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#!/usr/bin/perl
package IkiWiki::Plugin::poll;
use warnings;
use strict;
use IkiWiki;
sub import { #{{{
hook(type => "preprocess", id => "poll", call => \&preprocess);
hook(type => "cgi", id => "poll", call => \&cgi);
} # }}}
sub yesno ($) { #{{{
my $val=shift;
return (defined $val && lc($val) eq "yes");
} #}}}
my %pagenum;
sub preprocess (@) { #{{{
my %params=(open => "yes", total => "yes", percent => "yes", @_);
my $open=yesno($params{open});
my $showtotal=yesno($params{total});
my $showpercent=yesno($params{percent});
$pagenum{$params{page}}++;
my %choices;
my @choices;
my $total=0;
while (@_) {
my $key=shift;
my $value=shift;
next unless $key =~ /^\d+/;
my $num=$key;
$key=shift;
$value=shift;
$choices{$key}=$num;
push @choices, $key;
$total+=$num;
}
my $ret="";
foreach my $choice (@choices) {
if ($open && exists $config{cgiurl}) {
$ret.="<form action=\"$config{cgiurl}\">\n";
}
my $percent=$total > 0 ? int($choices{$choice} / $total * 100) : 0;
$ret.="<p>\n";
if ($showpercent) {
$ret.="$choice ($percent%)\n";
}
else {
$ret.="$choice ($choices{$choice})\n";
}
if ($open && exists $config{cgiurl}) {
$ret.="<input type=\"hidden\" name=\"do\" value=\"poll\" />\n";
$ret.="<input type=\"hidden\" name=\"num\" value=\"$pagenum{$params{page}}\" />\n";
$ret.="<input type=\"hidden\" name=\"page\" value=\"$params{page}\" />\n";
$ret.="<input type=\"hidden\" name=\"choice\" value=\"$choice\" />\n";
$ret.="<input type=\"submit\" value=\"vote\" />\n";
}
$ret.="</p>\n<hr class=poll align=left width=\"$percent%\"/>\n";
if ($open && exists $config{cgiurl}) {
$ret.="</form>\n";
}
}
if ($showtotal) {
$ret.="<span>Total votes: $total</span>\n";
}
return "<div class=poll>$ret</div>";
} # }}}
sub cgi ($) { #{{{
my $cgi=shift;
if (defined $cgi->param('do') && $cgi->param('do') eq "poll") {
my $choice=$cgi->param('choice');
if (! defined $choice) {
error("no choice specified");
}
my $num=$cgi->param('num');
if (! defined $num) {
error("no num specified");
}
my $page=IkiWiki::possibly_foolish_untaint($cgi->param('page'));
if (! defined $page || ! exists $pagesources{$page}) {
error("bad page name");
}
# Did they vote before? If so, let them change their vote,
# and check for dups.
my $session=IkiWiki::cgi_getsession();
my $choice_param="poll_choice_${page}_$num";
my $oldchoice=$session->param($choice_param);
if (defined $oldchoice && $oldchoice eq $choice) {
# Same vote; no-op.
IkiWiki::redirect($cgi, "$config{url}/".htmlpage($page));
exit;
}
my $content=readfile(srcfile($pagesources{$page}));
# Now parse the content, find the right poll,
# and find the choice within it, and increment its number.
# If they voted before, decrement that one.
my $edit=sub {
my $escape=shift;
my $params=shift;
return "\\[[poll $params]]" if $escape;
if (--$num == 0) {
$params=~s/(^|\s+)(\d+)\s+"?\Q$choice\E"?(\s+|$)/$1.($2+1)." \"$choice\"".$3/se;
if (defined $oldchoice) {
$params=~s/(^|\s+)(\d+)\s+"?\Q$oldchoice\E"?(\s+|$)/$1.($2-1 >=0 ? $2-1 : 0)." \"$oldchoice\"".$3/se;
}
}
return "[[poll $params]]";
};
$content =~ s{(\\?)\[\[poll\s+([^]]+)\s*\]\]}{$edit->($1, $2)}seg;
# Store their vote, update the page, and redirect to it.
writefile($pagesources{$page}, $config{srcdir}, $content);
$session->param($choice_param, $choice);
IkiWiki::cgi_savesession($session);
$oldchoice=$session->param($choice_param);
if ($config{rcs}) {
# prevent deadlock with post-commit hook
IkiWiki::unlockwiki();
IkiWiki::rcs_commit($pagesources{$page}, "poll vote",
IkiWiki::rcs_prepedit($pagesources{$page}),
$session->param("name"), $ENV{REMOTE_ADDR});
}
else {
require IkiWiki::Render;
IkiWiki::refresh();
IkiWiki::saveindex();
}
# Need to set cookie in same http response that does the
# redir.
eval q{use CGI::Cookie};
error($@) if $@;
my $cookie = CGI::Cookie->new(-name=> $session->name, -value=> $session->id);
print $cgi->redirect(-cookie => $cookie,
-url => "$config{url}/".htmlpage($page));
exit;
}
} #}}}
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