#!/usr/bin/perl
#
# xeseds2.pl version 2.1
#
# Original program by unknown author 
# cleaned up and fixed for xephem 3.5 and konq by twalker@bigpond.net.au 
# It now forks a new konqueror window with each "goto"
# Treat as GPL unless 'unknown author' has complaints :)
#
# UPDATED: 20020425
# 
# added comet, asteroid, planet, and satellite links. We are now pulling out a lot more info :)
# Some of the links mightn't be the best resource and if you know of better ones and
# could be bothered to figure out their syntax then sent me back an edited copy.
# 
# We have caching support!. When you access a messier object or an NGC object from seds
# we are pulling the object down with wget and then loading up that html page in konqueror
# .. using this method you can pull pages down before you go out and access them again in the
# field.
#
# bloody hell, this script is really starting to need documentation!
#
# Okay you can revert to original behaviour by setting caching=0. This means you have to be 
# online to access anything. i
#
# When using caching, set your cache dir to wherever..  ~/.xeseds might work for you,
# it might not, I found it simpler just to give an absolute. 
# 
# wget is required for caching support.
#
# Beyond that I'm really interested in finding a 1/2 decesnt comet resource.
# thessd.jpl.nasa.gov supports comets but not in anyway I could figure out on the command line.
# Seems to only like POST requests. The planet resource is quite dull :) A new one there
# might be useful. Finally there may be some comet/asteriods name's I haven't come up with.
# I'm basically looking at whatever output the xephem fifo dishes up and then searching
# for an online resource that takes that kind of input... I found 3 ways of dishing up
# a comet so far, so if there are any other let me know.
#
# p.s. when you are using seds caching konq is going to take a while to come up as wget
# does it's run before loading konq on the local file. I could do them both in tandem but it'
# going to require downloading double the info, which doesn't make sense :)
#
# Tim Walker, twalker@bigpond.net.au

$| = 1;

$caching = 1;

$browser = "konqueror";
$cachedir = "/home/ecdowney/.xeseds";
$wget = "/usr/bin/wget";

# ---------------------------

$messierurl = "http://www.seds.org/messier/m/";
$ngcurl = "http://www.seds.org/~spider/ngc/ngc.cgi?";
#$ngcurl = "http://www.seds.org/messier/xtra/ngc/n";
$cometurl = "http://cfa-www.harvard.edu/iau/Ephemerides/Comets/";
$asteroidurl = "http://ssd.jpl.nasa.gov/cgi-bin/da?";
$planeturl = "http://maps.jpl.nasa.gov/";
$saturl = "https://www.TBS-satellite.com/cgi-bin/wwwwais?keywords=";

$args = @ARGV;
$port = 0;
$loc_fifo = 0;
$in_fifo = 0;

for ($i = 0; $i < $args; $i++) {
	$switch = $ARGV[$i];
	$i++;
	if ($switch eq "-m") {
		$in_fifo = $ARGV[$i];
	} elsif ($switch eq "-g") {
		$loc_fifo = $ARGV[$i];
	} elsif ($switch eq "-t") {
		$port = $ARGV[$i];
	}
}

mkdir ($cachedir) if ( ! -e $cachedir && $caching);
chdir ($cachedir) if ($caching);


open FIFO, "+<$loc_fifo" or die "$loc_fifo: $!\n";

while (true) {
	$data=0;
	$url=0;
	sysread (FIFO, $data, 1024);
	print "DATA: $data\n";


	if ($data =~ /,E, /) { 
		print "Got EarthSat!\n";
		($fullname, @therest) = split(/,/, $data);
		($keyword, @therest) = split(/\s+/, $fullname);
		print " -> URL: $saturl$keyword\n";
		$url = "$saturl$keyword";
	} elsif ($data =~ /,f/) {
		print "Got Seds!\n";
	    	($name, @stuff) = split /,\s*/, $data;
	       	if ($name =~ /M(\d+)/) {
		        $url = $messierurl . sprintf("m%03d.html", $1);
		}
		if ($name =~ /NGC (\d+)/) {
					$url = $ngcurl . "ngc$1";
		}
		if ($name =~ /IC (\d+)/) {
			$url = $ngcurl . "ic$1";
		}
		if ($caching) {
			#$command = "(cd $cachedir && $wget -c -E -k -K -p $url)";
			$command = "(cd $cachedir && $wget -p -E  -K -k -c $url)";
			print " -> $command\n";
			$filename = $url;
			$filename =~ s/~/\%7E/g;
			if ($filename !~ /.html$/) { $filename .= ".html"; }
			$filename = $cachedir."/".substr($filename, 7);
			# $filename =~ s/\?/\\?/g;
			print "Checking for $filename...\n";
			if ( -e $filename) {
				print " -> found it\n";
			} else {
				print " -> NOT Found\n";
			}
			system($command) if ( ! -e $filename );
			print " -> Loading file $filename\n";
			$url = $filename;
		}
		
	} elsif ($data =~ /,e,/ || $data =~ /,p,/) {
		print "Got Comet!\n";
		if ($data =~ /^C\// || $data =~ /^P\//) {
			($junkyear, $desig, @therest) = split(/\s+/, $data);
			($junk, $year) = split(/\//, $junkyear);
			print " -> URL: $cometurl$year$desig.html";
			$url = "$cometurl$year$desig.html";
		} elsif ($data =~ /P\//) {
			($comet, @therest) = split(/\//, $data);
			($cometnum, $junk) = split(/P/, $comet,2);
			if ($cometnum < 10) {
				$zeroes = "000";
			} elsif ($cometnum < 100) {
				$zeroes = "00";
			} elsif ($cometnum < 1000) {
				$zeroes = "0";
			}
			print " -> URL: $cometurl$zeroes$comet.html";
			$url = "$cometurl$zeroes$comet.html";
		} else { 
			print " -> Must be an asteroid\n";
			($asternumber, @therest) = split(/\s+/, $data);
			print " -> URL: $asteroidurl$asternumber\n";
			$url = "$asteroidurl$asternumber";
		}


	} elsif ($data =~ /,P/) {
		print "Got Planet!\n";
		($planet, $junk) = split(/,/, $data);
		$planet =~ tr/[A-Z]/[a-z]/;
		print " -> $planeturl$planet.html";
		$url = "$planeturl$planet.html";


	} else {
		print "Unknown!\n";
	}
	if ($url) {
		$cmd = "$browser $url";
		$pid = fork(); 
		exec($cmd) if (!$pid);
	}
}