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.Comparator;

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.SystemUserStore;

public class SystemUserManager

	implements

		ConfigInit,

		UserBeforeDeleteListener,

		UserDeletingListener

{

	private SystemUserStore store;

	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();

	public SystemUserManager()

		throws ModelException

	{

		UserManager.getInstance().addBeforeDeleteListener(this);

	}

	public SystemUser create(User editor)

		throws ModelException

	{

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

		return new SystemUser();

	}

	public boolean allowedToCreate(User editor)

		throws ModelException

	{

		return SystemUser.allowedToCreate(this, editor);

	}

	public SystemUser get(User editor, Long id)

		throws ModelException

	{

		SystemUser user = store.get(id);

		if(!user.viewableBy(editor))

			throw new ModelSecurityException();

		return user;

	}

	public boolean nameExists(User editor, SystemUser user, String name)

		throws ModelException

	{

		return store.nameExists(user, name);

	}

	public boolean uidExists(User editor, SystemUser user, Integer uid)

		throws ModelException

	{

		return store.uidExists(user, uid);

	}

	public SystemUser findForName(User editor, String name)

		throws ModelException

	{

		SystemUser user = store.findForName(name);

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

			throw new ModelSecurityException();

		return user;

	}

	public SystemUser findForUid(User editor, Integer uid)

		throws ModelException

	{

		SystemUser user = store.findForUid(uid);

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

			throw new ModelSecurityException();

		return user;

	}

	public void save(User editor, SystemUser systemUser)

		throws ModelException

	{

		if(!systemUser.editableBy(editor))

			throw new ModelSecurityException();

        boolean isNew = systemUser.isNew();

		//systemUser.setModUser(editor);  // FIXME

		store.save(systemUser);

        // inform listeners

        if(isNew) {

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

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

    			listener.systemUserCreated(editor, systemUser);

        	}

        }

        else {

            SystemUser oldSystemUser = systemUser.getOrigin();

            if(oldSystemUser == null) oldSystemUser = systemUser;

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

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

    			listener.systemUserModified(editor, systemUser, oldSystemUser);

        	}

        }

        // reset backup

        systemUser.resetOrigin();

	}

    public void addCreatedListener(SystemUserCreatedListener listener)

    {

    	createdListeners.add(listener);

    }

    public void removeCreatedListener(SystemUserCreatedListener listener)

    {

    	createdListeners.remove(listener);

    }

    public void addModifiedListener(SystemUserModifiedListener listener)

    {

    	modifiedListeners.add(listener);

    }

    public void removeModifiedListener(SystemUserModifiedListener listener)

    {

    	modifiedListeners.remove(listener);

    }

    public void addBeforeDeleteListener(SystemUserBeforeDeleteListener listener)

    {

    	beforeDeleteListeners.add(listener);

    }

    public void removeBeforeDeleteListener(SystemUserBeforeDeleteListener listener)

    {

    	beforeDeleteListeners.remove(listener);

    }

    public void addDeletingListener(SystemUserDeletingListener listener)

    {

    	deletingListeners.add(listener);

    }

    public void removeDeletingListener(SystemUserDeletingListener listener)

    {

    	deletingListeners.remove(listener);

    }

    public void addDeletedListener(SystemUserDeletedListener listener)

    {

    	deletedListeners.add(listener);

    }

    public void removeDeletedListener(SystemUserDeletedListener listener)

    {

    	deletedListeners.remove(listener);

    }

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

		throws ModelException

    {

    	Collection cascade = new ArrayList();

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

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

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

    		if(subcascade != null)

    			cascade.addAll(subcascade);

    	}

    	return cascade;

    }

	public void delete(User editor, SystemUser systemUser)

		throws ModelException

	{

	    // check rights

		if(!systemUser.deleteableBy(editor))

			throw new ModelSecurityException();

        // inform deleting listeners

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

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

			listener.systemUserDeleting(editor, systemUser);

    	}

        // backup copy

        SystemUser oldSystemUser = new SystemUser(systemUser);

        // delete it

		store.delete(systemUser);

        // inform deleted listeners

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

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

			listener.systemUserDeleted(editor, oldSystemUser);

    	}

	}

	public Collection listSystemUsers(User editor)

		throws ModelException

	{

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

	}

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

			Integer[] sortingKeys, User editor)

		throws ModelException

	{

		if(editor.isSuperuser())

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

		else

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

	}

	public boolean areSystemUsersAvailable(User editor)

		throws ModelException

	{

		if(editor.isSuperuser())

        	return true;

        else

			return store.countSystemUsersAvailable(editor) > 0;

	}

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

		throws ModelException

	{

        Collection systemUsers = store.listOwnSystemUsers(user);

    	Collection cascade = new ArrayList();

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

			SystemUser u = (SystemUser)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(SystemUser.createLimitedCopy(u),

					CascadeDeleteElement.FORBIDDEN, null));

			}

		}

    	return cascade;

	}

	public void userDeleting(User editor, User user)

		throws ModelException

	{

        Collection systemUsers = store.listOwnSystemUsers(user);

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

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

		}

    }

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

	public static final Integer SORT_NAME = new Integer(2);

	public static final Comparator UID_COMPARATOR  = new UidComparator();

	public static final Comparator NAME_COMPARATOR = new NameComparator();

	private static class UidComparator

		implements Comparator

	{

		public int compare(Object o1, Object o2)

		{

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

				throw new ClassCastException("not a SystemUser");

		    SystemUser a1 = (SystemUser)o1;

		    SystemUser a2 = (SystemUser)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.getUid().compareTo(a2.getUid());

		}

		public boolean equals(Object obj)

		{

			return (obj instanceof UidComparator);

		}

	}

	private static class NameComparator

		implements Comparator

	{

		public int compare(Object o1, Object o2)

		{

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

				throw new ClassCastException("not a SystemUser");

		    SystemUser a1 = (SystemUser)o1;

		    SystemUser a2 = (SystemUser)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.getName().compareToIgnoreCase(a2.getName());

		}

		public boolean equals(Object obj)

		{

			return (obj instanceof NameComparator);

		}

	}

	public void init(Map params)

		throws ModelException

	{

		try {

    		systemUserManager = this;

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

			store = (SystemUserStore)c.newInstance();

        }

        catch(Exception ex) {

        	throw new ModelException(ex);

        }

	}

	private static SystemUserManager systemUserManager = null;

	public static SystemUserManager getInstance()

	{

		return systemUserManager;

	}

}