Check country for a visitor

check-visitor-country.js

/*
 * Info of ip get with https://ipinfo.io/ service
 * Free service have 50k request/month
 * If have a user need use the url https://ipinfo.io/json?<YourToken>
 */


/*
 * Function to create a cookie, need
 * cname = Name of cookie
 * cvalue = Value of cookie
 * exdays = Life of cookie in days
 */
function setCookie(cname, cvalue, exdays) {
  const d = new Date();
  d.setTime(d.getTime() + (exdays * 24 * 60 * 60 * 1000));
  let expires = "expires="+d.toUTCString();
  document.cookie = cname + "=" + cvalue + ";" + expires + ";path=/";
}

/*
 * Get the cookie value
 * cname = Name of cookie to check
 * Return value or null string if not exist
 */
function getCookie(cname) {
  let name = cname + "=";
  let decodedCookie = decodeURIComponent(document.cookie);
  let ca = decodedCookie.split(';');
  for(let i = 0; i <ca.length; i++) {
	let c = ca[i];
	while (c.charAt(0) == ' ') {
	  c = c.substring(1);
	}
	if (c.indexOf(name) == 0) {
	  return c.substring(name.length, c.length);
	}
  }
  return "";
}

/*
 * First check if the visitor isn't a bot, not wanna consume api request
 * country is the name of cookie with info
 * If cookie country not exist do a fetch to ipinfo.io to get visitor location information 
 * and create a cookie country with the value
 */
if( !navigator.userAgent.match(/bot|spider/i) ){
  let country = getCookie("country");
  if ( country == "" ) {
	fetch('https://ipinfo.io/json')
		.then( res => res.json())
		.then( data => {
			setCookie("country", data.country, 365);
		}
	);
  }
}


// USING LOCALSTORAGE
/*
if( !navigator.userAgent.match(/bot|spider/i) ) {
  if ( !localStorage.getItem('country') ) {
	fetch('https://ipinfo.io/json')
	  .then(res => res.json())
	  .then(data => {
		localStorage.setItem('country', data.country)
	})
  } else {
	alert( localStorage.getItem('country') );
  }
}
*/