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/*
YUI 3.17.2 (build 9c3c78e)
Copyright 2014 Yahoo! Inc. All rights reserved.
Licensed under the BSD License.
http://yuilibrary.com/license/
*/

YUI.add('file-flash', function (Y, NAME) {

/**
     * The FileFlash class provides a wrapper for a file pointer stored in Flash. The File wrapper
     * also implements the mechanics for uploading a file and tracking its progress.
     * @module file-flash
     */
    /**
     * The class provides a wrapper for a file pointer in Flash.
     * @class FileFlash
     * @extends Base
     * @constructor
     * @param {Object} config Configuration object.
     */

var FileFlash = function(o) {
        FileFlash.superclass.constructor.apply(this, arguments);
    };

Y.extend(FileFlash, Y.Base, {

/**
        * Construction logic executed during FileFlash instantiation.
        *
        * @method initializer
        * @protected
        */
        initializer : function (cfg) {
            if (!this.get("id")) {
                this._set("id", Y.guid("file"));
            }
        },

/**
        * Handler of events dispatched by the Flash player.
        *
        * @method _swfEventHandler
        * @param {Event} event The event object received from the Flash player.
        * @protected
        */
        _swfEventHandler: function (event) {
          if (event.id === this.get("id")) {
          switch (event.type) {
            /**
             * Signals that this file's upload has started.
             *
             * @event uploadstart
             * @param event {Event} The event object for the `uploadstart` with the
             *                      following payload:
             *  <dl>
             *      <dt>uploader</dt>
             *          <dd>The Y.SWF instance of Flash uploader that's handling the upload.</dd>
             *  </dl>
             */
            case "uploadstart":
                 this.fire("uploadstart", {uploader: this.get("uploader")});
                 break;
            case "uploadprogress":

/**
                   * Signals that progress has been made on the upload of this file.
                   *
                   * @event uploadprogress
                   * @param event {Event} The event object for the `uploadprogress` with the
                   *                      following payload:
                   *  <dl>
                   *      <dt>originEvent</dt>
                   *          <dd>The original event fired by the Flash uploader instance.</dd>
                   *      <dt>bytesLoaded</dt>
                   *          <dd>The number of bytes of the file that has been uploaded.</dd>
                   *      <dt>bytesTotal</dt>
                   *          <dd>The total number of bytes in the file (the file size)</dd>
                   *      <dt>percentLoaded</dt>
                   *          <dd>The fraction of the file that has been uploaded, out of 100.</dd>
                   *  </dl>
                   */
                 this.fire("uploadprogress", {originEvent: event,
                                              bytesLoaded: event.bytesLoaded,
                                              bytesTotal: event.bytesTotal,
                                              percentLoaded: Math.min(100, Math.round(10000*event.bytesLoaded/event.bytesTotal)/100)
                                             });
                 this._set("bytesUploaded", event.bytesLoaded);
                 break;
            case "uploadcomplete":

/**
                   * Signals that this file's upload has completed, but data has not yet been received from the server.
                   *
                   * @event uploadfinished
                   * @param event {Event} The event object for the `uploadfinished` with the
                   *                      following payload:
                   *  <dl>
                   *      <dt>originEvent</dt>
                   *          <dd>The original event fired by the Flash player instance.</dd>
                   *  </dl>
                   */
                 this.fire("uploadfinished", {originEvent: event});
                 break;
            case "uploadcompletedata":
                /**
                 * Signals that this file's upload has completed and data has been received from the server.
                 *
                 * @event uploadcomplete
                 * @param event {Event} The event object for the `uploadcomplete` with the
                 *                      following payload:
                 *  <dl>
                 *      <dt>originEvent</dt>
                 *          <dd>The original event fired by the Flash player instance.</dd>
                 *      <dt>data</dt>
                 *          <dd>The data returned by the server.</dd>
                 *  </dl>
                 */
                 this.fire("uploadcomplete", {originEvent: event,
                                              data: event.data});
                 break;
            case "uploadcancel":

/**
                 * Signals that this file's upload has been cancelled.
                 *
                 * @event uploadcancel
                 * @param event {Event} The event object for the `uploadcancel` with the
                 *                      following payload:
                 *  <dl>
                 *      <dt>originEvent</dt>
                 *          <dd>The original event fired by the Flash player instance.</dd>
                 *  </dl>
                 */
                 this.fire("uploadcancel", {originEvent: event});
                 break;
            case "uploaderror":

/**
                 * Signals that this file's upload has encountered an error.
                 *
                 * @event uploaderror
                 * @param event {Event} The event object for the `uploaderror` with the
                 *                      following payload:
                 *  <dl>
                 *      <dt>originEvent</dt>
                 *          <dd>The original event fired by the Flash player instance.</dd>
                 *      <dt>status</dt>
                 *          <dd>The status code reported by the Flash Player. If it's an HTTP error,
                 *                then this corresponds to the HTTP status code received by the uploader.</dd>
                 *      <dt>statusText</dt>
                 *          <dd>The text of the error event reported by the Flash Player.</dd>
                 *      <dt>source</dt>
                 *          <dd>Either "http" (if it's an HTTP error), or "io" (if it's a network transmission
                 *              error.)</dd>
                 *  </dl>
                 */
                 this.fire("uploaderror", {originEvent: event, status: event.status, statusText: event.message, source: event.source});

}
        }
        },

/**
        * Starts the upload of a specific file.
        *
        * @method startUpload
        * @param url {String} The URL to upload the file to.
        * @param parameters {Object} (optional) A set of key-value pairs to send as variables along with the file upload HTTP request.
        * @param fileFieldName {String} (optional) The name of the POST variable that should contain the uploaded file ('Filedata' by default)
        */
        startUpload: function(url, parameters, fileFieldName) {

if (this.get("uploader")) {

var myUploader = this.get("uploader"),
                fileField = fileFieldName || "Filedata",
                id = this.get("id"),
                params = parameters || null;

this._set("bytesUploaded", 0);

myUploader.on("uploadstart", this._swfEventHandler, this);
            myUploader.on("uploadprogress", this._swfEventHandler, this);
            myUploader.on("uploadcomplete", this._swfEventHandler, this);
            myUploader.on("uploadcompletedata", this._swfEventHandler, this);
            myUploader.on("uploaderror", this._swfEventHandler, this);

myUploader.callSWF("upload", [id, url, params, fileField]);
         }

/**
        * Cancels the upload of a specific file, if currently in progress.
        *
        * @method cancelUpload
        */
        cancelUpload: function () {
         if (this.get("uploader")) {
           this.get("uploader").callSWF("cancel", [this.get("id")]);
           this.fire("uploadcancel");
         }
        }

}, {

/**
        * The identity of the class.
        *
        * @property NAME
        * @type String
        * @default 'file'
        * @readOnly
        * @protected
        * @static
        */
        NAME: 'file',

/**
        * The type of transport.
        *
        * @property TYPE
        * @type String
        * @default 'flash'
        * @readOnly
        * @protected
        * @static
        */
        TYPE: "flash",

/**
        * Static property used to define the default attribute configuration of
        * the File.
        *
        * @property ATTRS
        * @type {Object}
        * @protected
        * @static
        */
        ATTRS: {

/**
        * A String containing the unique id of the file wrapped by the FileFlash instance.
        * The id is supplied by the Flash player uploader.
        *
        * @attribute id
        * @type {String}
        * @initOnly
        */
        id: {
            writeOnce: "initOnly",
            value: null
        },

/**
        * The size of the file wrapped by FileFlash. This value is supplied by the Flash player uploader.
        *
        * @attribute size
        * @type {Number}
        * @initOnly
        */
        size: {
            writeOnce: "initOnly",
            value: 0
        },

/**
        * The name of the file wrapped by FileFlash. This value is supplied by the Flash player uploader.
        *
        * @attribute name
        * @type {String}
        * @initOnly
        */
        name: {
            writeOnce: "initOnly",
            value: null
        },

/**
        * The date that the file wrapped by FileFlash was created on. This value is supplied by the Flash player uploader.
        *
        * @attribute dateCreated
        * @type {Date}
        * @initOnly
        */
        dateCreated: {
            writeOnce: "initOnly",
            value: null
        },

/**
        * The date that the file wrapped by FileFlash was last modified on. This value is supplied by the Flash player uploader.
        *
        * @attribute dateModified
        * @type {Date}
        * @initOnly
        */
        dateModified: {
            writeOnce: "initOnly",
            value: null
        },

/**
        * The number of bytes of the file that has been uploaded to the server. This value is
        * non-zero only while a file is being uploaded.
        *
        * @attribute bytesUploaded
        * @type {Date}
        * @readOnly
        */
        bytesUploaded: {
            readOnly: true,
            value: 0
        },

/**
        * The type of the file wrapped by FileFlash. This value is provided by the Flash player
        * uploader.
        *
        * @attribute type
        * @type {String}
        * @initOnly
        */
        type: {
            writeOnce: "initOnly",
            value: null
        },

/**
        * The instance of Y.SWF wrapping the Flash player uploader associated with this file.
        *
        * @attribute uploder
        * @type {SWF}
        * @initOnly
        */
        uploader: {
            writeOnce: "initOnly",
            value: null
        }
        }
    });

Y.FileFlash = FileFlash;

}, '3.17.2', {"requires": ["base"]});