Jenkinsfile-input-choice

def userInput(){
    def userInput
    while(true){
        userInput=input(
            id: "USERINPUT",
            message: "Please provide the following input: ",
            parameters: [
                string(
                    name:"USERNAME",
                    defaultValue:"",
                    description:"Please provide a username: "
                ),
                choice(
                    name:"ACTION",
                    description:"Please select an action: ",
                    choices:[
                        "ADD",
                        "DELETE",
                        "MODIFY"
                    ]
                )    
            ]
        )
        if (userInput["USERNAME"].trim()){
            break
        } else {
            echo "The username can't be empty. Please re-input a username."
        }
    }
    return userInput
}

def printInput(inputValues){
    echo "******** Printing input ********"
    /*
    echo "The input username is ${inputValues["USERNAME"]}."
    echo "The selected action is ${inputValues["ACTION"]}."
    if (inputValues["ACTION"] == "ADD") {
        echo "The user ${inputValues["USERNAME"]} will be ${inputValues["ACTION"]}. "
    } else if (inputValues["ACTION"] == "DELETE") {
        echo "The user ${inputValues["USERNAME"]} will be ${inputValues["ACTION"]}. "
    } else if (inputValues["ACTION"] == "MODIFY") {
        echo "The user ${inputValues["USERNAME"]} will be ${inputValues["ACTION"]}. "
    }
    */
    
    echo "The user ${inputValues["USERNAME"]} will be ${inputValues["ACTION"]}. "
    
    echo "******** Ending Printing ********"
}

node {
    stage("User Input"){
        script{
            def inputValues=userInput()
            printInput(inputValues)
        }
    }
}