1<?php
2/**
3 * Copyright (C) 2018 Kunal Mehta <legoktm@member.fsf.org>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 */
20
21namespace MediaWiki\Interwiki;
22
23/**
24 * An interwiki lookup that has no data, intended
25 * for use in the installer.
26 *
27 * @since 1.31
28 */
29class NullInterwikiLookup implements InterwikiLookup {
30
31	/**
32	 * @inheritDoc
33	 */
34	public function isValidInterwiki( $prefix ) {
35		return false;
36	}
37
38	/**
39	 * @inheritDoc
40	 */
41	public function fetch( $prefix ) {
42		return false;
43	}
44
45	/**
46	 * @inheritDoc
47	 */
48	public function getAllPrefixes( $local = null ) {
49		return [];
50	}
51
52	/**
53	 * @inheritDoc
54	 */
55	public function invalidateCache( $prefix ) {
56	}
57}
58