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path: root/doc/patchqueue/disappearing_pages.mdwn
blob: d699d5b6c19a11e810bbd3860e95c6223a5c1d86 (plain)

If one user (via SVN or otherwise) deletes or moves a page while another user is editing it via the web, bad things happen. This patch addresses this by failing gracefully, and allowing the user to commit a new file with the same name if desired.

The patch is here. It requires a strip level of 4 -- sorry about that. There are also some other changes in the conflict-resolution section which seemed to make sense, let me know what you think. --Ethan

diff -urX /home/glasserc/ignorepats /home/glasserc/ikiclean/IkiWiki/CGI.pm /home/glasserc/ikidev/IkiWiki/CGI.pm
--- /home/glasserc/ikiclean/IkiWiki/CGI.pm	2007-02-11 21:40:32.419641000 -0800
+++ /home/glasserc/ikidev/IkiWiki/CGI.pm	2007-02-12 15:35:55.178886000 -0800
@@ -278,7 +278,7 @@
 	my $q=shift;
 	my $session=shift;
 
-	my @fields=qw(do rcsinfo subpage from page type editcontent comments);
+	my @fields=qw(do rcsinfo subpage from page type editcontent comments newfile);
 	my @buttons=("Save Page", "Preview", "Cancel");
 	
 	eval q{use CGI::FormBuilder};
@@ -340,10 +340,6 @@
 		$file=$page.".".$type;
 	}
 
-	my $newfile=0;
-	if (! -e "$config{srcdir}/$file") {
-		$newfile=1;
-	}
 
 	$form->field(name => "do", type => 'hidden');
 	$form->field(name => "from", type => 'hidden');
@@ -354,6 +350,7 @@
 	$form->field(name => "comments", type => "text", size => 80);
 	$form->field(name => "editcontent", type => "textarea", rows => 20,
 		cols => 80);
+	$form->field(name => "newfile", type => 'hidden');
 	$form->tmpl_param("can_commit", $config{rcs});
 	$form->tmpl_param("indexlink", indexlink());
 	$form->tmpl_param("helponformattinglink",
@@ -362,8 +359,12 @@
 	if (! $form->submitted) {
 		$form->field(name => "rcsinfo", value => rcs_prepedit($file),
 			force => 1);
+		$form->field(name => "newfile", 
+			     value => ! -e "$config{srcdir}/$file",
+			     force => 1);
 	}
-	
+	my $newfile = $form->field(name => "newfile");
+
 	if ($form->submitted eq "Cancel") {
 		if ($newfile && defined $from) {
 			redirect($q, "$config{url}/".htmlpage($from));
@@ -482,6 +485,16 @@
 	else {
 		# save page
 		check_canedit($page, $q, $session);
+		if (! -e "$config{srcdir}/$file" && ! $form->field(name => 'newfile')){
+			$form->tmpl_param("page_gone", 1);
+			$form->field(name => "newfile",
+				     value => 1, force => 1);
+			$form->tmpl_param("page_select", 0);
+			$form->field(name => "page", type => 'hidden');
+			$form->field(name => "type", type => 'hidden');
+			print $form->render(submit => \@buttons);
+			return;
+		}
 		
 		my $content=$form->field('editcontent');
 
@@ -512,8 +525,7 @@
 					force => 1);
 				$form->tmpl_param("page_conflict", 1);
 				$form->field("editcontent", value => $conflict, force => 1);
-				$form->field(name => "comments", value => $form->field('comments'), force => 1);
-				$form->field("do", "edit)");
+				$form->field("do", "edit");
 				$form->tmpl_param("page_select", 0);
 				$form->field(name => "page", type => 'hidden');
 				$form->field(name => "type", type => 'hidden');
diff -urX /home/glasserc/ignorepats /home/glasserc/ikiclean/templates/editpage.tmpl /home/glasserc/ikidev/templates/editpage.tmpl
--- /home/glasserc/ikiclean/templates/editpage.tmpl	2007-02-11 21:40:35.046470000 -0800
+++ /home/glasserc/ikidev/templates/editpage.tmpl	2007-02-12 15:33:38.503571000 -0800
@@ -21,6 +21,15 @@
 conflict and commit again to save your changes.
 </p>
 </TMPL_IF>
+<TMPL_IF NAME="PAGE_GONE">
+<p>
+<b>The page you were editing has disappeared.</b>
+</p>
+<p>
+Perhaps someone else has deleted it or moved it. If you want to recreate
+this page with your text, click "Save Page" again.
+</p>
+</TMPL_IF>
 <TMPL_VAR FORM-START>
 <div class="header">
 <span><TMPL_VAR INDEXLINK>/ <TMPL_VAR FORM-TITLE></span>
@@ -28,6 +37,7 @@
 <TMPL_VAR FIELD-DO>
 <TMPL_VAR FIELD-FROM>
 <TMPL_VAR FIELD-RCSINFO>
+<TMPL_VAR FIELD-NEWFILE>
 <TMPL_IF NAME="PAGE_SELECT">
 Page location: <TMPL_VAR FIELD-PAGE>
 Page type: <TMPL_VAR FIELD-TYPE>