v3.33.1

modules/forms/submissions/database/migrations/base-migration.php

@@ -0,0 +1,47 @@
+<?php
+namespace ElementorPro\Modules\Forms\Submissions\Database\Migrations;
+
+use Elementor\Core\Base\Base_Object;
+use ElementorPro\Modules\Forms\Submissions\Database\Query;
+
+if ( ! defined( 'ABSPATH' ) ) {
+	exit; // Exit if accessed directly.
+}
+
+abstract class Base_Migration extends Base_Object {
+	/*
+	 * Ref: wp-admin/includes/schema.php::wp_get_db_schema
+	 *
+	 * Indexes have a maximum size of 767 bytes. Historically, we haven't need to be concerned about that.
+	 * As of 4.2, however, we moved to utf8mb4, which uses 4 bytes per character. This means that an index which
+	 * used to have room for floor(767/3) = 255 characters, now only has room for floor(767/4) = 191 characters.
+	 */
+	const MAX_INDEX_LENGTH = 191;
+
+	/**
+	 * @var \wpdb
+	 */
+	protected $wpdb;
+
+	/**
+	 * @var Query
+	 */
+	protected $query;
+
+	/**
+	 * Base_Migration constructor.
+	 *
+	 * @param \wpdb $wpdb
+	 */
+	public function __construct( \wpdb $wpdb ) {
+		$this->wpdb = $wpdb;
+		$this->query = Query::get_instance();
+	}
+
+	/**
+	 * Run migration.
+	 *
+	 * @return void
+	 */
+	abstract public function run();
+}