#1760 Correcct price in filetr with non-base currency (#82)

src/Model/Layer/Filter/Price.php

@@ -0,0 +1,127 @@
+<?php
+/**
+ * ScandiPWA - Progressive Web App for Magento
+ *
+ * Copyright © Scandiweb, Inc. All rights reserved.
+ * See LICENSE for license details.
+ *
+ * @license OSL-3.0 (Open Software License ("OSL") v. 3.0)
+ * @package scandipwa/module-customer-graph-ql
+ * @link https://github.com/scandipwa/module-customer-graph-ql
+ */
+declare(strict_types=1);
+
+namespace ScandiPWA\CatalogGraphQl\Model\Layer\Filter;
+
+use Magento\Store\Model\StoreManagerInterface;
+use Magento\CatalogGraphQl\DataProvider\Product\LayeredNavigation\LayerBuilderInterface;
+use Magento\Framework\Api\Search\AggregationInterface;
+use Magento\Framework\Api\Search\BucketInterface;
+use Magento\CatalogGraphQl\DataProvider\Product\LayeredNavigation\Formatter\LayerFormatter;
+
+/**
+ * @inheritdoc
+ */
+class Price implements LayerBuilderInterface
+{
+    /**
+     * @var StoreManagerInterface
+     */
+    private $storeManager;
+
+    /**
+     * @var string
+     */
+    private const PRICE_BUCKET = 'price_bucket';
+
+    /**
+     * @var LayerFormatter
+     */
+    private $layerFormatter;
+
+    /**
+     * @var array
+     */
+    private static $bucketMap = [
+        self::PRICE_BUCKET => [
+            'request_name' => 'price',
+            'label' => 'Price'
+        ],
+    ];
+
+    /**
+     * @param LayerFormatter $layerFormatter
+     */
+    public function __construct(
+        LayerFormatter $layerFormatter,
+        StoreManagerInterface $storeManager
+    )
+    {
+        $this->layerFormatter = $layerFormatter;
+        $this->storeManager = $storeManager;
+    }
+
+    /**
+     * @inheritdoc
+     * @SuppressWarnings(PHPMD.UnusedFormalParameter)
+     */
+    public function build(AggregationInterface $aggregation, ?int $storeId): array
+    {
+        $bucket = $aggregation->getBucket(self::PRICE_BUCKET);
+        if ($this->isBucketEmpty($bucket)) {
+            return [];
+        }
+
+        $result = $this->layerFormatter->buildLayer(
+            self::$bucketMap[self::PRICE_BUCKET]['label'],
+            \count($bucket->getValues()),
+            self::$bucketMap[self::PRICE_BUCKET]['request_name']
+        );
+
+        // Gets cuurrent currency rate
+        $currencyRate = $this->storeManager->getStore()->getCurrentCurrencyRate();
+
+        // Loops through-out each price range option
+        foreach ($bucket->getValues() as $value) {
+            $metrics = $value->getMetrics();
+
+            // Updates to correct currency
+            $priceRange = [
+                'from' => $this->getMetricValue($metrics['from'], $currencyRate),
+                'to' => $this->getMetricValue($metrics['to'], $currencyRate)
+            ];
+
+            // Builds graph-ql response
+            $result['options'][] = $this->layerFormatter->buildItem(
+                $priceRange['from'] . '~' . $priceRange['to'],
+                $metrics['value'],
+                $metrics['count']
+            );
+        }
+
+        return [$result];
+    }
+
+    /**
+     * Converts price to correct currency base,
+     * if notehing is set, then changes it to wildcard.
+     *
+     * @param $base
+     * @param $rate
+     * @return float|int|string
+     */
+    private function getMetricValue($base, $rate) {
+        return (!is_null($base) && is_numeric($base)) ? $base * $rate : '*';
+    }
+
+    /**
+     * Check that bucket contains data
+     *
+     * @param BucketInterface|null $bucket
+     * @return bool
+     */
+    private function isBucketEmpty(?BucketInterface $bucket): bool
+    {
+        return null === $bucket || !$bucket->getValues();
+    }
+}

src/etc/di.xml

@@ -76,4 +76,7 @@
     <type name="Magento\Eav\Model\Entity\Collection\AbstractCollection">
         <plugin name="find_duplicate_entry" type="ScandiPWA\CatalogGraphQl\Plugin\Collection" sortOrder="20"/>
     </type>
+
+    <preference for="Magento\CatalogGraphQl\DataProvider\Product\LayeredNavigation\Builder\Price"
+                type="ScandiPWA\CatalogGraphQl\Model\Layer\Filter\Price" />
 </config>