X-Git-Url: http://git.vanrenterghem.biz/git.ikiwiki.info.git/blobdiff_plain/ffec6806087981420eaf83c8d83cc4523a46d0de..5afd6e0f701d98f1dbb512c11853589c96c9dd0b:/IkiWiki/Plugin/comments.pm?ds=inline

diff --git a/IkiWiki/Plugin/comments.pm b/IkiWiki/Plugin/comments.pm
index 1c10417c3..851f4862e 100644
--- a/IkiWiki/Plugin/comments.pm
+++ b/IkiWiki/Plugin/comments.pm
@@ -21,11 +21,19 @@ 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 => "preprocess", id => 'commentmoderation', call => \&preprocess_moderation);
+	# here for backwards compatability with old comments
 	hook(type => "preprocess", id => '_comment', call => \&preprocess);
 	hook(type => "sessioncgi", id => 'comment', call => \&sessioncgi);
 	hook(type => "htmlize", id => "_comment", call => \&htmlize);
+	hook(type => "htmlize", id => "_comment_pending",
+		call => \&htmlize_pending);
 	hook(type => "pagetemplate", id => "comments", call => \&pagetemplate);
-	hook(type => "cgi", id => "comments", call => \&linkcgi);
+	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");
 }
 
@@ -34,6 +42,7 @@ sub getsetup () {
 		plugin => {
 			safe => 1,
 			rebuild => 1,
+			section => "web",
 		},
 		comments_pagespec => {
 			type => 'pagespec',
@@ -99,6 +108,14 @@ sub htmlize {
 	return $params{content};
 }
 
+sub htmlize_pending {
+	my %params = @_;
+	return sprintf(gettext("this comment needs %s"),
+		'<a href="'.
+		IkiWiki::cgiurl(do => "commentmoderation").'">'.
+		gettext("moderation").'</a>');
+}
+
 # FIXME: copied verbatim from meta
 sub safeurl ($) {
 	my $url=shift;
@@ -126,16 +143,14 @@ sub preprocess {
 	}
 	$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;
+	$content = IkiWiki::htmlize($page, $params{destpage}, $format, $content)
+		if defined $format;
 
 	IkiWiki::run_hooks(sanitize => sub {
 		$content = shift->(
@@ -161,15 +176,14 @@ sub preprocess {
 		if (defined $oiduser) {
 			# looks like an OpenID
 			$commentauthorurl = $commentuser;
-			$commentauthor = $oiduser;
+			$commentauthor = (defined $params{nickname} && length $params{nickname}) ? $params{nickname} : $oiduser;
 			$commentopenid = $commentuser;
 		}
 		else {
 			$commentauthorurl = IkiWiki::cgiurl(
-				do => 'commenter',
-				page => (length $config{userdir}
-					? "$config{userdir}/$commentuser"
-					: "$commentuser"));
+				do => 'goto',
+				page => IkiWiki::userpage($commentuser)
+			);
 
 			$commentauthor = $commentuser;
 		}
@@ -217,12 +231,14 @@ sub preprocess {
 	}
 
 	if (defined $params{subject}) {
-		$pagestate{$page}{meta}{title} = $params{subject};
+		# decode title the same way meta does
+		eval q{use HTML::Entities};
+		$pagestate{$page}{meta}{title} = decode_entities($params{subject});
 	}
 
-	if ($params{page} =~ m/\/(\Q$config{comments_pagename}\E\d+)$/) {
+	if ($params{page} =~ m/\/\Q$config{comments_pagename}\E\d+_/) {
 		$pagestate{$page}{meta}{permalink} = urlto(IkiWiki::dirname($params{page}), undef, 1).
-			"#".$params{page};
+			"#".page_to_id($params{page});
 	}
 
 	eval q{use Date::Parse};
@@ -234,43 +250,44 @@ sub preprocess {
 	return $content;
 }
 
-# This is exactly the same as recentchanges_link :-(
-sub linkcgi ($) {
-	my $cgi=shift;
-	if (defined $cgi->param('do') && $cgi->param('do') eq "commenter") {
+sub preprocess_moderation {
+	my %params = @_;
 
-		my $page=decode_utf8($cgi->param("page"));
-		if (! defined $page) {
-			error("missing page parameter");
-		}
+	$params{desc}=gettext("Comment Moderation")
+		unless defined $params{desc};
 
-		IkiWiki::loadindex();
+	if (length $config{cgiurl}) {
+		return '<a href="'.
+			IkiWiki::cgiurl(do => 'commentmoderation').
+			'">'.$params{desc}.'</a>';
+	}
+	else {
+		return $params{desc};
+	}
+}
 
-		my $link=bestlink("", $page);
-		if (! length $link) {
-			print "Content-type: text/html\n\n";
-			print IkiWiki::misctemplate(gettext(gettext("missing page")),
-				"<p>".
-				sprintf(gettext("The page %s does not exist."),
-					htmllink("", "", $page)).
-				"</p>");
-		}
-		else {
-			IkiWiki::redirect($cgi, urlto($link, undef, 1));
-		}
+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, $session);
+	}
+	elsif ($do eq 'commentsignin') {
+		IkiWiki::cgi_signin($cgi, $session);
 		exit;
 	}
 }
 
 # Mostly cargo-culted from IkiWiki::plugin::editpage
-sub sessioncgi ($$) {
+sub editcomment ($$) {
 	my $cgi=shift;
 	my $session=shift;
 
-	my $do = $cgi->param('do');
-	return unless $do eq 'comment';
-
 	IkiWiki::decode_cgi_utf8($cgi);
 
 	eval q{use CGI::FormBuilder};
@@ -287,7 +304,7 @@ sub sessioncgi ($$) {
 		action => $config{cgiurl},
 		header => 0,
 		table => 0,
-		template => scalar IkiWiki::template_params('editcomment.tmpl'),
+		template => { template('editcomment.tmpl') },
 	);
 
 	IkiWiki::decode_form_utf8($form);
@@ -304,10 +321,15 @@ sub sessioncgi ($$) {
 	else {
 		$type = $config{default_pageext};
 	}
+
+
 	my @page_types;
 	if (exists $IkiWiki::hooks{htmlize}) {
-		@page_types = grep { ! /^_/ } keys %{$IkiWiki::hooks{htmlize}};
+		foreach my $key (grep { !/^_/ } keys %{$IkiWiki::hooks{htmlize}}) {
+			push @page_types, [$key, $IkiWiki::hooks{htmlize}{$key}{longname} || $key];
+		}
 	}
+	@page_types=sort @page_types;
 
 	$form->field(name => 'do', type => 'hidden');
 	$form->field(name => 'sid', type => 'hidden', value => $session->id,
@@ -334,17 +356,22 @@ sub sessioncgi ($$) {
 			force => 1);
 	}
 
+	if (! defined $session->param('name')) {
+		# Make signinurl work and return here.
+		$form->tmpl_param(signinurl => IkiWiki::cgiurl(do => 'commentsignin'));
+		$session->param(postsignin => $ENV{QUERY_STRING});
+		IkiWiki::cgi_savesession($session);
+	}
+
 	# 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, $config{srcdir})) {
+		IkiWiki::file_pruned($page)) {
 		error(gettext("bad page name"));
 	}
 
-	# FIXME: is this right? Or should we be using the candidate subpage
-	# (whatever that might mean) as the base URL?
 	my $baseurl = urlto($page, undef, 1);
 
 	$form->title(sprintf(gettext("commenting on %s"),
@@ -382,25 +409,20 @@ sub sessioncgi ($$) {
 	IkiWiki::check_canedit($page, $cgi, $session);
 	$postcomment=0;
 
-	# FIXME: rather a simplistic way to make the comments...
-	my $i = 0;
-	my $file;
-	my $location;
-	do {
-		$i++;
-		$location = "$page/$config{comments_pagename}$i";
-	} while (-e "$config{srcdir}/$location._comment");
-
-	my $content = "[[!_comment format=$type\n";
+	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/"/&quot;/g;
 		$content .= " username=\"$username\"\n";
 	}
-	elsif (defined $ENV{REMOTE_ADDR}) {
-		my $ip = $ENV{REMOTE_ADDR};
+	if (defined $session->param('nickname')) {
+		my $nickname = $session->param('nickname');
+		$nickname =~ s/"/&quot;/g;
+		$content .= " nickname=\"$nickname\"\n";
+	}
+	elsif (defined $session->remote_addr()) {
+		my $ip = $session->remote_addr();
 		if ($ip =~ m/^([.0-9]+)$/) {
 			$content .= " ip=\"$1\"\n";
 		}
@@ -408,31 +430,37 @@ sub sessioncgi ($$) {
 
 	if ($config{comments_allowauthor}) {
 		my $author = $form->field('author');
-		if (length $author) {
+		if (defined $author && length $author) {
 			$author =~ s/"/&quot;/g;
 			$content .= " claimedauthor=\"$author\"\n";
 		}
 		my $url = $form->field('url');
-		if (length $url) {
+		if (defined $url && length $url) {
 			$url =~ s/"/&quot;/g;
 			$content .= " url=\"$url\"\n";
 		}
 	}
 
 	my $subject = $form->field('subject');
-	if (length $subject) {
+	if (defined $subject && length $subject) {
 		$subject =~ s/"/&quot;/g;
-		$content .= " subject=\"$subject\"\n";
 	}
+	else {
+		$subject = "comment ".(num_comments($page, $config{srcdir}) + 1);
+	}
+	$content .= " subject=\"$subject\"\n";
 
 	$content .= " date=\"" . decode_utf8(strftime('%Y-%m-%dT%H:%M:%SZ', gmtime)) . "\"\n";
 
-	my $editcontent = $form->field('editcontent') || '';
+	my $editcontent = $form->field('editcontent');
+	$editcontent="" if ! defined $editcontent;
 	$editcontent =~ s/\r\n/\n/g;
 	$editcontent =~ s/\r/\n/g;
 	$editcontent =~ s/"/\\"/g;
 	$content .= " content=\"\"\"\n$editcontent\n\"\"\"]]\n";
 
+	my $location=unique_comment_location($page, $content, $config{srcdir});
+
 	# 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
@@ -440,41 +468,55 @@ sub sessioncgi ($$) {
 	# - this means that if they do, rocks fall and everyone dies
 
 	if ($form->submitted eq PREVIEW) {
-		my $preview = IkiWiki::htmlize($location, $page, '_comment',
-				IkiWiki::linkify($location, $page,
-					IkiWiki::preprocess($location, $page,
-						IkiWiki::filter($location,
-							$page, $content),
-						0, 1)));
+		my $preview=previewcomment($content, $location, $page, time);
 		IkiWiki::run_hooks(format => sub {
-				$preview = shift->(page => $page,
-					content => $preview);
-			});
-
-		my $template = template("comment.tmpl");
-		$template->param(content => $preview);
-		$template->param(title => $form->field('subject'));
-		$template->param(ctime => displaytime(time));
-
-		IkiWiki::run_hooks(pagetemplate => sub {
-			shift->(page => $location,
-				destpage => $page,
-				template => $template);
+			$preview = shift->(page => $page,
+				content => $preview);
 		});
-
-		$form->tmpl_param(page_preview => $template->output);
+		$form->tmpl_param(page_preview => $preview);
 	}
 	else {
 		$form->tmpl_param(page_preview => "");
 	}
 
 	if ($form->submitted eq POST_COMMENT && $form->validate) {
-		my $file = "$location._comment";
-
 		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) {
+			$location=unique_comment_location($page, $content, $config{srcdir}, "._comment_pending");
+			writefile("$location._comment_pending", $config{srcdir}, $content);
+
+			# Refresh so anything that deals with pending
+			# comments can be updated.
+			require IkiWiki::Render;
+			IkiWiki::refresh();
+			IkiWiki::saveindex();
+
+			IkiWiki::printheader($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;
@@ -490,8 +532,10 @@ sub sessioncgi ($$) {
 
 			IkiWiki::rcs_add($file);
 			IkiWiki::disable_commit_hook();
-			$conflict = IkiWiki::rcs_commit_staged($message,
-				$session->param('name'), $ENV{REMOTE_ADDR});
+			$conflict = IkiWiki::rcs_commit_staged(
+				message => $message,
+				session => $session,
+			);
 			IkiWiki::enable_commit_hook();
 			IkiWiki::rcs_update();
 		}
@@ -508,21 +552,206 @@ sub sessioncgi ($$) {
 		# 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)."#$location?updated");
+		IkiWiki::redirect($cgi, urlto($page, undef, 1).
+			"?updated#".page_to_id($location));
 
 	}
 	else {
 		IkiWiki::showform ($form, \@buttons, $session, $cgi,
-			forcebaseurl => $baseurl);
+			forcebaseurl => $baseurl, page => $page);
 	}
 
 	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 =~ /(.*)\._comment(?:_pending)?$/) {
+				$id=decode_utf8($id);
+				my $action=$cgi->param($id);
+				next if $action eq 'Defer' && ! $rejectalldefer;
+
+				# Make sure that the id is of a legal
+				# pending comment.
+				my ($f) = $id =~ /$config{wiki_file_regexp}/;
+				if (! defined $f || ! length $f ||
+				    IkiWiki::file_pruned($f)) {
+					error("illegal file");
+				}
+
+				my $page=IkiWiki::dirname($f);
+				my $file="$config{srcdir}/$f";
+				if (! -e $file) {
+					# old location
+					$file="$config{wikistatedir}/comments_pending/".$f;
+				}
+
+				if ($action eq 'Accept') {
+					my $content=eval { readfile($file) };
+					next if $@; # file vanished since form was displayed
+					my $dest=unique_comment_location($page, $content, $config{srcdir})."._comment";
+					writefile($dest, $config{srcdir}, $content);
+					if ($config{rcs} and $config{comments_commit}) {
+						IkiWiki::rcs_add($dest);
+					}
+					$added++;
+				}
+
+				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 => $message,
+					session => $session,
+				);
+				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, $dir, $ctime)=@{$_};
+		my $content=readfile("$dir/$id");
+		my $preview=previewcomment($content, $id,
+			$id, $ctime);
+		{
+			id => $id,
+			view => $preview,
+		}
+	} sort { $b->[2] <=> $a->[2] } 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 @ret;
+
+	eval q{use File::Find};
+	error($@) if $@;
+	eval q{use Cwd};
+	error($@) if $@;
+	my $origdir=getcwd();
+
+	my $find_comments=sub {
+		my $dir=shift;
+		my $extension=shift;
+		return unless -d $dir;
+
+		chdir($dir) || die "chdir $dir: $!";
+
+		find({
+			no_chdir => 1,
+			wanted => sub {
+				my $file=decode_utf8($_);
+				$file=~s/^\.\///;
+				return if ! length $file || IkiWiki::file_pruned($file)
+					|| -l $_ || -d _ || $file !~ /\Q$extension\E$/;
+				my ($f) = $file =~ /$config{wiki_file_regexp}/; # untaint
+				if (defined $f) {
+					my $ctime=(stat($_))[10];
+					push @ret, [$f, $dir, $ctime];
+				}
+			}
+		}, ".");
+
+		chdir($origdir) || die "chdir $origdir: $!";
+	};
+	
+	$find_comments->($config{srcdir}, "._comment_pending");
+	# old location
+	$find_comments->("$config{wikistatedir}/comments_pending/",
+		"._comment");
+
+	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, undef, 1));
+	$template->param(html5 => $config{html5});
+
+	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($page, "*/$config{comments_pagename}*",
+	return ! pagespec_match($page, "comment(*)",
 	                        location => $page) &&
 	       pagespec_match($page, $config{comments_pagespec},
 	                      location => $page);
@@ -552,7 +781,7 @@ sub pagetemplate (@) {
 		my $comments = undef;
 		if ($shown) {
 			$comments = IkiWiki::preprocess_inline(
-				pages => "internal($page/$config{comments_pagename}*)",
+				pages => "comment($page)",
 				template => 'comment',
 				show => 0,
 				reverse => 'yes',
@@ -568,42 +797,56 @@ sub pagetemplate (@) {
 		}
 
 		if ($shown && commentsopen($page)) {
-			my $addcommenturl = IkiWiki::cgiurl(do => 'comment',
-				page => $page);
-			$template->param(addcommenturl => $addcommenturl);
+			$template->param(addcommenturl => addcommenturl($page));
 		}
 	}
 
-	if ($template->query(name => 'commentsurl')) {
-		if ($shown) {
+	if ($shown) {
+		if ($template->query(name => 'commentsurl')) {
 			$template->param(commentsurl =>
 				urlto($page, undef, 1).'#comments');
 		}
-	}
 
-	if ($template->query(name => 'atomcommentsurl') && $config{usedirs}) {
-		if ($shown) {
+		if ($template->query(name => 'atomcommentsurl') && $config{usedirs}) {
 			# 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}, $page,
-					linktext => gettext("Comments"),
+		if ($template->query(name => 'commentslink')) {
+			my $num=num_comments($page, $config{srcdir});
+			my $link;
+			if ($num > 0) {
+				$link = htmllink($page, $params{destpage}, $page,
+					linktext => sprintf(ngettext("%i comment", "%i comments", $num), $num),
 					anchor => "comments",
-					noimageinline => 1));
+					noimageinline => 1
+				);
+			}
+			elsif (commentsopen($page)) {
+				$link = "<a href=\"".addcommenturl($page)."\">".
+					#translators: Here "Comment" is a verb;
+					#translators: the user clicks on it to
+					#translators: post a comment.
+					gettext("Comment").
+					"</a>";
+			}
+			$template->param(commentslink => $link)
+				if defined $link;
 		}
 	}
 
+	# 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});
@@ -628,8 +871,60 @@ sub pagetemplate (@) {
 		$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 addcommenturl ($) {
+	my $page=shift;
+
+	return IkiWiki::cgiurl(do => 'comment', page => $page);
+}
+
+sub num_comments ($$) {
+	my $page=shift;
+	my $dir=shift;
+
+	my @comments=glob("$dir/$page/$config{comments_pagename}*._comment");
+	return int @comments;
+}
+
+sub unique_comment_location ($$$$) {
+	my $page=shift;
+	eval q{use Digest::MD5 'md5_hex'};
+	error($@) if $@;
+	my $content_md5=md5_hex(Encode::encode_utf8(shift));
+	my $dir=shift;
+	my $ext=shift || "._comment";
+
+	my $location;
+	my $i = num_comments($page, $dir);
+	do {
+		$i++;
+		$location = "$page/$config{comments_pagename}${i}_${content_md5}";
+	} while (-e "$dir/$location$ext");
+
+	return $location;
+}
+
+sub page_to_id ($) {
+	# Converts a comment page name into a unique, legal html id
+	# attribute 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 $@;
+
+	return "comment-".md5_hex(Encode::encode_utf8(($page)));
+}
+	
 package IkiWiki::PageSpec;
 
 sub match_postcomment ($$;@) {
@@ -639,7 +934,39 @@ sub match_postcomment ($$;@) {
 	if (! $postcomment) {
 		return IkiWiki::FailReason->new("not posting a comment");
 	}
-	return match_glob($page, $glob);
+	return match_glob($page, $glob, @_);
+}
+
+sub match_comment ($$;@) {
+	my $page = shift;
+	my $glob = shift;
+
+	# To see if it's a comment, check the source file type.
+	# Deal with comments that were just deleted.
+	my $source=exists $IkiWiki::pagesources{$page} ?
+		$IkiWiki::pagesources{$page} :
+		$IkiWiki::delpagesources{$page};
+	my $type=defined $source ? IkiWiki::pagetype($source) : undef;
+	if (! defined $type || $type ne "_comment") {
+		return IkiWiki::FailReason->new("$page is not a comment");
+	}
+
+	return match_glob($page, "$glob/*", internal => 1, @_);
+}
+
+sub match_comment_pending ($$;@) {
+	my $page = shift;
+	my $glob = shift;
+	
+	my $source=exists $IkiWiki::pagesources{$page} ?
+		$IkiWiki::pagesources{$page} :
+		$IkiWiki::delpagesources{$page};
+	my $type=defined $source ? IkiWiki::pagetype($source) : undef;
+	if (! defined $type || $type ne "_comment_pending") {
+		return IkiWiki::FailReason->new("$page is not a pending comment");
+	}
+
+	return match_glob($page, "$glob/*", internal => 1, @_);
 }
 
 1