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"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = isBase64;
var _assertString = _interopRequireDefault(require("./util/assertString"));
var _merge = _interopRequireDefault(require("./util/merge"));
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
var notBase64 = /[^A-Z0-9+\/=]/i;
var urlSafeBase64 = /^[A-Z0-9_\-]*$/i;
var defaultBase64Options = {
urlSafe: false
};
function isBase64(str, options) {
(0, _assertString.default)(str);
options = (0, _merge.default)(options, defaultBase64Options);
var len = str.length;
if (options.urlSafe) {
return urlSafeBase64.test(str);
}
if (len % 4 !== 0 || notBase64.test(str)) {
return false;
}
var firstPaddingChar = str.indexOf('=');
return firstPaddingChar === -1 || firstPaddingChar === len - 1 || firstPaddingChar === len - 2 && str[len - 1] === '=';
}
module.exports = exports.default;
module.exports.default = exports.default;
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