Improved Stock Item configuration

app/code/Magento/InventoryConfiguration/Model/GetBackorderStatusConfigurationValue.php

@@ -0,0 +1,100 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+namespace Magento\InventoryConfiguration\Model;
+
+use Magento\Framework\App\Config\ScopeConfigInterface;
+use Magento\Framework\App\ResourceConnection;
+use Magento\InventoryConfigurationApi\Api\Data\SourceItemConfigurationInterface;
+use Magento\InventoryConfigurationApi\Api\GetBackorderStatusConfigurationValueInterface;
+
+class GetBackorderStatusConfigurationValue implements GetBackorderStatusConfigurationValueInterface
+{
+    /**
+     * @var ResourceConnection;
+     */
+    private $resourceConnection;
+
+    /**
+     * @var ScopeConfigInterface
+     */
+    private $scopeConfig;
+
+    public function __construct(
+        ResourceConnection $resourceConnection,
+        ScopeConfigInterface $scopeConfig
+    ) {
+        $this->resourceConnection = $resourceConnection;
+        $this->scopeConfig = $scopeConfig;
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function forSourceItem(string $sku, string $sourceCode): ?int
+    {
+        $connection = $this->resourceConnection->getConnection();
+        $configurationTable = $this->resourceConnection->getTableName('inventory_configuration');
+        $select = $connection->select()
+            ->from($configurationTable)
+            ->where('sku = ?', $sku)
+            ->where('source_code = ?', $sourceCode)
+            ->where('config_option = ?', SourceItemConfigurationInterface::BACKORDERS);
+        $data = $connection->fetchRow($select);
+        if ($data === false || $data['value'] === null) {
+            return $this->forSource($sourceCode);
+        }
+        return (int)$data['value'];
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function forSource(string $sourceCode): ?int
+    {
+        $connection = $this->resourceConnection->getConnection();
+        $configurationTable = $this->resourceConnection->getTableName('inventory_configuration');
+        $select = $connection->select()
+            ->from($configurationTable)
+            ->where('sku IS NULL')
+            ->where('source_code = ?', $sourceCode)
+            ->where('config_option = ?', SourceItemConfigurationInterface::BACKORDERS);
+        $data = $connection->fetchRow($select);
+        if ($data === false || $data['value'] === null) {
+            return $this->forGlobal();
+        }
+        return (int)$data['value'];
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function forGlobal(): int
+    {
+        // FIXME if config value is missing, null casted to int gives 0, that's a different semantic from missing value
+        return (int)$this->scopeConfig->getValue(
+            SourceItemConfigurationInterface::XML_PATH_BACKORDERS
+        );
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function execute(string $sku = null, string $sourceCode = null): ?int
+    {
+        if ($sku !== null && $sourceCode !== null) {
+            return $this->forSourceItem($sku, $sourceCode);
+        }
+
+        if ($sourceCode !== null)
+        {
+            return $this->forSource($sourceCode);
+        }
+
+        return $this->forGlobal();
+    }
+}

app/code/Magento/InventoryConfiguration/Model/SetBackorderStatusConfigurationValue.php

@@ -0,0 +1,149 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+namespace Magento\InventoryConfiguration\Model;
+
+use Magento\Framework\App\Config\Storage\WriterInterface;
+use Magento\Framework\App\ResourceConnection;
+use Magento\InventoryConfigurationApi\Api\Data\SourceItemConfigurationInterface;
+use Magento\InventoryConfigurationApi\Api\SetBackorderStatusConfigurationValueInterface;
+
+class SetBackorderStatusConfigurationValue implements SetBackorderStatusConfigurationValueInterface
+{
+    /**
+     * @var ResourceConnection;
+     */
+    private $resourceConnection;
+
+    /**
+     * @var WriterInterface
+     */
+    private $configWriter;
+
+    public function __construct(
+        ResourceConnection $resourceConnection,
+        WriterInterface $configWriter
+    ) {
+        $this->resourceConnection = $resourceConnection;
+        $this->configWriter = $configWriter;
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function forSourceItem(string $sku, string $sourceCode, ?int $backorderStatus): void
+    {
+        // TODO should validate allowed values?
+        $connection = $this->resourceConnection->getConnection();
+        $configurationTable = $this->resourceConnection->getTableName('inventory_configuration');
+        $select = $connection->select()
+            ->from($configurationTable)
+            ->where('sku = ?', $sku)
+            ->where('source_code = ?', $sourceCode)
+            ->where('config_option = ?', SourceItemConfigurationInterface::BACKORDERS);
+        $data = $connection->fetchRow($select);
+        $isNew = false;
+        if ($data === false) {
+            $isNew = true;
+            $data = [
+                'sku' => $sku,
+                'source_code' => $sourceCode,
+                'stock_id' => null,
+                'config_option' => SourceItemConfigurationInterface::BACKORDERS,
+            ];
+        }
+        $data['value'] = $backorderStatus ? (string)$backorderStatus : null;
+        if ($isNew) {
+            $connection->insert($configurationTable, $data);
+        } else {
+            $where = [
+                'sku = ?' => $sku,
+                'source_code = ?' => $sourceCode,
+                'stock_id IS NULL',
+                'config_option = ?' => SourceItemConfigurationInterface::BACKORDERS,
+            ];
+
+            $connection->update($configurationTable, $data, $where);
+        }
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function forSource(string $sourceCode, ?int $backorderStatus): void
+    {
+        // TODO should validate allowed values?
+        $connection = $this->resourceConnection->getConnection();
+        $configurationTable = $this->resourceConnection->getTableName('inventory_configuration');
+        $select = $connection->select()
+            ->from($configurationTable)
+            ->where('sku IS NULL')
+            ->where('source_code = ?', $sourceCode)
+            ->where('stock_id IS NULL')
+            ->where('config_option = ?', SourceItemConfigurationInterface::BACKORDERS);
+        $data = $connection->fetchRow($select);
+        $isNew = false;
+        if ($data === false) {
+            $isNew = true;
+            $data = [
+                'sku' => null,
+                'source_code' => $sourceCode,
+                'stock_id' => null,
+                'config_option' => SourceItemConfigurationInterface::BACKORDERS,
+            ];
+        }
+        $data['value'] = $backorderStatus ? (string)$backorderStatus : null;
+        if ($isNew) {
+            $connection->insert($configurationTable, $data);
+        } else {
+            $where = [
+                'sku IS NULL',
+                'source_code = ?' => $sourceCode,
+                'stock_id IS NULL',
+                'config_option = ?' => SourceItemConfigurationInterface::BACKORDERS,
+            ];
+            $connection->update($configurationTable, $data, $where);
+        }
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function forGlobal(int $backorderStatus): void
+    {
+        // TODO should validate allowed values?
+        $this->configWriter->save(
+            SourceItemConfigurationInterface::XML_PATH_BACKORDERS,
+            $backorderStatus
+        );
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function execute(string $sku = null, string $sourceCode = null, string $backorderStatus = null): void
+    {
+        if ($sku !== null && $sourceCode !== null) {
+            $this->forSourceItem($sku, $sourceCode, is_numeric($backorderStatus) ? (int)$backorderStatus : null);
+            return;
+        }
+
+        if ($sourceCode !== null)
+        {
+            $this->forSource($sourceCode, is_numeric($backorderStatus) ? (int)$backorderStatus : null);
+            return;
+        }
+
+        if (!is_numeric($backorderStatus)) {
+            throw new \Magento\Framework\Exception\CouldNotSaveException(
+                __('Backorder status should be a numeric value to be saved in global scope')
+            );
+        }
+
+        $this->forGlobal((int)$backorderStatus);
+    }
+}