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1 | <?php |
2 | /** |
3 | * Holders of revision list for a single page |
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 | * http://www.gnu.org/copyleft/gpl.html |
19 | * |
20 | * @file |
21 | */ |
22 | |
23 | namespace MediaWiki\RevisionList; |
24 | |
25 | use Iterator; |
26 | use MediaWiki\Context\ContextSource; |
27 | use MediaWiki\Context\IContextSource; |
28 | use MediaWiki\Debug\DeprecationHelper; |
29 | use MediaWiki\MediaWikiServices; |
30 | use MediaWiki\Page\PageIdentity; |
31 | use MediaWiki\Title\Title; |
32 | use stdClass; |
33 | use Wikimedia\Rdbms\IReadableDatabase; |
34 | use Wikimedia\Rdbms\IResultWrapper; |
35 | |
36 | /** |
37 | * List for revision table items for a single page |
38 | */ |
39 | abstract class RevisionListBase extends ContextSource implements Iterator { |
40 | use DeprecationHelper; |
41 | |
42 | /** @var PageIdentity */ |
43 | protected $page; |
44 | |
45 | /** @var int[]|null */ |
46 | protected $ids; |
47 | |
48 | /** @var IResultWrapper|false */ |
49 | protected $res; |
50 | |
51 | /** @var RevisionItemBase|false */ |
52 | protected $current; |
53 | |
54 | /** |
55 | * Construct a revision list for a given page identity |
56 | * @param IContextSource $context |
57 | * @param PageIdentity $page |
58 | */ |
59 | public function __construct( IContextSource $context, PageIdentity $page ) { |
60 | $this->setContext( $context ); |
61 | $this->page = $page; |
62 | |
63 | $this->deprecatePublicPropertyFallback( |
64 | 'title', |
65 | '1.37', |
66 | function (): Title { |
67 | return Title::newFromPageIdentity( $this->page ); |
68 | }, |
69 | function ( PageIdentity $page ) { |
70 | $this->page = $page; |
71 | } |
72 | ); |
73 | } |
74 | |
75 | public function getPage(): PageIdentity { |
76 | return $this->page; |
77 | } |
78 | |
79 | /** |
80 | * @internal for use by RevDelItems |
81 | * @return string |
82 | */ |
83 | public function getPageName(): string { |
84 | return Title::newFromPageIdentity( $this->page )->getPrefixedText(); |
85 | } |
86 | |
87 | /** |
88 | * Select items only where the ID is any of the specified values |
89 | * @param int[] $ids |
90 | */ |
91 | public function filterByIds( array $ids ) { |
92 | $this->ids = $ids; |
93 | } |
94 | |
95 | /** |
96 | * Get the internal type name of this list. Equal to the table name. |
97 | * Override this function. |
98 | * @return string|null |
99 | */ |
100 | public function getType() { |
101 | return null; |
102 | } |
103 | |
104 | /** |
105 | * Initialise the current iteration pointer |
106 | */ |
107 | protected function initCurrent() { |
108 | $row = $this->res->current(); |
109 | if ( $row ) { |
110 | $this->current = $this->newItem( $row ); |
111 | } else { |
112 | $this->current = false; |
113 | } |
114 | } |
115 | |
116 | /** |
117 | * Start iteration. This must be called before current() or next(). |
118 | * @return RevisionItemBase First list item |
119 | */ |
120 | public function reset() { |
121 | if ( !$this->res ) { |
122 | $this->res = $this->doQuery( |
123 | MediaWikiServices::getInstance()->getConnectionProvider()->getReplicaDatabase() |
124 | ); |
125 | } else { |
126 | $this->res->rewind(); |
127 | } |
128 | $this->initCurrent(); |
129 | return $this->current; |
130 | } |
131 | |
132 | public function rewind(): void { |
133 | $this->reset(); |
134 | } |
135 | |
136 | /** |
137 | * Get the current list item, or false if we are at the end |
138 | * @return RevisionItemBase|false |
139 | */ |
140 | #[\ReturnTypeWillChange] |
141 | public function current() { |
142 | return $this->current; |
143 | } |
144 | |
145 | /** |
146 | * Move the iteration pointer to the next list item, and return it. |
147 | * @return RevisionItemBase |
148 | * @suppress PhanParamSignatureMismatchInternal |
149 | */ |
150 | #[\ReturnTypeWillChange] |
151 | public function next() { |
152 | $this->res->next(); |
153 | $this->initCurrent(); |
154 | return $this->current; |
155 | } |
156 | |
157 | public function key(): int { |
158 | return $this->res ? $this->res->key() : 0; |
159 | } |
160 | |
161 | public function valid(): bool { |
162 | return $this->res && $this->res->valid(); |
163 | } |
164 | |
165 | /** |
166 | * Get the number of items in the list. |
167 | * @return int |
168 | */ |
169 | public function length() { |
170 | if ( !$this->res ) { |
171 | return 0; |
172 | } else { |
173 | return $this->res->numRows(); |
174 | } |
175 | } |
176 | |
177 | /** |
178 | * Do the DB query to iterate through the objects. |
179 | * @param IReadableDatabase $db DB object to use for the query |
180 | * @return IResultWrapper |
181 | */ |
182 | abstract public function doQuery( $db ); |
183 | |
184 | /** |
185 | * Create an item object from a DB result row |
186 | * @param stdClass $row |
187 | * @return RevisionItemBase |
188 | */ |
189 | abstract public function newItem( $row ); |
190 | } |
191 | /** @deprecated class alias since 1.43 */ |
192 | class_alias( RevisionListBase::class, 'RevisionListBase' ); |