first version passing tests in Flow 8.3

.woodpecker/code-style.yml

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+steps:
+  code-style:
+    image: composer
+    commands:
+      - composer global config repositories.repo-name vcs https://git.digital-competence.de/Packages/php-codesniffer
+      - composer global config --no-plugins allow-plugins.dealerdirect/phpcodesniffer-composer-installer true
+      - composer global require digicomp/php-codesniffer:@dev
+      - composer global exec -- phpcs --runtime-set ignore_warnings_on_exit 1 --standard=DigiComp Classes/ Tests/
+    when:
+      - event: [push, pull_request, manual]

.woodpecker/functional-tests.yml

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+workspace:
+  base: /woodpecker
+  path: package
+
+matrix:
+  include:
+    - FLOW_VERSION: 6.3
+      PHP_VERSION: 7.4
+    - FLOW_VERSION: 7.3
+      PHP_VERSION: 7.4
+    - FLOW_VERSION: 7.3
+      PHP_VERSION: 8.2
+    - FLOW_VERSION: 8.2
+      PHP_VERSION: 8.2
+
+steps:
+  functional-tests:
+    image: "thecodingmachine/php:${PHP_VERSION}-v4-cli"
+    environment:
+      # Enable the PDO_SQLITE extension
+      - "PHP_EXTENSION_PDO_SQLITE=1"
+      - "FLOW_VERSION=${FLOW_VERSION}"
+      - "NEOS_BUILD_DIR=/woodpecker/Build-${FLOW_VERSION}"
+    commands:
+      - "sudo mkdir $NEOS_BUILD_DIR"
+      - "sudo chown -R docker:docker $NEOS_BUILD_DIR"
+      - "cd $NEOS_BUILD_DIR"
+      - "composer create-project --no-install neos/flow-base-distribution:^$FLOW_VERSION ."
+      - "composer config repositories.repo-name path /woodpecker/package"
+      - "composer remove --dev --no-update neos/behat || composer remove --no-update neos/behat"
+      - "composer require digicomp/fluid-currentcontroller-expression:@dev"
+      - "bin/phpunit --configuration Build/BuildEssentials/PhpUnit/FunctionalTests.xml Packages/Application/DigiComp.FluidCurrentControllerExpression/Tests/Functional"
+    when:
+      - event: [ push, pull_request, manual ]

Classes/CurrentControllerExpressionNode.php

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+<?php
+
+declare(strict_types=1);
+
+namespace DigiComp\FluidCurrentControllerExpression;
+
+use Neos\FluidAdaptor\Core\Rendering\RenderingContext;
+use Neos\Utility\ObjectAccess;
+use TYPO3Fluid\Fluid\Core\Parser\SyntaxTree\Expression\AbstractExpressionNode;
+use TYPO3Fluid\Fluid\Core\Parser\SyntaxTree\Expression\ExpressionNodeInterface;
+use TYPO3Fluid\Fluid\Core\Rendering\RenderingContextInterface;
+
+class CurrentControllerExpressionNode extends AbstractExpressionNode implements ExpressionNodeInterface
+{
+    /**
+     * note: this could be readonly in PHP8
+     * @var string
+     */
+    public static string $detectionExpression = '/{currentController:([a-z0-9]+)}/i';
+
+    public static function evaluateExpression(RenderingContextInterface $renderingContext, $expression, array $matches)
+    {
+        if ($renderingContext instanceof RenderingContext) {
+            $propertyToReturn = $matches[1];
+            if (
+                \in_array(
+                    $propertyToReturn,
+                    ['actionName', 'name', 'objectName', 'packageKey', 'subpackageKey'],
+                    true
+                )
+            ) {
+                $propertyToReturn = 'controller' . \ucfirst($propertyToReturn);
+            }
+            return ObjectAccess::getProperty(
+                $renderingContext->getControllerContext()->getRequest(),
+                $propertyToReturn
+            );
+        }
+        return '';
+    }
+}

Configuration/Objects.yaml

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+Neos\FluidAdaptor\Core\Rendering\RenderingContext:
+  properties:
+    expressionNodeTypes:
+      value:
+        - Neos\FluidAdaptor\Core\Parser\SyntaxTree\Expression\LegacyNamespaceExpressionNode
+        - TYPO3Fluid\Fluid\Core\Parser\SyntaxTree\Expression\CastingExpressionNode
+        - TYPO3Fluid\Fluid\Core\Parser\SyntaxTree\Expression\MathExpressionNode
+        - TYPO3Fluid\Fluid\Core\Parser\SyntaxTree\Expression\TernaryExpressionNode
+        - DigiComp\FluidCurrentControllerExpression\CurrentControllerExpressionNode

Configuration/Testing/Views.yaml

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+-
+  requestFilter: 'isFormat("html") && isPackage("DigiComp.FluidCurrentControllerExpression")'
+  options:
+    layoutRootPaths:
+      - "resource://DigiComp.FluidCurrentControllerExpression/Private/Layouts"
+    partialRootPaths:
+      - "resource://DigiComp.FluidCurrentControllerExpression/Private/Partials"

Resources/Private/Layouts/Test.html

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+<f:render section="Content" />

Resources/Private/Templates/Tests/Functional/Fixtures/Test/Index.html

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+{currentController:name}
+{currentController:actionName}
+{currentController:packageKey}
+{currentController:subpackageKey}
+{currentController:objectName}
+{currentController:format}

Resources/Private/Templates/Tests/Functional/Fixtures/Test/WithLayout.html

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+<f:layout name="Test" />
+<f:section name="Content">{currentController:name}
+{currentController:actionName}
+{currentController:packageKey}
+{currentController:subpackageKey}
+{currentController:objectName}
+{currentController:format}</f:section>

Tests/Functional/CurrentControllerExpressionNodeTest.php

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+<?php
+
+declare(strict_types=1);
+
+namespace DigiComp\FluidCurrentControllerExpression\Tests\Functional;
+
+use Neos\Flow\Mvc\Routing\Route;
+use Neos\Flow\Tests\FunctionalTestCase;
+
+class CurrentControllerExpressionNodeTest extends FunctionalTestCase
+{
+    /**
+     * @var \Neos\Flow\Http\Client\Browser
+     */
+    protected $browser;
+
+    /**
+     * Initializer
+     */
+    protected function setUp(): void
+    {
+        parent::setUp();
+
+        $route = new Route();
+        $route->setUriPattern('test/currentcontrollerexpressions/test(/{@action})');
+        $route->setDefaults([
+            '@package' => 'DigiComp.FluidCurrentControllerExpression',
+            '@subpackage' => 'Tests\Functional\Fixtures',
+            '@controller' => 'Test',
+            '@action' => 'index',
+        ]);
+        $route->setAppendExceedingArguments(true);
+        $this->router->addRoute($route);
+    }
+
+    /**
+     * @test
+     */
+    public function itReturnsCurrentControllerInformations(): void
+    {
+        $response = $this->browser->request('http://localhost/test/currentcontrollerexpressions/test');
+        static::assertEquals(
+            'Test
+index
+DigiComp.FluidCurrentControllerExpression
+Tests\Functional\Fixtures
+DigiComp\FluidCurrentControllerExpression\Tests\Functional\Fixtures\Controller\TestController
+html
+',
+            (string)$response->getBody()
+        );
+
+        $response = $this->browser->request('http://localhost/test/currentcontrollerexpressions/test/withlayout');
+        static::assertEquals(
+            'Test
+withLayout
+DigiComp.FluidCurrentControllerExpression
+Tests\Functional\Fixtures
+DigiComp\FluidCurrentControllerExpression\Tests\Functional\Fixtures\Controller\TestController
+html
+',
+            (string)$response->getBody()
+        );
+    }
+}

Tests/Functional/Fixtures/Controller/TestController.php

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+<?php
+
+declare(strict_types=1);
+
+namespace DigiComp\FluidCurrentControllerExpression\Tests\Functional\Fixtures\Controller;
+
+use Neos\Flow\Mvc\Controller\ActionController;
+
+class TestController extends ActionController
+{
+    public function indexAction()
+    {
+    }
+
+    public function withLayoutAction()
+    {
+    }
+}

composer.json

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+{
+    "name": "digicomp/fluid-currentcontroller-expression",
+    "type": "neos-package",
+    "description": "",
+    "require": {
+        "php": "^7.4 | ^8.1",
+        "neos/flow": "^6.3 | ^7.3 | ^8.2",
+        "neos/fluid-adaptor": "^6.3 | ^7.3 | ^8.3"
+    },
+    "extra":{
+        "branch-alias": {
+            "dev-develop": "1.0.x-dev"
+        }
+    },
+    "autoload": {
+        "psr-4": {
+            "DigiComp\\FluidCurrentControllerExpression\\": "Classes/"
+        }
+    }
+}