Subversion Repositories general

package ak.hostadmiral.core.model;

import java.util.Collection;

import java.util.ArrayList;

import java.util.Iterator;

import java.util.Map;

import java.util.WeakHashMap;

import java.util.Comparator;

import java.util.Date;

import ak.hostadmiral.util.ConfigInit;

import ak.hostadmiral.util.CollectionInfo;

import ak.hostadmiral.util.ModelException;

import ak.hostadmiral.util.ModelSecurityException;

import ak.hostadmiral.core.model.store.UserStore;

public class UserManager

	implements

		ConfigInit,

		UserBeforeDeleteListener,

		UserDeletingListener

{

	private UserStore     store;

	private UserValidator userValidator;

	private Class[]       passwordStores;

	private Collection createdListeners      = new ArrayList();

	private Collection modifiedListeners     = new ArrayList();

	private Collection beforeDeleteListeners = new ArrayList();

	private Collection deletingListeners     = new ArrayList();

	private Collection deletedListeners      = new ArrayList();

	private Map loggedinUsers = new WeakHashMap();

	public UserManager()

		throws ModelException

	{

		addBeforeDeleteListener(this);

		addDeletingListener(this);

	}

	public User create(User editor)

		throws ModelException

	{

		if(!allowedToCreate(editor)) throw new ModelSecurityException();

		User user = new User();

		if(!user.mayChangeBoss(editor)) // ordinal user can create only own "subusers"

			user.setBoss(editor);

        setUserPasswordStores(user);

		return user;

	}

	public boolean allowedToCreate(User editor)

		throws ModelException

	{

		return User.allowedToCreate(this, editor);

	}

	public User get(User editor, Long id)

		throws ModelException

	{

		User user = store.get(id);

		if(!user.viewableBy(editor))

			throw new ModelSecurityException();

		return user;

	}

	public boolean loginExists(User editor, User user, String login)

		throws ModelException

	{

		return store.loginExists(user, login);

	}

	public User findForLogin(User editor, String login)

		throws ModelException

	{

		User user = store.findForLogin(login);

		if(user != null && !user.viewableBy(editor))

			throw new ModelSecurityException();

		return user;

	}

	public void save(User editor, User user)

		throws ModelException

	{

		if(!user.editableBy(editor) && !user.partEditableBy(editor)

			&& !user.mayChangeSuperuser(editor))

		{

			throw new ModelSecurityException();

        }

		if(userValidator != null)

			userValidator.validateUser(editor, user);

        boolean isNew = user.isNew();

		//user.setModUser(editor); // FIXME: disabled because hb throws exception

		                           // if user edits itself

		store.save(user);

		// update user if he is logged in

		for(Iterator i = loggedinUsers.keySet().iterator(); i.hasNext(); ) {

			User u = (User)i.next();

			if(u.equals(user))

				u.update(user);

		}

        // inform listeners

        if(isNew) {

        	for(Iterator i = createdListeners.iterator(); i.hasNext(); ) {

        		UserCreatedListener listener = (UserCreatedListener)i.next();

    			listener.userCreated(editor, user);

        	}

        }

        else {

            User oldUser = user.getOrigin();

            if(oldUser == null) oldUser = user;

        	for(Iterator i = modifiedListeners.iterator(); i.hasNext(); ) {

        		UserModifiedListener listener = (UserModifiedListener)i.next();

    			listener.userModified(editor, user, oldUser);

        	}

        }

        // reset backup

        user.resetOrigin();

	}

    public void addCreatedListener(UserCreatedListener listener)

    {

    	createdListeners.add(listener);

    }

    public void removeCreatedListener(UserCreatedListener listener)

    {

    	createdListeners.remove(listener);

    }

    public void addModifiedListener(UserModifiedListener listener)

    {

    	modifiedListeners.add(listener);

    }

    public void removeModifiedListener(UserModifiedListener listener)

    {

    	modifiedListeners.remove(listener);

    }

    public void addBeforeDeleteListener(UserBeforeDeleteListener listener)

    {

    	beforeDeleteListeners.add(listener);

    }

    public void removeBeforeDeleteListener(UserBeforeDeleteListener listener)

    {

    	beforeDeleteListeners.remove(listener);

    }

    public void addDeletedListener(UserDeletedListener listener)

    {

    	deletedListeners.add(listener);

    }

    public void removeDeletedListener(UserDeletedListener listener)

    {

    	deletedListeners.remove(listener);

    }

    public void addDeletingListener(UserDeletingListener listener)

    {

    	deletingListeners.add(listener);

    }

    public void removeDeletingListener(UserDeletingListener listener)

    {

    	deletingListeners.remove(listener);

    }

    public Collection beforeDelete(User editor, User user, Collection known)

		throws ModelException

    {

    	Collection cascade = new ArrayList();

    	for(Iterator i = beforeDeleteListeners.iterator(); i.hasNext(); ) {

    		UserBeforeDeleteListener listener = (UserBeforeDeleteListener)i.next();

			Collection subcascade = listener.userBeforeDelete(editor, user, known);

    		if(subcascade != null)

    			cascade.addAll(subcascade);

    	}

    	return cascade;

    }

	public void delete(User editor, User user)

		throws ModelException

	{

	    // check rights

		if(!user.deleteableBy(editor))

			throw new ModelSecurityException();

        // inform deleting listeners

    	for(Iterator i = deletingListeners.iterator(); i.hasNext(); ) {

    		UserDeletingListener listener = (UserDeletingListener)i.next();

			listener.userDeleting(editor, user);

    	}

        // backup copy

        User oldUser = new User(user);

        // delete it

		store.delete(user);

        // inform delete listeners

    	for(Iterator i = deletedListeners.iterator(); i.hasNext(); ) {

    		UserDeletedListener listener = (UserDeletedListener)i.next();

			listener.userDeleted(editor, oldUser);

    	}

	}

	public Collection listUsers(User editor)

		throws ModelException

	{

		return listUsers(null, 0, 0, null, editor);

	}

	public Collection listUsers(CollectionInfo info, int rowsPerPage, int pageNumber,

			Integer[] sortingKeys, User editor)

		throws ModelException

	{

		if(editor.isSuperuser())

			return store.listAllUsers(info, rowsPerPage, pageNumber, sortingKeys);

		else

			return store.listUsers(info, rowsPerPage, pageNumber, sortingKeys, editor);

	}

	public boolean areUsersAvailable(User editor)

		throws ModelException

	{

		return true;

	}

	public User loginUser(String login, String password, String ip)

		throws ModelException

	{

		User      user      = (login == null || password == null)

			? null : store.findForLogin(login);

		boolean   success   = (user == null) ? false : user.checkPassword(password);

		UserLogin userLogin = new UserLogin(user, login, new Date(), Boolean.valueOf(success), ip);

		// save login information

		store.saveUserLogin(userLogin);

		if(success) {

			user = new User(user);   // unbind the user from store

			loggedinUsers.put(user, Boolean.TRUE);

			return user;

		}

		else {

			return null; // wrong login or password

		}

	}

	public Collection listFailedLogins(User editor)

		throws ModelException

	{

		if(!editor.mayViewAllLogins())

			throw new ModelSecurityException();

		return store.listFailedLogins();

	}

	public Collection userBeforeDelete(User editor, User user, Collection known)

		throws ModelException

	{

        Collection subusers = store.listSubusers(user);

    	Collection cascade = new ArrayList();

		for(Iterator i = subusers.iterator(); i.hasNext(); ) {

			User u = (User)i.next();

            if(u.viewableBy(editor)) {

				if(u.deleteableBy(editor))

					cascade.add(new CascadeDeleteElement(u, CascadeDeleteElement.DELETE,

						this.beforeDelete(editor, u, known)));

				else

					cascade.add(new CascadeDeleteElement(u, CascadeDeleteElement.FORBIDDEN, null));

			}

			else {

				cascade.add(new CascadeDeleteElement(User.createLimitedCopy(u),

					CascadeDeleteElement.FORBIDDEN, null));

			}

		}

    	return cascade;

	}

	public void userDeleting(User editor, User user)

		throws ModelException

	{

        Collection subusers = store.listSubusers(user);

		for(Iterator i = subusers.iterator(); i.hasNext(); ) {

			delete(editor, (User)i.next());

		}

	}

	protected void setUserPasswordStores(User user)

		throws ModelException

	{

		if(passwordStores == null) return;

        try {

			for(int i = 0; i < passwordStores.length; i++)

				user.addPasswordStore((PasswordStore)passwordStores[i].newInstance());

        }

        catch(Exception ex) {

        	throw new ModelException(ex);

        }

	}

	public static final Integer SORT_LOGIN = new Integer(1);

	public static final Comparator LOGIN_COMPARATOR = new LoginComparator();

	public static final Comparator LOGINS_TIME_COMPARATOR = new LoginsTimeComparator();

	private static class LoginComparator

		implements Comparator

	{

		public int compare(Object o1, Object o2)

		{

			if(!(o1 instanceof User) || !(o2 instanceof User))

				throw new ClassCastException("not a User");

		    User a1 = (User)o1;

		    User a2 = (User)o2;

		    if(a1 == null && a2 == null)

		    	return 0;

		    else if(a1 == null && a2 != null)

		    	return -1;

		    else if(a1 != null && a2 == null)

		    	return 1;

		    else

		    	return a1.getLogin().compareToIgnoreCase(a2.getLogin());

		}

		public boolean equals(Object obj)

		{

			return (obj instanceof LoginComparator);

		}

	}

	private static class LoginsTimeComparator

		implements Comparator

	{

		public int compare(Object o1, Object o2)

		{

			if(!(o1 instanceof UserLogin) || !(o2 instanceof UserLogin))

				throw new ClassCastException("not a UserLogin");

		    UserLogin a1 = (UserLogin)o1;

		    UserLogin a2 = (UserLogin)o2;

		    if(a1 == null && a2 == null)

		    	return 0;

		    else if(a1 == null && a2 != null)

		    	return -1;

		    else if(a1 != null && a2 == null)

		    	return 1;

		    else

		    	return a1.getLoginTime().compareTo(a2.getLoginTime());

		}

		public boolean equals(Object obj)

		{

			return (obj instanceof LoginComparator);

		}

	}

	public void init(Map params)

		throws ModelException

	{

		try {

    		userManager = this;

			Class c = Class.forName(((String[])params.get("store"))[0]);

			store = (UserStore)c.newInstance();

			String[] userValidatorName = (String[])params.get("userValidator");

			if(userValidatorName != null) {

				Class c2 = Class.forName(userValidatorName[0]);

				userValidator = (UserValidator)c2.newInstance();

			}

			String[] passwordStoreNames = (String[])params.get("passwordStore");

			if(passwordStoreNames != null) {

				passwordStores = new Class[passwordStoreNames.length];

				for(int i = 0; i < passwordStoreNames.length; i++) {

					passwordStores[i] = Class.forName(passwordStoreNames[i]);

				}

			}

        }

        catch(Exception ex) {

        	throw new ModelException(ex);

        }

	}

	private static UserManager userManager = null;

	public static UserManager getInstance()

	{

		return userManager;

	}

}