lain/widgets/mpd.lua

--[[
                                                  
     Licensed under GNU General Public License v2 
      * (c) 2013, Luke Bonham                     
      * (c) 2010, Adrian C. <anrxc@sysphere.org>  
                                                  
--]]

local helpers      = require("lain.helpers")
local async        = require("lain.asyncshell")

local escape_f     = require("awful.util").escape
local naughty      = require("naughty")
local wibox        = require("wibox")

local os           = { execute = os.execute,
                       getenv  = os.getenv }
local math         = { floor   = math.floor }
local mouse        = mouse
local string       = { format  = string.format,
                       match   = string.match,
                       gmatch  = string.gmatch }

local setmetatable = setmetatable

-- MPD infos
-- lain.widgets.mpd
local mpd = {}

local function worker(args)
    local args        = args or {}
    local timeout     = args.timeout or 2
    local password    = args.password or ""
    local host        = args.host or "127.0.0.1"
    local port        = args.port or "6600"
    local music_dir   = args.music_dir or os.getenv("HOME") .. "/Music"
    local cover_size  = args.cover_size or 100
    local default_art = args.default_art or ""
    local notify      = args.notify or "on"
    local followmouse = args.followmouse or false
    local echo_cmd    = args.echo_cmd or "echo"
    local settings    = args.settings or function() end

    local mpdcover = helpers.scripts_dir .. "mpdcover"
    local mpdh = "telnet://" .. host .. ":" .. port
    local echo = echo_cmd .. " 'password " .. password .. "\nstatus\ncurrentsong\nclose'"

    mpd.widget = wibox.widget.textbox('')

    mpd_notification_preset = {
        title   = "Now playing",
        timeout = 6
    }

    helpers.set_map("current mpd track", nil)

    function mpd.update()
        async.request(echo .. " | curl --connect-timeout 1 -fsm 3 " .. mpdh, function (f)
            mpd_now = {
                random_mode  = false,
                single_mode  = false,
                repeat_mode  = false,
                consume_mode = false,
                pls_pos      = "N/A",
                pls_len      = "N/A",
                state        = "N/A",
                file         = "N/A",
                name         = "N/A",
                artist       = "N/A",
                title        = "N/A",
                album        = "N/A",
                genre        = "N/A",
                track        = "N/A",
                date         = "N/A",
                time         = "N/A",
                elapsed      = "N/A"
            }

            for line in string.gmatch(f, "[^\n]+") do
                for k, v in string.gmatch(line, "([%w]+):[%s](.*)$") do
                    if     k == "state"          then mpd_now.state        = v
                    elseif k == "file"           then mpd_now.file         = v
                    elseif k == "Name"           then mpd_now.name         = escape_f(v)
                    elseif k == "Artist"         then mpd_now.artist       = escape_f(v)
                    elseif k == "Title"          then mpd_now.title        = escape_f(v)
                    elseif k == "Album"          then mpd_now.album        = escape_f(v)
                    elseif k == "Genre"          then mpd_now.genre        = escape_f(v)
                    elseif k == "Track"          then mpd_now.track        = escape_f(v)
                    elseif k == "Date"           then mpd_now.date         = escape_f(v)
                    elseif k == "Time"           then mpd_now.time         = v
                    elseif k == "elapsed"        then mpd_now.elapsed      = string.match(v, "%d+")
                    elseif k == "song"           then mpd_now.pls_pos      = v
                    elseif k == "playlistlength" then mpd_now.pls_len      = v
                    elseif k == "repeat"         then mpd_now.repeat_mode  = v ~= "0"
                    elseif k == "single"         then mpd_now.single_mode  = v ~= "0"
                    elseif k == "random"         then mpd_now.random_mode  = v ~= "0"
                    elseif k == "consume"        then mpd_now.consume_mode = v ~= "0"
                    end
                end
            end

            mpd_notification_preset.text = string.format("%s (%s) - %s\n%s", mpd_now.artist,
                                           mpd_now.album, mpd_now.date, mpd_now.title)
            widget = mpd.widget
            settings()

            if mpd_now.state == "play"
            then
                if notify == "on" and mpd_now.title ~= helpers.get_map("current mpd track")
                then
                    helpers.set_map("current mpd track", mpd_now.title)

                    if string.match(mpd_now.file, "http.*://") == nil
                    then -- local file
                        os.execute(string.format("%s %q %q %d %q", mpdcover, music_dir,
                                   mpd_now.file, cover_size, default_art))
                        current_icon = "/tmp/mpdcover.png"
                    else -- http stream
                        current_icon = default_art
                    end

                    if followmouse then
                        mpd_notification_preset.screen = mouse.screen
                    end

                    mpd.id = naughty.notify({
                        preset = mpd_notification_preset,
                        icon = current_icon,
                        replaces_id = mpd.id,
                    }).id
                end
            elseif mpd_now.state ~= "pause"
            then
                helpers.set_map("current mpd track", nil)
            end
        end)
    end

    helpers.newtimer("mpd", timeout, mpd.update)

    return setmetatable(mpd, { __index = mpd.widget })
end

return setmetatable(mpd, { __call = function(_, ...) return worker(...) end })