380 lines
11 KiB
Perl
380 lines
11 KiB
Perl
#!/usr/bin/perl
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# Copyright © 2006-2008 Joey Hess <joey@ikiwiki.info>
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# Copyright © 2008 Simon McVittie <http://smcv.pseudorandom.co.uk/>
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# Licensed under the GNU GPL, version 2, or any later version published by the
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# Free Software Foundation
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package IkiWiki::Plugin::comments;
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use warnings;
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use strict;
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use IkiWiki 2.00;
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use constant PREVIEW => "Preview";
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use constant POST_COMMENT => "Post comment";
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use constant CANCEL => "Cancel";
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sub import { #{{{
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hook(type => "getsetup", id => 'comments', call => \&getsetup);
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hook(type => "preprocess", id => 'comments', call => \&preprocess);
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hook(type => "sessioncgi", id => 'comment', call => \&sessioncgi);
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hook(type => "htmlize", id => "_comment", call => \&htmlize);
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IkiWiki::loadplugin("inline");
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IkiWiki::loadplugin("mdwn");
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} # }}}
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sub htmlize { # {{{
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eval { use IkiWiki::Plugin::mdwn; };
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error($@) if ($@);
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return IkiWiki::Plugin::mdwn::htmlize(@_)
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} # }}}
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sub getsetup () { #{{{
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return
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plugin => {
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safe => 1,
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rebuild => undef,
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},
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} #}}}
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# Somewhat based on IkiWiki::Plugin::inline blog posting support
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sub preprocess (@) { #{{{
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my %params=@_;
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unless (length $config{cgiurl}) {
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error(gettext("[[!comments plugin requires CGI enabled]]"));
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}
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my $page = $params{page};
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$pagestate{$page}{comments}{comments} = defined $params{closed}
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? (not IkiWiki::yesno($params{closed}))
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: 1;
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$pagestate{$page}{comments}{allowhtml} = IkiWiki::yesno($params{allowhtml});
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$pagestate{$page}{comments}{allowdirectives} = IkiWiki::yesno($params{allowdirectives});
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$pagestate{$page}{comments}{commit} = defined $params{commit}
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? IkiWiki::yesno($params{commit})
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: 1;
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my $formtemplate = IkiWiki::template("comments_embed.tmpl",
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blind_cache => 1);
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$formtemplate->param(cgiurl => $config{cgiurl});
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$formtemplate->param(page => $params{page});
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if (not $pagestate{$page}{comments}{comments}) {
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$formtemplate->param("disabled" =>
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gettext('comments are closed'));
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}
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elsif ($params{preview}) {
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$formtemplate->param("disabled" =>
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gettext('not available during Preview'));
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}
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debug("page $params{page} => destpage $params{destpage}");
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my $posts = '';
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unless (defined $params{inline} && !IkiWiki::yesno($params{inline})) {
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eval { use IkiWiki::Plugin::inline; };
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error($@) if ($@);
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my @args = (
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pages => "internal($params{page}/_comment_*)",
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template => "comments_display",
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show => 0,
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reverse => "yes",
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# special stuff passed through
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page => $params{page},
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destpage => $params{destpage},
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preview => $params{preview},
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);
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push @args, atom => $params{atom} if defined $params{atom};
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push @args, rss => $params{rss} if defined $params{rss};
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push @args, feeds => $params{feeds} if defined $params{feeds};
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push @args, feedshow => $params{feedshow} if defined $params{feedshow};
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push @args, timeformat => $params{timeformat} if defined $params{timeformat};
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push @args, feedonly => $params{feedonly} if defined $params{feedonly};
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$posts = "\n" . IkiWiki::preprocess_inline(@args);
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}
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return $formtemplate->output . $posts;
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} # }}}
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# FIXME: logic taken from editpage, should be common code?
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sub getcgiuser ($) { # {{{
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my $session = shift;
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my $user = $session->param('name');
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$user = $ENV{REMOTE_ADDR} unless defined $user;
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debug("getcgiuser() -> $user");
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return $user;
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} # }}}
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# FIXME: logic adapted from recentchanges, should be common code?
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sub linkuser ($) { # {{{
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my $user = shift;
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my $oiduser = eval { IkiWiki::openiduser($user) };
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if (defined $oiduser) {
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return ($user, $oiduser);
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}
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else {
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my $page = bestlink('', (length $config{userdir}
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? "$config{userdir}/"
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: "").$user);
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return (urlto($page, undef, 1), $user);
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}
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} # }}}
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# FIXME: taken from IkiWiki::Plugin::editpage, should be common?
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sub checksessionexpiry ($$) { # {{{
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my $session = shift;
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my $sid = shift;
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if (defined $session->param("name")) {
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if (! defined $sid || $sid ne $session->id) {
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error(gettext("Your login session has expired."));
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}
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}
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} # }}}
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# Mostly cargo-culted from IkiWiki::plugin::editpage
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sub sessioncgi ($$) { #{{{
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my $cgi=shift;
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my $session=shift;
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my $do = $cgi->param('do');
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return unless $do eq 'comment';
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IkiWiki::decode_cgi_utf8($cgi);
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eval q{use CGI::FormBuilder};
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error($@) if $@;
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my @buttons = (POST_COMMENT, PREVIEW, CANCEL);
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my $form = CGI::FormBuilder->new(
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fields => [qw{do sid page subject body}],
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charset => 'utf-8',
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method => 'POST',
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required => [qw{body}],
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javascript => 0,
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params => $cgi,
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action => $config{cgiurl},
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header => 0,
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table => 0,
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template => scalar IkiWiki::template_params('comments_form.tmpl'),
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# wtf does this do in editpage?
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wikiname => $config{wikiname},
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);
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IkiWiki::decode_form_utf8($form);
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IkiWiki::run_hooks(formbuilder_setup => sub {
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shift->(title => "comment", form => $form, cgi => $cgi,
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session => $session, buttons => \@buttons);
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});
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IkiWiki::decode_form_utf8($form);
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$form->field(name => 'do', type => 'hidden');
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$form->field(name => 'sid', type => 'hidden', value => $session->id,
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force => 1);
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$form->field(name => 'page', type => 'hidden');
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$form->field(name => 'subject', type => 'text', size => 72);
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$form->field(name => 'body', type => 'textarea', rows => 5,
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cols => 80);
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# The untaint is OK (as in editpage) because we're about to pass
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# it to file_pruned anyway
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my $page = $form->field('page');
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$page = IkiWiki::possibly_foolish_untaint($page);
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if (!defined $page || !length $page ||
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IkiWiki::file_pruned($page, $config{srcdir})) {
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error(gettext("bad page name"));
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}
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my $allow_directives = $pagestate{$page}{comments}{allowdirectives};
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my $allow_html = $pagestate{$page}{comments}{allowdirectives};
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my $commit_comments = defined $pagestate{$page}{comments}{commit}
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? $pagestate{$page}{comments}{commit}
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: 1;
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# FIXME: is this right? Or should we be using the candidate subpage
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# (whatever that might mean) as the base URL?
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my $baseurl = urlto($page, undef, 1);
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$form->title(sprintf(gettext("commenting on %s"),
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IkiWiki::pagetitle($page)));
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$form->tmpl_param('helponformattinglink',
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htmllink($page, $page, 'ikiwiki/formatting',
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noimageinline => 1,
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linktext => 'FormattingHelp'),
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allowhtml => $allow_html,
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allowdirectives => $allow_directives);
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if (not exists $pagesources{$page}) {
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error(sprintf(gettext(
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"page '%s' doesn't exist, so you can't comment"),
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$page));
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}
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if (not $pagestate{$page}{comments}{comments}) {
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error(sprintf(gettext(
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"comments are not enabled on page '%s'"),
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$page));
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}
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if ($form->submitted eq CANCEL) {
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# bounce back to the page they wanted to comment on, and exit.
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# CANCEL need not be considered in future
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IkiWiki::redirect($cgi, urlto($page, undef, 1));
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exit;
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}
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IkiWiki::check_canedit($page . "[postcomment]", $cgi, $session);
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my ($authorurl, $author) = linkuser(getcgiuser($session));
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my $body = $form->field('body') || '';
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$body =~ s/\r\n/\n/g;
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$body =~ s/\r/\n/g;
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$body .= "\n" if $body !~ /\n$/;
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unless ($allow_directives) {
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# don't allow new-style directives at all
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$body =~ s/(^|[^\\])\[\[!/$1\\[[!/g;
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# don't allow [[ unless it begins an old-style
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# wikilink, if prefix_directives is off
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$body =~ s/(^|[^\\])\[\[(?![^\n\s\]+]\]\])/$1\\[[!/g
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unless $config{prefix_directives};
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}
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unless ($allow_html) {
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$body =~ s/&(\w|#)/&$1/g;
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$body =~ s/</</g;
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$body =~ s/>/>/g;
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}
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IkiWiki::run_hooks(sanitize => sub {
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# $fake is a possible location for this comment. We don't
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# know yet what the comment number *actually* is.
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my $fake = "$page/_comment_1";
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$body=shift->(
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page => $fake,
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destpage => $fake,
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content => $body,
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);
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});
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# In this template, the [[!meta]] directives should stay at the end,
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# so that they will override anything the user specifies. (For
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# instance, [[!meta author="I can fake the author"]]...)
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my $content_tmpl = template('comments_comment.tmpl');
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$content_tmpl->param(author => $author);
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$content_tmpl->param(authorurl => $authorurl);
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$content_tmpl->param(subject => $form->field('subject'));
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$content_tmpl->param(body => $body);
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my $content = $content_tmpl->output;
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# This is essentially a simplified version of editpage:
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# - the user does not control the page that's created, only the parent
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# - it's always a create operation, never an edit
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# - this means that conflicts should never happen
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# - this means that if they do, rocks fall and everyone dies
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if ($form->submitted eq PREVIEW) {
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# $fake is a possible location for this comment. We don't
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# know yet what the comment number *actually* is.
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my $fake = "$page/_comment_1";
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my $preview = IkiWiki::htmlize($fake, $page, 'mdwn',
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IkiWiki::linkify($page, $page,
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IkiWiki::preprocess($page, $page,
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IkiWiki::filter($fake, $page,
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$content),
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0, 1)));
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IkiWiki::run_hooks(format => sub {
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$preview = shift->(page => $page,
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content => $preview);
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});
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my $template = template("comments_display.tmpl");
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$template->param(content => $preview);
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$template->param(title => $form->field('subject'));
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$template->param(ctime => displaytime(time));
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$template->param(author => $author);
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$template->param(authorurl => $authorurl);
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$form->tmpl_param(page_preview => $template->output);
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}
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else {
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$form->tmpl_param(page_preview => "");
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}
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if ($form->submitted eq POST_COMMENT && $form->validate) {
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# Let's get posting. We don't check_canedit here because
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# that somewhat defeats the point of this plugin.
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checksessionexpiry($session, $cgi->param('sid'));
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# FIXME: check that the wiki is locked right now, because
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# if it's not, there are mad race conditions!
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# FIXME: rather a simplistic way to make the comments...
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my $i = 0;
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my $file;
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do {
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$i++;
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$file = "$page/_comment_${i}._comment";
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} while (-e "$config{srcdir}/$file");
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# FIXME: could probably do some sort of graceful retry
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# if I could be bothered
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writefile($file, $config{srcdir}, $content);
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my $conflict;
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if ($config{rcs} and $commit_comments) {
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my $message = gettext("Added a comment");
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if (defined $form->field('subject') &&
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length $form->field('subject')) {
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$message .= ": ".$form->field('subject');
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}
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IkiWiki::rcs_add($file);
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IkiWiki::disable_commit_hook();
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$conflict = IkiWiki::rcs_commit_staged($message,
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$session->param('name'), $ENV{REMOTE_ADDR});
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IkiWiki::enable_commit_hook();
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IkiWiki::rcs_update();
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}
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# Now we need a refresh
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require IkiWiki::Render;
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IkiWiki::refresh();
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IkiWiki::saveindex();
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# this should never happen, unless a committer deliberately
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# breaks it or something
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error($conflict) if defined $conflict;
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# Bounce back to where we were, but defeat broken caches
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my $anticache = "?updated=$page/_comment_$i";
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IkiWiki::redirect($cgi, urlto($page, undef, 1).$anticache);
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}
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else {
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IkiWiki::showform ($form, \@buttons, $session, $cgi,
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forcebaseurl => $baseurl);
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}
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exit;
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} #}}}
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package IkiWiki::PageSpec;
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sub match_postcomment ($$;@) {
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my $page = shift;
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my $glob = shift;
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unless ($page =~ s/\[postcomment\]$//) {
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return IkiWiki::FailReason->new("not posting a comment");
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}
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return match_glob($page, $glob);
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}
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1
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