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1 | <?php |
2 | /** |
3 | * This program is free software; you can redistribute it and/or modify |
4 | * it under the terms of the GNU General Public License as published by |
5 | * the Free Software Foundation; either version 2 of the License, or |
6 | * (at your option) any later version. |
7 | * |
8 | * This program is distributed in the hope that it will be useful, |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
11 | * GNU General Public License for more details. |
12 | * |
13 | * You should have received a copy of the GNU General Public License along |
14 | * with this program; if not, write to the Free Software Foundation, Inc., |
15 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
16 | * http://www.gnu.org/copyleft/gpl.html |
17 | * |
18 | * @file |
19 | */ |
20 | |
21 | namespace MediaWiki\EditPage\Constraint; |
22 | |
23 | use Content; |
24 | use MediaWiki\Linker\LinkTarget; |
25 | use StatusValue; |
26 | |
27 | /** |
28 | * Verify the page does not redirect to itself unless |
29 | * - the user is okay with a self redirect, or |
30 | * - the page already redirected to itself before the edit |
31 | * |
32 | * @since 1.36 |
33 | * @internal |
34 | */ |
35 | class SelfRedirectConstraint implements IEditConstraint { |
36 | |
37 | /** @var bool */ |
38 | private $allowSelfRedirect; |
39 | |
40 | /** @var Content */ |
41 | private $newContent; |
42 | |
43 | /** @var Content */ |
44 | private $originalContent; |
45 | |
46 | /** @var LinkTarget */ |
47 | private $title; |
48 | |
49 | /** @var string|null */ |
50 | private $result; |
51 | |
52 | /** |
53 | * @param bool $allowSelfRedirect |
54 | * @param Content $newContent |
55 | * @param Content $originalContent |
56 | * @param LinkTarget $title |
57 | */ |
58 | public function __construct( |
59 | bool $allowSelfRedirect, |
60 | Content $newContent, |
61 | Content $originalContent, |
62 | LinkTarget $title |
63 | ) { |
64 | $this->allowSelfRedirect = $allowSelfRedirect; |
65 | $this->newContent = $newContent; |
66 | $this->originalContent = $originalContent; |
67 | $this->title = $title; |
68 | } |
69 | |
70 | public function checkConstraint(): string { |
71 | if ( !$this->allowSelfRedirect |
72 | && $this->newContent->isRedirect() |
73 | && $this->newContent->getRedirectTarget()->equals( $this->title ) |
74 | ) { |
75 | // T29683 If the page already redirects to itself, don't warn. |
76 | $currentTarget = $this->originalContent->getRedirectTarget(); |
77 | if ( !$currentTarget || !$currentTarget->equals( $this->title ) ) { |
78 | $this->result = self::CONSTRAINT_FAILED; |
79 | return self::CONSTRAINT_FAILED; |
80 | } |
81 | } |
82 | $this->result = self::CONSTRAINT_PASSED; |
83 | return self::CONSTRAINT_PASSED; |
84 | } |
85 | |
86 | public function getLegacyStatus(): StatusValue { |
87 | $statusValue = StatusValue::newGood(); |
88 | if ( $this->result === self::CONSTRAINT_FAILED ) { |
89 | $statusValue->fatal( 'selfredirect' ); |
90 | $statusValue->value = self::AS_SELF_REDIRECT; |
91 | } |
92 | return $statusValue; |
93 | } |
94 | |
95 | } |