73 lines
1.4 KiB
JavaScript
73 lines
1.4 KiB
JavaScript
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'use strict';
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var escapeStringRegexp = require('escape-string-regexp');
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var reCache = {};
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function makeRe(pattern, shouldNegate) {
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var cacheKey = pattern + shouldNegate;
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if (reCache[cacheKey]) {
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return reCache[cacheKey];
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}
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var negated = false;
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if (pattern[0] === '!') {
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negated = true;
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pattern = pattern.slice(1);
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}
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pattern = escapeStringRegexp(pattern).replace(/\\\*/g, '.*');
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if (negated && shouldNegate) {
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pattern = '(?!' + pattern + ')';
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}
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var re = new RegExp('^' + pattern + '$', 'i');
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re.negated = negated;
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reCache[cacheKey] = re;
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return re;
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}
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module.exports = function (inputs, patterns) {
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if (!(Array.isArray(inputs) && Array.isArray(patterns))) {
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throw new TypeError('Expected two arrays, got ' + typeof inputs + ' ' + typeof patterns);
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}
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if (patterns.length === 0) {
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return inputs;
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}
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var firstNegated = patterns[0][0] === '!';
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patterns = patterns.map(function (x) {
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return makeRe(x, false);
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});
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var ret = [];
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for (var i = 0; i < inputs.length; i++) {
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// if first pattern is negated we include
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// everything to match user expectation
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var matches = firstNegated;
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for (var j = 0; j < patterns.length; j++) {
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if (patterns[j].test(inputs[i])) {
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matches = !patterns[j].negated;
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}
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}
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if (matches) {
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ret.push(inputs[i]);
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}
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}
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return ret;
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};
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module.exports.isMatch = function (input, pattern) {
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return makeRe(pattern, true).test(input);
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};
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