package org.richfaces.json;

/*
Copyright (c) 2002 JSON.org

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

The Software shall be used for Good, not Evil.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/

import java.util.Iterator;

/**
 * Convert a web browser cookie list string to a JSONObject and back.
 * @author JSON.org
 * @version 2
 */
public class CookieList {

    /**
     * Convert a cookie list into a JSONObject. A cookie list is a sequence
     * of name/value pairs. The names are separated from the values by '='.
     * The pairs are separated by ';'. The names and the values
     * will be unescaped, possibly converting '+' and '%' sequences.
     *
     * To add a cookie to a cooklist,
     * cookielistJSONObject.put(cookieJSONObject.getString("name"),
     *     cookieJSONObject.getString("value"));
     * @param string  A cookie list string
     * @return A JSONObject
     * @throws JSONException
     */
    public static JSONObject toJSONObject(String string) throws JSONException {
        JSONObject o = new JSONObject();
        JSONTokener x = new JSONTokener(string);
        while (x.more()) {
            String name = Cookie.unescape(x.nextTo('='));
            x.next('=');
            o.put(name, Cookie.unescape(x.nextTo(';')));
            x.next();
        }
        return o;
    }


    /**
     * Convert a JSONObject into a cookie list. A cookie list is a sequence
     * of name/value pairs. The names are separated from the values by '='.
     * The pairs are separated by ';'. The characters '%', '+', '=', and ';'
     * in the names and values are replaced by "%hh".
     * @param o A JSONObject
     * @return A cookie list string
     * @throws JSONException
     */
    public static String toString(JSONObject o) throws JSONException {
        boolean      b = false;
        Iterator     keys = o.keys();
        String       s;
        StringBuffer sb = new StringBuffer();
        while (keys.hasNext()) {
            s = keys.next().toString();
            if (!o.isNull(s)) {
                if (b) {
                    sb.append(';');
                }
                sb.append(Cookie.escape(s));
                sb.append("=");
                sb.append(Cookie.escape(o.getString(s)));
                b = true;
            }
        }
        return sb.toString();
    }
}
