Implement database schema Migrator

This commit implements the new database schema Migrator which keeps
track of the on-disk schema and the schema used by the codebase. It
tries to makes future database schema upgrades user-friendlier.

1 files changed, 14 insertions, 0 deletions

diff --git a/core/namespace/Application.php b/core/namespace/Application.php
index 3cecf3b..829f758 100644
--- a/core/namespace/Application.php
+++ b/core/namespace/Application.php
@@ -6,6 +6,7 @@ class Application {
 	#===============================================================================
 	private static $Database;
 	private static $Language;
+	private static $Migrator;
 	private static $repositories = [];
 
 	#===============================================================================
@@ -81,6 +82,19 @@ class Application {
 	}
 
 	#===============================================================================
+	# Return singleton Migrator instance
+	#===============================================================================
+	public static function getMigrator(): Migrator {
+		if(!self::$Migrator instanceof Migrator) {
+			$Migrator = new Migrator(self::getDatabase());
+			$Migrator->setMigrationsDir(ROOT.'core/db/migrations/');
+			self::$Migrator = $Migrator;
+		}
+
+		return self::$Migrator;
+	}
+
+	#===============================================================================
 	# Return singleton repository instance
 	#===============================================================================
 	public static function getRepository(string $namespace): Repository {