// Copyright 2007 the Contributors, as shown in the revision logs.
// Licensed under the Apache Public Source License 2.0 ("the License").
// You may not use this file except in compliance with the License.

package org.ibex.mail;
import org.ibex.mail.*;
import org.ibex.util.*;
import org.ibex.mail.*;
import org.ibex.js.*;
import java.io.*;
import java.net.*;
import java.util.*;
import java.text.*;

/** a node on the "mailbox tree" */
public interface MailTree {

    public MailTree     slash(String name, boolean create);
    public String[]     children();
    public void         rmdir(String subdir);
    public void         rename(String subdir, MailTree newParent, String newName);
    public Mailbox      getMailbox();

    public static class Wrapper implements MailTree {
        protected MailTree mt;
        public Wrapper(MailTree mt) { this.mt = mt; }
        public MailTree     slash(String name, boolean create) { return mt.slash(name, create); }
        public String[]     children() { return mt.children(); }
        public void         rmdir(String subdir) { mt.rmdir(subdir); }
        public void         rename(String subdir, MailTree newParent, String newName) { mt.rename(subdir, newParent, newName); }
        public Mailbox      getMailbox() { return mt.getMailbox(); }
    }

    /** applies an Acl to a directory; requires directions on how to Acl-ize subdirectories */
    public static abstract class AclWrapper extends Wrapper {
        protected Acl.Entry acl;
        public AclWrapper(MailTree mt, Acl.Entry acl) { super(mt); this.acl = acl; }
        public Mailbox getMailbox() { return new Mailbox.AclWrapper(mt.getMailbox(), acl); }
        public void rmdir(String subdir) {
            if (!acl.delete) throw new Acl.PermissionDenied();
            super.rmdir(subdir);
        }
        public void rename(String subdir, MailTree newParent, String newName) {
            if (!acl.delete) throw new Acl.PermissionDenied();
            super.rename(subdir, newParent, newName);
        }
        public abstract MailTree slash(String name, boolean create);
    }

    /** applies the Acl recursively to the entire subtree */
    public static class RecursiveAclWrapper extends AclWrapper {
        public RecursiveAclWrapper(MailTree mt, Acl.Entry acl) { super(mt, acl); }
        public MailTree slash(String name, boolean create) {
            if (!acl.list) throw new Acl.PermissionDenied();
            if (!acl.mkdir) create = false;
            return new RecursiveAclWrapper(mt.slash(name, create), acl);
        }
    }
}