Add gpmdp recipe (#108)

recipes.mdwn

@@ -19,6 +19,7 @@ to improve your Awesome setup.
 * [PulseAudio](https://github.com/stefano-m/awesome-pulseaudio_widget)
 * [Connman (network manager)](https://github.com/stefano-m/awesome-connman_widget)
 * [Battery Indicator (UPower)](https://github.com/stefano-m/awesome-power_widget)
+* [[Google Play Music Desktop Player|recipes/gpmdp]]
 
 ## Libraries
 

recipes/gpmdp.lua

@@ -0,0 +1,104 @@
+
+--[[
+
+        Licensed under GNU General Public License v2
+        * (c) 2017, Greg Flynn
+
+--]]
+local awful = require("awful")
+local naughty = require("naughty")
+local io, next, os, string, table = io, next, os, string, table
+
+-- Google Play Music Desktop Player widget
+-- requires: curl and dkjson or lain
+
+local gpmdp = {
+    notify        = "on",
+    followtag     = false,
+    file_location = os.getenv("HOME") .. "/.config/Google Play Music Desktop Player/json_store/playback.json",
+    notification_preset = {
+        title     = "Now playing",
+        icon_size = dpi(128),
+        timeout   = 6
+    },
+    notification  = nil,
+    current_track = nil,
+    album_cover   = "/tmp/gpmcover"
+}
+
+function gpmdp.notification_on()
+    local gpm_now = gpmdp.latest
+    gpmdp.current_track = gpm_now.title
+
+    if gpmdp.followtag then gpmdp.notification_preset.screen = awful.screen.focused() end
+    awful.spawn.easy_async({"curl", gpm_now.cover_url, "-o", gpmdp.album_cover}, function(stdout)
+        local old_id = nil
+        if gpmdp.notification then old_id = gpmdp.notification.id end
+
+        gpmdp.notification = naughty.notify({
+            preset = gpmdp.notification_preset,
+            icon = gpmdp.album_cover,
+            replaces_id = old_id
+        })
+    end)
+end
+
+function gpmdp.notification_off()
+    if not gpmdp.notification then return end
+    naughty.destroy(gpmdp.notification)
+    gpmdp.notification = nil
+end
+
+function gpmdp.get_lines(file)
+    local f = io.open(file)
+    if not f then
+        return
+    else
+        f:close()
+    end
+
+    local lines = {}
+    for line in io.lines(file) do
+        lines[#lines + 1] = line
+    end
+    return lines
+end
+
+gpmdp.widget = awful.widget.watch({"pidof", "Google Play Music Desktop Player"}, 2, function(widget, stdout)
+    local filelines = gpmdp.get_lines(gpmdp.file_location)
+    if not filelines then return end -- GPMDP not running?
+
+    gpm_now = { running = stdout ~= '' }
+
+    if not next(filelines) then
+        gpm_now.running = false
+        gpm_now.playing = false
+    else
+        dict, pos, err    = require("dkjson").decode(table.concat(filelines), 1, nil) -- dkjson
+        -- dict, pos, err    = require("lain.util").dkjson.decode(table.concat(filelines), 1, nil) -- lain
+        gpm_now.artist    = dict.song.artist
+        gpm_now.album     = dict.song.album
+        gpm_now.title     = dict.song.title
+        gpm_now.cover_url = dict.song.albumArt
+        gpm_now.playing   = dict.playing
+    end
+    gpmdp.latest = gpm_now
+
+    -- customize here
+    gpmdp_notification_preset.text = string.format("%s (%s) - %s", gpm_now.artist, gpm_now.album, gpm_now.title)
+    widget:set_text(gpm_now.artist .. " - " .. gpm_now.title)
+
+    if gpm_now.playing then
+        if gpmdp.notify == "on" and gpm_now.title ~= gpmdp.current_track then
+            gpmdp.notification_on()
+        end
+    elseif not gpm_now.running then
+        gpmdp.current_track = nil
+    end
+end)
+
+-- add mouse hover
+gpmdp.widget:connect_signal("mouse::enter", gpmdp.notification_on)
+gpmdp.widget:connect_signal("mouse::leave", gpmdp.notification_off)
+
+return gpmdp

recipes/gpmdp.mdwn

@@ -0,0 +1,20 @@
+# Google Play Music Desktop Player watcher
+
+This widget can be used to display the current track information and state of [Google Play Music Desktop Player](https://www.googleplaymusicdesktopplayer.com/).
+
+1. Download `gpmdp.lua` [here](https://awesomewm.org/recipes/gpmdp.lua)
+2. Add your customization to `gpmdp.lua` after `-- customize here`
+3. Import `gpmdp.lua` into your `rc.lua`
+    ```lua
+    local gpmdp = require("path/to/gpmdp.lua")
+    ```
+4. Add the widget to your wibar
+    ```lua
+    s.mywibox:setup {
+        layout = wibox.layout.align.horizontal,
+        {
+            layout = wibox.layout.fixed.horizontal,
+            gpmdp.widget,
+            -- ...
+        }
+    ```