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- const { hasOwnProperty } = Object.prototype
- const encode = (obj, opt = {}) => {
- if (typeof opt === 'string') {
- opt = { section: opt }
- }
- opt.align = opt.align === true
- opt.newline = opt.newline === true
- opt.sort = opt.sort === true
- opt.whitespace = opt.whitespace === true || opt.align === true
- // The `typeof` check is required because accessing the `process` directly fails on browsers.
- /* istanbul ignore next */
- opt.platform = opt.platform || (typeof process !== 'undefined' && process.platform)
- opt.bracketedArray = opt.bracketedArray !== false
- /* istanbul ignore next */
- const eol = opt.platform === 'win32' ? '\r\n' : '\n'
- const separator = opt.whitespace ? ' = ' : '='
- const children = []
- const keys = opt.sort ? Object.keys(obj).sort() : Object.keys(obj)
- let padToChars = 0
- // If aligning on the separator, then padToChars is determined as follows:
- // 1. Get the keys
- // 2. Exclude keys pointing to objects unless the value is null or an array
- // 3. Add `[]` to array keys
- // 4. Ensure non empty set of keys
- // 5. Reduce the set to the longest `safe` key
- // 6. Get the `safe` length
- if (opt.align) {
- padToChars = safe(
- (
- keys
- .filter(k => obj[k] === null || Array.isArray(obj[k]) || typeof obj[k] !== 'object')
- .map(k => Array.isArray(obj[k]) ? `${k}[]` : k)
- )
- .concat([''])
- .reduce((a, b) => safe(a).length >= safe(b).length ? a : b)
- ).length
- }
- let out = ''
- const arraySuffix = opt.bracketedArray ? '[]' : ''
- for (const k of keys) {
- const val = obj[k]
- if (val && Array.isArray(val)) {
- for (const item of val) {
- out += safe(`${k}${arraySuffix}`).padEnd(padToChars, ' ') + separator + safe(item) + eol
- }
- } else if (val && typeof val === 'object') {
- children.push(k)
- } else {
- out += safe(k).padEnd(padToChars, ' ') + separator + safe(val) + eol
- }
- }
- if (opt.section && out.length) {
- out = '[' + safe(opt.section) + ']' + (opt.newline ? eol + eol : eol) + out
- }
- for (const k of children) {
- const nk = splitSections(k, '.').join('\\.')
- const section = (opt.section ? opt.section + '.' : '') + nk
- const child = encode(obj[k], {
- ...opt,
- section,
- })
- if (out.length && child.length) {
- out += eol
- }
- out += child
- }
- return out
- }
- function splitSections (str, separator) {
- var lastMatchIndex = 0
- var lastSeparatorIndex = 0
- var nextIndex = 0
- var sections = []
- do {
- nextIndex = str.indexOf(separator, lastMatchIndex)
- if (nextIndex !== -1) {
- lastMatchIndex = nextIndex + separator.length
- if (nextIndex > 0 && str[nextIndex - 1] === '\\') {
- continue
- }
- sections.push(str.slice(lastSeparatorIndex, nextIndex))
- lastSeparatorIndex = nextIndex + separator.length
- }
- } while (nextIndex !== -1)
- sections.push(str.slice(lastSeparatorIndex))
- return sections
- }
- const decode = (str, opt = {}) => {
- opt.bracketedArray = opt.bracketedArray !== false
- const out = Object.create(null)
- let p = out
- let section = null
- // section |key = value
- const re = /^\[([^\]]*)\]\s*$|^([^=]+)(=(.*))?$/i
- const lines = str.split(/[\r\n]+/g)
- const duplicates = {}
- for (const line of lines) {
- if (!line || line.match(/^\s*[;#]/) || line.match(/^\s*$/)) {
- continue
- }
- const match = line.match(re)
- if (!match) {
- continue
- }
- if (match[1] !== undefined) {
- section = unsafe(match[1])
- if (section === '__proto__') {
- // not allowed
- // keep parsing the section, but don't attach it.
- p = Object.create(null)
- continue
- }
- p = out[section] = out[section] || Object.create(null)
- continue
- }
- const keyRaw = unsafe(match[2])
- let isArray
- if (opt.bracketedArray) {
- isArray = keyRaw.length > 2 && keyRaw.slice(-2) === '[]'
- } else {
- duplicates[keyRaw] = (duplicates?.[keyRaw] || 0) + 1
- isArray = duplicates[keyRaw] > 1
- }
- const key = isArray && keyRaw.endsWith('[]')
- ? keyRaw.slice(0, -2) : keyRaw
- if (key === '__proto__') {
- continue
- }
- const valueRaw = match[3] ? unsafe(match[4]) : true
- const value = valueRaw === 'true' ||
- valueRaw === 'false' ||
- valueRaw === 'null' ? JSON.parse(valueRaw)
- : valueRaw
- // Convert keys with '[]' suffix to an array
- if (isArray) {
- if (!hasOwnProperty.call(p, key)) {
- p[key] = []
- } else if (!Array.isArray(p[key])) {
- p[key] = [p[key]]
- }
- }
- // safeguard against resetting a previously defined
- // array by accidentally forgetting the brackets
- if (Array.isArray(p[key])) {
- p[key].push(value)
- } else {
- p[key] = value
- }
- }
- // {a:{y:1},"a.b":{x:2}} --> {a:{y:1,b:{x:2}}}
- // use a filter to return the keys that have to be deleted.
- const remove = []
- for (const k of Object.keys(out)) {
- if (!hasOwnProperty.call(out, k) ||
- typeof out[k] !== 'object' ||
- Array.isArray(out[k])) {
- continue
- }
- // see if the parent section is also an object.
- // if so, add it to that, and mark this one for deletion
- const parts = splitSections(k, '.')
- p = out
- const l = parts.pop()
- const nl = l.replace(/\\\./g, '.')
- for (const part of parts) {
- if (part === '__proto__') {
- continue
- }
- if (!hasOwnProperty.call(p, part) || typeof p[part] !== 'object') {
- p[part] = Object.create(null)
- }
- p = p[part]
- }
- if (p === out && nl === l) {
- continue
- }
- p[nl] = out[k]
- remove.push(k)
- }
- for (const del of remove) {
- delete out[del]
- }
- return out
- }
- const isQuoted = val => {
- return (val.startsWith('"') && val.endsWith('"')) ||
- (val.startsWith("'") && val.endsWith("'"))
- }
- const safe = val => {
- if (
- typeof val !== 'string' ||
- val.match(/[=\r\n]/) ||
- val.match(/^\[/) ||
- (val.length > 1 && isQuoted(val)) ||
- val !== val.trim()
- ) {
- return JSON.stringify(val)
- }
- return val.split(';').join('\\;').split('#').join('\\#')
- }
- const unsafe = val => {
- val = (val || '').trim()
- if (isQuoted(val)) {
- // remove the single quotes before calling JSON.parse
- if (val.charAt(0) === "'") {
- val = val.slice(1, -1)
- }
- try {
- val = JSON.parse(val)
- } catch {
- // ignore errors
- }
- } else {
- // walk the val to find the first not-escaped ; character
- let esc = false
- let unesc = ''
- for (let i = 0, l = val.length; i < l; i++) {
- const c = val.charAt(i)
- if (esc) {
- if ('\\;#'.indexOf(c) !== -1) {
- unesc += c
- } else {
- unesc += '\\' + c
- }
- esc = false
- } else if (';#'.indexOf(c) !== -1) {
- break
- } else if (c === '\\') {
- esc = true
- } else {
- unesc += c
- }
- }
- if (esc) {
- unesc += '\\'
- }
- return unesc.trim()
- }
- return val
- }
- module.exports = {
- parse: decode,
- decode,
- stringify: encode,
- encode,
- safe,
- unsafe,
- }
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