#!/usr/bin/env perl
#
# Author: Jue Ruan
#
use strict;

my $color = 35;

my %fg_color_map = (black=>30, red=>31, green=>32, yellow=>33, blue=>34, magenta=>35, cyan=>36);

my @pats = ();
foreach my $pat (@ARGV){
	if($pat=~/^(\S+)=(\S+?)$/){
		if(exists $fg_color_map{$2}){
			$color = $fg_color_map{$2};
			push(@pats, [$1, $color]);
		} else {
			print STDERR "[hlcolor] unknown color \"$2\"\n";
			push(@pats, [$1, $color]);
		}
	} else {
		push(@pats, [$pat, $color]);
	}
}

$| = 1;

while(<STDIN>){
	foreach my $pat (@pats){
		s/($pat->[0])/\e[1;$pat->[1]m\1\e[0m/g;
	}
	print;
}

1;

=pod
function highlight() {
	declare -A fg_color_map
	fg_color_map[black]=30
	fg_color_map[red]=31
	fg_color_map[green]=32
	fg_color_map[yellow]=33
	fg_color_map[blue]=34
	fg_color_map[magenta]=35
	fg_color_map[cyan]=36

	fg_c=$(echo -e "\e[1;${fg_color_map[$2]}m")
	c_rs=$'\e[0m'
	sed -u "s/$1/$fg_c\0$c_rs/g"
}

if [ -z $1 ]; then
	echo "Usage: $0 <sed_regex_pattern> <color:black,red,green,yellow,blue,magenta,cyan>"
	exit
fi

PAT=$1
COLOR=$2

if [ -z $COLOR ]; then
	COLOR=magenta
fi

highlight $PAT $COLOR
=cut