Merge "Surround edit notices with appropriate classes"
[lhc/web/wiklou.git] / includes / Title.php
index b25676c..bb4d04e 100644 (file)
@@ -158,6 +158,9 @@ class Title {
 
        /** @var TitleValue A corresponding TitleValue object */
        private $mTitleValue = null;
+
+       /** @var bool Would deleting this page be a big deletion? */
+       private $mIsBigDeletion = null;
        // @}
 
        /**
@@ -500,7 +503,7 @@ class Title {
                }
 
                $t = new Title();
-               $t->mDbkeyform = Title::makeName( $ns, $title, $fragment, $interwiki );
+               $t->mDbkeyform = Title::makeName( $ns, $title, $fragment, $interwiki, true );
                if ( $t->secureAndSplit() ) {
                        return $t;
                } else {
@@ -611,28 +614,13 @@ class Title {
         * Note that this doesn't pick up many things that could be wrong with titles, but that
         * replacing this regex with something valid will make many titles valid.
         *
-        * @todo move this into MediaWikiTitleCodec
+        * @deprecated since 1.25, use MediaWikiTitleCodec::getTitleInvalidRegex() instead
         *
         * @return string Regex string
         */
        static function getTitleInvalidRegex() {
-               static $rxTc = false;
-               if ( !$rxTc ) {
-                       # Matching titles will be held as illegal.
-                       $rxTc = '/' .
-                               # Any character not allowed is forbidden...
-                               '[^' . self::legalChars() . ']' .
-                               # URL percent encoding sequences interfere with the ability
-                               # to round-trip titles -- you can't link to them consistently.
-                               '|%[0-9A-Fa-f]{2}' .
-                               # XML/HTML character references produce similar issues.
-                               '|&[A-Za-z0-9\x80-\xff]+;' .
-                               '|&#[0-9]+;' .
-                               '|&#x[0-9A-Fa-f]+;' .
-                               '/S';
-               }
-
-               return $rxTc;
+               wfDeprecated( __METHOD__, '1.25' );
+               return MediaWikiTitleCodec::getTitleInvalidRegex();
        }
 
        /**
@@ -744,12 +732,20 @@ class Title {
         * @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 $canoncialNamespace 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 = '' ) {
+       public static function makeName( $ns, $title, $fragment = '', $interwiki = '',
+               $canoncialNamespace = false
+       ) {
                global $wgContLang;
 
-               $namespace = $wgContLang->getNsText( $ns );
+               if ( $canoncialNamespace ) {
+                       $namespace = MWNamespace::getCanonicalName( $ns );
+               } else {
+                       $namespace = $wgContLang->getNsText( $ns );
+               }
                $name = $namespace == '' ? $title : "$namespace:$title";
                if ( strval( $interwiki ) != '' ) {
                        $name = "$interwiki:$name";
@@ -792,7 +788,8 @@ class Title {
 
        /**
         * Determine whether the object refers to a page within
-        * this project.
+        * 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
         */
@@ -941,10 +938,12 @@ class Title {
         * Get the page's content model id, see the CONTENT_MODEL_XXX constants.
         *
         * @throws MWException
+        * @param int $flags A bit field; may be Title::GAID_FOR_UPDATE to select for update
         * @return string Content model id
         */
-       public function getContentModel() {
-               if ( !$this->mContentModel ) {
+       public function getContentModel( $flags = 0 ) {
+               # Calling getArticleID() loads the field from cache as needed
+               if ( !$this->mContentModel && $this->getArticleID( $flags ) ) {
                        $linkCache = LinkCache::singleton();
                        $this->mContentModel = $linkCache->getGoodLinkFieldObj( $this, 'model' );
                }
@@ -1030,7 +1029,6 @@ class Title {
         * Is this in a namespace that allows actual pages?
         *
         * @return bool
-        * @internal note -- uses hardcoded namespace index instead of constants
         */
        public function canExist() {
                return $this->mNamespace >= NS_MAIN;
@@ -1166,7 +1164,7 @@ class Title {
                }
 
                $result = true;
-               wfRunHooks( 'TitleIsMovable', array( $this, &$result ) );
+               Hooks::run( 'TitleIsMovable', array( $this, &$result ) );
                return $result;
        }
 
@@ -1236,9 +1234,9 @@ class Title {
 
                # @note This hook is also called in ContentHandler::getDefaultModel.
                #   It's called here again to make sure hook functions can force this
-               #   method to return true even outside the mediawiki namespace.
+               #   method to return true even outside the MediaWiki namespace.
 
-               wfRunHooks( 'TitleIsCssOrJsPage', array( $this, &$isCssOrJsPage ) );
+               Hooks::run( 'TitleIsCssOrJsPage', array( $this, &$isCssOrJsPage ), '1.25' );
 
                return $isCssOrJsPage;
        }
@@ -1321,6 +1319,25 @@ class Title {
                return Title::makeTitle( $subjectNS, $this->getDBkey() );
        }
 
+       /**
+        * 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
+        * @return Title
+        */
+       public function getOtherPage() {
+               if ( $this->isSpecialPage() ) {
+                       throw new MWException( 'Special pages cannot have other pages' );
+               }
+               if ( $this->isTalkPage() ) {
+                       return $this->getSubjectPage();
+               } else {
+                       return $this->getTalkPage();
+               }
+       }
+
        /**
         * Get the default namespace index, for when there is no namespace
         *
@@ -1645,7 +1662,7 @@ class Title {
                # Finally, add the fragment.
                $url .= $this->getFragmentForURL();
 
-               wfRunHooks( 'GetFullURL', array( &$this, &$url, $query ) );
+               Hooks::run( 'GetFullURL', array( &$this, &$url, $query ) );
                return $url;
        }
 
@@ -1691,7 +1708,7 @@ class Title {
                        $dbkey = wfUrlencode( $this->getPrefixedDBkey() );
                        if ( $query == '' ) {
                                $url = str_replace( '$1', $dbkey, $wgArticlePath );
-                               wfRunHooks( 'GetLocalURL::Article', array( &$this, &$url ) );
+                               Hooks::run( 'GetLocalURL::Article', array( &$this, &$url ) );
                        } else {
                                global $wgVariantArticlePath, $wgActionPaths, $wgContLang;
                                $url = false;
@@ -1736,7 +1753,7 @@ class Title {
                                }
                        }
 
-                       wfRunHooks( 'GetLocalURL::Internal', array( &$this, &$url, $query ) );
+                       Hooks::run( 'GetLocalURL::Internal', array( &$this, &$url, $query ) );
 
                        // @todo FIXME: This causes breakage in various places when we
                        // actually expected a local URL and end up with dupe prefixes.
@@ -1744,7 +1761,7 @@ class Title {
                                $url = $wgServer . $url;
                        }
                }
-               wfRunHooks( 'GetLocalURL', array( &$this, &$url, $query ) );
+               Hooks::run( 'GetLocalURL', array( &$this, &$url, $query ) );
                return $url;
        }
 
@@ -1765,7 +1782,6 @@ class Title {
         * @return string The URL
         */
        public function getLinkURL( $query = '', $query2 = false, $proto = PROTO_RELATIVE ) {
-               wfProfileIn( __METHOD__ );
                if ( $this->isExternal() || $proto !== PROTO_RELATIVE ) {
                        $ret = $this->getFullURL( $query, $query2, $proto );
                } elseif ( $this->getPrefixedText() === '' && $this->hasFragment() ) {
@@ -1773,7 +1789,6 @@ class Title {
                } else {
                        $ret = $this->getLocalURL( $query, $query2 ) . $this->getFragmentForURL();
                }
-               wfProfileOut( __METHOD__ );
                return $ret;
        }
 
@@ -1794,7 +1809,7 @@ class Title {
                $query = self::fixUrlQueryArgs( $query, $query2 );
                $server = $wgInternalServer !== false ? $wgInternalServer : $wgServer;
                $url = wfExpandUrl( $server . $this->getLocalURL( $query ), PROTO_HTTP );
-               wfRunHooks( 'GetInternalURL', array( &$this, &$url, $query ) );
+               Hooks::run( 'GetInternalURL', array( &$this, &$url, $query ) );
                return $url;
        }
 
@@ -1812,7 +1827,7 @@ class Title {
        public function getCanonicalURL( $query = '', $query2 = false ) {
                $query = self::fixUrlQueryArgs( $query, $query2 );
                $url = wfExpandUrl( $this->getLocalURL( $query ) . $this->getFragmentForURL(), PROTO_CANONICAL );
-               wfRunHooks( 'GetCanonicalURL', array( &$this, &$url, $query ) );
+               Hooks::run( 'GetCanonicalURL', array( &$this, &$url, $query ) );
                return $url;
        }
 
@@ -1931,7 +1946,7 @@ class Title {
        private function checkQuickPermissions( $action, $user, $errors,
                $doExpensiveQueries, $short
        ) {
-               if ( !wfRunHooks( 'TitleQuickPermissions',
+               if ( !Hooks::run( 'TitleQuickPermissions',
                        array( $this, $user, $action, &$errors, $doExpensiveQueries, $short ) )
                ) {
                        return $errors;
@@ -2031,18 +2046,18 @@ class Title {
        private function checkPermissionHooks( $action, $user, $errors, $doExpensiveQueries, $short ) {
                // Use getUserPermissionsErrors instead
                $result = '';
-               if ( !wfRunHooks( 'userCan', array( &$this, &$user, $action, &$result ) ) ) {
+               if ( !Hooks::run( 'userCan', array( &$this, &$user, $action, &$result ) ) ) {
                        return $result ? array() : array( array( 'badaccess-group0' ) );
                }
                // Check getUserPermissionsErrors hook
-               if ( !wfRunHooks( 'getUserPermissionsErrors', array( &$this, &$user, $action, &$result ) ) ) {
+               if ( !Hooks::run( 'getUserPermissionsErrors', array( &$this, &$user, $action, &$result ) ) ) {
                        $errors = $this->resultToError( $errors, $result );
                }
                // Check getUserPermissionsErrorsExpensive hook
                if (
                        $doExpensiveQueries
                        && !( $short && count( $errors ) > 0 )
-                       && !wfRunHooks( 'getUserPermissionsErrorsExpensive', array( &$this, &$user, $action, &$result ) )
+                       && !Hooks::run( 'getUserPermissionsErrorsExpensive', array( &$this, &$user, $action, &$result ) )
                ) {
                        $errors = $this->resultToError( $errors, $result );
                }
@@ -2075,7 +2090,7 @@ class Title {
                        $ns = $this->mNamespace == NS_MAIN ?
                                wfMessage( 'nstab-main' )->text() : $this->getNsText();
                        $errors[] = $this->mNamespace == NS_MEDIAWIKI ?
-                               array( 'protectedinterface' ) : array( 'namespaceprotected', $ns );
+                               array( 'protectedinterface', $action ) : array( 'namespaceprotected', $ns, $action );
                }
 
                return $errors;
@@ -2099,15 +2114,15 @@ class Title {
                if ( $action != 'patrol' && !$user->isAllowed( 'editusercssjs' ) ) {
                        if ( preg_match( '/^' . preg_quote( $user->getName(), '/' ) . '\//', $this->mTextform ) ) {
                                if ( $this->isCssSubpage() && !$user->isAllowedAny( 'editmyusercss', 'editusercss' ) ) {
-                                       $errors[] = array( 'mycustomcssprotected' );
+                                       $errors[] = array( 'mycustomcssprotected', $action );
                                } elseif ( $this->isJsSubpage() && !$user->isAllowedAny( 'editmyuserjs', 'edituserjs' ) ) {
-                                       $errors[] = array( 'mycustomjsprotected' );
+                                       $errors[] = array( 'mycustomjsprotected', $action );
                                }
                        } else {
                                if ( $this->isCssSubpage() && !$user->isAllowed( 'editusercss' ) ) {
-                                       $errors[] = array( 'customcssprotected' );
+                                       $errors[] = array( 'customcssprotected', $action );
                                } elseif ( $this->isJsSubpage() && !$user->isAllowed( 'edituserjs' ) ) {
-                                       $errors[] = array( 'customjsprotected' );
+                                       $errors[] = array( 'customjsprotected', $action );
                                }
                        }
                }
@@ -2142,9 +2157,9 @@ class Title {
                                continue;
                        }
                        if ( !$user->isAllowed( $right ) ) {
-                               $errors[] = array( 'protectedpagetext', $right );
+                               $errors[] = array( 'protectedpagetext', $right, $action );
                        } elseif ( $this->mCascadeRestriction && !$user->isAllowed( 'protect' ) ) {
-                               $errors[] = array( 'protectedpagetext', 'protect' );
+                               $errors[] = array( 'protectedpagetext', 'protect', $action );
                        }
                }
 
@@ -2191,7 +2206,7 @@ class Title {
                                                foreach ( $cascadingSources as $page ) {
                                                        $pages .= '* [[:' . $page->getPrefixedText() . "]]\n";
                                                }
-                                               $errors[] = array( 'cascadeprotected', count( $cascadingSources ), $pages );
+                                               $errors[] = array( 'cascadeprotected', count( $cascadingSources ), $pages, $action );
                                        }
                                }
                        }
@@ -2226,19 +2241,13 @@ class Title {
                } elseif ( $action == 'create' ) {
                        $title_protection = $this->getTitleProtection();
                        if ( $title_protection ) {
-                               if ( $title_protection['pt_create_perm'] == 'sysop' ) {
-                                       $title_protection['pt_create_perm'] = 'editprotected'; // B/C
-                               }
-                               if ( $title_protection['pt_create_perm'] == 'autoconfirmed' ) {
-                                       $title_protection['pt_create_perm'] = 'editsemiprotected'; // B/C
-                               }
-                               if ( $title_protection['pt_create_perm'] == ''
-                                       || !$user->isAllowed( $title_protection['pt_create_perm'] )
+                               if ( $title_protection['permission'] == ''
+                                       || !$user->isAllowed( $title_protection['permission'] )
                                ) {
                                        $errors[] = array(
                                                'titleprotected',
-                                               User::whoIs( $title_protection['pt_user'] ),
-                                               $title_protection['pt_reason']
+                                               User::whoIs( $title_protection['user'] ),
+                                               $title_protection['reason']
                                        );
                                }
                        }
@@ -2258,11 +2267,15 @@ class Title {
                                $errors[] = array( 'immobile-target-page' );
                        }
                } elseif ( $action == 'delete' ) {
-                       if ( count( $this->getUserPermissionsErrorsInternal( 'edit',
-                               $user, $doExpensiveQueries, true ) )
-                       ) {
-                               // If they can't edit, they shouldn't delete.
-                               $errors[] = array( 'delete-cantedit' );
+                       $tempErrors = $this->checkPageRestrictions( 'edit',
+                               $user, array(), $doExpensiveQueries, true );
+                       if ( !$tempErrors ) {
+                               $tempErrors = $this->checkCascadingSourcesRestrictions( 'edit',
+                                       $user, $tempErrors, $doExpensiveQueries, true );
+                       }
+                       if ( $tempErrors ) {
+                               // If protection keeps them from editing, they shouldn't be able to delete.
+                               $errors[] = array( 'deleteprotected' );
                        }
                        if ( $doExpensiveQueries && $wgDeleteRevisionsLimit
                                && !$this->userCan( 'bigdelete', $user ) && $this->isBigDeletion()
@@ -2377,7 +2390,7 @@ class Title {
 
                if ( !$whitelisted ) {
                        # If the title is not whitelisted, give extensions a chance to do so...
-                       wfRunHooks( 'TitleReadWhitelist', array( $this, $user, &$whitelisted ) );
+                       Hooks::run( 'TitleReadWhitelist', array( $this, $user, &$whitelisted ) );
                        if ( !$whitelisted ) {
                                $errors[] = $this->missingPermissionError( $action, $short );
                        }
@@ -2429,7 +2442,6 @@ class Title {
        protected function getUserPermissionsErrorsInternal( $action, $user,
                $doExpensiveQueries = true, $short = false
        ) {
-               wfProfileIn( __METHOD__ );
 
                # Read has special handling
                if ( $action == 'read' ) {
@@ -2437,6 +2449,19 @@ class Title {
                                'checkPermissionHooks',
                                'checkReadPermissions',
                        );
+               # Don't call checkSpecialsAndNSPermissions or checkCSSandJSPermissions
+               # here as it will lead to duplicate error messages. This is okay to do
+               # since anywhere that checks for create will also check for edit, and
+               # those checks are called for edit.
+               } elseif ( $action == 'create' ) {
+                       $checks = array(
+                               'checkQuickPermissions',
+                               'checkPermissionHooks',
+                               'checkPageRestrictions',
+                               'checkCascadingSourcesRestrictions',
+                               'checkActionPermissions',
+                               'checkUserBlock'
+                       );
                } else {
                        $checks = array(
                                'checkQuickPermissions',
@@ -2457,7 +2482,6 @@ class Title {
                        $errors = $this->$method( $action, $user, $errors, $doExpensiveQueries, $short );
                }
 
-               wfProfileOut( __METHOD__ );
                return $errors;
        }
 
@@ -2498,7 +2522,7 @@ class Title {
                        $types = array_diff( $types, array( 'upload' ) );
                }
 
-               wfRunHooks( 'TitleGetRestrictionTypes', array( $this, &$types ) );
+               Hooks::run( 'TitleGetRestrictionTypes', array( $this, &$types ) );
 
                wfDebug( __METHOD__ . ': applicable restrictions to [[' .
                        $this->getPrefixedText() . ']] are {' . implode( ',', $types ) . "}\n" );
@@ -2513,7 +2537,7 @@ class Title {
         * @return array|bool An associative array representing any existent title
         *   protection, or false if there's none.
         */
-       private function getTitleProtection() {
+       public function getTitleProtection() {
                // Can't protect pages in special namespaces
                if ( $this->getNamespace() < 0 ) {
                        return false;
@@ -2528,13 +2552,27 @@ class Title {
                        $dbr = wfGetDB( DB_SLAVE );
                        $res = $dbr->select(
                                'protected_titles',
-                               array( 'pt_user', 'pt_reason', 'pt_expiry', 'pt_create_perm' ),
+                               array(
+                                       'user' => 'pt_user',
+                                       'reason' => 'pt_reason',
+                                       'expiry' => 'pt_expiry',
+                                       'permission' => 'pt_create_perm'
+                               ),
                                array( 'pt_namespace' => $this->getNamespace(), 'pt_title' => $this->getDBkey() ),
                                __METHOD__
                        );
 
                        // fetchRow returns false if there are no rows.
-                       $this->mTitleProtection = $dbr->fetchRow( $res );
+                       $row = $dbr->fetchRow( $res );
+                       if ( $row ) {
+                               if ( $row['permission'] == 'sysop' ) {
+                                       $row['permission'] = 'editprotected'; // B/C
+                               }
+                               if ( $row['permission'] == 'autoconfirmed' ) {
+                                       $row['permission'] = 'editsemiprotected'; // B/C
+                               }
+                       }
+                       $this->mTitleProtection = $row;
                }
                return $this->mTitleProtection;
        }
@@ -2679,8 +2717,6 @@ class Title {
                        return array( $this->mHasCascadingRestrictions, $pagerestrictions );
                }
 
-               wfProfileIn( __METHOD__ );
-
                $dbr = wfGetDB( DB_SLAVE );
 
                if ( $this->getNamespace() == NS_FILE ) {
@@ -2755,7 +2791,6 @@ class Title {
                        $this->mHasCascadingRestrictions = $sources;
                }
 
-               wfProfileOut( __METHOD__ );
                return array( $sources, $pagerestrictions );
        }
 
@@ -2774,8 +2809,10 @@ class Title {
         * 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.
+        * @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 ) {
@@ -2955,12 +2992,12 @@ class Title {
 
                                if ( $title_protection ) {
                                        $now = wfTimestampNow();
-                                       $expiry = $wgContLang->formatExpiry( $title_protection['pt_expiry'], TS_MW );
+                                       $expiry = $wgContLang->formatExpiry( $title_protection['expiry'], TS_MW );
 
                                        if ( !$expiry || $expiry > $now ) {
                                                // Apply the restrictions
                                                $this->mRestrictionsExpiry['create'] = $expiry;
-                                               $this->mRestrictions['create'] = explode( ',', trim( $title_protection['pt_create_perm'] ) );
+                                               $this->mRestrictions['create'] = explode( ',', trim( $title_protection['permission'] ) );
                                        } else { // Get rid of the old restrictions
                                                Title::purgeExpiredRestrictions();
                                                $this->mTitleProtection = false;
@@ -3258,6 +3295,7 @@ class Title {
                $this->mEstimateRevisions = null;
                $this->mPageLanguage = false;
                $this->mDbPageLanguage = null;
+               $this->mIsBigDeletion = null;
        }
 
        /**
@@ -3300,8 +3338,8 @@ class Title {
                        // @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.
-                       $parser = self::getTitleParser();
-                       $parts = $parser->splitTitleString( $dbkey, $this->getDefaultNamespace() );
+                       $titleParser = self::getTitleParser();
+                       $parts = $titleParser->splitTitleString( $dbkey, $this->getDefaultNamespace() );
                } catch ( MalformedTitleException $ex ) {
                        return false;
                }
@@ -3536,7 +3574,7 @@ class Title {
                        $urls[] = $this->getInternalUrl( 'action=raw&ctype=text/css' );
                }
 
-               wfRunHooks( 'TitleSquidURLs', array( $this, &$urls ) );
+               Hooks::run( 'TitleSquidURLs', array( $this, &$urls ) );
                return $urls;
        }
 
@@ -3555,10 +3593,12 @@ class Title {
        /**
         * Move this page without authentication
         *
+        * @deprecated since 1.25 use MovePage class instead
         * @param Title $nt The new page Title
         * @return array|bool True on success, getUserPermissionsErrors()-like array on failure
         */
        public function moveNoAuth( &$nt ) {
+               wfDeprecated( __METHOD__, '1.25' );
                return $this->moveTo( $nt, false );
        }
 
@@ -3566,116 +3606,33 @@ class Title {
         * 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 Indicates whether $wgUser's permissions
-        *  should be checked
+        * @param bool $auth Ignored
         * @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, $wgContentHandlerUseDB;
+               global $wgUser;
 
-               $errors = array();
-               if ( !$nt ) {
+               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 array( array( 'badtitletext' ) );
                }
-               if ( $this->equals( $nt ) ) {
-                       $errors[] = array( 'selfmove' );
-               }
-               if ( !$this->isMovable() ) {
-                       $errors[] = array( 'immobile-source-namespace', $this->getNsText() );
-               }
-               if ( $nt->isExternal() ) {
-                       $errors[] = array( 'immobile-target-namespace-iw' );
-               }
-               if ( !$nt->isMovable() ) {
-                       $errors[] = array( 'immobile-target-namespace', $nt->getNsText() );
-               }
-
-               $oldid = $this->getArticleID();
-               $newid = $nt->getArticleID();
-
-               if ( strlen( $nt->getDBkey() ) < 1 ) {
-                       $errors[] = array( 'articleexists' );
-               }
-               if (
-                       ( $this->getDBkey() == '' ) ||
-                       ( !$oldid ) ||
-                       ( $nt->getDBkey() == '' )
-               ) {
-                       $errors[] = array( 'badarticleerror' );
-               }
-
-               // Content model checks
-               if ( !$wgContentHandlerUseDB &&
-                               $this->getContentModel() !== $nt->getContentModel() ) {
-                       // can't move a page if that would change the page's content model
-                       $errors[] = array(
-                               'bad-target-model',
-                               ContentHandler::getLocalizedName( $this->getContentModel() ),
-                               ContentHandler::getLocalizedName( $nt->getContentModel() )
-                       );
-               }
-
-               // Image-specific checks
-               if ( $this->getNamespace() == NS_FILE ) {
-                       $errors = array_merge( $errors, $this->validateFileMoveOperation( $nt ) );
-               }
-
-               if ( $nt->getNamespace() == NS_FILE && $this->getNamespace() != NS_FILE ) {
-                       $errors[] = array( 'nonfile-cannot-move-to-file' );
-               }
-
-               if ( $auth ) {
-                       $errors = wfMergeErrorArrays( $errors,
-                               $this->getUserPermissionsErrors( 'move', $wgUser ),
-                               $this->getUserPermissionsErrors( 'edit', $wgUser ),
-                               $nt->getUserPermissionsErrors( 'move-target', $wgUser ),
-                               $nt->getUserPermissionsErrors( 'edit', $wgUser ) );
-               }
 
-               $match = EditPage::matchSummarySpamRegex( $reason );
-               if ( $match !== false ) {
-                       // This is kind of lame, won't display nice
-                       $errors[] = array( 'spamprotectiontext' );
-               }
-
-               $err = null;
-               if ( !wfRunHooks( 'AbortMove', array( $this, $nt, $wgUser, &$err, $reason ) ) ) {
-                       $errors[] = array( 'hookaborted', $err );
-               }
-
-               # The move is allowed only if (1) the target doesn't exist, or
-               # (2) the target is a redirect to the source, and has no history
-               # (so we can undo bad moves right after they're done).
+               $mp = new MovePage( $this, $nt );
+               $errors = wfMergeErrorArrays(
+                       $mp->isValidMove()->getErrorsArray(),
+                       $mp->checkPermissions( $wgUser, $reason )->getErrorsArray()
+               );
 
-               if ( 0 != $newid ) { # Target exists; check for validity
-                       if ( !$this->isValidMoveTarget( $nt ) ) {
-                               $errors[] = array( 'articleexists' );
-                       }
-               } else {
-                       $tp = $nt->getTitleProtection();
-                       $right = $tp['pt_create_perm'];
-                       if ( $right == 'sysop' ) {
-                               $right = 'editprotected'; // B/C
-                       }
-                       if ( $right == 'autoconfirmed' ) {
-                               $right = 'editsemiprotected'; // B/C
-                       }
-                       if ( $tp and !$wgUser->isAllowed( $right ) ) {
-                               $errors[] = array( 'cantmove-titleprotected' );
-                       }
-               }
-               if ( empty( $errors ) ) {
-                       return true;
-               }
-               return $errors;
+               return $errors ? : true;
        }
 
        /**
         * Check if the requested move target is a valid file move target
+        * @todo move this to MovePage
         * @param Title $nt Target title
         * @return array List of errors
         */
@@ -3684,27 +3641,6 @@ class Title {
 
                $errors = array();
 
-               // wfFindFile( $nt ) / wfLocalFile( $nt ) is not allowed until below
-
-               $file = wfLocalFile( $this );
-               if ( $file->exists() ) {
-                       if ( $nt->getText() != wfStripIllegalFilenameChars( $nt->getText() ) ) {
-                               $errors[] = array( 'imageinvalidfilename' );
-                       }
-                       if ( !File::checkExtensionCompatibility( $file, $nt->getDBkey() ) ) {
-                               $errors[] = array( 'imagetypemismatch' );
-                       }
-               }
-
-               if ( $nt->getNamespace() != NS_FILE ) {
-                       $errors[] = array( 'imagenocrossnamespace' );
-                       // From here we want to do checks on a file object, so if we can't
-                       // create one, we must return.
-                       return $errors;
-               }
-
-               // wfFindFile( $nt ) / wfLocalFile( $nt ) is allowed below here
-
                $destFile = wfLocalFile( $nt );
                if ( !$wgUser->isAllowed( 'reupload-shared' ) && !$destFile->exists() && wfFindFile( $nt ) ) {
                        $errors[] = array( 'file-exists-sharedrepo' );
@@ -3716,6 +3652,7 @@ class Title {
        /**
         * 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
@@ -3737,279 +3674,13 @@ class Title {
                        $createRedirect = true;
                }
 
-               wfRunHooks( 'TitleMove', array( $this, $nt, $wgUser ) );
-
-               // If it is a file, move it first.
-               // It is done before all other moving stuff is done because it's hard to revert.
-               $dbw = wfGetDB( DB_MASTER );
-               if ( $this->getNamespace() == NS_FILE ) {
-                       $file = wfLocalFile( $this );
-                       if ( $file->exists() ) {
-                               $status = $file->move( $nt );
-                               if ( !$status->isOk() ) {
-                                       return $status->getErrorsArray();
-                               }
-                       }
-                       // Clear RepoGroup process cache
-                       RepoGroup::singleton()->clearCache( $this );
-                       RepoGroup::singleton()->clearCache( $nt ); # clear false negative cache
-               }
-
-               $dbw->begin( __METHOD__ ); # If $file was a LocalFile, its transaction would have closed our own.
-               $pageid = $this->getArticleID( self::GAID_FOR_UPDATE );
-               $protected = $this->isProtected();
-
-               // Do the actual move
-               $this->moveToInternal( $nt, $reason, $createRedirect );
-
-               // Refresh the sortkey for this row.  Be careful to avoid resetting
-               // cl_timestamp, which may disturb time-based lists on some sites.
-               $prefixes = $dbw->select(
-                       'categorylinks',
-                       array( 'cl_sortkey_prefix', 'cl_to' ),
-                       array( 'cl_from' => $pageid ),
-                       __METHOD__
-               );
-               foreach ( $prefixes as $prefixRow ) {
-                       $prefix = $prefixRow->cl_sortkey_prefix;
-                       $catTo = $prefixRow->cl_to;
-                       $dbw->update( 'categorylinks',
-                               array(
-                                       'cl_sortkey' => Collation::singleton()->getSortKey(
-                                               $nt->getCategorySortkey( $prefix ) ),
-                                       'cl_timestamp=cl_timestamp' ),
-                               array(
-                                       'cl_from' => $pageid,
-                                       'cl_to' => $catTo ),
-                               __METHOD__
-                       );
-               }
-
-               $redirid = $this->getArticleID();
-
-               if ( $protected ) {
-                       # Protect the redirect title as the title used to be...
-                       $dbw->insertSelect( 'page_restrictions', 'page_restrictions',
-                               array(
-                                       'pr_page' => $redirid,
-                                       'pr_type' => 'pr_type',
-                                       'pr_level' => 'pr_level',
-                                       'pr_cascade' => 'pr_cascade',
-                                       'pr_user' => 'pr_user',
-                                       'pr_expiry' => 'pr_expiry'
-                               ),
-                               array( 'pr_page' => $pageid ),
-                               __METHOD__,
-                               array( 'IGNORE' )
-                       );
-                       # Update the protection log
-                       $log = new LogPage( 'protect' );
-                       $comment = wfMessage(
-                               'prot_1movedto2',
-                               $this->getPrefixedText(),
-                               $nt->getPrefixedText()
-                       )->inContentLanguage()->text();
-                       if ( $reason ) {
-                               $comment .= wfMessage( 'colon-separator' )->inContentLanguage()->text() . $reason;
-                       }
-                       // @todo FIXME: $params?
-                       $logId = $log->addEntry(
-                               'move_prot',
-                               $nt,
-                               $comment,
-                               array( $this->getPrefixedText() ),
-                               $wgUser
-                       );
-
-                       // reread inserted pr_ids for log relation
-                       $insertedPrIds = $dbw->select(
-                               'page_restrictions',
-                               'pr_id',
-                               array( 'pr_page' => $redirid ),
-                               __METHOD__
-                       );
-                       $logRelationsValues = array();
-                       foreach ( $insertedPrIds as $prid ) {
-                               $logRelationsValues[] = $prid->pr_id;
-                       }
-                       $log->addRelations( 'pr_id', $logRelationsValues, $logId );
-               }
-
-               // Update *_from_namespace fields as needed
-               if ( $this->getNamespace() != $nt->getNamespace() ) {
-                       $dbw->update( 'pagelinks',
-                               array( 'pl_from_namespace' => $nt->getNamespace() ),
-                               array( 'pl_from' => $pageid ),
-                               __METHOD__
-                       );
-                       $dbw->update( 'templatelinks',
-                               array( 'tl_from_namespace' => $nt->getNamespace() ),
-                               array( 'tl_from' => $pageid ),
-                               __METHOD__
-                       );
-                       $dbw->update( 'imagelinks',
-                               array( 'il_from_namespace' => $nt->getNamespace() ),
-                               array( 'il_from' => $pageid ),
-                               __METHOD__
-                       );
-               }
-
-               # Update watchlists
-               $oldtitle = $this->getDBkey();
-               $newtitle = $nt->getDBkey();
-               $oldsnamespace = MWNamespace::getSubject( $this->getNamespace() );
-               $newsnamespace = MWNamespace::getSubject( $nt->getNamespace() );
-               if ( $oldsnamespace != $newsnamespace || $oldtitle != $newtitle ) {
-                       WatchedItem::duplicateEntries( $this, $nt );
-               }
-
-               $dbw->commit( __METHOD__ );
-
-               wfRunHooks( 'TitleMoveComplete', array( &$this, &$nt, &$wgUser, $pageid, $redirid, $reason ) );
-               return true;
-       }
-
-       /**
-        * Move page to a title which is either a redirect to the
-        * source page or nonexistent
-        *
-        * @param Title $nt The page to move to, which should be a redirect or nonexistent
-        * @param string $reason The reason for the move
-        * @param bool $createRedirect Whether to leave a redirect at the old title. Does not check
-        *   if the user has the suppressredirect right
-        * @throws MWException
-        */
-       private function moveToInternal( &$nt, $reason = '', $createRedirect = true ) {
-               global $wgUser, $wgContLang;
-
-               if ( $nt->exists() ) {
-                       $moveOverRedirect = true;
-                       $logType = 'move_redir';
-               } else {
-                       $moveOverRedirect = false;
-                       $logType = 'move';
-               }
-
-               if ( $createRedirect ) {
-                       if ( $this->getNamespace() == NS_CATEGORY
-                               && !wfMessage( 'category-move-redirect-override' )->inContentLanguage()->isDisabled()
-                       ) {
-                               $redirectContent = new WikitextContent(
-                                       wfMessage( 'category-move-redirect-override' )
-                                               ->params( $nt->getPrefixedText() )->inContentLanguage()->plain() );
-                       } else {
-                               $contentHandler = ContentHandler::getForTitle( $this );
-                               $redirectContent = $contentHandler->makeRedirectContent( $nt,
-                                       wfMessage( 'move-redirect-text' )->inContentLanguage()->plain() );
-                       }
-
-                       // NOTE: If this page's content model does not support redirects, $redirectContent will be null.
+               $mp = new MovePage( $this, $nt );
+               $status = $mp->move( $wgUser, $reason, $createRedirect );
+               if ( $status->isOK() ) {
+                       return true;
                } else {
-                       $redirectContent = null;
-               }
-
-               $logEntry = new ManualLogEntry( 'move', $logType );
-               $logEntry->setPerformer( $wgUser );
-               $logEntry->setTarget( $this );
-               $logEntry->setComment( $reason );
-               $logEntry->setParameters( array(
-                       '4::target' => $nt->getPrefixedText(),
-                       '5::noredir' => $redirectContent ? '0': '1',
-               ) );
-
-               $formatter = LogFormatter::newFromEntry( $logEntry );
-               $formatter->setContext( RequestContext::newExtraneousContext( $this ) );
-               $comment = $formatter->getPlainActionText();
-               if ( $reason ) {
-                       $comment .= wfMessage( 'colon-separator' )->inContentLanguage()->text() . $reason;
-               }
-               # Truncate for whole multibyte characters.
-               $comment = $wgContLang->truncate( $comment, 255 );
-
-               $oldid = $this->getArticleID();
-
-               $dbw = wfGetDB( DB_MASTER );
-
-               $newpage = WikiPage::factory( $nt );
-
-               if ( $moveOverRedirect ) {
-                       $newid = $nt->getArticleID();
-                       $newcontent = $newpage->getContent();
-
-                       # Delete the old redirect. We don't save it to history since
-                       # by definition if we've got here it's rather uninteresting.
-                       # We have to remove it so that the next step doesn't trigger
-                       # a conflict on the unique namespace+title index...
-                       $dbw->delete( 'page', array( 'page_id' => $newid ), __METHOD__ );
-
-                       $newpage->doDeleteUpdates( $newid, $newcontent );
-               }
-
-               # Save a null revision in the page's history notifying of the move
-               $nullRevision = Revision::newNullRevision( $dbw, $oldid, $comment, true, $wgUser );
-               if ( !is_object( $nullRevision ) ) {
-                       throw new MWException( 'No valid null revision produced in ' . __METHOD__ );
+                       return $status->getErrorsArray();
                }
-
-               $nullRevision->insertOn( $dbw );
-
-               # Change the name of the target page:
-               $dbw->update( 'page',
-                       /* SET */ array(
-                               'page_namespace' => $nt->getNamespace(),
-                               'page_title' => $nt->getDBkey(),
-                       ),
-                       /* WHERE */ array( 'page_id' => $oldid ),
-                       __METHOD__
-               );
-
-               // clean up the old title before reset article id - bug 45348
-               if ( !$redirectContent ) {
-                       WikiPage::onArticleDelete( $this );
-               }
-
-               $this->resetArticleID( 0 ); // 0 == non existing
-               $nt->resetArticleID( $oldid );
-               $newpage->loadPageData( WikiPage::READ_LOCKING ); // bug 46397
-
-               $newpage->updateRevisionOn( $dbw, $nullRevision );
-
-               wfRunHooks( 'NewRevisionFromEditComplete',
-                       array( $newpage, $nullRevision, $nullRevision->getParentId(), $wgUser ) );
-
-               $newpage->doEditUpdates( $nullRevision, $wgUser, array( 'changed' => false ) );
-
-               if ( !$moveOverRedirect ) {
-                       WikiPage::onArticleCreate( $nt );
-               }
-
-               # Recreate the redirect, this time in the other direction.
-               if ( $redirectContent ) {
-                       $redirectArticle = WikiPage::factory( $this );
-                       $redirectArticle->loadFromRow( false, WikiPage::READ_LOCKING ); // bug 46397
-                       $newid = $redirectArticle->insertOn( $dbw );
-                       if ( $newid ) { // sanity
-                               $this->resetArticleID( $newid );
-                               $redirectRevision = new Revision( array(
-                                       'title' => $this, // for determining the default content model
-                                       'page' => $newid,
-                                       'user_text' => $wgUser->getName(),
-                                       'user' => $wgUser->getId(),
-                                       'comment' => $comment,
-                                       'content' => $redirectContent ) );
-                               $redirectRevision->insertOn( $dbw );
-                               $redirectArticle->updateRevisionOn( $dbw, $redirectRevision, 0 );
-
-                               wfRunHooks( 'NewRevisionFromEditComplete',
-                                       array( $redirectArticle, $redirectRevision, false, $wgUser ) );
-
-                               $redirectArticle->doEditUpdates( $redirectRevision, $wgUser, array( 'created' => true ) );
-                       }
-               }
-
-               # Log the move
-               $logid = $logEntry->insert();
-               $logEntry->publish( $logid );
        }
 
        /**
@@ -4138,6 +3809,7 @@ class Title {
         * 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
         */
@@ -4364,12 +4036,25 @@ class Title {
                        return false;
                }
 
-               $revCount = $this->estimateRevisionCount();
-               return $revCount > $wgDeleteRevisionsLimit;
+               if ( $this->mIsBigDeletion === null ) {
+                       $dbr = wfGetDB( DB_SLAVE );
+
+                       $revCount = $dbr->selectRowCount(
+                               'revision',
+                               '1',
+                               array( 'rev_page' => $this->getArticleID() ),
+                               __METHOD__,
+                               array( 'LIMIT' => $wgDeleteRevisionsLimit + 1 )
+                       );
+
+                       $this->mIsBigDeletion = $revCount > $wgDeleteRevisionsLimit;
+               }
+
+               return $this->mIsBigDeletion;
        }
 
        /**
-        * Get the  approximate revision count of this page.
+        * Get the approximate revision count of this page.
         *
         * @return int
         */
@@ -4552,7 +4237,9 @@ class Title {
         * @return bool
         */
        public function exists() {
-               return $this->getArticleID() != 0;
+               $exists = $this->getArticleID() != 0;
+               Hooks::run( 'TitleExists', array( $this, &$exists ) );
+               return $exists;
        }
 
        /**
@@ -4584,7 +4271,7 @@ class Title {
                 * @param Title $title
                 * @param bool|null $isKnown
                 */
-               wfRunHooks( 'TitleIsAlwaysKnown', array( $this, &$isKnown ) );
+               Hooks::run( 'TitleIsAlwaysKnown', array( $this, &$isKnown ) );
 
                if ( !is_null( $isKnown ) ) {
                        return $isKnown;
@@ -4907,7 +4594,7 @@ class Title {
                // 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.
-               wfRunHooks( 'GetDefaultSortkey', array( $this, &$unprefixed ) );
+               Hooks::run( 'GetDefaultSortkey', array( $this, &$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.
@@ -4929,16 +4616,13 @@ class Title {
         */
        public function getPageLanguage() {
                global $wgLang, $wgLanguageCode;
-               wfProfileIn( __METHOD__ );
                if ( $this->isSpecialPage() ) {
                        // special pages are in the user language
-                       wfProfileOut( __METHOD__ );
                        return $wgLang;
                }
 
                // Checking if DB language is set
                if ( $this->mDbPageLanguage ) {
-                       wfProfileOut( __METHOD__ );
                        return wfGetLangObj( $this->mDbPageLanguage );
                }
 
@@ -4956,7 +4640,6 @@ class Title {
                        $langObj = wfGetLangObj( $this->mPageLanguage[0] );
                }
 
-               wfProfileOut( __METHOD__ );
                return $langObj;
        }
 
@@ -5034,7 +4717,7 @@ class Title {
                        }
                }
 
-               wfRunHooks( 'TitleGetEditNotices', array( $this, $oldid, &$notices ) );
+               Hooks::run( 'TitleGetEditNotices', array( $this, $oldid, &$notices ) );
                return $notices;
        }
 }