práctica 3, falta la última parte

2026-07-01 15:27:21 +02:00 · 2026-03-04 20:27:45 +01:00
commit aa8b7b30fb
21 changed files with 2705 additions and 0 deletions
--- a/es/um/redes/nanoFiles/shell/NFShell.java
+++ b/es/um/redes/nanoFiles/shell/NFShell.java
@@ -0,0 +1,174 @@
+package es.um.redes.nanoFiles.shell;
+
+import java.util.Scanner;
+import java.util.StringTokenizer;
+import java.util.Vector;
+
+import es.um.redes.nanoFiles.application.NanoFiles;
+
+public class NFShell {
+	/**
+	 * Scanner para leer comandos de usuario de la entrada estándar
+	 */
+	private Scanner reader;
+
+	byte command = NFCommands.COM_INVALID;
+	String[] commandArgs = new String[0];
+
+	boolean enableComSocketIn = false;
+	private boolean skipValidateArgs;
+
+	/*
+	 * Testing-related: print command to stdout (when reading commands from stdin)
+	 */
+	public static final String FILENAME_TEST_SHELL = ".nanofiles-test-shell";
+	public static boolean enableVerboseShell = false;
+
+	public NFShell() {
+		reader = new Scanner(System.in);
+
+		System.out.println("NanoFiles shell");
+		System.out.println("For help, type 'help'");
+	}
+
+	// devuelve el comando introducido por el usuario
+	public byte getCommand() {
+		return command;
+	}
+
+	// Devuelve los parámetros proporcionados por el usuario para el comando actual
+	public String[] getCommandArguments() {
+		return commandArgs;
+	}
+
+	// Espera hasta obtener un comando válido entre los comandos existentes
+	public void readGeneralCommand() {
+		boolean validArgs;
+		do {
+			commandArgs = readGeneralCommandFromStdIn();
+			// si el comando tiene parámetros hay que validarlos
+			validArgs = validateCommandArguments(commandArgs);
+		} while (!validArgs);
+	}
+
+	public String chooseDirectory(String defaultDirectory) {
+		char response;
+		String directory = null;
+		do {
+			System.out.print(
+					"Do you want to use '" + defaultDirectory + "' as location of the directory server? (y/n): ");
+			String input = reader.nextLine().trim().toLowerCase();
+			if (input.length() == 1) { // Verificar que la entrada es un solo carácter
+				response = input.charAt(0);
+				if (response == 'y') {
+					directory = defaultDirectory;
+				} else if (response == 'n') {
+					System.out.print("Enter the directory hostname/IP:");
+					directory = reader.nextLine().trim().toLowerCase();
+				} else {
+					System.out.println("Invalid key! Please, answer 'y' or 'n'.");
+				}
+			}
+		} while (directory == null);
+		System.out.println("Using directory location: " + directory);
+		return directory;
+	}
+
+	// Usa la entrada estándar para leer comandos y procesarlos
+	private String[] readGeneralCommandFromStdIn() {
+		String[] args = new String[0];
+		Vector<String> vargs = new Vector<String>();
+		while (true) {
+			System.out.print("(nanoFiles@" + NanoFiles.sharedDirname + ") ");
+			// obtenemos la línea tecleada por el usuario
+			String input = reader.nextLine();
+			StringTokenizer st = new StringTokenizer(input);
+			// si no hay ni comando entonces volvemos a empezar
+			if (st.hasMoreTokens() == false) {
+				continue;
+			}
+			// traducimos la cadena del usuario en el código de comando correspondiente
+			command = NFCommands.stringToCommand(st.nextToken());
+			if (enableVerboseShell) {
+				System.out.println(input);
+			}
+			skipValidateArgs = false;
+			// Dependiendo del comando...
+			switch (command) {
+			case NFCommands.COM_INVALID:
+				// El comando no es válido
+				System.out.println("Invalid command");
+				continue;
+			case NFCommands.COM_HELP:
+				// Mostramos la ayuda
+				NFCommands.printCommandsHelp();
+				continue;
+			case NFCommands.COM_QUIT:
+			case NFCommands.COM_FILELIST_DIR:
+			case NFCommands.COM_MYFILES:
+			case NFCommands.COM_SERVE:
+			case NFCommands.COM_PEERLIST:
+			case NFCommands.COM_PING:
+				// Estos comandos son válidos sin parámetros
+				break;
+			case NFCommands.COM_FILELIST_PEER:
+			case NFCommands.COM_DOWNLOAD_DIR:
+			case NFCommands.COM_DOWNLOAD_PEER:
+			case NFCommands.COM_NICK:
+				// Estos requieren parámetros
+				while (st.hasMoreTokens()) {
+					vargs.add(st.nextToken());
+				}
+				break;
+			default:
+				skipValidateArgs = true;
+				System.out.println("Invalid command");
+				;
+			}
+			break;
+		}
+		return vargs.toArray(args);
+	}
+
+	// Algunos comandos requieren un parámetro
+	// Este método comprueba si se proporciona parámetro para los comandos
+	private boolean validateCommandArguments(String[] args) {
+		if (skipValidateArgs)
+			return false;
+		switch (this.command) {
+		case NFCommands.COM_DOWNLOAD_DIR:
+			if (args.length != 1) {
+				System.out.println(
+						"Correct use:" + NFCommands.commandToString(command) + " <hash_substring>");
+				return false;
+			}
+			break;
+		case NFCommands.COM_DOWNLOAD_PEER:
+			if (args.length != 2) {
+				System.out.println("Correct use:" + NFCommands.commandToString(command)
+						+ " <peer_nickname> <hash_substring>");
+				return false;
+			}
+			break;
+		case NFCommands.COM_FILELIST_PEER:
+			if (args.length != 1) {
+				System.out.println("Correct use:" + NFCommands.commandToString(command) + " <peer_nickname>");
+				return false;
+			}
+			break;
+		case NFCommands.COM_NICK:
+			if (args.length != 1) {
+				System.out.println("Correct use:" + NFCommands.commandToString(command) + " <new_nickname>");
+				return false;
+			}
+			break;
+		default:
+		}
+		// El resto no requieren parámetro
+		return true;
+	}
+
+	public static void enableVerboseShell() {
+		enableVerboseShell = true;
+	}
+}