func AskQuestion()

in pkg/question/question.go [57:125]
51 lines of code
21 McCabe index (conditional complexity)

func AskQuestion(input *AskQuestionInput) string {
	fmt.Println()
	if input.OptionsString != nil {
		fmt.Print(*input.OptionsString)
	}

	if input.DefaultOptionRepr != nil {
		fmt.Printf("%s [%s]:  ", input.QuestionString, *input.DefaultOptionRepr)
	} else if input.DefaultOption != nil {
		fmt.Printf("%s [%s]:  ", input.QuestionString, *input.DefaultOption)
	} else {
		fmt.Printf(input.QuestionString + ": ")
	}

	// Keep asking for user input until one valid input in entered
	for {
		// Read input from the user and convert CRLF to LF
		reader := bufio.NewReader(os.Stdin)
		answer, _ := reader.ReadString('\n')
		answer = strings.Replace(answer, "\n", "", -1)

		// If no input is entered, simply return the default value, if there is one
		if answer == "" && input.DefaultOption != nil {
			return *input.DefaultOption
		}

		// Check if the answer is a valid index in the indexed options. If so, return the option value
		if input.IndexedOptions != nil {
			index, err := strconv.Atoi(answer)
			if err == nil && index >= 1 && index <= len(input.IndexedOptions) {
				return input.IndexedOptions[index-1]
			}
		}

		// Check if the input matches any string option. If so, return it immediately
		if input.StringOptions != nil {
			for _, input := range input.StringOptions {
				if input == answer {
					return answer
				}
			}
		}

		// Check if any CheckInput function validates the input. If so, return it immediately
		if input.EC2Helper != nil && input.Fns != nil {
			for _, fn := range input.Fns {
				if fn(input.EC2Helper, answer) {
					return answer
				}
			}
		}

		// If an arbitrary integer is allowed, try to parse the input as an integer
		if input.AcceptAnyInteger {
			_, err := strconv.Atoi(answer)
			if err == nil {
				return answer
			}
		}

		// If an arbitrary string is allowed, return the answer anyway
		if input.AcceptAnyString {
			return answer
		}

		// No match at all
		fmt.Println("Input invalid. Please try again.")
	}
}