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=head1 NAME |
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App::Basis::ConvertText2::Plugin::Sparkline |
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=head1 SYNOPSIS |
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my $content = "1,2,3,4,5,6,7,8" ; |
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my $params = {} ; |
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my $obj = App::Basis::ConvertText2::Plugin::Sparkline->new() ; |
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my $out = $obj->process( 'sparkline', $content, $params) ; |
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=head1 DESCRIPTION |
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Convert a text string of comma separated numbers into a sparkline image PNG |
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=cut |
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# ---------------------------------------------------------------------------- |
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package App::Basis::ConvertText2::Plugin::Sparkline; |
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$App::Basis::ConvertText2::Plugin::Sparkline::VERSION = '0.4'; |
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use 5.10.0; |
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use strict; |
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use warnings; |
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use GD::Sparkline; |
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use Path::Tiny; |
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use Capture::Tiny qw(capture); |
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use Moo; |
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use App::Basis::ConvertText2::Support; |
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use namespace::clean; |
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has handles => ( |
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is => 'ro', |
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init_arg => undef, |
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default => sub {[qw{sparkline}]} |
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); |
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# ----------------------------------------------------------------------------- |
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my %_colour_schemes = ( |
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orange => { b => 'transparent', a => 'ffcc66', l => 'ff6000' }, |
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blue => { b => 'transparent', a => 'ccffff', l => '3399cc' }, |
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red => { b => 'transparent', a => 'ccaaaa', l => '990000' }, |
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green => { b => 'transparent', a => '99ff99', l => '006600' }, |
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mono => { b => 'ffffff', a => 'ffffff', l => '000000' } |
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); |
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# ----------------------------------------------------------------------------- |
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=item color_schemes |
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return a list of the color schemes available |
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=cut |
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sub color_schemes { |
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my $self = shift; |
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my @schemes = sort keys %_colour_schemes; |
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return @schemes; |
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} |
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# ----------------------------------------------------------------------------- |
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=item process (sparkline) |
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create a simple sparkline image, with some nice defaults |
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parameters |
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text - comma separated list of integers for the sparkline |
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filename - filename to save the created sparkline image as |
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hashref params of |
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bgcolor - background color in hex (123456) or transparent - optional |
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line - color or the line, in hex (abcdef) - optional |
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color - area under the line, in hex (abcdef) - optional |
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scheme - color scheme, only things in red blue green orange mono are valid - optional |
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size - size of image, default 80x20, widthxheight - optional |
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=cut |
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sub process { |
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my $self = shift; |
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my ( $tag, $content, $params, $cachedir ) = @_; |
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my $scheme = $params->{scheme}; |
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my ( $b, $a, $l ) = ( $params->{bgcolor}, $params->{color}, $params->{line} ); |
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$params->{size} ||= "80x20"; |
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$params->{size} =~ /^\s*(\d+)\s*x\s*(\d+)\s*$/; |
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my ( $w, $h ) = ( $1, $2 ); |
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if ( !$h ) { |
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$w = 80; |
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$h = 20; |
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} |
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die "Missing content" if ( !$content ); |
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die "Does not appear to be comma separated integers" if ( $content !~ /^[,\d ]+$/ ); |
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# we can use the cache or process everything ourselves |
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my $sig = create_sig( $content, $params ); |
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my $filename = cachefile( $cachedir, "$sig.png" ); |
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if ( !-f $filename ) { |
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$content =~ s/^\n*//gsm; # remove any leading new lines |
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if ( $content !~ /\n$/sm ) { # make sure we have a trailing new line |
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$content .= "\n"; |
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} |
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if ($scheme) { |
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$scheme = lc $scheme; |
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if ( !$_colour_schemes{$scheme} ) { |
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warn "Unknown color scheme $params->{scheme}"; |
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$scheme = ( sort keys %_colour_schemes )[0]; |
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} |
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$b = $_colour_schemes{ $params->{scheme} }{b}; # background color |
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$a = $_colour_schemes{ $params->{scheme} }{a}; # area under line color |
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$l = $_colour_schemes{ $params->{scheme} }{l}; # top line color |
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} |
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else { |
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$b ||= 'transparent'; |
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$a = 'cccccc'; |
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$l = '333333'; |
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} |
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my $args = { b => $b, a => $a, l => $l, s => $content, w => $w, h => $h }; |
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my $spark = GD::Sparkline->new($args); |
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if ($spark) { |
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my $png = $spark->draw(); |
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if ($png) { |
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path($filename)->spew_raw($png) ; |
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} |
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} |
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} |
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my $out; |
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if (-f $filename) { |
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# create something suitable for the HTML |
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$out = create_img_src( $filename, $params->{title} ); |
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} |
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return $out; |
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} |
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# ---------------------------------------------------------------------------- |
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1; |
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__END__ |