From e67d86ac64f10e2aec83b62b7b68cd5753599dad Mon Sep 17 00:00:00 2001
From: Magnus Manske <magnusmanske@users.mediawiki.org>
Date: Sun, 1 Jul 2007 13:26:57 +0000
Subject: [PATCH] New javascript for upload page that will show a warning if a
 file with the "destination filename" already exists. This uses api.php. As it
 is only used after someone already specified a file to upload, stress to
 servers should be minimal. Note that there is a hardcoded English warning
 text in there; not sure how to i18e it.

---
 RELEASE-NOTES              |  1 +
 includes/SpecialUpload.php |  2 +-
 skins/common/wikibits.js   | 36 ++++++++++++++++++++++++++++++++++++
 3 files changed, 38 insertions(+), 1 deletion(-)

diff --git a/RELEASE-NOTES b/RELEASE-NOTES
index 0a681dae39..1185fbba28 100644
--- a/RELEASE-NOTES
+++ b/RELEASE-NOTES
@@ -114,6 +114,7 @@ it from source control: http://www.mediawiki.org/wiki/Download_from_SVN
   Patch by Edward Z. Yang.
 * Introduce 'ShowRawCssJs' hook; see docs/hooks.txt for more information
 * (bug 10404) Show rights log fragment for the selected user in Special:Userrights
+* New javascript for upload page that will show a warning if a file with the "destination filename" already exists.
 
 == Bugfixes since 1.10 ==
 
diff --git a/includes/SpecialUpload.php b/includes/SpecialUpload.php
index 28cd820da9..2922d15de7 100644
--- a/includes/SpecialUpload.php
+++ b/includes/SpecialUpload.php
@@ -791,7 +791,7 @@ class UploadForm {
 		<tr>
 			<td align='right'><label for='wpDestFile'>{$destfilename}:</label></td>
 			<td align='left'>
-				<input tabindex='2' type='text' name='wpDestFile' id='wpDestFile' size='40' value="$encDestName" />
+				<input tabindex='2' type='text' name='wpDestFile' id='wpDestFile' size='40' value="$encDestName" onkeyup="checkFileExists();" />
 			</td>
 		</tr>
 		<tr>
diff --git a/skins/common/wikibits.js b/skins/common/wikibits.js
index 496112711e..7cbe0038c8 100644
--- a/skins/common/wikibits.js
+++ b/skins/common/wikibits.js
@@ -766,6 +766,41 @@ function toggle_element_check(ida,idb) {
 	document.getElementById(idb).checked=false;
 }
 
+var lastFileChecked = "" ;
+function checkFileExists () {
+  // Find file to upload
+	var destFile = document.getElementById('wpDestFile');
+	if ( !destFile ) return ;
+	fname = destFile.value ;
+	
+	if ( fname == lastFileChecked ) return ;
+	lastFileChecked = fname ;
+	
+	// Delete old warning, if any
+  var existsWarning = document.getElementById('existsWarning');
+  if ( existsWarning ) {
+    var pn = existsWarning.parentNode ;
+    pn.removeChild ( existsWarning ) ;
+  }
+  
+  // Check for existence
+  var url = wgServer + wgScriptPath + "/api.php?action=query&prop=info&format=xml&titles=Image:" + fname ;
+  var xmlHttp = new XMLHttpRequest();
+  xmlHttp.open('GET', url, false);
+  xmlHttp.send(null);  
+  var text = xmlHttp.responseText ;
+  if ( text.split(" pageid=").length < 2 ) return ; // Page doesn'exist (test is quicker than XML parsing, so...)
+  
+  // Set warning
+  var thetd = destFile.parentNode ;
+//  thetd.innerHTML += url ;
+  thetd.innerHTML += "<span id='existsWarning' style='color:red'> A file with this name already exists; uploading under the same name will replace it!</span>" ;
+  
+  // Restore the filename
+  var destFile = document.getElementById('wpDestFile');
+  destFile.value = fname;
+}
+
 function fillDestFilename(id) {
 	if (!document.getElementById) {
 		return;
@@ -790,6 +825,7 @@ function fillDestFilename(id) {
 	var destFile = document.getElementById('wpDestFile');
 	if (destFile) {
 		destFile.value = fname;
+		checkFileExists () ;
 	}
 }
 
-- 
2.20.1