HistoryBlobCurStub.php
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HistoryBlobCurStub.php
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	<?php
	/**
	* Efficient concatenated text storage.
	*
	* @license GPL-2.0-or-later
	* @file
	*/

	use MediaWiki\MediaWikiServices;

	/**
	* To speed up conversion from 1.4 to 1.5 schema, text rows can refer to the
	* leftover cur table as the backend. This avoids expensively copying hundreds
	* of megabytes of data during the conversion downtime.
	*/
	class HistoryBlobCurStub {
	/** @var int */
	public $mCurId;

	/**
	* @param int $curid The cur_id pointed to
	*/
	public function __construct( $curid = 0 ) {
	$this->mCurId = $curid;
	}

	/**
	* Sets the location (cur_id) of the main object to which this object
	* points
	*
	* @param int $id
	*/
	public function setLocation( $id ) {
	$this->mCurId = $id;
	}

	/**
	* @return string\|false
	*/
	public function getText() {
	$dbr = MediaWikiServices::getInstance()->getConnectionProvider()->getReplicaDatabase();
	$row = $dbr->newSelectQueryBuilder()
	->select( [ 'cur_text' ] )
	->from( 'cur' )
	->where( [ 'cur_id' => $this->mCurId ] )
	->caller( __METHOD__ )->fetchRow();
	return $row ? $row->cur_text : false;
	}
	}

	// Blobs generated by MediaWiki < 1.5 on PHP 4 were serialized with the
	// class name coerced to lowercase. We can improve efficiency by adding
	// autoload entries for the lowercase variants of these classes (T166759).
	// The code below is never executed, but it is picked up by the AutoloadGenerator
	// parser, which scans for class_alias() calls.
	/*
	class_alias( HistoryBlobCurStub::class, 'historyblobcurstub' );
	*/