summaryrefslogtreecommitdiff
path: root/maintenance/dumpInterwiki.php
blob: 4a4b67912aca41b8f680276600ce956cf1844b64 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
<?php
/**
 * Build constant slightly compact database of interwiki prefixes
 * Wikimedia specific!
 *
 * @file
 * @todo document
 * @ingroup Maintenance
 * @ingroup Wikimedia
 */

/**
 * @todo document
 * @ingroup Maintenance
 */
class Site {
	var $suffix, $lateral, $url;

	function __construct( $s, $l, $u ) {
		$this->suffix = $s;
		$this->lateral = $l;
		$this->url = $u;
	}

	function getURL( $lang ) {
		$xlang = str_replace( '_', '-', $lang );
		return "http://$xlang.{$this->url}/wiki/\$1";
	}
}

require_once( dirname( __FILE__ ) . '/Maintenance.php' );

class DumpInterwiki extends Maintenance {

	public function __construct() {
		parent::__construct();
		$this->mDescription = "Build constant slightly compact database of interwiki prefixes.";
		$this->addOption( 'langlist', 'File with one language code per line', false, true );
		$this->addOption( 'dblist', 'File with one db per line', false, true );
		$this->addOption( 'specialdbs', "File with one 'special' db per line", false, true );
		$this->addOption( 'o', 'Cdb output file', false, true );
	}

	function execute() {
		# List of language prefixes likely to be found in multi-language sites
		$this->langlist = array_map( "trim", file( $this->getOption( 'langlist', "/home/wikipedia/common/langlist" ) ) );

		# List of all database names
		$this->dblist = array_map( "trim", file( $this->getOption( 'dblist', "/home/wikipedia/common/all.dblist" ) ) );

		# Special-case databases
		$this->specials = array_flip(	array_map( "trim", file( $this->getOption( 'specialdbs', "/home/wikipedia/common/special.dblist" ) ) ) );

		if ( $this->hasOption( 'o' ) ) {
			$this->dbFile = CdbWriter::open( $this->getOption( 'o' ) ) ;
		} else {
			$this->dbFile = false;
		}

		$this->getRebuildInterwikiDump();
	}

	function getRebuildInterwikiDump() {
		global $wgContLang;

		# Multi-language sites
		# db suffix => db suffix, iw prefix, hostname
		$sites = array(
			'wiki' => new Site( 'wiki', 'w', 'wikipedia.org' ),
			'wiktionary' => new Site( 'wiktionary', 'wikt', 'wiktionary.org' ),
			'wikiquote' => new Site( 'wikiquote', 'q', 'wikiquote.org' ),
			'wikibooks' => new Site( 'wikibooks', 'b', 'wikibooks.org' ),
			'wikinews' => new Site( 'wikinews', 'n', 'wikinews.org' ),
			'wikisource' => new Site( 'wikisource', 's', 'wikisource.org' ),
			'wikimedia' => new Site( 'wikimedia', 'chapter', 'wikimedia.org' ),
			'wikiversity' => new Site( 'wikiversity', 'v', 'wikiversity.org' ),
		);

		# Extra interwiki links that can't be in the intermap for some reason
		$extraLinks = array(
			array( 'm', 'http://meta.wikimedia.org/wiki/$1', 1 ),
			array( 'meta', 'http://meta.wikimedia.org/wiki/$1', 1 ),
			array( 'sep11', 'http://sep11.wikipedia.org/wiki/$1', 1 ),
		);

		# Language aliases, usually configured as redirects to the real wiki in apache
		# Interlanguage links are made directly to the real wiki
		# Something horrible happens if you forget to list an alias here, I can't
		#   remember what
		$this->languageAliases = array(
			'zh-cn' => 'zh',
			'zh-tw' => 'zh',
			'dk' => 'da',
			'nb' => 'no',
		);

		# Special case prefix rewrites, for the benefit of Swedish which uses s:t
		# as an abbreviation for saint
		$this->prefixRewrites = array(
			'svwiki' => array( 's' => 'src' ),
		);

		# Construct a list of reserved prefixes
		$reserved = array();
		foreach ( $this->langlist as $lang ) {
			$reserved[$lang] = 1;
		}
		foreach ( $this->languageAliases as $alias => $lang ) {
			$reserved[$alias] = 1;
		}
		foreach ( $sites as $site ) {
			$reserved[$site->lateral] = 1;
		}

		# Extract the intermap from meta
		$intermap = Http::get( 'http://meta.wikimedia.org/w/index.php?title=Interwiki_map&action=raw', 30 );
		$lines = array_map( 'trim', explode( "\n", trim( $intermap ) ) );

		if ( !$lines || count( $lines ) < 2 ) {
			$this->error( "m:Interwiki_map not found", true );
		}

		# Global iterwiki map
		foreach ( $lines as $line ) {
			if ( preg_match( '/^\|\s*(.*?)\s*\|\|\s*(.*?)\s*$/', $line, $matches ) ) {
				$prefix = $wgContLang->lc( $matches[1] );
				$prefix = str_replace( ' ', '_', $prefix );

				$url = $matches[2];
				if ( preg_match( '/(wikipedia|wiktionary|wikisource|wikiquote|wikibooks|wikimedia)\.org/', $url ) ) {
					$local = 1;
				} else {
					$local = 0;
				}

				if ( empty( $reserved[$prefix] ) ) {
					$imap  = array( "iw_prefix" => $prefix, "iw_url" => $url, "iw_local" => $local );
					$this->makeLink ( $imap, "__global" );
				}
			}
		}

		# Exclude Wikipedia for Wikipedia
		$this->makeLink ( array ( 'iw_prefix' => 'wikipedia', 'is_url' => null ), "_wiki" );

		# Multilanguage sites
		foreach ( $sites as $site ) {
			$this->makeLanguageLinks ( $site, "_" . $site->suffix );
		}

		foreach ( $this->dblist as $db ) {
			if ( isset( $this->specials[$db] ) ) {
				# Special wiki
				# Has interwiki links and interlanguage links to wikipedia

				$this->makeLink( array( 'iw_prefix' => $db, 'iw_url' => "wiki" ), "__sites" );
				# Links to multilanguage sites
				foreach ( $sites as $targetSite ) {
					$this->makeLink( array( 'iw_prefix' => $targetSite->lateral,
						'iw_url' => $targetSite->getURL( 'en' ),
						'iw_local' => 1 ), $db );
				}
			} else {
				# Find out which site this DB belongs to
				$site = false;
				foreach ( $sites as $candidateSite ) {
					$suffix = $candidateSite->suffix;
					if ( preg_match( "/(.*)$suffix$/", $db, $matches ) ) {
						$site = $candidateSite;
						break;
					}
				}
				$this->makeLink( array( 'iw_prefix' => $db, 'iw_url' => $site->suffix ), "__sites" );
				if ( !$site ) {
					$this->error( "Invalid database $db\n" );
					continue;
				}
				$lang = $matches[1];

				# Lateral links
				foreach ( $sites as $targetSite ) {
					if ( $targetSite->suffix != $site->suffix ) {
						$this->makeLink( array( 'iw_prefix' => $targetSite->lateral,
							'iw_url' => $targetSite->getURL( $lang ),
							'iw_local' => 1 ), $db );
					}
				}

				if ( $site->suffix == "wiki" ) {
					$this->makeLink( array( 'iw_prefix' => 'w',
						'iw_url' => "http://en.wikipedia.org/wiki/$1",
						'iw_local' => 1 ), $db );
				}

			}
		}
		foreach ( $extraLinks as $link ) {
			$this->makeLink( $link, "__global" );
		}
	}

	# ------------------------------------------------------------------------------------------

	# Executes part of an INSERT statement, corresponding to all interlanguage links to a particular site
	function makeLanguageLinks( &$site, $source ) {
		# Actual languages with their own databases
		foreach ( $this->langlist as $targetLang ) {
			$this->makeLink( array( $targetLang, $site->getURL( $targetLang ), 1 ), $source );
		}

		# Language aliases
		foreach ( $this->languageAliases as $alias => $lang ) {
			$this->makeLink( array( $alias, $site->getURL( $lang ), 1 ), $source );
		}
	}

	function makeLink( $entry, $source ) {
		if ( isset( $this->prefixRewrites[$source] ) && isset( $this->prefixRewrites[$source][$entry[0]] ) )
			$entry[0] = $this->prefixRewrites[$source][$entry[0]];

		if ( !array_key_exists( "iw_prefix", $entry ) ) {
			$entry = array( "iw_prefix" => $entry[0], "iw_url" => $entry[1], "iw_local" => $entry[2] );
		}
		if ( array_key_exists( $source, $this->prefixRewrites ) &&
				array_key_exists( $entry['iw_prefix'], $this->prefixRewrites[$source] ) ) {
			$entry['iw_prefix'] = $this->prefixRewrites[$source][$entry['iw_prefix']];
		}

		if ( $this->dbFile ) {
			$this->dbFile->set( "{$source}:{$entry['iw_prefix']}", trim( "{$entry['iw_local']} {$entry['iw_url']}" ) );
		} else {
			$this->output( "{$source}:{$entry['iw_prefix']} {$entry['iw_url']} {$entry['iw_local']}\n" );
		}
	}
}

$maintClass = "DumpInterwiki";
require_once( RUN_MAINTENANCE_IF_MAIN );