// ----------------------------------------------
// File:		flashCommBridge.js
// Author:		Nathan Derksen
// Description:	Wrapper class for sending Flash data through the Flash LocalConnection object.
// Example:
// ----------------------------------------------


// ----------------------------------------------
// Function:	FlashAPI()
// Author:		Nathan Derksen
// Description:	Base class
// Inputs:		<String> id: The ID for the tag to hold the Flash content
// Returns:		<Nothing>
// ----------------------------------------------
function FlashCommBridge()
{
	this.pInstance = null;
	this.pShimHandle = null;
	this.pConnectionName = "";
}

// ----------------------------------------------
// Function:	FlashCommBridge.getInstance()
// Author:		Nathan Derksen
// Description:	Singleton access method
// Inputs:		<none>
// Returns:		<FlashCommBridge> Handle to a single ProductModel instance
// ----------------------------------------------
FlashCommBridge.getInstance = function()
{
	if (!this.pInstance)
	{
		this.pInstance = new FlashCommBridge();
	}
	return this.pInstance;
};

// ----------------------------------------------
// Function:	setAttribute()
// Author:		Nathan Derksen
// Description:	Sets the various attributes to be used within the <object> and <embed> tags. 
//				Certain attributes will automatically be put within certain tags (such as width 
//				and height in the <object> and <embed> tags and flashvars in the <param> and <embed> tags.
// Inputs:		<String> attName: The attribute name to set
//				<String> attValue: Value to give the specified attribute
// Returns:		<Nothing>
// ----------------------------------------------
FlashCommBridge.prototype.send = function(methodName, methodData)
{
    if (this.pShimHandle == null)
    {
        this.createShimContainer();
    }
    var flashShim = new FlashAPI(document.getElementById("flashCommBridgeContainer"));
    flashShim.setAttribute("src", "/shared/flash/flashCommBridge.swf");
    flashShim.setAttribute("width", "300");
    flashShim.setAttribute("height", "20");
    flashShim.setAttribute("wmode", "transparent");
    flashShim.setAttribute("flashVars", "methodName=" + escape(methodName) + "&methodData=" + escape(methodData) + "&connectionName=" + this.requestConnectionName());
    flashShim.setFlashVersion(8, 0, 0);
    flashShim.generateFlash();
   	flashShim.triggerBlur();
};

FlashCommBridge.prototype.requestConnectionName = function()
{
	if (this.pConnectionName == "")
	{
		this.pConnectionName = "comm" + Math.random().toString();
	}
	return this.pConnectionName;
}

FlashCommBridge.prototype.createShimContainer = function()
{
	if (document.getElementById("flashCommBridgeContainer") == null)
	{
		var debugDiv = document.createElement("div");
		debugDiv.setAttribute("id", "flashCommBridgeContainer");
		debugDiv.style.left = "10px";
		debugDiv.style.top = "10px";
		debugDiv.style.width = "300px";
		debugDiv.style.height = "20px";
		debugDiv.style.position = "absolute";
		document.body.appendChild(debugDiv);
	}
}