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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
*/
namespace MediaWiki\RevisionList;
use Iterator;
use MediaWiki\Context\ContextSource;
use MediaWiki\Context\IContextSource;
use MediaWiki\Debug\DeprecationHelper;
use MediaWiki\MediaWikiServices;
use MediaWiki\Page\PageIdentity;
use MediaWiki\Title\Title;
use stdClass;
use Wikimedia\Rdbms\IReadableDatabase;
use Wikimedia\Rdbms\IResultWrapper;
/**
* List for revision table items for a single page
*/
abstract class RevisionListBase extends ContextSource implements Iterator {
use DeprecationHelper;
/** @var PageIdentity */
protected $page;
/** @var int[]|null */
protected $ids;
/** @var IResultWrapper|false */
protected $res;
/** @var RevisionItemBase|false */
protected $current;
/**
* Construct a revision list for a given page identity
* @param IContextSource $context
* @param PageIdentity $page
*/
public function __construct( IContextSource $context, PageIdentity $page ) {
$this->setContext( $context );
$this->page = $page;
$this->deprecatePublicPropertyFallback(
'title',
'1.37',
function (): Title {
return Title::newFromPageIdentity( $this->page );
},
function ( PageIdentity $page ) {
$this->page = $page;
}
);
}
public function getPage(): PageIdentity {
return $this->page;
}
/**
* @internal for use by RevDelItems
* @return string
*/
public function getPageName(): string {
return Title::newFromPageIdentity( $this->page )->getPrefixedText();
}
/**
* Select items only where the ID is any of the specified values
* @param int[] $ids
*/
public function filterByIds( array $ids ) {
$this->ids = $ids;
}
/**
* Get the internal type name of this list. Equal to the table name.
* Override this function.
* @return string|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 {
$this->current = false;
}
}
/**
* Start iteration. This must be called before current() or next().
* @return RevisionItemBase First list item
*/
public function reset() {
if ( !$this->res ) {
$this->res = $this->doQuery(
MediaWikiServices::getInstance()->getConnectionProvider()->getReplicaDatabase()
);
} else {
$this->res->rewind();
}
$this->initCurrent();
return $this->current;
}
public function rewind(): void {
$this->reset();
}
/**
* Get the current list item, or false if we are at the end
* @return RevisionItemBase|false
*/
#[\ReturnTypeWillChange]
public function current() {
return $this->current;
}
/**
* Move the iteration pointer to the next list item, and return it.
* @return RevisionItemBase
* @suppress PhanParamSignatureMismatchInternal
*/
#[\ReturnTypeWillChange]
public function next() {
$this->res->next();
$this->initCurrent();
return $this->current;
}
public function key(): int {
return $this->res ? $this->res->key() : 0;
}
public function valid(): bool {
return $this->res && $this->res->valid();
}
/**
* Get the number of items in the list.
* @return int
*/
public function length() {
if ( !$this->res ) {
return 0;
} else {
return $this->res->numRows();
}
}
/**
* Do the DB query to iterate through the objects.
* @param IReadableDatabase $db DB object to use for the query
* @return IResultWrapper
*/
abstract public function doQuery( $db );
/**
* Create an item object from a DB result row
* @param stdClass $row
* @return RevisionItemBase
*/
abstract public function newItem( $row );
}
/** @deprecated class alias since 1.43 */
class_alias( RevisionListBase::class, 'RevisionListBase' );