/**
 * Represents a title within MediaWiki.
 * Optionally may contain an interwiki designation or namespace.
 * @note This class can fetch various kinds of data from the database;
 *       however, it does so inefficiently.
 * @note Consider using a TitleValue object instead. TitleValue is more lightweight
 *       and does not rely on global state or the database.
 */
public class XomwTitle { // implements LinkTarget, IDBAccessObject
//	/** @var MapCacheLRU|null */
//	private static $titleCache = null;
//
//	/**
//	 * Title::newFromText maintains a cache to avoid expensive re-normalization of
//	 * commonly used titles. On a batch operation this can become a memory leak
//	 * if not bounded. After hitting this many titles reset the cache.
//	 */
//	const CACHE_MAX = 1000;
//
//	/**
//	 * Used to be GAID_FOR_UPDATE define. Used with getArticleID() and friends
//	 * to use the master DB
//	 */
//	const GAID_FOR_UPDATE = 1;
//
//	/**
//	 * Flag for use with factory methods like newFromLinkTarget() that have
//	 * a $forceClone parameter. If set, the method must return a new instance.
//	 * Without this flag, some factory methods may return existing instances.
//	 *
//	 * @since 1.33
//	 */
//	const NEW_CLONE = 'clone';
//
//	/**
//	 * @name Private member variables
//	 * Please use the accessor functions instead.
//	 * @private
//	 */
//	// @{
//
//	/** @var string Text form (spaces not underscores) of the main part */
//	public $mTextform = '';
//
//	/** @var string URL-encoded form of the main part */
//	public $mUrlform = '';
//
//	/** @var string Main part with underscores */
//	public $mDbkeyform = '';
//
//	/** @var string Database key with the initial letter in the case specified by the user */
//	protected $mUserCaseDBKey;
//
//	/** @var int Namespace index, i.e. one of the NS_xxxx constants */
//	public $mNamespace = NS_MAIN;
//
//	/** @var string Interwiki prefix */
//	public $mInterwiki = '';
//
//	/** @var bool Was this Title created from a string with a local interwiki prefix? */
//	private $mLocalInterwiki = false;
//
//	/** @var string Title fragment (i.e. the bit after the #) */
//	public $mFragment = '';
//
//	/** @var int Article ID, fetched from the link cache on demand */
//	public $mArticleID = -1;
//
//	/** @var bool|int ID of most recent revision */
//	protected $mLatestID = false;
//
//	/**
//	 * @var bool|string ID of the page's content model, i.e. one of the
//	 *   CONTENT_MODEL_XXX constants
//	 */
//	private $mContentModel = false;
//
//	/**
//	 * @var bool If a content model was forced via setContentModel()
//	 *   this will be true to avoid having other code paths reset it
//	 */
//	private $mForcedContentModel = false;
//
//	/** @var int Estimated number of revisions; null of not loaded */
//	private $mEstimateRevisions;
//
//	/** @var array Array of groups allowed to edit this article */
//	public $mRestrictions = [];
//
//	/**
//	 * @var string|bool Comma-separated set of permission keys
//	 * indicating who can move or edit the page from the page table, (pre 1.10) rows.
//	 * Edit and move sections are separated by a colon
//	 * Example: "edit=autoconfirmed,sysop:move=sysop"
//	 */
//	protected $mOldRestrictions = false;
//
//	/** @var bool Cascade restrictions on this page to included templates and images? */
//	public $mCascadeRestriction;
//
//	/** Caching the results of getCascadeProtectionSources */
//	public $mCascadingRestrictions;
//
//	/** @var array When do the restrictions on this page expire? */
//	protected $mRestrictionsExpiry = [];
//
//	/** @var bool Are cascading restrictions in effect on this page? */
//	protected $mHasCascadingRestrictions;
//
//	/** @var array Where are the cascading restrictions coming from on this page? */
//	public $mCascadeSources;
//
//	/** @var bool Boolean for initialisation on demand */
//	public $mRestrictionsLoaded = false;
//
//	/**
//	 * Text form including namespace/interwiki, initialised on demand
//	 *
//	 * Only public to share cache with TitleFormatter
//	 *
//	 * @private
//	 * @var string|null
//	 */
//	public $prefixedText = null;
//
//	/** @var mixed Cached value for getTitleProtection (create protection) */
//	public $mTitleProtection;
//
//	/**
//	 * @var int Namespace index when there is no namespace. Don't change the
//	 *   following default, NS_MAIN is hardcoded in several places. See T2696.
//	 *   Zero except in {{transclusion}} tags.
//	 */
//	public $mDefaultNamespace = NS_MAIN;
//
//	/** @var int The page length, 0 for special pages */
//	protected $mLength = -1;
//
//	/** @var null Is the article at this title a redirect? */
//	public $mRedirect = null;
//
//	/** @var array Associative array of user ID -> timestamp/false */
//	private $mNotificationTimestamp = [];
//
//	/** @var bool Whether a page has any subpages */
//	private $mHasSubpages;
//
//	/** @var bool The (string) language code of the page's language and content code. */
//	private $mPageLanguage = false;
//
//	/** @var string|bool|null The page language code from the database, null if not saved in
//	 * the database or false if not loaded, yet. */
//	private $mDbPageLanguage = false;
//
//	/** @var TitleValue|null A corresponding TitleValue object */
//	private $mTitleValue = null;
//
//	/** @var bool|null Would deleting this page be a big deletion? */
//	private $mIsBigDeletion = null;
//	// @}
//
//	/**
//	 * B/C kludge: provide a TitleParser for use by Title.
//	 * Ideally, Title would have no methods that need this.
//	 * Avoid usage of this singleton by using TitleValue
//	 * and the associated services when possible.
//	 *
//	 * @return TitleFormatter
//	 */
//	private static function getTitleFormatter() {
//		return MediaWikiServices::getInstance()->getTitleFormatter();
//	}
//
//	/**
//	 * B/C kludge: provide an InterwikiLookup for use by Title.
//	 * Ideally, Title would have no methods that need this.
//	 * Avoid usage of this singleton by using TitleValue
//	 * and the associated services when possible.
//	 *
//	 * @return InterwikiLookup
//	 */
//	private static function getInterwikiLookup() {
//		return MediaWikiServices::getInstance()->getInterwikiLookup();
//	}
//
//	/**
//	 * @protected
//	 */
//	function __construct() {
//	}
//
//	/**
//	 * Create a new Title from a prefixed DB key
//	 *
//	 * @param string $key The database key, which has underscores
//	 * 	instead of spaces, possibly including namespace and
//	 * 	interwiki prefixes
//	 * @return Title|null Title, or null on an error
//	 */
//	public static function newFromDBkey( $key ) {
//		$t = new self();
//		$t->mDbkeyform = $key;
//
//		try {
//			$t->secureAndSplit();
//			return $t;
//		} catch ( MalformedTitleException $ex ) {
//			return null;
//		}
//	}
//
//	/**
//	 * Returns a Title given a TitleValue.
//	 * If the given TitleValue is already a Title instance, that instance is returned,
//	 * unless $forceClone is "clone". If $forceClone is "clone" and the given TitleValue
//	 * is already a Title instance, that instance is copied using the clone operator.
//	 *
//	 * @param TitleValue $titleValue Assumed to be safe.
//	 * @param string $forceClone set to NEW_CLONE to ensure a fresh instance is returned.
//	 *
//	 * @return Title
//	 */
//	public static function newFromTitleValue( TitleValue $titleValue, $forceClone = '' ) {
//		return self::newFromLinkTarget( $titleValue, $forceClone );
//	}
//
//	/**
//	 * Returns a Title given a LinkTarget.
//	 * If the given LinkTarget is already a Title instance, that instance is returned,
//	 * unless $forceClone is "clone". If $forceClone is "clone" and the given LinkTarget
//	 * is already a Title instance, that instance is copied using the clone operator.
//	 *
//	 * @param LinkTarget $linkTarget Assumed to be safe.
//	 * @param string $forceClone set to NEW_CLONE to ensure a fresh instance is returned.
//	 *
//	 * @return Title
//	 */
//	public static function newFromLinkTarget( LinkTarget $linkTarget, $forceClone = '' ) {
//		if ( $linkTarget instanceof Title ) {
//			// Special case if it's already a Title object
//			if ( $forceClone === self::NEW_CLONE ) {
//				return clone $linkTarget;
//			} else {
//				return $linkTarget;
//			}
//		}
//		return self::makeTitle(
//			$linkTarget->getNamespace(),
//			$linkTarget->getText(),
//			$linkTarget->getFragment(),
//			$linkTarget->getInterwiki()
//		);
//	}
//
//	/**
//	 * Create a new Title from text, such as what one would find in a link. De-
//	 * codes any HTML entities in the text.
//	 *
//	 * Title objects returned by this method are guaranteed to be valid, and
//	 * thus return true from the isValid() method.
//	 *
//	 * @note The Title instance returned by this method is not guaranteed to be a fresh instance.
//	 * It may instead be a cached instance created previously, with references to it remaining
//	 * elsewhere.
//	 *
//	 * @param string|int|null $text The link text; spaces, prefixes, and an
//	 *   initial ':' indicating the main namespace are accepted.
//	 * @param int $defaultNamespace The namespace to use if none is specified
//	 *   by a prefix.  If you want to force a specific namespace even if
//	 *   $text might begin with a namespace prefix, use makeTitle() or
//	 *   makeTitleSafe().
//	 * @throws InvalidArgumentException
//	 * @return Title|null Title or null on an error.
//	 */
//	public static function newFromText( $text, $defaultNamespace = NS_MAIN ) {
//		// DWIM: Integers can be passed in here when page titles are used as array keys.
//		if ( $text !== null && !is_string( $text ) && !is_int( $text ) ) {
//			throw new InvalidArgumentException( '$text must be a string.' );
//		}
//		if ( $text === null ) {
//			return null;
//		}
//
//		try {
//			return self::newFromTextThrow( (string)$text, $defaultNamespace );
//		} catch ( MalformedTitleException $ex ) {
//			return null;
//		}
//	}
//
//	/**
//	 * Like Title::newFromText(), but throws MalformedTitleException when the title is invalid,
//	 * rather than returning null.
//	 *
//	 * The exception subclasses encode detailed information about why the title is invalid.
//	 *
//	 * Title objects returned by this method are guaranteed to be valid, and
//	 * thus return true from the isValid() method.
//	 *
//	 * @note The Title instance returned by this method is not guaranteed to be a fresh instance.
//	 * It may instead be a cached instance created previously, with references to it remaining
//	 * elsewhere.
//	 *
//	 * @see Title::newFromText
//	 *
//	 * @since 1.25
//	 * @param string $text Title text to check
//	 * @param int $defaultNamespace
//	 * @throws MalformedTitleException If the title is invalid
//	 * @return Title
//	 */
//	public static function newFromTextThrow( $text, $defaultNamespace = NS_MAIN ) {
//		if ( is_object( $text ) ) {
//			throw new MWException( '$text must be a string, given an object' );
//		} elseif ( $text === null ) {
//			// Legacy code relies on MalformedTitleException being thrown in this case
//			// (happens when URL with no title in it is parsed). TODO fix
//			throw new MalformedTitleException( 'title-invalid-empty' );
//		}
//
//		$titleCache = self::getTitleCache();
//
//		// Wiki pages often contain multiple links to the same page.
//		// Title normalization and parsing can become expensive on pages with many
//		// links, so we can save a little time by caching them.
//		// In theory these are value objects and won't get changed...
//		if ( $defaultNamespace == NS_MAIN ) {
//			$t = $titleCache->get( $text );
//			if ( $t ) {
//				return $t;
//			}
//		}
//
//		// Convert things like é ā or 〗 into normalized (T16952) text
//		$filteredText = Sanitizer::decodeCharReferencesAndNormalize( $text );
//
//		$t = new Title();
//		$t->mDbkeyform = strtr( $filteredText, ' ', '_' );
//		$t->mDefaultNamespace = (int)$defaultNamespace;
//
//		$t->secureAndSplit();
//		if ( $defaultNamespace == NS_MAIN ) {
//			$titleCache->set( $text, $t );
//		}
//		return $t;
//	}
//
//	/**
//	 * THIS IS NOT THE FUNCTION YOU WANT. Use Title::newFromText().
//	 *
//	 * Example of wrong and broken code:
//	 * $title = Title::newFromURL( $wgRequest->getVal( 'title' ) );
//	 *
//	 * Example of right code:
//	 * $title = Title::newFromText( $wgRequest->getVal( 'title' ) );
//	 *
//	 * Create a new Title from URL-encoded text. Ensures that
//	 * the given title's length does not exceed the maximum.
//	 *
//	 * @param string $url The title, as might be taken from a URL
//	 * @return Title|null The new object, or null on an error
//	 */
//	public static function newFromURL( $url ) {
//		$t = new Title();
//
//		# For compatibility with old buggy URLs. "+" is usually not valid in titles,
//		# but some URLs used it as a space replacement and they still come
//		# from some external search tools.
//		if ( strpos( self::legalChars(), '+' ) === false ) {
//			$url = strtr( $url, '+', ' ' );
//		}
//
//		$t->mDbkeyform = strtr( $url, ' ', '_' );
//
//		try {
//			$t->secureAndSplit();
//			return $t;
//		} catch ( MalformedTitleException $ex ) {
//			return null;
//		}
//	}
//
//	/**
//	 * @return MapCacheLRU
//	 */
//	private static function getTitleCache() {
//		if ( self::$titleCache === null ) {
//			self::$titleCache = new MapCacheLRU( self::CACHE_MAX );
//		}
//		return self::$titleCache;
//	}
//
//	/**
//	 * Returns a list of fields that are to be selected for initializing Title
//	 * objects or LinkCache entries. Uses $wgContentHandlerUseDB to determine
//	 * whether to include page_content_model.
//	 *
//	 * @return array
//	 */
//	protected static function getSelectFields() {
//		global $wgContentHandlerUseDB, $wgPageLanguageUseDB;
//
//		$fields = [
//		'page_namespace', 'page_title', 'page_id',
//			'page_len', 'page_is_redirect', 'page_latest',
//		];
//
//		if ( $wgContentHandlerUseDB ) {
//			$fields[] = 'page_content_model';
//		}
//
//		if ( $wgPageLanguageUseDB ) {
//			$fields[] = 'page_lang';
//		}
//
//		return $fields;
//	}
//
//	/**
//	 * Create a new Title from an article ID
//	 *
//	 * @param int $id The page_id corresponding to the Title to create
//	 * @param int $flags Use Title::GAID_FOR_UPDATE to use master
//	 * @return Title|null The new object, or null on an error
//	 */
//	public static function newFromID( $id, $flags = 0 ) {
//		$db = ( $flags & self::GAID_FOR_UPDATE ) ? wfGetDB( DB_MASTER ) : wfGetDB( DB_REPLICA );
//		$row = $db->selectRow(
//			'page',
//			self::getSelectFields(),
//			[ 'page_id' => $id ],
//		__METHOD__
//		);
//		if ( $row !== false ) {
//			$title = self::newFromRow( $row );
//		} else {
//			$title = null;
//		}
//
//		return $title;
//	}
//
//	/**
//	 * Make an array of titles from an array of IDs
//	 *
//	 * @param int[] $ids Array of IDs
//	 * @return Title[] Array of Titles
//	 */
//	public static function newFromIDs( $ids ) {
//		if ( !count( $ids ) ) {
//			return [];
//		}
//		$dbr = wfGetDB( DB_REPLICA );
//
//		$res = $dbr->select(
//			'page',
//			self::getSelectFields(),
//			[ 'page_id' => $ids ],
//		__METHOD__
//		);
//
//		$titles = [];
//		foreach ( $res as $row ) {
//			$titles[] = self::newFromRow( $row );
//		}
//		return $titles;
//	}
//
//	/**
//	 * Make a Title object from a DB row
//	 *
//	 * @param stdClass $row Object database row (needs at least page_title,page_namespace)
//	 * @return Title Corresponding Title
//	 */
//	public static function newFromRow( $row ) {
//		$t = self::makeTitle( $row->page_namespace, $row->page_title );
//		$t->loadFromRow( $row );
//		return $t;
//	}
//
//	/**
//	 * Load Title object fields from a DB row.
//	 * If false is given, the title will be treated as non-existing.
//	 *
//	 * @param stdClass|bool $row Database row
//	 */
//	public function loadFromRow( $row ) {
//		if ( $row ) { // page found
//			if ( isset( $row->page_id ) ) {
//				$this->mArticleID = (int)$row->page_id;
//			}
//			if ( isset( $row->page_len ) ) {
//				$this->mLength = (int)$row->page_len;
//			}
//			if ( isset( $row->page_is_redirect ) ) {
//				$this->mRedirect = (bool)$row->page_is_redirect;
//			}
//			if ( isset( $row->page_latest ) ) {
//				$this->mLatestID = (int)$row->page_latest;
//			}
//			if ( !$this->mForcedContentModel && isset( $row->page_content_model ) ) {
//				$this->mContentModel = (string)$row->page_content_model;
//			} elseif ( !$this->mForcedContentModel ) {
//				$this->mContentModel = false; # initialized lazily in getContentModel()
//			}
//			if ( isset( $row->page_lang ) ) {
//				$this->mDbPageLanguage = (string)$row->page_lang;
//			}
//			if ( isset( $row->page_restrictions ) ) {
//				$this->mOldRestrictions = $row->page_restrictions;
//			}
//		} else { // page not found
//			$this->mArticleID = 0;
//			$this->mLength = 0;
//			$this->mRedirect = false;
//			$this->mLatestID = 0;
//			if ( !$this->mForcedContentModel ) {
//				$this->mContentModel = false; # initialized lazily in getContentModel()
//			}
//		}
//	}
//
//	/**
//	 * Create a new Title from a namespace index and a DB key.
//	 *
//	 * It's assumed that $ns and $title are safe, for instance when
//	 * they came directly from the database or a special page name,
//	 * not from user input.
//	 *
//	 * No validation is applied. For convenience, spaces are normalized
//	 * to underscores, so that e.g. user_text fields can be used directly.
//	 *
//	 * @note This method may return Title objects that are "invalid"
//	 * according to the isValid() method. This is usually caused by
//	 * configuration changes: e.g. a namespace that was once defined is
//	 * no longer configured, or a character that was once allowed in
//	 * titles is now forbidden.
//	 *
//	 * @param int $ns The namespace of the article
//	 * @param string $title The unprefixed database key form
//	 * @param string $fragment The link fragment (after the "#")
//	 * @param string $interwiki The interwiki prefix
//	 * @return Title The new object
//	 */
//	public static function makeTitle( $ns, $title, $fragment = '', $interwiki = '' ) {
//		$t = new Title();
//		$t->mInterwiki = $interwiki;
//		$t->mFragment = $fragment;
//		$t->mNamespace = $ns = (int)$ns;
//		$t->mDbkeyform = strtr( $title, ' ', '_' );
//		$t->mArticleID = ( $ns >= 0 ) ? -1 : 0;
//		$t->mUrlform = wfUrlencode( $t->mDbkeyform );
//		$t->mTextform = strtr( $title, '_', ' ' );
//		$t->mContentModel = false; # initialized lazily in getContentModel()
//		return $t;
//	}
//
//	/**
//	 * Create a new Title from a namespace index and a DB key.
//	 * The parameters will be checked for validity, which is a bit slower
//	 * than makeTitle() but safer for user-provided data.
//	 *
//	 * Title objects returned by makeTitleSafe() are guaranteed to be valid,
//	 * that is, they return true from the isValid() method. If no valid Title
//	 * can be constructed from the input, this method returns null.
//	 *
//	 * @param int $ns The namespace of the article
//	 * @param string $title Database key form
//	 * @param string $fragment The link fragment (after the "#")
//	 * @param string $interwiki Interwiki prefix
//	 * @return Title|null The new object, or null on an error
//	 */
//	public static function makeTitleSafe( $ns, $title, $fragment = '', $interwiki = '' ) {
//		// NOTE: ideally, this would just call makeTitle() and then isValid(),
//		// but presently, that means more overhead on a potential performance hotspot.
//
//		if ( !MWNamespace::exists( $ns ) ) {
//			return null;
//		}
//
//		$t = new Title();
//		$t->mDbkeyform = self::makeName( $ns, $title, $fragment, $interwiki, true );
//
//		try {
//			$t->secureAndSplit();
//			return $t;
//		} catch ( MalformedTitleException $ex ) {
//			return null;
//		}
//	}
//
//	/**
//	 * Create a new Title for the Main Page
//	 *
//	 * @note The Title instance returned by this method is not guaranteed to be a fresh instance.
//	 * It may instead be a cached instance created previously, with references to it remaining
//	 * elsewhere.
//	 *
//	 * @return Title The new object
//	 */
//	public static function newMainPage() {
//		$title = self::newFromText( wfMessage( 'mainpage' )->inContentLanguage()->text() );
//		// Don't give fatal errors if the message is broken
//		if ( !$title ) {
//			$title = self::newFromText( 'Main Page' );
//		}
//		return $title;
//	}
//
//	/**
//	 * Get the prefixed DB key associated with an ID
//	 *
//	 * @param int $id The page_id of the article
//	 * @return Title|null An object representing the article, or null if no such article was found
//	 */
//	public static function nameOf( $id ) {
//		$dbr = wfGetDB( DB_REPLICA );
//
//		$s = $dbr->selectRow(
//			'page',
//			[ 'page_namespace', 'page_title' ],
//			[ 'page_id' => $id ],
//		__METHOD__
//		);
//		if ( $s === false ) {
//			return null;
//		}
//
//		$n = self::makeName( $s->page_namespace, $s->page_title );
//		return $n;
//	}
//
//	/**
//	 * Get a regex character class describing the legal characters in a link
//	 *
//	 * @return string The list of characters, not delimited
//	 */
//	public static function legalChars() {
//		global $wgLegalTitleChars;
//		return $wgLegalTitleChars;
//	}
//
//	/**
//	 * Utility method for converting a character sequence from bytes to Unicode.
//	 *
//	 * Primary usecase being converting $wgLegalTitleChars to a sequence usable in
//	 * javascript, as PHP uses UTF-8 bytes where javascript uses Unicode code units.
//	 *
//	 * @param string $byteClass
//	 * @return string
//	 */
//	public static function convertByteClassToUnicodeClass( $byteClass ) {
//		$length = strlen( $byteClass );
//		// Input token queue
//		$x0 = $x1 = $x2 = '';
//		// Decoded queue
//		$d0 = $d1 = $d2 = '';
//		// Decoded integer codepoints
//		$ord0 = $ord1 = $ord2 = 0;
//		// Re-encoded queue
//		$r0 = $r1 = $r2 = '';
//		// Output
//		$out = '';
//		// Flags
//		$allowUnicode = false;
//		for ( $pos = 0; $pos < $length; $pos++ ) {
//			// Shift the queues down
//			$x2 = $x1;
//			$x1 = $x0;
//			$d2 = $d1;
//			$d1 = $d0;
//			$ord2 = $ord1;
//			$ord1 = $ord0;
//			$r2 = $r1;
//			$r1 = $r0;
//			// Load the current input token and decoded values
//			$inChar = $byteClass[$pos];
//			if ( $inChar == '\\' ) {
//				if ( preg_match( '/x([0-9a-fA-F]{2})/A', $byteClass, $m, 0, $pos + 1 ) ) {
//					$x0 = $inChar . $m[0];
//					$d0 = chr( hexdec( $m[1] ) );
//					$pos += strlen( $m[0] );
//				} elseif ( preg_match( '/[0-7]{3}/A', $byteClass, $m, 0, $pos + 1 ) ) {
//					$x0 = $inChar . $m[0];
//					$d0 = chr( octdec( $m[0] ) );
//					$pos += strlen( $m[0] );
//				} elseif ( $pos + 1 >= $length ) {
//					$x0 = $d0 = '\\';
//				} else {
//					$d0 = $byteClass[$pos + 1];
//					$x0 = $inChar . $d0;
//					$pos += 1;
//				}
//			} else {
//				$x0 = $d0 = $inChar;
//			}
//			$ord0 = ord( $d0 );
//			// Load the current re-encoded value
//			if ( $ord0 < 32 || $ord0 == 0x7f ) {
//				$r0 = sprintf( '\x%02x', $ord0 );
//			} elseif ( $ord0 >= 0x80 ) {
//				// Allow unicode if a single high-bit character appears
//				$r0 = sprintf( '\x%02x', $ord0 );
//				$allowUnicode = true;
//				// @phan-suppress-next-line PhanParamSuspiciousOrder false positive
//			} elseif ( strpos( '-\\[]^', $d0 ) !== false ) {
//				$r0 = '\\' . $d0;
//			} else {
//				$r0 = $d0;
//			}
//			// Do the output
//			if ( $x0 !== '' && $x1 === '-' && $x2 !== '' ) {
//				// Range
//				if ( $ord2 > $ord0 ) {
//					// Empty range
//				} elseif ( $ord0 >= 0x80 ) {
//					// Unicode range
//					$allowUnicode = true;
//					if ( $ord2 < 0x80 ) {
//						// Keep the non-unicode section of the range
//						$out .= "$r2-\\x7F";
//					}
//				} else {
//					// Normal range
//					$out .= "$r2-$r0";
//				}
//				// Reset state to the initial value
//				$x0 = $x1 = $d0 = $d1 = $r0 = $r1 = '';
//			} elseif ( $ord2 < 0x80 ) {
//				// ASCII character
//				$out .= $r2;
//			}
//		}
//		if ( $ord1 < 0x80 ) {
//			$out .= $r1;
//		}
//		if ( $ord0 < 0x80 ) {
//			$out .= $r0;
//		}
//		if ( $allowUnicode ) {
//			$out .= '\u0080-\uFFFF';
//		}
//		return $out;
//	}
//
//	/**
//	 * Make a prefixed DB key from a DB key and a namespace index
//	 *
//	 * @param int $ns Numerical representation of the namespace
//	 * @param string $title The DB key form the title
//	 * @param string $fragment The link fragment (after the "#")
//	 * @param string $interwiki The interwiki prefix
//	 * @param bool $canonicalNamespace If true, use the canonical name for
//	 *   $ns instead of the localized version.
//	 * @return string The prefixed form of the title
//	 */
//	public static function makeName( $ns, $title, $fragment = '', $interwiki = '',
//									 $canonicalNamespace = false
//	) {
//		if ( $canonicalNamespace ) {
//			$namespace = MWNamespace::getCanonicalName( $ns );
//		} else {
//			$namespace = MediaWikiServices::getInstance()->getContentLanguage()->getNsText( $ns );
//		}
//		$name = $namespace == '' ? $title : "$namespace:$title";
//		if ( strval( $interwiki ) != '' ) {
//			$name = "$interwiki:$name";
//		}
//		if ( strval( $fragment ) != '' ) {
//			$name .= '#' . $fragment;
//		}
//		return $name;
//	}
//
//	/**
//	 * Callback for usort() to do title sorts by (namespace, title)
//	 *
//	 * @param LinkTarget $a
//	 * @param LinkTarget $b
//	 *
//	 * @return int Result of string comparison, or namespace comparison
//	 */
//	public static function compare( LinkTarget $a, LinkTarget $b ) {
//		return $a->getNamespace() <=> $b->getNamespace()
//			?: strcmp( $a->getText(), $b->getText() );
//	}
//
//	/**
//	 * Returns true if the title is valid, false if it is invalid.
//	 *
//	 * Valid titles can be round-tripped via makeTitleSafe() and newFromText().
//	 * Invalid titles may get returned from makeTitle(), and it may be useful to
//	 * allow them to exist, e.g. in order to process log entries about pages in
//	 * namespaces that belong to extensions that are no longer installed.
//	 *
//	 * @note This method is relatively expensive. When constructing Title
//	 * objects that need to be valid, use an instantiator method that is guaranteed
//	 * to return valid titles, such as makeTitleSafe() or newFromText().
//	 *
//	 * @return bool
//	 */
//	public function isValid() {
//		if ( !MWNamespace::exists( $this->mNamespace ) ) {
//			return false;
//		}
//
//		try {
//			$parser = MediaWikiServices::getInstance()->getTitleParser();
//			$parser->parseTitle( $this->mDbkeyform, $this->mNamespace );
//			return true;
//		} catch ( MalformedTitleException $ex ) {
//			return false;
//		}
//	}
//
//	/**
//	 * Determine whether the object refers to a page within
//	 * this project (either this wiki or a wiki with a local
//	 * interwiki, see https://www.mediawiki.org/wiki/Manual:Interwiki_table#iw_local )
//	 *
//	 * @return bool True if this is an in-project interwiki link or a wikilink, false otherwise
//	 */
//	public function isLocal() {
//		if ( $this->isExternal() ) {
//			$iw = self::getInterwikiLookup()->fetch( $this->mInterwiki );
//			if ( $iw ) {
//				return $iw->isLocal();
//			}
//		}
//		return true;
//	}
//
//	/**
//	 * Is this Title interwiki?
//	 *
//	 * @return bool
//	 */
//	public function isExternal() {
//		return $this->mInterwiki !== '';
//	}
//
//	/**
//	 * Get the interwiki prefix
//	 *
//	 * Use Title::isExternal to check if a interwiki is set
//	 *
//	 * @return string Interwiki prefix
//	 */
//	public function getInterwiki() {
//		return $this->mInterwiki;
//	}
//
//	/**
//	 * Was this a local interwiki link?
//	 *
//	 * @return bool
//	 */
//	public function wasLocalInterwiki() {
//		return $this->mLocalInterwiki;
//	}
//
//	/**
//	 * Determine whether the object refers to a page within
//	 * this project and is transcludable.
//	 *
//	 * @return bool True if this is transcludable
//	 */
//	public function isTrans() {
//		if ( !$this->isExternal() ) {
//			return false;
//		}
//
//		return self::getInterwikiLookup()->fetch( $this->mInterwiki )->isTranscludable();
//	}
//
//	/**
//	 * Returns the DB name of the distant wiki which owns the object.
//	 *
//	 * @return string|false The DB name
//	 */
//	public function getTransWikiID() {
//		if ( !$this->isExternal() ) {
//			return false;
//		}
//
//		return self::getInterwikiLookup()->fetch( $this->mInterwiki )->getWikiID();
//	}
//
//	/**
//	 * Get a TitleValue object representing this Title.
//	 *
//	 * @note Not all valid Titles have a corresponding valid TitleValue
//	 * (e.g. TitleValues cannot represent page-local links that have a
//	 * fragment but no title text).
//	 *
//	 * @return TitleValue|null
//	 */
//	public function getTitleValue() {
//		if ( $this->mTitleValue === null ) {
//			try {
//				$this->mTitleValue = new TitleValue(
//					$this->mNamespace,
//					$this->mDbkeyform,
//					$this->mFragment,
//					$this->mInterwiki
//				);
//			} catch ( InvalidArgumentException $ex ) {
//				wfDebug( __METHOD__ . ': Can\'t create a TitleValue for [[' .
//					$this->getPrefixedText() . ']]: ' . $ex->getMessage() . "\n" );
//			}
//		}
//
//		return $this->mTitleValue;
//	}
//
//	/**
//	 * Get the text form (spaces not underscores) of the main part
//	 *
//	 * @return string Main part of the title
//	 */
//	public function getText() {
//		return $this->mTextform;
//	}
//
//	/**
//	 * Get the URL-encoded form of the main part
//	 *
//	 * @return string Main part of the title, URL-encoded
//	 */
//	public function getPartialURL() {
//		return $this->mUrlform;
//	}
//
//	/**
//	 * Get the main part with underscores
//	 *
//	 * @return string Main part of the title, with underscores
//	 */
//	public function getDBkey() {
//		return $this->mDbkeyform;
//	}
//
//	/**
//	 * Get the DB key with the initial letter case as specified by the user
//	 * @deprecated since 1.33; please use Title::getDBKey() instead
//	 *
//	 * @return string DB key
//	 */
//	function getUserCaseDBKey() {
//		if ( !is_null( $this->mUserCaseDBKey ) ) {
//			return $this->mUserCaseDBKey;
//		} else {
//			// If created via makeTitle(), $this->mUserCaseDBKey is not set.
//			return $this->mDbkeyform;
//		}
//	}
//
//	/**
//	 * Get the namespace index, i.e. one of the NS_xxxx constants.
//	 *
//	 * @return int Namespace index
//	 */
//	public function getNamespace() {
//		return $this->mNamespace;
//	}
//
//	/**
//	 * Get the page's content model id, see the CONTENT_MODEL_XXX constants.
//	 *
//	 * @todo Deprecate this in favor of SlotRecord::getModel()
//	 *
//	 * @param int $flags A bit field; may be Title::GAID_FOR_UPDATE to select for update
//	 * @return string Content model id
//	 */
//	public function getContentModel( $flags = 0 ) {
//		if ( !$this->mForcedContentModel
//			&& ( !$this->mContentModel || $flags === self::GAID_FOR_UPDATE )
//			&& $this->getArticleID( $flags )
//		) {
//			$linkCache = MediaWikiServices::getInstance()->getLinkCache();
//			$linkCache->addLinkObj( $this ); # in case we already had an article ID
//				$this->mContentModel = $linkCache->getGoodLinkFieldObj( $this, 'model' );
//		}
//
//		if ( !$this->mContentModel ) {
//			$this->mContentModel = ContentHandler::getDefaultModelFor( $this );
//		}
//
//		return $this->mContentModel;
//	}
//
//	/**
//	 * Convenience method for checking a title's content model name
//	 *
//	 * @param string $id The content model ID (use the CONTENT_MODEL_XXX constants).
//	 * @return bool True if $this->getContentModel() == $id
//	 */
//	public function hasContentModel( $id ) {
//		return $this->getContentModel() == $id;
//	}
//
//	/**
//	 * Set a proposed content model for the page for permissions
//	 * checking. This does not actually change the content model
//	 * of a title!
//	 *
//	 * Additionally, you should make sure you've checked
//	 * ContentHandler::canBeUsedOn() first.
//	 *
//	 * @since 1.28
//	 * @param string $model CONTENT_MODEL_XXX constant
//	 */
//	public function setContentModel( $model ) {
//		$this->mContentModel = $model;
//		$this->mForcedContentModel = true;
//	}
//
//	/**
//	 * Get the namespace text
//	 *
//	 * @return string|false Namespace text
//	 */
//	public function getNsText() {
//		if ( $this->isExternal() ) {
//			// This probably shouldn't even happen, except for interwiki transclusion.
//			// If possible, use the canonical name for the foreign namespace.
//			$nsText = MWNamespace::getCanonicalName( $this->mNamespace );
//			if ( $nsText !== false ) {
//				return $nsText;
//			}
//		}
//
//		try {
//			$formatter = self::getTitleFormatter();
//			return $formatter->getNamespaceName( $this->mNamespace, $this->mDbkeyform );
//		} catch ( InvalidArgumentException $ex ) {
//			wfDebug( __METHOD__ . ': ' . $ex->getMessage() . "\n" );
//			return false;
//		}
//	}
//
//	/**
//	 * Get the namespace text of the subject (rather than talk) page
//	 *
//	 * @return string Namespace text
//	 */
//	public function getSubjectNsText() {
//		return MediaWikiServices::getInstance()->getContentLanguage()->
//		getNsText( MWNamespace::getSubject( $this->mNamespace ) );
//	}
//
//	/**
//	 * Get the namespace text of the talk page
//	 *
//	 * @return string Namespace text
//	 */
//	public function getTalkNsText() {
//		return MediaWikiServices::getInstance()->getContentLanguage()->
//		getNsText( MWNamespace::getTalk( $this->mNamespace ) );
//	}
//
//	/**
//	 * Can this title have a corresponding talk page?
//	 *
//	 * @see MWNamespace::hasTalkNamespace
//	 * @since 1.30
//	 *
//	 * @return bool True if this title either is a talk page or can have a talk page associated.
//	 */
//	public function canHaveTalkPage() {
//		return MWNamespace::hasTalkNamespace( $this->mNamespace );
//	}
//
//	/**
//	 * Is this in a namespace that allows actual pages?
//	 *
//	 * @return bool
//	 */
//	public function canExist() {
//		return $this->mNamespace >= NS_MAIN;
//	}
//
//	/**
//	 * Can this title be added to a user's watchlist?
//	 *
//	 * @return bool
//	 */
//	public function isWatchable() {
//		return !$this->isExternal() && MWNamespace::isWatchable( $this->mNamespace );
//	}
//
//	/**
//	 * Returns true if this is a special page.
//	 *
//	 * @return bool
//	 */
//	public function isSpecialPage() {
//		return $this->mNamespace == NS_SPECIAL;
//	}
//
//	/**
//	 * Returns true if this title resolves to the named special page
//	 *
//	 * @param string $name The special page name
//	 * @return bool
//	 */
//	public function isSpecial( $name ) {
//		if ( $this->isSpecialPage() ) {
//			list( $thisName, /* $subpage */ ) =
//				MediaWikiServices::getInstance()->getSpecialPageFactory()->
//			resolveAlias( $this->mDbkeyform );
//			if ( $name == $thisName ) {
//				return true;
//			}
//		}
//		return false;
//	}
//
//	/**
//	 * If the Title refers to a special page alias which is not the local default, resolve
//	 * the alias, and localise the name as necessary.  Otherwise, return $this
//	 *
//	 * @return Title
//	 */
//	public function fixSpecialName() {
//		if ( $this->isSpecialPage() ) {
//			$spFactory = MediaWikiServices::getInstance()->getSpecialPageFactory();
//			list( $canonicalName, $par ) = $spFactory->resolveAlias( $this->mDbkeyform );
//			if ( $canonicalName ) {
//				$localName = $spFactory->getLocalNameFor( $canonicalName, $par );
//				if ( $localName != $this->mDbkeyform ) {
//					return self::makeTitle( NS_SPECIAL, $localName );
//				}
//			}
//		}
//		return $this;
//	}
//
//	/**
//	 * Returns true if the title is inside the specified namespace.
//	 *
//	 * Please make use of this instead of comparing to getNamespace()
//	 * This function is much more resistant to changes we may make
//	 * to namespaces than code that makes direct comparisons.
//	 * @param int $ns The namespace
//	 * @return bool
//	 * @since 1.19
//	 */
//	public function inNamespace( $ns ) {
//		return MWNamespace::equals( $this->mNamespace, $ns );
//	}
//
//	/**
//	 * Returns true if the title is inside one of the specified namespaces.
//	 *
//	 * @param int|int[] $namespaces,... The namespaces to check for
//	 * @return bool
//	 * @since 1.19
//	 */
//	public function inNamespaces( /* ... */ ) {
//		$namespaces = func_get_args();
//		if ( count( $namespaces ) > 0 && is_array( $namespaces[0] ) ) {
//			$namespaces = $namespaces[0];
//		}
//
//		foreach ( $namespaces as $ns ) {
//			if ( $this->inNamespace( $ns ) ) {
//				return true;
//			}
//		}
//
//		return false;
//	}
//
//	/**
//	 * Returns true if the title has the same subject namespace as the
//	 * namespace specified.
//	 * For example this method will take NS_USER and return true if namespace
//	 * is either NS_USER or NS_USER_TALK since both of them have NS_USER
//	 * as their subject namespace.
//	 *
//	 * This is MUCH simpler than individually testing for equivalence
//	 * against both NS_USER and NS_USER_TALK, and is also forward compatible.
//	 * @since 1.19
//	 * @param int $ns
//	 * @return bool
//	 */
//	public function hasSubjectNamespace( $ns ) {
//		return MWNamespace::subjectEquals( $this->mNamespace, $ns );
//	}
//
//	/**
//	 * Is this Title in a namespace which contains content?
//	 * In other words, is this a content page, for the purposes of calculating
//	 * statistics, etc?
//	 *
//	 * @return bool
//	 */
//	public function isContentPage() {
//		return MWNamespace::isContent( $this->mNamespace );
//	}
//
//	/**
//	 * Would anybody with sufficient privileges be able to move this page?
//	 * Some pages just aren't movable.
//	 *
//	 * @return bool
//	 */
//	public function isMovable() {
//		if ( !MWNamespace::isMovable( $this->mNamespace ) || $this->isExternal() ) {
//			// Interwiki title or immovable namespace. Hooks don't get to override here
//			return false;
//		}
//
//		$result = true;
//		Hooks::run( 'TitleIsMovable', [ $this, &$result ] );
//		return $result;
//	}
//
//	/**
//	 * Is this the mainpage?
//	 * @note Title::newFromText seems to be sufficiently optimized by the title
//	 * cache that we don't need to over-optimize by doing direct comparisons and
//	 * accidentally creating new bugs where $title->equals( Title::newFromText() )
//	 * ends up reporting something differently than $title->isMainPage();
//	 *
//	 * @since 1.18
//	 * @return bool
//	 */
//	public function isMainPage() {
//		return $this->equals( self::newMainPage() );
//	}
//
//	/**
//	 * Is this a subpage?
//	 *
//	 * @return bool
//	 */
//	public function isSubpage() {
//		return MWNamespace::hasSubpages( $this->mNamespace )
//			? strpos( $this->getText(), '/' ) !== false
//			: false;
//	}
//
//	/**
//	 * Is this a conversion table for the LanguageConverter?
//	 *
//	 * @return bool
//	 */
//	public function isConversionTable() {
//		// @todo ConversionTable should become a separate content model.
//
//		return $this->mNamespace == NS_MEDIAWIKI &&
//			strpos( $this->getText(), 'Conversiontable/' ) === 0;
//	}
//
//	/**
//	 * Does that page contain wikitext, or it is JS, CSS or whatever?
//	 *
//	 * @return bool
//	 */
//	public function isWikitextPage() {
//		return $this->hasContentModel( CONTENT_MODEL_WIKITEXT );
//	}
//
//	/**
//	 * Could this MediaWiki namespace page contain custom CSS, JSON, or JavaScript for the
//	 * global UI. This is generally true for pages in the MediaWiki namespace having
//	 * CONTENT_MODEL_CSS, CONTENT_MODEL_JSON, or CONTENT_MODEL_JAVASCRIPT.
//	 *
//	 * This method does *not* return true for per-user JS/JSON/CSS. Use isUserConfigPage()
//	 * for that!
//	 *
//	 * Note that this method should not return true for pages that contain and show
//	 * "inactive" CSS, JSON, or JS.
//	 *
//	 * @return bool
//	 * @since 1.31
//	 */
//	public function isSiteConfigPage() {
//		return (
//			$this->isSiteCssConfigPage()
//				|| $this->isSiteJsonConfigPage()
//				|| $this->isSiteJsConfigPage()
//		);
//	}
//
//	/**
//	 * Is this a "config" (.css, .json, or .js) sub-page of a user page?
//	 *
//	 * @return bool
//	 * @since 1.31
//	 */
//	public function isUserConfigPage() {
//		return (
//			$this->isUserCssConfigPage()
//				|| $this->isUserJsonConfigPage()
//				|| $this->isUserJsConfigPage()
//		);
//	}
//
//	/**
//	 * Trim down a .css, .json, or .js subpage title to get the corresponding skin name
//	 *
//	 * @return string Containing skin name from .css, .json, or .js subpage title
//	 * @since 1.31
//	 */
//	public function getSkinFromConfigSubpage() {
//		$subpage = explode( '/', $this->mTextform );
//		$subpage = $subpage[count( $subpage ) - 1];
//		$lastdot = strrpos( $subpage, '.' );
//		if ( $lastdot === false ) {
//			return $subpage; # Never happens: only called for names ending in '.css'/'.json'/'.js'
//		}
//		return substr( $subpage, 0, $lastdot );
//	}
//
//	/**
//	 * Is this a CSS "config" sub-page of a user page?
//	 *
//	 * @return bool
//	 * @since 1.31
//	 */
//	public function isUserCssConfigPage() {
//		return (
//			NS_USER == $this->mNamespace
//				&& $this->isSubpage()
//				&& $this->hasContentModel( CONTENT_MODEL_CSS )
//		);
//	}
//
//	/**
//	 * Is this a JSON "config" sub-page of a user page?
//	 *
//	 * @return bool
//	 * @since 1.31
//	 */
//	public function isUserJsonConfigPage() {
//		return (
//			NS_USER == $this->mNamespace
//				&& $this->isSubpage()
//				&& $this->hasContentModel( CONTENT_MODEL_JSON )
//		);
//	}
//
//	/**
//	 * Is this a JS "config" sub-page of a user page?
//	 *
//	 * @return bool
//	 * @since 1.31
//	 */
//	public function isUserJsConfigPage() {
//		return (
//			NS_USER == $this->mNamespace
//				&& $this->isSubpage()
//				&& $this->hasContentModel( CONTENT_MODEL_JAVASCRIPT )
//		);
//	}
//
//	/**
//	 * Is this a sitewide CSS "config" page?
//	 *
//	 * @return bool
//	 * @since 1.32
//	 */
//	public function isSiteCssConfigPage() {
//		return (
//			NS_MEDIAWIKI == $this->mNamespace
//				&& (
//				$this->hasContentModel( CONTENT_MODEL_CSS )
//					// paranoia - a MediaWiki: namespace page with mismatching extension and content
//					// model is probably by mistake and might get handled incorrectly (see e.g. T112937)
//					|| substr( $this->mDbkeyform, -4 ) === '.css'
//			)
//		);
//	}
//
//	/**
//	 * Is this a sitewide JSON "config" page?
//	 *
//	 * @return bool
//	 * @since 1.32
//	 */
//	public function isSiteJsonConfigPage() {
//		return (
//			NS_MEDIAWIKI == $this->mNamespace
//				&& (
//				$this->hasContentModel( CONTENT_MODEL_JSON )
//					// paranoia - a MediaWiki: namespace page with mismatching extension and content
//					// model is probably by mistake and might get handled incorrectly (see e.g. T112937)
//					|| substr( $this->mDbkeyform, -5 ) === '.json'
//			)
//		);
//	}
//
//	/**
//	 * Is this a sitewide JS "config" page?
//	 *
//	 * @return bool
//	 * @since 1.31
//	 */
//	public function isSiteJsConfigPage() {
//		return (
//			NS_MEDIAWIKI == $this->mNamespace
//				&& (
//				$this->hasContentModel( CONTENT_MODEL_JAVASCRIPT )
//					// paranoia - a MediaWiki: namespace page with mismatching extension and content
//					// model is probably by mistake and might get handled incorrectly (see e.g. T112937)
//					|| substr( $this->mDbkeyform, -3 ) === '.js'
//			)
//		);
//	}
//
//	/**
//	 * Is this a message which can contain raw HTML?
//	 *
//	 * @return bool
//	 * @since 1.32
//	 */
//	public function isRawHtmlMessage() {
//		global $wgRawHtmlMessages;
//
//		if ( !$this->inNamespace( NS_MEDIAWIKI ) ) {
//			return false;
//		}
//		$message = lcfirst( $this->getRootTitle()->getDBkey() );
//		return in_array( $message, $wgRawHtmlMessages, true );
//	}
//
//	/**
//	 * Is this a talk page of some sort?
//	 *
//	 * @return bool
//	 */
//	public function isTalkPage() {
//		return MWNamespace::isTalk( $this->mNamespace );
//	}
//
//	/**
//	 * Get a Title object associated with the talk page of this article
//	 *
//	 * @return Title The object for the talk page
//	 */
//	public function getTalkPage() {
//		return self::makeTitle( MWNamespace::getTalk( $this->mNamespace ), $this->mDbkeyform );
//	}
//
//	/**
//	 * Get a Title object associated with the talk page of this article,
//	 * if such a talk page can exist.
//	 *
//	 * @since 1.30
//	 *
//	 * @return Title|null The object for the talk page,
//	 *         or null if no associated talk page can exist, according to canHaveTalkPage().
//	 */
//	public function getTalkPageIfDefined() {
//		if ( !$this->canHaveTalkPage() ) {
//			return null;
//		}
//
//		return $this->getTalkPage();
//	}
//
//	/**
//	 * Get a title object associated with the subject page of this
//	 * talk page
//	 *
//	 * @return Title The object for the subject page
//	 */
//	public function getSubjectPage() {
//		// Is this the same title?
//		$subjectNS = MWNamespace::getSubject( $this->mNamespace );
//		if ( $this->mNamespace == $subjectNS ) {
//			return $this;
//		}
//		return self::makeTitle( $subjectNS, $this->mDbkeyform );
//	}
//
//	/**
//	 * Get the other title for this page, if this is a subject page
//	 * get the talk page, if it is a subject page get the talk page
//	 *
//	 * @since 1.25
//	 * @throws MWException If the page doesn't have an other page
//	 * @return Title
//	 */
//	public function getOtherPage() {
//		if ( $this->isSpecialPage() ) {
//			throw new MWException( 'Special pages cannot have other pages' );
//		}
//		if ( $this->isTalkPage() ) {
//			return $this->getSubjectPage();
//		} else {
//			if ( !$this->canHaveTalkPage() ) {
//				throw new MWException( "{$this->getPrefixedText()} does not have an other page" );
//			}
//			return $this->getTalkPage();
//		}
//	}
//
//	/**
//	 * Get the default namespace index, for when there is no namespace
//	 *
//	 * @return int Default namespace index
//	 */
//	public function getDefaultNamespace() {
//		return $this->mDefaultNamespace;
//	}
//
//	/**
//	 * Get the Title fragment (i.e.\ the bit after the #) in text form
//	 *
//	 * Use Title::hasFragment to check for a fragment
//	 *
//	 * @return string Title fragment
//	 */
//	public function getFragment() {
//		return $this->mFragment;
//	}
//
//	/**
//	 * Check if a Title fragment is set
//	 *
//	 * @return bool
//	 * @since 1.23
//	 */
//	public function hasFragment() {
//		return $this->mFragment !== '';
//	}
//
//	/**
//	 * Get the fragment in URL form, including the "#" character if there is one
//	 *
//	 * @return string Fragment in URL form
//	 */
//	public function getFragmentForURL() {
//		if ( !$this->hasFragment() ) {
//			return '';
//		} elseif ( $this->isExternal() ) {
//			// Note: If the interwiki is unknown, it's treated as a namespace on the local wiki,
//			// so we treat it like a local interwiki.
//			$interwiki = self::getInterwikiLookup()->fetch( $this->mInterwiki );
//			if ( $interwiki && !$interwiki->isLocal() ) {
//				return '#' . Sanitizer::escapeIdForExternalInterwiki( $this->mFragment );
//			}
//		}
//
//		return '#' . Sanitizer::escapeIdForLink( $this->mFragment );
//	}
//
//	/**
//	 * Set the fragment for this title. Removes the first character from the
//	 * specified fragment before setting, so it assumes you're passing it with
//	 * an initial "#".
//	 *
//	 * Deprecated for public use, use Title::makeTitle() with fragment parameter,
//	 * or Title::createFragmentTarget().
//	 * Still in active use privately.
//	 *
//	 * @private
//	 * @param string $fragment Text
//	 */
//	public function setFragment( $fragment ) {
//		$this->mFragment = strtr( substr( $fragment, 1 ), '_', ' ' );
//	}
//
//	/**
//	 * Creates a new Title for a different fragment of the same page.
//	 *
//	 * @since 1.27
//	 * @param string $fragment
//	 * @return Title
//	 */
//	public function createFragmentTarget( $fragment ) {
//		return self::makeTitle(
//			$this->mNamespace,
//			$this->getText(),
//			$fragment,
//			$this->mInterwiki
//		);
//	}
//
//	/**
//	 * Prefix some arbitrary text with the namespace or interwiki prefix
//	 * of this object
//	 *
//	 * @param string $name The text
//	 * @return string The prefixed text
//	 */
//	private function prefix( $name ) {
//		$p = '';
//		if ( $this->isExternal() ) {
//			$p = $this->mInterwiki . ':';
//		}
//
//		if ( $this->mNamespace != 0 ) {
//			$nsText = $this->getNsText();
//
//			if ( $nsText === false ) {
//				// See T165149. Awkward, but better than erroneously linking to the main namespace.
//				$nsText = MediaWikiServices::getInstance()->getContentLanguage()->
//				getNsText( NS_SPECIAL ) . ":Badtitle/NS{$this->mNamespace}";
//			}
//
//			$p .= $nsText . ':';
//		}
//		return $p . $name;
//	}
//
//	/**
//	 * Get the prefixed database key form
//	 *
//	 * @return string The prefixed title, with underscores and
//	 *  any interwiki and namespace prefixes
//	 */
//	public function getPrefixedDBkey() {
//		$s = $this->prefix( $this->mDbkeyform );
//		$s = strtr( $s, ' ', '_' );
//		return $s;
//	}
//
//	/**
//	 * Get the prefixed title with spaces.
//	 * This is the form usually used for display
//	 *
//	 * @return string The prefixed title, with spaces
//	 */
//	public function getPrefixedText() {
//		if ( $this->prefixedText === null ) {
//			$s = $this->prefix( $this->mTextform );
//			$s = strtr( $s, '_', ' ' );
//			$this->prefixedText = $s;
//		}
//		return $this->prefixedText;
//	}
//
//	/**
//	 * Return a string representation of this title
//	 *
//	 * @return string Representation of this title
//	 */
//	public function __toString() {
//		return $this->getPrefixedText();
//	}
//
//	/**
//	 * Get the prefixed title with spaces, plus any fragment
//	 * (part beginning with '#')
//	 *
//	 * @return string The prefixed title, with spaces and the fragment, including '#'
//	 */
//	public function getFullText() {
//		$text = $this->getPrefixedText();
//		if ( $this->hasFragment() ) {
//			$text .= '#' . $this->mFragment;
//		}
//		return $text;
//	}
//
//	/**
//	 * Get the root page name text without a namespace, i.e. the leftmost part before any slashes
//	 *
//	 * @par Example:
//	 * @code
//	 * Title::newFromText('User:Foo/Bar/Baz')->getRootText();
//	 * # returns: 'Foo'
//	 * @endcode
//	 *
//	 * @return string Root name
//	 * @since 1.20
//	 */
//	public function getRootText() {
//		if ( !MWNamespace::hasSubpages( $this->mNamespace ) ) {
//			return $this->getText();
//		}
//
//		return strtok( $this->getText(), '/' );
//	}
//
//	/**
//	 * Get the root page name title, i.e. the leftmost part before any slashes
//	 *
//	 * @par Example:
//	 * @code
//	 * Title::newFromText('User:Foo/Bar/Baz')->getRootTitle();
//	 * # returns: Title{User:Foo}
//	 * @endcode
//	 *
//	 * @return Title Root title
//	 * @since 1.20
//	 */
//	public function getRootTitle() {
//		return self::makeTitle( $this->mNamespace, $this->getRootText() );
//	}
//
//	/**
//	 * Get the base page name without a namespace, i.e. the part before the subpage name
//	 *
//	 * @par Example:
//	 * @code
//	 * Title::newFromText('User:Foo/Bar/Baz')->getBaseText();
//	 * # returns: 'Foo/Bar'
//	 * @endcode
//	 *
//	 * @return string Base name
//	 */
//	public function getBaseText() {
//		$text = $this->getText();
//		if ( !MWNamespace::hasSubpages( $this->mNamespace ) ) {
//			return $text;
//		}
//
//		$lastSlashPos = strrpos( $text, '/' );
//		// Don't discard the real title if there's no subpage involved
//		if ( $lastSlashPos === false ) {
//			return $text;
//		}
//
//		return substr( $text, 0, $lastSlashPos );
//	}
//
//	/**
//	 * Get the base page name title, i.e. the part before the subpage name
//	 *
//	 * @par Example:
//	 * @code
//	 * Title::newFromText('User:Foo/Bar/Baz')->getBaseTitle();
//	 * # returns: Title{User:Foo/Bar}
//	 * @endcode
//	 *
//	 * @return Title Base title
//	 * @since 1.20
//	 */
//	public function getBaseTitle() {
//		return self::makeTitle( $this->mNamespace, $this->getBaseText() );
//	}
//
//	/**
//	 * Get the lowest-level subpage name, i.e. the rightmost part after any slashes
//	 *
//	 * @par Example:
//	 * @code
//	 * Title::newFromText('User:Foo/Bar/Baz')->getSubpageText();
//	 * # returns: "Baz"
//	 * @endcode
//	 *
//	 * @return string Subpage name
//	 */
//	public function getSubpageText() {
//		if ( !MWNamespace::hasSubpages( $this->mNamespace ) ) {
//			return $this->mTextform;
//		}
//		$parts = explode( '/', $this->mTextform );
//		return $parts[count( $parts ) - 1];
//	}
//
//	/**
//	 * Get the title for a subpage of the current page
//	 *
//	 * @par Example:
//	 * @code
//	 * Title::newFromText('User:Foo/Bar/Baz')->getSubpage("Asdf");
//	 * # returns: Title{User:Foo/Bar/Baz/Asdf}
//	 * @endcode
//	 *
//	 * @param string $text The subpage name to add to the title
//	 * @return Title|null Subpage title, or null on an error
//	 * @since 1.20
//	 */
//	public function getSubpage( $text ) {
//		return self::makeTitleSafe( $this->mNamespace, $this->getText() . '/' . $text );
//	}
//
//	/**
//	 * Get a URL-encoded form of the subpage text
//	 *
//	 * @return string URL-encoded subpage name
//	 */
//	public function getSubpageUrlForm() {
//		$text = $this->getSubpageText();
//		$text = wfUrlencode( strtr( $text, ' ', '_' ) );
//		return $text;
//	}
//
//	/**
//	 * Get a URL-encoded title (not an actual URL) including interwiki
//	 *
//	 * @return string The URL-encoded form
//	 */
//	public function getPrefixedURL() {
//		$s = $this->prefix( $this->mDbkeyform );
//		$s = wfUrlencode( strtr( $s, ' ', '_' ) );
//		return $s;
//	}
//
//	/**
//	 * Helper to fix up the get{Canonical,Full,Link,Local,Internal}URL args
//	 * get{Canonical,Full,Link,Local,Internal}URL methods accepted an optional
//	 * second argument named variant. This was deprecated in favor
//	 * of passing an array of option with a "variant" key
//	 * Once $query2 is removed for good, this helper can be dropped
//	 * and the wfArrayToCgi moved to getLocalURL();
//	 *
//	 * @since 1.19 (r105919)
//	 * @param array|string $query
//	 * @param string|string[]|bool $query2
//	 * @return string
//	 */
//	private static function fixUrlQueryArgs( $query, $query2 = false ) {
//		if ( $query2 !== false ) {
//			wfDeprecated( "Title::get{Canonical,Full,Link,Local,Internal}URL " .
//				"method called with a second parameter is deprecated. Add your " .
//				"parameter to an array passed as the first parameter.", "1.19" );
//		}
//		if ( is_array( $query ) ) {
//			$query = wfArrayToCgi( $query );
//		}
//		if ( $query2 ) {
//			if ( is_string( $query2 ) ) {
//				// $query2 is a string, we will consider this to be
//				// a deprecated $variant argument and add it to the query
//				$query2 = wfArrayToCgi( [ 'variant' => $query2 ] );
//			} else {
//				$query2 = wfArrayToCgi( $query2 );
//			}
//			// If we have $query content add a & to it first
//			if ( $query ) {
//				$query .= '&';
//			}
//			// Now append the queries together
//			$query .= $query2;
//		}
//		return $query;
//	}
//
//	/**
//	 * Get a real URL referring to this title, with interwiki link and
//	 * fragment
//	 *
//	 * @see self::getLocalURL for the arguments.
//	 * @see wfExpandUrl
//	 * @param string|string[] $query
//	 * @param string|string[]|bool $query2
//	 * @param string|int|null $proto Protocol type to use in URL
//	 * @return string The URL
//	 */
//	public function getFullURL( $query = '', $query2 = false, $proto = PROTO_RELATIVE ) {
//		$query = self::fixUrlQueryArgs( $query, $query2 );
//
//		# Hand off all the decisions on urls to getLocalURL
//			$url = $this->getLocalURL( $query );
//
//		# Expand the url to make it a full url. Note that getLocalURL has the
//		# potential to output full urls for a variety of reasons, so we use
//		# wfExpandUrl instead of simply prepending $wgServer
//		$url = wfExpandUrl( $url, $proto );
//
//		# Finally, add the fragment.
//		$url .= $this->getFragmentForURL();
//		// Avoid PHP 7.1 warning from passing $this by reference
//		$titleRef = $this;
//		Hooks::run( 'GetFullURL', [ &$titleRef, &$url, $query ] );
//		return $url;
//	}
//
//	/**
//	 * Get a url appropriate for making redirects based on an untrusted url arg
//	 *
//	 * This is basically the same as getFullUrl(), but in the case of external
//	 * interwikis, we send the user to a landing page, to prevent possible
//	 * phishing attacks and the like.
//	 *
//	 * @note Uses current protocol by default, since technically relative urls
//	 *   aren't allowed in redirects per HTTP spec, so this is not suitable for
//	 *   places where the url gets cached, as might pollute between
//	 *   https and non-https users.
//	 * @see self::getLocalURL for the arguments.
//	 * @param array|string $query
//	 * @param string $proto Protocol type to use in URL
//	 * @return string A url suitable to use in an HTTP location header.
//	 */
//	public function getFullUrlForRedirect( $query = '', $proto = PROTO_CURRENT ) {
//		$target = $this;
//		if ( $this->isExternal() ) {
//			$target = SpecialPage::getTitleFor(
//				'GoToInterwiki',
//				$this->getPrefixedDBkey()
//			);
//		}
//		return $target->getFullURL( $query, false, $proto );
//	}
//
//	/**
//	 * Get a URL with no fragment or server name (relative URL) from a Title object.
//	 * If this page is generated with action=render, however,
//	 * $wgServer is prepended to make an absolute URL.
//	 *
//	 * @see self::getFullURL to always get an absolute URL.
//	 * @see self::getLinkURL to always get a URL that's the simplest URL that will be
//	 *  valid to link, locally, to the current Title.
//	 * @see self::newFromText to produce a Title object.
//	 *
//	 * @param string|string[] $query An optional query string,
//	 *   not used for interwiki links. Can be specified as an associative array as well,
//	 *   e.g., array( 'action' => 'edit' ) (keys and values will be URL-escaped).
//	 *   Some query patterns will trigger various shorturl path replacements.
//	 * @param string|string[]|bool $query2 An optional secondary query array. This one MUST
//	 *   be an array. If a string is passed it will be interpreted as a deprecated
//	 *   variant argument and urlencoded into a variant= argument.
//	 *   This second query argument will be added to the $query
//	 *   The second parameter is deprecated since 1.19. Pass it as a key,value
//	 *   pair in the first parameter array instead.
//	 *
//	 * @return string String of the URL.
//	 */
//	public function getLocalURL( $query = '', $query2 = false ) {
//		global $wgArticlePath, $wgScript, $wgServer, $wgRequest;
//
//		$query = self::fixUrlQueryArgs( $query, $query2 );
//
//		$interwiki = self::getInterwikiLookup()->fetch( $this->mInterwiki );
//		if ( $interwiki ) {
//			$namespace = $this->getNsText();
//			if ( $namespace != '' ) {
//				# Can this actually happen? Interwikis shouldn't be parsed.
//				# Yes! It can in interwiki transclusion. But... it probably shouldn't.
//				$namespace .= ':';
//			}
//			$url = $interwiki->getURL( $namespace . $this->mDbkeyform );
//			$url = wfAppendQuery( $url, $query );
//		} else {
//			$dbkey = wfUrlencode( $this->getPrefixedDBkey() );
//			if ( $query == '' ) {
//				$url = str_replace( '$1', $dbkey, $wgArticlePath );
//				// Avoid PHP 7.1 warning from passing $this by reference
//				$titleRef = $this;
//				Hooks::run( 'GetLocalURL::Article', [ &$titleRef, &$url ] );
//			} else {
//				global $wgVariantArticlePath, $wgActionPaths;
//				$url = false;
//				$matches = [];
//
//				if ( !empty( $wgActionPaths )
//					&& preg_match( '/^(.*&|)action=([^&]*)(&(.*)|)$/', $query, $matches )
//				) {
//					$action = urldecode( $matches[2] );
//					if ( isset( $wgActionPaths[$action] ) ) {
//						$query = $matches[1];
//						if ( isset( $matches[4] ) ) {
//							$query .= $matches[4];
//						}
//						$url = str_replace( '$1', $dbkey, $wgActionPaths[$action] );
//						if ( $query != '' ) {
//							$url = wfAppendQuery( $url, $query );
//						}
//					}
//				}
//
//				if ( $url === false
//					&& $wgVariantArticlePath
//					&& preg_match( '/^variant=([^&]*)$/', $query, $matches )
//					&& $this->getPageLanguage()->equals(
//					MediaWikiServices::getInstance()->getContentLanguage() )
//					&& $this->getPageLanguage()->hasVariants()
//				) {
//					$variant = urldecode( $matches[1] );
//					if ( $this->getPageLanguage()->hasVariant( $variant ) ) {
//						// Only do the variant replacement if the given variant is a valid
//						// variant for the page's language.
//						$url = str_replace( '$2', urlencode( $variant ), $wgVariantArticlePath );
//						$url = str_replace( '$1', $dbkey, $url );
//					}
//				}
//
//				if ( $url === false ) {
//					if ( $query == '-' ) {
//						$query = '';
//					}
//					$url = "{$wgScript}?title={$dbkey}&{$query}";
//				}
//			}
//			// Avoid PHP 7.1 warning from passing $this by reference
//			$titleRef = $this;
//			Hooks::run( 'GetLocalURL::Internal', [ &$titleRef, &$url, $query ] );
//
//			// @todo FIXME: This causes breakage in various places when we
//			// actually expected a local URL and end up with dupe prefixes.
//			if ( $wgRequest->getVal( 'action' ) == 'render' ) {
//				$url = $wgServer . $url;
//			}
//		}
//		// Avoid PHP 7.1 warning from passing $this by reference
//		$titleRef = $this;
//		Hooks::run( 'GetLocalURL', [ &$titleRef, &$url, $query ] );
//		return $url;
//	}
//
//	/**
//	 * Get a URL that's the simplest URL that will be valid to link, locally,
//	 * to the current Title.  It includes the fragment, but does not include
//	 * the server unless action=render is used (or the link is external).  If
//	 * there's a fragment but the prefixed text is empty, we just return a link
//	 * to the fragment.
//	 *
//	 * The result obviously should not be URL-escaped, but does need to be
//	 * HTML-escaped if it's being output in HTML.
//	 *
//	 * @param string|string[] $query
//	 * @param bool $query2
//	 * @param string|int|bool $proto A PROTO_* constant on how the URL should be expanded,
//	 *                               or false (default) for no expansion
//	 * @see self::getLocalURL for the arguments.
//	 * @return string The URL
//	 */
//	public function getLinkURL( $query = '', $query2 = false, $proto = false ) {
//		if ( $this->isExternal() || $proto !== false ) {
//			$ret = $this->getFullURL( $query, $query2, $proto );
//		} elseif ( $this->getPrefixedText() === '' && $this->hasFragment() ) {
//			$ret = $this->getFragmentForURL();
//		} else {
//			$ret = $this->getLocalURL( $query, $query2 ) . $this->getFragmentForURL();
//		}
//		return $ret;
//	}
//
//	/**
//	 * Get the URL form for an internal link.
//	 * - Used in various CDN-related code, in case we have a different
//	 * internal hostname for the server from the exposed one.
//	 *
//	 * This uses $wgInternalServer to qualify the path, or $wgServer
//	 * if $wgInternalServer is not set. If the server variable used is
//	 * protocol-relative, the URL will be expanded to http://
//	 *
//	 * @see self::getLocalURL for the arguments.
//	 * @param string|string[] $query
//	 * @param string|bool $query2 Deprecated
//	 * @return string The URL
//	 */
//	public function getInternalURL( $query = '', $query2 = false ) {
//		global $wgInternalServer, $wgServer;
//		$query = self::fixUrlQueryArgs( $query, $query2 );
//		$server = $wgInternalServer !== false ? $wgInternalServer : $wgServer;
//		$url = wfExpandUrl( $server . $this->getLocalURL( $query ), PROTO_HTTP );
//		// Avoid PHP 7.1 warning from passing $this by reference
//		$titleRef = $this;
//		Hooks::run( 'GetInternalURL', [ &$titleRef, &$url, $query ] );
//		return $url;
//	}
//
//	/**
//	 * Get the URL for a canonical link, for use in things like IRC and
//	 * e-mail notifications. Uses $wgCanonicalServer and the
//	 * GetCanonicalURL hook.
//	 *
//	 * NOTE: Unlike getInternalURL(), the canonical URL includes the fragment
//	 *
//	 * @see self::getLocalURL for the arguments.
//	 * @param string|string[] $query
//	 * @param string|bool $query2 Deprecated
//	 * @return string The URL
//	 * @since 1.18
//	 */
//	public function getCanonicalURL( $query = '', $query2 = false ) {
//		$query = self::fixUrlQueryArgs( $query, $query2 );
//		$url = wfExpandUrl( $this->getLocalURL( $query ) . $this->getFragmentForURL(), PROTO_CANONICAL );
//		// Avoid PHP 7.1 warning from passing $this by reference
//		$titleRef = $this;
//		Hooks::run( 'GetCanonicalURL', [ &$titleRef, &$url, $query ] );
//		return $url;
//	}
//
//	/**
//	 * Get the edit URL for this Title
//	 *
//	 * @return string The URL, or a null string if this is an interwiki link
//	 */
//	public function getEditURL() {
//		if ( $this->isExternal() ) {
//			return '';
//		}
//		$s = $this->getLocalURL( 'action=edit' );
//
//		return $s;
//	}
//
//	/**
//	 * Can $user perform $action on this page?
//	 * This skips potentially expensive cascading permission checks
//	 * as well as avoids expensive error formatting
//	 *
//	 * Suitable for use for nonessential UI controls in common cases, but
//	 * _not_ for functional access control.
//	 *
//	 * May provide false positives, but should never provide a false negative.
//	 *
//	 * @param string $action Action that permission needs to be checked for
//	 * @param User|null $user User to check (since 1.19); $wgUser will be used if not provided.
//	 *
//	 * @return bool
//	 * @throws Exception
//	 *
//	 * @deprecated since 1.33,
//	 * use MediaWikiServices::getInstance()->getPermissionManager()->quickUserCan(..) instead
//	 *
//	 */
//	public function quickUserCan( $action, $user = null ) {
//		return $this->userCan( $action, $user, false );
//	}
//
//	/**
//	 * Can $user perform $action on this page?
//	 *
//	 * @param string $action Action that permission needs to be checked for
//	 * @param User|null $user User to check (since 1.19); $wgUser will be used if not
//	 *   provided.
//	 * @param string $rigor Same format as Title::getUserPermissionsErrors()
//	 *
//	 * @return bool
//	 * @throws Exception
//	 *
//	 * @deprecated since 1.33,
//	 * use MediaWikiServices::getInstance()->getPermissionManager()->userCan(..) instead
//	 *
//	 */
//	public function userCan( $action, $user = null, $rigor = PermissionManager::RIGOR_SECURE ) {
//		if ( !$user instanceof User ) {
//			global $wgUser;
//			$user = $wgUser;
//		}
//
//		// TODO: this is for b/c, eventually will be removed
//		if ( $rigor === true ) {
//			$rigor = PermissionManager::RIGOR_SECURE; // b/c
//		} elseif ( $rigor === false ) {
//			$rigor = PermissionManager::RIGOR_QUICK; // b/c
//		}
//
//		return MediaWikiServices::getInstance()->getPermissionManager()
//			->userCan( $action, $user, $this, $rigor );
//	}
//
//	/**
//	 * Can $user perform $action on this page?
//	 *
//	 * @todo FIXME: This *does not* check throttles (User::pingLimiter()).
//	 *
//	 * @param string $action Action that permission needs to be checked for
//	 * @param User $user User to check
//	 * @param string $rigor One of (quick,full,secure)
//	 *   - quick  : does cheap permission checks from replica DBs (usable for GUI creation)
//	 *   - full   : does cheap and expensive checks possibly from a replica DB
//	 *   - secure : does cheap and expensive checks, using the master as needed
//	 * @param array $ignoreErrors Array of Strings Set this to a list of message keys
//	 *   whose corresponding errors may be ignored.
//	 *
//	 * @return array Array of arrays of the arguments to wfMessage to explain permissions problems.
//	 * @throws Exception
//	 *
//	 * @deprecated since 1.33,
//	 * use MediaWikiServices::getInstance()->getPermissionManager()->getUserPermissionsErrors()
//	 *
//	 */
//	public function getUserPermissionsErrors(
//		$action, $user, $rigor = PermissionManager::RIGOR_SECURE, $ignoreErrors = []
//	) {
//		// TODO: this is for b/c, eventually will be removed
//		if ( $rigor === true ) {
//			$rigor = PermissionManager::RIGOR_SECURE; // b/c
//		} elseif ( $rigor === false ) {
//			$rigor = PermissionManager::RIGOR_QUICK; // b/c
//		}
//
//		return MediaWikiServices::getInstance()->getPermissionManager()
//			->getPermissionErrors( $action, $user, $this, $rigor, $ignoreErrors );
//	}
//
//	/**
//	 * Add the resulting error code to the errors array
//	 *
//	 * @param array $errors List of current errors
//	 * @param array $result Result of errors
//	 *
//	 * @return array List of errors
//	 */
//	private function resultToError( $errors, $result ) {
//		if ( is_array( $result ) && count( $result ) && !is_array( $result[0] ) ) {
//			// A single array representing an error
//			$errors[] = $result;
//		} elseif ( is_array( $result ) && is_array( $result[0] ) ) {
//			// A nested array representing multiple errors
//			$errors = array_merge( $errors, $result );
//		} elseif ( $result !== '' && is_string( $result ) ) {
//			// A string representing a message-id
//			$errors[] = [ $result ];
//		} elseif ( $result instanceof MessageSpecifier ) {
//			// A message specifier representing an error
//			$errors[] = [ $result ];
//		} elseif ( $result === false ) {
//			// a generic "We don't want them to do that"
//			$errors[] = [ 'badaccess-group0' ];
//		}
//		return $errors;
//	}
//
//	/**
//	 * Get a filtered list of all restriction types supported by this wiki.
//	 * @param bool $exists True to get all restriction types that apply to
//	 * titles that do exist, False for all restriction types that apply to
//	 * titles that do not exist
//	 * @return array
//	 */
//	public static function getFilteredRestrictionTypes( $exists = true ) {
//		global $wgRestrictionTypes;
//		$types = $wgRestrictionTypes;
//		if ( $exists ) {
//			# Remove the create restriction for existing titles
//			$types = array_diff( $types, [ 'create' ] );
//		} else {
//			# Only the create and upload restrictions apply to non-existing titles
//				$types = array_intersect( $types, [ 'create', 'upload' ] );
//		}
//		return $types;
//	}
//
//	/**
//	 * Returns restriction types for the current Title
//	 *
//	 * @return array Applicable restriction types
//	 */
//	public function getRestrictionTypes() {
//		if ( $this->isSpecialPage() ) {
//			return [];
//		}
//
//		$types = self::getFilteredRestrictionTypes( $this->exists() );
//
//		if ( $this->mNamespace != NS_FILE ) {
//			# Remove the upload restriction for non-file titles
//				$types = array_diff( $types, [ 'upload' ] );
//		}
//
//		Hooks::run( 'TitleGetRestrictionTypes', [ $this, &$types ] );
//
//		wfDebug( __METHOD__ . ': applicable restrictions to [[' .
//			$this->getPrefixedText() . ']] are {' . implode( ',', $types ) . "}\n" );
//
//		return $types;
//	}
//
//	/**
//	 * Is this title subject to title protection?
//	 * Title protection is the one applied against creation of such title.
//	 *
//	 * @return array|bool An associative array representing any existent title
//	 *   protection, or false if there's none.
//	 */
//	public function getTitleProtection() {
//		$protection = $this->getTitleProtectionInternal();
//		if ( $protection ) {
//			if ( $protection['permission'] == 'sysop' ) {
//				$protection['permission'] = 'editprotected'; // B/C
//			}
//			if ( $protection['permission'] == 'autoconfirmed' ) {
//				$protection['permission'] = 'editsemiprotected'; // B/C
//			}
//		}
//		return $protection;
//	}
//
//	/**
//	 * Fetch title protection settings
//	 *
//	 * To work correctly, $this->loadRestrictions() needs to have access to the
//	 * actual protections in the database without munging 'sysop' =>
//	 * 'editprotected' and 'autoconfirmed' => 'editsemiprotected'. Other
//	 * callers probably want $this->getTitleProtection() instead.
//	 *
//	 * @return array|bool
//	 */
//	protected function getTitleProtectionInternal() {
//		// Can't protect pages in special namespaces
//		if ( $this->mNamespace < 0 ) {
//			return false;
//		}
//
//		// Can't protect pages that exist.
//		if ( $this->exists() ) {
//			return false;
//		}
//
//		if ( $this->mTitleProtection === null ) {
//			$dbr = wfGetDB( DB_REPLICA );
//			$commentStore = CommentStore::getStore();
//			$commentQuery = $commentStore->getJoin( 'pt_reason' );
//			$res = $dbr->select(
//				[ 'protected_titles' ] + $commentQuery['tables'],
//				[
//			'user' => 'pt_user',
//				'expiry' => 'pt_expiry',
//				'permission' => 'pt_create_perm'
//				] + $commentQuery['fields'],
//				[ 'pt_namespace' => $this->mNamespace, 'pt_title' => $this->mDbkeyform ],
//			__METHOD__,
//				[],
//			$commentQuery['joins']
//			);
//
//			// fetchRow returns false if there are no rows.
//			$row = $dbr->fetchRow( $res );
//			if ( $row ) {
//				$this->mTitleProtection = [
//					'user' => $row['user'],
//					'expiry' => $dbr->decodeExpiry( $row['expiry'] ),
//					'permission' => $row['permission'],
//					'reason' => $commentStore->getComment( 'pt_reason', $row )->text,
//				];
//			} else {
//				$this->mTitleProtection = false;
//			}
//		}
//		return $this->mTitleProtection;
//	}
//
//	/**
//	 * Remove any title protection due to page existing
//	 */
//	public function deleteTitleProtection() {
//		$dbw = wfGetDB( DB_MASTER );
//
//		$dbw->delete(
//			'protected_titles',
//			[ 'pt_namespace' => $this->mNamespace, 'pt_title' => $this->mDbkeyform ],
//		__METHOD__
//		);
//		$this->mTitleProtection = false;
//	}
//
//	/**
//	 * Is this page "semi-protected" - the *only* protection levels are listed
//	 * in $wgSemiprotectedRestrictionLevels?
//	 *
//	 * @param string $action Action to check (default: edit)
//	 * @return bool
//	 */
//	public function isSemiProtected( $action = 'edit' ) {
//		global $wgSemiprotectedRestrictionLevels;
//
//		$restrictions = $this->getRestrictions( $action );
//		$semi = $wgSemiprotectedRestrictionLevels;
//		if ( !$restrictions || !$semi ) {
//			// Not protected, or all protection is full protection
//			return false;
//		}
//
//		// Remap autoconfirmed to editsemiprotected for BC
//		foreach ( array_keys( $semi, 'autoconfirmed' ) as $key ) {
//			$semi[$key] = 'editsemiprotected';
//		}
//		foreach ( array_keys( $restrictions, 'autoconfirmed' ) as $key ) {
//			$restrictions[$key] = 'editsemiprotected';
//		}
//
//		return !array_diff( $restrictions, $semi );
//	}
//
//	/**
//	 * Does the title correspond to a protected article?
//	 *
//	 * @param string $action The action the page is protected from,
//	 * by default checks all actions.
//	 * @return bool
//	 */
//	public function isProtected( $action = '' ) {
//		global $wgRestrictionLevels;
//
//		$restrictionTypes = $this->getRestrictionTypes();
//
//		# Special pages have inherent protection
//		if ( $this->isSpecialPage() ) {
//			return true;
//		}
//
//		# Check regular protection levels
//		foreach ( $restrictionTypes as $type ) {
//			if ( $action == $type || $action == '' ) {
//				$r = $this->getRestrictions( $type );
//				foreach ( $wgRestrictionLevels as $level ) {
//					if ( in_array( $level, $r ) && $level != '' ) {
//						return true;
//					}
//				}
//			}
//		}
//
//		return false;
//	}
//
//	/**
//	 * Determines if $user is unable to edit this page because it has been protected
//	 * by $wgNamespaceProtection.
//	 *
//	 * @param User $user User object to check permissions
//	 * @return bool
//	 */
//	public function isNamespaceProtected( User $user ) {
//		global $wgNamespaceProtection;
//
//		if ( isset( $wgNamespaceProtection[$this->mNamespace] ) ) {
//			foreach ( (array)$wgNamespaceProtection[$this->mNamespace] as $right ) {
//				if ( $right != '' && !$user->isAllowed( $right ) ) {
//					return true;
//				}
//			}
//		}
//		return false;
//	}
//
//	/**
//	 * Cascading protection: Return true if cascading restrictions apply to this page, false if not.
//	 *
//	 * @return bool If the page is subject to cascading restrictions.
//	 */
//	public function isCascadeProtected() {
//		list( $sources, /* $restrictions */ ) = $this->getCascadeProtectionSources( false );
//		return ( $sources > 0 );
//	}
//
//	/**
//	 * Determines whether cascading protection sources have already been loaded from
//	 * the database.
//	 *
//	 * @param bool $getPages True to check if the pages are loaded, or false to check
//	 * if the status is loaded.
//	 * @return bool Whether or not the specified information has been loaded
//	 * @since 1.23
//	 */
//	public function areCascadeProtectionSourcesLoaded( $getPages = true ) {
//		return $getPages ? $this->mCascadeSources !== null : $this->mHasCascadingRestrictions !== null;
//	}
//
//	/**
//	 * Cascading protection: Get the source of any cascading restrictions on this page.
//	 *
//	 * @param bool $getPages Whether or not to retrieve the actual pages
//	 *        that the restrictions have come from and the actual restrictions
//	 *        themselves.
//	 * @return array Two elements: First is an array of Title objects of the
//	 *        pages from which cascading restrictions have come, false for
//	 *        none, or true if such restrictions exist but $getPages was not
//	 *        set. Second is an array like that returned by
//	 *        Title::getAllRestrictions(), or an empty array if $getPages is
//	 *        false.
//	 */
//	public function getCascadeProtectionSources( $getPages = true ) {
//		$pagerestrictions = [];
//
//		if ( $this->mCascadeSources !== null && $getPages ) {
//			return [ $this->mCascadeSources, $this->mCascadingRestrictions ];
//		} elseif ( $this->mHasCascadingRestrictions !== null && !$getPages ) {
//			return [ $this->mHasCascadingRestrictions, $pagerestrictions ];
//		}
//
//		$dbr = wfGetDB( DB_REPLICA );
//
//		if ( $this->mNamespace == NS_FILE ) {
//			$tables = [ 'imagelinks', 'page_restrictions' ];
//			$where_clauses = [
//			'il_to' => $this->mDbkeyform,
//				'il_from=pr_page',
//				'pr_cascade' => 1
//			];
//		} else {
//			$tables = [ 'templatelinks', 'page_restrictions' ];
//			$where_clauses = [
//			'tl_namespace' => $this->mNamespace,
//				'tl_title' => $this->mDbkeyform,
//				'tl_from=pr_page',
//				'pr_cascade' => 1
//			];
//		}
//
//		if ( $getPages ) {
//			$cols = [ 'pr_page', 'page_namespace', 'page_title',
//				'pr_expiry', 'pr_type', 'pr_level' ];
//			$where_clauses[] = 'page_id=pr_page';
//			$tables[] = 'page';
//		} else {
//			$cols = [ 'pr_expiry' ];
//		}
//
//		$res = $dbr->select( $tables, $cols, $where_clauses, __METHOD__ );
//
//		$sources = $getPages ? [] : false;
//		$now = wfTimestampNow();
//
//		foreach ( $res as $row ) {
//			$expiry = $dbr->decodeExpiry( $row->pr_expiry );
//			if ( $expiry > $now ) {
//				if ( $getPages ) {
//					$page_id = $row->pr_page;
//					$page_ns = $row->page_namespace;
//					$page_title = $row->page_title;
//					$sources[$page_id] = self::makeTitle( $page_ns, $page_title );
//					# Add groups needed for each restriction type if its not already there
//					# Make sure this restriction type still exists
//
//					if ( !isset( $pagerestrictions[$row->pr_type] ) ) {
//						$pagerestrictions[$row->pr_type] = [];
//					}
//
//					if (
//						isset( $pagerestrictions[$row->pr_type] )
//							&& !in_array( $row->pr_level, $pagerestrictions[$row->pr_type] )
//					) {
//						$pagerestrictions[$row->pr_type][] = $row->pr_level;
//					}
//				} else {
//					$sources = true;
//				}
//			}
//		}
//
//		if ( $getPages ) {
//			$this->mCascadeSources = $sources;
//			$this->mCascadingRestrictions = $pagerestrictions;
//		} else {
//			$this->mHasCascadingRestrictions = $sources;
//		}
//
//		return [ $sources, $pagerestrictions ];
//	}
//
//	/**
//	 * Accessor for mRestrictionsLoaded
//	 *
//	 * @return bool Whether or not the page's restrictions have already been
//	 * loaded from the database
//	 * @since 1.23
//	 */
//	public function areRestrictionsLoaded() {
//		return $this->mRestrictionsLoaded;
//	}
//
//	/**
//	 * Accessor/initialisation for mRestrictions
//	 *
//	 * @param string $action Action that permission needs to be checked for
//	 * @return array Restriction levels needed to take the action. All levels are
//	 *     required. Note that restriction levels are normally user rights, but 'sysop'
//	 *     and 'autoconfirmed' are also allowed for backwards compatibility. These should
//	 *     be mapped to 'editprotected' and 'editsemiprotected' respectively.
//	 */
//	public function getRestrictions( $action ) {
//		if ( !$this->mRestrictionsLoaded ) {
//			$this->loadRestrictions();
//		}
//		return $this->mRestrictions[$action] ?? [];
//	}
//
//	/**
//	 * Accessor/initialisation for mRestrictions
//	 *
//	 * @return array Keys are actions, values are arrays as returned by
//	 *     Title::getRestrictions()
//	 * @since 1.23
//	 */
//	public function getAllRestrictions() {
//		if ( !$this->mRestrictionsLoaded ) {
//			$this->loadRestrictions();
//		}
//		return $this->mRestrictions;
//	}
//
//	/**
//	 * Get the expiry time for the restriction against a given action
//	 *
//	 * @param string $action
//	 * @return string|bool 14-char timestamp, or 'infinity' if the page is protected forever
//	 *     or not protected at all, or false if the action is not recognised.
//	 */
//	public function getRestrictionExpiry( $action ) {
//		if ( !$this->mRestrictionsLoaded ) {
//			$this->loadRestrictions();
//		}
//		return $this->mRestrictionsExpiry[$action] ?? false;
//	}
//
//	/**
//	 * Returns cascading restrictions for the current article
//	 *
//	 * @return bool
//	 */
//	function areRestrictionsCascading() {
//		if ( !$this->mRestrictionsLoaded ) {
//			$this->loadRestrictions();
//		}
//
//		return $this->mCascadeRestriction;
//	}
//
//	/**
//	 * Compiles list of active page restrictions from both page table (pre 1.10)
//	 * and page_restrictions table for this existing page.
//	 * Public for usage by LiquidThreads.
//	 *
//	 * @param array $rows Array of db result objects
//	 * @param string|null $oldFashionedRestrictions Comma-separated set of permission keys
//	 * indicating who can move or edit the page from the page table, (pre 1.10) rows.
//	 * Edit and move sections are separated by a colon
//	 * Example: "edit=autoconfirmed,sysop:move=sysop"
//	 */
//	public function loadRestrictionsFromRows( $rows, $oldFashionedRestrictions = null ) {
//		// This function will only read rows from a table that we migrated away
//		// from before adding READ_LATEST support to loadRestrictions, so we
//		// don't need to support reading from DB_MASTER here.
//		$dbr = wfGetDB( DB_REPLICA );
//
//		$restrictionTypes = $this->getRestrictionTypes();
//
//		foreach ( $restrictionTypes as $type ) {
//			$this->mRestrictions[$type] = [];
//			$this->mRestrictionsExpiry[$type] = 'infinity';
//		}
//
//		$this->mCascadeRestriction = false;
//
//		# Backwards-compatibility: also load the restrictions from the page record (old format).
//		if ( $oldFashionedRestrictions !== null ) {
//			$this->mOldRestrictions = $oldFashionedRestrictions;
//		}
//
//		if ( $this->mOldRestrictions === false ) {
//			$linkCache = MediaWikiServices::getInstance()->getLinkCache();
//			$linkCache->addLinkObj( $this ); # in case we already had an article ID
//				$this->mOldRestrictions = $linkCache->getGoodLinkFieldObj( $this, 'restrictions' );
//		}
//
//		if ( $this->mOldRestrictions != '' ) {
//			foreach ( explode( ':', trim( $this->mOldRestrictions ) ) as $restrict ) {
//				$temp = explode( '=', trim( $restrict ) );
//				if ( count( $temp ) == 1 ) {
//					// old old format should be treated as edit/move restriction
//					$this->mRestrictions['edit'] = explode( ',', trim( $temp[0] ) );
//					$this->mRestrictions['move'] = explode( ',', trim( $temp[0] ) );
//				} else {
//					$restriction = trim( $temp[1] );
//					if ( $restriction != '' ) { // some old entries are empty
//						$this->mRestrictions[$temp[0]] = explode( ',', $restriction );
//					}
//				}
//			}
//		}
//
//		if ( count( $rows ) ) {
//			# Current system - load second to make them override.
//				$now = wfTimestampNow();
//
//			# Cycle through all the restrictions.
//				foreach ( $rows as $row ) {
//				// Don't take care of restrictions types that aren't allowed
//				if ( !in_array( $row->pr_type, $restrictionTypes ) ) {
//					continue;
//				}
//
//				$expiry = $dbr->decodeExpiry( $row->pr_expiry );
//
//				// Only apply the restrictions if they haven't expired!
//				if ( !$expiry || $expiry > $now ) {
//					$this->mRestrictionsExpiry[$row->pr_type] = $expiry;
//					$this->mRestrictions[$row->pr_type] = explode( ',', trim( $row->pr_level ) );
//
//					$this->mCascadeRestriction |= $row->pr_cascade;
//				}
//			}
//		}
//
//		$this->mRestrictionsLoaded = true;
//	}
//
//	/**
//	 * Load restrictions from the page_restrictions table
//	 *
//	 * @param string|null $oldFashionedRestrictions Comma-separated set of permission keys
//	 * indicating who can move or edit the page from the page table, (pre 1.10) rows.
//	 * Edit and move sections are separated by a colon
//	 * Example: "edit=autoconfirmed,sysop:move=sysop"
//	 * @param int $flags A bit field. If self::READ_LATEST is set, skip replicas and read
//	 *  from the master DB.
//	 */
//	public function loadRestrictions( $oldFashionedRestrictions = null, $flags = 0 ) {
//		$readLatest = DBAccessObjectUtils::hasFlags( $flags, self::READ_LATEST );
//		if ( $this->mRestrictionsLoaded && !$readLatest ) {
//			return;
//		}
//
//		// TODO: should probably pass $flags into getArticleID, but it seems hacky
//		// to mix READ_LATEST and GAID_FOR_UPDATE, even if they have the same value.
//		// Maybe deprecate GAID_FOR_UPDATE now that we implement IDBAccessObject?
//		$id = $this->getArticleID();
//		if ( $id ) {
//			$fname = __METHOD__;
//			$loadRestrictionsFromDb = function ( IDatabase $dbr ) use ( $fname, $id ) {
//				return iterator_to_array(
//					$dbr->select(
//						'page_restrictions',
//						[ 'pr_type', 'pr_expiry', 'pr_level', 'pr_cascade' ],
//						[ 'pr_page' => $id ],
//				$fname
//					)
//				);
//			};
//
//			if ( $readLatest ) {
//				$dbr = wfGetDB( DB_MASTER );
//				$rows = $loadRestrictionsFromDb( $dbr );
//			} else {
//				$cache = MediaWikiServices::getInstance()->getMainWANObjectCache();
//				$rows = $cache->getWithSetCallback(
//					// Page protections always leave a new null revision
//					$cache->makeKey( 'page-restrictions', 'v1', $id, $this->getLatestRevID() ),
//					$cache::TTL_DAY,
//					function ( $curValue, &$ttl, array &$setOpts ) use ( $loadRestrictionsFromDb ) {
//					$dbr = wfGetDB( DB_REPLICA );
//
//					$setOpts += Database::getCacheSetOptions( $dbr );
//					$lb = MediaWikiServices::getInstance()->getDBLoadBalancer();
//					if ( $lb->hasOrMadeRecentMasterChanges() ) {
//						// @TODO: cleanup Title cache and caller assumption mess in general
//						$ttl = WANObjectCache::TTL_UNCACHEABLE;
//					}
//
//					return $loadRestrictionsFromDb( $dbr );
//				}
//				);
//			}
//
//			$this->loadRestrictionsFromRows( $rows, $oldFashionedRestrictions );
//		} else {
//			$title_protection = $this->getTitleProtectionInternal();
//
//			if ( $title_protection ) {
//				$now = wfTimestampNow();
//				$expiry = wfGetDB( DB_REPLICA )->decodeExpiry( $title_protection['expiry'] );
//
//				if ( !$expiry || $expiry > $now ) {
//					// Apply the restrictions
//					$this->mRestrictionsExpiry['create'] = $expiry;
//					$this->mRestrictions['create'] =
//						explode( ',', trim( $title_protection['permission'] ) );
//				} else { // Get rid of the old restrictions
//					$this->mTitleProtection = false;
//				}
//			} else {
//				$this->mRestrictionsExpiry['create'] = 'infinity';
//			}
//			$this->mRestrictionsLoaded = true;
//		}
//	}
//
//	/**
//	 * Flush the protection cache in this object and force reload from the database.
//	 * This is used when updating protection from WikiPage::doUpdateRestrictions().
//	 */
//	public function flushRestrictions() {
//		$this->mRestrictionsLoaded = false;
//		$this->mTitleProtection = null;
//	}
//
//	/**
//	 * Purge expired restrictions from the page_restrictions table
//	 *
//	 * This will purge no more than $wgUpdateRowsPerQuery page_restrictions rows
//	 */
//	static function purgeExpiredRestrictions() {
//		if ( wfReadOnly() ) {
//			return;
//		}
//
//		DeferredUpdates::addUpdate( new AtomicSectionUpdate(
//			wfGetDB( DB_MASTER ),
//			__METHOD__,
//			function ( IDatabase $dbw, $fname ) {
//			$config = MediaWikiServices::getInstance()->getMainConfig();
//			$ids = $dbw->selectFieldValues(
//					'page_restrictions',
//						'pr_id',
//						[ 'pr_expiry < ' . $dbw->addQuotes( $dbw->timestamp() ) ],
//			$fname,
//				[ 'LIMIT' => $config->get( 'UpdateRowsPerQuery' ) ] // T135470
//				);
//				if ( $ids ) {
//				$dbw->delete( 'page_restrictions', [ 'pr_id' => $ids ], $fname );
//			}
//		}
//		) );
//
//		DeferredUpdates::addUpdate( new AtomicSectionUpdate(
//			wfGetDB( DB_MASTER ),
//			__METHOD__,
//			function ( IDatabase $dbw, $fname ) {
//			$dbw->delete(
//					'protected_titles',
//						[ 'pt_expiry < ' . $dbw->addQuotes( $dbw->timestamp() ) ],
//			$fname
//				);
//		}
//		) );
//	}
//
//	/**
//	 * Does this have subpages?  (Warning, usually requires an extra DB query.)
//	 *
//	 * @return bool
//	 */
//	public function hasSubpages() {
//		if ( !MWNamespace::hasSubpages( $this->mNamespace ) ) {
//			# Duh
//			return false;
//		}
//
//		# We dynamically add a member variable for the purpose of this method
//		# alone to cache the result.  There's no point in having it hanging
//		# around uninitialized in every Title object; therefore we only add it
//		# if needed and don't declare it statically.
//		if ( $this->mHasSubpages === null ) {
//			$this->mHasSubpages = false;
//			$subpages = $this->getSubpages( 1 );
//			if ( $subpages instanceof TitleArray ) {
//				$this->mHasSubpages = (bool)$subpages->count();
//			}
//		}
//
//		return $this->mHasSubpages;
//	}
//
//	/**
//	 * Get all subpages of this page.
//	 *
//	 * @param int $limit Maximum number of subpages to fetch; -1 for no limit
//	 * @return TitleArray|array TitleArray, or empty array if this page's namespace
//	 *  doesn't allow subpages
//	 */
//	public function getSubpages( $limit = -1 ) {
//		if ( !MWNamespace::hasSubpages( $this->mNamespace ) ) {
//			return [];
//		}
//
//		$dbr = wfGetDB( DB_REPLICA );
//		$conds['page_namespace'] = $this->mNamespace;
//		$conds[] = 'page_title ' . $dbr->buildLike( $this->mDbkeyform . '/', $dbr->anyString() );
//		$options = [];
//		if ( $limit > -1 ) {
//			$options['LIMIT'] = $limit;
//		}
//		return TitleArray::newFromResult(
//			$dbr->select( 'page',
//				[ 'page_id', 'page_namespace', 'page_title', 'page_is_redirect' ],
//		$conds,
//			__METHOD__,
//			$options
//			)
//		);
//	}
//
//	/**
//	 * Is there a version of this page in the deletion archive?
//	 *
//	 * @return int The number of archived revisions
//	 */
//	public function isDeleted() {
//		if ( $this->mNamespace < 0 ) {
//			$n = 0;
//		} else {
//			$dbr = wfGetDB( DB_REPLICA );
//
//			$n = $dbr->selectField( 'archive', 'COUNT(*)',
//				[ 'ar_namespace' => $this->mNamespace, 'ar_title' => $this->mDbkeyform ],
//			__METHOD__
//			);
//			if ( $this->mNamespace == NS_FILE ) {
//				$n += $dbr->selectField( 'filearchive', 'COUNT(*)',
//					[ 'fa_name' => $this->mDbkeyform ],
//				__METHOD__
//				);
//			}
//		}
//		return (int)$n;
//	}
//
//	/**
//	 * Is there a version of this page in the deletion archive?
//	 *
//	 * @return bool
//	 */
//	public function isDeletedQuick() {
//		if ( $this->mNamespace < 0 ) {
//			return false;
//		}
//		$dbr = wfGetDB( DB_REPLICA );
//		$deleted = (bool)$dbr->selectField( 'archive', '1',
//			[ 'ar_namespace' => $this->mNamespace, 'ar_title' => $this->mDbkeyform ],
//		__METHOD__
//		);
//		if ( !$deleted && $this->mNamespace == NS_FILE ) {
//			$deleted = (bool)$dbr->selectField( 'filearchive', '1',
//				[ 'fa_name' => $this->mDbkeyform ],
//			__METHOD__
//			);
//		}
//		return $deleted;
//	}
//
//	/**
//	 * Get the article ID for this Title from the link cache,
//	 * adding it if necessary
//	 *
//	 * @param int $flags A bit field; may be Title::GAID_FOR_UPDATE to select
//	 *  for update
//	 * @return int The ID
//	 */
//	public function getArticleID( $flags = 0 ) {
//		if ( $this->mNamespace < 0 ) {
//			$this->mArticleID = 0;
//			return $this->mArticleID;
//		}
//		$linkCache = MediaWikiServices::getInstance()->getLinkCache();
//		if ( $flags & self::GAID_FOR_UPDATE ) {
//			$oldUpdate = $linkCache->forUpdate( true );
//			$linkCache->clearLink( $this );
//			$this->mArticleID = $linkCache->addLinkObj( $this );
//			$linkCache->forUpdate( $oldUpdate );
//		} elseif ( $this->mArticleID == -1 ) {
//			$this->mArticleID = $linkCache->addLinkObj( $this );
//		}
//		return $this->mArticleID;
//	}
//
//	/**
//	 * Is this an article that is a redirect page?
//	 * Uses link cache, adding it if necessary
//	 *
//	 * @param int $flags A bit field; may be Title::GAID_FOR_UPDATE to select for update
//	 * @return bool
//	 */
//	public function isRedirect( $flags = 0 ) {
//		if ( !is_null( $this->mRedirect ) ) {
//			return $this->mRedirect;
//		}
//		if ( !$this->getArticleID( $flags ) ) {
//			$this->mRedirect = false;
//			return $this->mRedirect;
//		}
//
//		$linkCache = MediaWikiServices::getInstance()->getLinkCache();
//		$linkCache->addLinkObj( $this ); # in case we already had an article ID
//			$cached = $linkCache->getGoodLinkFieldObj( $this, 'redirect' );
//		if ( $cached === null ) {
//			# Trust LinkCache's state over our own
//			# LinkCache is telling us that the page doesn't exist, despite there being cached
//			# data relating to an existing page in $this->mArticleID. Updaters should clear
//			# LinkCache as appropriate, or use $flags = Title::GAID_FOR_UPDATE. If that flag is
//			# set, then LinkCache will definitely be up to date here, since getArticleID() forces
//			# LinkCache to refresh its data from the master.
//			$this->mRedirect = false;
//			return $this->mRedirect;
//		}
//
//		$this->mRedirect = (bool)$cached;
//
//		return $this->mRedirect;
//	}
//
//	/**
//	 * What is the length of this page?
//	 * Uses link cache, adding it if necessary
//	 *
//	 * @param int $flags A bit field; may be Title::GAID_FOR_UPDATE to select for update
//	 * @return int
//	 */
//	public function getLength( $flags = 0 ) {
//		if ( $this->mLength != -1 ) {
//			return $this->mLength;
//		}
//		if ( !$this->getArticleID( $flags ) ) {
//			$this->mLength = 0;
//			return $this->mLength;
//		}
//		$linkCache = MediaWikiServices::getInstance()->getLinkCache();
//		$linkCache->addLinkObj( $this ); # in case we already had an article ID
//			$cached = $linkCache->getGoodLinkFieldObj( $this, 'length' );
//		if ( $cached === null ) {
//			# Trust LinkCache's state over our own, as for isRedirect()
//			$this->mLength = 0;
//			return $this->mLength;
//		}
//
//		$this->mLength = intval( $cached );
//
//		return $this->mLength;
//	}
//
//	/**
//	 * What is the page_latest field for this page?
//	 *
//	 * @param int $flags A bit field; may be Title::GAID_FOR_UPDATE to select for update
//	 * @return int Int or 0 if the page doesn't exist
//	 */
//	public function getLatestRevID( $flags = 0 ) {
//		if ( !( $flags & self::GAID_FOR_UPDATE ) && $this->mLatestID !== false ) {
//			return intval( $this->mLatestID );
//		}
//		if ( !$this->getArticleID( $flags ) ) {
//			$this->mLatestID = 0;
//			return $this->mLatestID;
//		}
//		$linkCache = MediaWikiServices::getInstance()->getLinkCache();
//		$linkCache->addLinkObj( $this ); # in case we already had an article ID
//			$cached = $linkCache->getGoodLinkFieldObj( $this, 'revision' );
//		if ( $cached === null ) {
//			# Trust LinkCache's state over our own, as for isRedirect()
//			$this->mLatestID = 0;
//			return $this->mLatestID;
//		}
//
//		$this->mLatestID = intval( $cached );
//
//		return $this->mLatestID;
//	}
//
//	/**
//	 * This clears some fields in this object, and clears any associated
//	 * keys in the "bad links" section of the link cache.
//	 *
//	 * - This is called from WikiPage::doEditContent() and WikiPage::insertOn() to allow
//	 * loading of the new page_id. It's also called from
//	 * WikiPage::doDeleteArticleReal()
//	 *
//	 * @param int $newid The new Article ID
//	 */
//	public function resetArticleID( $newid ) {
//		$linkCache = MediaWikiServices::getInstance()->getLinkCache();
//		$linkCache->clearLink( $this );
//
//		if ( $newid === false ) {
//			$this->mArticleID = -1;
//		} else {
//			$this->mArticleID = intval( $newid );
//		}
//		$this->mRestrictionsLoaded = false;
//		$this->mRestrictions = [];
//		$this->mOldRestrictions = false;
//		$this->mRedirect = null;
//		$this->mLength = -1;
//		$this->mLatestID = false;
//		$this->mContentModel = false;
//		$this->mEstimateRevisions = null;
//		$this->mPageLanguage = false;
//		$this->mDbPageLanguage = false;
//		$this->mIsBigDeletion = null;
//	}
//
//	public static function clearCaches() {
//		$linkCache = MediaWikiServices::getInstance()->getLinkCache();
//		$linkCache->clear();
//
//		$titleCache = self::getTitleCache();
//		$titleCache->clear();
//	}
//
//	/**
//	 * Capitalize a text string for a title if it belongs to a namespace that capitalizes
//	 *
//	 * @param string $text Containing title to capitalize
//	 * @param int $ns Namespace index, defaults to NS_MAIN
//	 * @return string Containing capitalized title
//	 */
//	public static function capitalize( $text, $ns = NS_MAIN ) {
//		if ( MWNamespace::isCapitalized( $ns ) ) {
//			return MediaWikiServices::getInstance()->getContentLanguage()->ucfirst( $text );
//		} else {
//			return $text;
//		}
//	}
//
//	/**
//	 * Secure and split - main initialisation function for this object
//	 *
//	 * Assumes that mDbkeyform has been set, and is urldecoded
//	 * and uses underscores, but not otherwise munged.  This function
//	 * removes illegal characters, splits off the interwiki and
//	 * namespace prefixes, sets the other forms, and canonicalizes
//	 * everything.
//	 *
//	 * @throws MalformedTitleException On invalid titles
//	 * @return bool True on success
//	 */
//	private function secureAndSplit() {
//		// @note: splitTitleString() is a temporary hack to allow MediaWikiTitleCodec to share
//		//        the parsing code with Title, while avoiding massive refactoring.
//		// @todo: get rid of secureAndSplit, refactor parsing code.
//		// @note: getTitleParser() returns a TitleParser implementation which does not have a
//		//        splitTitleString method, but the only implementation (MediaWikiTitleCodec) does
//		/** @var MediaWikiTitleCodec $titleCodec */
//		$titleCodec = MediaWikiServices::getInstance()->getTitleParser();
//		// MalformedTitleException can be thrown here
//		$parts = $titleCodec->splitTitleString( $this->mDbkeyform, $this->mDefaultNamespace );
//
//		# Fill fields
//		$this->setFragment( '#' . $parts['fragment'] );
//		$this->mInterwiki = $parts['interwiki'];
//		$this->mLocalInterwiki = $parts['local_interwiki'];
//		$this->mNamespace = $parts['namespace'];
//		$this->mUserCaseDBKey = $parts['user_case_dbkey'];
//
//		$this->mDbkeyform = $parts['dbkey'];
//		$this->mUrlform = wfUrlencode( $this->mDbkeyform );
//		$this->mTextform = strtr( $this->mDbkeyform, '_', ' ' );
//
//		# We already know that some pages won't be in the database!
//		if ( $this->isExternal() || $this->isSpecialPage() ) {
//			$this->mArticleID = 0;
//		}
//
//		return true;
//	}
//
//	/**
//	 * Get an array of Title objects linking to this Title
//	 * Also stores the IDs in the link cache.
//	 *
//	 * WARNING: do not use this function on arbitrary user-supplied titles!
//	 * On heavily-used templates it will max out the memory.
//	 *
//	 * @param array $options May be FOR UPDATE
//	 * @param string $table Table name
//	 * @param string $prefix Fields prefix
//	 * @return Title[] Array of Title objects linking here
//	 */
//	public function getLinksTo( $options = [], $table = 'pagelinks', $prefix = 'pl' ) {
//		if ( count( $options ) > 0 ) {
//			$db = wfGetDB( DB_MASTER );
//		} else {
//			$db = wfGetDB( DB_REPLICA );
//		}
//
//		$res = $db->select(
//			[ 'page', $table ],
//		self::getSelectFields(),
//			[
//		"{$prefix}_from=page_id",
//			"{$prefix}_namespace" => $this->mNamespace,
//			"{$prefix}_title" => $this->mDbkeyform ],
//		__METHOD__,
//			$options
//		);
//
//		$retVal = [];
//		if ( $res->numRows() ) {
//			$linkCache = MediaWikiServices::getInstance()->getLinkCache();
//			foreach ( $res as $row ) {
//				$titleObj = self::makeTitle( $row->page_namespace, $row->page_title );
//				if ( $titleObj ) {
//					$linkCache->addGoodLinkObjFromRow( $titleObj, $row );
//					$retVal[] = $titleObj;
//				}
//			}
//		}
//		return $retVal;
//	}
//
//	/**
//	 * Get an array of Title objects using this Title as a template
//	 * Also stores the IDs in the link cache.
//	 *
//	 * WARNING: do not use this function on arbitrary user-supplied titles!
//	 * On heavily-used templates it will max out the memory.
//	 *
//	 * @param array $options Query option to Database::select()
//	 * @return Title[] Array of Title the Title objects linking here
//	 */
//	public function getTemplateLinksTo( $options = [] ) {
//		return $this->getLinksTo( $options, 'templatelinks', 'tl' );
//	}
//
//	/**
//	 * Get an array of Title objects linked from this Title
//	 * Also stores the IDs in the link cache.
//	 *
//	 * WARNING: do not use this function on arbitrary user-supplied titles!
//	 * On heavily-used templates it will max out the memory.
//	 *
//	 * @param array $options Query option to Database::select()
//	 * @param string $table Table name
//	 * @param string $prefix Fields prefix
//	 * @return array Array of Title objects linking here
//	 */
//	public function getLinksFrom( $options = [], $table = 'pagelinks', $prefix = 'pl' ) {
//		$id = $this->getArticleID();
//
//		# If the page doesn't exist; there can't be any link from this page
//		if ( !$id ) {
//			return [];
//		}
//
//		$db = wfGetDB( DB_REPLICA );
//
//		$blNamespace = "{$prefix}_namespace";
//		$blTitle = "{$prefix}_title";
//
//		$pageQuery = WikiPage::getQueryInfo();
//		$res = $db->select(
//			[ $table, 'nestpage' => $pageQuery['tables'] ],
//		array_merge(
//			[ $blNamespace, $blTitle ],
//		$pageQuery['fields']
//			),
//			[ "{$prefix}_from" => $id ],
//		__METHOD__,
//			$options,
//			[ 'nestpage' => [
//		'LEFT JOIN',
//				[ "page_namespace=$blNamespace", "page_title=$blTitle" ]
//			] ] + $pageQuery['joins']
//		);
//
//		$retVal = [];
//		$linkCache = MediaWikiServices::getInstance()->getLinkCache();
//		foreach ( $res as $row ) {
//			if ( $row->page_id ) {
//				$titleObj = self::newFromRow( $row );
//			} else {
//				$titleObj = self::makeTitle( $row->$blNamespace, $row->$blTitle );
//				$linkCache->addBadLinkObj( $titleObj );
//			}
//			$retVal[] = $titleObj;
//		}
//
//		return $retVal;
//	}
//
//	/**
//	 * Get an array of Title objects used on this Title as a template
//	 * Also stores the IDs in the link cache.
//	 *
//	 * WARNING: do not use this function on arbitrary user-supplied titles!
//	 * On heavily-used templates it will max out the memory.
//	 *
//	 * @param array $options May be FOR UPDATE
//	 * @return Title[] Array of Title the Title objects used here
//	 */
//	public function getTemplateLinksFrom( $options = [] ) {
//		return $this->getLinksFrom( $options, 'templatelinks', 'tl' );
//	}
//
//	/**
//	 * Get an array of Title objects referring to non-existent articles linked
//	 * from this page.
//	 *
//	 * @todo check if needed (used only in SpecialBrokenRedirects.php, and
//	 *   should use redirect table in this case).
//	 * @return Title[] Array of Title the Title objects
//	 */
//	public function getBrokenLinksFrom() {
//		if ( $this->getArticleID() == 0 ) {
//			# All links from article ID 0 are false positives
//			return [];
//		}
//
//		$dbr = wfGetDB( DB_REPLICA );
//		$res = $dbr->select(
//			[ 'page', 'pagelinks' ],
//			[ 'pl_namespace', 'pl_title' ],
//			[
//		'pl_from' => $this->getArticleID(),
//			'page_namespace IS NULL'
//			],
//		__METHOD__, [],
//			[
//		'page' => [
//		'LEFT JOIN',
//					[ 'pl_namespace=page_namespace', 'pl_title=page_title' ]
//				]
//			]
//		);
//
//		$retVal = [];
//		foreach ( $res as $row ) {
//			$retVal[] = self::makeTitle( $row->pl_namespace, $row->pl_title );
//		}
//		return $retVal;
//	}
//
//	/**
//	 * Get a list of URLs to purge from the CDN cache when this
//	 * page changes
//	 *
//	 * @return string[] Array of String the URLs
//	 */
//	public function getCdnUrls() {
//		$urls = [
//		$this->getInternalURL(),
//			$this->getInternalURL( 'action=history' )
//		];
//
//		$pageLang = $this->getPageLanguage();
//		if ( $pageLang->hasVariants() ) {
//			$variants = $pageLang->getVariants();
//			foreach ( $variants as $vCode ) {
//				$urls[] = $this->getInternalURL( $vCode );
//			}
//		}
//
//		// If we are looking at a css/js user subpage, purge the action=raw.
//		if ( $this->isUserJsConfigPage() ) {
//			$urls[] = $this->getInternalURL( 'action=raw&ctype=text/javascript' );
//		} elseif ( $this->isUserJsonConfigPage() ) {
//			$urls[] = $this->getInternalURL( 'action=raw&ctype=application/json' );
//		} elseif ( $this->isUserCssConfigPage() ) {
//			$urls[] = $this->getInternalURL( 'action=raw&ctype=text/css' );
//		}
//
//		Hooks::run( 'TitleSquidURLs', [ $this, &$urls ] );
//		return $urls;
//	}
//
//	/**
//	 * Purge all applicable CDN URLs
//	 */
//	public function purgeSquid() {
//		DeferredUpdates::addUpdate(
//			new CdnCacheUpdate( $this->getCdnUrls() ),
//			DeferredUpdates::PRESEND
//		);
//	}
//
//	/**
//	 * Check whether a given move operation would be valid.
//	 * Returns true if ok, or a getUserPermissionsErrors()-like array otherwise
//	 *
//	 * @deprecated since 1.25, use MovePage's methods instead
//	 * @param Title &$nt The new title
//	 * @param bool $auth Whether to check user permissions (uses $wgUser)
//	 * @param string $reason Is the log summary of the move, used for spam checking
//	 * @return array|bool True on success, getUserPermissionsErrors()-like array on failure
//	 */
//	public function isValidMoveOperation( &$nt, $auth = true, $reason = '' ) {
//		global $wgUser;
//
//		if ( !( $nt instanceof Title ) ) {
//			// Normally we'd add this to $errors, but we'll get
//			// lots of syntax errors if $nt is not an object
//			return [ [ 'badtitletext' ] ];
//		}
//
//		$mp = new MovePage( $this, $nt );
//		$errors = $mp->isValidMove()->getErrorsArray();
//		if ( $auth ) {
//			$errors = wfMergeErrorArrays(
//				$errors,
//				$mp->checkPermissions( $wgUser, $reason )->getErrorsArray()
//			);
//		}
//
//		return $errors ?: true;
//	}
//
//	/**
//	 * Move a title to a new location
//	 *
//	 * @deprecated since 1.25, use the MovePage class instead
//	 * @param Title &$nt The new title
//	 * @param bool $auth Indicates whether $wgUser's permissions
//	 *  should be checked
//	 * @param string $reason The reason for the move
//	 * @param bool $createRedirect Whether to create a redirect from the old title to the new title.
//	 *  Ignored if the user doesn't have the suppressredirect right.
//	 * @param array $changeTags Applied to the entry in the move log and redirect page revision
//	 * @return array|bool True on success, getUserPermissionsErrors()-like array on failure
//	 */
//	public function moveTo( &$nt, $auth = true, $reason = '', $createRedirect = true,
//							array $changeTags = []
//	) {
//		global $wgUser;
//		$err = $this->isValidMoveOperation( $nt, $auth, $reason );
//		if ( is_array( $err ) ) {
//			// Auto-block user's IP if the account was "hard" blocked
//			$wgUser->spreadAnyEditBlock();
//			return $err;
//		}
//		// Check suppressredirect permission
//		if ( $auth && !$wgUser->isAllowed( 'suppressredirect' ) ) {
//			$createRedirect = true;
//		}
//
//		$mp = new MovePage( $this, $nt );
//		$status = $mp->move( $wgUser, $reason, $createRedirect, $changeTags );
//		if ( $status->isOK() ) {
//			return true;
//		} else {
//			return $status->getErrorsArray();
//		}
//	}
//
//	/**
//	 * Move this page's subpages to be subpages of $nt
//	 *
//	 * @param Title $nt Move target
//	 * @param bool $auth Whether $wgUser's permissions should be checked
//	 * @param string $reason The reason for the move
//	 * @param bool $createRedirect Whether to create redirects from the old subpages to
//	 *     the new ones Ignored if the user doesn't have the 'suppressredirect' right
//	 * @param array $changeTags Applied to the entry in the move log and redirect page revision
//	 * @return array Array with old page titles as keys, and strings (new page titles) or
//	 *     getUserPermissionsErrors()-like arrays (errors) as values, or a
//	 *     getUserPermissionsErrors()-like error array with numeric indices if
//	 *     no pages were moved
//	 */
//	public function moveSubpages( $nt, $auth = true, $reason = '', $createRedirect = true,
//								  array $changeTags = []
//	) {
//		global $wgMaximumMovedPages;
//		// Check permissions
//		if ( !$this->userCan( 'move-subpages' ) ) {
//			return [
//				[ 'cant-move-subpages' ],
//			];
//		}
//		// Do the source and target namespaces support subpages?
//		if ( !MWNamespace::hasSubpages( $this->mNamespace ) ) {
//			return [
//				[ 'namespace-nosubpages', MWNamespace::getCanonicalName( $this->mNamespace ) ],
//			];
//		}
//		if ( !MWNamespace::hasSubpages( $nt->getNamespace() ) ) {
//			return [
//				[ 'namespace-nosubpages', MWNamespace::getCanonicalName( $nt->getNamespace() ) ],
//			];
//		}
//
//		$subpages = $this->getSubpages( $wgMaximumMovedPages + 1 );
//		$retval = [];
//		$count = 0;
//		foreach ( $subpages as $oldSubpage ) {
//			$count++;
//			if ( $count > $wgMaximumMovedPages ) {
//				$retval[$oldSubpage->getPrefixedText()] = [
//					[ 'movepage-max-pages', $wgMaximumMovedPages ],
//				];
//				break;
//			}
//
//			// We don't know whether this function was called before
//			// or after moving the root page, so check both
//			// $this and $nt
//			if ( $oldSubpage->getArticleID() == $this->getArticleID()
//				|| $oldSubpage->getArticleID() == $nt->getArticleID()
//			) {
//				// When moving a page to a subpage of itself,
//				// don't move it twice
//				continue;
//			}
//			$newPageName = preg_replace(
//				'#^' . preg_quote( $this->mDbkeyform, '#' ) . '#',
//				StringUtils::escapeRegexReplacement( $nt->getDBkey() ), # T23234
//			$oldSubpage->getDBkey() );
//			if ( $oldSubpage->isTalkPage() ) {
//				$newNs = $nt->getTalkPage()->getNamespace();
//			} else {
//				$newNs = $nt->getSubjectPage()->getNamespace();
//			}
//			# T16385: we need makeTitleSafe because the new page names may
//			# be longer than 255 characters.
//				$newSubpage = self::makeTitleSafe( $newNs, $newPageName );
//
//			$success = $oldSubpage->moveTo( $newSubpage, $auth, $reason, $createRedirect, $changeTags );
//			if ( $success === true ) {
//				$retval[$oldSubpage->getPrefixedText()] = $newSubpage->getPrefixedText();
//			} else {
//				$retval[$oldSubpage->getPrefixedText()] = $success;
//			}
//		}
//		return $retval;
//	}
//
//	/**
//	 * Checks if this page is just a one-rev redirect.
//	 * Adds lock, so don't use just for light purposes.
//	 *
//	 * @return bool
//	 */
//	public function isSingleRevRedirect() {
//		global $wgContentHandlerUseDB;
//
//		$dbw = wfGetDB( DB_MASTER );
//
//		# Is it a redirect?
//		$fields = [ 'page_is_redirect', 'page_latest', 'page_id' ];
//		if ( $wgContentHandlerUseDB ) {
//			$fields[] = 'page_content_model';
//		}
//
//		$row = $dbw->selectRow( 'page',
//			$fields,
//			$this->pageCond(),
//			__METHOD__,
//			[ 'FOR UPDATE' ]
//		);
//		# Cache some fields we may want
//		$this->mArticleID = $row ? intval( $row->page_id ) : 0;
//		$this->mRedirect = $row ? (bool)$row->page_is_redirect : false;
//		$this->mLatestID = $row ? intval( $row->page_latest ) : false;
//		$this->mContentModel = $row && isset( $row->page_content_model )
//			? strval( $row->page_content_model )
//			: false;
//
//		if ( !$this->mRedirect ) {
//			return false;
//		}
//		# Does the article have a history?
//		$row = $dbw->selectField( [ 'page', 'revision' ],
//		'rev_id',
//			[ 'page_namespace' => $this->mNamespace,
//			'page_title' => $this->mDbkeyform,
//			'page_id=rev_page',
//			'page_latest != rev_id'
//			],
//		__METHOD__,
//			[ 'FOR UPDATE' ]
//		);
//		# Return true if there was no history
//		return ( $row === false );
//	}
//
//	/**
//	 * Checks if $this can be moved to a given Title
//	 * - Selects for update, so don't call it unless you mean business
//	 *
//	 * @deprecated since 1.25, use MovePage's methods instead
//	 * @param Title $nt The new title to check
//	 * @return bool
//	 */
//	public function isValidMoveTarget( $nt ) {
//		# Is it an existing file?
//		if ( $nt->getNamespace() == NS_FILE ) {
//			$file = wfLocalFile( $nt );
//			$file->load( File::READ_LATEST );
//			if ( $file->exists() ) {
//				wfDebug( __METHOD__ . ": file exists\n" );
//				return false;
//			}
//		}
//		# Is it a redirect with no history?
//		if ( !$nt->isSingleRevRedirect() ) {
//			wfDebug( __METHOD__ . ": not a one-rev redirect\n" );
//			return false;
//		}
//		# Get the article text
//		$rev = Revision::newFromTitle( $nt, false, Revision::READ_LATEST );
//		if ( !is_object( $rev ) ) {
//			return false;
//		}
//		$content = $rev->getContent();
//		# Does the redirect point to the source?
//		# Or is it a broken self-redirect, usually caused by namespace collisions?
//		$redirTitle = $content ? $content->getRedirectTarget() : null;
//
//		if ( $redirTitle ) {
//			if ( $redirTitle->getPrefixedDBkey() != $this->getPrefixedDBkey() &&
//				$redirTitle->getPrefixedDBkey() != $nt->getPrefixedDBkey() ) {
//				wfDebug( __METHOD__ . ": redirect points to other page\n" );
//				return false;
//			} else {
//				return true;
//			}
//		} else {
//			# Fail safe (not a redirect after all. strange.)
//			wfDebug( __METHOD__ . ": failsafe: database sais " . $nt->getPrefixedDBkey() .
//			" is a redirect, but it doesn't contain a valid redirect.\n" );
//			return false;
//		}
//	}
//
//	/**
//	 * Get categories to which this Title belongs and return an array of
//	 * categories' names.
//	 *
//	 * @return array Array of parents in the form:
//	 *     $parent => $currentarticle
//	 */
//	public function getParentCategories() {
//		$data = [];
//
//		$titleKey = $this->getArticleID();
//
//		if ( $titleKey === 0 ) {
//			return $data;
//		}
//
//		$dbr = wfGetDB( DB_REPLICA );
//
//		$res = $dbr->select(
//			'categorylinks',
//			'cl_to',
//			[ 'cl_from' => $titleKey ],
//		__METHOD__
//		);
//
//		if ( $res->numRows() > 0 ) {
//			$contLang = MediaWikiServices::getInstance()->getContentLanguage();
//			foreach ( $res as $row ) {
//				// $data[] = Title::newFromText( $contLang->getNsText ( NS_CATEGORY ).':'.$row->cl_to);
//				$data[$contLang->getNsText( NS_CATEGORY ) . ':' . $row->cl_to] =
//				$this->getFullText();
//			}
//		}
//		return $data;
//	}
//
//	/**
//	 * Get a tree of parent categories
//	 *
//	 * @param array $children Array with the children in the keys, to check for circular refs
//	 * @return array Tree of parent categories
//	 */
//	public function getParentCategoryTree( $children = [] ) {
//		$stack = [];
//		$parents = $this->getParentCategories();
//
//		if ( $parents ) {
//			foreach ( $parents as $parent => $current ) {
//				if ( array_key_exists( $parent, $children ) ) {
//					# Circular reference
//					$stack[$parent] = [];
//				} else {
//					$nt = self::newFromText( $parent );
//					if ( $nt ) {
//						$stack[$parent] = $nt->getParentCategoryTree( $children + [ $parent => 1 ] );
//					}
//				}
//			}
//		}
//
//		return $stack;
//	}
//
//	/**
//	 * Get an associative array for selecting this title from
//	 * the "page" table
//	 *
//	 * @return array Array suitable for the $where parameter of DB::select()
//	 */
//	public function pageCond() {
//		if ( $this->mArticleID > 0 ) {
//			// PK avoids secondary lookups in InnoDB, shouldn't hurt other DBs
//			return [ 'page_id' => $this->mArticleID ];
//		} else {
//			return [ 'page_namespace' => $this->mNamespace, 'page_title' => $this->mDbkeyform ];
//		}
//	}
//
//	/**
//	 * Get next/previous revision ID relative to another revision ID
//	 * @param int $revId Revision ID. Get the revision that was before this one.
//	 * @param int $flags Title::GAID_FOR_UPDATE
//	 * @param string $dir 'next' or 'prev'
//	 * @return int|bool New revision ID, or false if none exists
//	 */
//	private function getRelativeRevisionID( $revId, $flags, $dir ) {
//		$revId = (int)$revId;
//		if ( $dir === 'next' ) {
//			$op = '>';
//			$sort = 'ASC';
//		} elseif ( $dir === 'prev' ) {
//			$op = '<';
//			$sort = 'DESC';
//		} else {
//			throw new InvalidArgumentException( '$dir must be "next" or "prev"' );
//		}
//
//		if ( $flags & self::GAID_FOR_UPDATE ) {
//			$db = wfGetDB( DB_MASTER );
//		} else {
//			$db = wfGetDB( DB_REPLICA, 'contributions' );
//		}
//
//		// Intentionally not caring if the specified revision belongs to this
//		// page. We only care about the timestamp.
//		$ts = $db->selectField( 'revision', 'rev_timestamp', [ 'rev_id' => $revId ], __METHOD__ );
//		if ( $ts === false ) {
//			$ts = $db->selectField( 'archive', 'ar_timestamp', [ 'ar_rev_id' => $revId ], __METHOD__ );
//			if ( $ts === false ) {
//				// Or should this throw an InvalidArgumentException or something?
//				return false;
//			}
//		}
//		$ts = $db->addQuotes( $ts );
//
//		$revId = $db->selectField( 'revision', 'rev_id',
//			[
//			'rev_page' => $this->getArticleID( $flags ),
//			"rev_timestamp $op $ts OR (rev_timestamp = $ts AND rev_id $op $revId)"
//			],
//		__METHOD__,
//			[
//		'ORDER BY' => "rev_timestamp $sort, rev_id $sort",
//			'IGNORE INDEX' => 'rev_timestamp', // Probably needed for T159319
//			]
//		);
//
//		if ( $revId === false ) {
//			return false;
//		} else {
//			return intval( $revId );
//		}
//	}
//
//	/**
//	 * Get the revision ID of the previous revision
//	 *
//	 * @param int $revId Revision ID. Get the revision that was before this one.
//	 * @param int $flags Title::GAID_FOR_UPDATE
//	 * @return int|bool Old revision ID, or false if none exists
//	 */
//	public function getPreviousRevisionID( $revId, $flags = 0 ) {
//		return $this->getRelativeRevisionID( $revId, $flags, 'prev' );
//	}
//
//	/**
//	 * Get the revision ID of the next revision
//	 *
//	 * @param int $revId Revision ID. Get the revision that was after this one.
//	 * @param int $flags Title::GAID_FOR_UPDATE
//	 * @return int|bool Next revision ID, or false if none exists
//	 */
//	public function getNextRevisionID( $revId, $flags = 0 ) {
//		return $this->getRelativeRevisionID( $revId, $flags, 'next' );
//	}
//
//	/**
//	 * Get the first revision of the page
//	 *
//	 * @param int $flags Title::GAID_FOR_UPDATE
//	 * @return Revision|null If page doesn't exist
//	 */
//	public function getFirstRevision( $flags = 0 ) {
//		$pageId = $this->getArticleID( $flags );
//		if ( $pageId ) {
//			$db = ( $flags & self::GAID_FOR_UPDATE ) ? wfGetDB( DB_MASTER ) : wfGetDB( DB_REPLICA );
//			$revQuery = Revision::getQueryInfo();
//			$row = $db->selectRow( $revQuery['tables'], $revQuery['fields'],
//				[ 'rev_page' => $pageId ],
//			__METHOD__,
//				[
//			'ORDER BY' => 'rev_timestamp ASC, rev_id ASC',
//				'IGNORE INDEX' => [ 'revision' => 'rev_timestamp' ], // See T159319
//				],
//			$revQuery['joins']
//			);
//			if ( $row ) {
//				return new Revision( $row, 0, $this );
//			}
//		}
//		return null;
//	}
//
//	/**
//	 * Get the oldest revision timestamp of this page
//	 *
//	 * @param int $flags Title::GAID_FOR_UPDATE
//	 * @return string|null MW timestamp
//	 */
//	public function getEarliestRevTime( $flags = 0 ) {
//		$rev = $this->getFirstRevision( $flags );
//		return $rev ? $rev->getTimestamp() : null;
//	}
//
//	/**
//	 * Check if this is a new page
//	 *
//	 * @return bool
//	 */
//	public function isNewPage() {
//		$dbr = wfGetDB( DB_REPLICA );
//		return (bool)$dbr->selectField( 'page', 'page_is_new', $this->pageCond(), __METHOD__ );
//	}
//
//	/**
//	 * Check whether the number of revisions of this page surpasses $wgDeleteRevisionsLimit
//	 *
//	 * @return bool
//	 */
//	public function isBigDeletion() {
//		global $wgDeleteRevisionsLimit;
//
//		if ( !$wgDeleteRevisionsLimit ) {
//			return false;
//		}
//
//		if ( $this->mIsBigDeletion === null ) {
//			$dbr = wfGetDB( DB_REPLICA );
//
//			$revCount = $dbr->selectRowCount(
//				'revision',
//				'1',
//				[ 'rev_page' => $this->getArticleID() ],
//			__METHOD__,
//				[ 'LIMIT' => $wgDeleteRevisionsLimit + 1 ]
//			);
//
//			$this->mIsBigDeletion = $revCount > $wgDeleteRevisionsLimit;
//		}
//
//		return $this->mIsBigDeletion;
//	}
//
//	/**
//	 * Get the approximate revision count of this page.
//	 *
//	 * @return int
//	 */
//	public function estimateRevisionCount() {
//		if ( !$this->exists() ) {
//			return 0;
//		}
//
//		if ( $this->mEstimateRevisions === null ) {
//			$dbr = wfGetDB( DB_REPLICA );
//			$this->mEstimateRevisions = $dbr->estimateRowCount( 'revision', '*',
//				[ 'rev_page' => $this->getArticleID() ], __METHOD__ );
//		}
//
//		return $this->mEstimateRevisions;
//	}
//
//	/**
//	 * Get the number of revisions between the given revision.
//	 * Used for diffs and other things that really need it.
//	 *
//	 * @param int|Revision $old Old revision or rev ID (first before range)
//	 * @param int|Revision $new New revision or rev ID (first after range)
//	 * @param int|null $max Limit of Revisions to count, will be incremented to detect truncations
//	 * @return int Number of revisions between these revisions.
//	 */
//	public function countRevisionsBetween( $old, $new, $max = null ) {
//		if ( !( $old instanceof Revision ) ) {
//			$old = Revision::newFromTitle( $this, (int)$old );
//		}
//		if ( !( $new instanceof Revision ) ) {
//			$new = Revision::newFromTitle( $this, (int)$new );
//		}
//		if ( !$old || !$new ) {
//			return 0; // nothing to compare
//		}
//		$dbr = wfGetDB( DB_REPLICA );
//		$conds = [
//		'rev_page' => $this->getArticleID(),
//			'rev_timestamp > ' . $dbr->addQuotes( $dbr->timestamp( $old->getTimestamp() ) ),
//			'rev_timestamp < ' . $dbr->addQuotes( $dbr->timestamp( $new->getTimestamp() ) )
//		];
//		if ( $max !== null ) {
//			return $dbr->selectRowCount( 'revision', '1',
//				$conds,
//				__METHOD__,
//				[ 'LIMIT' => $max + 1 ] // extra to detect truncation
//			);
//		} else {
//			return (int)$dbr->selectField( 'revision', 'count(*)', $conds, __METHOD__ );
//		}
//	}
//
//	/**
//	 * Get the authors between the given revisions or revision IDs.
//	 * Used for diffs and other things that really need it.
//	 *
//	 * @since 1.23
//	 *
//	 * @param int|Revision $old Old revision or rev ID (first before range by default)
//	 * @param int|Revision $new New revision or rev ID (first after range by default)
//	 * @param int $limit Maximum number of authors
//	 * @param string|array $options (Optional): Single option, or an array of options:
//	 *     'include_old' Include $old in the range; $new is excluded.
//	 *     'include_new' Include $new in the range; $old is excluded.
//	 *     'include_both' Include both $old and $new in the range.
//	 *     Unknown option values are ignored.
//	 * @return array|null Names of revision authors in the range; null if not both revisions exist
//	 */
//	public function getAuthorsBetween( $old, $new, $limit, $options = [] ) {
//		if ( !( $old instanceof Revision ) ) {
//			$old = Revision::newFromTitle( $this, (int)$old );
//		}
//		if ( !( $new instanceof Revision ) ) {
//			$new = Revision::newFromTitle( $this, (int)$new );
//		}
//		// XXX: what if Revision objects are passed in, but they don't refer to this title?
//		// Add $old->getPage() != $new->getPage() || $old->getPage() != $this->getArticleID()
//		// in the sanity check below?
//		if ( !$old || !$new ) {
//			return null; // nothing to compare
//		}
//		$authors = [];
//		$old_cmp = '>';
//		$new_cmp = '<';
//		$options = (array)$options;
//		if ( in_array( 'include_old', $options ) ) {
//			$old_cmp = '>=';
//		}
//		if ( in_array( 'include_new', $options ) ) {
//			$new_cmp = '<=';
//		}
//		if ( in_array( 'include_both', $options ) ) {
//			$old_cmp = '>=';
//			$new_cmp = '<=';
//		}
//		// No DB query needed if $old and $new are the same or successive revisions:
//		if ( $old->getId() === $new->getId() ) {
//			return ( $old_cmp === '>' && $new_cmp === '<' ) ?
//				[] :
//				[ $old->getUserText( Revision::RAW ) ];
//		} elseif ( $old->getId() === $new->getParentId() ) {
//			if ( $old_cmp === '>=' && $new_cmp === '<=' ) {
//				$authors[] = $old->getUserText( Revision::RAW );
//				if ( $old->getUserText( Revision::RAW ) != $new->getUserText( Revision::RAW ) ) {
//					$authors[] = $new->getUserText( Revision::RAW );
//				}
//			} elseif ( $old_cmp === '>=' ) {
//				$authors[] = $old->getUserText( Revision::RAW );
//			} elseif ( $new_cmp === '<=' ) {
//				$authors[] = $new->getUserText( Revision::RAW );
//			}
//			return $authors;
//		}
//		$dbr = wfGetDB( DB_REPLICA );
//		$revQuery = Revision::getQueryInfo();
//		$authors = $dbr->selectFieldValues(
//			$revQuery['tables'],
//			$revQuery['fields']['rev_user_text'],
//			[
//			'rev_page' => $this->getArticleID(),
//			"rev_timestamp $old_cmp " . $dbr->addQuotes( $dbr->timestamp( $old->getTimestamp() ) ),
//			"rev_timestamp $new_cmp " . $dbr->addQuotes( $dbr->timestamp( $new->getTimestamp() ) )
//			], __METHOD__,
//			[ 'DISTINCT', 'LIMIT' => $limit + 1 ], // add one so caller knows it was truncated
//		$revQuery['joins']
//		);
//		return $authors;
//	}
//
//	/**
//	 * Get the number of authors between the given revisions or revision IDs.
//	 * Used for diffs and other things that really need it.
//	 *
//	 * @param int|Revision $old Old revision or rev ID (first before range by default)
//	 * @param int|Revision $new New revision or rev ID (first after range by default)
//	 * @param int $limit Maximum number of authors
//	 * @param string|array $options (Optional): Single option, or an array of options:
//	 *     'include_old' Include $old in the range; $new is excluded.
//	 *     'include_new' Include $new in the range; $old is excluded.
//	 *     'include_both' Include both $old and $new in the range.
//	 *     Unknown option values are ignored.
//	 * @return int Number of revision authors in the range; zero if not both revisions exist
//	 */
//	public function countAuthorsBetween( $old, $new, $limit, $options = [] ) {
//		$authors = $this->getAuthorsBetween( $old, $new, $limit, $options );
//		return $authors ? count( $authors ) : 0;
//	}
//
//	/**
//	 * Compare with another title.
//	 *
//	 * @param Title $title
//	 * @return bool
//	 */
//	public function equals( Title $title ) {
//		// Note: === is necessary for proper matching of number-like titles.
//		return $this->mInterwiki === $title->mInterwiki
//			&& $this->mNamespace == $title->mNamespace
//			&& $this->mDbkeyform === $title->mDbkeyform;
//	}
//
//	/**
//	 * Check if this title is a subpage of another title
//	 *
//	 * @param Title $title
//	 * @return bool
//	 */
//	public function isSubpageOf( Title $title ) {
//		return $this->mInterwiki === $title->mInterwiki
//			&& $this->mNamespace == $title->mNamespace
//			&& strpos( $this->mDbkeyform, $title->mDbkeyform . '/' ) === 0;
//	}
//
//	/**
//	 * Check if page exists.  For historical reasons, this function simply
//	 * checks for the existence of the title in the page table, and will
//	 * thus return false for interwiki links, special pages and the like.
//	 * If you want to know if a title can be meaningfully viewed, you should
//	 * probably call the isKnown() method instead.
//	 *
//	 * @param int $flags An optional bit field; may be Title::GAID_FOR_UPDATE to check
//	 *   from master/for update
//	 * @return bool
//	 */
//	public function exists( $flags = 0 ) {
//		$exists = $this->getArticleID( $flags ) != 0;
//		Hooks::run( 'TitleExists', [ $this, &$exists ] );
//		return $exists;
//	}
//
//	/**
//	 * Should links to this title be shown as potentially viewable (i.e. as
//	 * "bluelinks"), even if there's no record by this title in the page
//	 * table?
//	 *
//	 * This function is semi-deprecated for public use, as well as somewhat
//	 * misleadingly named.  You probably just want to call isKnown(), which
//	 * calls this function internally.
//	 *
//	 * (ISSUE: Most of these checks are cheap, but the file existence check
//	 * can potentially be quite expensive.  Including it here fixes a lot of
//	 * existing code, but we might want to add an optional parameter to skip
//	 * it and any other expensive checks.)
//	 *
//	 * @return bool
//	 */
//	public function isAlwaysKnown() {
//		$isKnown = null;
//
//		/**
//		 * Allows overriding default behavior for determining if a page exists.
//		 * If $isKnown is kept as null, regular checks happen. If it's
//		 * a boolean, this value is returned by the isKnown method.
//		 *
//		 * @since 1.20
//		 *
//		 * @param Title $title
//		 * @param bool|null $isKnown
//		 */
//		Hooks::run( 'TitleIsAlwaysKnown', [ $this, &$isKnown ] );
//
//		if ( !is_null( $isKnown ) ) {
//			return $isKnown;
//		}
//
//		if ( $this->isExternal() ) {
//			return true; // any interwiki link might be viewable, for all we know
//		}
//
//		switch ( $this->mNamespace ) {
//			case NS_MEDIA:
//			case NS_FILE:
//				// file exists, possibly in a foreign repo
//				return (bool)wfFindFile( $this );
//			case NS_SPECIAL:
//				// valid special page
//				return MediaWikiServices::getInstance()->getSpecialPageFactory()->
//			exists( $this->mDbkeyform );
//			case NS_MAIN:
//				// selflink, possibly with fragment
//				return $this->mDbkeyform == '';
//			case NS_MEDIAWIKI:
//				// known system message
//				return $this->hasSourceText() !== false;
//			default:
//				return false;
//		}
//	}
//
//	/**
//	 * Does this title refer to a page that can (or might) be meaningfully
//	 * viewed?  In particular, this function may be used to determine if
//	 * links to the title should be rendered as "bluelinks" (as opposed to
//	 * "redlinks" to non-existent pages).
//	 * Adding something else to this function will cause inconsistency
//	 * since LinkHolderArray calls isAlwaysKnown() and does its own
//	 * page existence check.
//	 *
//	 * @return bool
//	 */
//	public function isKnown() {
//		return $this->isAlwaysKnown() || $this->exists();
//	}
//
//	/**
//	 * Does this page have source text?
//	 *
//	 * @return bool
//	 */
//	public function hasSourceText() {
//		if ( $this->exists() ) {
//			return true;
//		}
//
//		if ( $this->mNamespace == NS_MEDIAWIKI ) {
//			// If the page doesn't exist but is a known system message, default
//			// message content will be displayed, same for language subpages-
//			// Use always content language to avoid loading hundreds of languages
//			// to get the link color.
//			$contLang = MediaWikiServices::getInstance()->getContentLanguage();
//			list( $name, ) = MessageCache::singleton()->figureMessage(
//				$contLang->lcfirst( $this->getText() )
//			);
//			$message = wfMessage( $name )->inLanguage( $contLang )->useDatabase( false );
//			return $message->exists();
//		}
//
//		return false;
//	}
//
//	/**
//	 * Get the default (plain) message contents for an page that overrides an
//	 * interface message key.
//	 *
//	 * Primary use cases:
//	 *
//	 * - Article:
//	 *    - Show default when viewing the page. The Article::getSubstituteContent
//	 *      method displays the default message content, instead of the
//	 *      'noarticletext' placeholder message normally used.
//	 *
//	 * - EditPage:
//	 *    - Title of edit page. When creating an interface message override,
//	 *      the editor is told they are "Editing the page", instead of
//	 *      "Creating the page". (EditPage::setHeaders)
//	 *    - Edit notice. The 'translateinterface' edit notice is shown when creating
//	 *      or editing a an interface message override. (EditPage::showIntro)
//	 *    - Opening the editor. The contents of the localisation message are used
//	 *      as contents of the editor when creating a new page in the MediaWiki
//	 *      namespace. This simplifies the process for editors when "changing"
//	 *      an interface message by creating an override. (EditPage::getContentObject)
//	 *    - Showing a diff. The left-hand side of a diff when an editor is
//	 *      previewing their changes before saving the creation of a page in the
//	 *      MediaWiki namespace. (EditPage::showDiff)
//	 *    - Disallowing a save. When attempting to create a a MediaWiki-namespace
//	 *      page with the proposed content matching the interface message default,
//	 *      the save is rejected, the same way we disallow blank pages from being
//	 *      created. (EditPage::internalAttemptSave)
//	 *
//	 * - ApiEditPage:
//	 *    - Default content, when using the 'prepend' or 'append' feature.
//	 *
//	 * - SkinTemplate:
//	 *    - Label the create action as "Edit", if the page can be an override.
//	 *
//	 * @return string|bool
//	 */
//	public function getDefaultMessageText() {
//		if ( $this->mNamespace != NS_MEDIAWIKI ) { // Just in case
//			return false;
//		}
//
//		list( $name, $lang ) = MessageCache::singleton()->figureMessage(
//			MediaWikiServices::getInstance()->getContentLanguage()->lcfirst( $this->getText() )
//		);
//		$message = wfMessage( $name )->inLanguage( $lang )->useDatabase( false );
//
//		if ( $message->exists() ) {
//			return $message->plain();
//		} else {
//			return false;
//		}
//	}
//
//	/**
//	 * Updates page_touched for this page; called from LinksUpdate.php
//	 *
//	 * @param string|null $purgeTime [optional] TS_MW timestamp
//	 * @return bool True if the update succeeded
//	 */
//	public function invalidateCache( $purgeTime = null ) {
//		if ( wfReadOnly() ) {
//			return false;
//		} elseif ( $this->mArticleID === 0 ) {
//			return true; // avoid gap locking if we know it's not there
//		}
//
//		$dbw = wfGetDB( DB_MASTER );
//		$dbw->onTransactionPreCommitOrIdle(
//			function () use ( $dbw ) {
//			ResourceLoaderWikiModule::invalidateModuleCache(
//				$this, null, null, $dbw->getDomainID() );
//		},
//		__METHOD__
//		);
//
//		$conds = $this->pageCond();
//		DeferredUpdates::addUpdate(
//			new AutoCommitUpdate(
//				$dbw,
//				__METHOD__,
//				function ( IDatabase $dbw, $fname ) use ( $conds, $purgeTime ) {
//				$dbTimestamp = $dbw->timestamp( $purgeTime ?: time() );
//				$dbw->update(
//						'page',
//							[ 'page_touched' => $dbTimestamp ],
//						$conds + [ 'page_touched < ' . $dbw->addQuotes( $dbTimestamp ) ],
//				$fname
//					);
//				MediaWikiServices::getInstance()->getLinkCache()->invalidateTitle( $this );
//			}
//		),
//			DeferredUpdates::PRESEND
//		);
//
//		return true;
//	}
//
//	/**
//	 * Update page_touched timestamps and send CDN purge messages for
//	 * pages linking to this title. May be sent to the job queue depending
//	 * on the number of links. Typically called on create and delete.
//	 */
//	public function touchLinks() {
//		DeferredUpdates::addUpdate( new HTMLCacheUpdate( $this, 'pagelinks', 'page-touch' ) );
//		if ( $this->mNamespace == NS_CATEGORY ) {
//			DeferredUpdates::addUpdate(
//				new HTMLCacheUpdate( $this, 'categorylinks', 'category-touch' )
//			);
//		}
//	}
//
//	/**
//	 * Get the last touched timestamp
//	 *
//	 * @param IDatabase|null $db
//	 * @return string|false Last-touched timestamp
//	 */
//	public function getTouched( $db = null ) {
//		if ( $db === null ) {
//			$db = wfGetDB( DB_REPLICA );
//		}
//		$touched = $db->selectField( 'page', 'page_touched', $this->pageCond(), __METHOD__ );
//		return $touched;
//	}
//
//	/**
//	 * Get the timestamp when this page was updated since the user last saw it.
//	 *
//	 * @param User|null $user
//	 * @return string|null
//	 */
//	public function getNotificationTimestamp( $user = null ) {
//		global $wgUser;
//
//		// Assume current user if none given
//		if ( !$user ) {
//			$user = $wgUser;
//		}
//		// Check cache first
//		$uid = $user->getId();
//		if ( !$uid ) {
//			return false;
//		}
//		// avoid isset here, as it'll return false for null entries
//		if ( array_key_exists( $uid, $this->mNotificationTimestamp ) ) {
//			return $this->mNotificationTimestamp[$uid];
//		}
//		// Don't cache too much!
//		if ( count( $this->mNotificationTimestamp ) >= self::CACHE_MAX ) {
//			$this->mNotificationTimestamp = [];
//		}
//
//		$store = MediaWikiServices::getInstance()->getWatchedItemStore();
//		$watchedItem = $store->getWatchedItem( $user, $this );
//		if ( $watchedItem ) {
//			$this->mNotificationTimestamp[$uid] = $watchedItem->getNotificationTimestamp();
//		} else {
//			$this->mNotificationTimestamp[$uid] = false;
//		}
//
//		return $this->mNotificationTimestamp[$uid];
//	}
//
//	/**
//	 * Generate strings used for xml 'id' names in monobook tabs
//	 *
//	 * @param string $prepend Defaults to 'nstab-'
//	 * @return string XML 'id' name
//	 */
//	public function getNamespaceKey( $prepend = 'nstab-' ) {
//		// Gets the subject namespace of this title
//		$subjectNS = MWNamespace::getSubject( $this->mNamespace );
//		// Prefer canonical namespace name for HTML IDs
//		$namespaceKey = MWNamespace::getCanonicalName( $subjectNS );
//		if ( $namespaceKey === false ) {
//			// Fallback to localised text
//			$namespaceKey = $this->getSubjectNsText();
//		}
//		// Makes namespace key lowercase
//		$namespaceKey = MediaWikiServices::getInstance()->getContentLanguage()->lc( $namespaceKey );
//		// Uses main
//		if ( $namespaceKey == '' ) {
//			$namespaceKey = 'main';
//		}
//		// Changes file to image for backwards compatibility
//		if ( $namespaceKey == 'file' ) {
//			$namespaceKey = 'image';
//		}
//		return $prepend . $namespaceKey;
//	}
//
//	/**
//	 * Get all extant redirects to this Title
//	 *
//	 * @param int|null $ns Single namespace to consider; null to consider all namespaces
//	 * @return Title[] Array of Title redirects to this title
//	 */
//	public function getRedirectsHere( $ns = null ) {
//		$redirs = [];
//
//		$dbr = wfGetDB( DB_REPLICA );
//		$where = [
//		'rd_namespace' => $this->mNamespace,
//			'rd_title' => $this->mDbkeyform,
//			'rd_from = page_id'
//		];
//		if ( $this->isExternal() ) {
//			$where['rd_interwiki'] = $this->mInterwiki;
//		} else {
//			$where[] = 'rd_interwiki = ' . $dbr->addQuotes( '' ) . ' OR rd_interwiki IS NULL';
//		}
//		if ( !is_null( $ns ) ) {
//			$where['page_namespace'] = $ns;
//		}
//
//		$res = $dbr->select(
//			[ 'redirect', 'page' ],
//			[ 'page_namespace', 'page_title' ],
//		$where,
//			__METHOD__
//		);
//
//		foreach ( $res as $row ) {
//			$redirs[] = self::newFromRow( $row );
//		}
//		return $redirs;
//	}
//
//	/**
//	 * Check if this Title is a valid redirect target
//	 *
//	 * @return bool
//	 */
//	public function isValidRedirectTarget() {
//		global $wgInvalidRedirectTargets;
//
//		if ( $this->isSpecialPage() ) {
//			// invalid redirect targets are stored in a global array, but explicitly disallow Userlogout here
//			if ( $this->isSpecial( 'Userlogout' ) ) {
//				return false;
//			}
//
//			foreach ( $wgInvalidRedirectTargets as $target ) {
//				if ( $this->isSpecial( $target ) ) {
//					return false;
//				}
//			}
//		}
//
//		return true;
//	}
//
//	/**
//	 * Get a backlink cache object
//	 *
//	 * @return BacklinkCache
//	 */
//	public function getBacklinkCache() {
//		return BacklinkCache::get( $this );
//	}
//
//	/**
//	 * Whether the magic words __INDEX__ and __NOINDEX__ function for this page.
//	 *
//	 * @return bool
//	 */
//	public function canUseNoindex() {
//		global $wgExemptFromUserRobotsControl;
//
//		$bannedNamespaces = $wgExemptFromUserRobotsControl ?? MWNamespace::getContentNamespaces();
//
//		return !in_array( $this->mNamespace, $bannedNamespaces );
//	}
//
//	/**
//	 * Returns the raw sort key to be used for categories, with the specified
//	 * prefix.  This will be fed to Collation::getSortKey() to get a
//	 * binary sortkey that can be used for actual sorting.
//	 *
//	 * @param string $prefix The prefix to be used, specified using
//	 *   {{defaultsort:}} or like [[Category:Foo|prefix]].  Empty for no
//	 *   prefix.
//	 * @return string
//	 */
//	public function getCategorySortkey( $prefix = '' ) {
//		$unprefixed = $this->getText();
//
//		// Anything that uses this hook should only depend
//		// on the Title object passed in, and should probably
//		// tell the users to run updateCollations.php --force
//		// in order to re-sort existing category relations.
//		Hooks::run( 'GetDefaultSortkey', [ $this, &$unprefixed ] );
//		if ( $prefix !== '' ) {
//			# Separate with a line feed, so the unprefixed part is only used as
//			# a tiebreaker when two pages have the exact same prefix.
//			# In UCA, tab is the only character that can sort above LF
//			# so we strip both of them from the original prefix.
//			$prefix = strtr( $prefix, "\n\t", '  ' );
//			return "$prefix\n$unprefixed";
//		}
//		return $unprefixed;
//	}
//
//	/**
//	 * Returns the page language code saved in the database, if $wgPageLanguageUseDB is set
//	 * to true in LocalSettings.php, otherwise returns false. If there is no language saved in
//	 * the db, it will return NULL.
//	 *
//	 * @return string|null|bool
//	 */
//	private function getDbPageLanguageCode() {
//		global $wgPageLanguageUseDB;
//
//		// check, if the page language could be saved in the database, and if so and
//		// the value is not requested already, lookup the page language using LinkCache
//		if ( $wgPageLanguageUseDB && $this->mDbPageLanguage === false ) {
//			$linkCache = MediaWikiServices::getInstance()->getLinkCache();
//			$linkCache->addLinkObj( $this );
//			$this->mDbPageLanguage = $linkCache->getGoodLinkFieldObj( $this, 'lang' );
//		}
//
//		return $this->mDbPageLanguage;
//	}
//
//	/**
//	 * Get the language in which the content of this page is written in
//	 * wikitext. Defaults to content language, but in certain cases it can be
//	 * e.g. $wgLang (such as special pages, which are in the user language).
//	 *
//	 * @since 1.18
//	 * @return Language
//	 */
//	public function getPageLanguage() {
//		global $wgLang, $wgLanguageCode;
//		if ( $this->isSpecialPage() ) {
//			// special pages are in the user language
//			return $wgLang;
//		}
//
//		// Checking if DB language is set
//		$dbPageLanguage = $this->getDbPageLanguageCode();
//		if ( $dbPageLanguage ) {
//			return wfGetLangObj( $dbPageLanguage );
//		}
//
//		if ( !$this->mPageLanguage || $this->mPageLanguage[1] !== $wgLanguageCode ) {
//			// Note that this may depend on user settings, so the cache should
//			// be only per-request.
//			// NOTE: ContentHandler::getPageLanguage() may need to load the
//			// content to determine the page language!
//			// Checking $wgLanguageCode hasn't changed for the benefit of unit
//			// tests.
//			$contentHandler = ContentHandler::getForTitle( $this );
//			$langObj = $contentHandler->getPageLanguage( $this );
//			$this->mPageLanguage = [ $langObj->getCode(), $wgLanguageCode ];
//		} else {
//			$langObj = Language::factory( $this->mPageLanguage[0] );
//		}
//
//		return $langObj;
//	}
//
//	/**
//	 * Get the language in which the content of this page is written when
//	 * viewed by user. Defaults to content language, but in certain cases it can be
//	 * e.g. $wgLang (such as special pages, which are in the user language).
//	 *
//	 * @since 1.20
//	 * @return Language
//	 */
//	public function getPageViewLanguage() {
//		global $wgLang;
//
//		if ( $this->isSpecialPage() ) {
//			// If the user chooses a variant, the content is actually
//			// in a language whose code is the variant code.
//			$variant = $wgLang->getPreferredVariant();
//			if ( $wgLang->getCode() !== $variant ) {
//				return Language::factory( $variant );
//			}
//
//			return $wgLang;
//		}
//
//		// Checking if DB language is set
//		$dbPageLanguage = $this->getDbPageLanguageCode();
//		if ( $dbPageLanguage ) {
//			$pageLang = wfGetLangObj( $dbPageLanguage );
//			$variant = $pageLang->getPreferredVariant();
//			if ( $pageLang->getCode() !== $variant ) {
//				$pageLang = Language::factory( $variant );
//			}
//
//			return $pageLang;
//		}
//
//		// @note Can't be cached persistently, depends on user settings.
//		// @note ContentHandler::getPageViewLanguage() may need to load the
//		//   content to determine the page language!
//		$contentHandler = ContentHandler::getForTitle( $this );
//		$pageLang = $contentHandler->getPageViewLanguage( $this );
//		return $pageLang;
//	}
//
//	/**
//	 * Get a list of rendered edit notices for this page.
//	 *
//	 * Array is keyed by the original message key, and values are rendered using parseAsBlock, so
//	 * they will already be wrapped in paragraphs.
//	 *
//	 * @since 1.21
//	 * @param int $oldid Revision ID that's being edited
//	 * @return array
//	 */
//	public function getEditNotices( $oldid = 0 ) {
//		$notices = [];
//
//		// Optional notice for the entire namespace
//		$editnotice_ns = 'editnotice-' . $this->mNamespace;
//		$msg = wfMessage( $editnotice_ns );
//		if ( $msg->exists() ) {
//			$html = $msg->parseAsBlock();
//			// Edit notices may have complex logic, but output nothing (T91715)
//			if ( trim( $html ) !== '' ) {
//				$notices[$editnotice_ns] = Html::rawElement(
//					'div',
//					[ 'class' => [
//				'mw-editnotice',
//					'mw-editnotice-namespace',
//					Sanitizer::escapeClass( "mw-$editnotice_ns" )
//					] ],
//				$html
//				);
//			}
//		}
//
//		if ( MWNamespace::hasSubpages( $this->mNamespace ) ) {
//			// Optional notice for page itself and any parent page
//			$editnotice_base = $editnotice_ns;
//			foreach ( explode( '/', $this->mDbkeyform ) as $part ) {
//				$editnotice_base .= '-' . $part;
//				$msg = wfMessage( $editnotice_base );
//				if ( $msg->exists() ) {
//					$html = $msg->parseAsBlock();
//					if ( trim( $html ) !== '' ) {
//						$notices[$editnotice_base] = Html::rawElement(
//							'div',
//							[ 'class' => [
//						'mw-editnotice',
//							'mw-editnotice-base',
//							Sanitizer::escapeClass( "mw-$editnotice_base" )
//							] ],
//						$html
//						);
//					}
//				}
//			}
//		} else {
//			// Even if there are no subpages in namespace, we still don't want "/" in MediaWiki message keys
//			$editnoticeText = $editnotice_ns . '-' . strtr( $this->mDbkeyform, '/', '-' );
//			$msg = wfMessage( $editnoticeText );
//			if ( $msg->exists() ) {
//				$html = $msg->parseAsBlock();
//				if ( trim( $html ) !== '' ) {
//					$notices[$editnoticeText] = Html::rawElement(
//						'div',
//						[ 'class' => [
//					'mw-editnotice',
//						'mw-editnotice-page',
//						Sanitizer::escapeClass( "mw-$editnoticeText" )
//						] ],
//					$html
//					);
//				}
//			}
//		}
//
//		Hooks::run( 'TitleGetEditNotices', [ $this, $oldid, &$notices ] );
//		return $notices;
//	}
//
//	/**
//	 * @return array
//	 */
//	public function __sleep() {
//		return [
//		'mNamespace',
//			'mDbkeyform',
//			'mFragment',
//			'mInterwiki',
//			'mLocalInterwiki',
//			'mUserCaseDBKey',
//			'mDefaultNamespace',
//		];
//	}
//
//	public function __wakeup() {
//		$this->mArticleID = ( $this->mNamespace >= 0 ) ? -1 : 0;
//		$this->mUrlform = wfUrlencode( $this->mDbkeyform );
//		$this->mTextform = strtr( $this->mDbkeyform, '_', ' ' );
//	}

}