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30 lines
694 B
30 lines
694 B
2 years ago
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"use strict";
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/**
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* RegexParser
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* Parses a string input.
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*
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* @name RegexParser
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* @function
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* @param {String} input The string input that should be parsed as regular
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* expression.
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* @return {RegExp} The parsed regular expression.
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*/
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var RegexParser = module.exports = function (input) {
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// Validate input
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if (typeof input !== "string") {
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throw new Error("Invalid input. Input must be a string");
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}
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// Parse input
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var m = input.match(/(\/?)(.+)\1([a-z]*)/i);
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// Invalid flags
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if (m[3] && !/^(?!.*?(.).*?\1)[gmixXsuUAJ]+$/.test(m[3])) {
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return RegExp(input);
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}
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// Create the regular expression
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return new RegExp(m[2], m[3]);
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};
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