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19 lines
701 B
JavaScript
19 lines
701 B
JavaScript
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'use strict';
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var regexParser = require('regex-parser');
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var REGEXP = /(\/?)(.+)\1([a-z]*)/i;
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/**
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* Parse the give value as a regular expression or give a pass-none expression where it is invalid
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* @param {RegExp|string|*} value An existing expression, or its string representation, or degenerate value
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* @returns {RegExp} The given expression or one matching the RegExp string else a pass-none expression
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*/
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function toRegExp(value) {
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return ((typeof value === 'object') && (typeof value.test === 'function') && value) ||
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((typeof value === 'string') && REGEXP.test(value) && regexParser(value)) ||
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(/^true$|^$/.test(value) && /.*/) ||
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/matchnone^/;
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}
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module.exports = toRegExp;
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