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

/** an Access Control List */
public class Acl {

    public static class PermissionDenied extends RuntimeException {
        public PermissionDenied() { super(); }
    }

    /** an entry on an Acl; indicates permissions for a particular principal */
    public static class Entry {
        public final boolean read;
        public final boolean list;
        public final boolean write;
        public final boolean delete;
        public final boolean insert;
        public final boolean lock;
        public final boolean admin;
        public final boolean post;
        public final boolean flags;
        public final boolean mkdir;
        private String toString = null;

        public Entry(boolean read,
                     boolean list,
                     boolean insert,
                     boolean delete,
                     boolean write,
                     boolean lock,
                     boolean admin,
                     boolean post,
                     boolean flags,
                     boolean mkdir) {
            this.read = read;
            this.list = list;
            this.write = write;
            this.delete = delete;
            this.insert = insert;
            this.lock = lock;
            this.admin = admin;
            this.post = post;
            this.flags = flags;
            this.mkdir = mkdir;        
        }

        public Entry(String asString) {
            this.toString = asString;
            if (asString == null) asString = "";
            if (asString.equals("read")) asString = "rl";
            if (asString.equals("post")) asString = "rlp";
            if (asString.equals("write")) asString = "rlidwkpfm";
            this.read = asString.indexOf('r') != -1;
            this.list = asString.indexOf('l') != -1;
            this.insert = asString.indexOf('i') != -1;
            this.delete = asString.indexOf('d') != -1;
            this.write = asString.indexOf('w') != -1;
            this.lock = asString.indexOf('k') != -1;
            this.admin = asString.indexOf('a') != -1;
            this.post = asString.indexOf('p') != -1;
            this.flags = asString.indexOf('f') != -1;
            this.mkdir = asString.indexOf('m') != -1;
        }

        public String toString() {
            if (toString != null) return toString;
            StringBuffer sb = new StringBuffer();
            if (this.read) sb.append('r');
            if (this.list) sb.append('l');
            if (this.insert) sb.append('i');
            if (this.delete) sb.append('d');
            if (this.write) sb.append('w');
            if (this.lock) sb.append('k');
            if (this.admin) sb.append('a');
            if (this.post) sb.append('p');
            if (this.flags) sb.append('f');
            if (this.mkdir) sb.append('m');
            return toString = sb.toString();
        }
    }

}