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- const { hasOwnProperty } = Object.prototype
- const eol = typeof process !== 'undefined' &&
- process.platform === 'win32' ? '\r\n' : '\n'
- const encode = (obj, opt) => {
- const children = []
- let out = ''
- if (typeof opt === 'string') {
- opt = {
- section: opt,
- whitespace: false,
- }
- } else {
- opt = opt || Object.create(null)
- opt.whitespace = opt.whitespace === true
- }
- const separator = opt.whitespace ? ' = ' : '='
- for (const k of Object.keys(obj)) {
- const val = obj[k]
- if (val && Array.isArray(val)) {
- for (const item of val)
- out += safe(k + '[]') + separator + safe(item) + '\n'
- } else if (val && typeof val === 'object')
- children.push(k)
- else
- out += safe(k) + separator + safe(val) + eol
- }
- if (opt.section && out.length)
- out = '[' + safe(opt.section) + ']' + eol + out
- for (const k of children) {
- const nk = dotSplit(k).join('\\.')
- const section = (opt.section ? opt.section + '.' : '') + nk
- const { whitespace } = opt
- const child = encode(obj[k], {
- section,
- whitespace,
- })
- if (out.length && child.length)
- out += eol
- out += child
- }
- return out
- }
- const dotSplit = str =>
- str.replace(/\1/g, '\u0002LITERAL\\1LITERAL\u0002')
- .replace(/\\\./g, '\u0001')
- .split(/\./)
- .map(part =>
- part.replace(/\1/g, '\\.')
- .replace(/\2LITERAL\\1LITERAL\2/g, '\u0001'))
- const decode = str => {
- const out = Object.create(null)
- let p = out
- let section = null
- // section |key = value
- const re = /^\[([^\]]*)\]$|^([^=]+)(=(.*))?$/i
- const lines = str.split(/[\r\n]+/g)
- for (const line of lines) {
- if (!line || 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])
- const isArray = keyRaw.length > 2 && keyRaw.slice(-2) === '[]'
- const key = isArray ? 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 = dotSplit(k)
- let 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 =>
- (val.charAt(0) === '"' && val.slice(-1) === '"') ||
- (val.charAt(0) === "'" && val.slice(-1) === "'")
- const safe = val =>
- (typeof val !== 'string' ||
- val.match(/[=\r\n]/) ||
- val.match(/^\[/) ||
- (val.length > 1 &&
- isQuoted(val)) ||
- val !== val.trim())
- ? JSON.stringify(val)
- : val.replace(/;/g, '\\;').replace(/#/g, '\\#')
- const unsafe = (val, doUnesc) => {
- val = (val || '').trim()
- if (isQuoted(val)) {
- // remove the single quotes before calling JSON.parse
- if (val.charAt(0) === "'")
- val = val.substr(1, val.length - 2)
- try {
- val = JSON.parse(val)
- } catch (_) {}
- } 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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