Support RGB, hex values, and add known colours to DC Webmail Notifier

lib/device_recipes/dream_cheeky/webmail_notifier.rb

@@ -1,39 +1,56 @@
 module Blinky
   module DreamCheeky
     module WebmailNotifier
+      COLOURS = {
+        :black  => "000000",
+        :white  => "ffffff",
+        :green  => "00ff00",
+        :red    => "ff0000",
+        :blue   => "0000ff",
+        :orange => "ff2a00",
+        :teal   => "00ffff",
+        :yellow => "ffff00",
+        :pink   => "ff00ff"
+      }
+
+      COLOURS.each do |name, hex_code|
+        define_method(name) do
+          colour_hex!(hex_code)
+        end
+      end
+
+      alias :success! :green
+      alias :failure! :red
+      alias :building! :blue
+      alias :warning! :orange
+      alias :off! :black
 
-      def success!
-        colour!("\x00\xFF\x00") 
-      end
-
-      def failure!
-        colour!("\xFF\x00\x00") 
-      end
-
-      def building! 
-        colour!("\x00\x00\xFF") 
+      def init
+        send_data "\x1f\x02\x00\x2e\x00\x00\x2b\x03"
+        send_data "\x00\x02\x00\x2e\x00\x00\x2b\x04"
+        send_data "\x00\x00\x00\x2e\x00\x00\x2b\x05"
       end
 
-      def warning!
-        colour!("\xFF\x2A\x00") 
+      def colour!(colour)
+        send_data(colour + "\x00\x00\x00\x00\x05")
       end
 
-      def off!
-        colour!("\x00\x00\x00") 
+      def colour_rgb!(red, green, blue)
+        hex_sequence = [red, green, blue].map(&:chr).join
+        colour!(hex_sequence)
       end
 
-      def init
-        send "\x1f\x02\x00\x2e\x00\x00\x2b\x03"
-        send "\x00\x02\x00\x2e\x00\x00\x2b\x04"
-        send "\x00\x00\x00\x2e\x00\x00\x2b\x05"
-      end
+      def colour_hex!(hex_code)
+        rgb_values = hex_code.scan(/\h{2}/).take(3).map do |n|
+          n.to_i(16)
+        end
 
-      def colour!(colour)
-        send(colour + "\x00\x00\x00\x00\x05")  
+        colour_rgb!(*rgb_values)
       end
 
       private
-      def send(data)
+
+      def send_data(data)
         @handle.usb_control_msg(0x21, 0x09, (3 << 8) | 1, 0, data, 0)
       end