Add lock.py to send custom lock and unlock messages.

lock.py

@@ -0,0 +1,30 @@
+#!/usr/bin/env python3
+
+import telegram
+import sys
+import datetime
+
+try:
+    import config
+except ImportError:
+    print("Missing Config. Exiting.")
+    exit()
+
+bot = telegram.Bot(token=config.api_key)
+
+if len(sys.argv) != 2:
+    print("Invalid number of parameters")
+    exit(1)
+
+arg = sys.argv[1]
+if arg == "lock":
+    today = datetime.datetime.today()
+    text = today.strftime(config.lock_message)
+    bot.send_message(chat_id=config.master_id, text=text)
+elif arg == "unlock":
+    today = datetime.datetime.today()
+    text = today.strftime(config.lock_message)
+    bot.send_message(chat_id=config.master_id, text=text)
+else:
+    print("Wrong parameter. Exiting.")
+    exit(1)

sample.config.py

@@ -13,3 +13,8 @@ lock = "xautolock -locknow"
 # Put the name of process that is running only when the screen is
 # locked.
 lock_process = "i3lock"
+
+# Lock and unlock message. The date is parsed according to strftime.
+# Check man strftime or http://strftime.org/
+lock_message = "You have locked your system - %c"
+unlock_message = "You have unlocked your system - %c"