/*
Turn Visual Composer Image Carousel into Visual Composer Infinite Image Carousel
Include before the  tag on yout theme's header.php 
Read the detailed step-by-step at https://humbertosilva.com/visual-composer-infinite-image-carousel/
*/

// auxiliary code to create triggers for the add and remove class for later use
(function($){
$.each(["addClass","removeClass"],function(i,methodname){
    var oldmethod = $.fn[methodname];
    $.fn[methodname] = function(){
          oldmethod.apply( this, arguments );
          this.trigger(methodname+"change");
          return this;
    }
});
})(jQuery);

// main function for the infinite loop
function vc_custominfiniteloop_init(vc_cil_element_id){

  var vc_element = '#' + vc_cil_element_id; // because we're using this more than once let's create a variable for it
  window.maxItens = jQuery(vc_element).data('per-view'); // max visible items defined
  window.addedItens = 0; // auxiliary counter for added itens to the end 

  // go to slides and duplicate them to the end to fill space
  jQuery(vc_element).find('.vc_carousel-slideline-inner').find('.vc_item').each(function(){
    // we only need to duplicate the first visible images
    if (window.addedItens < window.maxItens) {
      if (window.addedItens == 0 ) {
        // the fisrt added slide will need a trigger so we know it ended and make it "restart" without animation
        jQuery(this).clone().addClass('vc_custominfiniteloop_restart').removeClass('vc_active').appendTo(jQuery(this).parent());            
      } else {
        jQuery(this).clone().removeClass('vc_active').appendTo(jQuery(this).parent());         
      }
      window.addedItens++;
    }
  });

  // add the trigger so we know when to "restart" the animation without the user knowing about it
  jQuery('.vc_custominfiniteloop_restart').bind('addClasschange', null, function(){

    // navigate to the carousel element , I know, its ugly ...
    var vc_carousel = jQuery(this).parent().parent().parent().parent();

    // first we temporarily change the animation speed to zero
    jQuery(vc_carousel).data('vc.carousel').transition_speed = 0;

    // make the slider go to the first slide without animation and because the fist set of images shown
    // are the same that are being shown now the slider is now "restarted" without that being visible 
    jQuery(vc_carousel).data('vc.carousel').to(0);

    // allow the carousel to go to the first image and restore the original speed 
    setTimeout("vc_cil_restore_transition_speed('"+jQuery(vc_carousel).prop('id')+"')",100);
  });

}

// restore original speed setting of vc_carousel
function vc_cil_restore_transition_speed(element_id){
// after inspecting the original source code the value of 600 is defined there so we put back the original here
jQuery('#' + element_id).data('vc.carousel').transition_speed = 600; 
}

// init     
jQuery(document).ready(function(){    
  // find all vc_carousel with the defined class and turn them into infine loop
  jQuery('.vc_custominfiniteloop').find('div[data-ride="vc_carousel"]').each(function(){
    // allow time for the slider to be built on the page
    // because the slider is "long" we can wait a bit before adding images and events needed  
    var vc_cil_element = jQuery(this).prop("id");
    setTimeout("vc_custominfiniteloop_init('"+vc_cil_element+"')",2000);      
  });    
});