contrib/scripts/mpd.lua

   1 -- Authors: Steve Jothen <sjothen@gmail.com>
   2 -- License: Unknown
   3 -- Last Changed: Unknown
   4 --
   5 -- Small interface to MusicPD
   6 --
   7 -- Author: Steve Jothen <sjothen at gmail dot com>
   8 --
   9 -- Requires netcat
  10 --
  11 -- Change your path/settings according to your setup
  12 --
  13 -- defbindings("WScreen", {
  14 --   kpress("KP_6", "MusicPD.next()"),  -- next song
  15 --   kpress("KP_4", "MusicPD.previous()"), -- previous song
  16 --   kpress("KP_2", "MusicPD.volume_down()"), -- volume down settings.volume_delta units
  17 --   kpress("KP_8", "MusicPD.volume_up()"), -- volume up ....
  18 --   kpress("KP_5", "MusicPD.toggle_play()") -- toggle play/pause/stop
  19 -- })
  20
  21 local netcat = "/bin/netcat"
  22
  23 local settings = {
  24   hostname = "localhost",
  25   password = nil,
  26   port = 6600,
  27   volume_delta = 10
  28 }
  29
  30 MusicPD = {}
  31
  32 function MusicPD.file_exists()
  33   if io.open(netcat, "r") then -- check to see if file exists
  34     return true
  35   else
  36     return false
  37   end
  38 end
  39
  40 -- creates the appropriate string to call with io.popen
  41 --
  42 function MusicPD.create_command(command)
  43   local arguments = nil
  44   if settings.password then
  45     arguments = string.format(
  46                 "echo -n \"password %s\n%s\nclose\n\" | %s %s %d",
  47                 settings.password, command, netcat, settings.hostname, settings.port)
  48
  49   else
  50     arguments = string.format(
  51                 "echo -n \"%s\nclose\n\" | %s %s %d",
  52                 command, netcat, settings.hostname, settings.port)
  53   end
  54   return arguments
  55 end
  56
  57 -- calls the command and returns table of key, value pairs
  58 --
  59 function MusicPD.call_command(command)
  60   local arg_cmd = MusicPD.create_command(command)
  61   local values = {}
  62   if MusicPD.file_exists() then
  63     local handle = io.popen(arg_cmd, "r")
  64     local line = handle:read("*l")
  65     while line do
  66       local _, _, key, value = string.find(line, "(.+):%s(.+)")
  67       if key then
  68         values[string.lower(key)] = value
  69       end
  70       line = handle:read("*l")
  71     end
  72     handle:close()
  73   end
  74   return values
  75 end
  76
  77 function MusicPD.next()
  78   MusicPD.call_command("next")
  79 end
  80
  81 function MusicPD.previous()
  82   MusicPD.call_command("previous")
  83 end
  84
  85 function MusicPD.pause()
  86   MusicPD.call_command("pause")
  87 end
  88
  89 function MusicPD.stop()
  90   MusicPD.call_command("stop")
  91 end
  92
  93 function MusicPD.volume_up()
  94   local stats = MusicPD.call_command("status")
  95   local cur_volume = tonumber(stats.volume)
  96   local new_volume
  97   if cur_volume == 100 then
  98     return nil
  99   elseif cur_volume + settings.volume_delta > 100 then
 100     new_volume = string.format("setvol %d", 100)
 101   else
 102     new_volume = string.format("setvol %d", settings.volume_delta + cur_volume)
 103   end
 104   MusicPD.call_command(new_volume)
 105 end
 106
 107 function MusicPD.volume_down()
 108   local stats = MusicPD.call_command("status")
 109   local cur_volume = tonumber(stats.volume)
 110   local new_volume
 111   if cur_volume == 0 then
 112     return nil
 113   elseif cur_volume - settings.volume_delta < 0 then
 114     new_volume = string.format("setvol %d", 0)
 115   else
 116     new_volume = string.format("setvol %d", cur_volume - settings.volume_delta)
 117   end
 118   MusicPD.call_command(new_volume)
 119 end
 120
 121 function MusicPD.toggle_random()
 122   local stats = MusicPD.call_command("status")
 123   local random = tonumber(stats.random)
 124   if random == 0 then
 125     MusicPD.call_command("random 1")
 126   elseif random == 1 then
 127     MusicPD.call_command("random 0")
 128   end
 129 end
 130
 131 function MusicPD.toggle_repeat()
 132   local stats = MusicPD.call_command("status")
 133   local rpt = tonumber(stats["repeat"])
 134   if rpt == 0 then
 135     MusicPD.call_command("repeat 1")
 136   else
 137     MusicPD.call_command("repeat 0")
 138   end
 139 end
 140
 141 function MusicPD.toggle_play()
 142   local stats = MusicPD.call_command("status")
 143   if stats.state == "play" then
 144     MusicPD.call_command("pause")
 145   elseif stats.state == "pause" then
 146     MusicPD.call_command("pause")
 147   elseif stats.state == "stop" then
 148     MusicPD.call_command("play")
 149   end
 150 end
 151
 152 defbindings("WScreen", {
 153   kpress("KP_6", "MusicPD.next()"),
 154   kpress("KP_4", "MusicPD.previous()"),
 155   kpress("KP_2", "MusicPD.volume_down()"),
 156   kpress("KP_8", "MusicPD.volume_up()"),
 157   kpress("KP_5", "MusicPD.toggle_play()"),
 158   kpress("KP_7", "MusicPD.toggle_repeat()"),
 159   kpress("KP_9", "MusicPD.toggle_random()")
 160 })
 161