From a67f50cf39f4621417b8205fb874fcaec072f583 Mon Sep 17 00:00:00 2001
From: Brad Jorsch <bjorsch@wikimedia.org>
Date: Mon, 5 Aug 2013 11:26:49 -0400
Subject: [PATCH] API: DWIM for action=edit&section=new&appendtext=...

While it doesn't make a whole lot of sense to prepend or append with
section=new, the user certainly doesn't intend to be copying the
contents of section 0. In the spirit of "do what I mean", we should
probably prepend/append to empty text in this situation.

Bug: 52538
Change-Id: I9b03635906ca665a4f68b3bd35d05ae9108e2356
---
 RELEASE-NOTES-1.22           |  2 ++
 includes/api/ApiEditPage.php | 15 ++++++++++-----
 2 files changed, 12 insertions(+), 5 deletions(-)

diff --git a/RELEASE-NOTES-1.22 b/RELEASE-NOTES-1.22
index a36d8cfa41..51ea25464f 100644
--- a/RELEASE-NOTES-1.22
+++ b/RELEASE-NOTES-1.22
@@ -293,6 +293,8 @@ production.
   with the content.
 * (bug 51342) prop=imageinfo iicontinue now contains the dbkey, not the text
   version of the title.
+* (bug 52538) action=edit will now use empty text instead of the contents
+  of section 0 when passed prependtext or appendtext with section=new.
 
 === Languages updated in 1.22===
 
diff --git a/includes/api/ApiEditPage.php b/includes/api/ApiEditPage.php
index 22e4dedfe9..9c079da8f7 100644
--- a/includes/api/ApiEditPage.php
+++ b/includes/api/ApiEditPage.php
@@ -159,12 +159,17 @@ class ApiEditPage extends ApiBase {
 					$this->dieUsage( "Sections are not supported for this content model: $modelName.", 'sectionsnotsupported' );
 				}
 
-				// Process the content for section edits
-				$section = intval( $params['section'] );
-				$content = $content->getSection( $section );
+				if ( $params['section'] == 'new' ) {
+					// DWIM if they're trying to prepend/append to a new section.
+					$content = null;
+				} else {
+					// Process the content for section edits
+					$section = intval( $params['section'] );
+					$content = $content->getSection( $section );
 
-				if ( !$content ) {
-					$this->dieUsage( "There is no section {$section}.", 'nosuchsection' );
+					if ( !$content ) {
+						$this->dieUsage( "There is no section {$section}.", 'nosuchsection' );
+					}
 				}
 			}
 
-- 
2.20.1