From 483f85fcf84d7863b82815c6f700ca6039247e56 Mon Sep 17 00:00:00 2001
From: Victor Vasiliev <vasilievvv@users.mediawiki.org>
Date: Sat, 8 Dec 2007 18:30:00 +0000
Subject: [PATCH] Introduce an "AbortMove" hook

---
 RELEASE-NOTES                |  1 +
 docs/hooks.txt               |  6 ++++++
 includes/SpecialMovepage.php | 16 ++++++++++++++--
 includes/Title.php           |  6 ++++++
 4 files changed, 27 insertions(+), 2 deletions(-)

diff --git a/RELEASE-NOTES b/RELEASE-NOTES
index 3f4ce410a5..61dd6ae2a4 100644
--- a/RELEASE-NOTES
+++ b/RELEASE-NOTES
@@ -93,6 +93,7 @@ it from source control: http://www.mediawiki.org/wiki/Download_from_SVN
 * (bug 11810) Localize displayed semicolons
 * (bug 11657) Support for Thai solar calendar
 * (bug 943) RSS feed for Recentchangeslinked
+* Introduced AbortMove hook
 
 === Bug fixes in 1.12 ===
 
diff --git a/docs/hooks.txt b/docs/hooks.txt
index 65aa2db0be..feb14e92be 100644
--- a/docs/hooks.txt
+++ b/docs/hooks.txt
@@ -245,6 +245,12 @@ $password: the password being submitted, not yet checked for validity
           default is LoginForm::ABORTED. Note that the client may be using
           a machine API rather than the HTML user interface.
 
+'AbortMove': allows to abort moving an article (title)
+$old: old title
+$nt: new title
+$user: user who is doing the move
+$err: error message
+
 'AbortNewAccount': Return false to cancel account creation.
 $user: the User object about to be created (read-only, incomplete)
 $message: out parameter: error message to display on abort
diff --git a/includes/SpecialMovepage.php b/includes/SpecialMovepage.php
index cfc434ae5f..148923f9cc 100644
--- a/includes/SpecialMovepage.php
+++ b/includes/SpecialMovepage.php
@@ -65,7 +65,7 @@ class MovePageForm {
 		$this->watch = $wgRequest->getCheck( 'wpWatch' );
 	}
 
-	function showForm( $err ) {
+	function showForm( $err, $hookErr = '' ) {
 		global $wgOut, $wgUser, $wgContLang;
 		
 		$start = $wgContLang->isRTL() ? 'right' : 'left';
@@ -135,7 +135,13 @@ class MovePageForm {
 
 		if ( $err != '' ) {
 			$wgOut->setSubtitle( wfMsg( 'formerror' ) );
-			$wgOut->addWikiText( '<p class="error">' . wfMsg($err) . "</p>\n" );
+			$errMsg = "";
+			if( $err == 'hookaborted' ) {
+				$errMsg = $hookErr;
+			} else {
+				$errMsg = '<p class="error">' . wfMsgWikiHtml( $err ) . "</p>\n";
+			}
+			$wgOut->addHTML( $errMsg );
 		}
 
 		$moveTalkChecked = $this->moveTalk ? ' checked="checked"' : '';
@@ -216,6 +222,12 @@ class MovePageForm {
 			return;
 		}
 
+		$hookErr = null;
+		if( !wfRunHooks( 'AbortMove', array( $ot, $nt, $wgUser, &$hookErr ) ) ) {
+			$this->showForm( 'hookaborted', $hookErr );
+			return;
+		}
+
 		$error = $ot->moveTo( $nt, true, $this->reason );
 		if ( $error !== true ) {
 			$this->showForm( $error );
diff --git a/includes/Title.php b/includes/Title.php
index 9e361e233f..cf8e295ad2 100644
--- a/includes/Title.php
+++ b/includes/Title.php
@@ -2182,6 +2182,12 @@ class Title {
 			return 'protectedpage';
 		}
 
+		global $wgUser;
+		$err = null;
+		if( !wfRunHooks( 'AbortMove', array( $this, $nt, $wgUser, &$err ) ) ) {
+			return 'hookaborted';
+		}
+
 		# 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).
-- 
2.20.1