From d25e11bee6ca5ca523884da132d18e1400e077b9 Mon Sep 17 00:00:00 2001 From: Minteck Date: Tue, 24 Aug 2021 14:41:48 +0200 Subject: Initial commit --- node_modules/to-regex-range/index.js | 288 +++++++++++++++++++++++++++++++++++ 1 file changed, 288 insertions(+) create mode 100644 node_modules/to-regex-range/index.js (limited to 'node_modules/to-regex-range/index.js') diff --git a/node_modules/to-regex-range/index.js b/node_modules/to-regex-range/index.js new file mode 100644 index 0000000..77fbace --- /dev/null +++ b/node_modules/to-regex-range/index.js @@ -0,0 +1,288 @@ +/*! + * 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; -- cgit