#!/usr/bin/perl
use warnings;
use strict;
use lib '.'; # For use in nonstandard directory, munged by Makefile.
use IkiWiki;
use IkiWiki::Plugin::comments;

sub usage () {
	die gettext("usage: ikiwiki-comment pagefile"), "\n";
}

my $pagefile=shift || usage ();

my $dir=IkiWiki::dirname($pagefile);
$dir="." unless length $dir;
my $page=IkiWiki::basename($pagefile);
if (! -d $pagefile) {
	$page=~s/\.[^.]+$//;
}

IkiWiki::Plugin::comments::checkconfig();
my $comment_num=1 + IkiWiki::Plugin::comments::num_comments($page, $dir);

my $username = getpwuid($<);
if (! defined $username) { $username="" }

my $comment="[[!comment format=mdwn\n";
$comment.=" username=\"$username\"\n";
$comment.=" subject=\"\"\"comment $comment_num\"\"\"\n";
$comment.=" " . IkiWiki::Plugin::comments::commentdate() . "\n";
$comment.=" content=\"\"\"\n\n\"\"\"]]\n";

# This will yield a hash of the comment before it's edited,
# but that's ok; the date provides sufficient entropy to avoid collisions,
# and the hash of a comment does not need to match its actual content.
# Doing it this way avoids needing to move the file to a final
# location after it's edited.
my $location=IkiWiki::Plugin::comments::unique_comment_location($page, $comment, $dir)."._comment";

IkiWiki::writefile($location, $dir, $comment);

my @editor="vi";
if (-x "/usr/bin/editor") {
	@editor="/usr/bin/editor";
}
if (exists $ENV{EDITOR}) {
	@editor=split(' ', $ENV{EDITOR});
}
if (exists $ENV{VISUAL}) {
@editor=split(' ', $ENV{VISUAL});
}
exec(@editor, "$dir/$location");