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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 MediaWiki\Content\Content; |
| 24 | use MediaWiki\Linker\LinkTarget; |
| 25 | use StatusValue; |
| 26 | |
| 27 | /** |
| 28 | * Verify the page does not redirect to a nonexistent page unless |
| 29 | * - the user is okay with a broken redirect, or |
| 30 | * - the page already redirected to a nonexistent page before the edit |
| 31 | * |
| 32 | * @since 1.44 |
| 33 | * @internal |
| 34 | */ |
| 35 | class BrokenRedirectConstraint implements IEditConstraint { |
| 36 | |
| 37 | private bool $allowBrokenRedirects; |
| 38 | private Content $newContent; |
| 39 | private Content $originalContent; |
| 40 | private LinkTarget $title; |
| 41 | private string $result; |
| 42 | |
| 43 | /** |
| 44 | * @param bool $allowBrokenRedirects |
| 45 | * @param Content $newContent |
| 46 | * @param Content $originalContent |
| 47 | * @param LinkTarget $title |
| 48 | */ |
| 49 | public function __construct( |
| 50 | bool $allowBrokenRedirects, |
| 51 | Content $newContent, |
| 52 | Content $originalContent, |
| 53 | LinkTarget $title |
| 54 | ) { |
| 55 | $this->allowBrokenRedirects = $allowBrokenRedirects; |
| 56 | $this->newContent = $newContent; |
| 57 | $this->originalContent = $originalContent; |
| 58 | $this->title = $title; |
| 59 | } |
| 60 | |
| 61 | public function checkConstraint(): string { |
| 62 | if ( !$this->allowBrokenRedirects ) { |
| 63 | $newRedirectTarget = $this->newContent->getRedirectTarget(); |
| 64 | |
| 65 | if ( $newRedirectTarget !== null && !$newRedirectTarget->exists() && |
| 66 | !$newRedirectTarget->equals( $this->title ) ) { |
| 67 | $currentTarget = $this->originalContent->getRedirectTarget(); |
| 68 | |
| 69 | // fail if there was no previous content or the previous content contained |
| 70 | // a redirect to an existing page |
| 71 | if ( !$currentTarget || $currentTarget->exists() ) { |
| 72 | $this->result = self::CONSTRAINT_FAILED; |
| 73 | |
| 74 | return self::CONSTRAINT_FAILED; |
| 75 | } |
| 76 | } |
| 77 | |
| 78 | } |
| 79 | $this->result = self::CONSTRAINT_PASSED; |
| 80 | |
| 81 | return self::CONSTRAINT_PASSED; |
| 82 | } |
| 83 | |
| 84 | public function getLegacyStatus(): StatusValue { |
| 85 | $statusValue = StatusValue::newGood(); |
| 86 | if ( $this->result === self::CONSTRAINT_FAILED ) { |
| 87 | $statusValue->fatal( 'edit-constraint-brokenredirect' ); |
| 88 | $statusValue->value = self::AS_BROKEN_REDIRECT; |
| 89 | } |
| 90 | |
| 91 | return $statusValue; |
| 92 | } |
| 93 | |
| 94 | } |