+#!/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 => "sessioncgi", id => "editpage", call => \&IkiWiki::cgi_editpage);
+} # }}}
+
+sub getsetup () { #{{{
+ return
+ plugin => {
+ safe => 1,
+ rebuild => 1,
+ },
+} #}}}
+
+# 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 ($$$;$) { #{{{
+ my $page=shift;
+ my $q=shift;
+ my $session=shift;
+ my $nonfatal=shift;
+
+ my $canedit;
+ run_hooks(canedit => sub {
+ return if defined $canedit;
+ my $ret=shift->($page, $q, $session);
+ if (defined $ret) {
+ if ($ret eq "") {
+ $canedit=1;
+ }
+ elsif (ref $ret eq 'CODE') {
+ $ret->() unless $nonfatal;
+ $canedit=0;
+ }
+ elsif (defined $ret) {
+ error($ret) unless $nonfatal;
+ $canedit=0;
+ }
+ }
+ });
+ return $canedit;
+} #}}}
+
+sub cgi_editpage ($$) { #{{{
+ 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"),
+ wikiname => $config{wikiname},
+ );
+
+ decode_form_utf8($form);
+ run_hooks(formbuilder_setup => sub {
+ shift->(form => $form, cgi => $q, session => $session,
+ buttons => \@buttons);
+ });
+ decode_form_utf8($form);
+
+ # This untaint is safe because we check file_pruned.
+ my $page=$form->field('page');
+ $page=possibly_foolish_untaint($page);
+ my $absolute=($page =~ s#^/+##);
+ if (! defined $page || ! length $page ||
+ file_pruned($page, $config{srcdir})) {
+ error("bad page name");
+ }
+
+ my $baseurl=$config{url}."/".htmlpage($page);
+
+ 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;
+ $file=$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, "$config{url}/".htmlpage($from));
+ }
+ elsif ($form->field("do") eq "create") {
+ redirect($q, $config{url});
+ }
+ else {
+ redirect($q, "$config{url}/".htmlpage($page));
+ }
+ exit;
+ }
+ elsif ($form->submitted eq "Preview") {
+ my $new=not exists $pagesources{$page};
+ if ($new) {
+ # temporarily record its type
+ $pagesources{$page}=$page.".".$type;
+ }
+
+ 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
+ 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 ||
+ $form->submitted eq "Preview") {
+ @page_locs=$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, "$config{url}/".htmlpage($page));
+ 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);
+
+ # The session id is stored on the form and checked to
+ # guard against CSRF. But only if the user is logged in,
+ # as anonok can allow anonymous edits.
+ if (defined $session->param("name")) {
+ my $sid=$q->param('sid');
+ if (! defined $sid || $sid ne $session->id) {
+ error(gettext("Your login session has expired."));
+ }
+ }
+
+ 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 $content=$form->field('editcontent');
+ 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}) {
+ my $message="";
+ if (defined $form->field('comments') &&
+ length $form->field('comments')) {
+ $message=$form->field('comments');
+ }
+
+ 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, "$config{url}/".htmlpage($page)."?updated");
+ }
+ }
+
+ exit;
+} #}}}
+
+1