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✏️ Editing: RelationController.php

<?php

declare(strict_types=1);

namespace PhpMyAdmin\Controllers\Table;

use PhpMyAdmin\ConfigStorage\Features\DisplayFeature;
use PhpMyAdmin\ConfigStorage\Features\RelationFeature;
use PhpMyAdmin\ConfigStorage\Relation;
use PhpMyAdmin\Core;
use PhpMyAdmin\DatabaseInterface;
use PhpMyAdmin\Html\Generator;
use PhpMyAdmin\Index;
use PhpMyAdmin\ResponseRenderer;
use PhpMyAdmin\Table;
use PhpMyAdmin\Template;
use PhpMyAdmin\Util;
use PhpMyAdmin\Utils\ForeignKey;

use function __;
use function array_key_exists;
use function array_keys;
use function array_values;
use function mb_strtoupper;
use function md5;
use function strtoupper;
use function uksort;
use function usort;

/**
 * Display table relations for viewing and editing.
 *
 * Includes phpMyAdmin relations and InnoDB relations.
 */
final class RelationController extends AbstractController
{
    /** @var Relation */
    private $relation;

/** @var DatabaseInterface */
    private $dbi;

public function __construct(
        ResponseRenderer $response,
        Template $template,
        string $db,
        string $table,
        Relation $relation,
        DatabaseInterface $dbi
    ) {
        parent::__construct($response, $template, $db, $table);
        $this->relation = $relation;
        $this->dbi = $dbi;
    }

/**
     * Index
     */
    public function __invoke(): void
    {
        global $route;

$options = [
            'CASCADE' => 'CASCADE',
            'SET_NULL' => 'SET NULL',
            'NO_ACTION' => 'NO ACTION',
            'RESTRICT' => 'RESTRICT',
        ];

$table = $this->dbi->getTable($this->db, $this->table);
        $storageEngine = mb_strtoupper((string) $table->getStatusInfo('Engine'));

$relationParameters = $this->relation->getRelationParameters();

$relations = [];
        if ($relationParameters->relationFeature !== null) {
            $relations = $this->relation->getForeigners($this->db, $this->table, '', 'internal');
        }

$relationsForeign = [];
        if (ForeignKey::isSupported($storageEngine)) {
            $relationsForeign = $this->relation->getForeigners($this->db, $this->table, '', 'foreign');
        }

// Send table of column names to populate corresponding dropdowns depending
        // on the current selection
        if (isset($_POST['getDropdownValues']) && $_POST['getDropdownValues'] === 'true') {
            // if both db and table are selected
            if (isset($_POST['foreignTable'])) {
                $this->getDropdownValueForTable();
            } else { // if only the db is selected
                $this->getDropdownValueForDatabase($storageEngine);
            }

return;
        }

$this->addScriptFiles(['table/relation.js', 'indexes.js']);

// Set the database
        $this->dbi->selectDb($this->db);

// updates for Internal relations
        if (isset($_POST['destination_db']) && $relationParameters->relationFeature !== null) {
            $this->updateForInternalRelation($table, $relationParameters->relationFeature, $relations);
        }

// updates for foreign keys
        $this->updateForForeignKeys($table, $options, $relationsForeign);

// Updates for display field
        if ($relationParameters->displayFeature !== null && isset($_POST['display_field'])) {
            $this->updateForDisplayField($table, $relationParameters->displayFeature);
        }

// If we did an update, refresh our data
        if (isset($_POST['destination_db']) && $relationParameters->relationFeature !== null) {
            $relations = $this->relation->getForeigners($this->db, $this->table, '', 'internal');
        }

if (isset($_POST['destination_foreign_db']) && ForeignKey::isSupported($storageEngine)) {
            $relationsForeign = $this->relation->getForeigners($this->db, $this->table, '', 'foreign');
        }

/**
         * Dialog
         */
        // Now find out the columns of our $table
        // need to use DatabaseInterface::QUERY_BUFFERED with $this->dbi->numRows()
        // in mysqli
        $columns = $this->dbi->getColumns($this->db, $this->table);

$column_array = [];
        $column_hash_array = [];
        $column_array[''] = '';
        foreach ($columns as $column) {
            if (strtoupper($storageEngine) !== 'INNODB' && empty($column['Key'])) {
                continue;
            }

$column_array[$column['Field']] = $column['Field'];
            $column_hash_array[$column['Field']] = md5($column['Field']);
        }

if ($GLOBALS['cfg']['NaturalOrder']) {
            uksort($column_array, 'strnatcasecmp');
        }

// common form
        $engine = $this->dbi->getTable($this->db, $this->table)->getStorageEngine();
        $this->render('table/relation/common_form', [
            'is_foreign_key_supported' => ForeignKey::isSupported($engine),
            'db' => $this->db,
            'table' => $this->table,
            'relation_parameters' => $relationParameters,
            'tbl_storage_engine' => $storageEngine,
            'existrel' => $relations,
            'existrel_foreign' => array_key_exists('foreign_keys_data', $relationsForeign)
                ? $relationsForeign['foreign_keys_data']
                : [],
            'options_array' => $options,
            'column_array' => $column_array,
            'column_hash_array' => $column_hash_array,
            'save_row' => array_values($columns),
            'url_params' => $GLOBALS['urlParams'],
            'databases' => $GLOBALS['dblist']->databases,
            'dbi' => $this->dbi,
            'default_sliders_state' => $GLOBALS['cfg']['InitialSlidersState'],
            'route' => $route,
        ]);
    }

/**
     * Update for display field
     */
    private function updateForDisplayField(Table $table, DisplayFeature $displayFeature): void
    {
        $table->updateDisplayField($_POST['display_field'], $displayFeature);

$this->response->addHTML(
            Generator::getMessage(
                __('Display column was successfully updated.'),
                '',
                'success'
            )
        );
    }

/**
     * Update for FK
     *
     * @param Table $table            Table
     * @param array $options          Options
     * @param array $relationsForeign External relations
     */
    private function updateForForeignKeys(Table $table, array $options, array $relationsForeign): void
    {
        $multi_edit_columns_name = $_POST['foreign_key_fields_name'] ?? null;
        $preview_sql_data = '';
        $seen_error = false;

// (for now, one index name only; we keep the definitions if the
        // foreign db is not the same)
        if (
            isset($_POST['destination_foreign_db'], $_POST['destination_foreign_table'])
            && isset($_POST['destination_foreign_column'])
        ) {
            [
                $html,
                $preview_sql_data,
                $display_query,
                $seen_error,
            ] = $table->updateForeignKeys(
                $_POST['destination_foreign_db'],
                $multi_edit_columns_name,
                $_POST['destination_foreign_table'],
                $_POST['destination_foreign_column'],
                $options,
                $this->table,
                array_key_exists('foreign_keys_data', $relationsForeign)
                    ? $relationsForeign['foreign_keys_data']
                    : []
            );
            $this->response->addHTML($html);
        }

// If there is a request for SQL previewing.
        if (isset($_POST['preview_sql'])) {
            Core::previewSQL($preview_sql_data);

exit;
        }

if (empty($display_query) || $seen_error) {
            return;
        }

$GLOBALS['display_query'] = $display_query;
        $this->response->addHTML(
            Generator::getMessage(
                __('Your SQL query has been executed successfully.'),
                null,
                'success'
            )
        );
    }

/**
     * Update for internal relation
     *
     * @param array $relations Relations
     */
    private function updateForInternalRelation(
        Table $table,
        RelationFeature $relationFeature,
        array $relations
    ): void {
        $multi_edit_columns_name = $_POST['fields_name'] ?? null;

if (
            ! $table->updateInternalRelations(
                $multi_edit_columns_name,
                $_POST['destination_db'],
                $_POST['destination_table'],
                $_POST['destination_column'],
                $relationFeature,
                $relations
            )
        ) {
            return;
        }

$this->response->addHTML(
            Generator::getMessage(
                __('Internal relationships were successfully updated.'),
                '',
                'success'
            )
        );
    }

/**
     * Send table columns for foreign table dropdown
     */
    public function getDropdownValueForTable(): void
    {
        $foreignTable = $_POST['foreignTable'];
        $table_obj = $this->dbi->getTable($_POST['foreignDb'], $foreignTable);
        // Since views do not have keys defined on them provide the full list of
        // columns
        if ($table_obj->isView()) {
            $columnList = $table_obj->getColumns(false, false);
        } else {
            $columnList = $table_obj->getIndexedColumns(false, false);
        }

if ($GLOBALS['cfg']['NaturalOrder']) {
            usort($columnList, 'strnatcasecmp');
        }

$this->response->addJSON('columns', $columnList);

// @todo should be: $server->db($db)->table($table)->primary()
        $primary = Index::getPrimary($foreignTable, $_POST['foreignDb']);
        if ($primary === false) {
            return;
        }

$this->response->addJSON('primary', array_keys($primary->getColumns()));
    }

/**
     * Send database selection values for dropdown
     *
     * @param string $storageEngine Storage engine.
     */
    public function getDropdownValueForDatabase(string $storageEngine): void
    {
        $tables = [];
        $foreign = isset($_POST['foreign']) && $_POST['foreign'] === 'true';

if ($foreign) {
            $query = 'SHOW TABLE STATUS FROM '
                . Util::backquote($_POST['foreignDb']);
            $tables_rs = $this->dbi->query($query);

foreach ($tables_rs as $row) {
                if (! isset($row['Engine']) || mb_strtoupper($row['Engine']) != $storageEngine) {
                    continue;
                }

$tables[] = $row['Name'];
            }
        } else {
            $query = 'SHOW TABLES FROM '
                . Util::backquote($_POST['foreignDb']);
            $tables_rs = $this->dbi->query($query);
            $tables = $tables_rs->fetchAllColumn();
        }

if ($GLOBALS['cfg']['NaturalOrder']) {
            usort($tables, 'strnatcasecmp');
        }

$this->response->addJSON('tables', $tables);
    }
}

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