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'use strict'; const strictUriEncode = require('strict-uri-encode'); const decodeComponent = require('decode-uri-component'); const splitOnFirst = require('split-on-first'); function encoderForArrayFormat(options) { switch (options.arrayFormat) { case 'index': return key => (result, value) => { const index = result.length; if (value === undefined) { return result; } if (value === null) { return [...result, [encode(key, options), '[', index, ']'].join('')]; } return [ ...result, [encode(key, options), '[', encode(index, options), ']=', encode(value, options)].join('') ]; }; case 'bracket': return key => (result, value) => { if (value === undefined) { return result; } if (value === null) { return [...result, [encode(key, options), '[]'].join('')]; } return [...result, [encode(key, options), '[]=', encode(value, options)].join('')]; }; case 'comma': return key => (result, value, index) => { if (value === null || value === undefined || value.length === 0) { return result; } if (index === 0) { return [[encode(key, options), '=', encode(value, options)].join('')]; } return [[result, encode(value, options)].join(',')]; }; default: return key => (result, value) => { if (value === undefined) { return result; } if (value === null) { return [...result, encode(key, options)]; } return [...result, [encode(key, options), '=', encode(value, options)].join('')]; }; } } function parserForArrayFormat(options) { let result; switch (options.arrayFormat) { case 'index': return (key, value, accumulator) => { result = /\[(\d*)\]$/.exec(key); key = key.replace(/\[\d*\]$/, ''); if (!result) { accumulator[key] = value; return; } if (accumulator[key] === undefined) { accumulator[key] = {}; } accumulator[key][result[1]] = value; }; case 'bracket': return (key, value, accumulator) => { result = /(\[\])$/.exec(key); key = key.replace(/\[\]$/, ''); if (!result) { accumulator[key] = value; return; } if (accumulator[key] === undefined) { accumulator[key] = [value]; return; } accumulator[key] = [].concat(accumulator[key], value); }; case 'comma': return (key, value, accumulator) => { const isArray = typeof value === 'string' && value.split('').indexOf(',') > -1; const newValue = isArray ? value.split(',') : value; accumulator[key] = newValue; }; default: return (key, value, accumulator) => { if (accumulator[key] === undefined) { accumulator[key] = value; return; } accumulator[key] = [].concat(accumulator[key], value); }; } } function encode(value, options) { if (options.encode) { return options.strict ? strictUriEncode(value) : encodeURIComponent(value); } return value; } function decode(value, options) { if (options.decode) { return decodeComponent(value); } return value; } function keysSorter(input) { if (Array.isArray(input)) { return input.sort(); } if (typeof input === 'object') { return keysSorter(Object.keys(input)) .sort((a, b) => Number(a) - Number(b)) .map(key => input[key]); } return input; } function removeHash(input) { const hashStart = input.indexOf('#'); if (hashStart !== -1) { input = input.slice(0, hashStart); } return input; } function extract(input) { input = removeHash(input); const queryStart = input.indexOf('?'); if (queryStart === -1) { return ''; } return input.slice(queryStart + 1); } function parse(input, options) { options = Object.assign({ decode: true, sort: true, arrayFormat: 'none', parseNumbers: false, parseBooleans: false }, options); const formatter = parserForArrayFormat(options); // Create an object with no prototype const ret = Object.create(null); if (typeof input !== 'string') { return ret; } input = input.trim().replace(/^[?#&]/, ''); if (!input) { return ret; } for (const param of input.split('&')) { let [key, value] = splitOnFirst(param.replace(/\+/g, ' '), '='); // Missing `=` should be `null`: // http://w3.org/TR/2012/WD-url-20120524/#collect-url-parameters value = value === undefined ? null : decode(value, options); if (options.parseNumbers && !Number.isNaN(Number(value)) && (typeof value === 'string' && value.trim() !== '')) { value = Number(value); } else if (options.parseBooleans && value !== null && (value.toLowerCase() === 'true' || value.toLowerCase() === 'false')) { value = value.toLowerCase() === 'true'; } formatter(decode(key, options), value, ret); } if (options.sort === false) { return ret; } return (options.sort === true ? Object.keys(ret).sort() : Object.keys(ret).sort(options.sort)).reduce((result, key) => { const value = ret[key]; if (Boolean(value) && typeof value === 'object' && !Array.isArray(value)) { // Sort object keys, not values result[key] = keysSorter(value); } else { result[key] = value; } return result; }, Object.create(null)); } exports.extract = extract; exports.parse = parse; exports.stringify = (object, options) => { if (!object) { return ''; } options = Object.assign({ encode: true, strict: true, arrayFormat: 'none' }, options); const formatter = encoderForArrayFormat(options); const keys = Object.keys(object); if (options.sort !== false) { keys.sort(options.sort); } return keys.map(key => { const value = object[key]; if (value === undefined) { return ''; } if (value === null) { return encode(key, options); } if (Array.isArray(value)) { return value .reduce(formatter(key), []) .join('&'); } return encode(key, options) + '=' + encode(value, options); }).filter(x => x.length > 0).join('&'); }; exports.parseUrl = (input, options) => { return { url: removeHash(input).split('?')[0] || '', query: parse(extract(input), options) }; };
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