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<?php
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */

namespace Magento\Framework\Setup\Patch;

use Magento\Framework\App\ResourceConnection;

/**
 * This is registry of all patches, that are already applied on database
 */
class PatchHistory
{
    /**
     * Table name where patche names will be persisted
     */
    const TABLE_NAME = 'patch_list';

    /**
     * Name of a patch
     */
    const CLASS_NAME = "patch_name";

    /**
     * Patch type for schema patches
     */
    const SCHEMA_PATCH_TYPE = 'schema';

    /**
     * Patch type for data patches
     */
    const DATA_PATCH_TYPE = 'data';

    /**
     * @var array
     */
    private $patchesRegistry = null;

    /**
     * @var ResourceConnection
     */
    private $resourceConnection;

    /**
     * PatchHistory constructor.
     * @param ResourceConnection $resourceConnection
     */
    public function __construct(ResourceConnection $resourceConnection)
    {
        $this->resourceConnection = $resourceConnection;
    }

    /**
     * Read and cache data patches from db
     *
     * All patches are store in patch_list table
     *
     * @see self::TABLE_NAME
     * @return string[]
     */
    private function getAppliedPatches()
    {
        if ($this->patchesRegistry === null) {
            $adapter = $this->resourceConnection->getConnection();
            $filterSelect = $adapter
                ->select()
                ->from($this->resourceConnection->getTableName(self::TABLE_NAME), self::CLASS_NAME);
            $this->patchesRegistry = $adapter->fetchCol($filterSelect);
        }

        return $this->patchesRegistry;
    }

    /**
     * Fix patch in patch table in order to avoid reapplying of patch
     *
     * @param string $patchName
     * @return void
     */
    public function fixPatch($patchName)
    {
        if ($this->isApplied($patchName)) {
            throw new \LogicException(sprintf("Patch %s cannot be applied twice", $patchName));
        }

        $adapter = $this->resourceConnection->getConnection();
        $adapter->insert($this->resourceConnection->getTableName(self::TABLE_NAME), [self::CLASS_NAME => $patchName]);

        $this->patchesRegistry[] = $patchName;
    }

    /**
     * Revert patch from history
     *
     * @param string $patchName
     * @return void
     */
    public function revertPatchFromHistory($patchName)
    {
        if (!$this->isApplied($patchName)) {
            throw new \LogicException(
                sprintf("Patch %s should be applied, before you can revert it", $patchName)
            );
        }

        $adapter = $this->resourceConnection->getConnection();
        $adapter->delete(
            $this->resourceConnection->getTableName(self::TABLE_NAME),
            [self::CLASS_NAME . "= ?" => $patchName]
        );
    }

    /**
     * Check whether patch was applied on the system or not
     *
     * @param string $patchName
     * @return bool
     */
    public function isApplied($patchName)
    {
        return in_array($patchName, $this->getAppliedPatches());
    }
}