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<?php
/**
* Holders of revision list for a single page
*
* 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
*/
/**
* List for revision table items for a single page
*/
abstract class RevisionListBase extends ContextSource {
/** @var Title */
public $title;
/** @var array */
protected $ids;
/** @var ResultWrapper|bool */
protected $res;
/** @var bool|object */
protected $current;
/**
* Construct a revision list for a given title
* @param IContextSource $context
* @param Title $title
*/
function __construct( IContextSource $context, Title $title ) {
$this->setContext( $context );
$this->title = $title;
}
/**
* Select items only where the ID is any of the specified values
* @param array $ids
*/
function filterByIds( array $ids ) {
$this->ids = $ids;
}
/**
* Get the internal type name of this list. Equal to the table name.
* Override this function.
* @return null
*/
public function getType() {
return null;
}
/**
* Initialise the current iteration pointer
*/
protected function initCurrent() {
$row = $this->res->current();
if ( $row ) {
$this->current = $this->newItem( $row );
} else {
$this->current = false;
}
}
/**
* Start iteration. This must be called before current() or next().
* @return Revision First list item
*/
public function reset() {
if ( !$this->res ) {
$this->res = $this->doQuery( wfGetDB( DB_SLAVE ) );
} else {
$this->res->rewind();
}
$this->initCurrent();
return $this->current;
}
/**
* Get the current list item, or false if we are at the end
* @return Revision
*/
public function current() {
return $this->current;
}
/**
* Move the iteration pointer to the next list item, and return it.
* @return Revision
*/
public function next() {
$this->res->next();
$this->initCurrent();
return $this->current;
}
/**
* Get the number of items in the list.
* @return int
*/
public function length() {
if ( !$this->res ) {
return 0;
} else {
return $this->res->numRows();
}
}
/**
* Do the DB query to iterate through the objects.
* @param IDatabase $db DB object to use for the query
*/
abstract public function doQuery( $db );
/**
* Create an item object from a DB result row
* @param object $row
*/
abstract public function newItem( $row );
}
/**
* Abstract base class for revision items
*/
abstract class RevisionItemBase {
/** @var RevisionListBase The parent */
protected $list;
/** The database result row */
protected $row;
/**
* @param RevisionListBase $list
* @param object $row DB result row
*/
public function __construct( $list, $row ) {
$this->list = $list;
$this->row = $row;
}
/**
* Get the DB field name associated with the ID list.
* Override this function.
* @return null
*/
public function getIdField() {
return null;
}
/**
* Get the DB field name storing timestamps.
* Override this function.
* @return bool
*/
public function getTimestampField() {
return false;
}
/**
* Get the DB field name storing user ids.
* Override this function.
* @return bool
*/
public function getAuthorIdField() {
return false;
}
/**
* Get the DB field name storing user names.
* Override this function.
* @return bool
*/
public function getAuthorNameField() {
return false;
}
/**
* Get the ID, as it would appear in the ids URL parameter
* @return int
*/
public function getId() {
$field = $this->getIdField();
return $this->row->$field;
}
/**
* Get the date, formatted in user's language
* @return string
*/
public function formatDate() {
return $this->list->getLanguage()->userDate( $this->getTimestamp(),
$this->list->getUser() );
}
/**
* Get the time, formatted in user's language
* @return string
*/
public function formatTime() {
return $this->list->getLanguage()->userTime( $this->getTimestamp(),
$this->list->getUser() );
}
/**
* Get the timestamp in MW 14-char form
* @return mixed
*/
public function getTimestamp() {
$field = $this->getTimestampField();
return wfTimestamp( TS_MW, $this->row->$field );
}
/**
* Get the author user ID
* @return int
*/
public function getAuthorId() {
$field = $this->getAuthorIdField();
return intval( $this->row->$field );
}
/**
* Get the author user name
* @return string
*/
public function getAuthorName() {
$field = $this->getAuthorNameField();
return strval( $this->row->$field );
}
/**
* Returns true if the current user can view the item
*/
abstract public function canView();
/**
* Returns true if the current user can view the item text/file
*/
abstract public function canViewContent();
/**
* Get the HTML of the list item. Should be include "<li></li>" tags.
* This is used to show the list in HTML form, by the special page.
*/
abstract public function getHTML();
}
class RevisionList extends RevisionListBase {
public function getType() {
return 'revision';
}
/**
* @param IDatabase $db
* @return mixed
*/
public function doQuery( $db ) {
$conds = [ 'rev_page' => $this->title->getArticleID() ];
if ( $this->ids !== null ) {
$conds['rev_id'] = array_map( 'intval', $this->ids );
}
return $db->select(
[ 'revision', 'page', 'user' ],
array_merge( Revision::selectFields(), Revision::selectUserFields() ),
$conds,
__METHOD__,
[ 'ORDER BY' => 'rev_id DESC' ],
[
'page' => Revision::pageJoinCond(),
'user' => Revision::userJoinCond() ]
);
}
public function newItem( $row ) {
return new RevisionItem( $this, $row );
}
}
/**
* Item class for a live revision table row
*/
class RevisionItem extends RevisionItemBase {
/** @var Revision */
protected $revision;
/** @var RequestContext */
protected $context;
public function __construct( $list, $row ) {
parent::__construct( $list, $row );
$this->revision = new Revision( $row );
$this->context = $list->getContext();
}
public function getIdField() {
return 'rev_id';
}
public function getTimestampField() {
return 'rev_timestamp';
}
public function getAuthorIdField() {
return 'rev_user';
}
public function getAuthorNameField() {
return 'rev_user_text';
}
public function canView() {
return $this->revision->userCan( Revision::DELETED_RESTRICTED, $this->context->getUser() );
}
public function canViewContent() {
return $this->revision->userCan( Revision::DELETED_TEXT, $this->context->getUser() );
}
public function isDeleted() {
return $this->revision->isDeleted( Revision::DELETED_TEXT );
}
/**
* Get the HTML link to the revision text.
* @todo Essentially a copy of RevDelRevisionItem::getRevisionLink. That class
* should inherit from this one, and implement an appropriate interface instead
* of extending RevDelItem
* @return string
*/
protected function getRevisionLink() {
$date = htmlspecialchars( $this->list->getLanguage()->userTimeAndDate(
$this->revision->getTimestamp(), $this->list->getUser() ) );
if ( $this->isDeleted() && !$this->canViewContent() ) {
return $date;
}
return Linker::linkKnown(
$this->list->title,
$date,
[],
[
'oldid' => $this->revision->getId(),
'unhide' => 1
]
);
}
/**
* Get the HTML link to the diff.
* @todo Essentially a copy of RevDelRevisionItem::getDiffLink. That class
* should inherit from this one, and implement an appropriate interface instead
* of extending RevDelItem
* @return string
*/
protected function getDiffLink() {
if ( $this->isDeleted() && !$this->canViewContent() ) {
return $this->context->msg( 'diff' )->escaped();
} else {
return Linker::linkKnown(
$this->list->title,
$this->list->msg( 'diff' )->escaped(),
[],
[
'diff' => $this->revision->getId(),
'oldid' => 'prev',
'unhide' => 1
]
);
}
}
/**
* @todo Essentially a copy of RevDelRevisionItem::getHTML. That class
* should inherit from this one, and implement an appropriate interface instead
* of extending RevDelItem
* @return string
*/
public function getHTML() {
$difflink = $this->context->msg( 'parentheses' )
->rawParams( $this->getDiffLink() )->escaped();
$revlink = $this->getRevisionLink();
$userlink = Linker::revUserLink( $this->revision );
$comment = Linker::revComment( $this->revision );
if ( $this->isDeleted() ) {
$revlink = "<span class=\"history-deleted\">$revlink</span>";
}
return "<li>$difflink $revlink $userlink $comment</li>";
}
}