/**
 * Handles the loading of LVL files
 *
 *  Copyright (C) 2012  Mike Gerwitz
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Affero General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU Affero General Public License for more details.
 *
 *  You should have received a copy of the GNU Affero General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 *
 * Maps (the term "level" is used in the game) are stored in a fixed-width LVL
 * file.
 */


/**
 * Handles delegation of LVL data
 *
 * This acts as a Map factory, leaving all processing responsibilities to the
 * Map instance. Consequently, any custom map format would be supported,
 * provided that the appropriate Map is handling it.
 */
ltjs.MapSet = Class( 'MapSet',
{
    /**
     * Raw level set data (binary)
     * @type {string}
     */
    'private _data': '',


    /**
     * Initialize map set with LVL data and a Map constructor
     *
     * The Map constructor is used in place of a separate Map factory.
     *
     * @param  {string}    data      binary LVL data
     * @param  {ltjs.Map}  map_ctor  Map constructor
     */
    __construct: function( data, map_ctor )
    {
        this._data    = ''+( data );
        this._mapCtor = map_ctor;
    },


    /**
     * Load a level by the given number (e.g. level 1)
     *
     * @param  {number}  id  number of level to load, 1-indexed
     */
    'public getMapByNumber': function( id )
    {
        return this._mapCtor( this._data, id );
    }
} );