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lib/pkp/classes/migration/Migration.php

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+<?php
+
+/**
+ * @file classes/migration/Migration.php
+ *
+ * Copyright (c) 2014-2021 Simon Fraser University
+ * Copyright (c) 2000-2021 John Willinsky
+ * Distributed under the GNU GPL v3. For full terms see the file docs/COPYING.
+ *
+ * @class Migration
+ *
+ * @brief Base class for PKP migrations.
+ */
+
+namespace PKP\migration;
+
+use PKP\install\Installer;
+
+abstract class Migration extends \Illuminate\Database\Migrations\Migration
+{
+    protected array $_attributes;
+    protected Installer $_installer;
+
+    /**
+     * Constructor
+     */
+    public function __construct(Installer $installer, array $attributes)
+    {
+        $this->_attributes = $attributes;
+        $this->_installer = $installer;
+    }
+
+    /**
+     * Run the migrations.
+     */
+    abstract public function up(): void;
+
+    /**
+     * Reverse the migration.
+     */
+    abstract public function down(): void;
+}