/*
 * Copyright 2005 - 2009  Zarafa B.V.
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License, version 3, 
 * as published by the Free Software Foundation with the following additional 
 * term according to sec. 7:
 *  
 * According to sec. 7 of the GNU Affero General Public License, version
 * 3, the terms of the AGPL are supplemented with the following terms:
 * 
 * "Zarafa" is a registered trademark of Zarafa B.V. The licensing of
 * the Program under the AGPL does not imply a trademark license.
 * Therefore any rights, title and interest in our trademarks remain
 * entirely with us.
 * 
 * However, if you propagate an unmodified version of the Program you are
 * allowed to use the term "Zarafa" to indicate that you distribute the
 * Program. Furthermore you may use our trademarks where it is necessary
 * to indicate the intended purpose of a product or service provided you
 * use it in accordance with honest practices in industrial or commercial
 * matters.  If you want to propagate modified versions of the Program
 * under the name "Zarafa" or "Zarafa Server", you may only do so if you
 * have a written permission by Zarafa B.V. (to acquire a permission
 * please contact Zarafa at trademark@zarafa.com).
 * 
 * The interactive user interface of the software displays an attribution
 * notice containing the term "Zarafa" and/or the logo of Zarafa.
 * Interactive user interfaces of unmodified and modified versions must
 * display Appropriate Legal Notices according to sec. 5 of the GNU
 * Affero General Public License, version 3, when you propagate
 * unmodified or modified versions of the Program. In accordance with
 * sec. 7 b) of the GNU Affero General Public License, version 3, these
 * Appropriate Legal Notices must retain the logo of Zarafa or display
 * the words "Initial Development by Zarafa" if the display of the logo
 * is not reasonably feasible for technical reasons. The use of the logo
 * of Zarafa in Legal Notices is allowed for unmodified and modified
 * versions of the software.
 * 
 * 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/>.
 * 
 */

/*
	Queue Plug-in
	
	Features:
		*Adds a cancelQueue() method for cancelling the entire queue.
		*All queued files are uploaded when startUpload() is called.
		*If false is returned from uploadComplete then the queue upload is stopped.
		 If false is not returned (strict comparison) then the queue upload is continued.
		*Adds a QueueComplete event that is fired when all the queued files have finished uploading.
		 Set the event handler with the queue_complete_handler setting.
		
	*/

var SWFUpload;
if (typeof(SWFUpload) === "function") {
	SWFUpload.queue = {};
	
	SWFUpload.prototype.initSettings = (function (oldInitSettings) {
		return function () {
			if (typeof(oldInitSettings) === "function") {
				oldInitSettings.call(this);
			}
			
			this.queueSettings = {};
			
			this.queueSettings.queue_cancelled_flag = false;
			this.queueSettings.queue_upload_count = 0;
			
			this.queueSettings.user_upload_complete_handler = this.settings.upload_complete_handler;
			this.queueSettings.user_upload_start_handler = this.settings.upload_start_handler;
			this.settings.upload_complete_handler = SWFUpload.queue.uploadCompleteHandler;
			this.settings.upload_start_handler = SWFUpload.queue.uploadStartHandler;
			
			this.settings.queue_complete_handler = this.settings.queue_complete_handler || null;
		};
	})(SWFUpload.prototype.initSettings);

	SWFUpload.prototype.startUpload = function (fileID) {
		this.queueSettings.queue_cancelled_flag = false;
		this.callFlash("StartUpload", [fileID]);
	};

	SWFUpload.prototype.cancelQueue = function () {
		this.queueSettings.queue_cancelled_flag = true;
		this.stopUpload();
		
		var stats = this.getStats();
		while (stats.files_queued > 0) {
			this.cancelUpload();
			stats = this.getStats();
		}
	};
	
	SWFUpload.queue.uploadStartHandler = function (file) {
		var returnValue;
		if (typeof(this.queueSettings.user_upload_start_handler) === "function") {
			returnValue = this.queueSettings.user_upload_start_handler.call(this, file);
		}
		
		// To prevent upload a real "FALSE" value must be returned, otherwise default to a real "TRUE" value.
		returnValue = (returnValue === false) ? false : true;
		
		this.queueSettings.queue_cancelled_flag = !returnValue;

		return returnValue;
	};
	
	SWFUpload.queue.uploadCompleteHandler = function (file) {
		var user_upload_complete_handler = this.queueSettings.user_upload_complete_handler;
		var continueUpload;
		
		if (file.filestatus === SWFUpload.FILE_STATUS.COMPLETE) {
			this.queueSettings.queue_upload_count++;
		}

		if (typeof(user_upload_complete_handler) === "function") {
			continueUpload = (user_upload_complete_handler.call(this, file) === false) ? false : true;
		} else if (file.filestatus === SWFUpload.FILE_STATUS.QUEUED) {
			// If the file was stopped and re-queued don't restart the upload
			continueUpload = false;
		} else {
			continueUpload = true;
		}
		
		if (continueUpload) {
			var stats = this.getStats();
			if (stats.files_queued > 0 && this.queueSettings.queue_cancelled_flag === false) {
				this.startUpload();
			} else if (this.queueSettings.queue_cancelled_flag === false) {
				this.queueEvent("queue_complete_handler", [this.queueSettings.queue_upload_count]);
				this.queueSettings.queue_upload_count = 0;
			} else {
				this.queueSettings.queue_cancelled_flag = false;
				this.queueSettings.queue_upload_count = 0;
			}
		}
	};
}