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+/*!
+ * to-regex-range <https://github.com/micromatch/to-regex-range>
+ *
+ * Copyright (c) 2015-present, Jon Schlinkert.
+ * Released under the MIT License.
+ */
+
+'use strict';
+
+const isNumber = require('is-number');
+
+const toRegexRange = (min, max, options) => {
+ if (isNumber(min) === false) {
+ throw new TypeError('toRegexRange: expected the first argument to be a number');
+ }
+
+ if (max === void 0 || min === max) {
+ return String(min);
+ }
+
+ if (isNumber(max) === false) {
+ throw new TypeError('toRegexRange: expected the second argument to be a number.');
+ }
+
+ let opts = { relaxZeros: true, ...options };
+ if (typeof opts.strictZeros === 'boolean') {
+ opts.relaxZeros = opts.strictZeros === false;
+ }
+
+ let relax = String(opts.relaxZeros);
+ let shorthand = String(opts.shorthand);
+ let capture = String(opts.capture);
+ let wrap = String(opts.wrap);
+ let cacheKey = min + ':' + max + '=' + relax + shorthand + capture + wrap;
+
+ if (toRegexRange.cache.hasOwnProperty(cacheKey)) {
+ return toRegexRange.cache[cacheKey].result;
+ }
+
+ let a = Math.min(min, max);
+ let b = Math.max(min, max);
+
+ if (Math.abs(a - b) === 1) {
+ let result = min + '|' + max;
+ if (opts.capture) {
+ return `(${result})`;
+ }
+ if (opts.wrap === false) {
+ return result;
+ }
+ return `(?:${result})`;
+ }
+
+ let isPadded = hasPadding(min) || hasPadding(max);
+ let state = { min, max, a, b };
+ let positives = [];
+ let negatives = [];
+
+ if (isPadded) {
+ state.isPadded = isPadded;
+ state.maxLen = String(state.max).length;
+ }
+
+ if (a < 0) {
+ let newMin = b < 0 ? Math.abs(b) : 1;
+ negatives = splitToPatterns(newMin, Math.abs(a), state, opts);
+ a = state.a = 0;
+ }
+
+ if (b >= 0) {
+ positives = splitToPatterns(a, b, state, opts);
+ }
+
+ state.negatives = negatives;
+ state.positives = positives;
+ state.result = collatePatterns(negatives, positives, opts);
+
+ if (opts.capture === true) {
+ state.result = `(${state.result})`;
+ } else if (opts.wrap !== false && (positives.length + negatives.length) > 1) {
+ state.result = `(?:${state.result})`;
+ }
+
+ toRegexRange.cache[cacheKey] = state;
+ return state.result;
+};
+
+function collatePatterns(neg, pos, options) {
+ let onlyNegative = filterPatterns(neg, pos, '-', false, options) || [];
+ let onlyPositive = filterPatterns(pos, neg, '', false, options) || [];
+ let intersected = filterPatterns(neg, pos, '-?', true, options) || [];
+ let subpatterns = onlyNegative.concat(intersected).concat(onlyPositive);
+ return subpatterns.join('|');
+}
+
+function splitToRanges(min, max) {
+ let nines = 1;
+ let zeros = 1;
+
+ let stop = countNines(min, nines);
+ let stops = new Set([max]);
+
+ while (min <= stop && stop <= max) {
+ stops.add(stop);
+ nines += 1;
+ stop = countNines(min, nines);
+ }
+
+ stop = countZeros(max + 1, zeros) - 1;
+
+ while (min < stop && stop <= max) {
+ stops.add(stop);
+ zeros += 1;
+ stop = countZeros(max + 1, zeros) - 1;
+ }
+
+ stops = [...stops];
+ stops.sort(compare);
+ return stops;
+}
+
+/**
+ * Convert a range to a regex pattern
+ * @param {Number} `start`
+ * @param {Number} `stop`
+ * @return {String}
+ */
+
+function rangeToPattern(start, stop, options) {
+ if (start === stop) {
+ return { pattern: start, count: [], digits: 0 };
+ }
+
+ let zipped = zip(start, stop);
+ let digits = zipped.length;
+ let pattern = '';
+ let count = 0;
+
+ for (let i = 0; i < digits; i++) {
+ let [startDigit, stopDigit] = zipped[i];
+
+ if (startDigit === stopDigit) {
+ pattern += startDigit;
+
+ } else if (startDigit !== '0' || stopDigit !== '9') {
+ pattern += toCharacterClass(startDigit, stopDigit, options);
+
+ } else {
+ count++;
+ }
+ }
+
+ if (count) {
+ pattern += options.shorthand === true ? '\\d' : '[0-9]';
+ }
+
+ return { pattern, count: [count], digits };
+}
+
+function splitToPatterns(min, max, tok, options) {
+ let ranges = splitToRanges(min, max);
+ let tokens = [];
+ let start = min;
+ let prev;
+
+ for (let i = 0; i < ranges.length; i++) {
+ let max = ranges[i];
+ let obj = rangeToPattern(String(start), String(max), options);
+ let zeros = '';
+
+ if (!tok.isPadded && prev && prev.pattern === obj.pattern) {
+ if (prev.count.length > 1) {
+ prev.count.pop();
+ }
+
+ prev.count.push(obj.count[0]);
+ prev.string = prev.pattern + toQuantifier(prev.count);
+ start = max + 1;
+ continue;
+ }
+
+ if (tok.isPadded) {
+ zeros = padZeros(max, tok, options);
+ }
+
+ obj.string = zeros + obj.pattern + toQuantifier(obj.count);
+ tokens.push(obj);
+ start = max + 1;
+ prev = obj;
+ }
+
+ return tokens;
+}
+
+function filterPatterns(arr, comparison, prefix, intersection, options) {
+ let result = [];
+
+ for (let ele of arr) {
+ let { string } = ele;
+
+ // only push if _both_ are negative...
+ if (!intersection && !contains(comparison, 'string', string)) {
+ result.push(prefix + string);
+ }
+
+ // or _both_ are positive
+ if (intersection && contains(comparison, 'string', string)) {
+ result.push(prefix + string);
+ }
+ }
+ return result;
+}
+
+/**
+ * Zip strings
+ */
+
+function zip(a, b) {
+ let arr = [];
+ for (let i = 0; i < a.length; i++) arr.push([a[i], b[i]]);
+ return arr;
+}
+
+function compare(a, b) {
+ return a > b ? 1 : b > a ? -1 : 0;
+}
+
+function contains(arr, key, val) {
+ return arr.some(ele => ele[key] === val);
+}
+
+function countNines(min, len) {
+ return Number(String(min).slice(0, -len) + '9'.repeat(len));
+}
+
+function countZeros(integer, zeros) {
+ return integer - (integer % Math.pow(10, zeros));
+}
+
+function toQuantifier(digits) {
+ let [start = 0, stop = ''] = digits;
+ if (stop || start > 1) {
+ return `{${start + (stop ? ',' + stop : '')}}`;
+ }
+ return '';
+}
+
+function toCharacterClass(a, b, options) {
+ return `[${a}${(b - a === 1) ? '' : '-'}${b}]`;
+}
+
+function hasPadding(str) {
+ return /^-?(0+)\d/.test(str);
+}
+
+function padZeros(value, tok, options) {
+ if (!tok.isPadded) {
+ return value;
+ }
+
+ let diff = Math.abs(tok.maxLen - String(value).length);
+ let relax = options.relaxZeros !== false;
+
+ switch (diff) {
+ case 0:
+ return '';
+ case 1:
+ return relax ? '0?' : '0';
+ case 2:
+ return relax ? '0{0,2}' : '00';
+ default: {
+ return relax ? `0{0,${diff}}` : `0{${diff}}`;
+ }
+ }
+}
+
+/**
+ * Cache
+ */
+
+toRegexRange.cache = {};
+toRegexRange.clearCache = () => (toRegexRange.cache = {});
+
+/**
+ * Expose `toRegexRange`
+ */
+
+module.exports = toRegexRange;