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ikiwiki/doc/patchqueue/move_page.mdwn

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This is my second cut at a feature like that requested in [[todo/Moving_Pages]].
It can also be found [here](http://ikidev.betacantrips.com/patches/move.patch).
A few shortcomings exist:
* No precautions whatsoever are made to protect against race conditions or failures
in the rcs\_move function. I didn't even do the `cgi_editpage` thing where I hold
the lock and render afterwards (mostly because the copy I was editing was not
up-to-date enough to have that code). Although FAILED_SAVE is in movepage.tmpl,
no code activates it yet.
* Some code is duplicated between cgi\_movepage and cgi\_editpage, as well
as rcs\_commit and rcs\_move.
* The user interface is pretty lame. I couldn't figure out a good way to let
the user specify which directory to move things to without implementing a
FileChooser thing.
* No redirect pages like those mentioned on [[todo/Moving_Pages]] exist yet,
so none are created.
* I added a Move link to page.tmpl but it may belong better someplace else --
maybe editpage.tmpl? Not sure.
* from is redundant with page so far -- but since the Move links could someday
come from someplace other than the page itself I kept it around.
* If I move foo.mdwn to bar.mdwn, foo/* should move too, probably.
> Looks like a good start, although I agree about many of the points above,
> and also feel that something needs to be done about rcses that don't
> implement a move operation -- falling back to an add and delete.
> --[[Joey]]
Hmm. Shouldn't that be done on a by-RCS basis, though? (i.e. implemented
by backends in the `rcs_move` function)
> Probably, yes, but maybe there's a way to avoid duplicating code for that
> in several of them.
Also, how should ikiwiki react if a page is edited (say, by another user)
before it is moved? Bail, or shrug and proceed?
> The important thing is to keep in mind that the page could be edited,
> moved, deleted, etc in between the user starting the move and the move
> happening. So, the code really needs to deal with all of these cases in
> some way. It seems fine to me to go ahead with the move even if the page
> was edited. If the page was deleted or moved, it seems reasonable to exit
> with an error.
diff -urNX ignorepats ikiwiki/IkiWiki/CGI.pm ikidev/IkiWiki/CGI.pm
--- ikiwiki/IkiWiki/CGI.pm 2007-02-14 18:17:12.000000000 -0800
+++ ikidev/IkiWiki/CGI.pm 2007-02-22 18:54:23.194982000 -0800
@@ -561,6 +561,106 @@
}
} #}}}
+sub cgi_movepage($$) {
+ my $q = shift;
+ my $session = shift;
+ eval q{use CGI::FormBuilder};
+ error($@) if $@;
+ my @fields=qw(do from rcsinfo page newdir newname comments);
+ my @buttons=("Rename Page", "Cancel");
+
+ my $form = CGI::FormBuilder->new(
+ fields => \@fields,
+ header => 1,
+ charset => "utf-8",
+ method => 'POST',
+ action => $config{cgiurl},
+ template => (-e "$config{templatedir}/movepage.tmpl" ?
+ {template_params("movepage.tmpl")} : ""),
+ );
+ run_hooks(formbuilder_setup => sub {
+ shift->(form => $form, cgi => $q, session => $session);
+ });
+
+ decode_form_utf8($form);
+
+ # This untaint is safe because if the page doesn't exist, bail.
+ my $page = $form->field('page');
+ $page = possibly_foolish_untaint($page);
+ if (! exists $pagesources{$page}) {
+ error("page does not exist");
+ }
+ my $file=$pagesources{$page};
+ my $type=pagetype($file);
+
+ my $from;
+ if (defined $form->field('from')) {
+ ($from)=$form->field('from')=~/$config{wiki_file_regexp}/;
+ }
+
+ $form->field(name => "do", type => 'hidden');
+ $form->field(name => "from", type => 'hidden');
+ $form->field(name => "rcsinfo", type => 'hidden');
+ $form->field(name => "newdir", type => 'text', size => 80);
+ $form->field(name => "page", value => $page, force => 1);
+ $form->field(name => "newname", type => "text", size => 80);
+ $form->field(name => "comments", type => "text", size => 80);
+ $form->tmpl_param("can_commit", $config{rcs});
+ $form->tmpl_param("indexlink", indexlink());
+ $form->tmpl_param("baseurl", baseurl());
+
+ if (! $form->submitted) {
+ $form->field(name => "rcsinfo", value => rcs_prepedit($file),
+ force => 1);
+ }
+
+ if ($form->submitted eq "Cancel") {
+ redirect($q, "$config{url}/".htmlpage($page));
+ return;
+ }
+
+ if (! $form->submitted || ! $form->validate) {
+ check_canedit($page, $q, $session);
+ $form->tmpl_param("page_select", 0);
+ $form->field(name => "page", type => 'hidden');
+ $form->field(name => "type", type => 'hidden');
+ $form->title(sprintf(gettext("moving %s"), pagetitle($page)));
+ my $pname = basename($page);
+ my $dname = dirname($page);
+ if (! defined $form->field('newname') ||
+ ! length $form->field('newname')) {
+ $form->field(name => "newname",
+ value => pagetitle($pname, 1), force => 1);
+ }
+ if (! defined $form->field('newdir') ||
+ ! length $form->field('newdir')) {
+ $form->field(name => "newdir",
+ value => pagetitle($dname, 1), force => 1);
+ }
+ print $form->render(submit => \@buttons);
+ }
+ else{
+ # This untaint is safe because titlepage removes any problematic
+ # characters.
+ my ($newname)=$form->field('newname');
+ $newname=titlepage(possibly_foolish_untaint($newname));
+ my ($newdir)=$form->field('newdir');
+ $newdir=titlepage(possibly_foolish_untaint($newdir));
+ if (! defined $newname || ! length $newname || file_pruned($newname, $config{srcdir}) || $newname=~/^\//) {
+ error("bad page name");
+ }
+ check_canedit($page, $q, $session);
+
+ my $newpage = ($newdir?"$newdir/":"") . $newname;
+ my $newfile = $newpage . ".$type";
+ my $message = $form->field('comments');
+ unlockwiki();
+ rcs_move($file, $newfile, $message, $form->field("rcsinfo"),
+ $session->param("name"), $ENV{REMOTE_ADDR});
+ redirect($q, "$config{url}/".htmlpage($newpage));
+ }
+}
+
sub cgi_getsession ($) { #{{{
my $q=shift;
@@ -656,6 +756,9 @@
elsif (defined $session->param("postsignin")) {
cgi_postsignin($q, $session);
}
+ elsif ($do eq 'move') {
+ cgi_movepage($q, $session);
+ }
elsif ($do eq 'prefs') {
cgi_prefs($q, $session);
}
diff -urNX ignorepats ikiwiki/IkiWiki/Rcs/svn.pm ikidev/IkiWiki/Rcs/svn.pm
--- ikiwiki/IkiWiki/Rcs/svn.pm 2007-01-27 16:04:48.000000000 -0800
+++ ikidev/IkiWiki/Rcs/svn.pm 2007-02-22 01:51:29.923626000 -0800
@@ -60,6 +60,34 @@
}
} #}}}
+sub rcs_move ($$$$;$$) {
+ my $file=shift;
+ my $newname=shift;
+ my $message=shift;
+ my $rcstoken=shift;
+ my $user=shift;
+ my $ipaddr=shift;
+ if (defined $user) {
+ $message="web commit by $user".(length $message ? ": $message" : "");
+ }
+ elsif (defined $ipaddr) {
+ $message="web commit from $ipaddr".(length $message ? ": $message" : "");
+ }
+
+ chdir($config{srcdir}); # svn merge wants to be here
+
+ if (system("svn", "move", "--quiet",
+ "$file", "$newname") != 0) {
+ return 1;
+ }
+ if (system("svn", "commit", "--quiet",
+ "--encoding", "UTF-8", "-m",
+ possibly_foolish_untaint($message)) != 0) {
+ return 1;
+ }
+ return undef # success
+}
+
sub rcs_commit ($$$;$$) { #{{{
# Tries to commit the page; returns undef on _success_ and
# a version of the page with the rcs's conflict markers on failure.
diff -urNX ignorepats ikiwiki/IkiWiki/Render.pm ikidev/IkiWiki/Render.pm
--- ikiwiki/IkiWiki/Render.pm 2007-02-14 17:00:05.000000000 -0800
+++ ikidev/IkiWiki/Render.pm 2007-02-22 18:30:00.451755000 -0800
@@ -80,6 +80,7 @@
if (length $config{cgiurl}) {
$template->param(editurl => cgiurl(do => "edit", page => $page));
+ $template->param(moveurl => cgiurl(do => "move", page => $page));
$template->param(prefsurl => cgiurl(do => "prefs"));
if ($config{rcs}) {
$template->param(recentchangesurl => cgiurl(do => "recentchanges"));
diff -urNX ignorepats ikiwiki/templates/movepage.tmpl ikidev/templates/movepage.tmpl
--- ikiwiki/templates/movepage.tmpl 1969-12-31 16:00:00.000000000 -0800
+++ ikidev/templates/movepage.tmpl 2007-02-22 18:40:39.751763000 -0800
@@ -0,0 +1,44 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+ "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<head>
+<base href="<TMPL_VAR BASEURL>" />
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
+<title><TMPL_VAR FORM-TITLE></title>
+<link rel="stylesheet" href="<TMPL_VAR BASEURL>style.css" type="text/css" />
+<link rel="stylesheet" href="<TMPL_VAR BASEURL>local.css" type="text/css" />
+<TMPL_IF NAME="FAVICON">
+<link rel="icon" href="<TMPL_VAR BASEURL><TMPL_VAR FAVICON>" type="image/x-icon" />
+</TMPL_IF>
+</head>
+<body>
+<TMPL_IF NAME="FAILED_SAVE">
+<p>
+<b>Failed to save your changes.</b>
+</p>
+<p>
+Your changes were not able to be saved to disk. The system gave the error:
+<blockquote>
+<TMPL_VAR ERROR_MESSAGE>
+</blockquote>
+Your changes are preserved below, and you can try again to save them.
+</p>
+</TMPL_IF>
+<TMPL_VAR FORM-START>
+<div class="header">
+<span><TMPL_VAR INDEXLINK>/ <TMPL_VAR FORM-TITLE></span>
+</div>
+<TMPL_VAR FIELD-DO>
+<TMPL_VAR FIELD-FROM>
+<TMPL_VAR FIELD-RCSINFO>
+<TMPL_VAR FIELD-PAGE>
+New location: <TMPL_VAR FIELD-NEWDIR>/ <TMPL_VAR FIELD-NEWNAME>
+<br />
+<TMPL_IF NAME="CAN_COMMIT">
+Optional comment about this change:<br />
+<TMPL_VAR FIELD-COMMENTS><br />
+</TMPL_IF>
+<input id="_submit" name="_submit" type="submit" value="Rename Page" /><input id="_submit_2" name="_submit" type="submit" value="Cancel" />
+<TMPL_VAR FORM-END>
+</body>
+</html>
diff -urNX ignorepats ikiwiki/templates/page.tmpl ikidev/templates/page.tmpl
--- ikiwiki/templates/page.tmpl 2006-12-28 12:27:01.000000000 -0800
+++ ikidev/templates/page.tmpl 2007-02-22 01:52:33.078464000 -0800
@@ -32,6 +32,9 @@
<TMPL_IF NAME="EDITURL">
<li><a href="<TMPL_VAR EDITURL>">Edit</a></li>
</TMPL_IF>
+<TMPL_IF NAME="MOVEURL">
+<li><a href="<TMPL_VAR MOVEURL>">Move</a></li>
+</TMPL_IF>
<TMPL_IF NAME="RECENTCHANGESURL">
<li><a href="<TMPL_VAR RECENTCHANGESURL>">RecentChanges</a></li>
</TMPL_IF>
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