MC-18332: Remove MySQL Search Engine

- restore setup file
- remove test

Author: cpartica

app/code/Magento/CatalogSearch/Setup/Patch/Data/SetInitialSearchWeightForAttributes.php

@@ -0,0 +1,106 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+
+namespace Magento\CatalogSearch\Setup\Patch\Data;
+
+use Magento\Catalog\Api\ProductAttributeRepositoryInterface;
+use Magento\Framework\App\State;
+use Magento\Framework\Indexer\IndexerInterfaceFactory;
+use Magento\Framework\Setup\Patch\DataPatchInterface;
+use Magento\Framework\Setup\Patch\PatchVersionInterface;
+
+/**
+ * This patch sets up search weight for the product's system attributes, reindex required after patch applying.
+ */
+class SetInitialSearchWeightForAttributes implements DataPatchInterface, PatchVersionInterface
+{
+    /**
+     * @var IndexerInterfaceFactory
+     */
+    private $indexerFactory;
+
+    /**
+     * @var ProductAttributeRepositoryInterface
+     */
+    private $attributeRepository;
+
+    /**
+     * @var State
+     */
+    private $state;
+
+    /**
+     * SetInitialSearchWeightForAttributes constructor.
+     * @param IndexerInterfaceFactory $indexerFactory
+     * @param ProductAttributeRepositoryInterface $attributeRepository
+     * @param State $state
+     */
+    public function __construct(
+        IndexerInterfaceFactory $indexerFactory,
+        ProductAttributeRepositoryInterface $attributeRepository,
+        State $state
+    ) {
+        $this->indexerFactory = $indexerFactory;
+        $this->attributeRepository = $attributeRepository;
+        $this->state = $state;
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function apply()
+    {
+        $this->setWeight('sku', 6);
+        $this->setWeight('name', 5);
+        $indexer = $this->indexerFactory->create()->load('catalogsearch_fulltext');
+        $this->state->emulateAreaCode(
+            \Magento\Framework\App\Area::AREA_CRONTAB,
+            function () use ($indexer) {
+                $indexer->getState()
+                    ->setStatus(\Magento\Framework\Indexer\StateInterface::STATUS_INVALID)
+                    ->save();
+            }
+        );
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public static function getDependencies()
+    {
+        return [];
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public static function getVersion()
+    {
+        return '2.0.0';
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function getAliases()
+    {
+        return [];
+    }
+
+    /**
+     * Set attribute search weight.
+     *
+     * @param string $attributeCode
+     * @param int $weight
+     * @return void
+     */
+    private function setWeight($attributeCode, $weight)
+    {
+        $attribute = $this->attributeRepository->get($attributeCode);
+        $attribute->setSearchWeight($weight);
+        $this->attributeRepository->save($attribute);
+    }
+}