/*
 * RequestUtils
 * Visit http://createjs.com/ for documentation, updates and examples.
 *
 *
 * Copyright (c) 2012 gskinner.com, inc.
 *
 * 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 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.
 */

/**
 * @module PreloadJS
 */

(function () {

	/**
	 * Utilities that assist with parsing load items, and determining file types, etc.
	 * @class RequestUtils
	 */
	var s = {};

	/**
	 * Determine if a specific type should be loaded as a binary file. Currently, only images and items marked
	 * specifically as "binary" are loaded as binary. Note that audio is <b>not</b> a binary type, as we can not play
	 * back using an audio tag if it is loaded as binary. Plugins can change the item type to binary to ensure they get
	 * a binary result to work with. Binary files are loaded using XHR2. Types are defined as static constants on
	 * {{#crossLink "AbstractLoader"}}{{/crossLink}}.
	 * @method isBinary
	 * @param {String} type The item type.
	 * @return {Boolean} If the specified type is binary.
	 * @static
	 */
	s.isBinary = function (type) {
		switch (type) {
			case createjs.Types.IMAGE:
			case createjs.Types.BINARY:
				return true;
			default:
				return false;
		}
	};

	/**
	 * Determine if a specific type is a text-based asset, and should be loaded as UTF-8.
	 * @method isText
	 * @param {String} type The item type.
	 * @return {Boolean} If the specified type is text.
	 * @static
	 */
	s.isText = function (type) {
		switch (type) {
			case createjs.Types.TEXT:
			case createjs.Types.JSON:
			case createjs.Types.MANIFEST:
			case createjs.Types.XML:
			case createjs.Types.CSS:
			case createjs.Types.SVG:
			case createjs.Types.JAVASCRIPT:
			case createjs.Types.SPRITESHEET:
				return true;
			default:
				return false;
		}
	};

	/**
	 * Determine the type of the object using common extensions. Note that the type can be passed in with the load item
	 * if it is an unusual extension.
	 * @method getTypeByExtension
	 * @param {String} extension The file extension to use to determine the load type.
	 * @return {String} The determined load type (for example, `createjs.Types.IMAGE`). Will return `null` if
	 * the type can not be determined by the extension.
	 * @static
	 */
	s.getTypeByExtension = function (extension) {
		if (extension == null) {
			return createjs.Types.TEXT;
		}

		switch (extension.toLowerCase()) {
			case "jpeg":
			case "jpg":
			case "gif":
			case "png":
			case "webp":
			case "bmp":
				return createjs.Types.IMAGE;
			case "ogg":
			case "mp3":
			case "webm":
				return createjs.Types.SOUND;
			case "mp4":
			case "webm":
			case "ts":
				return createjs.Types.VIDEO;
			case "json":
				return createjs.Types.JSON;
			case "xml":
				return createjs.Types.XML;
			case "css":
				return createjs.Types.CSS;
			case "js":
				return createjs.Types.JAVASCRIPT;
			case 'svg':
				return createjs.Types.SVG;
			default:
				return createjs.Types.TEXT;
		}
	};

	createjs.RequestUtils = s;

}());