/* LastResort JS file */

$(document).ready(function ()
{ 'use strict';

// function to turn a slice name into a selector reference for the corresponding <section> tag
function GetSectionTagRef(SliceName) {
	return 'section.' + SliceName + ' ';
}

var SectionTag, SectionTags; // will be used to hold required slices
function SectionTagExists(SliceName) {
	if (SectionTags.hasClass(SliceName)) {
		SectionTag = SectionTags.filter(GetSectionTagRef(SliceName));
		if (SectionTag.length !== 0) { // at least one slice exists, great. You could have more than one in theory.
			return true;
		}
	}
	SectionTag = undefined; // remove all data.
	return false;
}

// function to test if text exists.
var sAttrText, sAttrText2, sAttrText3, sAttrText4; // Results come back in these variables.
var DollarTextarea = $("<textarea/>"); // store this once.
function TextExists(attrText, bSplit) {

	if (attrText === undefined) {return false;}
	if (attrText === null) {return false;}

	var TextToProcess = attrText.trim();
	if (TextToProcess === '') {return false;}

	// decode the text, so that &amp;lt; becomes < etc.
	// This works by turning into HTML and then turning back into text.
	if (TextToProcess.indexOf('&') !== -1) { // we could use the .includes('&') method, but it is quite new, so some browsers can't cope.
		TextToProcess = DollarTextarea.html(TextToProcess).text();
	}
	if (TextToProcess === '') {return false;}

	sAttrText = ''; // set return values to blank.
	sAttrText2 = '';
	sAttrText3 = '';
	sAttrText4 = '';
	if (bSplit) {
		var arrSplitText = TextToProcess.split('*');
		sAttrText = arrSplitText[0].trim();
		if (arrSplitText.length > 1) {sAttrText2 = arrSplitText[1].trim();}
		if (arrSplitText.length > 2) {sAttrText3 = arrSplitText[2].trim();}
		if (arrSplitText.length > 3) {sAttrText4 = arrSplitText[3].trim();}
	} else {
		sAttrText = TextToProcess;
	}

	return (sAttrText + sAttrText2 + sAttrText3 + sAttrText4 !== '');
}

// Make slides work if they have a link, but no caption.
function FixBxSlider(SliceName) {
	if (SectionTagExists(SliceName)) { // check if slice exists, and load into SectionTag if it does
        SectionTag.find('img').each(function() {
			var ThisImg = $(this);
			if(!ThisImg.next().hasClass('caption')){ // No caption at all
				if (TextExists(ThisImg.parent().attr('href'), false)) { // but there is a link...
					var ButtonLink = '<a class="slideButton Invisible" href="' + sAttrText + '">&nbsp;</a>';
					var caption = '<div class="caption">' + ButtonLink + '</div>';
					$(caption).insertAfter(ThisImg);
                  	//console.log(sAttrText);
				}
			}
		});
	}
}
 
// Make slides work if they have a link, but no caption.
function FixBxSliderNewTabButtons(SliceName) {
	if (SectionTagExists(SliceName)) { // check if slice exists, and load into SectionTag if it does
        SectionTag.find('a.slideButton').each(function() {
			var ThisA = $(this);
          	var P = ThisA.parent();
			var bTargetBlank = (P.parent().attr('target') === "_blank")
            					|| (P.prev().prev().attr('target') === "_blank");
			if(bTargetBlank){
				ThisA.attr('target','_blank');
			}
		});
	}
}

var bOnTouchDevice = ('ontouchstart' in window) || (navigator.maxTouchPoints > 0) || (navigator.msMaxTouchPoints > 0);
var BodyTag = $('body');
var bLoggedIn = BodyTag.hasClass('logged_in_user');
SectionTags = BodyTag.find('section'); // Store all the section tags to speed up later code.
var bOnContentPage = SectionTags.hasClass('slice_content_page');
var bOnHomePage = SectionTags.hasClass('slice_SlidesFullWidth');

// Hide the visitor widget if the article does not publicly exist.
if (!bLoggedIn && SectionTagExists('SeekerBox')) {
	if(SectionTag.children('div.FullSeekerArticle').find('div.ArticleBody').length === 0){
		SectionTag.addClass('HideElement').hide();
	}
}

if (bOnHomePage) {
  	// hide the Covid banner if empty
 	if (SectionTagExists('CoronaVirus')) {
      if(SectionTag.find('div.ArticleBody').length === 0){
        SectionTag.hide();
      }
	}
  
  	// hide the service times/location slice if empty
 	if (SectionTagExists('slice_ServiceText_L')) {
      var Blocks = SectionTag.find('div.blocks');
      if(Blocks.length === 1){
        if(Blocks.find('div.ArticleBody').length === 0){
          SectionTag.hide();
        }
      }
	}  

  if(bOnTouchDevice){
    // Make slides work on touch devices if they have a link, but no caption.
      FixBxSlider('slice_SlidesFullWidth');
      FixBxSlider('slice_WhatsOnSlidesEB_L');
  }
  FixBxSliderNewTabButtons('slice_SlidesFullWidth');
  FixBxSliderNewTabButtons('slice_WhatsOnSlidesEB_L');
}

// Make sure anchor links do not dissappear behind a fixed header.
if (bOnContentPage) {
	var iHeaderHeight = 0;
	if (SectionTagExists('slice_Header_L')) {
		var CssPosition = SectionTag.css('position');
		if (CssPosition === 'fixed'){ // only do if we have a fixed header.
			iHeaderHeight = SectionTag.outerHeight();
		}
	}
	if (iHeaderHeight > 0 && SectionTagExists('slice_content_page')) {
		var HashLinks = SectionTag.find('a:not([href="#"])[href^="#"]');
		HashLinks.click(function(){
			window.setTimeout(function(){window.scrollBy(0, -iHeaderHeight);}, 250); // wait 250ms, then scroll down, so link is not under the header.
		});
	}
}
 
 // Fix issue with scrolling on search results pages.
 var SP = BodyTag.find('section.slice_system_page._publisher_search_aspx div.system_pager');
 if(SP.length > 0){
   var Pager = SP.find('span[id$="_dpArticles"]');
   if(Pager.length === 1){
     var A = Pager.find('a.system_pager_next');
     var S = A.attr('href');
     if(typeof S !== typeof undefined){
       S = S.replace('javascript:_','javascript:window.scrollTo(0,0);_');
       A.attr('href', S);
     }
     A = Pager.find('a.system_pager_prev');
     S = A.attr('href');
     if(typeof S !== typeof undefined){
       S = S.replace('javascript:_','javascript:window.scrollTo(0,0);_');
       A.attr('href', S);
     }
     A = Pager.find('select');
     S = A.attr('onchange');
     if(typeof S !== typeof undefined){
       S = S.replace('javascript:s','javascript:window.scrollTo(0,0);s');
       A.attr('onchange', S);
     }
   }
   Pager = SP.find('span[id$="dpEvents"]');
   if(Pager.length === 1){
     var A = Pager.find('a.system_pager_next');
     var S = A.attr('href');
     if(typeof S !== typeof undefined){
       S = S.replace('javascript:_','javascript:window.scrollTo(0,0);_');
       A.attr('href', S);
     }
     A = Pager.find('a.system_pager_prev');
     S = A.attr('href');
     if(typeof S !== typeof undefined){
       S = S.replace('javascript:_','javascript:window.scrollTo(0,0);_');
       A.attr('href', S);
     }
     A = Pager.find('select');
     S = A.attr('onchange');
     if(typeof S !== typeof undefined){
       S = S.replace('javascript:s','javascript:window.scrollTo(0,0);s');
       A.attr('onchange', S);
     }
   }
 }
 
// Hide mobile register link on sites that don't need it.
 if(!bLoggedIn){
   var HSB = BodyTag.find('div.HiddenStatusBar');
   if(HSB.length > 0){
     if(HSB.find('a.register_link').length === 0){
       BodyTag.find('header ul.slicknav_nav li.ExtraLink a[href]').each(function(){
         var T = $(this);
         var S = T.attr('href').trim().toLowerCase();
         if(S === '/user/registration.aspx'){T.parent().addClass('HideElement').hide();}
       });
     }
   }
 }

});