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#!/usr/bin/perl
use v5.14;
use strict;
use warnings;
use JSON;
use Clone 'clone';
use IO::Handle;
# Send the header so that i3bar knows we want to use JSON:
printf "%s", '{"version":1}';
# Begin the endless array.
printf "%s", '[';
# We send an empty first array of blocks to make the loop simpler:
printf "%s",'[],';
open my $conky, "-|:encoding(utf8)", "conky -c $ENV{HOME}/.i3/conkyrc-perl";
STDOUT->autoflush();
my @data;
my %in_progress;
my $json = JSON->new;
$json->ascii([1]);
my %simple_mappings = (
"SHORTTEXT" => "shorttext",
);
my %commands = (
battery => \&get_bat_stats,
);
LINE: while (<$conky>) {
chomp($_);
next if m/^\s*$/;
if (m/^END_BLOCK$/) {
STDOUT->printf("%s,\n", $json->encode(\@data));
undef @data;
next;
}
if (m/^COLOR: (#[a-zA-Z0-9]+)$/) {
$in_progress{color} = $1;
next;
}
for my $key (keys %simple_mappings) {
if (m/^$key: (.*)$/) {
$in_progress{$simple_mappings{$key}} = $1;
next LINE;
}
}
if (m/^FULLTEXT: (.*)$/) {
my $fulltext = $1;
$in_progress{full_text} = $fulltext;
push @data, clone \%in_progress;
undef %in_progress;
next;
}
if (m/^COMMAND: ([^\s]*)(?: (.*)?)$/) {
my $command = $1;
my @args = split / /, $2;
die "Unknown command requested: $command" unless defined $commands{$command};
my $command_ret = $commands{$command}->(@args);
for my $text (@$command_ret) {
$in_progress{full_text} = $text;
push @data, clone \%in_progress;
}
undef %in_progress;
next;
}
printf STDERR "Got unexpected data: %s\n", $_;
}
sub get_bat_stats {
my $bats = [@_] // ["BAT0"];
my $ret = [];
for my $bat (@$bats) {
next unless -e "/sys/class/power_supply/$bat";
open my $fh, "<", "/sys/class/power_supply/$bat/uevent";
my %values;
while (my $line = <$fh>) {
my ($key, $value) = split /=/, $line;
$key =~ s/^POWER_SUPPLY_//;
chomp $value;
$values{$key} = $value;
}
close $fh;
my $time_remaining_hours = 0;
$time_remaining_hours = $values{ENERGY_NOW} / $values{POWER_NOW} unless $values{POWER_NOW} == 0;
push @$ret, sprintf("%s %s%%, %.2fW, %.2fh", $bat, $values{CAPACITY}, $values{POWER_NOW} / 1e6, $time_remaining_hours);
}
return $ret;
}
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