diff options
Diffstat (limited to 'IkiWiki/Plugin/comments.pm')
| -rw-r--r-- | IkiWiki/Plugin/comments.pm | 840 |
1 files changed, 840 insertions, 0 deletions
diff --git a/IkiWiki/Plugin/comments.pm b/IkiWiki/Plugin/comments.pm new file mode 100644 index 000000000..98f9f8b3d --- /dev/null +++ b/IkiWiki/Plugin/comments.pm @@ -0,0 +1,840 @@ +#!/usr/bin/perl +# Copyright © 2006-2008 Joey Hess <joey@ikiwiki.info> +# Copyright © 2008 Simon McVittie <http://smcv.pseudorandom.co.uk/> +# Licensed under the GNU GPL, version 2, or any later version published by the +# Free Software Foundation +package IkiWiki::Plugin::comments; + +use warnings; +use strict; +use IkiWiki 3.00; +use Encode; +use POSIX qw(strftime); + +use constant PREVIEW => "Preview"; +use constant POST_COMMENT => "Post comment"; +use constant CANCEL => "Cancel"; + +my $postcomment; +my %commentstate; + +sub import { + hook(type => "checkconfig", id => 'comments', call => \&checkconfig); + hook(type => "getsetup", id => 'comments', call => \&getsetup); + hook(type => "preprocess", id => '_comment', call => \&preprocess); + hook(type => "sessioncgi", id => 'comment', call => \&sessioncgi); + hook(type => "htmlize", id => "_comment", call => \&htmlize); + hook(type => "pagetemplate", id => "comments", call => \&pagetemplate); + hook(type => "formbuilder_setup", id => "comments", call => \&formbuilder_setup); + # Load goto to fix up user page links for logged-in commenters + IkiWiki::loadplugin("goto"); + IkiWiki::loadplugin("inline"); +} + +sub getsetup () { + return + plugin => { + safe => 1, + rebuild => 1, + }, + comments_pagespec => { + type => 'pagespec', + example => 'blog/* and !*/Discussion', + description => 'PageSpec of pages where comments are allowed', + link => 'ikiwiki/PageSpec', + safe => 1, + rebuild => 1, + }, + comments_closed_pagespec => { + type => 'pagespec', + example => 'blog/controversial or blog/flamewar', + description => 'PageSpec of pages where posting new comments is not allowed', + link => 'ikiwiki/PageSpec', + safe => 1, + rebuild => 1, + }, + comments_pagename => { + type => 'string', + default => 'comment_', + description => 'Base name for comments, e.g. "comment_" for pages like "sandbox/comment_12"', + safe => 0, # manual page moving required + rebuild => undef, + }, + comments_allowdirectives => { + type => 'boolean', + example => 0, + description => 'Interpret directives in comments?', + safe => 1, + rebuild => 0, + }, + comments_allowauthor => { + type => 'boolean', + example => 0, + description => 'Allow anonymous commenters to set an author name?', + safe => 1, + rebuild => 0, + }, + comments_commit => { + type => 'boolean', + example => 1, + description => 'commit comments to the VCS', + # old uncommitted comments are likely to cause + # confusion if this is changed + safe => 0, + rebuild => 0, + }, +} + +sub checkconfig () { + $config{comments_commit} = 1 + unless defined $config{comments_commit}; + $config{comments_pagespec} = '' + unless defined $config{comments_pagespec}; + $config{comments_closed_pagespec} = '' + unless defined $config{comments_closed_pagespec}; + $config{comments_pagename} = 'comment_' + unless defined $config{comments_pagename}; +} + +sub htmlize { + my %params = @_; + return $params{content}; +} + +# FIXME: copied verbatim from meta +sub safeurl ($) { + my $url=shift; + if (exists $IkiWiki::Plugin::htmlscrubber::{safe_url_regexp} && + defined $IkiWiki::Plugin::htmlscrubber::safe_url_regexp) { + return $url=~/$IkiWiki::Plugin::htmlscrubber::safe_url_regexp/; + } + else { + return 1; + } +} + +sub preprocess { + my %params = @_; + my $page = $params{page}; + + my $format = $params{format}; + if (defined $format && ! exists $IkiWiki::hooks{htmlize}{$format}) { + error(sprintf(gettext("unsupported page format %s"), $format)); + } + + my $content = $params{content}; + if (! defined $content) { + error(gettext("comment must have content")); + } + $content =~ s/\\"/"/g; + + $content = IkiWiki::filter($page, $params{destpage}, $content); + + if ($config{comments_allowdirectives}) { + $content = IkiWiki::preprocess($page, $params{destpage}, + $content); + } + + # no need to bother with htmlize if it's just HTML + $content = IkiWiki::htmlize($page, $params{destpage}, $format, $content) + if defined $format; + + IkiWiki::run_hooks(sanitize => sub { + $content = shift->( + page => $page, + destpage => $params{destpage}, + content => $content, + ); + }); + + # set metadata, possibly overriding [[!meta]] directives from the + # comment itself + + my $commentuser; + my $commentip; + my $commentauthor; + my $commentauthorurl; + my $commentopenid; + if (defined $params{username}) { + $commentuser = $params{username}; + + my $oiduser = eval { IkiWiki::openiduser($commentuser) }; + + if (defined $oiduser) { + # looks like an OpenID + $commentauthorurl = $commentuser; + $commentauthor = $oiduser; + $commentopenid = $commentuser; + } + else { + $commentauthorurl = IkiWiki::cgiurl( + do => 'goto', + page => (length $config{userdir} + ? "$config{userdir}/$commentuser" + : "$commentuser")); + + $commentauthor = $commentuser; + } + } + else { + if (defined $params{ip}) { + $commentip = $params{ip}; + } + $commentauthor = gettext("Anonymous"); + } + + $commentstate{$page}{commentuser} = $commentuser; + $commentstate{$page}{commentopenid} = $commentopenid; + $commentstate{$page}{commentip} = $commentip; + $commentstate{$page}{commentauthor} = $commentauthor; + $commentstate{$page}{commentauthorurl} = $commentauthorurl; + if (! defined $pagestate{$page}{meta}{author}) { + $pagestate{$page}{meta}{author} = $commentauthor; + } + if (! defined $pagestate{$page}{meta}{authorurl}) { + $pagestate{$page}{meta}{authorurl} = $commentauthorurl; + } + + if ($config{comments_allowauthor}) { + if (defined $params{claimedauthor}) { + $pagestate{$page}{meta}{author} = $params{claimedauthor}; + } + + if (defined $params{url}) { + my $url=$params{url}; + + eval q{use URI::Heuristic}; + if (! $@) { + $url=URI::Heuristic::uf_uristr($url); + } + + if (safeurl($url)) { + $pagestate{$page}{meta}{authorurl} = $url; + } + } + } + else { + $pagestate{$page}{meta}{author} = $commentauthor; + $pagestate{$page}{meta}{authorurl} = $commentauthorurl; + } + + if (defined $params{subject}) { + $pagestate{$page}{meta}{title} = $params{subject}; + } + + if ($params{page} =~ m/\/(\Q$config{comments_pagename}\E\d+)$/) { + $pagestate{$page}{meta}{permalink} = urlto(IkiWiki::dirname($params{page}), undef, 1). + "#".page_to_id($params{page}); + } + + eval q{use Date::Parse}; + if (! $@) { + my $time = str2time($params{date}); + $IkiWiki::pagectime{$page} = $time if defined $time; + } + + return $content; +} + +sub sessioncgi ($$) { + my $cgi=shift; + my $session=shift; + + my $do = $cgi->param('do'); + if ($do eq 'comment') { + editcomment($cgi, $session); + } + elsif ($do eq 'commentmoderation') { + commentmoderation($cgi, $session); + } +} + +# Mostly cargo-culted from IkiWiki::plugin::editpage +sub editcomment ($$) { + my $cgi=shift; + my $session=shift; + + IkiWiki::decode_cgi_utf8($cgi); + + eval q{use CGI::FormBuilder}; + error($@) if $@; + + my @buttons = (POST_COMMENT, PREVIEW, CANCEL); + my $form = CGI::FormBuilder->new( + fields => [qw{do sid page subject editcontent type author url}], + charset => 'utf-8', + method => 'POST', + required => [qw{editcontent}], + javascript => 0, + params => $cgi, + action => $config{cgiurl}, + header => 0, + table => 0, + template => scalar IkiWiki::template_params('editcomment.tmpl'), + ); + + IkiWiki::decode_form_utf8($form); + IkiWiki::run_hooks(formbuilder_setup => sub { + shift->(title => "comment", form => $form, cgi => $cgi, + session => $session, buttons => \@buttons); + }); + IkiWiki::decode_form_utf8($form); + + my $type = $form->param('type'); + if (defined $type && length $type && $IkiWiki::hooks{htmlize}{$type}) { + $type = IkiWiki::possibly_foolish_untaint($type); + } + else { + $type = $config{default_pageext}; + } + my @page_types; + if (exists $IkiWiki::hooks{htmlize}) { + @page_types = grep { ! /^_/ } keys %{$IkiWiki::hooks{htmlize}}; + } + + $form->field(name => 'do', type => 'hidden'); + $form->field(name => 'sid', type => 'hidden', value => $session->id, + force => 1); + $form->field(name => 'page', type => 'hidden'); + $form->field(name => 'subject', type => 'text', size => 72); + $form->field(name => 'editcontent', type => 'textarea', rows => 10); + $form->field(name => "type", value => $type, force => 1, + type => 'select', options => \@page_types); + + $form->tmpl_param(username => $session->param('name')); + + if ($config{comments_allowauthor} and + ! defined $session->param('name')) { + $form->tmpl_param(allowauthor => 1); + $form->field(name => 'author', type => 'text', size => '40'); + $form->field(name => 'url', type => 'text', size => '40'); + } + else { + $form->tmpl_param(allowauthor => 0); + $form->field(name => 'author', type => 'hidden', value => '', + force => 1); + $form->field(name => 'url', type => 'hidden', value => '', + force => 1); + } + + # The untaint is OK (as in editpage) because we're about to pass + # it to file_pruned anyway + my $page = $form->field('page'); + $page = IkiWiki::possibly_foolish_untaint($page); + if (! defined $page || ! length $page || + IkiWiki::file_pruned($page, $config{srcdir})) { + error(gettext("bad page name")); + } + + my $baseurl = urlto($page, undef, 1); + + $form->title(sprintf(gettext("commenting on %s"), + IkiWiki::pagetitle($page))); + + $form->tmpl_param('helponformattinglink', + htmllink($page, $page, 'ikiwiki/formatting', + noimageinline => 1, + linktext => 'FormattingHelp'), + allowdirectives => $config{allow_directives}); + + if ($form->submitted eq CANCEL) { + # bounce back to the page they wanted to comment on, and exit. + # CANCEL need not be considered in future + IkiWiki::redirect($cgi, urlto($page, undef, 1)); + exit; + } + + if (not exists $pagesources{$page}) { + error(sprintf(gettext( + "page '%s' doesn't exist, so you can't comment"), + $page)); + } + + if (pagespec_match($page, $config{comments_closed_pagespec}, + location => $page)) { + error(sprintf(gettext( + "comments on page '%s' are closed"), + $page)); + } + + # Set a flag to indicate that we're posting a comment, + # so that postcomment() can tell it should match. + $postcomment=1; + IkiWiki::check_canedit($page, $cgi, $session); + $postcomment=0; + + my $location=unique_comment_location($page, $config{srcdir}); + + my $content = "[[!_comment format=$type\n"; + + # FIXME: handling of double quotes probably wrong? + if (defined $session->param('name')) { + my $username = $session->param('name'); + $username =~ s/"/"/g; + $content .= " username=\"$username\"\n"; + } + elsif (defined $ENV{REMOTE_ADDR}) { + my $ip = $ENV{REMOTE_ADDR}; + if ($ip =~ m/^([.0-9]+)$/) { + $content .= " ip=\"$1\"\n"; + } + } + + if ($config{comments_allowauthor}) { + my $author = $form->field('author'); + if (defined $author && length $author) { + $author =~ s/"/"/g; + $content .= " claimedauthor=\"$author\"\n"; + } + my $url = $form->field('url'); + if (defined $url && length $url) { + $url =~ s/"/"/g; + $content .= " url=\"$url\"\n"; + } + } + + my $subject = $form->field('subject'); + if (defined $subject && length $subject) { + $subject =~ s/"/"/g; + $content .= " subject=\"$subject\"\n"; + } + + $content .= " date=\"" . decode_utf8(strftime('%Y-%m-%dT%H:%M:%SZ', gmtime)) . "\"\n"; + + my $editcontent = $form->field('editcontent') || ''; + $editcontent =~ s/\r\n/\n/g; + $editcontent =~ s/\r/\n/g; + $editcontent =~ s/"/\\"/g; + $content .= " content=\"\"\"\n$editcontent\n\"\"\"]]\n"; + + # This is essentially a simplified version of editpage: + # - the user does not control the page that's created, only the parent + # - it's always a create operation, never an edit + # - this means that conflicts should never happen + # - this means that if they do, rocks fall and everyone dies + + if ($form->submitted eq PREVIEW) { + my $preview=previewcomment($content, $location, $page, time); + IkiWiki::run_hooks(format => sub { + $preview = shift->(page => $page, + content => $preview); + }); + $form->tmpl_param(page_preview => $preview); + } + else { + $form->tmpl_param(page_preview => ""); + } + + if ($form->submitted eq POST_COMMENT && $form->validate) { + IkiWiki::checksessionexpiry($cgi, $session); + + $postcomment=1; + my $ok=IkiWiki::check_content(content => $form->field('editcontent'), + subject => $form->field('subject'), + $config{comments_allowauthor} ? ( + author => $form->field('author'), + url => $form->field('url'), + ) : (), + page => $location, + cgi => $cgi, + session => $session, + nonfatal => 1, + ); + $postcomment=0; + + if (! $ok) { + my $penddir=$config{wikistatedir}."/comments_pending"; + $location=unique_comment_location($page, $penddir); + writefile("$location._comment", $penddir, $content); + IkiWiki::printheader($session); + print IkiWiki::misctemplate(gettext(gettext("comment stored for moderation")), + "<p>". + gettext("Your comment will be posted after moderator review"). + "</p>"); + exit; + } + + # FIXME: could probably do some sort of graceful retry + # on error? Would require significant unwinding though + my $file = "$location._comment"; + writefile($file, $config{srcdir}, $content); + + my $conflict; + + if ($config{rcs} and $config{comments_commit}) { + my $message = gettext("Added a comment"); + if (defined $form->field('subject') && + length $form->field('subject')) { + $message = sprintf( + gettext("Added a comment: %s"), + $form->field('subject')); + } + + IkiWiki::rcs_add($file); + IkiWiki::disable_commit_hook(); + $conflict = IkiWiki::rcs_commit_staged($message, + $session->param('name'), $ENV{REMOTE_ADDR}); + IkiWiki::enable_commit_hook(); + IkiWiki::rcs_update(); + } + + # Now we need a refresh + require IkiWiki::Render; + IkiWiki::refresh(); + IkiWiki::saveindex(); + + # this should never happen, unless a committer deliberately + # breaks it or something + error($conflict) if defined $conflict; + + # Jump to the new comment on the page. + # The trailing question mark tries to avoid broken + # caches and get the most recent version of the page. + IkiWiki::redirect($cgi, urlto($page, undef, 1). + "?updated#".page_to_id($location)); + + } + else { + IkiWiki::showform ($form, \@buttons, $session, $cgi, + forcebaseurl => $baseurl); + } + + exit; +} + +sub commentmoderation ($$) { + my $cgi=shift; + my $session=shift; + + IkiWiki::needsignin($cgi, $session); + if (! IkiWiki::is_admin($session->param("name"))) { + error(gettext("you are not logged in as an admin")); + } + + IkiWiki::decode_cgi_utf8($cgi); + + if (defined $cgi->param('sid')) { + IkiWiki::checksessionexpiry($cgi, $session); + + my $rejectalldefer=$cgi->param('rejectalldefer'); + + my %vars=$cgi->Vars; + my $added=0; + foreach my $id (keys %vars) { + if ($id =~ /(.*)\Q._comment\E$/) { + my $action=$cgi->param($id); + next if $action eq 'Defer' && ! $rejectalldefer; + + # Make sure that the id is of a legal + # pending comment before untainting. + my ($f)= $id =~ /$config{wiki_file_regexp}/; + if (! defined $f || ! length $f || + IkiWiki::file_pruned($f, $config{srcdir})) { + error("illegal file"); + } + + my $page=IkiWiki::possibly_foolish_untaint(IkiWiki::dirname($1)); + my $file="$config{wikistatedir}/comments_pending/". + IkiWiki::possibly_foolish_untaint($id); + + if ($action eq 'Accept') { + my $content=eval { readfile($file) }; + next if $@; # file vanished since form was displayed + my $dest=unique_comment_location($page, $config{srcdir})."._comment"; + writefile($dest, $config{srcdir}, $content); + if ($config{rcs} and $config{comments_commit}) { + IkiWiki::rcs_add($dest); + } + $added++; + } + + # This removes empty subdirs, so the + # .ikiwiki/comments_pending dir will + # go away when all are moderated. + require IkiWiki::Render; + IkiWiki::prune($file); + } + } + + if ($added) { + my $conflict; + if ($config{rcs} and $config{comments_commit}) { + my $message = gettext("Comment moderation"); + IkiWiki::disable_commit_hook(); + $conflict=IkiWiki::rcs_commit_staged($message, + $session->param('name'), $ENV{REMOTE_ADDR}); + IkiWiki::enable_commit_hook(); + IkiWiki::rcs_update(); + } + + # Now we need a refresh + require IkiWiki::Render; + IkiWiki::refresh(); + IkiWiki::saveindex(); + + error($conflict) if defined $conflict; + } + } + + my @comments=map { + my ($id, $ctime)=@{$_}; + my $file="$config{wikistatedir}/comments_pending/$id"; + my $content=readfile($file); + my $preview=previewcomment($content, $id, + IkiWiki::dirname($_), $ctime); + { + id => $id, + view => $preview, + } + } sort { $b->[1] <=> $a->[1] } comments_pending(); + + my $template=template("commentmoderation.tmpl"); + $template->param( + sid => $session->id, + comments => \@comments, + ); + IkiWiki::printheader($session); + my $out=$template->output; + IkiWiki::run_hooks(format => sub { + $out = shift->(page => "", content => $out); + }); + print IkiWiki::misctemplate(gettext("comment moderation"), $out); + exit; +} + +sub formbuilder_setup (@) { + my %params=@_; + + my $form=$params{form}; + if ($form->title eq "preferences" && + IkiWiki::is_admin($params{session}->param("name"))) { + push @{$params{buttons}}, "Comment Moderation"; + if ($form->submitted && $form->submitted eq "Comment Moderation") { + commentmoderation($params{cgi}, $params{session}); + } + } +} + +sub comments_pending () { + my $dir="$config{wikistatedir}/comments_pending/"; + return unless -d $dir; + + my @ret; + eval q{use File::Find}; + error($@) if $@; + find({ + no_chdir => 1, + wanted => sub { + $_=decode_utf8($_); + if (IkiWiki::file_pruned($_, $dir)) { + $File::Find::prune=1; + } + elsif (! -l $_ && ! -d _) { + $File::Find::prune=0; + my ($f)=/$config{wiki_file_regexp}/; # untaint + if (defined $f && $f =~ /\Q._comment\E$/) { + my $ctime=(stat($f))[10]; + $f=~s/^\Q$dir\E\/?//; + push @ret, [$f, $ctime]; + } + } + } + }, $dir); + + return @ret; +} + +sub previewcomment ($$$) { + my $content=shift; + my $location=shift; + my $page=shift; + my $time=shift; + + my $preview = IkiWiki::htmlize($location, $page, '_comment', + IkiWiki::linkify($location, $page, + IkiWiki::preprocess($location, $page, + IkiWiki::filter($location, $page, $content), 0, 1))); + + my $template = template("comment.tmpl"); + $template->param(content => $preview); + $template->param(ctime => displaytime($time)); + + IkiWiki::run_hooks(pagetemplate => sub { + shift->(page => $location, + destpage => $page, + template => $template); + }); + + $template->param(have_actions => 0); + + return $template->output; +} + +sub commentsshown ($) { + my $page=shift; + + return ! pagespec_match($page, "internal(*/$config{comments_pagename}*)", + location => $page) && + pagespec_match($page, $config{comments_pagespec}, + location => $page); +} + +sub commentsopen ($) { + my $page = shift; + + return length $config{cgiurl} > 0 && + (! length $config{comments_closed_pagespec} || + ! pagespec_match($page, $config{comments_closed_pagespec}, + location => $page)); +} + +sub pagetemplate (@) { + my %params = @_; + + my $page = $params{page}; + my $template = $params{template}; + my $shown = ($template->query(name => 'commentslink') || + $template->query(name => 'commentsurl') || + $template->query(name => 'atomcommentsurl') || + $template->query(name => 'comments')) && + commentsshown($page); + + if ($template->query(name => 'comments')) { + my $comments = undef; + if ($shown) { + $comments = IkiWiki::preprocess_inline( + pages => "internal($page/$config{comments_pagename}*)", + template => 'comment', + show => 0, + reverse => 'yes', + page => $page, + destpage => $params{destpage}, + feedfile => 'comments', + emptyfeeds => 'no', + ); + } + + if (defined $comments && length $comments) { + $template->param(comments => $comments); + } + + if ($shown && commentsopen($page)) { + my $addcommenturl = IkiWiki::cgiurl(do => 'comment', + page => $page); + $template->param(addcommenturl => $addcommenturl); + } + } + + if ($template->query(name => 'commentsurl')) { + if ($shown) { + $template->param(commentsurl => + urlto($page, undef, 1).'#comments'); + } + } + + if ($template->query(name => 'atomcommentsurl') && $config{usedirs}) { + if ($shown) { + # This will 404 until there are some comments, but I + # think that's probably OK... + $template->param(atomcommentsurl => + urlto($page, undef, 1).'comments.atom'); + } + } + + if ($template->query(name => 'commentslink')) { + # XXX Would be nice to say how many comments there are in + # the link. But, to update the number, blog pages + # would have to update whenever comments of any inlines + # page are added, which is not currently done. + if ($shown) { + $template->param(commentslink => + htmllink($page, $params{destpage}, $page, + linktext => gettext("Comments"), + anchor => "comments", + noimageinline => 1)); + } + } + + # everything below this point is only relevant to the comments + # themselves + if (!exists $commentstate{$page}) { + return; + } + + if ($template->query(name => 'commentid')) { + $template->param(commentid => page_to_id($page)); + } + + if ($template->query(name => 'commentuser')) { + $template->param(commentuser => + $commentstate{$page}{commentuser}); + } + + if ($template->query(name => 'commentopenid')) { + $template->param(commentopenid => + $commentstate{$page}{commentopenid}); + } + + if ($template->query(name => 'commentip')) { + $template->param(commentip => + $commentstate{$page}{commentip}); + } + + if ($template->query(name => 'commentauthor')) { + $template->param(commentauthor => + $commentstate{$page}{commentauthor}); + } + + if ($template->query(name => 'commentauthorurl')) { + $template->param(commentauthorurl => + $commentstate{$page}{commentauthorurl}); + } + + if ($template->query(name => 'removeurl') && + IkiWiki::Plugin::remove->can("check_canremove") && + length $config{cgiurl}) { + $template->param(removeurl => IkiWiki::cgiurl(do => 'remove', + page => $page)); + $template->param(have_actions => 1); + } +} + +sub unique_comment_location ($) { + my $page=shift; + my $dir=shift; + + my $location; + my $i = 0; + do { + $i++; + $location = "$page/$config{comments_pagename}$i"; + } while (-e "$dir/$location._comment"); + + return $location; +} + +sub page_to_id ($) { + # Converts a comment page name into a unique, legal html id + # addtibute value, that can be used as an anchor to link to the + # comment. + my $page=shift; + + eval q{use Digest::MD5 'md5_hex'}; + error($@) if $@; + + return "comment-".md5_hex($page); +} + +package IkiWiki::PageSpec; + +sub match_postcomment ($$;@) { + my $page = shift; + my $glob = shift; + + if (! $postcomment) { + return IkiWiki::FailReason->new("not posting a comment"); + } + return match_glob($page, $glob); +} + +1 |