checkLex.py

def elicit_slot(messageType, messageContent, slots, slotToElicit, completed):
    response = {
        "sessionAttributes": {
            "Completed": completed
        },
        "dialogAction": {
            "type": "ElicitSlot",
            "message": {
                "contentType": messageType,
                "content": messageContent
            },
            "intentName": "ResetPW",
            "slots": slots,
            "slotToElicit": slotToElicit
        }
    }
    return response


def delegate_slot(slots, completed):
    response = {
        "sessionAttributes": {
            "Completed": completed
        },
        "dialogAction": {
            "type": "Delegate",
            "slots": slots
        }
    }
    return response


def chkUserId(slots, sessionAttributes):
    if((slots['UserID'] is None) or ((slots["UserID"] is not None) and (len(slots["UserID"]) != 6))):
        messageContent = "That format seems incorrect. Let's try again. What is your user id?"
        return elicit_slot("PlainText", messageContent, slots, "UserID", "None")
    else:
        return delegate_slot(slots, "userid")


def chkDob(slots, sessionAttributes):
    if(slots["DOB"] is None):
        messageContent = "That format seems incorrect. Let's try again. What is your Date of Birth?"
        return elicit_slot("PlainText", messageContent, slots, "DOB", "userid")
    else:
        return delegate_slot(slots, "dob")


def chkMonth(slots, sessionAttributes, confirmation, outputDialogMode):
    if(slots["MonthStarted"] is None):
        messageContent = "That month seems incorrect. Let's try again. What month did you start?"
        return elicit_slot("PlainText", messageContent, slots, "MonthStarted", "dob")
    else:
        return confirmIntent(slots, sessionAttributes, confirmation, outputDialogMode)


def confirmIntent(slots, sessionAttributes, confirmation, outputDialogMode):
    if(confirmation == "None"):
        endData = {
            "dialogAction": {
                "type": "ConfirmIntent",
                "message": {
                },
                "intentName": "ResetPW",
                "slots": slots
            }
        }
        if(outputDialogMode == "Voice"):
            endData["dialogAction"]["message"]["contentType"] = "SSML"
            endData["dialogAction"]["message"]["content"] = "<speak>Just to confirm, your user id is <say-as interpret-as=\"digits\">" + slots["UserID"] + \
                "</say-as>, your date of birth is " + \
                slots["DOB"] + " and the month of your start date is " + \
                slots["MonthStarted"] + ". Is that correct?</speak>"
        else:
            endData["dialogAction"]["message"]["contentType"] = "PlainText"
            endData["dialogAction"]["message"]["content"] = "Just to confirm, your user id is " + slots["UserID"] + \
                ", your date of birth is " + \
                slots["DOB"] + " and the month of your start date is " + \
                slots["MonthStarted"] + ". Is that correct?"
    elif((confirmation == "Denied")):
        endData = {
            "dialogAction": {
                "type": "Close",
                "fulfillmentState": "Failed",
                "message": {
                    "contentType": "PlainText",
                    "content": "Please call back and try again."
                }
            }
        }
    else:
        endData = delegate_slot(slots, "confirmed")
    return endData


def lambda_handler(event, context):
    slots = event['currentIntent']['slots']
    sessionAttributes = event['sessionAttributes']
    confirmation = event['currentIntent']["confirmationStatus"]
    outputDialogMode = event["outputDialogMode"]

    if(sessionAttributes is None or "Completed" not in sessionAttributes):
        messageContent = "Sure, i can help with that! But first, i need to verify your identity. What is your user id?"
        return elicit_slot("PlainText", messageContent, slots, "UserID", "None")
    
    if(sessionAttributes["Completed"] == "None"):
        return chkUserId(slots, sessionAttributes)

    if(sessionAttributes["Completed"] == "userid"):
        return chkDob(slots, sessionAttributes)

    if(sessionAttributes["Completed"] == "dob"):
        return chkMonth(slots, sessionAttributes, confirmation, outputDialogMode)