script.js

function getDistanceFromLatLonInKm(lat1,lon1,lat2,lon2) {
  var R = 6371; // Radius of the earth in km
  var dLat = deg2rad(lat2-lat1);  // deg2rad below
  var dLon = deg2rad(lon2-lon1);
  var a =
    Math.sin(dLat/2) * Math.sin(dLat/2) +
    Math.cos(deg2rad(lat1)) * Math.cos(deg2rad(lat2)) *
    Math.sin(dLon/2) * Math.sin(dLon/2)
    ;
  var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a));
  var d = R * c; // Distance in km
  return d;
}

function deg2rad(deg) {
  return deg * (Math.PI/180)
}

function get_by_tag(tags){

  $('.orderlist-div').toggleClass('d-none',true);
  $('.li-tags').toggleClass('active', false );
  $('.li-subtags').toggleClass('active', false ).toggleClass('d-none',true);


  var tag_class='';

  tags.forEach(
    function(v,i){
      tag_class+='.tag-'+v;
      $('.li-tag-'+v).toggleClass('active',true);
      $('.li-subtag-of-'+v).toggleClass('d-none', false);
    }
  );

  $(tag_class).toggleClass('d-none',false);

  var p=['tag','subtag','lat','long'];
  var tag=tags[0];
  var subtag=tags[1];
  var lat=undefined;
  var long=undefined;

  var param=[];

  p.forEach(
    function(v){
      if( eval(v) != undefined ){
        var pp=eval(v);
      } else {
        var pp=getQueryVariable(v);
      }
      if( pp != undefined ) param.push(v + '='+pp);
    }
  );

  ChangeUrl( '',  (( param != '' ) ? '?' : '' )+param.join('&') );
}

function get_distances_tags(){

  var url_string = window.location.href;
  var url = new URL(url_string);
  var lat = url.searchParams.get('lat');
  var long = url.searchParams.get('long');

  var tag = url.searchParams.get('tag');
  var subtag = url.searchParams.get('subtag');
  get_by_tag([ tag, subtag ]);

  if( lat == null || long == null ){
    lat=-100;
  }
  var calc_distance=false;
  if( lat >= -90 && lat <= 90 && long >=-180 && long <= 180 ){
    calc_distance=true;
  }

  $.each( $('.distance'), function(i,v){
    var geo=$( $(v).context.previousElementSibling ).text();
    var llat=geo.split(/,/g)[0];
    var llong=geo.split(/,/g)[1];
    var lcountry=geo.split(/,/g)[2];
    $(v).html('<span class="feather-icon icon-map-pin"></span> ' + lcountry + ' ' + (( calc_distance ) ? '( ' + Math.round( getDistanceFromLatLonInKm (lat, long, llat, llong ) )+'km ) ' : '' ) );
  } );
}

function formInput(obj){
  if( $(obj).hasClass('form-decimals') ){
    $(obj).toggleClass('is-invalid', ! $.isNumeric( $(obj).val() ) );
  }
}

function createYml(){
  var yml='';
  $.each( $('.order-form'),
    function(i,v){
      if( v.id == 'price-reference' ){
        yml+=v.id + ':\n\t- [ ' + $(v).val().replace(/(?:\r\n|\r|\n)/g, '<br>') + ' ]\n';
      } else {
        yml+=v.id + ': ' + $(v).val().replace(/(?:\r\n|\r|\n)/g, '<br>') + '\n';
      }

    }
  );
  $('#order-yml').val(yml);
}

function importYml(){
  var yml=$('#order-yml').val();
  var error='';
  $('#order-yml').toggleClass('is-invalid',false);
  var lastf='';
  yml.split('\n').forEach(
    function(v,i){
      if( v == '' ) return;
      if( v.split(/-/g)[0].trim() == '' || v.split(/-/g)[0].trim() == '\t' ){
        $('#'+lastf).val( v.split(/-/g)[1].replace(/\[|\]| /g,'').trim() );
        return;
      }
      var p=v.split(':')[0].trim();
      var v=v.split(':').slice(1).join(':').trim();
      if( $('#'+p).length == 1 ){
        if( $('#'+p)[0].localName == 'select' ){
          if( p == 'price-reference' ){
            lastf=p; return;
          } else if( $('#'+p).val(v).val() != v ){
            error+='#'+p+' value ['+v+'] not exists in the list!';
          }
        }
      } else {
        error+='#'+p+' not found in form!';
      }
      if( error != ''){
        alert( 'error: \n'+error );
        error='';
        $('#order-yml').toggleClass('is-invalid',true);
      } else {
        $('#'+p).val(v.replace(/\<br\>/ig,'\n'));
      }
    }
  );
}

function getQueryVariable(variable)
{
       var query = window.location.search.substring(1);
       var vars = query.split("&");
       for (var i=0;i<vars.length;i++) {
               var pair = vars[i].split("=");
               if(pair[0] == variable){return pair[1];}
       }
}

function ChangeUrl(page, query ) {
    console.log( query );
    if (typeof (history.replaceState) != "undefined") {
        var obj = { Page: page, Url: query };
        history.replaceState(obj, obj.Page, obj.Url);
    } else {
        alert("Browser does not support HTML5.");
    }
}