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/**
* Copyright (c) 2015 Camil Staps <info@camilstaps.nl>
* See the LICENSE file for copying permission.
*/
package com.camilstaps.shop;
import java.io.InputStream;
import java.io.PrintStream;
import java.util.InputMismatchException;
import java.util.Scanner;
/**
* Command Line Interface Interaction
* @author Camil Staps, s4498062
*/
public class CLIInteraction extends UserInteraction {
private final Scanner in;
private final PrintStream out;
/**
* Default is stdin and stdout
*/
public CLIInteraction() {
this(System.in, System.out);
}
/**
* CLI interaction with custom input and outputstream
* @param is
* @param ps
*/
public CLIInteraction(InputStream is, PrintStream ps) {
in = new Scanner(is);
out = ps;
}
@Override
String getString() {
return in.nextLine();
}
@Override
public int getChoice(String question, String[] options) {
out.println(question);
int i = 1;
for (String option : options) {
out.println(" " + (i++) + " : " + option);
}
int selection = 0;
boolean read = false;
do {
if (read) {
out.println("Invalid option. Try again:");
}
try {
selection = in.nextInt();
} catch (InputMismatchException ex) {
}
in.nextLine();
read = true;
} while (selection < 1 || selection > options.length);
return selection - 1;
}
@Override
void putString(String string) {
out.print(string);
}
@Override
Command getCommand() {
putString("► ");
return new Command(getString());
}
@Override
float getFloat() {
float result = in.nextFloat();
in.nextLine();
return result;
}
@Override
boolean getBoolean() {
putString(" (yes/no) ");
String result;
do {
result = in.nextLine();
} while (!result.equalsIgnoreCase("yes") && !result.equalsIgnoreCase("no"));
return result.equalsIgnoreCase("yes");
}
}
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