added migration to create resource_members table

lib/Migration/Version000000Date20241025120000.php

@@ -0,0 +1,74 @@
+<?php
+
+declare(strict_types=1);
+
+namespace OCA\OrganizationFolders\Migration;
+
+use Closure;
+use OCP\DB\Types;
+use OCP\DB\ISchemaWrapper;
+use OCP\Migration\SimpleMigrationStep;
+use OCP\Migration\IOutput;
+
+class Version000000Date20241025120000 extends SimpleMigrationStep {
+	public const RESOURCES_TABLE = "organizationfolders_resources";
+
+	public const RESOURCE_MEMBERS_TABLE = "organizationfolders_resource_members";
+
+	/**
+	 * @param IOutput $output
+	 * @param Closure $schemaClosure The `\Closure` returns a `ISchemaWrapper`
+	 * @param array $options
+	 * @return null|ISchemaWrapper
+	 */
+	public function changeSchema(IOutput $output, Closure $schemaClosure, array $options) {
+		/** @var ISchemaWrapper $schema */
+		$schema = $schemaClosure();
+
+		if (!$schema->hasTable(self::RESOURCE_MEMBERS_TABLE)) {
+			$table = $schema->createTable(self::RESOURCE_MEMBERS_TABLE);
+			$table->addColumn('id', Types::INTEGER, [
+				'autoincrement' => true,
+				'notnull' => true,
+			]);
+			$table->addColumn('resource_id', Types::INTEGER, [
+				'notnull' => true,
+			]);
+            // 0: member
+            // 1: manager
+			$table->addColumn('permission_level', Types::INTEGER, [
+				'notnull' => true,
+			]);
+            // 0: user
+            // 1: group
+            // 2: role
+			$table->addColumn('type', Types::INTEGER, [
+				'notnull' => true,
+			]);
+            // for type user: "[user_id]"
+            // for type group: "[group_name]"
+            // for type role: "[organization_provider_id]:[role_id]"
+			$table->addColumn('principal', Types::STRING, [
+                'length' => 128,
+				'notnull' => true,
+			]);
+			$table->addColumn('created_timestamp', Types::BIGINT, [
+				'notnull' => true,
+			]);
+            $table->addColumn('last_updated_timestamp', Types::BIGINT, [
+				'notnull' => true,
+			]);
+			
+			$table->setPrimaryKey(['id']);
+			$table->addForeignKeyConstraint(
+				$schema->getTable(self::RESOURCES_TABLE),
+				['resource_id'],
+				['id'],
+				['onDelete' => 'CASCADE'],
+				'organizationfolders_resource_members_resource_id_fk');
+            $table->addIndex(['resource_id'], 'organizationfolders_resource_members_resource_id_index');
+		}
+
+		return $schema;
+	}
+}