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"));
                        store = (SystemUserStore)c.newInstance();
        }
        catch(Exception ex) {
                throw new ModelException(ex);
        }
        }

        private static SystemUserManager systemUserManager = null;

        public static SystemUserManager getInstance()
        {
                return systemUserManager;
        }
}