Drop tables on uninstall

fixes #874

appinfo/info.xml

@@ -42,4 +42,9 @@ Requirements:
 		<admin>OCA\Bookmarks\Settings\AdminSettings</admin>
 		<admin-section>OCA\Bookmarks\Settings\AdminSection</admin-section>
 	</settings>
+	<repair-steps>
+		<uninstall>
+			<step>OCA\Bookmarks\Migration\UninstallRepairStep</step>
+		</uninstall>
+	</repair-steps>
 </info>

lib/Migration/UninstallRepairStep.php

@@ -0,0 +1,50 @@
+<?php
+
+
+namespace OCA\Bookmarks\Migration;
+
+
+use OCP\IDBConnection;
+use OCP\Migration\IOutput;
+use OCP\Migration\IRepairStep;
+
+class UninstallRepairStep implements IRepairStep {
+	/**
+	 * @var IDBConnection
+	 */
+	private $db;
+
+	private $tables = [
+		'bookmarks',
+		'bookmarks_tags',
+		'bookmarks_folders',
+		'bookmarks_root_folders',
+		'bookmarks_shared_folders',
+		'bookmarks_folders_public',
+		'bookmarks_shares',
+		'bookmarks_tree',
+	];
+
+	public function __construct(IDBConnection $db) {
+		$this->db = $db;
+	}
+
+	/**
+	 * Returns the step's name
+	 */
+	public function getName() {
+		return 'Uninstall routine';
+	}
+
+	/**
+	 * @param IOutput $output
+	 */
+	public function run(IOutput $output) {
+		foreach ($this->tables as $table) {
+			$query = $this->db->prepare("DROP TABLE *PREFIX*$table");
+			$query->execute();
+		}
+		$query = $this->db->prepare("DELETE from *PREFIX*migrations WHERE app = 'bookmarks'");
+		$query->execute();
+	}
+}