simplify r107833 per CR, just use wfExpandUrl()
[lhc/web/wiklou.git] / includes / Revision.php
index 8009b81..075ea0e 100644 (file)
@@ -4,6 +4,23 @@
  * @todo document
  */
 class Revision {
+       protected $mId;
+       protected $mPage;
+       protected $mUserText;
+       protected $mOrigUserText;
+       protected $mUser;
+       protected $mMinorEdit;
+       protected $mTimestamp;
+       protected $mDeleted;
+       protected $mSize;
+       protected $mSha1;
+       protected $mParentId;
+       protected $mComment;
+       protected $mText;
+       protected $mTextRow;
+       protected $mTitle;
+       protected $mCurrent;
+
        const DELETED_TEXT = 1;
        const DELETED_COMMENT = 2;
        const DELETED_USER = 4;
@@ -106,7 +123,8 @@ class Revision {
                        'minor_edit' => $row->ar_minor_edit,
                        'text_id'    => isset( $row->ar_text_id ) ? $row->ar_text_id : null,
                        'deleted'    => $row->ar_deleted,
-                       'len'        => $row->ar_len
+                       'len'        => $row->ar_len,
+                       'sha1'       => isset( $row->ar_sha1 ) ? $row->ar_sha1 : null,
                );
                if ( isset( $row->ar_text ) && !$row->ar_text_id ) {
                        // Pre-1.5 ar_text row
@@ -276,11 +294,28 @@ class Revision {
                        $conditions,
                        __METHOD__,
                        array( 'LIMIT' => 1 ),
-                       array( 'page' => array( 'INNER JOIN', 'page_id = rev_page' ),
-                               'user' => array( 'LEFT JOIN', 'user_id = rev_user' ) )
+                       array( 'page' => self::pageJoinCond(), 'user' => self::userJoinCond() )
                );
        }
 
+       /**
+        * Return the value of a select() JOIN conds array for the user table.
+        * This will get user table rows for logged-in users.
+        * @return Array
+        */
+       public static function userJoinCond() {
+               return array( 'LEFT JOIN', array( 'rev_user != 0', 'user_id = rev_user' ) );
+       }
+
+       /**
+        * Return the value of a select() page conds array for the paeg table.
+        * This will assure that the revision(s) are not orphaned from live pages.
+        * @return Array
+        */
+       public static function pageJoinCond() {
+               return array( 'INNER JOIN', array( 'page_id = rev_page' ) );
+       }
+
        /**
         * Return the list of revision fields that should be selected to create
         * a new revision.
@@ -297,7 +332,8 @@ class Revision {
                        'rev_minor_edit',
                        'rev_deleted',
                        'rev_len',
-                       'rev_parent_id'
+                       'rev_parent_id',
+                       'rev_sha1'
                );
        }
 
@@ -305,7 +341,7 @@ class Revision {
         * Return the list of text fields that should be selected to read the
         * revision text
         */
-       static function selectTextFields() {
+       public static function selectTextFields() {
                return array(
                        'old_text',
                        'old_flags'
@@ -315,7 +351,7 @@ class Revision {
        /**
         * Return the list of page fields that should be selected from page table
         */
-       static function selectPageFields() {
+       public static function selectPageFields() {
                return array(
                        'page_namespace',
                        'page_title',
@@ -326,8 +362,8 @@ class Revision {
        /**
         * Return the list of user fields that should be selected from user table
         */
-       static function selectUserFields() {
-               return array( 'COALESCE(user_name,rev_user_text) AS rev_user_name' );
+       public static function selectUserFields() {
+               return array( 'user_name' );
        }
 
        /**
@@ -348,7 +384,7 @@ class Revision {
                        $this->mDeleted   = intval( $row->rev_deleted );
 
                        if( !isset( $row->rev_parent_id ) ) {
-                               $this->mParentId = is_null($row->rev_parent_id) ? null : 0;
+                               $this->mParentId = is_null( $row->rev_parent_id ) ? null : 0;
                        } else {
                                $this->mParentId  = intval( $row->rev_parent_id );
                        }
@@ -359,6 +395,12 @@ class Revision {
                                $this->mSize = intval( $row->rev_len );
                        }
 
+                       if ( !isset( $row->rev_sha1 ) ) {
+                               $this->mSha1 = null;
+                       } else {
+                               $this->mSha1 = $row->rev_sha1;
+                       }
+
                        if( isset( $row->page_latest ) ) {
                                $this->mCurrent = ( $row->rev_id == $row->page_latest );
                                $this->mTitle = Title::newFromRow( $row );
@@ -376,14 +418,17 @@ class Revision {
                                $this->mTextRow = null;
                        }
 
-                       if ( isset( $row->rev_user_name ) ) {
-                               $this->mUserText = $row->rev_user_name; // current user name
-                       } else { // fallback to rev_user_text
-                               $this->mUserText = $row->rev_user_text; // de-normalized
+                       // Use user_name for users and rev_user_text for IPs...
+                       $this->mUserText = null; // lazy load if left null
+                       if ( $this->mUser == 0 ) {
+                               $this->mUserText = $row->rev_user_text; // IP user
+                       } elseif ( isset( $row->user_name ) ) {
+                               $this->mUserText = $row->user_name; // logged-in user
                        }
+                       $this->mOrigUserText = $row->rev_user_text;
                } elseif( is_array( $row ) ) {
                        // Build a new revision to be saved...
-                       global $wgUser;
+                       global $wgUser; // ugh
 
                        $this->mId        = isset( $row['id']         ) ? intval( $row['id']         ) : null;
                        $this->mPage      = isset( $row['page']       ) ? intval( $row['page']       ) : null;
@@ -391,10 +436,11 @@ class Revision {
                        $this->mUserText  = isset( $row['user_text']  ) ? strval( $row['user_text']  ) : $wgUser->getName();
                        $this->mUser      = isset( $row['user']       ) ? intval( $row['user']       ) : $wgUser->getId();
                        $this->mMinorEdit = isset( $row['minor_edit'] ) ? intval( $row['minor_edit'] ) : 0;
-                       $this->mTimestamp = isset( $row['timestamp']  ) ? strval( $row['timestamp']  ) : wfTimestamp( TS_MW );
+                       $this->mTimestamp = isset( $row['timestamp']  ) ? strval( $row['timestamp']  ) : wfTimestampNow();
                        $this->mDeleted   = isset( $row['deleted']    ) ? intval( $row['deleted']    ) : 0;
                        $this->mSize      = isset( $row['len']        ) ? intval( $row['len']        ) : null;
                        $this->mParentId  = isset( $row['parent_id']  ) ? intval( $row['parent_id']  ) : null;
+                       $this->mSha1      = isset( $row['sha1']  )      ? strval( $row['sha1']  )      : null;
 
                        // Enforce spacing trimming on supplied text
                        $this->mComment   = isset( $row['comment']    ) ?  trim( strval( $row['comment'] ) ) : null;
@@ -403,9 +449,13 @@ class Revision {
 
                        $this->mTitle     = null; # Load on demand if needed
                        $this->mCurrent   = false;
-                       # If we still have no len_size, see it we have the text to figure it out
+                       # If we still have no length, see it we have the text to figure it out
                        if ( !$this->mSize ) {
-                               $this->mSize      = is_null( $this->mText ) ? null : strlen( $this->mText );
+                               $this->mSize = is_null( $this->mText ) ? null : strlen( $this->mText );
+                       }
+                       # Same for sha1
+                       if ( $this->mSha1 === null ) {
+                               $this->mSha1 = is_null( $this->mText ) ? null : self::base36Sha1( $this->mText );
                        }
                } else {
                        throw new MWException( 'Revision constructor passed invalid row format.' );
@@ -449,6 +499,15 @@ class Revision {
                return $this->mSize;
        }
 
+       /**
+        * Returns the base36 sha1 of the text in this revision, or null if unknown.
+        *
+        * @return String
+        */
+       public function getSha1() {
+               return $this->mSha1;
+       }
+
        /**
         * Returns the title of the page associated with this entry.
         *
@@ -540,7 +599,7 @@ class Revision {
                } elseif( $audience == self::FOR_THIS_USER && !$this->userCan( self::DELETED_USER, $user ) ) {
                        return '';
                } else {
-                       return $this->mUserText;
+                       return $this->getRawUserText();
                }
        }
 
@@ -550,6 +609,14 @@ class Revision {
         * @return String
         */
        public function getRawUserText() {
+               if ( $this->mUserText === null ) {
+                       $this->mUserText = User::whoIs( $this->mUser ); // load on demand
+                       if ( $this->mUserText === false ) {
+                               # This shouldn't happen, but it can if the wiki was recovered
+                               # via importing revs and there is no user table entry yet.
+                               $this->mUserText = $this->mOrigUserText;
+                       }
+               }
                return $this->mUserText;
        }
 
@@ -661,7 +728,7 @@ class Revision {
         * @return String
         */
        public function revText() {
-               wfDeprecated( __METHOD__ );
+               wfDeprecated( __METHOD__, '1.17' );
                return $this->getText( self::FOR_THIS_USER );
        }
 
@@ -911,8 +978,12 @@ class Revision {
                                'rev_timestamp'  => $dbw->timestamp( $this->mTimestamp ),
                                'rev_deleted'    => $this->mDeleted,
                                'rev_len'        => $this->mSize,
-                               'rev_parent_id'  => is_null($this->mParentId) ?
-                                       $this->getPreviousRevisionId( $dbw ) : $this->mParentId
+                               'rev_parent_id'  => is_null( $this->mParentId )
+                                       ? $this->getPreviousRevisionId( $dbw )
+                                       : $this->mParentId,
+                               'rev_sha1'       => is_null( $this->mSha1 )
+                                       ? Revision::base36Sha1( $this->mText )
+                                       : $this->mSha1
                        ), __METHOD__
                );
 
@@ -924,6 +995,15 @@ class Revision {
                return $this->mId;
        }
 
+       /**
+        * Get the base 36 SHA-1 value for a string of text
+        * @param $text String
+        * @return String
+        */
+       public static function base36Sha1( $text ) {
+               return wfBaseConvert( sha1( $text ), 16, 36, 31 );
+       }
+
        /**
         * Lazy-load the revision's text.
         * Currently hardcoded to the 'text' table storage engine.
@@ -1003,7 +1083,7 @@ class Revision {
 
                $current = $dbw->selectRow(
                        array( 'page', 'revision' ),
-                       array( 'page_latest', 'rev_text_id', 'rev_len' ),
+                       array( 'page_latest', 'rev_text_id', 'rev_len', 'rev_sha1' ),
                        array(
                                'page_id' => $pageId,
                                'page_latest=rev_id',
@@ -1017,7 +1097,8 @@ class Revision {
                                'minor_edit' => $minor,
                                'text_id'    => $current->rev_text_id,
                                'parent_id'  => $current->page_latest,
-                               'len'        => $current->rev_len
+                               'len'        => $current->rev_len,
+                               'sha1'       => $current->rev_sha1
                                ) );
                } else {
                        $revision = null;