Last change
on this file since 6a3a178 was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago |
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[6a3a178] | 1 | "use strict";
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| 2 |
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| 3 | /**
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| 4 | * RegexParser
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| 5 | * Parses a string input.
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| 6 | *
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| 7 | * @name RegexParser
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| 8 | * @function
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| 9 | * @param {String} input The string input that should be parsed as regular
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| 10 | * expression.
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| 11 | * @return {RegExp} The parsed regular expression.
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| 12 | */
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| 13 | var RegexParser = module.exports = function (input) {
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| 14 |
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| 15 | // Validate input
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| 16 | if (typeof input !== "string") {
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| 17 | throw new Error("Invalid input. Input must be a string");
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| 18 | }
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| 19 |
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| 20 | // Parse input
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| 21 | var m = input.match(/(\/?)(.+)\1([a-z]*)/i);
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| 22 |
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| 23 | // Invalid flags
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| 24 | if (m[3] && !/^(?!.*?(.).*?\1)[gmixXsuUAJ]+$/.test(m[3])) {
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| 25 | return RegExp(input);
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| 26 | }
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| 27 |
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| 28 | // Create the regular expression
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| 29 | return new RegExp(m[2], m[3]);
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| 30 | }; |
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