Application.java

package net.sourcewalker.svnnotify;

import java.util.List;

import net.sourcewalker.svnnotify.data.NullNotifier;
import net.sourcewalker.svnnotify.data.ShellProvider;
import net.sourcewalker.svnnotify.data.interfaces.IDatabase;
import net.sourcewalker.svnnotify.data.interfaces.INotifier;
import net.sourcewalker.svnnotify.data.interfaces.IObjectFactory;
import net.sourcewalker.svnnotify.data.interfaces.IProvider;
import net.sourcewalker.svnnotify.data.interfaces.IRepository;
import net.sourcewalker.svnnotify.data.interfaces.IRevision;
import net.sourcewalker.svnnotify.data.xmldb.XmlDatabase;

/**
 * @author Xperimental
 * 
 */
public class Application implements Runnable {

	/**
	 * Entry point for application start.
	 * 
	 * @param args
	 *            Command-line parameters.
	 */
	public static void main(String[] args) {
		Application app = new Application(args);
		app.run();
	}

	IDatabase database;
	IObjectFactory objectFactory;
	IProvider provider;
	INotifier notifier;

	ApplicationMode mode = ApplicationMode.NORMAL;
	String repoName = null;
	String repoUrl = null;

	public Application(String[] args) {
		database = new XmlDatabase("database.xml");
		objectFactory = (IObjectFactory) database;
		provider = new ShellProvider();
		notifier = new NullNotifier();

		parseArgs(args);
	}

	/**
	 * @param args
	 */
	private void parseArgs(String[] args) {
		for (int i = 0; i < args.length; i++) {
			String arg = args[i];
			if (arg.equalsIgnoreCase("--help")) {
				mode = ApplicationMode.HELP;
				return;
			}
			if (arg.equalsIgnoreCase("--create")) {
				mode = ApplicationMode.CREATE_REPO;
				continue;
			}
			if (arg.equalsIgnoreCase("--delete")) {
				mode = ApplicationMode.DELETE_REPO;
				continue;
			}
			if (arg.equalsIgnoreCase("--list")) {
				mode = ApplicationMode.LIST_REPO;
				return;
			}
			if (arg.equalsIgnoreCase("--name")) {
				repoName = args[i + 1];
				continue;
			}
			if (arg.equalsIgnoreCase("--url")) {
				repoUrl = args[i + 1];
				continue;
			}
		}
	}

	@Override
	public void run() {
		switch (mode) {
		case NORMAL:
			normalRun();
			break;
		case HELP:
			showHelpScreen();
			break;
		case LIST_REPO:
			listRepos();
			break;
		default:
			System.out.println("Error: Application mode not defined!");
		}
	}

	private void listRepos() {
		System.out.println("Configured repositories:");
		List<IRepository> repos = database.getRepositories();
		for (IRepository repo: repos) {
			System.out.println(repo.getName());
			System.out.println("  URL: " + repo.getURL().toString());
			System.out.println();
		}
	}

	private void showHelpScreen() {
		System.out.println("usage:");
		System.out.println("\tsvn-notify");
		System.out.println("\tsvn-notify --help");
		System.out.println("\tsvn-notify --list");
		System.out.println("\tsvn-notify --create --name <name> --url <url>");
		System.out.println("\tsvn-notify --delete --name <name>\n");
		System.out.println("Running svn-notify without parameters will check the" +
				" repositories for new revisions and alert the user," +
				" if there are any.\n");
		System.out.println("Running svn-notify with the \"--help\" parameter" +
				" will show this message.\n");
		System.out.println("The parameter \"--list\" causes svn-notify to print" +
				" out all the repositories it is configured to monitor.\n");
		System.out.println("The parameters \"--create\" and \"--delete\" are" +
				" used to create and delete repositories for monitoring.");
	}

	private void normalRun() {
		System.out.println("Check for new revisions:");
		for (IRepository repo : database.getRepositories()) {
			System.out.println("Checking repository " + repo.getName());
			List<IRevision> newRevisions = provider.getNewRevisions(
					objectFactory, repo);
			System.out.println("\tGot " + newRevisions.size()
					+ " revisions from server.");
			if (newRevisions.size() > 0) {
				List<IRevision> notifyRevisions = repo
						.updateRepository(newRevisions);
				if (notifyRevisions.size() > 0) {
					System.out.println("\t" + notifyRevisions.size()
							+ " revisions left for notify!");
					notifier.reportUpdates(repo, notifyRevisions);
				} else
					System.out.println("\tNo revisions to notify user about!");
				System.out.println();
			}
		}
		database.save();
	}

}