function validStr(str) {
// source:
// https://stackoverflow.com/a/36328062/4324393
if (typeof str == "undefined" || !str || str.length === 0 || str === "" || !/[^\s]/.test(str) || /^\s*$/.test(str) || str.replace(/\s/g, "") === "") {
return false; // means str is NOT INVALID
} else {
return true; // means str is VALID
}
}
function getWhatsappURL(number) {
let verifiedNumber = "";
if ( validStr(number) ) {
let f = number.substr(0, 1);
if ( f == "0" ) {
let r = number.substring(1, number.length);
verifiedNumber = "+62" + r;
} else if ( f == "+" ) {
let r = number.substring(1, number.length - 1);
let cc = r.substr(0, 2);
if ( cc == "62" ) {
verifiedNumber = number;
}
} else if ( f == "6" ) {
let cc = number.substr(0, 2);
if (cc == "62") {
verifiedNumber = "+" + number;
}
}
}
if ( validStr(verifiedNumber) ) {
return "whatsapp://send?phone=" + verifiedNumber;
} else {
return "INVALID";
}
}
console.log("INVALID", getWhatsappURL(""));
console.log("VALID", getWhatsappURL("0827462874824"));
console.log("VALID", getWhatsappURL("62827462874824"));
console.log("VALID", getWhatsappURL("+62827462874824"));
console.log("INVALID", getWhatsappURL("827462874824"));
console.log("INVALID", getWhatsappURL("+827462874824"));
console.log("INVALID", getWhatsappURL("+6327462874824"));
