function brain_cookie_optin_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 "";
}

function brain_cookie_optin_setCookie(name,value,days) {
    let expires = "";
    if (days) {
        let date = new Date();
        date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
        expires = "; expires=" + date.toUTCString();
    }
    document.cookie = name + "=" + (value || "")  + expires + "; path=/";
}

function brain_cookie_optin_init() {
    let acceptButton = document.getElementById("brain-cookie-optin-button-accept");
    acceptButton.addEventListener("click", function (e) {
        e.preventDefault();
        brain_cookie_optin_setCookie('brain_cookie_optin_allow_tracking', 'true', 90);
        location.reload();
    }, false);

    let declineButton = document.getElementById("brain-cookie-optin-button-decline");
    declineButton.addEventListener("click", function (e) {
        e.preventDefault();
        let cookieBox = document.getElementById("brain-cookie-optin-cookiebox");
        cookieBox.classList.add("hidden-box");
        let cookieOverlay = document.getElementsByClassName('brain-cookie-overlay');
        cookieOverlay[0].classList.add("hide");
        brain_cookie_optin_setCookie('brain_cookie_optin_allow_tracking', 'false', 90);
    }, false);
}


			// decrypt helper function
		function decryptCharcode(n,start,end,offset) {
			n = n + offset;
			if (offset > 0 && n > end) {
				n = start + (n - end - 1);
			} else if (offset < 0 && n < start) {
				n = end - (start - n - 1);
			}
			return String.fromCharCode(n);
		}
			// decrypt string
		function decryptString(enc,offset) {
			var dec = "";
			var len = enc.length;
			for(var i=0; i < len; i++) {
				var n = enc.charCodeAt(i);
				if (n >= 0x2B && n <= 0x3A) {
					dec += decryptCharcode(n,0x2B,0x3A,offset);	// 0-9 . , - + / :
				} else if (n >= 0x40 && n <= 0x5A) {
					dec += decryptCharcode(n,0x40,0x5A,offset);	// A-Z @
				} else if (n >= 0x61 && n <= 0x7A) {
					dec += decryptCharcode(n,0x61,0x7A,offset);	// a-z
				} else {
					dec += enc.charAt(i);
				}
			}
			return dec;
		}
			// decrypt spam-protected emails
		function linkTo_UnCryptMailto(s) {
			location.href = decryptString(s,3);
		}