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fizzbuzzr.rb
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fizzbuzzr.rb
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require 'serfx'
require 'curses'
require 'socket'
include Curses
@me = ARGV[0]
@role = ARGV[1]
@event = nil
@result = nil
@display_time = nil
class DistributedCounter
def initialize(divisble_by, my_hostname)
@divisble_by = divisble_by
@my_hostname = my_hostname
@counter_hostnames = []
@position = -1
end
def update_members(counter_hostnames)
@counter_hostnames = counter_hostnames
@position = counter_hostnames.sort.index(@my_hostname) || -1
end
def shows_for?(number)
number % @divisble_by == 0 &&
number / @divisble_by % @counter_hostnames.length == @position
end
end
@fizzer = DistributedCounter.new(3, ARGV[0])
@buzzer = DistributedCounter.new(5, ARGV[0])
def setup
init_screen
start_color
curs_set(0)
init_pair(COLOR_YELLOW, COLOR_BLACK, COLOR_YELLOW)
init_pair(COLOR_RED, COLOR_RED, COLOR_BLACK)
clear
refresh
end
def render_frame
clear
setpos(lines - 1, 0)
if @event
attron(color_pair(COLOR_YELLOW)) do
addstr(@event.ljust(cols))
end
else
addstr(@me)
end
@event = nil
setpos(2, 0)
addstr(@display_time.center(cols))
setpos(3, 0)
attron(color_pair(COLOR_RED)) do
if @result
addstr(@result.center(cols))
else
addstr(' ' * cols)
end
@result = nil
end
refresh
end
def update_counters_with_live_members(conn)
@fizzer.update_members(live_members_for(conn, 'fizz'))
@buzzer.update_members(live_members_for(conn, 'buzz'))
end
def live_members_for(conn, role)
conn.members_filtered({'role' => role}, 'alive').body['Members'].map { |member| member['Name'] }
end
def display_event(event)
members = event['Members']
host = members && members[0] && members[0]['Name']
@event = "Event: #{event['Event']} #{host}"
end
def calculate_result(time_i)
if @fizzer.shows_for?(time_i)
@result = "FIZZ"
elsif @buzzer.shows_for?(time_i)
@result = "BUZZ"
else
@result = nil
end
end
setup
begin
Serfx.connect do |conn|
update_counters_with_live_members(conn)
res, thread = conn.stream('*') do |event|
display_event(event)
update_counters_with_live_members(conn)
end
while(true) do
calculate_result(Time.now.to_i)
@display_time = Time.now.strftime("%H:%M:%S")
render_frame
sleep(1)
end
end
ensure
close_screen
end