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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\Title; |
22 | |
23 | /** |
24 | * A parser that translates page titles on a foreign wiki into ForeignTitle |
25 | * objects, using information about the namespace setup on the foreign site. |
26 | */ |
27 | class NamespaceAwareForeignTitleFactory implements ForeignTitleFactory { |
28 | /** |
29 | * @var array |
30 | */ |
31 | protected $foreignNamespaces; |
32 | /** |
33 | * @var array |
34 | */ |
35 | private $foreignNamespacesFlipped; |
36 | |
37 | /** |
38 | * Normalizes an array name for $foreignNamespacesFlipped. |
39 | * @param string $name |
40 | * @return string |
41 | */ |
42 | private function normalizeNamespaceName( $name ) { |
43 | return strtolower( str_replace( ' ', '_', $name ) ); |
44 | } |
45 | |
46 | /** |
47 | * @param array|null $foreignNamespaces An array 'id' => 'name' which contains |
48 | * the complete namespace setup of the foreign wiki. Such data could be |
49 | * obtained from siteinfo/namespaces in an XML dump file, or by an action API |
50 | * query such as api.php?action=query&meta=siteinfo&siprop=namespaces. If |
51 | * this data is unavailable, use NaiveForeignTitleFactory instead. |
52 | */ |
53 | public function __construct( $foreignNamespaces ) { |
54 | $this->foreignNamespaces = $foreignNamespaces; |
55 | if ( $foreignNamespaces !== null ) { |
56 | $this->foreignNamespacesFlipped = []; |
57 | foreach ( $foreignNamespaces as $id => $name ) { |
58 | $newKey = self::normalizeNamespaceName( $name ); |
59 | $this->foreignNamespacesFlipped[$newKey] = $id; |
60 | } |
61 | } |
62 | } |
63 | |
64 | /** |
65 | * Create a ForeignTitle object. |
66 | * |
67 | * Based on the page title and optionally the namespace ID, of a page on a foreign wiki. |
68 | * These values could be, for example, the `<title>` and `<ns>` attributes found in an |
69 | * XML dump. |
70 | * |
71 | * @param string $title The page title |
72 | * @param int|null $ns The namespace ID, or null if this data is not available |
73 | * @return ForeignTitle |
74 | */ |
75 | public function createForeignTitle( $title, $ns = null ) { |
76 | // Export schema version 0.5 and earlier (MW 1.18 and earlier) does not |
77 | // contain a <ns> tag, so we need to be able to handle that case. |
78 | if ( $ns === null ) { |
79 | return self::parseTitleNoNs( $title ); |
80 | } else { |
81 | return self::parseTitleWithNs( $title, $ns ); |
82 | } |
83 | } |
84 | |
85 | /** |
86 | * Helper function to parse the title when the namespace ID is not specified. |
87 | * |
88 | * @param string $title |
89 | * @return ForeignTitle |
90 | */ |
91 | protected function parseTitleNoNs( $title ) { |
92 | $pieces = explode( ':', $title, 2 ); |
93 | $key = self::normalizeNamespaceName( $pieces[0] ); |
94 | |
95 | // Does the part before the colon match a known namespace? Check the |
96 | // foreign namespaces |
97 | $isNamespacePartValid = isset( $this->foreignNamespacesFlipped[$key] ); |
98 | |
99 | if ( count( $pieces ) === 2 && $isNamespacePartValid ) { |
100 | [ $namespaceName, $pageName ] = $pieces; |
101 | $ns = $this->foreignNamespacesFlipped[$key]; |
102 | } else { |
103 | $namespaceName = ''; |
104 | $pageName = $title; |
105 | $ns = 0; |
106 | } |
107 | |
108 | return new ForeignTitle( $ns, $namespaceName, $pageName ); |
109 | } |
110 | |
111 | /** |
112 | * Helper function to parse the title when the namespace value is known. |
113 | * |
114 | * @param string $title |
115 | * @param int $ns |
116 | * @return ForeignTitle |
117 | */ |
118 | protected function parseTitleWithNs( $title, $ns ) { |
119 | $pieces = explode( ':', $title, 2 ); |
120 | |
121 | // Is $title of the form Namespace:Title (true), or just Title (false)? |
122 | $titleIncludesNamespace = ( $ns != '0' && count( $pieces ) === 2 ); |
123 | |
124 | if ( isset( $this->foreignNamespaces[$ns] ) ) { |
125 | $namespaceName = $this->foreignNamespaces[$ns]; |
126 | } else { |
127 | // If the foreign wiki is misconfigured, XML dumps can contain a page with |
128 | // a non-zero namespace ID, but whose title doesn't contain a colon |
129 | // (T114115). In those cases, output a made-up namespace name to avoid |
130 | // collisions. The ImportTitleFactory might replace this with something |
131 | // more appropriate. |
132 | $namespaceName = $titleIncludesNamespace ? $pieces[0] : "Ns$ns"; |
133 | } |
134 | |
135 | // We assume that the portion of the page title before the colon is the |
136 | // namespace name, except in the case of namespace 0. |
137 | if ( $titleIncludesNamespace ) { |
138 | $pageName = $pieces[1]; |
139 | } else { |
140 | $pageName = $title; |
141 | } |
142 | |
143 | return new ForeignTitle( $ns, $namespaceName, $pageName ); |
144 | } |
145 | } |
146 | |
147 | /** @deprecated class alias since 1.41 */ |
148 | class_alias( NamespaceAwareForeignTitleFactory::class, 'NamespaceAwareForeignTitleFactory' ); |