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
|
<?php
/**
* Implements Special:Booksources
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
* @ingroup SpecialPage
*/
/**
* Special page outputs information on sourcing a book with a particular ISBN
* The parser creates links to this page when dealing with ISBNs in wikitext
*
* @author Rob Church <robchur@gmail.com>
* @todo Validate ISBNs using the standard check-digit method
* @ingroup SpecialPage
*/
class SpecialBookSources extends SpecialPage {
/**
* ISBN passed to the page, if any
*/
private $isbn = '';
/**
* Constructor
*/
public function __construct() {
parent::__construct( 'Booksources' );
}
/**
* Show the special page
*
* @param string $isbn ISBN passed as a subpage parameter
*/
public function execute( $isbn ) {
$this->setHeaders();
$this->outputHeader();
$this->isbn = self::cleanIsbn( $isbn ? $isbn : $this->getRequest()->getText( 'isbn' ) );
$this->getOutput()->addHTML( $this->makeForm() );
if ( strlen( $this->isbn ) > 0 ) {
if ( !self::isValidISBN( $this->isbn ) ) {
$this->getOutput()->wrapWikiMsg( "<div class=\"error\">\n$1\n</div>", 'booksources-invalid-isbn' );
}
$this->showList();
}
}
/**
* Returns whether a given ISBN (10 or 13) is valid. True indicates validity.
* @param string $isbn ISBN passed for check
* @return bool
*/
public static function isValidISBN( $isbn ) {
$isbn = self::cleanIsbn( $isbn );
$sum = 0;
if ( strlen( $isbn ) == 13 ) {
for ( $i = 0; $i < 12; $i++ ) {
if ( $i % 2 == 0 ) {
$sum += $isbn[$i];
} else {
$sum += 3 * $isbn[$i];
}
}
$check = ( 10 - ( $sum % 10 ) ) % 10;
if ( $check == $isbn[12] ) {
return true;
}
} elseif ( strlen( $isbn ) == 10 ) {
for ( $i = 0; $i < 9; $i++ ) {
$sum += $isbn[$i] * ( $i + 1 );
}
$check = $sum % 11;
if ( $check == 10 ) {
$check = "X";
}
if ( $check == $isbn[9] ) {
return true;
}
}
return false;
}
/**
* Trim ISBN and remove characters which aren't required
*
* @param string $isbn Unclean ISBN
* @return string
*/
private static function cleanIsbn( $isbn ) {
return trim( preg_replace( '![^0-9X]!', '', $isbn ) );
}
/**
* Generate a form to allow users to enter an ISBN
*
* @return string
*/
private function makeForm() {
global $wgScript;
$form = Html::openElement( 'fieldset' ) . "\n";
$form .= Html::element( 'legend', array(), $this->msg( 'booksources-search-legend' )->text() ) . "\n";
$form .= Html::openElement( 'form', array( 'method' => 'get', 'action' => $wgScript ) ) . "\n";
$form .= Html::hidden( 'title', $this->getTitle()->getPrefixedText() ) . "\n";
$form .= '<p>' . Xml::inputLabel( $this->msg( 'booksources-isbn' )->text(), 'isbn', 'isbn', 20, $this->isbn, array( 'autofocus' => true ) );
$form .= ' ' . Xml::submitButton( $this->msg( 'booksources-go' )->text() ) . "</p>\n";
$form .= Html::closeElement( 'form' ) . "\n";
$form .= Html::closeElement( 'fieldset' ) . "\n";
return $form;
}
/**
* Determine where to get the list of book sources from,
* format and output them
*
* @throws MWException
* @return string
*/
private function showList() {
global $wgContLang;
# Hook to allow extensions to insert additional HTML,
# e.g. for API-interacting plugins and so on
wfRunHooks( 'BookInformation', array( $this->isbn, $this->getOutput() ) );
# Check for a local page such as Project:Book_sources and use that if available
$page = $this->msg( 'booksources' )->inContentLanguage()->text();
$title = Title::makeTitleSafe( NS_PROJECT, $page ); # Show list in content language
if ( is_object( $title ) && $title->exists() ) {
$rev = Revision::newFromTitle( $title, false, Revision::READ_NORMAL );
$content = $rev->getContent();
if ( $content instanceof TextContent ) {
//XXX: in the future, this could be stored as structured data, defining a list of book sources
$text = $content->getNativeData();
$this->getOutput()->addWikiText( str_replace( 'MAGICNUMBER', $this->isbn, $text ) );
return true;
} else {
throw new MWException( "Unexpected content type for book sources: " . $content->getModel() );
}
}
# Fall back to the defaults given in the language file
$this->getOutput()->addWikiMsg( 'booksources-text' );
$this->getOutput()->addHTML( '<ul>' );
$items = $wgContLang->getBookstoreList();
foreach ( $items as $label => $url ) {
$this->getOutput()->addHTML( $this->makeListItem( $label, $url ) );
}
$this->getOutput()->addHTML( '</ul>' );
return true;
}
/**
* Format a book source list item
*
* @param string $label Book source label
* @param string $url Book source URL
* @return string
*/
private function makeListItem( $label, $url ) {
$url = str_replace( '$1', $this->isbn, $url );
return Html::rawElement( 'li', array(),
Html::element( 'a', array( 'href' => $url, 'class' => 'external' ), $label ) );
}
protected function getGroupName() {
return 'other';
}
}
|
