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
|
<?php
/*
* Created on May 12, 2007
*
* API for MediaWiki 1.8+
*
* Copyright (C) 2006 Yuri Astrakhan <Firstname><Lastname>@gmail.com
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
* http://www.gnu.org/copyleft/gpl.html
*/
if (!defined('MEDIAWIKI')) {
// Eclipse helper - will be ignored in production
require_once ("ApiQueryBase.php");
}
/**
* A query module to list all wiki links on a given set of pages.
*
* @ingroup API
*/
class ApiQueryLinks extends ApiQueryGeneratorBase {
const LINKS = 'links';
const TEMPLATES = 'templates';
private $table, $prefix, $description;
public function __construct($query, $moduleName) {
switch ($moduleName) {
case self::LINKS :
$this->table = 'pagelinks';
$this->prefix = 'pl';
$this->description = 'link';
break;
case self::TEMPLATES :
$this->table = 'templatelinks';
$this->prefix = 'tl';
$this->description = 'template';
break;
default :
ApiBase :: dieDebug(__METHOD__, 'Unknown module name');
}
parent :: __construct($query, $moduleName, $this->prefix);
}
public function execute() {
$this->run();
}
public function executeGenerator($resultPageSet) {
$this->run($resultPageSet);
}
private function run($resultPageSet = null) {
if ($this->getPageSet()->getGoodTitleCount() == 0)
return; // nothing to do
$params = $this->extractRequestParams();
$this->addFields(array (
$this->prefix . '_from AS pl_from',
$this->prefix . '_namespace AS pl_namespace',
$this->prefix . '_title AS pl_title'
));
$this->addTables($this->table);
$this->addWhereFld($this->prefix . '_from', array_keys($this->getPageSet()->getGoodTitles()));
$this->addWhereFld($this->prefix . '_namespace', $params['namespace']);
if(!is_null($params['continue'])) {
$cont = explode('|', $params['continue']);
if(count($cont) != 3)
$this->dieUsage("Invalid continue param. You should pass the " .
"original value returned by the previous query", "_badcontinue");
$plfrom = intval($cont[0]);
$plns = intval($cont[1]);
$pltitle = $this->getDB()->strencode($this->titleToKey($cont[2]));
$this->addWhere("{$this->prefix}_from > $plfrom OR ".
"({$this->prefix}_from = $plfrom AND ".
"({$this->prefix}_namespace > $plns OR ".
"({$this->prefix}_namespace = $plns AND ".
"{$this->prefix}_title >= '$pltitle')))");
}
# Here's some MySQL craziness going on: if you use WHERE foo='bar'
# and later ORDER BY foo MySQL doesn't notice the ORDER BY is pointless
# but instead goes and filesorts, because the index for foo was used
# already. To work around this, we drop constant fields in the WHERE
# clause from the ORDER BY clause
$order = array();
if(count($this->getPageSet()->getGoodTitles()) != 1)
$order[] = "{$this->prefix}_from";
if(count($params['namespace']) != 1)
$order[] = "{$this->prefix}_namespace";
$order[] = "{$this->prefix}_title";
$this->addOption('ORDER BY', implode(", ", $order));
$this->addOption('USE INDEX', "{$this->prefix}_from");
$this->addOption('LIMIT', $params['limit'] + 1);
$db = $this->getDB();
$res = $this->select(__METHOD__);
if (is_null($resultPageSet)) {
$data = array();
$lastId = 0; // database has no ID 0
$count = 0;
while ($row = $db->fetchObject($res)) {
if(++$count > $params['limit']) {
// We've reached the one extra which shows that
// there are additional pages to be had. Stop here...
$this->setContinueEnumParameter('continue',
"{$row->pl_from}|{$row->pl_namespace}|" .
$this->keyToTitle($row->pl_title));
break;
}
if ($lastId != $row->pl_from) {
if($lastId != 0) {
$this->addPageSubItems($lastId, $data);
$data = array();
}
$lastId = $row->pl_from;
}
$vals = array();
ApiQueryBase :: addTitleInfo($vals, Title :: makeTitle($row->pl_namespace, $row->pl_title));
$data[] = $vals;
}
if($lastId != 0) {
$this->addPageSubItems($lastId, $data);
}
} else {
$titles = array();
$count = 0;
while ($row = $db->fetchObject($res)) {
if(++$count > $params['limit']) {
// We've reached the one extra which shows that
// there are additional pages to be had. Stop here...
$this->setContinueEnumParameter('continue',
"{$row->pl_from}|{$row->pl_namespace}|" .
$this->keyToTitle($row->pl_title));
break;
}
$titles[] = Title :: makeTitle($row->pl_namespace, $row->pl_title);
}
$resultPageSet->populateFromTitles($titles);
}
$db->freeResult($res);
}
public function getAllowedParams()
{
return array(
'namespace' => array(
ApiBase :: PARAM_TYPE => 'namespace',
ApiBase :: PARAM_ISMULTI => true
),
'limit' => array(
ApiBase :: PARAM_DFLT => 10,
ApiBase :: PARAM_TYPE => 'limit',
ApiBase :: PARAM_MIN => 1,
ApiBase :: PARAM_MAX => ApiBase :: LIMIT_BIG1,
ApiBase :: PARAM_MAX2 => ApiBase :: LIMIT_BIG2
),
'continue' => null,
);
}
public function getParamDescription()
{
return array(
'namespace' => "Show {$this->description}s in this namespace(s) only",
'limit' => "How many {$this->description}s to return",
'continue' => 'When more results are available, use this to continue',
);
}
public function getDescription() {
return "Returns all {$this->description}s from the given page(s)";
}
protected function getExamples() {
return array (
"Get {$this->description}s from the [[Main Page]]:",
" api.php?action=query&prop={$this->getModuleName()}&titles=Main%20Page",
"Get information about the {$this->description} pages in the [[Main Page]]:",
" api.php?action=query&generator={$this->getModuleName()}&titles=Main%20Page&prop=info",
"Get {$this->description}s from the Main Page in the User and Template namespaces:",
" api.php?action=query&prop={$this->getModuleName()}&titles=Main%20Page&{$this->prefix}namespace=2|10"
);
}
public function getVersion() {
return __CLASS__ . ': $Id: ApiQueryLinks.php 43271 2008-11-06 22:38:42Z siebrand $';
}
}
|
