package com.google.gwt.user.client;

import java.util.*;

public class CookieSnapshot
{
    private final String mPrimaryCookieValue;
    private final String mRawDocCookies;
    private final HashMap<String, String> mCookies;

    public CookieSnapshot( String pPrimaryCookieName )
    {
        mPrimaryCookieValue = Cookies.getCookie( pPrimaryCookieName ); // Force update of GWT's Variables
        mRawDocCookies = Cookies.rawCookies;
        mCookies = Cookies.cachedCookies;
    }

    /**
     * Gets the Primary Cookie Value associated with the Primary Cookie Name (from construction).
     *
     * @return the primary cookie's value, or <code>null</code> if the primary cookie didn't exist
     */
    public String getPrimaryCookieValue()
    {
        return mPrimaryCookieValue;
    }

    /**
     * @return !null String which can be used to check if ANY 'visible' Cookie state has changed
     */
    public String getRawDocCookies()
    {
        return (mRawDocCookies != null) ? mRawDocCookies : "";
    }

    /**
     * Gets all the cookie names in this Snapshot.
     *
     * @return !null set of all the cookie names in this Snapshot
     */
    public Set<String> getCookieNames()
    {
        return mCookies.keySet();
    }

    /**
     * Gets the cookie value associated with the given name in this Snapshot.
     *
     * @param pName the cookie name to retrieved the value for
     *
     * @return the cookie's value, or <code>null</code> if the cookie didn't exist
     */
    public String getCookie( String pName )
    {
        return mCookies.get( pName );
    }
}