#!/usr/bin/env ruby
# Copyright (C) 2013, Eric Wong <normalperson@yhbt.net> and all contributors
# License: GPLv3 or later (https://www.gnu.org/licenses/gpl-3.0.txt)
require 'yaml'
require 'dtas/unix_client'
usage = "#$0 <active-set|active-add|active-sub|nonblock|active> SINK"
c = DTAS::UNIXClient.new
action = ARGV.shift
sink_args = ARGV

buf = c.req("sink ls")
abort(buf) if buf =~ /\AERR/
player_sinks = buf.split(/ /)

non_existent = sink_args - player_sinks
non_existent[0] and
  abort "non-existent sink(s): #{non_existent.join(' ')}"

def activate_sinks(c, sink_names)
  sink_names.each { |name| c.req_ok("sink ed #{name} active=true") }
end

def deactivate_sinks(c, sink_names)
  sink_names.each { |name| c.req_ok("sink ed #{name} active=false") }
end

def filter(c, player_sinks, key)
  rv = []
  player_sinks.each do |name|
    buf = c.req("sink cat #{name}")
    sink = YAML.load(buf)
    rv << sink["name"] if sink[key]
  end
  rv
end

case action
when "active-set"
  activate_sinks(c, sink_args)
  deactivate_sinks(c, player_sinks - sink_args)
when "active-add" # idempotent
  activate_sinks(c, sink_args)
when "active-sub"
  deactivate_sinks(c, sink_args)
when "active", "nonblock"
  abort "`#$0 #{action}' takes no arguments" if sink_args[0]
  puts filter(c, player_sinks, action).join(' ')
else
  abort usage
end