ikiwiki/IkiWiki/Plugin/editpage.pm

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Perl
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#!/usr/bin/perl
package IkiWiki::Plugin::editpage;
use warnings;
use strict;
use IkiWiki;
use open qw{:utf8 :std};
sub import {
hook(type => "getsetup", id => "editpage", call => \&getsetup);
hook(type => "refresh", id => "editpage", call => \&refresh);
hook(type => "sessioncgi", id => "editpage", call => \&IkiWiki::cgi_editpage);
}
sub getsetup () {
return
plugin => {
safe => 1,
rebuild => 1,
},
}
sub refresh () {
if (exists $wikistate{editpage} && exists $wikistate{editpage}{previews}) {
# Expire old preview files after one hour.
my $expire=time - (60 * 60);
my @previews;
foreach my $file (@{$wikistate{editpage}{previews}}) {
my $mtime=(stat("$config{destdir}/$file"))[9];
if (defined $mtime && $mtime <= $expire) {
# Avoid deleting a preview that was later saved.
my $delete=1;
foreach my $page (keys %renderedfiles) {
if (grep { $_ eq $file } @{$renderedfiles{$page}}) {
$delete=0;
}
}
if ($delete) {
debug(sprintf(gettext("removing old preview %s"), $file));
IkiWiki::prune("$config{destdir}/$file");
}
}
elsif (defined $mtime) {
push @previews, $file;
}
}
$wikistate{editpage}{previews}=\@previews;
}
}
# Back to ikiwiki namespace for the rest, this code is very much
# internal to ikiwiki even though it's separated into a plugin,
# and other plugins use the functions below.
package IkiWiki;
sub check_canedit ($$$;$) {
my $page=shift;
my $q=shift;
my $session=shift;
my $nonfatal=shift;
my $canedit;
run_hooks(canedit => sub {
return if defined $canedit;
my $ret=shift->($page, $q, $session);
if (defined $ret) {
if ($ret eq "") {
$canedit=1;
}
elsif (ref $ret eq 'CODE') {
$ret->() unless $nonfatal;
$canedit=0;
}
elsif (defined $ret) {
error($ret) unless $nonfatal;
$canedit=0;
}
}
});
return defined $canedit ? $canedit : 1;
}
sub check_content (@) {
my %params=@_;
return 1 if ! exists $hooks{checkcontent}; # optimisation
if (exists $pagesources{$params{page}}) {
my @diff;
my %old=map { $_ => 1 }
split("\n", readfile(srcfile($pagesources{$params{page}})));
foreach my $line (split("\n", $params{content})) {
push @diff, $line if ! exists $old{$_};
}
$params{content}=join("\n", @diff);
}
my $ok;
run_hooks(checkcontent => sub {
return if defined $ok;
my $ret=shift->(%params);
if (defined $ret) {
if ($ret eq "") {
$ok=1;
}
elsif (ref $ret eq 'CODE') {
$ret->() unless $params{nonfatal};
$ok=0;
}
elsif (defined $ret) {
error($ret) unless $params{nonfatal};
$ok=0;
}
}
});
return defined $ok ? $ok : 1;
}
sub cgi_editpage ($$) {
my $q=shift;
my $session=shift;
my $do=$q->param('do');
return unless $do eq 'create' || $do eq 'edit';
decode_cgi_utf8($q);
my @fields=qw(do rcsinfo subpage from page type editcontent comments);
my @buttons=("Save Page", "Preview", "Cancel");
eval q{use CGI::FormBuilder};
error($@) if $@;
my $form = CGI::FormBuilder->new(
fields => \@fields,
charset => "utf-8",
method => 'POST',
required => [qw{editcontent}],
javascript => 0,
params => $q,
action => $config{cgiurl},
header => 0,
table => 0,
template => scalar template_params("editpage.tmpl"),
);
decode_form_utf8($form);
run_hooks(formbuilder_setup => sub {
shift->(form => $form, cgi => $q, session => $session,
buttons => \@buttons);
});
decode_form_utf8($form);
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# This untaint is safe because we check file_pruned and
# wiki_file_regexp.
my ($page)=$form->field('page')=~/$config{wiki_file_regexp}/;
$page=possibly_foolish_untaint($page);
my $absolute=($page =~ s#^/+##);
if (! defined $page || ! length $page ||
file_pruned($page, $config{srcdir})) {
error(gettext("bad page name"));
}
my $baseurl = urlto($page, undef, 1);
my $from;
if (defined $form->field('from')) {
($from)=$form->field('from')=~/$config{wiki_file_regexp}/;
}
my $file;
my $type;
if (exists $pagesources{$page} && $form->field("do") ne "create") {
$file=$pagesources{$page};
$type=pagetype($file);
if (! defined $type || $type=~/^_/) {
error(sprintf(gettext("%s is not an editable page"), $page));
}
if (! $form->submitted) {
$form->field(name => "rcsinfo",
value => rcs_prepedit($file), force => 1);
}
$form->field(name => "editcontent", validate => '/.*/');
}
else {
$type=$form->param('type');
if (defined $type && length $type && $hooks{htmlize}{$type}) {
$type=possibly_foolish_untaint($type);
}
elsif (defined $from && exists $pagesources{$from}) {
# favor the type of linking page
$type=pagetype($pagesources{$from});
}
$type=$config{default_pageext} unless defined $type;
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$file=newpagefile($page, $type);
if (! $form->submitted) {
$form->field(name => "rcsinfo", value => "", force => 1);
}
$form->field(name => "editcontent", validate => '/.+/');
}
$form->field(name => "do", type => 'hidden');
$form->field(name => "sid", type => "hidden", value => $session->id,
force => 1);
$form->field(name => "from", type => 'hidden');
$form->field(name => "rcsinfo", type => 'hidden');
$form->field(name => "subpage", type => 'hidden');
$form->field(name => "page", value => $page, force => 1);
$form->field(name => "type", value => $type, force => 1);
$form->field(name => "comments", type => "text", size => 80);
$form->field(name => "editcontent", type => "textarea", rows => 20,
cols => 80);
$form->tmpl_param("can_commit", $config{rcs});
$form->tmpl_param("indexlink", indexlink());
$form->tmpl_param("helponformattinglink",
htmllink($page, $page, "ikiwiki/formatting",
noimageinline => 1,
linktext => "FormattingHelp"));
if ($form->submitted eq "Cancel") {
if ($form->field("do") eq "create" && defined $from) {
redirect($q, urlto($from, undef, 1));
}
elsif ($form->field("do") eq "create") {
redirect($q, $config{url});
}
else {
redirect($q, urlto($page, undef, 1));
}
exit;
}
elsif ($form->submitted eq "Preview") {
my $new=not exists $pagesources{$page};
if ($new) {
# temporarily record its type
$pagesources{$page}=$page.".".$type;
}
my %wasrendered=map { $_ => 1 } @{$renderedfiles{$page}};
my $content=$form->field('editcontent');
run_hooks(editcontent => sub {
$content=shift->(
content => $content,
page => $page,
cgi => $q,
session => $session,
);
});
my $preview=htmlize($page, $page, $type,
linkify($page, $page,
preprocess($page, $page,
filter($page, $page, $content), 0, 1)));
run_hooks(format => sub {
$preview=shift->(
page => $page,
content => $preview,
);
});
$form->tmpl_param("page_preview", $preview);
if ($new) {
delete $pagesources{$page};
}
# Previewing may have created files on disk.
# Keep a list of these to be deleted later.
my %previews = map { $_ => 1 } @{$wikistate{editpage}{previews}};
foreach my $f (@{$renderedfiles{$page}}) {
$previews{$f}=1 unless $wasrendered{$f};
}
@{$wikistate{editpage}{previews}} = keys %previews;
$renderedfiles{$page}=[keys %wasrendered];
saveindex();
}
elsif ($form->submitted eq "Save Page") {
$form->tmpl_param("page_preview", "");
}
if ($form->submitted ne "Save Page" || ! $form->validate) {
if ($form->field("do") eq "create") {
my @page_locs;
my $best_loc;
if (! defined $from || ! length $from ||
$from ne $form->field('from') ||
file_pruned($from, $config{srcdir}) ||
$from=~/^\// ||
$absolute ||
$form->submitted) {
@page_locs=$best_loc=$page;
}
else {
my $dir=$from."/";
$dir=~s![^/]+/+$!!;
if ((defined $form->field('subpage') && length $form->field('subpage')) ||
$page eq gettext('discussion')) {
$best_loc="$from/$page";
}
else {
$best_loc=$dir.$page;
}
push @page_locs, $dir.$page;
push @page_locs, "$from/$page";
while (length $dir) {
$dir=~s![^/]+/+$!!;
push @page_locs, $dir.$page;
}
push @page_locs, "$config{userdir}/$page"
if length $config{userdir};
}
@page_locs = grep {
! exists $pagecase{lc $_}
} @page_locs;
if (! @page_locs) {
# hmm, someone else made the page in the
# meantime?
if ($form->submitted eq "Preview") {
# let them go ahead with the edit
# and resolve the conflict at save
# time
@page_locs=$page;
}
else {
redirect($q, urlto($page, undef, 1));
exit;
}
}
my @editable_locs = grep {
check_canedit($_, $q, $session, 1)
} @page_locs;
if (! @editable_locs) {
# let it throw an error this time
map { check_canedit($_, $q, $session) } @page_locs;
}
my @page_types;
if (exists $hooks{htmlize}) {
@page_types=grep { !/^_/ }
keys %{$hooks{htmlize}};
}
$form->tmpl_param("page_select", 1);
$form->field(name => "page", type => 'select',
options => [ map { [ $_, pagetitle($_, 1) ] } @editable_locs ],
value => $best_loc);
$form->field(name => "type", type => 'select',
options => \@page_types);
$form->title(sprintf(gettext("creating %s"), pagetitle($page)));
}
elsif ($form->field("do") eq "edit") {
check_canedit($page, $q, $session);
if (! defined $form->field('editcontent') ||
! length $form->field('editcontent')) {
my $content="";
if (exists $pagesources{$page}) {
$content=readfile(srcfile($pagesources{$page}));
$content=~s/\n/\r\n/g;
}
$form->field(name => "editcontent", value => $content,
force => 1);
}
$form->tmpl_param("page_select", 0);
$form->field(name => "page", type => 'hidden');
$form->field(name => "type", type => 'hidden');
$form->title(sprintf(gettext("editing %s"), pagetitle($page)));
}
showform($form, \@buttons, $session, $q, forcebaseurl => $baseurl);
}
else {
# save page
check_canedit($page, $q, $session);
checksessionexpiry($q, $session, $q->param('sid'));
my $exists=-e "$config{srcdir}/$file";
if ($form->field("do") ne "create" && ! $exists &&
! defined srcfile($file, 1)) {
$form->tmpl_param("message", template("editpagegone.tmpl")->output);
$form->field(name => "do", value => "create", force => 1);
$form->tmpl_param("page_select", 0);
$form->field(name => "page", type => 'hidden');
$form->field(name => "type", type => 'hidden');
$form->title(sprintf(gettext("editing %s"), $page));
showform($form, \@buttons, $session, $q, forcebaseurl => $baseurl);
exit;
}
elsif ($form->field("do") eq "create" && $exists) {
$form->tmpl_param("message", template("editcreationconflict.tmpl")->output);
$form->field(name => "do", value => "edit", force => 1);
$form->tmpl_param("page_select", 0);
$form->field(name => "page", type => 'hidden');
$form->field(name => "type", type => 'hidden');
$form->title(sprintf(gettext("editing %s"), $page));
$form->field("editcontent",
value => readfile("$config{srcdir}/$file").
"\n\n\n".$form->field("editcontent"),
force => 1);
showform($form, \@buttons, $session, $q, forcebaseurl => $baseurl);
exit;
}
my $message="";
if (defined $form->field('comments') &&
length $form->field('comments')) {
$message=$form->field('comments');
}
my $content=$form->field('editcontent');
check_content(content => $content, page => $page,
cgi => $q, session => $session,
subject => $message);
run_hooks(editcontent => sub {
$content=shift->(
content => $content,
page => $page,
cgi => $q,
session => $session,
);
});
$content=~s/\r\n/\n/g;
$content=~s/\r/\n/g;
$content.="\n" if $content !~ /\n$/;
$config{cgi}=0; # avoid cgi error message
eval { writefile($file, $config{srcdir}, $content) };
$config{cgi}=1;
if ($@) {
$form->field(name => "rcsinfo", value => rcs_prepedit($file),
force => 1);
my $mtemplate=template("editfailedsave.tmpl");
$mtemplate->param(error_message => $@);
$form->tmpl_param("message", $mtemplate->output);
$form->field("editcontent", value => $content, force => 1);
$form->tmpl_param("page_select", 0);
$form->field(name => "page", type => 'hidden');
$form->field(name => "type", type => 'hidden');
$form->title(sprintf(gettext("editing %s"), $page));
showform($form, \@buttons, $session, $q,
forcebaseurl => $baseurl);
exit;
}
my $conflict;
if ($config{rcs}) {
if (! $exists) {
rcs_add($file);
}
# Prevent deadlock with post-commit hook by
# signaling to it that it should not try to
# do anything.
disable_commit_hook();
$conflict=rcs_commit($file, $message,
$form->field("rcsinfo"),
$session->param("name"), $ENV{REMOTE_ADDR});
enable_commit_hook();
rcs_update();
}
# Refresh even if there was a conflict, since other changes
# may have been committed while the post-commit hook was
# disabled.
require IkiWiki::Render;
refresh();
saveindex();
if (defined $conflict) {
$form->field(name => "rcsinfo", value => rcs_prepedit($file),
force => 1);
$form->tmpl_param("message", template("editconflict.tmpl")->output);
$form->field("editcontent", value => $conflict, force => 1);
$form->field("do", "edit", force => 1);
$form->tmpl_param("page_select", 0);
$form->field(name => "page", type => 'hidden');
$form->field(name => "type", type => 'hidden');
$form->title(sprintf(gettext("editing %s"), $page));
showform($form, \@buttons, $session, $q,
forcebaseurl => $baseurl);
}
else {
# The trailing question mark tries to avoid broken
# caches and get the most recent version of the page.
redirect($q, urlto($page, undef, 1)."?updated");
}
}
exit;
}
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