/*
 * Kyle Pierce
 * CSE 143
 *
 * Prompts the user for a file or directory name and shows a
 * listing of all files and directories that can be reached from
 * it (including subdirectories).
 */
import java.io.*;
import java.util.*;

public class Crawler {
   public static void main(String[] args) {
      Scanner console = new Scanner(System.in);
      System.out.print("directory or file name? ");
      String name = console.nextLine();
      File f = new File(name);
      if (!f.exists()) {
         System.out.println("That file or directory does not exist");
      } else {
         print(f);
      }
   }

   // post: prints the name of the file
   //       if the file is a directory, print its children with 
   //       indentation to show nesting
   public static void print(File f) {
      print(f, 0);
   }

   // post: print the name of the file at the given indentation level
   //       if the file is a directory, print its children at a 
   //       higher indentation indent
   private static void print(File f, int indent) {
      for (int i = 0; i < indent; i++) {
         System.out.print("    ");
      }
      System.out.println(f.getName());
      if (f.isDirectory()) {
         for (File subF : f.listFiles()) {
            print(subF, indent + 1);  
         }
      }
   }
}