+ 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) {
+ $comments = IkiWiki::preprocess_inline(
+ pages => "comment($page) and !comment($page/*)",
+ 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)) {
+ $template->param(addcommenturl => addcommenturl($page));
+ }
+ }
+
+ if ($shown) {
+ if ($template->query(name => 'commentsurl')) {
+ $template->param(commentsurl =>
+ urlto($page).'#comments');
+ }
+
+ 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).'comments.atom');
+ }
+
+ 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), $num),
+ anchor => "comments",
+ noimageinline => 1
+ );
+ }
+ elsif (commentsopen($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});
+ }
+
+ 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 => 'commentauthoravatar')) {
+ $template->param(commentauthoravatar =>
+ $commentstate{$page}{commentauthoravatar});
+ }
+
+ 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)));
+}
+