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