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<?php
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */
namespace Magento\Framework\Module\Setup;

use Magento\Framework\App\Filesystem\DirectoryList;
use Magento\Framework\Filesystem;
use Magento\Framework\Setup\ModuleDataSetupInterface;

/**
 * Resource setup model with methods needed for migration process between Magento versions
 *
 * @api
 * @SuppressWarnings(PHPMD.ExcessiveParameterList)
 * @SuppressWarnings(PHPMD.CouplingBetweenObjects)
 * @since 100.0.2
 */
class Migration
{
    /**#@+
     * Type of field content where class alias is used
     */
    const FIELD_CONTENT_TYPE_PLAIN = 'plain';

    const FIELD_CONTENT_TYPE_XML = 'xml';

    const FIELD_CONTENT_TYPE_WIKI = 'wiki';

    const FIELD_CONTENT_TYPE_SERIALIZED = 'serialized';

    /**#@-*/

    /**#@+
     *  Entity type of alias
     */
    const ENTITY_TYPE_MODEL = 'Model';

    const ENTITY_TYPE_BLOCK = 'Block';

    const ENTITY_TYPE_RESOURCE = 'Model_Resource';

    /**#@-*/

    /**#@+
     *  Replace pattern
     */
    const SERIALIZED_REPLACE_PATTERN = 's:%d:"%s"';

    /**#@-*/

    /**#@-*/
    protected $_confPathToMapFile;

    /**
     * List of possible entity types sorted by possibility of usage
     *
     * @var array
     */
    protected $_entityTypes = [self::ENTITY_TYPE_MODEL, self::ENTITY_TYPE_BLOCK, self::ENTITY_TYPE_RESOURCE];

    /**
     * Rows per page. To split processing data from tables
     *
     * @var int
     */
    protected $_rowsPerPage = 100;

    /**
     * Replace rules for tables
     *
     * [table name] => array(
     *     [field name] => array(
     *         'entity_type'      => [entity type]
     *         'content_type'     => [content type]
     *         'additional_where' => [additional where]
     *     )
     * )
     *
     * @var array
     */
    protected $_replaceRules = [];

    /**
     * Aliases to classes map
     *
     * [entity type] => array(
     *     [alias] => [class name]
     * )
     *
     * @var array
     */
    protected $_aliasesMap;

    /**
     * Replacement regexps for specified content types
     *
     * @var array
     */
    protected $_replacePatterns = [];

    /**
     * Path to map file from config
     *
     * @var string
     */
    protected $_pathToMapFile;

    /**
     * List of composite module names
     *
     * @var array
     */
    protected $_compositeModules;

    /**
     * @var \Magento\Framework\Filesystem\Directory\Read
     */
    protected $_directory;

    /**
     * @var MigrationData
     */
    protected $_migrationData;

    /**
     * @var ModuleDataSetupInterface
     */
    private $setup;

    /**
     * @var \Magento\Framework\Serialize\Serializer\Json
     */
    private $serializer;

    /**
     * @param ModuleDataSetupInterface $setup
     * @param Filesystem $filesystem
     * @param MigrationData $migrationData
     * @param string $confPathToMapFile
     * @param array $compositeModules
     * @param \Magento\Framework\Serialize\Serializer\Json|null $serializer
     * @throws \RuntimeException
     */
    public function __construct(
        ModuleDataSetupInterface $setup,
        Filesystem $filesystem,
        MigrationData $migrationData,
        $confPathToMapFile,
        $compositeModules = [],
        \Magento\Framework\Serialize\Serializer\Json $serializer = null
    ) {
        $this->_directory = $filesystem->getDirectoryRead(DirectoryList::ROOT);
        $this->_pathToMapFile = $confPathToMapFile;
        $this->_migrationData = $migrationData;
        $this->_replacePatterns = [
            self::FIELD_CONTENT_TYPE_WIKI => $this->_migrationData->getWikiFindPattern(),
            self::FIELD_CONTENT_TYPE_XML => $this->_migrationData->getXmlFindPattern(),
        ];
        $this->_compositeModules = $compositeModules;
        $this->setup = $setup;
        $this->serializer = $serializer?: \Magento\Framework\App\ObjectManager::getInstance()
            ->get(\Magento\Framework\Serialize\Serializer\Json::class);
    }

    /**
     * Add alias replace rule
     *
     * @param string $tableName name of table to replace aliases in
     * @param string $fieldName name of table column to replace aliases in
     * @param string $entityType entity type of alias
     * @param string $fieldContentType type of field content where class alias is used
     * @param array $primaryKeyFields row pk field(s) to update by
     * @param string $additionalWhere additional where condition
     * @return void
     */
    public function appendClassAliasReplace(
        $tableName,
        $fieldName,
        $entityType = '',
        $fieldContentType = self::FIELD_CONTENT_TYPE_PLAIN,
        array $primaryKeyFields = [],
        $additionalWhere = ''
    ) {
        if (!isset($this->_replaceRules[$tableName])) {
            $this->_replaceRules[$tableName] = [];
        }

        if (!isset($this->_replaceRules[$tableName][$fieldName])) {
            $this->_replaceRules[$tableName][$fieldName] = [
                'entity_type' => $entityType,
                'content_type' => $fieldContentType,
                'pk_fields' => $primaryKeyFields,
                'additional_where' => $additionalWhere,
            ];
        }
    }

    /**
     * Start process of replacing aliases with class names using rules
     *
     * @return void
     */
    public function doUpdateClassAliases()
    {
        foreach ($this->_replaceRules as $tableName => $tableRules) {
            $this->_updateClassAliasesInTable($tableName, $tableRules);
        }
    }

    /**
     * Update class aliases in table
     *
     * @param string $tableName name of table to replace aliases in
     * @param array $tableRules replacing rules for table
     * @return void
     */
    protected function _updateClassAliasesInTable($tableName, array $tableRules)
    {
        foreach ($tableRules as $fieldName => $fieldRule) {
            $pagesCount = ceil(
                $this->_getRowsCount($tableName, $fieldName, $fieldRule['additional_where']) / $this->_rowsPerPage
            );

            for ($page = 1; $page <= $pagesCount; $page++) {
                $this->_applyFieldRule($tableName, $fieldName, $fieldRule, $page);
            }
        }
    }

    /**
     * Get amount of rows for table column which should be processed
     *
     * @param string $tableName name of table to replace aliases in
     * @param string $fieldName name of table column to replace aliases in
     * @param string $additionalWhere additional where condition
     * @return int
     */
    protected function _getRowsCount($tableName, $fieldName, $additionalWhere = '')
    {
        $connection = $this->setup->getConnection();

        $query = $connection->select()->from(
            $this->setup->getTable($tableName),
            ['rows_count' => new \Zend_Db_Expr('COUNT(*)')]
        )->where(
            $fieldName . ' IS NOT NULL'
        );

        if (!empty($additionalWhere)) {
            $query->where($additionalWhere);
        }

        return (int)$connection->fetchOne($query);
    }

    /**
     * Replace aliases with class names in rows
     *
     * @param string $tableName name of table to replace aliases in
     * @param string $fieldName name of table column to replace aliases in
     * @param array $fieldRule
     * @param int $currentPage
     * @return void
     */
    protected function _applyFieldRule($tableName, $fieldName, array $fieldRule, $currentPage = 0)
    {
        $fieldsToSelect = [$fieldName];
        if (!empty($fieldRule['pk_fields'])) {
            $fieldsToSelect = array_merge($fieldsToSelect, $fieldRule['pk_fields']);
        }
        $tableData = $this->_getTableData(
            $tableName,
            $fieldName,
            $fieldsToSelect,
            $fieldRule['additional_where'],
            $currentPage
        );

        $fieldReplacements = [];
        foreach ($tableData as $rowData) {
            $replacement = $this->_getReplacement(
                $rowData[$fieldName],
                $fieldRule['content_type'],
                $fieldRule['entity_type']
            );
            if ($replacement !== $rowData[$fieldName]) {
                $fieldReplacement = ['to' => $replacement];
                if (empty($fieldRule['pk_fields'])) {
                    $fieldReplacement['where_fields'] = [$fieldName => $rowData[$fieldName]];
                } else {
                    $fieldReplacement['where_fields'] = [];
                    foreach ($fieldRule['pk_fields'] as $pkField) {
                        $fieldReplacement['where_fields'][$pkField] = $rowData[$pkField];
                    }
                }
                $fieldReplacements[] = $fieldReplacement;
            }
        }

        $this->_updateRowsData($tableName, $fieldName, $fieldReplacements);
    }

    /**
     * Update rows data in database
     *
     * @param string $tableName
     * @param string $fieldName
     * @param array $fieldReplacements
     * @return void
     */
    protected function _updateRowsData($tableName, $fieldName, array $fieldReplacements)
    {
        if (count($fieldReplacements) > 0) {
            $connection = $this->setup->getConnection();

            foreach ($fieldReplacements as $fieldReplacement) {
                $where = [];
                foreach ($fieldReplacement['where_fields'] as $whereFieldName => $value) {
                    $where[$connection->quoteIdentifier($whereFieldName) . ' = ?'] = $value;
                }
                $connection->update(
                    $this->setup->getTable($tableName),
                    [$fieldName => $fieldReplacement['to']],
                    $where
                );
            }
        }
    }

    /**
     * Get data for table column which should be processed
     *
     * @param string $tableName name of table to replace aliases in
     * @param string $fieldName name of table column to replace aliases in
     * @param array $fieldsToSelect array of fields to select
     * @param string $additionalWhere additional where condition
     * @param int $currPage
     * @return array
     */
    protected function _getTableData(
        $tableName,
        $fieldName,
        array $fieldsToSelect,
        $additionalWhere = '',
        $currPage = 0
    ) {
        $connection = $this->setup->getConnection();

        $query = $connection->select()->from(
            $this->setup->getTable($tableName),
            $fieldsToSelect
        )->where(
            $fieldName . ' IS NOT NULL'
        );

        if (!empty($additionalWhere)) {
            $query->where($additionalWhere);
        }

        if ($currPage) {
            $query->limitPage($currPage, $this->_rowsPerPage);
        }

        return $connection->fetchAll($query);
    }

    /**
     * Get data with replaced aliases with class names
     *
     * @param string $data
     * @param string $contentType type of data (field content)
     * @param string $entityType entity type of alias
     * @return string
     */
    protected function _getReplacement($data, $contentType, $entityType = '')
    {
        switch ($contentType) {
            case self::FIELD_CONTENT_TYPE_SERIALIZED:
                $data = $this->_getAliasInSerializedStringReplacement($data, $entityType);
                break;
                // wiki and xml content types use the same replacement method
            case self::FIELD_CONTENT_TYPE_WIKI:
            case self::FIELD_CONTENT_TYPE_XML:
                $data = $this->_getPatternReplacement($data, $contentType, $entityType);
                break;
            case self::FIELD_CONTENT_TYPE_PLAIN:
            default:
                $data = $this->_getModelReplacement($data, $entityType);
                break;
        }

        return $data;
    }

    /**
     * Get appropriate class name for alias
     *
     * @param string $alias
     * @param string $entityType entity type of alias
     * @return string
     */
    protected function _getCorrespondingClassName($alias, $entityType = '')
    {
        if ($this->_isFactoryName($alias)) {
            if ($className = $this->_getAliasFromMap($alias, $entityType)) {
                return $className;
            }

            list($module, $name) = $this->_getModuleName($alias);

            if (!empty($entityType)) {
                $className = $this->_getClassName($module, $entityType, $name);
                $properEntityType = $entityType;
            } else {
                // Try to find appropriate class name for all entity types
                $className = '';
                $properEntityType = '';
                foreach ($this->_entityTypes as $entityType) {
                    if (empty($className)) {
                        $className = $this->_getClassName($module, $entityType, $name);
                        $properEntityType = $entityType;
                    } else {
                        // If was found more than one match - alias cannot be replaced
                        return '';
                    }
                }
            }
            $this->_pushToMap($properEntityType, $alias, $className);
            return $className;
        }

        return '';
    }

    /**
     * Replacement for model alias and model alias with method
     *
     * @param string $data
     * @param string $entityType
     * @return string
     */
    protected function _getModelReplacement($data, $entityType = '')
    {
        if (preg_match($this->_migrationData->getPlainFindPattern(), $data, $matches)) {
            $classAlias = $matches['alias'];
            $className = $this->_getCorrespondingClassName($classAlias, $entityType);
            if ($className) {
                return str_replace($classAlias, $className, $data);
            }
        }

        $className = $this->_getCorrespondingClassName($data, $entityType);
        if (!empty($className)) {
            return $className;
        } else {
            return $data;
        }
    }

    /**
     * Replaces class aliases using pattern
     *
     * @param string $data
     * @param string $contentType
     * @param string $entityType
     * @return string|null
     */
    protected function _getPatternReplacement($data, $contentType, $entityType = '')
    {
        if (!array_key_exists($contentType, $this->_replacePatterns)) {
            return null;
        }

        $replacements = [];
        $pattern = $this->_replacePatterns[$contentType];
        preg_match_all($pattern, $data, $matches, PREG_PATTERN_ORDER);
        if (isset($matches['alias'])) {
            $matches = array_unique($matches['alias']);
            foreach ($matches as $classAlias) {
                $className = $this->_getCorrespondingClassName($classAlias, $entityType);
                if ($className) {
                    $replacements[$classAlias] = $className;
                }
            }
        }

        foreach ($replacements as $classAlias => $className) {
            $data = str_replace($classAlias, $className, $data);
        }

        return $data;
    }

    /**
     * Generate class name
     *
     * @param string $module
     * @param string $type
     * @param string $name
     * @return string
     */
    protected function _getClassName($module, $type, $name = null)
    {
        $className = implode('\\', array_map('ucfirst', explode('_', $module . '_' . $type . '_' . $name)));

        if (class_exists($className)) {
            return $className;
        }

        return '';
    }

    /**
     * Whether the given class name is a factory name
     *
     * @param string $factoryName
     * @return bool
     */
    protected function _isFactoryName($factoryName)
    {
        return false !== strpos($factoryName, '/') || preg_match('/^[a-z\d]+(_[A-Za-z\d]+)?$/', $factoryName);
    }

    /**
     * Transform factory name into a pair of module and name
     *
     * @param string $factoryName
     * @return array
     */
    protected function _getModuleName($factoryName)
    {
        if (false !== strpos($factoryName, '/')) {
            list($module, $name) = explode('/', $factoryName);
        } else {
            $module = $factoryName;
            $name = false;
        }
        $compositeModuleName = $this->_getCompositeModuleName($module);
        if (null !== $compositeModuleName) {
            $module = $compositeModuleName;
        } elseif (false === strpos($module, '_')) {
            $module = "Magento_{$module}";
        }
        return [$module, $name];
    }

    /**
     * Get composite module name by module alias
     *
     * @param string $moduleAlias
     * @return string|null
     */
    protected function _getCompositeModuleName($moduleAlias)
    {
        if (array_key_exists($moduleAlias, $this->_compositeModules)) {
            return $this->_compositeModules[$moduleAlias];
        }
        return null;
    }

    /**
     * Search class by alias in map
     *
     * @param string $alias
     * @param string $entityType
     * @return string
     */
    protected function _getAliasFromMap($alias, $entityType = '')
    {
        if ($map = $this->_getAliasesMap()) {
            if (!empty($entityType) && isset($map[$entityType]) && !empty($map[$entityType][$alias])) {
                return $map[$entityType][$alias];
            } else {
                $className = '';
                foreach ($this->_entityTypes as $entityType) {
                    if (empty($className)) {
                        if (isset($map[$entityType]) && !empty($map[$entityType][$alias])) {
                            $className = $map[$entityType][$alias];
                        }
                    } else {
                        return '';
                    }
                }
                return $className;
            }
        }

        return '';
    }

    /**
     * Store already generated class name for alias
     *
     * @param string $entityType
     * @param string $alias
     * @param string $className
     * @return void
     */
    protected function _pushToMap($entityType, $alias, $className)
    {
        // Load map from file if it wasn't loaded
        $this->_getAliasesMap();

        if (!isset($this->_aliasesMap[$entityType])) {
            $this->_aliasesMap[$entityType] = [];
        }

        if (!isset($this->_aliasesMap[$entityType][$alias])) {
            $this->_aliasesMap[$entityType][$alias] = $className;
        }
    }

    /**
     * Retrieve aliases to classes map if exit
     *
     * @return array
     */
    protected function _getAliasesMap()
    {
        if (null === $this->_aliasesMap) {
            $this->_aliasesMap = [];

            $map = $this->_loadMap($this->_pathToMapFile);

            if (!empty($map)) {
                $this->_aliasesMap = $this->_jsonDecode($map);
            }
        }

        return $this->_aliasesMap;
    }

    /**
     * Load aliases to classes map from file
     *
     * @param string $pathToMapFile
     * @return string
     */
    protected function _loadMap($pathToMapFile)
    {
        if ($this->_directory->isFile($pathToMapFile)) {
            return $this->_directory->readFile($pathToMapFile);
        }

        return '';
    }

    /**
     * @param string $data
     * @param string $entityType
     * @return string
     */
    protected function _getAliasInSerializedStringReplacement($data, $entityType = '')
    {
        $matches = $this->_parseSerializedString($data);
        if (isset($matches['alias']) && count($matches['alias']) > 0) {
            foreach ($matches['alias'] as $key => $alias) {
                $className = $this->_getCorrespondingClassName($alias, $entityType);

                if (!empty($className)) {
                    $replaceString = sprintf(self::SERIALIZED_REPLACE_PATTERN, strlen($className), $className);
                    $data = str_replace($matches['string'][$key], $replaceString, $data);
                }
            }
        }

        return $data;
    }

    /**
     * Parse class aliases from serialized string
     *
     * @param string $string
     * @return array
     */
    protected function _parseSerializedString($string)
    {
        if ($string && preg_match_all($this->_migrationData->getSerializedFindPattern(), $string, $matches)) {
            unset($matches[0], $matches[1], $matches[2]);
            return $matches;
        } else {
            return [];
        }
    }

    /**
     * List of correspondence between composite module aliases and module names
     *
     * @return array
     */
    public function getCompositeModules()
    {
        return $this->_compositeModules;
    }

    /**
     * Decodes the given $encodedValue string which is
     * encoded in the JSON format
     *
     * @param string $encodedValue
     * @param int $objectDecodeType
     * @return string|int|float|bool|array|null
     * @throws \InvalidArgumentException
     * @SuppressWarnings(PHPMD.UnusedFormalParameter)
     * @deprecated 101.0.1
     * @see \Magento\Framework\Module\Setup\Migration::jsonDecode
     */
    protected function _jsonDecode($encodedValue, $objectDecodeType = 1)
    {
        return $this->jsonDecode($encodedValue);
    }

    /**
     * Decodes the given $encodedValue string which is
     * encoded in the JSON format
     *
     * @param string $encodedValue
     * @return string|int|float|bool|array|null
     * @throws \InvalidArgumentException
     */
    private function jsonDecode($encodedValue)
    {
        return $this->serializer->unserialize($encodedValue);
    }
}