added luastatus configHEADmaster

1 files changed, 177 insertions, 0 deletions

diff --git a/.config/luastatus-scripts-dwm/bluetooth.lua b/.config/luastatus-scripts-dwm/bluetooth.lua
new file mode 100644
index 0000000..f4807a0
--- /dev/null
+++ b/.config/luastatus-scripts-dwm/bluetooth.lua
@@ -0,0 +1,177 @@
+-- A widget to display currently connected and paired bluetooth devices.
+-- To change output format modify reprint_devices function.
+
+separator = " "
+
+-- Object paths look like /org/bluez/hci0/dev_XX_XX_XX_XX_XX_XX/somethingsomething
+function get_device_mac_address(device_object_path)
+    return device_object_path:gsub("/.*/dev_", ""):gsub("/.*", ""):gsub("_", ":")
+end
+
+-- For reference bluetoothctl devices output looks like that:
+-- Device XX:XX:XX:XX:XX:XX JBL T450BT
+-- Device YY:YY:YY:YY:YY:YY Redmi 8
+--
+-- Function returns mac addresses of all devices.
+function get_devices()
+    local devices = {}
+    local handle = io.popen(string.format("bluetoothctl devices"))
+    for line in handle:lines() do
+        table.insert(devices, string.match(line, "Device ([%x:]+)"))
+    end
+    handle:close()
+    return devices
+end
+
+function get_power_state()
+    local handle = io.popen(string.format("bluetoothctl show"))
+    local power_state = false
+    for line in handle:lines() do
+        local state = string.match(line, "^%s*PowerState:%s*(%w+)")
+        if state then
+            if state == "off" then 
+                power_state = false 
+            else 
+                power_state = true 
+            end
+            break
+        end
+    end
+    handle:close()
+
+    return power_state
+end
+
+-- For reference bluetoothctl info output looks like that:
+-- Device XX:XX:XX:XX:XX:XX (public)
+--         Name: JBL T450BT
+--         Alias: JBL T450BT
+--         Class: 0xFFFFFFFF
+--         Icon: audio-card
+--         Paired: yes
+--         Trusted: yes
+--         Blocked: no
+--         Connected: yes
+--         LegacyPairing: no
+--         UUID: Headset                   (xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx)
+--         ...
+--         UUID: Handsfree                 (xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx)
+--
+-- Given this input function returns a following table:
+-- [alias]         string  JBL T450BT
+-- [blocked]       boolean false
+-- [class]         string  0x00240404
+-- [connected]     boolean true
+-- [icon]          string  audio
+-- [legacypairing] boolean false
+-- [name]          string  JBL T450BT
+-- [paired]        boolean true
+-- [trusted]       boolean true
+function get_device_info(mac_address)
+    if mac_address == nil then
+        mac_address = ""
+    end
+    local device_info = {}
+    local handle = io.popen(string.format("bluetoothctl info %s", mac_address))
+    for line in handle:lines() do
+        local key, value = string.match(line, "(%w+): (.*)")
+        -- Filter junk
+        if key ~= "UUID" and key ~= nil and value ~= nil then
+            key = string.lower(key)
+            if key ~= "name" and key ~= "alias" and key ~= "icon" then
+                if value == "yes" then
+                    value = true
+                end
+                if value == "no" then
+                    value = false
+                end
+            end
+            device_info[key] = value
+        end
+    end
+    handle:close()
+    return device_info
+end
+
+devices = {}
+
+function reprint_devices(power_state)
+    if power_state then
+        local t = {}
+        for mac_address, device in pairs(devices) do
+            table.insert(t, string.format("󰂱  %s", device["alias"]))
+        end
+        if next(t) == nil then
+            return "󰂯"
+        else
+            return table.concat(t, separator)
+        end
+    else
+        return "󰂲"
+    end
+end
+
+widget = {
+    plugin = "dbus",
+    opts = {
+        greet = true,
+        -- https://git.kernel.org/pub/scm/bluetooth/bluez.git/tree/doc/device-api.txt
+        signals = {
+            {
+                sender = "org.bluez",
+                interface = "org.freedesktop.DBus.Properties",
+                signal = "PropertiesChanged",
+                arg0 = "org.bluez.Device1",
+                bus = "system"
+            }, {
+                sender = "org.bluez",
+                interface = "org.freedesktop.DBus.Properties",
+                signal = "PropertiesChanged",
+                arg0 = "org.bluez.Adapter1",
+                bus = "system"
+            }
+        }
+    },
+    cb = function(t)
+        local power_state = false
+        if t.what == "hello" then
+            power_state = get_power_state()
+            local mac_addresses = get_devices()
+            for i, mac_address in pairs(mac_addresses) do
+                local device = get_device_info(mac_address)
+                if device["connected"] and device["paired"] then
+                    devices[mac_address] = device
+                end
+            end
+        elseif t.what == "signal" then
+            -- For reference message from dbus looks like that:
+            -- table
+            -- [1]     string  org.bluez.Device1
+            -- [2]     table
+            -- [2]     [1]     table
+            -- [2]     [1]     [1]     string  SomethingSomething
+            -- [2]     [1]     [2]     boolean false
+            -- [2]     [2]     table
+            -- [2]     [2]     [1]     string  Connected
+            -- [2]     [2]     [2]     boolean true
+            -- [3]     table
+            if t.signal == "PropertiesChanged" then
+                power_state = get_power_state()
+                for i, message in pairs(t.parameters[2]) do
+                    if message[1] == "Connected" or message[1] == "Paired" then
+                        local mac_address = get_device_mac_address(t.object_path)
+                        if message[2] then
+                            local device = get_device_info(mac_address)
+                            if device["paired"] then
+                                devices[mac_address] = device
+                            end
+                        else
+                            devices[mac_address] = nil
+                        end
+                    end
+                end
+            end
+        end
+        return reprint_devices(power_state)
+    end
+}