/*
 * Flickr Sphere (Sample of the ActionScript Thread Library)
 * 
 * Licensed under the MIT License
 * 
 * Copyright (c) 2008 BeInteractive! (www.be-interactive.org) and
 *                    Spark project  (www.libspark.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 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.
 * 
 */
package org.libspark.flickrsphere.threads.flickr
{
	import flash.net.URLRequest;
	import flash.system.LoaderContext;
	import org.libspark.flickrsphere.models.FlickrPhoto;
	import org.libspark.thread.Thread;
	import org.libspark.thread.threads.display.LoaderThread;
	
	/**
	 * LoadFlickrPhotoImagesThread クラスは、FlickPhoto のイメージを読み込んで PhotoImageQueue に追加します.
	 */
	public class LoadFlickrPhotoImagesThread extends Thread
	{
		/**
		 * @param	photos	読み込む FlickrPhoto の配列
		 * @param	queue	読み込んだイメージを格納する PhotoImageQueue
		 */
		public function LoadFlickrPhotoImagesThread(photos:Array, queue:PhotoImageQueue)
		{
			_photos = photos;
			_queue = queue;
		}
		
		private var _photos:Array;
		private var _queue:PhotoImageQueue;
		private var _loader:LoaderThread;
		
		override protected function run():void
		{
			// もう読み込む写真が無ければ終了
			if (_photos.length == 0) {
				return;
			}
			
			// 読み込む写真
			var photo:FlickrPhoto = FlickrPhoto(_photos.shift());
			
			// ロード開始
			_loader = new LoaderThread(new URLRequest(photo.smallSquareImageURL), new LoaderContext(true));
			_loader.start();
			_loader.join();
			
			// 完了したら loadComplete
			next(loadComplete);
			// 割り込まれたら loadInterrupted
			interrupted(loadInterrupted);
			// エラーが起きたら loadError
			error(Error, loadError);
		}
		
		private function loadComplete():void
		{
			// 読み込んだ写真をキューに追加
			_queue.offer(_loader.loader);
			
			// LoaderThread 破棄
			_loader = null;
			
			// 次を読み込む
			run();
		}
		
		private function loadInterrupted():void
		{
			// LoaderThread にも割り込みをかけて終了
			_loader.interrupt();
			_loader = null;
		}
		
		private function loadError(e:Error, t:Thread):void
		{
			// 写真イメージの読み込みでエラーが起きた際には無視する
			_loader = null;
			// 何事も無かったかのように次へ
			run();
		}
	}
}