org.mvnsearch.boot.xtermjs.commands.SystemCommands Maven / Gradle / Ivy

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package org.mvnsearch.boot.xtermjs.commands;

import org.apache.commons.io.FilenameUtils;
import org.springframework.shell.standard.ShellComponent;
import org.springframework.shell.standard.ShellMethod;
import org.springframework.shell.standard.ShellOption;
import reactor.core.publisher.Mono;

import java.io.File;
import java.text.SimpleDateFormat;
import java.util.Date;

/**
 * System Commands
 *
 * @author linux_china
 */
@ShellComponent
public class SystemCommands implements CommandsSupport {

	@ShellMethod("Date command")
	public String date() {
		SimpleDateFormat dateFormat = new SimpleDateFormat("EEE, d MMM yyyy HH:mm:ss z");
		return dateFormat.format(new Date());
	}

	@ShellMethod("cd command")
	public Mono cd(@ShellOption(help = "path name", defaultValue = "") String path) throws Exception {
		return Mono.deferWithContext(context -> {
			String currentDir = context.get("path");
			File dest;
			if (path.isEmpty()) {
				dest = new File(System.getProperty("user.home", "."));
			}
			else if (path.startsWith("/")) {
				dest = new File(path);
			}
			else {
				dest = new File(new File(currentDir), path);
			}
			String absolutePath = FilenameUtils.normalize(dest.getAbsolutePath());
			if (!dest.exists()) {
				return Mono.error(new Exception("Directory not existed: " + absolutePath));
			}
			else if (!dest.isDirectory()) {
				return Mono.error(new Exception("Not directory: " + absolutePath));
			}
			else {
				context.put("path", absolutePath);
				return Mono.just("$path:" + absolutePath);
			}
		});
	}

}