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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 | namespace MediaWiki\Linker; |
21 | |
22 | use RuntimeException; |
23 | use stdClass; |
24 | use Wikimedia\Rdbms\IDatabase; |
25 | |
26 | /** |
27 | * @since 1.38 |
28 | */ |
29 | interface LinkTargetLookup { |
30 | /** |
31 | * Instantiate a new LinkTarget object based on a $row from the linktarget table. |
32 | * |
33 | * Use this method when a linktarget row was already fetched from the DB via a join. |
34 | * This method just constructs a new instance and does not try fetching missing |
35 | * values from the DB again. |
36 | * |
37 | * @param stdClass $row with the following fields: |
38 | * - int lt_id |
39 | * - int lt_namespace |
40 | * - string lt_title |
41 | * @return LinkTarget |
42 | */ |
43 | public function newLinkTargetFromRow( stdClass $row ): LinkTarget; |
44 | |
45 | /** |
46 | * Find a link target by $id. |
47 | * |
48 | * @param int $linkTargetId |
49 | * @return LinkTarget|null Returns null if no link target with this $linkTargetId exists in the database. |
50 | */ |
51 | public function getLinkTargetById( int $linkTargetId ): ?LinkTarget; |
52 | |
53 | /** |
54 | * Attempt to assign an link target ID to the given $linkTarget. If it is already assigned, |
55 | * return the existing ID. |
56 | * |
57 | * @note If called within a transaction, the returned ID might become invalid |
58 | * if the transaction is rolled back, so it should not be passed outside of the |
59 | * transaction context. |
60 | * |
61 | * @param LinkTarget $linkTarget |
62 | * @param IDatabase $dbw The database connection to acquire the ID from. |
63 | * @return int linktarget ID greater then 0 |
64 | * @throws RuntimeException if no linktarget ID has been assigned to this $linkTarget |
65 | */ |
66 | public function acquireLinkTargetId( LinkTarget $linkTarget, IDatabase $dbw ): int; |
67 | |
68 | /** |
69 | * Return link target id if exists |
70 | * |
71 | * @param LinkTarget $linkTarget |
72 | * @return int|null linktarget ID greater then 0, null if not found |
73 | */ |
74 | public function getLinkTargetId( LinkTarget $linkTarget ): ?int; |
75 | |
76 | } |