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