// Copyright 2000-2005 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 static org.ibex.mail.MailException.*;
import org.ibex.crypto.*;
import org.ibex.util.*;
import org.ibex.mail.protocol.*;
import org.ibex.io.*;
import org.ibex.js.*;
import java.util.*;
import java.net.*;
import java.io.*;

// multipart/mixed       -- default
// multipart/parallel    -- order of components does not matter
// multipart/alternative -- same data, different versions
// multipart/digest      -- default content-type of components is message/rfc822
// message/rfc822        -- FIXME
// message/partial       -- not supported; see RFC 2046, section 5.2.2
// message/external-body -- not supported; see RFC 2046, section 5.2.3
// FIXME charsets  US-ASCII, ISO-8559-X, 
public class ContentType extends org.ibex.js.JSReflection {
    public final String    type;
    public final String    subtype;
    public final String    description;
    public final String    id;
    public final String    transferEncoding;
    public final String    charset;
    public final boolean   composite;
    public final boolean   alternative;
    public final Hash      parameters = new Hash();
    public ContentType(String header, String description, String id, String transferEncoding) {
        this.id = id;
        this.description = description;
        this.transferEncoding = transferEncoding;
        if (header == null) { type="text"; subtype="plain"; charset="us-ascii"; alternative=false; composite=false; return; }
        header = header.trim();
        if (header.indexOf('/') == -1) {
            Log.warn(this, "content-type lacks a forward slash: \""+header+"\"");
            header = "text/plain";
        }
        type = header.substring(0, header.indexOf('/')).toLowerCase();
        header = header.substring(header.indexOf('/') + 1);
        subtype = (header.indexOf(';') == -1) ? header.toLowerCase() : header.substring(0, header.indexOf(';')).toLowerCase();
        composite   = type != null && (type.equals("message") || type.equals("multipart"));
        alternative = composite && subtype.equals("alternative");
        charset     = parameters.get("charset") == null ? "us-ascii" : parameters.get("charset").toString();
        if (header.indexOf(';') == -1) return;
        StringTokenizer st = new StringTokenizer(header.substring(header.indexOf(';') + 1), ";");
        while(st.hasMoreTokens()) {
            String key = st.nextToken().trim();
            if (key.indexOf('=') == -1)
                throw new Malformed("content-type parameter lacks an equals sign: \""+key+"\"");
            String val = key.substring(key.indexOf('=')+1).trim();
            if (val.startsWith("\"") && val.endsWith("\"")) val = val.substring(1, val.length() - 2);
            key = key.substring(0, key.indexOf('=')+1).toLowerCase();
            parameters.put(key, val);
        }
    }
}