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import assertString from './util/assertString';
import merge from './util/merge';
var default_fqdn_options = {
require_tld: true,
allow_underscores: false,
allow_trailing_dot: false
};
export default function isFQDN(str, options) {
assertString(str);
options = merge(options, default_fqdn_options);
/* Remove the optional trailing dot before checking validity */
if (options.allow_trailing_dot && str[str.length - 1] === '.') {
str = str.substring(0, str.length - 1);
}
var parts = str.split('.');
for (var i = 0; i < parts.length; i++) {
if (parts[i].length > 63) {
return false;
}
}
if (options.require_tld) {
var tld = parts.pop();
if (!parts.length || !/^([a-z\u00a1-\uffff]{2,}|xn[a-z0-9-]{2,})$/i.test(tld)) {
return false;
} // disallow spaces
if (/[\s\u2002-\u200B\u202F\u205F\u3000\uFEFF\uDB40\uDC20]/.test(tld)) {
return false;
}
}
for (var part, _i = 0; _i < parts.length; _i++) {
part = parts[_i];
if (options.allow_underscores) {
part = part.replace(/_/g, '');
}
if (!/^[a-z\u00a1-\uffff0-9-]+$/i.test(part)) {
return false;
} // disallow full-width chars
if (/[\uff01-\uff5e]/.test(part)) {
return false;
}
if (part[0] === '-' || part[part.length - 1] === '-') {
return false;
}
}
return true;
}
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