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'use strict';
const escapeStringRegexp = require('escape-string-regexp');
const reCache = new Map();
function makeRe(pattern, shouldNegate) {
const cacheKey = pattern + shouldNegate;
if (reCache.has(cacheKey)) {
return reCache.get(cacheKey);
}
let negated = false;
if (pattern[0] === '!') {
negated = true;
pattern = pattern.slice(1);
}
pattern = escapeStringRegexp(pattern).replace(/\\\*/g, '.*');
if (negated && shouldNegate) {
pattern = `(?!${pattern})`;
}
const re = new RegExp(`^${pattern}$`, 'i');
re.negated = negated;
reCache.set(cacheKey, re);
return re;
}
module.exports = (inputs, patterns) => {
if (!(Array.isArray(inputs) && Array.isArray(patterns))) {
throw new TypeError(`Expected two arrays, got ${typeof inputs} ${typeof patterns}`);
}
if (patterns.length === 0) {
return inputs;
}
const firstNegated = patterns[0][0] === '!';
patterns = patterns.map(x => makeRe(x, false));
const ret = [];
for (const input of inputs) {
// If first pattern is negated we include everything to match user expectation
let matches = firstNegated;
// TODO: Figure out why tests fail when I use a for-of loop here
for (let j = 0; j < patterns.length; j++) {
if (patterns[j].test(input)) {
matches = !patterns[j].negated;
}
}
if (matches) {
ret.push(input);
}
}
return ret;
};
module.exports.isMatch = (input, pattern) => makeRe(pattern, true).test(input);
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