IkiWiki/Plugin/postsparkline.pm

   1 #!/usr/bin/perl
   2 package IkiWiki::Plugin::postsparkline;
   3
   4 use warnings;
   5 use strict;
   6 use IkiWiki 3.00;
   7
   8 sub import {
   9         IkiWiki::loadplugin('sparkline');
  10         hook(type => "getsetup", id => "postsparkline", call => \&getsetup);
  11         hook(type => "preprocess", id => "postsparkline", call => \&preprocess);
  12 }
  13
  14 sub getsetup () {
  15         return
  16                 plugin => {
  17                         safe => 1,
  18                         rebuild => undef,
  19                 },
  20 }
  21
  22 sub preprocess (@) {
  23         my %params=@_;
  24
  25         if (! exists $params{max}) {
  26                 $params{max}=100;
  27         }
  28
  29         if (! exists $params{pages}) {
  30                 return "";
  31         }
  32
  33         if (! exists $params{time} || $params{time} ne 'mtime') {
  34                 $params{timehash} = \%IkiWiki::pagectime;
  35         }
  36         else {
  37                 $params{timehash} = \%IkiWiki::pagemtime;
  38         }
  39
  40         if (! exists $params{formula}) {
  41                 error gettext("missing formula")
  42         }
  43         my $formula=$params{formula};
  44         $formula=~s/[^a-zA-Z0-9]*//g;
  45         $formula=IkiWiki::possibly_foolish_untaint($formula);
  46         if (! length $formula ||
  47             ! IkiWiki::Plugin::postsparkline::formula->can($formula)) {
  48                 error gettext("unknown formula");
  49         }
  50
  51         add_depends($params{page}, $params{pages});
  52
  53         my @list=sort { $params{timehash}->{$b} <=> $params{timehash}->{$a} }
  54                 pagespec_match_list(
  55                         [ grep { $_ ne $params{page} } keys %pagesources],
  56                         $params{pages}, location => $params{page});
  57
  58         my @data=eval qq{IkiWiki::Plugin::postsparkline::formula::$formula(\\\%params, \@list)};
  59         if ($@) {
  60                 error $@;
  61         }
  62
  63         if (! @data) {
  64                 # generate an empty graph
  65                 push @data, 0 foreach 1..($params{max} / 2);
  66         }
  67
  68         my $color=exists $params{color} ? "($params{color})" : "";
  69
  70         delete $params{pages};
  71         delete $params{formula};
  72         delete $params{ftime};
  73         delete $params{color};
  74         return IkiWiki::Plugin::sparkline::preprocess(%params,
  75                 map { $_.$color => "" } reverse @data);
  76 }
  77
  78 sub perfoo ($@) {
  79         my $sub=shift;
  80         my $params=shift;
  81
  82         my $max=$params->{max};
  83         my ($first, $prev, $cur);
  84         my $count=0;
  85         my @data;
  86         foreach (@_) {
  87                 $cur=$sub->($params->{timehash}->{$_});
  88                 if (defined $prev) {
  89                         if ($prev != $cur) {
  90                                 push @data, "$prev,$count";
  91                                 $count=0;
  92                                 last if --$max <= 0;
  93
  94                                 for ($cur+1 .. $prev-1) {
  95                                         push @data, "$_,0";
  96                                         last if --$max == 0;
  97                                 }
  98                         }
  99                 }
 100                 else {
 101                         $first=$cur;
 102                 }
 103                 $count++;
 104                 $prev=$cur;
 105         }
 106
 107         return @data;
 108 }
 109
 110 package IkiWiki::Plugin::postsparkline::formula;
 111
 112 sub peryear (@) {
 113         return IkiWiki::Plugin::postsparkline::perfoo(sub {
 114                 return (localtime $_[0])[5];
 115         }, @_);
 116 }
 117
 118 sub permonth (@) {
 119         return IkiWiki::Plugin::postsparkline::perfoo(sub {
 120                 my ($month, $year)=(localtime $_[0])[4,5];
 121                 return $year*12+$month;
 122         }, @_);
 123 }
 124
 125 sub perday (@) {
 126         return IkiWiki::Plugin::postsparkline::perfoo(sub {
 127                 my ($year, $yday)=(localtime $_[0])[5,7];
 128                 return $year*365+$yday;
 129         }, @_);
 130 }
 131
 132 sub interval ($@) {
 133         my $params=shift;
 134
 135         my $max=$params->{max};
 136         my @data;
 137         for (my $i=1; $i < @_; $i++) {
 138                 push @data, $params->{timehash}->{$_[$i-1]} - $params->{timehash}->{$_[$i]};
 139                 last if --$max <= 0;
 140         }
 141         return @data;
 142 }
 143
 144 1