Switch to Ruby and MineQuery to remove an extra plugin dependency

Most servers have minequery installed already, no need to also have OnlinePlayers when this is what MineQuery was built for.

plugins/minecraft/minecraft-users

@@ -1,32 +1,36 @@
-#!/bin/sh
+#!/usr/local/bin/ruby
 # Config:
-# [minecraft_players
-# playerfile /etc/minecraft/players.txt
-# subtract true
+# [minecraft_users]
+# env.host awesomeserver.com
+# env.port 25566
 #
-# playerfile - location of player list file, for example from the OnlineUsers
-#	plugin
-# subtract - OnlineUsers has a header above the user list, set this to true
-#	to subtract 1 from the output to compensate
-case $1 in
-	config)
-		cat <<'EOM'
-graph_title Connected players
-graph_vlabel players
-players.label players
-graph_info Number of players connected to Minecraft
-graph_category Minecraft
-EOM
-	exit 0;;
-esac
 
-echo -n "players.value "
+require 'socket'
 
-count=`wc -l ${playerfile} | cut -d' ' -f1`
-if [ $subtract="true" ];
-then
-	echo -n "$(($count - 1))"
-else
-	echo $count
-fi
+if ARGV[0] == 'config'
+    puts "graph_title Connected players"
+    puts "graph_vlabel players"
+    puts "players.label players"
+    puts "graph_info Number of players connected to Minecraft"
+    puts "graph_category Minecraft"
+    exit
+end
 
+host = ENV['host']
+host = 'localhost' unless host
+
+port = ENV['port']
+port = '25566' unless port
+
+socket = TCPSocket.new(host, port)
+socket.puts "QUERY"
+
+response = socket.read
+response = response.split("\n")
+
+server_port = response[0].split(" ", 2)[1].to_i
+player_count = response[1].split(" ", 2)[1].to_i
+max_players = response[2].split(" ", 2)[1].to_i
+player_list = response[3].split(" ", 2)[1].chomp[1..-2]
+
+puts "players.value #{player_count}"