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diff --git a/www/wiki/includes/Storage/RevisionStoreRecord.php b/www/wiki/includes/Storage/RevisionStoreRecord.php
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+++ b/www/wiki/includes/Storage/RevisionStoreRecord.php
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+<?php
+/**
+ * A RevisionRecord representing an existing revision persisted in the revision table.
+ *
+ * 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\Storage;
+
+use CommentStoreComment;
+use InvalidArgumentException;
+use MediaWiki\User\UserIdentity;
+use Title;
+use User;
+use Wikimedia\Assert\Assert;
+
+/**
+ * A RevisionRecord representing an existing revision persisted in the revision table.
+ * RevisionStoreRecord has no optional fields, getters will never return null.
+ *
+ * @since 1.31
+ */
+class RevisionStoreRecord extends RevisionRecord {
+
+	/** @var bool */
+	protected $mCurrent = false;
+
+	/**
+	 * @note Avoid calling this constructor directly. Use the appropriate methods
+	 * in RevisionStore instead.
+	 *
+	 * @param Title $title The title of the page this Revision is associated with.
+	 * @param UserIdentity $user
+	 * @param CommentStoreComment $comment
+	 * @param object $row A row from the revision table. Use RevisionStore::getQueryInfo() to build
+	 *        a query that yields the required fields.
+	 * @param RevisionSlots $slots The slots of this revision.
+	 * @param bool|string $wikiId the wiki ID of the site this Revision belongs to,
+	 *        or false for the local site.
+	 */
+	function __construct(
+		Title $title,
+		UserIdentity $user,
+		CommentStoreComment $comment,
+		$row,
+		RevisionSlots $slots,
+		$wikiId = false
+	) {
+		parent::__construct( $title, $slots, $wikiId );
+		Assert::parameterType( 'object', $row, '$row' );
+
+		$this->mId = intval( $row->rev_id );
+		$this->mPageId = intval( $row->rev_page );
+		$this->mComment = $comment;
+
+		$timestamp = wfTimestamp( TS_MW, $row->rev_timestamp );
+		Assert::parameter( is_string( $timestamp ), '$row->rev_timestamp', 'must be a valid timestamp' );
+
+		$this->mUser = $user;
+		$this->mMinorEdit = boolval( $row->rev_minor_edit );
+		$this->mTimestamp = $timestamp;
+		$this->mDeleted = intval( $row->rev_deleted );
+
+		// NOTE: rev_parent_id = 0 indicates that there is no parent revision, while null
+		// indicates that the parent revision is unknown. As per MW 1.31, the database schema
+		// allows rev_parent_id to be NULL.
+		$this->mParentId = isset( $row->rev_parent_id ) ? intval( $row->rev_parent_id ) : null;
+		$this->mSize = isset( $row->rev_len ) ? intval( $row->rev_len ) : null;
+		$this->mSha1 = !empty( $row->rev_sha1 ) ? $row->rev_sha1 : null;
+
+		// NOTE: we must not call $this->mTitle->getLatestRevID() here, since the state of
+		// page_latest may be in limbo during revision creation. In that case, calling
+		// $this->mTitle->getLatestRevID() would cause a bad value to be cached in the Title
+		// object. During page creation, that bad value would be 0.
+		if ( isset( $row->page_latest ) ) {
+			$this->mCurrent = ( $row->rev_id == $row->page_latest );
+		}
+
+		// sanity check
+		if (
+			$this->mPageId && $this->mTitle->exists()
+			&& $this->mPageId !== $this->mTitle->getArticleID()
+		) {
+			throw new InvalidArgumentException(
+				'The given Title does not belong to page ID ' . $this->mPageId .
+				' but actually belongs to ' . $this->mTitle->getArticleID()
+			);
+		}
+	}
+
+	/**
+	 * MCR migration note: this replaces Revision::isCurrent
+	 *
+	 * @return bool
+	 */
+	public function isCurrent() {
+		return $this->mCurrent;
+	}
+
+	/**
+	 * MCR migration note: this replaces Revision::isDeleted
+	 *
+	 * @param int $field One of DELETED_* bitfield constants
+	 *
+	 * @return bool
+	 */
+	public function isDeleted( $field ) {
+		if ( $this->isCurrent() && $field === self::DELETED_TEXT ) {
+			// Current revisions of pages cannot have the content hidden. Skipping this
+			// check is very useful for Parser as it fetches templates using newKnownCurrent().
+			// Calling getVisibility() in that case triggers a verification database query.
+			return false; // no need to check
+		}
+
+		return parent::isDeleted( $field );
+	}
+
+	protected function userCan( $field, User $user ) {
+		if ( $this->isCurrent() && $field === self::DELETED_TEXT ) {
+			// Current revisions of pages cannot have the content hidden. Skipping this
+			// check is very useful for Parser as it fetches templates using newKnownCurrent().
+			// Calling getVisibility() in that case triggers a verification database query.
+			return true; // no need to check
+		}
+
+		return parent::userCan( $field, $user );
+	}
+
+	/**
+	 * @return int The revision id, never null.
+	 */
+	public function getId() {
+		// overwritten just to add a guarantee to the contract
+		return parent::getId();
+	}
+
+	/**
+	 * @throws RevisionAccessException if the size was unknown and could not be calculated.
+	 * @return string The nominal revision size, never null. May be computed on the fly.
+	 */
+	public function getSize() {
+		// If length is null, calculate and remember it (potentially SLOW!).
+		// This is for compatibility with old database rows that don't have the field set.
+		if ( $this->mSize === null ) {
+			$this->mSize = $this->mSlots->computeSize();
+		}
+
+		return $this->mSize;
+	}
+
+	/**
+	 * @throws RevisionAccessException if the hash was unknown and could not be calculated.
+	 * @return string The revision hash, never null. May be computed on the fly.
+	 */
+	public function getSha1() {
+		// If hash is null, calculate it and remember (potentially SLOW!)
+		// This is for compatibility with old database rows that don't have the field set.
+		if ( $this->mSha1 === null ) {
+			$this->mSha1 = $this->mSlots->computeSha1();
+		}
+
+		return $this->mSha1;
+	}
+
+	/**
+	 * @param int $audience
+	 * @param User|null $user
+	 *
+	 * @return UserIdentity The identity of the revision author, null if access is forbidden.
+	 */
+	public function getUser( $audience = self::FOR_PUBLIC, User $user = null ) {
+		// overwritten just to add a guarantee to the contract
+		return parent::getUser( $audience, $user );
+	}
+
+	/**
+	 * @param int $audience
+	 * @param User|null $user
+	 *
+	 * @return CommentStoreComment The revision comment, null if access is forbidden.
+	 */
+	public function getComment( $audience = self::FOR_PUBLIC, User $user = null ) {
+		// overwritten just to add a guarantee to the contract
+		return parent::getComment( $audience, $user );
+	}
+
+	/**
+	 * @return string timestamp, never null
+	 */
+	public function getTimestamp() {
+		// overwritten just to add a guarantee to the contract
+		return parent::getTimestamp();
+	}
+
+}