/**
 * "BOZO VALIDATOR 2" : Check if a form has been changed but not submitted when a bozo clicks
 * on a link which will result in potential data input loss
 * Tested on Firefox (XP & Mac OSX) , IE6 (XP), Safari (Mac OSX)
 * b2evolution - http://b2evolution.net/
 * @version $Id: bozo_validator.js 7905 2014-12-26 07:53:17Z yura $
 */
var bozo_confirm_mess;

var bozo = {

// array of changes for each form we need to verify (needed to detect if another form has changed when we submit)
'tab_changes' : Object(),
// Total number of changes
'nb_changes' : 0,

// If no translated message has been provided, use this default:
'confirm_mess' : bozo_confirm_mess ? bozo_confirm_mess : 'You have modified this form but you haven\'t submitted it yet.\nYou are about to lose your edits.\nAre you sure?',

/**
* BOZO VALIDATOR INITIALIZATION
* This is designed to track changes on forms whith an ID including '_checkchanges'
*/
init: function ( )
{
// Loop through all forms:
var inputs = jQuery("form")
// Initialize this form as having no changes yet:
.each( function() { bozo.tab_changes[this.id] = 0; } )
// add submit event on the form to control if there are changes on others forms:
.submit(bozo.validate_submit)
// Filter all "*_checkchanges" forms:
.filter("[id$='_checkchanges']")
// Hook "click" event for reset elements:
.find("input[type=reset]:not([class$=_nocheckchanges])").click(bozo.reset_changes).end()
// Hook "change" and "keypress" event for all others:
.find("input[type=text], input[type=password], input[type=radio], input[type=checkbox], input[type=file], input[type=hidden], textarea")
.not("[class$=_nocheckchanges]");
inputs.each( function()
{
if( jQuery( this ).hasClass( 'form_color_input' ) )
{ // Store initialized color in order to know when we should skip a counting of changed inputs:
jQuery( this ).data( 'bozo-init-color', jQuery( this ).val() );
}
} );
inputs.on("change", bozo.change)
.on("keypress", bozo.change);
},


/**
* caters for the differences between Internet Explorer and fully DOM-supporting browsers
*/
findTarget: function ( e )
{
var target;
if (window.event && window.event.srcElement)
target = window.event.srcElement;
else if (e && e.target)
target = e.target;

if (!target)
return null;

return target;
},


/*
* called when there is a change event on an element
*/
change: function( e )
{ // Get the target element
var target = bozo.findTarget( e );

if( typeof( jQuery( target ).data( 'bozo-init-color' ) ) != 'undefined' )
{ // Check if color input is really changed:
var init_color_val = jQuery( target ).data( 'bozo-init-color' ).toLowerCase();
var curr_color_val = jQuery( target ).val().toLowerCase();
var check_same_color = init_color_val.substr( 1, 3 );
if( init_color_val == curr_color_val ||
   ( ( init_color_val == '#' + check_same_color || init_color_val == '#' + check_same_color + check_same_color ) &&
     ( curr_color_val == '#' + check_same_color || curr_color_val == '#' + check_same_color + check_same_color ) ) )
{ // Skip autofixing action of colorpicker on initialization to avoid false alerts about changed inputs,
// e.g. colorpicker autofix color values on initialization from #333 to #333333 or from #F0F0F0 to #f0f0f0 and etc.
return;
}
}

// Update changes number for his parent form
bozo.tab_changes[ jQuery( target ).closest( 'form' ).attr( 'id' ) ]++;
// Update Total changes number
bozo.nb_changes++;
},


/*
* Call when there is a click on a reset input
* Reset changes
*/
reset_changes: function ( e )
{
// Loop on the forms changes array
for( i in bozo.tab_changes )
{ // Reset changes number to 0
bozo.tab_changes[i] = 0;
}
// Total changes number
bozo.nb_changes = 0;
},


/*
* Called when there is a click event on a submit button
* If there are no changes on others forms, cancel onbeforeunload event
*/
validate_submit: function( e )
{
var target = bozo.findTarget(e);

var other_form_changes = 0;

// Loop on the forms changes array
for( i in bozo.tab_changes )
{
if ( ( i != jQuery( target ).closest( 'form' ).attr( 'id' ) ) && bozo.tab_changes[i] )
{ // Another form contains input changes
other_form_changes++;
}
}

if( !other_form_changes )
{ // There are no changes on others forms, so cancel onbeforeunload event
jQuery( window ).off( 'beforeunload' );
return;
}
},



/**
* Called when the user close the window
* Ask confirmation to close page without saving changes if there have been changes on all form inputs
*/
validate_close: function( e )
{
if( bozo.nb_changes )
{ // there are input changes
if( window.event )
{ // For ie:
window.event.returnValue = bozo.confirm_mess;
}
// For all other browsers:
return bozo.confirm_mess;
}
}

}

// Init Bozo validator when the window is loaded:
jQuery( document ).ready( bozo.init );
// Note: beforeunload is a "very special" event and cannot be added with addEvent:
jQuery( window ).on( 'beforeunload', bozo.validate_close );