Added the option to retrieve the led user input

+ User input is matched with the luxafor.Leds attributes
+ Also added some annotations

luxafor/cli.py

@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*-
+import logging
 import sys
 
 import click
@@ -6,11 +7,14 @@ import click
 from luxafor import luxafor
 
 
+logger = logging.getLogger()
+
+
 def get_luxafor():
     return luxafor.Luxafor()
 
 
-def convert_hex_to_dec_color(hex_color):
+def convert_hex_to_dec_color(hex_color: str) -> tuple:
     (red, green, blue) = hex_color[0:2], hex_color[2:4], hex_color[4:6]
 
     red = int(red, 16)
@@ -20,12 +24,31 @@ def convert_hex_to_dec_color(hex_color):
     return (red, green, blue)
 
 
-def convert_dec_to_hex_color(red, green, blue):
+def convert_dec_to_hex_color(red: int, green: int, blue: int) -> str:
     colors = (red, green, blue)
     return "".join([
         hex(color).split('x')[1].upper() for color in colors])
 
 
+def get_matching_led(led: str) -> hex:
+    """
+    Returns a mathching Led object from the :class:`luxafor.Leds` based
+    on the user input in the CLI.
+
+    If no valid input is given defaults to all leds.
+    """
+    led_group = getattr(luxafor.Leds, led.upper(), False)
+    if led_group:
+        return led_group
+
+    led_number = getattr(luxafor.Leds, 'LED%s' % led, False)
+    if led_number:
+        return led_number
+
+    logger.info('Led(s) %s not found, falling back to all' % led)
+    return luxafor.Leds.ALL
+
+
 @click.group()
 def cli():
     pass
@@ -60,7 +83,7 @@ def dec2hex(red, green, blue):
 
 
 @cli.command()
-@click.option('--led', default=luxafor.Leds.ALL)
+@click.option('--led', default='all')
 @click.argument('color')
 def set(led, color):
     """Sets the flag with a fixed color."""
@@ -68,11 +91,11 @@ def set(led, color):
 
     flag = get_luxafor()
 
-    flag.set_color(*color, led=led)
+    flag.set_color(*color, led=get_matching_led(led))
 
 
 @cli.command()
-@click.option('--led', default=luxafor.Leds.ALL)
+@click.option('--led', default='all')
 @click.option('--speed', default=128, type=click.IntRange(0, 255))
 @click.argument('color')
 def fade(led, speed, color):
@@ -80,11 +103,11 @@ def fade(led, speed, color):
 
     flag = get_luxafor()
 
-    flag.fade(*color, led=led, speed=speed)
+    flag.fade(*color, led=get_matching_led(led), speed=speed)
 
 
 @cli.command()
-@click.option('--led', default=luxafor.Leds.ALL)
+@click.option('--led', default='all')
 @click.option('--speed', default=6, type=click.IntRange(0, 255))
 @click.option('--repeat', default=1, type=click.IntRange(1, 255))
 @click.argument('color')
@@ -93,7 +116,8 @@ def strobe(led, speed, repeat, color):
 
     flag = get_luxafor()
 
-    flag.strobe(*color, led=led, speed=speed, repeat=repeat)
+    flag.strobe(*color, led=get_matching_led(led),
+                speed=speed, repeat=repeat)
 
 
 @cli.command()