poll.pm

   1 #!/usr/bin/perl
   2 package IkiWiki::Plugin::poll;
   3
   4 use warnings;
   5 use strict;
   6 use IkiWiki 3.00;
   7 use Encode;
   8
   9 sub import {
  10         hook(type => "getsetup", id => "poll", call => \&getsetup);
  11         hook(type => "preprocess", id => "poll", call => \&preprocess);
  12         hook(type => "sessioncgi", id => "poll", call => \&sessioncgi);
  13 }
  14
  15 sub getsetup () {
  16         return
  17                 plugin => {
  18                         safe => 1,
  19                         rebuild => undef,
  20                         section => "widget",
  21                 },
  22 }
  23
  24 my %pagenum;
  25 sub preprocess (@) {
  26         my %params=(open => "yes", total => "yes", percent => "yes",
  27                 expandable => "no", @_);
  28
  29         my $open=IkiWiki::yesno($params{open});
  30         my $showtotal=IkiWiki::yesno($params{total});
  31         my $showpercent=IkiWiki::yesno($params{percent});
  32         my $expandable=IkiWiki::yesno($params{expandable});
  33         my $num=++$pagenum{$params{page}}{$params{destpage}};
  34
  35         my %choices;
  36         my @choices;
  37         my $total=0;
  38         while (@_) {
  39                 my $key=shift;
  40                 my $value=shift;
  41
  42                 next unless $key =~ /^\d+/;
  43
  44                 my $num=$key;
  45                 $key=shift;
  46                 $value=shift;
  47
  48                 $choices{$key}=$num;
  49                 push @choices, $key;
  50                 $total+=$num;
  51         }
  52
  53         my $ret="";
  54         foreach my $choice (@choices) {
  55                 if ($open && exists $config{cgiurl}) {
  56                         # use POST to avoid robots
  57                         $ret.="<form method=\"POST\" action=\"".IkiWiki::cgiurl()."\">\n";
  58                 }
  59                 my $percent=$total > 0 ? int($choices{$choice} / $total * 100) : 0;
  60                 $ret.="<p>\n";
  61                 if ($showpercent) {
  62                         $ret.="$choice ($percent%)\n";
  63                 }
  64                 else {
  65                         $ret.="$choice ($choices{$choice})\n";
  66                 }
  67                 if ($open && exists $config{cgiurl}) {
  68                         $ret.="<input type=\"hidden\" name=\"do\" value=\"poll\" />\n";
  69                         $ret.="<input type=\"hidden\" name=\"num\" value=\"$num\" />\n";
  70                         $ret.="<input type=\"hidden\" name=\"page\" value=\"$params{page}\" />\n";
  71                         $ret.="<input type=\"hidden\" name=\"choice\" value=\"$choice\" />\n";
  72                         $ret.="<input type=\"submit\" value=\"".gettext("vote")."\" />\n";
  73                 }
  74                 $ret.="</p>\n<hr class=poll align=left width=\"$percent%\"/>\n";
  75                 if ($open && exists $config{cgiurl}) {
  76                         $ret.="</form>\n";
  77                 }
  78         }
  79
  80         if ($expandable && $open && exists $config{cgiurl}) {
  81                 $ret.="<p>\n";
  82                 $ret.="<form method=\"POST\" action=\"".IkiWiki::cgiurl()."\">\n";
  83                 $ret.="<input type=\"hidden\" name=\"do\" value=\"poll\" />\n";
  84                 $ret.="<input type=\"hidden\" name=\"num\" value=\"$num\" />\n";
  85                 $ret.="<input type=\"hidden\" name=\"page\" value=\"$params{page}\" />\n";
  86                 $ret.=gettext("Write in").": <input name=\"choice\" size=50 />\n";
  87                 $ret.="<input type=\"submit\" value=\"".gettext("vote")."\" />\n";
  88                 $ret.="</form>\n";
  89                 $ret.="</p>\n";
  90         }
  91
  92         if ($showtotal) {
  93                 $ret.="<span>".gettext("Total votes:")." $total</span>\n";
  94         }
  95         return "<div class=poll>$ret</div>";
  96 }
  97
  98 sub sessioncgi ($$) {
  99         my $cgi=shift;
 100         my $session=shift;
 101         if (defined $cgi->param('do') && $cgi->param('do') eq "poll") {
 102                 my $choice=decode_utf8($cgi->param('choice'));
 103                 if (! defined $choice || not length $choice) {
 104                         error("no choice specified");
 105                 }
 106                 my $num=$cgi->param('num');
 107                 if (! defined $num) {
 108                         error("no num specified");
 109                 }
 110                 my $page=IkiWiki::possibly_foolish_untaint($cgi->param('page'));
 111                 if (! defined $page || ! exists $pagesources{$page}) {
 112                         error("bad page name");
 113                 }
 114
 115                 # Did they vote before? If so, let them change their vote,
 116                 # and check for dups.
 117                 my $choice_param="poll_choice_${page}_$num";
 118                 my $oldchoice=$session->param($choice_param);
 119                 if (defined $oldchoice && $oldchoice eq $choice) {
 120                         # Same vote; no-op.
 121                         IkiWiki::redirect($cgi, urlto($page));
 122                         exit;
 123                 }
 124
 125                 my $prefix=$config{prefix_directives} ? "!poll" : "poll";
 126
 127                 my $content=readfile(srcfile($pagesources{$page}));
 128                 # Now parse the content, find the right poll,
 129                 # and find the choice within it, and increment its number.
 130                 # If they voted before, decrement that one.
 131                 my $edit=sub {
 132                         my $escape=shift;
 133                         my $params=shift;
 134                         return "\\[[$prefix $params]]" if $escape;
 135                         if (--$num == 0) {
 136                                 if ($params=~s/(^|\s+)(\d+)\s+"?\Q$choice\E"?(\s+|$)/$1.($2+1)." \"$choice\"".$3/se) {
 137                                 }
 138                                 elsif ($params=~/expandable=(\w+)/
 139                                     & &IkiWiki::yesno($1)) {
 140                                         $choice=~s/["\]\n\r]//g;
 141                                         $params.=" 1 \"$choice\""
 142                                                 if length $choice;
 143                                 }
 144                                 if (defined $oldchoice) {
 145                                         $params=~s/(^|\s+)(\d+)\s+"?\Q$oldchoice\E"?(\s+|$)/$1.($2-1 >=0 ? $2-1 : 0)." \"$oldchoice\"".$3/se;
 146                                 }
 147                         }
 148                         return "[[$prefix $params]]";
 149                 };
 150                 $content =~ s{(\\?)\[\[\Q$prefix\E\s+([^]]+)\s*\]\]}{$edit->($1, $2)}seg;
 151
 152                 # Store their vote, update the page, and redirect to it.
 153                 writefile($pagesources{$page}, $config{srcdir}, $content);
 154                 $session->param($choice_param, $choice);
 155                 IkiWiki::cgi_savesession($session);
 156                 $oldchoice=$session->param($choice_param);
 157                 if ($config{rcs}) {
 158                         IkiWiki::disable_commit_hook();
 159                         IkiWiki::rcs_commit(
 160                                 file => $pagesources{$page},
 161                                 message => "poll vote ($choice)",
 162                                 token => IkiWiki::rcs_prepedit($pagesources{$page}),
 163                                 session => $session,
 164                         );
 165                         IkiWiki::enable_commit_hook();
 166                         IkiWiki::rcs_update();
 167                 }
 168                 require IkiWiki::Render;
 169                 IkiWiki::refresh();
 170                 IkiWiki::saveindex();
 171
 172                 # Need to set cookie in same http response that does the
 173                 # redir.
 174                 eval q{use CGI::Cookie};
 175                 error($@) if $@;
 176                 my $cookie = CGI::Cookie->new(-name=> $session->name, -value=> $session->id);
 177                 print $cgi->redirect(-cookie => $cookie,
 178                         -url => urlto($page));
 179                 exit;
 180         }
 181 }
 182
 183 1