MediaWiki  master
FeedUtils.php
Go to the documentation of this file.
1 <?php
24 
30 class FeedUtils {
31 
39  public static function checkPurge( $timekey, $key ) {
40  global $wgRequest, $wgUser;
41 
42  $purge = $wgRequest->getVal( 'action' ) === 'purge';
43  // Allow users with 'purge' right to clear feed caches
44  if ( $purge && $wgUser->isAllowed( 'purge' ) ) {
45  $cache = MediaWikiServices::getInstance()->getMainWANObjectCache();
46  $cache->delete( $timekey, 1 );
47  $cache->delete( $key, 1 );
48  }
49  }
50 
57  public static function checkFeedOutput( $type ) {
58  global $wgOut, $wgFeed, $wgFeedClasses;
59 
60  if ( !$wgFeed ) {
61  $wgOut->addWikiMsg( 'feed-unavailable' );
62  return false;
63  }
64 
65  if ( !isset( $wgFeedClasses[$type] ) ) {
66  $wgOut->addWikiMsg( 'feed-invalid' );
67  return false;
68  }
69 
70  return true;
71  }
72 
80  public static function formatDiff( $row ) {
81  $titleObj = Title::makeTitle( $row->rc_namespace, $row->rc_title );
82  $timestamp = wfTimestamp( TS_MW, $row->rc_timestamp );
83  $actiontext = '';
84  if ( $row->rc_type == RC_LOG ) {
85  $rcRow = (array)$row; // newFromRow() only accepts arrays for RC rows
86  $actiontext = LogFormatter::newFromRow( $rcRow )->getActionText();
87  }
88  return self::formatDiffRow( $titleObj,
89  $row->rc_last_oldid, $row->rc_this_oldid,
90  $timestamp,
91  $row->rc_deleted & Revision::DELETED_COMMENT
92  ? wfMessage( 'rev-deleted-comment' )->escaped()
93  : CommentStore::getStore()->getComment( 'rc_comment', $row )->text,
94  $actiontext
95  );
96  }
97 
109  public static function formatDiffRow( $title, $oldid, $newid, $timestamp,
110  $comment, $actiontext = ''
111  ) {
112  global $wgFeedDiffCutoff, $wgLang;
113 
114  // log entries
115  $completeText = '<p>' . implode( ' ',
116  array_filter(
117  [
118  $actiontext,
119  Linker::formatComment( $comment ) ] ) ) . "</p>\n";
120 
121  // NOTE: Check permissions for anonymous users, not current user.
122  // No "privileged" version should end up in the cache.
123  // Most feed readers will not log in anyway.
124  $anon = new User();
125  $accErrors = $title->getUserPermissionsErrors( 'read', $anon, true );
126 
127  // Can't diff special pages, unreadable pages or pages with no new revision
128  // to compare against: just return the text.
129  if ( $title->getNamespace() < 0 || $accErrors || !$newid ) {
130  return $completeText;
131  }
132 
133  if ( $oldid ) {
134  $diffText = '';
135  // Don't bother generating the diff if we won't be able to show it
136  if ( $wgFeedDiffCutoff > 0 ) {
137  $rev = Revision::newFromId( $oldid );
138 
139  if ( !$rev ) {
140  $diffText = false;
141  } else {
143  $context->setTitle( $title );
144 
145  $contentHandler = $rev->getContentHandler();
146  $de = $contentHandler->createDifferenceEngine( $context, $oldid, $newid );
147  $diffText = $de->getDiff(
148  wfMessage( 'previousrevision' )->text(), // hack
149  wfMessage( 'revisionasof',
150  $wgLang->timeanddate( $timestamp ),
151  $wgLang->date( $timestamp ),
152  $wgLang->time( $timestamp ) )->text() );
153  }
154  }
155 
156  if ( $wgFeedDiffCutoff <= 0 || ( strlen( $diffText ) > $wgFeedDiffCutoff ) ) {
157  // Omit large diffs
158  $diffText = self::getDiffLink( $title, $newid, $oldid );
159  } elseif ( $diffText === false ) {
160  // Error in diff engine, probably a missing revision
161  $diffText = "<p>Can't load revision $newid</p>";
162  } else {
163  // Diff output fine, clean up any illegal UTF-8
164  $diffText = UtfNormal\Validator::cleanUp( $diffText );
165  $diffText = self::applyDiffStyle( $diffText );
166  }
167  } else {
168  $rev = Revision::newFromId( $newid );
169  if ( $wgFeedDiffCutoff <= 0 || is_null( $rev ) ) {
170  $newContent = ContentHandler::getForTitle( $title )->makeEmptyContent();
171  } else {
172  $newContent = $rev->getContent();
173  }
174 
175  if ( $newContent instanceof TextContent ) {
176  // only textual content has a "source view".
177  $text = $newContent->getText();
178 
179  if ( $wgFeedDiffCutoff <= 0 || strlen( $text ) > $wgFeedDiffCutoff ) {
180  $html = null;
181  } else {
182  $html = nl2br( htmlspecialchars( $text ) );
183  }
184  } else {
185  // XXX: we could get an HTML representation of the content via getParserOutput, but that may
186  // contain JS magic and generally may not be suitable for inclusion in a feed.
187  // Perhaps Content should have a getDescriptiveHtml method and/or a getSourceText method.
188  // Compare also ApiFeedContributions::feedItemDesc
189  $html = null;
190  }
191 
192  if ( $html === null ) {
193  // Omit large new page diffs, T31110
194  // Also use diff link for non-textual content
195  $diffText = self::getDiffLink( $title, $newid );
196  } else {
197  $diffText = '<p><b>' . wfMessage( 'newpage' )->text() . '</b></p>' .
198  '<div>' . $html . '</div>';
199  }
200  }
201  $completeText .= $diffText;
202 
203  return $completeText;
204  }
205 
215  protected static function getDiffLink( Title $title, $newid, $oldid = null ) {
216  $queryParameters = [ 'diff' => $newid ];
217  if ( $oldid != null ) {
218  $queryParameters['oldid'] = $oldid;
219  }
220  $diffUrl = $title->getFullURL( $queryParameters );
221 
222  $diffLink = Html::element( 'a', [ 'href' => $diffUrl ],
223  wfMessage( 'showdiff' )->inContentLanguage()->text() );
224 
225  return $diffLink;
226  }
227 
236  public static function applyDiffStyle( $text ) {
237  $styles = [
238  'diff' => 'background-color: #fff; color: #222;',
239  'diff-otitle' => 'background-color: #fff; color: #222; text-align: center;',
240  'diff-ntitle' => 'background-color: #fff; color: #222; text-align: center;',
241  'diff-addedline' => 'color: #222; font-size: 88%; border-style: solid; '
242  . 'border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; '
243  . 'vertical-align: top; white-space: pre-wrap;',
244  'diff-deletedline' => 'color: #222; font-size: 88%; border-style: solid; '
245  . 'border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; '
246  . 'vertical-align: top; white-space: pre-wrap;',
247  'diff-context' => 'background-color: #f8f9fa; color: #222; font-size: 88%; '
248  . 'border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; '
249  . 'border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;',
250  'diffchange' => 'font-weight: bold; text-decoration: none;',
251  ];
252 
253  foreach ( $styles as $class => $style ) {
254  $text = preg_replace( "/(<[^>]+)class=(['\"])$class\\2([^>]*>)/",
255  "\\1style=\"$style\"\\3", $text );
256  }
257 
258  return $text;
259  }
260 
261 }
The wiki should then use memcached to cache various data To use multiple just add more items to the array To increase the weight of a make its entry a array("192.168.0.1:11211", 2))
null means default in associative array with keys and values unescaped Should be merged with default with a value of false meaning to suppress the attribute in associative array with keys and values unescaped noclasses just before the function returns a value If you return an< a > element with HTML attributes $attribs and contents $html will be returned If you return $ret will be returned and may include noclasses & $html
Definition: hooks.txt:1982
static element( $element, $attribs=[], $contents='')
Identical to rawElement(), but HTML-escapes $contents (like Xml::element()).
Definition: Html.php:232
Apache License January AND DISTRIBUTION Definitions License shall mean the terms and conditions for use
static getDiffLink(Title $title, $newid, $oldid=null)
Generates a diff link.
Definition: FeedUtils.php:215
injection txt This is an overview of how MediaWiki makes use of dependency injection The design described here grew from the discussion of RFC T384 The term dependency this means that anything an object needs to operate should be injected from the the object itself should only know narrow no concrete implementation of the logic it relies on The requirement to inject everything typically results in an architecture that based on two main types of and essentially stateless service objects that use other service objects to operate on the value objects As of the beginning MediaWiki is only starting to use the DI approach Much of the code still relies on global state or direct resulting in a highly cyclical dependency MediaWikiServices
Definition: injection.txt:23
static formatDiffRow( $title, $oldid, $newid, $timestamp, $comment, $actiontext='')
Really format a diff for the newsfeed.
Definition: FeedUtils.php:109
$wgFeed
Provide syndication feeds (RSS, Atom) for, e.g., Recentchanges, Newpages.
This list may contain false positives That usually means there is additional text with links below the first Each row contains links to the first and second as well as the first line of the second redirect text
wfTimestamp( $outputtype=TS_UNIX, $ts=0)
Get a timestamp string in one of various formats.
$wgFeedDiffCutoff
When generating Recentchanges RSS/Atom feed, diffs will not be generated for pages larger than this s...
$wgLang
Definition: Setup.php:875
either a unescaped string or a HtmlArmor object after in associative array form externallinks including delete and has completed for all link tables whether this was an auto creation use $formDescriptor instead default is conds Array Extra conditions for the No matching items in log is displayed if loglist is empty msgKey Array If you want a nice box with a set this to the key of the message First element is the message additional optional elements are parameters for the key that are processed with wfMessage() -> params() ->parseAsBlock() - offset Set to overwrite offset parameter in $wgRequest set to '' to unset offset - wrap String Wrap the message in html(usually something like "&lt
static getMain()
Get the RequestContext object associated with the main request.
static formatComment( $comment, $title=null, $local=false, $wikiId=null)
This function is called by all recent changes variants, by the page history, and by the user contribu...
Definition: Linker.php:1123
static checkPurge( $timekey, $key)
Check whether feed&#39;s cache should be cleared; for changes feeds If the feed should be purged; $timeke...
Definition: FeedUtils.php:39
$cache
Definition: mcc.php:33
static applyDiffStyle( $text)
Hacky application of diff styles for the feeds.
Definition: FeedUtils.php:236
this hook is for auditing only or null if authentication failed before getting that far or null if we can t even determine that When $user is not null
Definition: hooks.txt:780
namespace and then decline to actually register it file or subcat img or subcat $title
Definition: hooks.txt:925
getFullURL( $query='', $query2=false, $proto=PROTO_RELATIVE)
Get a real URL referring to this title, with interwiki link and fragment.
Definition: Title.php:1910
static newFromRow( $row)
Handy shortcut for constructing a formatter directly from database row.
presenting them properly to the user as errors is done by the caller return true use this to change the list i e etc $rev
Definition: hooks.txt:1766
static getForTitle(Title $title)
Returns the appropriate ContentHandler singleton for the given title.
This document is intended to provide useful advice for parties seeking to redistribute MediaWiki to end users It s targeted particularly at maintainers for Linux since it s been observed that distribution packages of MediaWiki often break We ve consistently had to recommend that users seeking support use official tarballs instead of their distribution s and this often solves whatever problem the user is having It would be nice if this could such as
Definition: distributors.txt:9
static makeTitle( $ns, $title, $fragment='', $interwiki='')
Create a new Title from a namespace index and a DB key.
Definition: Title.php:589
static formatDiff( $row)
Format a diff for the newsfeed.
Definition: FeedUtils.php:80
injection txt This is an overview of how MediaWiki makes use of dependency injection The design described here grew from the discussion of RFC T384 The term dependency this means that anything an object needs to operate should be injected from the the object itself should only know narrow no concrete implementation of the logic it relies on The requirement to inject everything typically results in an architecture that based on two main types of and essentially stateless service objects that use other service objects to operate on the value objects As of the beginning MediaWiki is only starting to use the DI approach Much of the code still relies on global state or direct resulting in a highly cyclical dependency which acts as the top level factory for services in MediaWiki which can be used to gain access to default instances of various services MediaWikiServices however also allows new services to be defined and default services to be redefined Services are defined or redefined by providing a callback the instantiator that will return a new instance of the service When it will create an instance of MediaWikiServices and populate it with the services defined in the files listed by thereby bootstrapping the DI framework Per $wgServiceWiringFiles lists includes ServiceWiring php
Definition: injection.txt:35
static getStore()
Helper functions for feeds.
Definition: FeedUtils.php:30
static checkFeedOutput( $type)
Check whether feeds can be used and that $type is a valid feed type.
Definition: FeedUtils.php:57
do that in ParserLimitReportFormat instead use this to modify the parameters of the image all existing parser cache entries will be invalid To avoid you ll need to handle that somehow(e.g. with the RejectParserCacheValue hook) because MediaWiki won 't do it for you. & $defaults also a ContextSource after deleting those rows but within the same transaction you ll probably need to make sure the header is varied on and they can depend only on the ResourceLoaderContext $context
Definition: hooks.txt:2633
if(! $wgDBerrorLogTZ) $wgRequest
Definition: Setup.php:728
$wgOut
Definition: Setup.php:880
const DELETED_COMMENT
Definition: Revision.php:47
static newFromId( $id, $flags=0)
Load a page revision from a given revision ID number.
Definition: Revision.php:118
const RC_LOG
Definition: Defines.php:144
$wgFeedClasses
Available feeds objects.