i3: Added dunst to i3blocks

i3/.config/i3blocks/config

@@ -18,6 +18,12 @@ command=./activity
 interval=10
 LABEL=
 
+[dunst]
+command=./dunst
+markup=pango
+interval=once
+format=json
+
 [volume]
 command=./volume
 LABEL=

i3/.config/i3blocks/dunst

@@ -0,0 +1,60 @@
+#!/usr/bin/env python3
+"""
+A do-not-disturb button for muting Dunst notifications in i3 using i3blocks
+Mute is handled by passing 'DUNST_COMMAND_PAUSE' and 'DUNST_COMMAND_RESUME' to
+the notify-send script and the 'DUNST_MUTE' environment variable is set to keep
+track of the toggle.
+"""
+
+__author__ = "Jessey White-Cinis <j@cin.is>"
+__copyright__ = "Copyright (c) 2019 Jessey White-Cinis"
+__license__ = "MIT"
+__version__ = "1.1.0"
+
+import os
+import subprocess
+import json
+
+def mute_on():
+    '''Turns off dunst notifications'''
+    subprocess.run(["dunstctl", "set-paused", "true"], check=True)
+    return {
+        "full_text":"<span font='Font Awesome 5 Free Solid' color='#BE616E'>\uf1f6</span>",
+        "DUNST_MUTE":"on"
+    }
+
+def mute_off():
+    '''Turns back on dunst notifications'''
+    subprocess.run(["dunstctl", "set-paused", "false"], check=True)
+    return {
+        "full_text":"<span font='Font Awesome 5 Free Solid' color='#FFFFFF'>\uf0f3</span>",
+        "DUNST_MUTE":"off"
+    }
+
+def clicked():
+    '''Returns True if the button was clicked'''
+    button = "BLOCK_BUTTON" in os.environ and os.environ["BLOCK_BUTTON"]
+    return bool(button)
+
+def muted():
+    '''Returns True if Dunst is muted'''
+    cmd = ['dunstctl', 'is-paused']
+    proc = subprocess.Popen(cmd, stdout=subprocess.PIPE)
+    output = proc.communicate()[0]
+    return u'true' ==  output.strip().decode("UTF-8")
+
+if clicked():
+    # toggle button click to turn mute on and off
+    if muted():
+        RTN = mute_off()
+    else:
+        RTN = mute_on()
+
+else:
+    # Set default state using 'DUNST_MUTE' environment variable
+    if muted():
+        RTN = mute_on()
+    else:
+        RTN = mute_off()
+
+print(json.dumps(RTN))