Subversion Repositories general

package ak.hostadmiral.core.model;

import java.util.*;
import net.sf.hibernate.*;
import net.sf.hibernate.type.Type;
import ak.hostadmiral.util.HibernateUtil;
import ak.hostadmiral.util.ModelException;
import ak.hostadmiral.util.ModelSecurityException;

public class MailAliasManager
        implements UserBeforeDeleteListener
{
        private static MailAliasManager mailAliasManager = null;
        private static boolean registered = false;

        public static MailAliasManager getInstance()
        {
                if(mailAliasManager == null)
                        mailAliasManager = new MailAliasManager();

                return mailAliasManager;
        }

        protected static void register()
        {
                synchronized(MailAliasManager.class) {
                        if(registered) return;

                        registered = true;
                        try {
                                HibernateUtil.getConfiguration().addResource(
                                        "ak/hostadmiral/core/model/MailAlias.hbm.xml");
                        }
                        catch(Exception ex) {
                                ex.printStackTrace();
                                throw new RuntimeException(ex.getMessage());
                        }
                }
        }

        static {
                register();
        }

        private Collection createdListeners      = new ArrayList();
        private Collection modifiedListeners     = new ArrayList();
        private Collection beforeDeleteListeners = new ArrayList();
        private Collection deletedListeners      = new ArrayList();

        private MailAliasManager()
        {
                UserManager.getInstance().addBeforeDeleteListener(this);
        }

        public MailAlias create(User editor)
                throws ModelException
        {
                if(!allowedToCreate(editor)) throw new ModelSecurityException();

                MailAlias alias = new MailAlias();
                alias.setDestinations(new ArrayList());
                return alias;
        }

        public boolean allowedToCreate(User editor)
                throws ModelException
        {
                return MailAlias.allowedToCreate(this, editor);
        }

        public MailAlias get(User editor, Long id)
                throws ModelException
        {
                MailAlias alias;

                try {
                        alias = (MailAlias)HibernateUtil.currentSession().load(MailAlias.class, id);
                }
                catch(HibernateException ex)
                {
                        throw new ModelException(ex);
                }

                if(!alias.viewableBy(editor))
                        throw new ModelSecurityException();

                return alias;
        }

        public boolean addressExists(User editor, MailAlias alias, String address)
                throws ModelException
        {
                if(alias.getDomain() == null)
                        throw new ModelException("Cannot check unique address for mail alias without domain");

                try {
                        if(alias.getId() == null)
                                return ((Integer)HibernateUtil.currentSession().iterate(
                                        "select count(*) from MailAlias where address = ? and domain = ?",
                                        new Object[] { address, alias.getDomain() },
                                        new Type[] { Hibernate.STRING, Hibernate.entity(InetDomain.class) } )
                                        .next()).intValue() > 0;
                        else
                                return ((Integer)HibernateUtil.currentSession().iterate(
                                        "select count(*) from MailAlias a where address = ? and domain = ? and a != ?",
                                        new Object[] { address, alias.getDomain(), alias },
                                        new Type[] { Hibernate.STRING, Hibernate.entity(InetDomain.class),
                                                Hibernate.entity(MailAlias.class) } )
                                        .next()).intValue() > 0;
                }
                catch(HibernateException ex)
                {
                        throw new ModelException(ex);
                }
        }

        protected MailAlias findForName(String name)
                throws ModelException
        {
                try {
                        List list = HibernateUtil.currentSession().find(
                                "from MailAlias where name=?", name, Hibernate.STRING);

                        if(list.size() == 0)
                                return null;
                        else
                                return (MailAlias)list.get(0);
                }
                catch(HibernateException ex)
                {
                        throw new ModelException(ex);
                }
        }

        public void save(User editor, MailAlias mailAlias)
                throws ModelException
        {
                if(!mailAlias.editableBy(editor))
                        throw new ModelSecurityException();

        boolean isNew = mailAlias.isNew();

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

                try {
                        HibernateUtil.currentSession().saveOrUpdate(mailAlias);
                }
                catch(HibernateException ex)
                {
                        throw new ModelException(ex);
                }

        // inform listeners
        if(isNew) {
                for(Iterator i = createdListeners.iterator(); i.hasNext(); ) {
                        MailAliasCreatedListener listener = (MailAliasCreatedListener)i.next();
                        listener.mailAliasCreated(editor, mailAlias);
                }
        }
        else {
            MailAlias oldMailAlias = mailAlias.getOrigin();
            if(oldMailAlias == null) oldMailAlias = mailAlias;
                for(Iterator i = modifiedListeners.iterator(); i.hasNext(); ) {
                        MailAliasModifiedListener listener = (MailAliasModifiedListener)i.next();
                        listener.mailAliasModified(editor, mailAlias, oldMailAlias);
                }
        }
        }

    public void addCreatedListener(MailAliasCreatedListener listener)
    {
        createdListeners.add(listener);
    }

    public void removeCreatedListener(MailAliasCreatedListener listener)
    {
        createdListeners.remove(listener);
    }

    public void addModifiedListener(MailAliasModifiedListener listener)
    {
        modifiedListeners.add(listener);
    }

    public void removeModifiedListener(MailAliasModifiedListener listener)
    {
        modifiedListeners.remove(listener);
    }

    public void addBeforeDeleteListener(MailAliasBeforeDeleteListener listener)
    {
        beforeDeleteListeners.add(listener);
    }

    public void removeBeforeDeleteListener(MailAliasBeforeDeleteListener listener)
    {
        beforeDeleteListeners.remove(listener);
    }

    public void addDeletedListener(MailAliasDeletedListener listener)
    {
        deletedListeners.add(listener);
    }

    public void removeDeletedListener(MailAliasDeletedListener listener)
    {
        deletedListeners.remove(listener);
    }

    public Collection beforeDelete(User editor, MailAlias mailAlias, Collection known)
                throws ModelException
    {
        Collection cascade = new ArrayList();

        for(Iterator i = beforeDeleteListeners.iterator(); i.hasNext(); ) {
                MailAliasBeforeDeleteListener listener = (MailAliasBeforeDeleteListener)i.next();
                        Collection subcascade = listener.mailAliasBeforeDelete(editor, mailAlias, known);
                if(subcascade != null)
                        cascade.addAll(subcascade);
        }

        return cascade;
    }

        public void delete(User editor, MailAlias mailAlias)
                throws ModelException
        {
            // check rights
                if(!mailAlias.deleteableBy(editor))
                        throw new ModelSecurityException();

        // backup copy
        MailAlias oldMailAlias = new MailAlias(mailAlias);

        // delete it
                try {
                        HibernateUtil.currentSession().delete(mailAlias);
                }
                catch(HibernateException ex)
                {
                        throw new ModelException(ex);
                }

        // inform listeners
        for(Iterator i = deletedListeners.iterator(); i.hasNext(); ) {
                MailAliasDeletedListener listener = (MailAliasDeletedListener)i.next();
                        listener.mailAliasDeleted(editor, oldMailAlias);
        }
        }

        public Collection listMailAliases(User editor)
                throws ModelException
        {
                try {
                        if(editor.isSuperuser())
                                return HibernateUtil.currentSession().find("from MailAlias");
                        else
                                return HibernateUtil.currentSession().find(
                                        "select a from MailAlias a left join a.domain as d"
                                        + " where d.owner=? or a.owner=?",
                                        new Object[] { editor, editor },
                                        new Type[] { Hibernate.entity(User.class), Hibernate.entity(User.class) } );
                }
                catch(HibernateException ex)
                {
                        throw new ModelException(ex);
                }
        }

        public boolean areMailAliasesAvailable(User editor)
                throws ModelException
        {
                try {
                        if(editor.isSuperuser()
                                || InetDomainManager.getInstance().areInetDomainsAvailable(editor))
                        {
                                return true;
                        }
                        else {
                                return ((Integer)HibernateUtil.currentSession().iterate(
                                        "select count(*) from MailAlias a left join a.domain as d"
                                        + " where d.owner=? or a.owner=?",
                                        new Object[] { editor, editor },
                                        new Type[] { Hibernate.entity(User.class), Hibernate.entity(User.class) })
                                        .next()).intValue() > 0;
                        }
                }
                catch(HibernateException ex)
                {
                        throw new ModelException(ex);
                }
        }

        public Collection userBeforeDelete(User editor, User user, Collection known)
                throws ModelException
        {
        Collection mailAliases;

                try {
                        mailAliases = HibernateUtil.currentSession().find(
                                "from MailAlias where owner = ?",
                                user, Hibernate.entity(User.class) );
                }
                catch(HibernateException ex)
                {
                        throw new ModelException(ex);
                }

                return iterateBeforeDelete(editor, mailAliases, known);
    }

        private Collection iterateBeforeDelete(User editor, Collection mailAliases, Collection known)
                throws ModelException
        {
        Collection cascade = new ArrayList();
                for(Iterator i = mailAliases.iterator(); i.hasNext(); ) {
                        MailAlias mailAlias = (MailAlias)i.next();
            if(mailAlias.viewableBy(editor)) {
                                if(mailAlias.deleteableBy(editor))
                                        cascade.add(new CascadeDeleteElement(mailAlias, CascadeDeleteElement.DELETE,
                                                this.beforeDelete(editor, mailAlias, known)));
                                else
                                        cascade.add(new CascadeDeleteElement(mailAlias, CascadeDeleteElement.FORBIDDEN,
                                                null));
                        }
                        else {
                                cascade.add(new CascadeDeleteElement(MailAlias.createLimitedCopy(mailAlias),
                                        CascadeDeleteElement.FORBIDDEN, null));
                        }
                }

        return cascade;
        }

        public static final Comparator ADDRESS_COMPARATOR = new AddressComparator();

        private static class AddressComparator
                implements Comparator
        {
                public int compare(Object o1, Object o2)
                {
                        if(!(o1 instanceof MailAlias) || !(o2 instanceof MailAlias))
                                throw new ClassCastException("not a MailAlias");

                    MailAlias a1 = (MailAlias)o1;
                    MailAlias a2 = (MailAlias)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.getAddress().compareToIgnoreCase(a2.getAddress());
                }

                public boolean equals(Object obj)
                {
                        return (obj instanceof AddressComparator);
                }
        }
}