/********************************************************************************************************************************
* Licensed Materials - Property of IBM                                                                                          *
*                                                                                                                               *
* IBM Cognos Products: AGS                                                                                                      *
*                                                                                                                               *
* (C) Copyright IBM Corp. 2005, 2009                                                                                            *
*                                                                                                                               *
* US Government Users Restricted Rights - Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp. *
*********************************************************************************************************************************/

// -----------------------------------------------------------------------------
//
// --- Deletion candidate --- 
	//this hangs on to the current candidate for deletion
//
// -----------------------------------------------------------------------------
var DIALOG_FRAME_ID = "dialogIFrame";
var DISPLAY_NONE = "none";



function DeletionCandidateManager(){
	this.current_candidate;	
	this.candidate_type;
}

//return the object behind the id
DeletionCandidateManager.prototype.getCandidateObject = function(){
	var candidate;
	
	if(this.getCandidate()){
		candidate = agsFormUtils.getElementByIdOrName(this.getCandidate());
	}
	
	return candidate;
}

//return the id
DeletionCandidateManager.prototype.getCandidate = function(){
	return this.current_candidate;
}

DeletionCandidateManager.prototype.clearCandidate = function(){
	this.current_candidate = undefined;
	this.candidate_type = undefined;
}

/*
 * set the candidate for deletion
 * candidate - the candidate object
 * type      - the candidate type, defined in constants.js. This is optional, when not
 * present the K_sControlCandidate is assigned
 *     K_sFunctionCandidate - the candidate is a valid JS function
 *     K_sControlCandidate - the candidate refers to an element
 */
DeletionCandidateManager.prototype.setCandidate = function(candidate,type){

    if (arguments.length==2 && type != 'undefined') {
        this.candidate_type = type;
    }
    else {
        this.candidate_type = K_sControlCandidate;
    }

	this.current_candidate = candidate;
}

/*
 * Perform a delete. The deleted item will depending on the context.
 * The items in order of deletion are:
 * 1. selected text in the message frame 
 * 2. selected query items/parameters/aggregations/calculations in the agent items tree
 * 3. selected attachments/links in the email task page
 * 4. agent tasks
 *
 * Note that for an item to be deleted it must not only be selected but also focused. This relates to tree nodes and selected text in input controls
 */
DeletionCandidateManager.prototype.deleteSelectedItem = function() {
    
    if(applicationActionManager.isBlocked()){
    	return;
    }
    
    //can delete text in the message frame or popup dialogs
    if(!this.deleteSelectedText()) {
        
        //do not delete tree items or agent tasks when a popup is displayed
        if (parent.popUpIsOpen()==false) {
            if (!this.deleteSelectedTreeItems()) {
                if (!this.deleteSelectedAttachmentsOrLinks()) {
                    this.deleteSelectedAction();
                }
            }
        }
    }
    
    this.clearCandidate();
}

/*
 * Delete any selected text in an active control
 * return a boolean, true if the item was deleted  
 */
DeletionCandidateManager.prototype.deleteSelectedText = function() {
    
    var success = false;
    
    var msgFrame = getMessageIFrame();
    
    //check if the delete text function has been overridden
    if (msgFrame.deleteSelectedText) {
       msgFrame.deleteSelectedText(); 
       return true;
    }
    
    //get the selection control
    var control = getSelectionControl();    
    
    if (control) {
        //get the selection object from the controls document
        //this needs to be done because in some case e.g. the HTML email body
        //the control contains a document itself and therefore has its own
        //selection object
        sel = getSelectionObject(control.ownerDocument);
        
        //check that some text has been selected
        if (isValidSelection(sel)) {
            clearSelectionText(sel);
            if (cf.browserCheck.isIE5Up()) {
                control.setActive();
            }
    	    success = true;	              
    	}
    }    
    
    return success;
}

/*
 * Delete selected agent items, parameters, calculations or aggregations from the agent items tree
 * return a boolean, true if the item was deleted 
 */
DeletionCandidateManager.prototype.deleteSelectedTreeItems = function() {
    
    var success = false;    
    
    var control = this.getCandidate();
    var candidateObject = this.getCandidateObject();
    //Check if we have a deletion candidate and make sure
    //That it is not an element object. Tree candidate are 
    //actual function calls and we need to eval them.
    //Check the candidate type, see Trakker bug 512301.0 - Get object error when attempting to delete an attachment/link
    if (this.candidate_type==K_sFunctionCandidate && control != null && (!candidateObject || candidateObject == "undefined")) {
        eval(control);
        success = true;     
    }
    
    return success;    
}

/*
 * Delete selected email attachments or links from the 'Specify the email to send' dialog
 * return a boolean, true if the item was deleted 
 */
DeletionCandidateManager.prototype.deleteSelectedAttachmentsOrLinks = function() {

    var success = false;        
    var msgFrame = getMessageIFrame();  

    if (msgFrame.deleteLinksAndAttachments != null) {
    	
        success = msgFrame.deleteLinksAndAttachments();
    }

    //If success is true it means we have some links or attachments
    //selected and they need to be deleted.
    /*if (success) {
        //the email dialog will take care of removing the items, we just
        //need to resubmit the form
        msgFrame.pform.submit();
    }*/

    return success;        
}

/*
 * Delete the selected agent task, ignore condition or schedule tasks
 * return a boolean, true if the item was deleted 
 */
DeletionCandidateManager.prototype.deleteSelectedAction = function(){
    
    var success = false;
    var msgFrame = getMessageIFrame();
    var msgDoc = getFrameDocument(msgFrame);
    
    var intended = /AgentTask-condition|AgentTask-schedule/;
    
    var candidate = this.getCandidateObject();
    
    //do not try and delete the condition or schedule
    if (candidate && candidate.value && candidate.name && candidate.name == "tabSelectedID" && !intended.test(candidate.value)) {
		
	    //block until page is reloaded
    	    cf.applicationActionManager.blockActions();
    	    
    	    if(msgFrame.leavingDialog){
    	    	//we are leaving this dialog for good.... unless you undo
    	    	msgFrame.leavingDialog();
    	    }
	    
	    msgDoc.pform.agentItemOp.value = 'remove';
	    msgDoc.pform.ps_nav_op.value = "maintain";
	    success = true;
	    msgDoc.pform.submit();
	}
	
	return success;
}

var deletionCandidateManager = new DeletionCandidateManager();