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/**
* @for Connect
*/
(function() {
var YCM = YAHOO.util.Connect, _fn = {};
/**
* @description This method creates and instantiates the Flash transport.
* @method _swf
* @private
* @static
* @param {string} URI to connection.swf.
* @return {void}
*/
function _swf(uri) {
var o = '<object id="YUIConnectionSwf" type="application/x-shockwave-flash" data="' +
uri + '" width="0" height="0">' +
'<param name="movie" value="' + uri + '">' +
'<param name="allowScriptAccess" value="always">' +
'</object>',
c = document.createElement('div');
document.body.appendChild(c);
c.innerHTML = o;
}
/**
* @description This method calls the public method on the
* Flash transport to start the XDR transaction. It is analogous
* to Connection Manager's asyncRequest method.
* @method xdr
* @private
* @static
* @param {object} The transaction object.
* @param {string} HTTP request method.
* @param {string} URI for the transaction.
* @param {object} The transaction's callback object.
* @param {object} The JSON object used as HTTP POST data.
* @return {void}
*/
function _xdr(o, m, u, c, d) {
_fn[parseInt(o.tId)] = { 'o':o, 'c':c };
if (d) {
c.method = m;
c.data = d;
}
o.conn.send(u, c, o.tId);
}
/**
* @description This method instantiates the Flash transport and
* establishes a static reference to it, used for all XDR requests.
* @method transport
* @public
* @static
* @param {string} URI to connection.swf.
* @return {void}
*/
function _init(uri) {
_swf(uri);
YCM._transport = document.getElementById('YUIConnectionSwf');
}
function _xdrReady() {
YCM.xdrReadyEvent.fire();
}
/**
* @description This method fires the global and transaction start
* events.
* @method _xdrStart
* @private
* @static
* @param {object} The transaction object.
* @param {string} The transaction's callback object.
* @return {void}
*/
function _xdrStart(o, cb) {
if (o) {
// Fire global custom event -- startEvent
YCM.startEvent.fire(o, cb.argument);
if(o.startEvent){
// Fire transaction custom event -- startEvent
o.startEvent.fire(o, cb.argument);
}
}
}
/**
* @description This method is the initial response handler
* for XDR transactions. The Flash transport calls this
* function and sends the response payload.
* @method handleXdrResponse
* @private
* @static
* @param {object} The response object sent from the Flash transport.
* @return {void}
*/
function _handleXdrResponse(r) {
var o = _fn[r.tId].o,
cb = _fn[r.tId].c;
if (r.statusText === 'xdr:start') {
_xdrStart(o, cb);
return;
}
r.responseText = decodeURI(r.responseText);
o.r = r;
if (cb.argument) {
o.r.argument = cb.argument;
}
this.handleTransactionResponse(o, cb, r.statusText === 'xdr:abort' ? true : false);
delete _fn[r.tId];
}
// Bind the functions to Connection Manager as static fields.
YCM.xdr = _xdr;
YCM.swf = _swf;
YCM.transport = _init;
YCM.xdrReadyEvent = new YAHOO.util.CustomEvent('xdrReady');
YCM.xdrReady = _xdrReady;
YCM.handleXdrResponse = _handleXdrResponse;
})();