#26121: special price & tier price are coming in base currency

Adjust to take customer group (via setting customerGroupId) into consideration.

Author: pmarjan

app/code/Magento/Catalog/Model/Product/Type/Price.php

@@ -368,10 +368,33 @@ protected function getAllCustomerGroupsId()
      * @return \Magento\Catalog\Api\Data\ProductTierPriceInterface[]
      */
     public function getTierPrices($product)
+    {
+        $tierPricesRaw = $this->getExistingPrices($product, 'tier_price');
+
+        return $this->buildProductTierPriceInterfaceObjects($tierPricesRaw);
+    }
+
+    /**
+     * Return ProductTierPriceInterface[] given raw tier prices array
+     *
+     * @param array $tierPricesRaw
+     * @return \Magento\Catalog\Api\Data\ProductTierPriceInterface[]
+     */
+    public function transformTierPrices($tierPricesRaw)
+    {
+        return $this->buildProductTierPriceInterfaceObjects($tierPricesRaw);
+    }
+
+    /**
+     * Return ProductTierPriceInterface[] given raw tier prices array
+     *
+     * @param array $tierPricesRaw
+     * @return \Magento\Catalog\Api\Data\ProductTierPriceInterface[]
+     */
+    private function buildProductTierPriceInterfaceObjects($tierPricesRaw)
     {
         $prices = [];
-        $tierPrices = $this->getExistingPrices($product, 'tier_price');
-        foreach ($tierPrices as $price) {
+        foreach ($tierPricesRaw as $price) {
             /** @var \Magento\Catalog\Api\Data\ProductTierPriceInterface $tierPrice */
             $tierPrice = $this->tierPriceFactory->create()
                 ->setExtensionAttributes($this->tierPriceExtensionFactory->create());

app/code/Magento/CatalogCustomerGraphQl/Model/Resolver/PriceTiers.php

@@ -130,21 +130,18 @@ private function formatProductTierPrices(array $tierPrices, float $productPrice,
         $tiers = [];
 
         foreach ($tierPrices as $tierPrice) {
-            $websitePrice = $tierPrice['website_price'];
-            $percentValue = $tierPrice['percentage_value'];
-            $quantity = $tierPrice['price_qty'];
-
+            $percentValue = $tierPrice->getExtensionAttributes()->getPercentageValue();
             if ($percentValue && is_numeric($percentValue)) {
                 $discount = $this->discount->getDiscountByPercent($productPrice, (float)$percentValue);
             } else {
-                $discount = $this->discount->getDiscountByDifference($productPrice, (float)$websitePrice);
+                $discount = $this->discount->getDiscountByDifference($productPrice, (float)$tierPrice->getValue());
             }
 
             $tiers[] = [
                 "discount" => $discount,
-                "quantity" => $quantity,
+                "quantity" => $tierPrice->getQty(),
                 "final_price" => [
-                    "value" => $websitePrice,
+                    "value" => $tierPrice->getValue(),
                     "currency" => $store->getCurrentCurrencyCode()
                 ]
             ];

app/code/Magento/CatalogCustomerGraphQl/Model/Resolver/Product/Price/Tiers.php

@@ -10,10 +10,12 @@
 use Magento\Catalog\Model\ResourceModel\Product\CollectionFactory;
 use Magento\Catalog\Model\ResourceModel\Product\Collection;
 use Magento\Catalog\Model\ResourceModel\Product as ProductResource;
-use Magento\Catalog\Pricing\Price\TierPrice;
+use Magento\CatalogCustomerGraphQl\Pricing\Price\TierPrice;
 use Magento\Customer\Model\GroupManagement;
 use Magento\Catalog\Api\Data\ProductTierPriceInterface;
 use Magento\CatalogGraphQl\Model\Resolver\Product\Price\ProviderPool as PriceProviderPool;
+use Magento\Framework\App\ObjectManager;
+use Magento\Catalog\Model\Product\Type\Price;
 
 /**
  * Get product tier price information
@@ -55,22 +57,30 @@ class Tiers
      */
     private $products = [];
 
+    /**
+     * @var Price
+     */
+    private $price;
+
     /**
      * @param CollectionFactory $collectionFactory
      * @param ProductResource $productResource
      * @param PriceProviderPool $priceProviderPool
      * @param int $customerGroupId
+     * @param Price $price
      */
     public function __construct(
         CollectionFactory $collectionFactory,
         ProductResource $productResource,
         PriceProviderPool $priceProviderPool,
-        $customerGroupId
+        $customerGroupId,
+        Price $price
     ) {
         $this->collectionFactory = $collectionFactory;
         $this->productResource = $productResource;
         $this->priceProviderPool = $priceProviderPool;
         $this->customerGroupId = $customerGroupId;
+        $this->price = $price;
     }
 
     /**
@@ -100,9 +110,21 @@ public function getProductTierPrices($productId): ?array
         }
 
         /** @var TierPrice $tierPrice */
-        $tierPrice = $this->products[$productId]->getPriceInfo()->getPrice(TierPrice::PRICE_CODE);
+        $tierPrice = ObjectManager::getInstance()->create(TierPrice::class,
+            [
+                'saleableItem' => $this->products[$productId],
+                'quantity' => 1,
+                'customerGroupId' => $this->customerGroupId
+            ]
+        );
+
+        /** @var array $tierPricesRaw */
+        $tierPricesRaw = $tierPrice->getTierPriceList();
+
+        /** @var ProductTierPriceInterface[] $tierPrices */
+        $tierPrices = $this->price->transformTierPrices($tierPricesRaw);
 
-        return $tierPrice->getTierPriceList();
+        return $tierPrices;
     }
 
     /**

app/code/Magento/CatalogCustomerGraphQl/Pricing/Price/TierPrice.php

@@ -0,0 +1,49 @@
+<?php
+
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+namespace Magento\CatalogCustomerGraphQl\Pricing\Price;
+
+use Magento\Catalog\Model\Product;
+use Magento\Customer\Api\GroupManagementInterface;
+use Magento\Customer\Model\Session;
+use Magento\Framework\Pricing\Adjustment\CalculatorInterface;
+use Magento\Framework\Pricing\PriceCurrencyInterface;
+
+class TierPrice extends \Magento\Catalog\Pricing\Price\TierPrice
+{
+    /**
+     * TierPrice constructor.
+     * @param Product $saleableItem
+     * @param float $quantity
+     * @param CalculatorInterface $calculator
+     * @param PriceCurrencyInterface $priceCurrency
+     * @param Session $customerSession
+     * @param GroupManagementInterface $groupManagement
+     * @param int $customerGroupId
+     */
+    public function __construct(
+        Product $saleableItem,
+        $quantity,
+        CalculatorInterface $calculator,
+        PriceCurrencyInterface $priceCurrency,
+        Session $customerSession,
+        GroupManagementInterface $groupManagement,
+        $customerGroupId
+    ) {
+        parent::__construct(
+            $saleableItem,
+            $quantity,
+            $calculator,
+            $priceCurrency,
+            $customerSession,
+            $groupManagement
+        );
+
+        $this->customerGroup = $customerGroupId;
+    }
+}