/*

	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;

			}

		}

	};

}