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