TASK: Integrate working code

Copied code from customer installation with working implementation.

Classes/Configuration/ConfigurationContainerInterface.php

@@ -34,6 +34,8 @@ interface ConfigurationContainerInterface extends Singleton
      *
      * @param string $path In dot notation. E.g. indexer.tca.allowedTables
      * @return mixed
+     *
+     * @throws InvalidArgumentException
      */
     public function get($path);
 

Classes/Connection/Elasticsearch.php

@@ -20,8 +20,10 @@ namespace Leonmrni\SearchCore\Connection;
  * 02110-1301, USA.
  */
 
-use TYPO3\CMS\Core\SingletonInterface as Singleton;
+use Leonmrni\SearchCore\Connection\Elasticsearch\SearchResult;
 use Leonmrni\SearchCore\Domain\Search\QueryFactory;
+use TYPO3\CMS\Core\SingletonInterface as Singleton;
+use TYPO3\CMS\Extbase\Object\ObjectManagerInterface;
 
 /**
  * Outer wrapper to elasticsearch.
@@ -43,6 +45,11 @@ class Elasticsearch implements Singleton, ConnectionInterface
      */
     protected $typeFactory;
 
+    /**
+     * @var Elasticsearch\MappingFactory
+     */
+    protected $mappingFactory;
+
     /**
      * @var Elasticsearch\DocumentFactory
      */
@@ -58,6 +65,11 @@ class Elasticsearch implements Singleton, ConnectionInterface
      */
     protected $logger;
 
+    /**
+     * @var ObjectManagerInterface
+     */
+    protected $objectManager;
+
     /**
      * Inject log manager to get concrete logger from it.
      *
@@ -68,10 +80,19 @@ class Elasticsearch implements Singleton, ConnectionInterface
         $this->logger = $logManager->getLogger(__CLASS__);
     }
 
+    /**
+     * @param ObjectManagerInterface $objectManager
+     */
+    public function injectObjectManager(ObjectManagerInterface $objectManager)
+    {
+        $this->objectManager = $objectManager;
+    }
+
     /**
      * @param Elasticsearch\Connection $connection
      * @param Elasticsearch\IndexFactory $indexFactory
      * @param Elasticsearch\TypeFactory $typeFactory
+     * @param Elasticsearch\MappingFactory $mappingFactory
      * @param Elasticsearch\DocumentFactory $documentFactory
      * @param QueryFactory $queryFactory
      */
@@ -79,12 +100,14 @@ class Elasticsearch implements Singleton, ConnectionInterface
         Elasticsearch\Connection $connection,
         Elasticsearch\IndexFactory $indexFactory,
         Elasticsearch\TypeFactory $typeFactory,
+        Elasticsearch\MappingFactory $mappingFactory,
         Elasticsearch\DocumentFactory $documentFactory,
         QueryFactory $queryFactory
     ) {
         $this->connection = $connection;
         $this->indexFactory = $indexFactory;
         $this->typeFactory = $typeFactory;
+        $this->mappingFactory = $mappingFactory;
         $this->documentFactory = $documentFactory;
         $this->queryFactory = $queryFactory;
     }
@@ -142,6 +165,13 @@ class Elasticsearch implements Singleton, ConnectionInterface
     protected function withType($documentType, callable $callback)
     {
         $type = $this->getType($documentType);
+        // TODO: Check whether it's to heavy to send it so often e.g. for every single document.
+        // Perhaps add command controller to submit mapping?!
+        // Also it's not possible to change mapping without deleting index first.
+        // Mattes told about a solution.
+        // So command looks like the best way so far, except we manage mattes solution.
+        // Still then this should be done once. So perhaps singleton which tracks state and does only once?
+        $this->mappingFactory->getMapping($type)->send();
         $callback($type);
         $type->getIndex()->refresh();
     }
@@ -149,7 +179,7 @@ class Elasticsearch implements Singleton, ConnectionInterface
     /**
      * @param SearchRequestInterface $searchRequest
      *
-     * @return \Elastica\ResultSet
+     * @return SearchResultInterface
      */
     public function search(SearchRequestInterface $searchRequest)
     {
@@ -157,11 +187,9 @@ class Elasticsearch implements Singleton, ConnectionInterface
 
         $search = new \Elastica\Search($this->connection->getClient());
         $search->addIndex('typo3content');
-        $search->setQuery($this->queryFactory->create($this, $searchRequest));
+        $search->setQuery($this->queryFactory->create($searchRequest));
 
-        // TODO: Return wrapped result to implement our interface.
-        // Also update php doc to reflect the change.
-        return $search->search();
+        return $this->objectManager->get(SearchResult::class, $search->search());
     }
 
     /**

Classes/Connection/Elasticsearch/Facet.php

@@ -0,0 +1,93 @@
+<?php
+namespace Leonmrni\SearchCore\Connection\Elasticsearch;
+
+/*
+ * Copyright (C) 2017  Daniel Siepmann <coding@daniel-siepmann.de>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+use Leonmrni\SearchCore\Configuration\ConfigurationContainerInterface;
+use Leonmrni\SearchCore\Connection\FacetInterface;
+
+class Facet implements FacetInterface
+{
+    /**
+     * @var string
+     */
+    protected $name = '';
+
+    /**
+     * @var string
+     */
+    protected $field = '';
+
+    /**
+     * @var array
+     */
+    protected $buckets = [];
+
+    /**
+     * @var array<FacetOption>
+     */
+    protected $options = [];
+
+    public function __construct($name, array $aggregation, ConfigurationContainerInterface $configuration)
+    {
+        $this->name = $name;
+        $this->buckets = $aggregation['buckets'];
+        $this->field = $configuration->getIfExists('searching.facets.' . $this->name . '.field') ?: '';
+    }
+
+    /**
+     * @return string
+     */
+    public function getName()
+    {
+        return $this->name;
+    }
+
+    /**
+     * @return string
+     */
+    public function getField()
+    {
+        return $this->field;
+    }
+
+    /**
+     * Returns all possible options for this facet.
+     *
+     * @return array<FacetOptionInterface>
+     */
+    public function getOptions()
+    {
+        $this->initOptions();
+
+        return $this->options;
+    }
+
+    protected function initOptions()
+    {
+        if ($this->options !== []) {
+            return;
+        }
+
+        foreach ($this->buckets as $bucket) {
+            $this->options[] = new FacetOption($bucket);
+        }
+    }
+}

Classes/Connection/Elasticsearch/FacetOption.php

@@ -0,0 +1,61 @@
+<?php
+namespace Leonmrni\SearchCore\Connection\Elasticsearch;
+
+/*
+ * Copyright (C) 2017  Daniel Siepmann <coding@daniel-siepmann.de>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+use Leonmrni\SearchCore\Connection\FacetOptionInterface;
+
+class FacetOption implements FacetOptionInterface
+{
+    /**
+     * @var string
+     */
+    protected $name = '';
+
+    /**
+     * @var int
+     */
+    protected $count = 0;
+
+    /**
+     * @param array $bucket
+     */
+    public function __construct(array $bucket)
+    {
+        $this->name = $bucket['key'];
+        $this->count = $bucket['doc_count'];
+    }
+
+    /**
+     * @return string
+     */
+    public function getName()
+    {
+        return $this->name;
+    }
+
+    /**
+     * @return int
+     */
+    public function getCount()
+    {
+        return $this->count;
+    }
+}

Classes/Connection/Elasticsearch/MappingFactory.php

@@ -0,0 +1,73 @@
+<?php
+namespace Leonmrni\SearchCore\Connection\Elasticsearch;
+
+/*
+ * Copyright (C) 2016  Daniel Siepmann <coding@daniel-siepmann.de>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+use Leonmrni\SearchCore\Configuration\ConfigurationContainerInterface;
+use Leonmrni\SearchCore\Configuration\InvalidArgumentException;
+use TYPO3\CMS\Core\SingletonInterface as Singleton;
+
+/**
+ * Factory to get mappings.
+ */
+class MappingFactory implements Singleton
+{
+    /**
+     * @var ConfigurationContainerInterface
+     */
+    protected $configuration;
+
+    /**
+     * @param ConfigurationContainerInterface $configuration
+     */
+    public function __construct(ConfigurationContainerInterface $configuration)
+    {
+        $this->configuration = $configuration;
+    }
+
+    /**
+     * Get an mapping based on type.
+     *
+     * @param \Elastica\Type $type
+     *
+     * @return \Elastica\Mapping
+     */
+    public function getMapping(\Elastica\Type $type)
+    {
+        $mapping = new \Elastica\Type\Mapping();
+        $mapping->setType($type);
+        $mapping->setProperties($this->getConfiguration($type->getName()));
+
+        return $mapping;
+    }
+
+    /**
+     * @param string $identifier
+     * @return array
+     */
+    protected function getConfiguration($identifier)
+    {
+        try {
+            return $this->configuration->get('indexing.' . $identifier . '.mapping');
+        } catch (InvalidArgumentException $e) {
+            return [];
+        }
+    }
+}

Classes/Connection/Elasticsearch/ResultItem.php

@@ -0,0 +1,56 @@
+<?php
+namespace Leonmrni\SearchCore\Connection\Elasticsearch;
+
+/*
+ * Copyright (C) 2017  Daniel Siepmann <coding@daniel-siepmann.de>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+use Leonmrni\SearchCore\Connection\ResultItemInterface;
+
+class ResultItem implements ResultItemInterface
+{
+    /**
+     * @var array
+     */
+    protected $data = [];
+
+    public function __construct(\Elastica\Result $result)
+    {
+        $this->data = $result->getData();
+    }
+
+    public function offsetExists($offset)
+    {
+        return isset($this->data[$offset]);
+    }
+
+    public function offsetGet($offset)
+    {
+        return $this->data[$offset];
+    }
+
+    public function offsetSet()
+    {
+        throw new \BadMethodCallException('It\'s not possible to change the search result.', 1499179077);
+    }
+
+    public function offsetUnset()
+    {
+        throw new \BadMethodCallException('It\'s not possible to change the search result.', 1499179077);
+    }
+}

Classes/Connection/Elasticsearch/SearchResult.php

@@ -20,12 +20,127 @@ namespace Leonmrni\SearchCore\Connection\Elasticsearch;
  * 02110-1301, USA.
  */
 
+use Leonmrni\SearchCore\Connection\FacetInterface;
+use Leonmrni\SearchCore\Connection\ResultItemInterface;
 use Leonmrni\SearchCore\Connection\SearchResultInterface;
+use TYPO3\CMS\Extbase\Object\ObjectManagerInterface;
+
+class SearchResult implements SearchResultInterface
+{
+    /**
+     * @var \Elastica\ResultSet
+     */
+    protected $result;
 
     /**
- *
+     * @var array<FacetInterface>
      */
-class SearchResult extends \Elastica\SearchResult implements SearchResultInterface
-{
+    protected $facets = [];
 
+    /**
+     * @var array<ResultItemInterface>
+     */
+    protected $results = [];
+
+    /**
+     * @var ObjectManagerInterface
+     */
+    protected $objectManager;
+
+    public function __construct(\Elastica\ResultSet $result, ObjectManagerInterface $objectManager)
+    {
+        $this->result = $result;
+        $this->objectManager = $objectManager;
+    }
+
+    /**
+     * @return array<ResultItemInterface>
+     */
+    public function getResults()
+    {
+        $this->initResults();
+
+        return $this->results;
+    }
+
+    /**
+     * Return all facets, if any.
+     *
+     * @return array<FacetIterface>
+     */
+    public function getFacets()
+    {
+        $this->initFacets();
+
+        return $this->facets;
+    }
+
+    /**
+     * Returns the total sum of matching results.
+     *
+     * @return int
+     */
+    public function getTotalCount()
+    {
+        return $this->result->getTotalHits();
+    }
+
+    // Countable - Interface
+    /**
+     * Returns the total sum of results contained in this result.
+     *
+     * @return int
+     */
+    public function count()
+    {
+        return $this->result->count();
+    }
+
+    // Iterator - Interface
+    public function current()
+    {
+        return $this->result->current();
+    }
+
+    public function next()
+    {
+        return $this->result->next();
+    }
+
+    public function key()
+    {
+        return $this->result->key();
+    }
+
+    public function valid()
+    {
+        return $this->result->valid();
+    }
+
+    public function rewind()
+    {
+        $this->result->rewind();
+    }
+
+    protected function initResults()
+    {
+        if ($this->results !== []) {
+            return;
+        }
+
+        foreach ($this->result->getResults() as $result) {
+            $this->results[] = new ResultItem($result);
+        }
+    }
+
+    protected function initFacets()
+    {
+        if ($this->facets !== [] || !$this->result->hasAggregations()) {
+            return;
+        }
+
+        foreach ($this->result->getAggregations() as $aggregationName => $aggregation) {
+            $this->facets[] = $this->objectManager->get(Facet::class, $aggregationName, $aggregation);
+        }
+    }
 }

Classes/Connection/FacetInterface.php

@@ -0,0 +1,39 @@
+<?php
+namespace Leonmrni\SearchCore\Connection;
+
+/*
+ * Copyright (C) 2016  Daniel Siepmann <coding@daniel-siepmann.de>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+/**
+ * A single facet, e.g. keyword based.
+ */
+interface FacetInterface
+{
+    /**
+     * @return string
+     */
+    public function getName();
+
+    /**
+     * Returns all possible options for this facet.
+     *
+     * @return array<FacetOptionInterface>
+     */
+    public function getOptions();
+}

Classes/Connection/FacetOptionInterface.php

@@ -0,0 +1,42 @@
+<?php
+namespace Leonmrni\SearchCore\Connection;
+
+/*
+ * Copyright (C) 2016  Daniel Siepmann <coding@daniel-siepmann.de>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+/**
+ * A single possible option of a facet.
+ */
+interface FacetOptionInterface
+{
+    /**
+     * Returns the name of this option. Equivalent
+     * to value used for filtering.
+     *
+     * @return string
+     */
+    public function getName();
+
+    /**
+     * Returns the number of found results for this option.
+     *
+     * @return int
+     */
+    public function getCount();
+}

Classes/Connection/FacetRequestInterface.php

@@ -0,0 +1,42 @@
+<?php
+namespace Leonmrni\SearchCore\Connection;
+
+/*
+ * Copyright (C) 2017  Daniel Siepmann <coding@daniel-siepmann.de>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+/**
+ * Used to request facets / aggregates from connection.
+ */
+interface FacetRequestInterface
+{
+    /**
+     * The identifier of the facet, used as key in arrays and to get the facet
+     * from search request, etc.
+     *
+     * @return string
+     */
+    public function getIdentifier();
+
+    /**
+     * The field to use for facet building.
+     *
+     * @return string
+     */
+    public function getField();
+}

Classes/Connection/ResultItemInterface.php

@@ -0,0 +1,29 @@
+<?php
+namespace Leonmrni\SearchCore\Connection;
+
+/*
+ * Copyright (C) 2017  Daniel Siepmann <coding@daniel-siepmann.de>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+/**
+ * Use ArrayAccess to enable retrieval of information in fluid.
+ */
+interface ResultItemInterface extends \ArrayAccess
+{
+
+}

Classes/Connection/SearchResultInterface.php

@@ -21,9 +21,19 @@ namespace Leonmrni\SearchCore\Connection;
  */
 
 /**
- *
+ * A search result.
  */
-interface SearchResultInterface extends \Iterator, \Countable, \ArrayAccess
+interface SearchResultInterface extends \Iterator, \Countable
 {
+    /**
+     * @return array<ResultItemInterface>
+     */
+    public function getResults();
 
+    /**
+     * Return all facets, if any.
+     *
+     * @return array<FacetIterface>
+     */
+    public function getFacets();
 }

Classes/Domain/Index/IndexerFactory.php

@@ -45,6 +45,7 @@ class IndexerFactory implements Singleton
 
     /**
      * @param ObjectManagerInterface $objectManager
+     * @param ConfigurationContainerInterface $configuration
      */
     public function __construct(
         ObjectManagerInterface $objectManager,

Classes/Domain/Index/TcaIndexer.php

@@ -20,7 +20,6 @@ namespace Leonmrni\SearchCore\Domain\Index;
  * 02110-1301, USA.
  */
 
-use TYPO3\CMS\Extbase\Object\ObjectManagerInterface;
 use Leonmrni\SearchCore\Connection\ConnectionInterface;
 
 /**

Classes/Domain/Model/FacetRequest.php

@@ -0,0 +1,62 @@
+<?php
+namespace Leonmrni\SearchCore\Domain\Model;
+
+/*
+ * Copyright (C) 2017  Daniel Siepmann <coding@daniel-siepmann.de>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+use Leonmrni\SearchCore\Connection\FacetRequestInterface;
+
+class FacetRequest implements FacetRequestInterface
+{
+    /**
+     * @var string
+     */
+    protected $identifier = '';
+
+    /**
+     * @var string
+     */
+    protected $field = '';
+
+    /**
+     * @param string $identifier
+     * @param string $field
+     */
+    public function __construct($identifier, $field)
+    {
+        $this->identifier = $identifier;
+        $this->field = $field;
+    }
+
+    /**
+     * @return string
+     */
+    public function getIdentifier()
+    {
+        return $this->identifier;
+    }
+
+    /**
+     * @return string
+     */
+    public function getField()
+    {
+        return $this->field;
+    }
+}

Classes/Domain/Model/SearchRequest.php

@@ -20,6 +20,7 @@ namespace Leonmrni\SearchCore\Domain\Model;
  * 02110-1301, USA.
  */
 
+use Leonmrni\SearchCore\Connection\FacetRequestInterface;
 use Leonmrni\SearchCore\Connection\SearchRequestInterface;
 
 /**
@@ -39,6 +40,11 @@ class SearchRequest implements SearchRequestInterface
      */
     protected $filter = [];
 
+    /**
+     * @var array
+     */
+    protected $facets = [];
+
     /**
      * @param string $query
      */
@@ -68,7 +74,7 @@ class SearchRequest implements SearchRequestInterface
      */
     public function setFilter(array $filter)
     {
-        $this->filter = array_map('strval', $filter);
+        $this->filter = array_filter(array_map('strval', $filter));
     }
 
     /**
@@ -86,4 +92,24 @@ class SearchRequest implements SearchRequestInterface
     {
         return $this->filter;
     }
+
+    /**
+     * Add a facet to gather in this search request.
+     *
+     * @param FacetRequestInterface $facet
+     */
+    public function addFacet(FacetRequestInterface $facet)
+    {
+        $this->facets[$facet->getIdentifier()] = $facet;
+    }
+
+    /**
+     * Returns all configured facets to fetch in this search request.
+     *
+     * @return array
+     */
+    public function getFacets()
+    {
+        return $this->facets;
+    }
 }

Classes/Domain/Search/QueryFactory.php

@@ -23,29 +23,62 @@ namespace Leonmrni\SearchCore\Domain\Search;
 use Leonmrni\SearchCore\Connection\ConnectionInterface;
 use Leonmrni\SearchCore\Connection\Elasticsearch\Query;
 use Leonmrni\SearchCore\Connection\SearchRequestInterface;
+use TYPO3\CMS\Extbase\Utility\ArrayUtility;
 
 class QueryFactory
 {
     /**
-     * @param ConnectionInterface $connection
+     * @var \TYPO3\CMS\Core\Log\Logger
+     */
+    protected $logger;
+
+    /**
+     * @var array
+     */
+    protected $query = [];
+
+    /**
+     * @param \TYPO3\CMS\Core\Log\LogManager $logManager
+     */
+    public function __construct(\TYPO3\CMS\Core\Log\LogManager $logManager)
+    {
+        $this->logger = $logManager->getLogger(__CLASS__);
+    }
+
+    /**
      * @param SearchRequestInterface $searchRequest
      *
      * @return \Elastica\Query
      */
-    public function create(
-        ConnectionInterface $connection,
-        SearchRequestInterface $searchRequest
-    ) {
+    public function create(SearchRequestInterface $searchRequest)
+    {
         return $this->createElasticaQuery($searchRequest);
     }
 
     /**
      * @param SearchRequestInterface $searchRequest
+     *
+     * TODO: This is not in scope Elasticsearch, therefore should not return elastica.
      * @return \Elastica\Query
      */
     protected function createElasticaQuery(SearchRequestInterface $searchRequest)
     {
-        $query = [
+        $this->addSearch($searchRequest);
+        $this->addFilter($searchRequest);
+        $this->addFacets($searchRequest);
+
+        // TODO: Add logging here.
+        $this->logger->debug('Generated elasticsearch query.', [$this->query]);
+        return new \Elastica\Query($this->query);
+    }
+
+    /**
+     * @param SearchRequestInterface $searchRequest
+     */
+    protected function addSearch(SearchRequestInterface $searchRequest)
+    {
+        $this->query = ArrayUtility::arrayMergeRecursiveOverrule($this->query, [
+            'query' => [
                 'bool' => [
                     'must' => [
                         [
@@ -55,12 +88,52 @@ class QueryFactory
                         ],
                     ],
                 ],
+            ],
+        ]);
+    }
+
+    /**
+     * @param SearchRequestInterface $searchRequest
+     */
+    protected function addFilter(SearchRequestInterface $searchRequest)
+    {
+        if (! $searchRequest->hasFilter()) {
+            return;
+        }
+
+        $terms = [];
+        foreach ($searchRequest->getFilter() as $name => $value) {
+            $terms[] = [
+                'term' => [
+                    $name => $value,
+                ],
             ];
-
-        if ($searchRequest->hasFilter()) {
-            $query['bool']['filter'] = ['term' => $searchRequest->getFilter()];
         }
 
-        return new \Elastica\Query(['query' => $query]);
+        $this->query = ArrayUtility::arrayMergeRecursiveOverrule($this->query, [
+            'query' => [
+                'bool' => [
+                    'filter' => $terms,
+                ],
+            ],
+        ]);
+    }
+
+    /**
+     * @param SearchRequestInterface $searchRequest
+     */
+    protected function addFacets(SearchRequestInterface $searchRequest)
+    {
+        foreach ($searchRequest->getFacets() as $facet) {
+            $this->query = ArrayUtility::arrayMergeRecursiveOverrule($this->query, [
+                'aggs' => [
+                    $facet->getIdentifier() => [
+                        'terms' => [
+                            'field' => $facet->getField(),
+                        ],
+                    ],
+                ],
+            ]);
+        }
     }
 }

Classes/Domain/Search/SearchService.php

@@ -20,10 +20,13 @@ namespace Leonmrni\SearchCore\Domain\Search;
  * 02110-1301, USA.
  */
 
+use Leonmrni\SearchCore\Configuration\ConfigurationContainerInterface;
+use Leonmrni\SearchCore\Configuration\InvalidArgumentException;
 use Leonmrni\SearchCore\Connection\ConnectionInterface;
 use Leonmrni\SearchCore\Connection\SearchRequestInterface;
 use Leonmrni\SearchCore\Connection\SearchResultInterface;
-use Leonmrni\SearchCore\Domain\Model\SearchRequest;
+use Leonmrni\SearchCore\Domain\Model\FacetRequest;
+use TYPO3\CMS\Extbase\Object\ObjectManagerInterface;
 
 /**
  * Service to process a search request.
@@ -36,11 +39,28 @@ class SearchService
     protected $connection;
 
     /**
-     * @param ConnectionInterface $connection
+     * @var ConfigurationContainerInterface
      */
-    public function __construct(ConnectionInterface $connection)
-    {
+    protected $configuration;
+
+    /**
+     * @var ObjectManagerInterface
+     */
+    protected $objectManager;
+
+    /**
+     * @param ConnectionInterface $connection
+     * @param ConfigurationContainerInterface $configuration
+     * @param ObjectManagerInterface $objectManager
+     */
+    public function __construct(
+        ConnectionInterface $connection,
+        ConfigurationContainerInterface $configuration,
+        ObjectManagerInterface $objectManager
+    ) {
         $this->connection = $connection;
+        $this->configuration = $configuration;
+        $this->objectManager = $objectManager;
     }
 
     /**
@@ -49,6 +69,34 @@ class SearchService
      */
     public function search(SearchRequestInterface $searchRequest)
     {
+        $this->addConfiguredFacets($searchRequest);
+
         return $this->connection->search($searchRequest);
     }
+
+    /**
+     * Add facets from configuration to request.
+     *
+     * @param SearchRequestInterface $searchRequest
+     */
+    protected function addConfiguredFacets(SearchRequestInterface $searchRequest)
+    {
+        $facetsConfig = $this->configuration->getIfExists('searching.facets');
+        if ($facetsConfig === null) {
+            return;
+        }
+
+        foreach ($facetsConfig as $identifier => $facetConfig) {
+            if (!isset($facetConfig['field']) || trim($facetConfig['field']) === '') {
+                // TODO: Finish throw
+                throw new \Exception('message', 1499171142);
+            }
+
+            $searchRequest->addFacet($this->objectManager->get(
+                FacetRequest::class,
+                $identifier,
+                $facetConfig['field']
+            ));
+        }
+    }
 }