName()
+                    ->depth(0)
+                    ->name('*.php')
+                    ->in($package->getPackagePath() . 'Configuration/TCA/Flux');
+            } catch (\InvalidArgumentException $e) {
+                // No such directory in this package
+                continue;
+            }
+            foreach ($finder as $fileInfo) {
+                $scopedRequire($fileInfo->getPathname());
+            }
+        }
     }
 
     private function spoolQueuedContentTypeTableConfigurations(array $queue): void

Tests/Unit/Integration/Configuration/SpooledConfigurationApplicatorTest.php

@@ -21,6 +21,7 @@
 use FluidTYPO3\Flux\Tests\Fixtures\Classes\DummyConfigurationProvider;
 use FluidTYPO3\Flux\Tests\Unit\AbstractTestCase;
 use TYPO3\CMS\Core\Core\ApplicationContext;
+use TYPO3\CMS\Core\Package\PackageManager;
 use TYPO3Fluid\Fluid\Exception;
 use TYPO3Fluid\Fluid\View\ViewInterface;
 
@@ -32,6 +33,7 @@ class SpooledConfigurationApplicatorTest extends AbstractTestCase
     private ContentTypeBuilder $contentTypeBuilder;
     private ContentTypeManager $contentTypeManager;
     private RequestBuilder $requestBuilder;
+    private PackageManager $packageManager;
 
     protected function setUp(): void
     {
@@ -81,13 +83,20 @@ protected function setUp(): void
 
         $this->requestBuilder = $this->getMockBuilder(RequestBuilder::class)->disableOriginalConstructor()->getMock();
 
+        $this->packageManager = $this->getMockBuilder(PackageManager::class)
+            ->onlyMethods(['getActivePackages'])
+            ->disableOriginalConstructor()
+            ->getMock();
+        $this->packageManager->method('getActivePackages')->willReturn([]);
+
         $this->subject = $this->getMockBuilder(SpooledConfigurationApplicator::class)
             ->onlyMethods(['getApplicationContext', 'getContentTypeManager'])
             ->setConstructorArgs(
                 [
                     $this->contentTypeBuilder,
                     $this->contentTypeManager,
                     $this->requestBuilder,
+                    $this->packageManager,
                 ]
             )
             ->getMock();