first commit

Classes/Domain/Search/ResultSet/Facets/DefaultFacetQueryBuilder.php

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+<?php
+namespace WapplerSystems\Meilisearch\Domain\Search\ResultSet\Facets;
+
+/*
+ * This file is part of the TYPO3 CMS project.
+ *
+ * It is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License, either version 2
+ * of the License, or any later version.
+ *
+ * For the full copyright and license information, please read the
+ * LICENSE.txt file that was distributed with this source code.
+ *
+ * The TYPO3 project - inspiring people to share!
+*/
+
+use WapplerSystems\Meilisearch\System\Configuration\TypoScriptConfiguration;
+
+class DefaultFacetQueryBuilder implements FacetQueryBuilderInterface {
+
+    /**
+     * @param string $facetName
+     * @param TypoScriptConfiguration $configuration
+     * @return array
+     */
+    public function build($facetName, TypoScriptConfiguration $configuration)
+    {
+        $facetParameters = [];
+        $facetConfiguration = $configuration->getSearchFacetingFacetByName($facetName);
+
+        $tags = $this->buildExcludeTags($facetConfiguration, $configuration);
+        $facetParameters['facet.field'][] = $tags . $facetConfiguration['field'];
+
+        $sortingExpression = new SortingExpression();
+        $facetSortExpression = $sortingExpression->getForFacet($facetConfiguration['sortBy']);
+        if (!empty($facetSortExpression)) {
+            $facetParameters['f.' . $facetConfiguration['field'] . '.facet.sort'] = $facetSortExpression;
+        }
+
+        return $facetParameters;
+    }
+
+    /**
+     * @param array $facetConfiguration
+     * @param TypoScriptConfiguration $configuration
+     * @return string
+     */
+    protected function buildExcludeTags(array $facetConfiguration, TypoScriptConfiguration $configuration)
+    {
+        // simple for now, may add overrides f.<field_name>.facet.* later
+        if ($configuration->getSearchFacetingKeepAllFacetsOnSelection()) {
+            $facets = [];
+            foreach ($configuration->getSearchFacetingFacets() as $facet) {
+                $facets[] = $facet['field'];
+            }
+
+            return '{!ex=' . implode(',', $facets) . '}';
+        } elseif ($facetConfiguration['keepAllOptionsOnSelection'] == 1) {
+            return '{!ex=' . $facetConfiguration['field'] . '}';
+        }
+
+        return '';
+    }
+}
+