Add new features to disa.lua (#2961)

1. Allow custom sound_pin & sound_extension
2. Allow customization of max_tries, pin_tries & extension_tries
3. Add fallback_destination - fall to it if caller did not entered extension number
4. Allow custom digit_timeout

resources/install/scripts/disa.lua

@@ -24,8 +24,7 @@
 
 --predefined variables
 	predefined_destination = "";
-	max_tries = "3";
+	fallback_destination = "";
-	digit_timeout = "5000";
 
 --define the trim function
 	require "resources.functions.trim";
@@ -44,15 +43,22 @@
 --get and save the variables
 	if (session:ready()) then
 		sound_greeting = session:getVariable("sound_greeting");
+		sound_pin = session:getVariable("sound_pin");
+		sound_extension = session:getVariable("sound_extension");
 		pin_number = session:getVariable("pin_number");
 		sounds_dir = session:getVariable("sounds_dir");
 		caller_id_name = session:getVariable("caller_id_name");
 		caller_id_number = session:getVariable("caller_id_number");
 		predefined_destination = session:getVariable("predefined_destination");
+		fallback_destination = session:getVariable("fallback_destination");
 		digit_min_length = session:getVariable("digit_min_length");
 		digit_max_length = session:getVariable("digit_max_length");
+		digit_timeout = session:getVariable("digit_timeout");
 		context = session:getVariable("context");
 		privacy = session:getVariable("privacy");
+		max_tries = session:getVariable("max_tries");
+		pin_tries = session:getVariable("pin_tries");
+		extension_tries = session:getVariable("extension_tries");
 	end
 
 --set the sounds path for the language, dialect and voice
@@ -74,6 +80,30 @@
 		digit_max_length = "11";
 	end
 
+	if (not digit_timeout) then
+	    digit_timeout = "5000";
+	end
+
+	if (not sound_pin) then
+	    sound_pin = sounds_dir.."/"..default_language.."/"..default_dialect.."/"..default_voice.."/ivr/ivr-please_enter_pin_followed_by_pound.wav";
+	end
+
+	if (not sound_extension) then
+	    sound_extension = sounds_dir.."/"..default_language.."/"..default_dialect.."/"..default_voice.."/ivr/ivr-enter_destination_telephone_number.wav";
+	end
+
+	if (not max_tries) then
+	    max_tries = "3";
+	end
+
+	if (not pin_tries) then
+	    pin_tries = max_tries;
+	end
+
+	if (not extension_tries) then
+	    extension_tries = max_tries;
+	end
+
 --if the sound_greeting is provided then play it
 	if (session:ready() and sound_greeting) then
 		session:streamFile(sound_greeting);
@@ -84,7 +114,7 @@
 	if (session:ready() and pin_number) then
 		min_digits = string.len(pin_number);
 		max_digits = string.len(pin_number)+1;
-		digits = session:playAndGetDigits(min_digits, max_digits, max_tries, digit_timeout, "#", sounds_dir.."/"..default_language.."/"..default_dialect.."/"..default_voice.."/ivr/ivr-please_enter_pin_followed_by_pound.wav", "", "\\d+");
+		digits = session:playAndGetDigits(min_digits, max_digits, pin_tries, digit_timeout, "#", sound_pin, "", "\\d+");
 		if (digits == pin_number) then
 			--pin is correct
 		else
@@ -102,7 +132,10 @@
 			destination_number = predefined_destination;
 		else
 			dtmf = ""; --clear dtmf digits to prepare for next dtmf request
-			destination_number = session:playAndGetDigits(digit_min_length, digit_max_length, max_tries, digit_timeout, "#", sounds_dir.."/"..default_language.."/"..default_dialect.."/"..default_voice.."/ivr/ivr-enter_destination_telephone_number.wav", "", "\\d+");
+			destination_number = session:playAndGetDigits(digit_min_length, digit_max_length, extension_tries, digit_timeout, "#", sound_extension, "", "\\d+");
+			if (string.len(destination_number) == 0 and fallback_destination) then
+			    destination_number = fallback_destination;
+			end
 			--if (string.len(destination_number) == 10) then destination_number = "1"..destination_number; end
 		end
 	end