Add student progress migration

changelog/add-data-migrator

@@ -0,0 +1,4 @@
+Significance: minor
+Type: added
+
+Add student progress migration

includes/class-sensei.php

@@ -18,6 +18,7 @@
 use Sensei\Internal\Student_Progress\Services\Lesson_Deleted_Handler;
 use Sensei\Internal\Student_Progress\Services\Quiz_Deleted_Handler;
 use Sensei\Internal\Student_Progress\Services\User_Deleted_Handler;
+use Sensei\Internal\Student_Progress\Tools\Migration_Tool;
 
 if ( ! defined( 'ABSPATH' ) ) {
 	exit;
@@ -571,6 +572,11 @@
 		$this->lesson_progress_repository = ( new Lesson_Progress_Repository_Factory( $use_tables ) )->create();
 		$this->quiz_progress_repository   = ( new Quiz_Progress_Repository_Factory( $use_tables ) )->create();
 
+		// Student progress migration.
+		if ( $use_tables ) {
+			( new Migration_Tool( \Sensei_Tools::instance() ) )->init();
+		}
+
 		// Quiz submission repositories.
 		$this->quiz_submission_repository = ( new Submission_Repository_Factory( $use_tables ) )->create();
 		$this->quiz_answer_repository     = ( new Answer_Repository_Factory( $use_tables ) )->create();

includes/internal/installer/class-migration.php

@@ -0,0 +1,42 @@
+<?php
+/**
+ * File containing the interface \Sensei\Internal\Installer\Migration.
+ *
+ * @package sensei
+ * @since $$next-version$$
+ */
+
+namespace Sensei\Internal\Installer;
+
+/**
+ * Migration interface.
+ *
+ * @since $$next-version$$
+ */
+interface Migration {
+	/**
+	 * The targeted plugin version.
+	 *
+	 * @since $$next-version$$
+	 *
+	 * @return string
+	 */
+	public function target_version(): string;
+
+	/**
+	 * Run the migration.
+	 *
+	 * @since $$next-version$$
+	 *
+	 * @param bool $dry_run Whether to run the migration in dry-run mode.
+	 */
+	public function run( bool $dry_run = true );
+
+	/**
+	 * Get the migration errors.
+	 *
+	 * @return array
+	 */
+	public function get_errors(): array;
+}
+