/********************************************************************************************************************************
* Licensed Materials - Property of IBM                                                                                          *
*                                                                                                                               *
* IBM Cognos Products: AGS                                                                                                      *
*                                                                                                                               *
* (C) Copyright IBM Corp. 2005, 2008                                                                                            *
*                                                                                                                               *
* US Government Users Restricted Rights - Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp. *
*********************************************************************************************************************************/

//attempt to stop people doing two things at once
//which causes all kinds of bother
function ApplicationActionManager(){
    //write to the status bar
    this.debug_flag = false;
    
    //track the http_requests
    this.http_count = 0;
    
	this.is_blocked = false;
	//the auto unblocker could get tangled on new requests
	///give it a unique id (system time)
	this.unblock_id = 0;		 	
}

//called by anything doing asynch http requests
ApplicationActionManager.prototype.httpStart = function(){
	this.http_count++;
	
	if(this.http_count >= 2){
	    this.blockActions();
	}if(this.http_count < 0){
	    //auto correction, if the calling code gets mangled
	    //this.http_count = 1;    
	}
	this.debug();
}

//called by anything doing asynch http requests
ApplicationActionManager.prototype.httpStop = function(ex){
	this.http_count--;
	
	if(this.http_count < 2){
	    this.allowActions();
	}
	
	this.debug(ex);
}

ApplicationActionManager.prototype.isBlocked = function(){
	
	return this.is_blocked;
}

ApplicationActionManager.prototype.unBlock = function(id){
	
	if(id == this.unblock_id && id != 0){
		this.unblock_id = 0;
		
		this.is_blocked = false;
		
		//if(this.debug_flag){
		    //alert(new Date().getTime() - new Date(id).getTime());
		//}
	}else{
	    //if(this.debug_flag){
		 //   alert("failed unblocker thread");
		//}
	}	
		
	this.debug();
}

ApplicationActionManager.prototype.debug = function(ex){
	
	if(this.debug_flag){
	    window.defaultStatus =  "http requests: " + this.http_count + ", " + (this.is_blocked ? "blocked" : "unblocked") + (ex ? " error: " + ex : "");       
	}
}

ApplicationActionManager.prototype.blockActions = function(){
	this.is_blocked = true;
	
	this.debug();
	
    this.unblock_id = (new Date()).getTime();
    	
   	//as a get out.... un block in 8 seconds.. why not
    setTimeout("applicationActionManager.unBlock("+this.unblock_id+")", 12000); 
	
	return this.unblock_id;
}

ApplicationActionManager.prototype.allowActions = function(){
	this.is_blocked = false;
	
	this.debug();
}

function setCursorStyle(style){
    getConfigFrame().document.body.style.cursor = style;
    getMessageIFrame().document.body.style.cursor = style;
}

function setStatus(message){
    window.defaultStatus = message;
}

//this function is passed to the dispatcher so that we keep the http count steady
function cDispatchErrorHandler(location_name, ex){
    applicationActionManager.httpStop(ex);  
}

var applicationActionManager = new ApplicationActionManager();