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package {
import flash.net.FileReference;
internal class FileItem
{
private static var file_id_sequence:Number = 0; // tracks the file id sequence
private var postObject:Object;
public var file_reference:FileReference;
public var id:String;
public var index:Number = -1;
public var file_status:int = 0;
private var js_object:Object;
public static var FILE_STATUS_QUEUED:int = -1;
public static var FILE_STATUS_IN_PROGRESS:int = -2;
public static var FILE_STATUS_ERROR:int = -3;
public static var FILE_STATUS_SUCCESS:int = -4;
public static var FILE_STATUS_CANCELLED:int = -5;
public static var FILE_STATUS_NEW:int = -6; // This file status should never be sent to JavaScript
public function FileItem(file_reference:FileReference, control_id:String, index:Number)
{
this.postObject = {};
this.file_reference = file_reference;
this.id = control_id + "_" + (FileItem.file_id_sequence++);
this.file_status = FileItem.FILE_STATUS_NEW;
this.index = index;
this.js_object = {
id: this.id,
index: this.index,
post: this.GetPostObject()
};
// Cleanly attempt to retrieve the FileReference info
// this can fail and so is wrapped in try..catch
try {
this.js_object.name = this.file_reference.name;
this.js_object.size = this.file_reference.size;
this.js_object.type = this.file_reference.type || "";
this.js_object.creationdate = this.file_reference.creationDate || new Date(0);
this.js_object.modificationdate = this.file_reference.modificationDate || new Date(0);
} catch (ex:Error) {
this.file_status = FileItem.FILE_STATUS_ERROR;
}
this.js_object.filestatus = this.file_status;
}
public function AddParam(name:String, value:String):void {
this.postObject[name] = value;
}
public function RemoveParam(name:String):void {
delete this.postObject[name];
}
public function GetPostObject(escape:Boolean = false):Object {
if (escape) {
var escapedPostObject:Object = { };
for (var k:String in this.postObject) {
if (this.postObject.hasOwnProperty(k)) {
var escapedName:String = FileItem.EscapeParamName(k);
escapedPostObject[escapedName] = this.postObject[k];
}
}
return escapedPostObject;
} else {
return this.postObject;
}
}
// Create the simply file object that is passed to the browser
public function ToJavaScriptObject():Object {
this.js_object.filestatus = this.file_status;
this.js_object.post = this.GetPostObject(true);
return this.js_object;
}
public function toString():String {
return "FileItem - ID: " + this.id;
}
/*
// The purpose of this function is to escape the property names so when Flash
// passes them back to javascript they can be interpretted correctly.
// ***They have to be unescaped again by JavaScript.**
//
// This works around a bug where Flash sends objects this way:
// object.parametername = "value";
// instead of
// object["parametername"] = "value";
// This can be a problem if the parameter name has characters that are not
// allowed in JavaScript identifiers:
// object.parameter.name! = "value";
// does not work but,
// object["parameter.name!"] = "value";
// would have worked.
*/
public static function EscapeParamName(name:String):String {
name = name.replace(/[^a-z0-9_]/gi, FileItem.EscapeCharacter);
name = name.replace(/^[0-9]/, FileItem.EscapeCharacter);
return name;
}
public static function EscapeCharacter():String {
return "$" + ("0000" + arguments[0].charCodeAt(0).toString(16)).substr(-4, 4);
}
}
}
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