From faa217ce1bcfac341f75b5b199e777038fab9f46 Mon Sep 17 00:00:00 2001
From: Alexander Opitz <opitz@extrameile.agency>
Date: Wed, 11 May 2022 16:23:01 +0200
Subject: [PATCH] [FEATURE] General: ChildTemplate - Processing

If childTemplate configuration in mapping exists, it will be used to
overwrite values from default mapping and used for followup rendering.

Related: #364
Release: 8.0.0
---
 .../Frontend/FrontendController.php           | 32 +++++++++++++++++--
 Classes/Utility/ApiHelperUtility.php          | 31 ++++++++++++++++++
 2 files changed, 60 insertions(+), 3 deletions(-)

diff --git a/Classes/Controller/Frontend/FrontendController.php b/Classes/Controller/Frontend/FrontendController.php
index 31f9caece..18a5676f5 100644
--- a/Classes/Controller/Frontend/FrontendController.php
+++ b/Classes/Controller/Frontend/FrontendController.php
@@ -83,12 +83,12 @@ public function renderPage($content, $conf)
             );
         }
 
-        return $this->renderElement($pageRecord, 'pages');
+        return $this->renderElement($pageRecord, 'pages', $conf);
     }
 
     public function renderContent($content, $conf)
     {
-        return $this->renderElement($this->cObj->data, 'tt_content');
+        return $this->renderElement($this->cObj->data, 'tt_content', $conf);
     }
 
     /**
@@ -102,10 +102,14 @@ public function renderContent($content, $conf)
      *
      * @return string HTML output.
      */
-    public function renderElement($row, $table)
+    public function renderElement($row, $table, array $conf)
     {
         try {
             $mappingConfiguration = ApiHelperUtility::getMappingConfiguration($row['tx_templavoilaplus_map']);
+
+            $childsSelection = $this->getChildsSelection($conf);
+            $mappingConfiguration = ApiHelperUtility::getOverloadedMappingConfiguration($mappingConfiguration, $childsSelection);
+
             // getDS from Mapping
             $dataStructure = ApiHelperUtility::getDataStructure($mappingConfiguration->getCombinedDataStructureIdentifier());
 
@@ -192,4 +196,26 @@ public function processDataValues(array $dataValues, array $DSelements, $valueKe
 
         return $processedDataValues;
     }
+
+    private function getChildsSelection(array $tsConf): array
+    {
+        $childSelection = [];
+
+        if ($tsConf['childTemplate']) {
+            $renderType = $tsConf['childTemplate'];
+            if (substr($renderType, 0, 9) === 'USERFUNC:') {
+                $conf = [
+                    'conf' => is_array($tsConf['childTemplate.']) ? $tsConf['childTemplate.'] : [],
+                    'toRecord' => $row,
+                ];
+                $renderType = GeneralUtility::callUserFunction(substr($renderType, 9), $conf, $this);
+            }
+            $childSelection[] = $renderType;
+        }
+        if (GeneralUtility::_GP('print')) {
+            $childSelection[] = 'print';
+        }
+
+        return $childSelection;
+    }
 }
diff --git a/Classes/Utility/ApiHelperUtility.php b/Classes/Utility/ApiHelperUtility.php
index 4c724b438..008c7774d 100644
--- a/Classes/Utility/ApiHelperUtility.php
+++ b/Classes/Utility/ApiHelperUtility.php
@@ -34,6 +34,37 @@ public static function getMappingConfiguration($combinedMappingConfigurationIden
         );
     }
 
+    public static function getOverloadedMappingConfiguration(MappingConfiguration $mappingConfiguration, array $childsSelection): MappingConfiguration
+    {
+        $resultingMappingConfiguration = clone $mappingConfiguration;
+
+        foreach ($childsSelection as $selectedChild) {
+            $childConfiguration = $mappingConfiguration->getChild($selectedChild);
+            if ($childConfiguration !== null) {
+                self::mergeMappingConfiguration($resultingMappingConfiguration, $childConfiguration);
+            }
+        }
+
+        return $resultingMappingConfiguration;
+    }
+
+    public static function mergeMappingConfiguration(MappingConfiguration $mappingConfiguration, MappingConfiguration $mappingConfigurationOverwrite): void
+    {
+        // Overwrite combinedTemplateConfigurationIdentifier if set
+        $newCombinedTemplateIdentifier = $mappingConfigurationOverwrite->getCombinedTemplateConfigurationIdentifier();
+        if ($newCombinedTemplateIdentifier !== '') {
+            $mappingConfiguration->setCombinedTemplateConfigurationIdentifier($newCombinedTemplateIdentifier);
+        }
+
+        // Merge fieldConfiguration
+        $mappingConfiguration->setMappingToTemplate(
+            array_merge_recursive(
+                $mappingConfiguration->getMappingToTemplate(),
+                $mappingConfigurationOverwrite->getMappingToTemplate()
+            )
+        );
+    }
+
     public static function getTemplateConfiguration($combinedTemplateConfigurationIdentifier): TemplateConfiguration
     {
         return self::getConfiguration(