lib/MojoFacets/Gnuplot.pm

   1 package MojoFacets::Gnuplot;
   2
   3 use warnings;
   4 use strict;
   5
   6 use base 'Mojolicious::Controller';
   7
   8 use Data::Dump qw(dump);
   9 use Digest::MD5 qw(md5_hex);
  10 use Text::Unaccent::PurePerl;
  11 use MojoFacets::Data;
  12
  13 sub index {
  14         my $self = shift;
  15
  16         my $columns = $self->session('columns') || return $self->redirect_to('/data/columns');
  17         my $path    = $self->session('path')    || return $self->redirect_to('/data/load');
  18         my $with    = $self->param('with') || 'points';
  19
  20         my $gnuplot_hide = $self->every_param('gnuplot_hide');
  21         warn "## gnuplot_hide=",dump( $gnuplot_hide );
  22         my $hide_columns;
  23         $hide_columns->{$_}++ foreach @$gnuplot_hide;
  24         warn "## hide_columns ", dump $hide_columns;
  25
  26 #       my $name = join('.', 'items', map { my $n = unac_string($_); $n =~ s/\W+/_/g; $n } @$columns );
  27         my $name = MojoFacets::Data::__export_path_name( $path, 'items', @$columns );
  28
  29         warn "# name $name\n";
  30
  31         my $url = "/export/$path/$name";
  32         my $dir = $self->app->home->rel_file('public');
  33
  34         if ( -e "$dir/$url" ) {
  35
  36                 my $timefmt = $self->param('timefmt');
  37
  38                 my $timefmt_x = $timefmt;
  39                 $timefmt_x =~ s/[ T]%H/\\n%H/;
  40
  41                 my $spaces = $timefmt;
  42                 $spaces =~ s/\S//g;
  43                 $spaces = length( $spaces );
  44
  45                 my @plot;
  46                 foreach ( 1 .. $#$columns ) {
  47                         my $title = $columns->[$_];
  48                         next if $hide_columns->{$title};
  49                         $title =~ s/_/ /g;
  50                         next if $hide_columns->{ $title };
  51
  52                         my $n = $_ + 1 + $spaces;
  53                         push @plot, qq|"$dir/$url" using 1:$n notitle with $with lc $_|,
  54                                                 qq|NaN lc $_ title "$title" with lines|
  55                         ;
  56                 }
  57
  58                 my $g = qq|
  59
  60 set terminal png size 1000,400
  61 set output '$dir/$url.png'
  62
  63                 |;
  64
  65                 if ( $timefmt ) {
  66                         $g .= qq|
  67
  68 set xdata time
  69 set timefmt "$timefmt"
  70 #set format x "$timefmt"
  71 set format x "$timefmt_x"
  72
  73                         |;
  74                 }
  75
  76 #set xrange [ "2009-01-01":"2010-01-01" ]
  77 #set yrange [ 0 : ]
  78
  79                 $g .= "\n\nplot " . join(',', @plot) . "\n";
  80                 $g =~ s/\n\n+/\n/sg;
  81
  82 #warn "gnuplot $g";
  83
  84                 open(my $gnuplot, '|-', 'gnuplot') || die "gnuplot $!";
  85                 print $gnuplot $g;
  86                 close $gnuplot;
  87
  88                 if ( -e "$dir/$url.png" ) {
  89                         warn "redirect $url.png";
  90                         return $self->redirect_to( "$url.png" );
  91                 } else {
  92                         $self->render_text( "no $dir/$url.png" );
  93                 }
  94         } else {
  95                 $self->render_text("no graph for $url");
  96         }
  97 }
  98
  99 1;