TASK: Migrate existing 7.6 features

We had some features in 7.6 support which we didn't merge up yet.
Mostly very small bug fixes or more helpful logging and processing of
elasticsearch options.

But also adding images of content elements while indexing pages.

Classes/Connection/Elasticsearch/IndexFactory.php

@@ -53,7 +53,10 @@ class IndexFactory implements Singleton
         $index = $connection->getClient()->getIndex('typo3content');
 
         if ($index->exists() === false) {
-            $index->create($this->getConfigurationFor($documentType));
+            $config = $this->getConfigurationFor($documentType);
+            $this->logger->debug(sprintf('Create index %s.', $documentType), [$documentType, $config]);
+            $index->create($config);
+            $this->logger->debug(sprintf('Created index %s.', $documentType), [$documentType]);
         }
 
         return $index;
@@ -64,9 +67,11 @@ class IndexFactory implements Singleton
         try {
             $configuration = $this->configuration->get('indexing.' . $documentType . '.index');
 
-            if (isset($configuration['analysis']['analyzer'])) {
-                foreach ($configuration['analysis']['analyzer'] as $key => $analyzer) {
-                    $configuration['analysis']['analyzer'][$key] = $this->prepareAnalyzerConfiguration($analyzer);
+            foreach (['analyzer', 'filter'] as $optionsToExpand) {
+                if (isset($configuration['analysis'][$optionsToExpand])) {
+                    foreach ($configuration['analysis'][$optionsToExpand] as $key => $options) {
+                        $configuration['analysis'][$optionsToExpand][$key] = $this->prepareOptions($options);
+                    }
                 }
             }
 
@@ -78,7 +83,7 @@ class IndexFactory implements Singleton
 
     protected function prepareAnalyzerConfiguration(array $analyzer) : array
     {
-        $fieldsToExplode = ['char_filter', 'filter'];
+        $fieldsToExplode = ['char_filter', 'filter', 'word_list'];
 
         foreach ($fieldsToExplode as $fieldToExplode) {
             if (isset($analyzer[$fieldToExplode])) {

Classes/Domain/Index/TcaIndexer/PagesIndexer.php

@@ -34,6 +34,12 @@ class PagesIndexer extends TcaIndexer
      */
     protected $contentTableService;
 
+    /**
+     * @var \TYPO3\CMS\Core\Resource\FileRepository
+     * @inject
+     */
+    protected $fileRepository;
+
     /**
      * @param TcaTableService $tcaTableService
      * @param TcaTableService $contentTableService
@@ -60,28 +66,63 @@ class PagesIndexer extends TcaIndexer
             }
         }
 
-        $record['content'] = $this->fetchContentForPage($record['uid']);
+        $record['media'] = $this->fetchMediaForPage($record['uid']);
+        $content = $this->fetchContentForPage($record['uid']);
+        if ($content !== []) {
+            $record['content'] = $content['content'];
+            $record['media'] = array_values(array_unique(array_merge($record['media'], $content['images'])));
+        }
         parent::prepareRecord($record);
     }
 
-    protected function fetchContentForPage(int $uid) : string
+    protected function fetchContentForPage(int $uid) : array
     {
         $contentElements = $this->getQuery($this->contentTableService)->execute()->fetchAll();
 
         if ($contentElements === null) {
             $this->logger->debug('No content for page ' . $uid);
-            return '';
+            return [];
         }
 
         $this->logger->debug('Fetched content for page ' . $uid);
+        $images = [];
         $content = [];
         foreach ($contentElements as $contentElement) {
+            $images = array_merge(
+                $images,
+                $this->getContentElementImages($contentElement['uid'])
+            );
             $content[] = $contentElement['bodytext'];
         }
 
-        // Remove Tags.
-        // Interpret escaped new lines and special chars.
-        // Trim, e.g. trailing or leading new lines.
-        return trim(stripcslashes(strip_tags(implode(' ', $content))));
+        return [
+            // Remove Tags.
+            // Interpret escaped new lines and special chars.
+            // Trim, e.g. trailing or leading new lines.
+            'content' => trim(stripcslashes(strip_tags(implode(' ', $content)))),
+            'images' => $images,
+        ];
+    }
+
+    protected function getContentElementImages(int $uidOfContentElement) : array
+    {
+        return $this->fetchSysFileReferenceUids($uidOfContentElement, 'tt_content', 'image');
+    }
+
+    protected function fetchMediaForPage(int $uid) : array
+    {
+        return $this->fetchSysFileReferenceUids($uid, 'pages', 'media');
+    }
+
+    protected function fetchSysFileReferenceUids(int $uid, string $tablename, string $fieldname) : array
+    {
+        $imageRelationUids = [];
+        $imageRelations = $this->fileRepository->findByRelation($tablename, $fieldname, $uid);
+
+        foreach ($imageRelations as $relation) {
+            $imageRelationUids[] = $relation->getUid();
+        }
+
+        return $imageRelationUids;
     }
 }

Classes/Domain/Search/QueryFactory.php

@@ -136,13 +136,15 @@ class QueryFactory
             ];
         }
 
-        $query = ArrayUtility::arrayMergeRecursiveOverrule($query, [
-            'query' => [
-                'bool' => [
-                    'should' => $boostQueryParts,
+        if (!empty($boostQueryParts)) {
+            $query = ArrayUtility::arrayMergeRecursiveOverrule($query, [
+                'query' => [
+                    'bool' => [
+                        'should' => $boostQueryParts,
+                    ],
                 ],
-            ],
-        ]);
+            ]);
+        }
     }
 
     protected function addFactorBoost(array &$query)