ini.js

exports.parse = exports.decode = decode

exports.stringify = exports.encode = encode

exports.safe = safe
exports.unsafe = unsafe

var eol = require('os').EOL

function encode (obj, opt) {
  var children = []
  var out = ''

  if (typeof opt === 'string') {
    opt = {
      section: opt,
      whitespace: false,
      isArray: true,
      unsafe: false,
      sectionSeperator: '*'
    }
  } else {
    opt = opt || {}
    opt.whitespace = opt.hasOwnProperty('whitespace') ? opt.whitespace : false
    opt.isArray = opt.hasOwnProperty('isArray') ? opt.isArray : true
    opt.unsafe = opt.hasOwnProperty('unsafe') ? opt.unsafe : false
    opt.sectionSeperator = opt.hasOwnProperty('sectionSeperator') ? opt.sectionSeperator : '*'
  }

  var separator = opt.whitespace ? ' = ' : '='

  Object.keys(obj).forEach(function (k, _, __) {
    var val = obj[k]
    if (val && Array.isArray(val)) {
      val.forEach(function (item) {
        if (opt.isArray) {
          out += safe(k + '[]') + separator + safeVal(item) + eol
        } else {
          out += safe(k) + separator + (opt.unsafe ? item : safeVal(item)) + eol
        }
      })
    } else if (val && typeof val === 'object') {
      children.push(k)
    } else {
      out += safe(k) + separator + (opt.unsafe ? val : safeVal(val)) + eol
    }
  })

  if (opt.section && out.length) {
    out = '[' + safe(opt.section) + ']' + eol + out
  }

  children.forEach(function (k, _, __) {
    var nk = splitSections(k, opt.sectionSeperator).join('\\.')
    var section = (opt.section ? opt.section + '.' : '') + nk
    var child = encode(obj[k], {
      section: section,
      whitespace: opt.whitespace,
      isArray: opt.isArray,
      unsafe: opt.unsafe,
      sectionSeperator: opt.sectionSeperator
    })
    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
}

function decode (str, opt) {
  opt = opt || {}
  opt.stripQuotes = opt.hasOwnProperty('stripQuotes') ? opt.stripQuotes : true
  opt.sectionSeperator = opt.hasOwnProperty('sectionSeperator') ? opt.sectionSeperator : '*'

  var out = {}
  var p = out
  var section = null
  //          section     |key      = value
  var re = /^\[([^\]]*)\]$|^([^=]+)(=(.*))?$/i
  var lines = str.split(/[\r\n]+/g)
  lines.forEach(function (line, _, __) {
    if (!line || line.match(/^\s*[;#]/)) return
    var match = line.match(re)
    if (!match) return
    if (match[1] !== undefined) {
      section = unsafe(match[1])
      p = out[section] = out[section] || {}
      return
    }
    var key = unsafe(match[2])
    var value = match[3] ? unsafe(match[4], opt.stripQuotes) : true
    switch (value) {
      case 'true':
      case 'false':
      case 'null': value = JSON.parse(value)
    }

    // Convert keys with '[]' suffix to an array
    if ((key.length > 2 && key.slice(-2) === '[]')) {
      key = key.substring(0, key.length - 2)
      if (!p[key]) {
        p[key] = []
      } else if (!Array.isArray(p[key])) {
        p[key] = [p[key]]
      }
    } else if (p[key]) {
      if (!Array.isArray(p[key])) {
        p[key] = [p[key]]
      } else {
        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.
  Object.keys(out).filter(function (k, _, __) {
    if (!out[k] ||
      typeof out[k] !== 'object' ||
      Array.isArray(out[k])) {
      return false
    }
    // see if the parent section is also an object.
    // if so, add it to that, and mark this one for deletion
    var parts = splitSections(k, opt.sectionSeperator)
    var p = out
    var l = parts.pop()
    var nl = l.replace(/\\\./g, '.')
    parts.forEach(function (part, _, __) {
      if (!p[part] || typeof p[part] !== 'object') p[part] = {}
      p = p[part]
    })
    if (p === out && nl === l) {
      return false
    }
    p[nl] = out[k]
    return true
  }).forEach(function (del, _, __) {
    delete out[del]
  })

  return out
}

function isQuoted (val) {
  return (val.charAt(0) === '"' && val.slice(-1) === '"') ||
    (val.charAt(0) === "'" && val.slice(-1) === "'")
}

function safe (val) {
  return (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, '\\#')
}

function safeVal (val) {
  return 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, '\\#')
}

function unsafe (val, stripQuotes = true) {
  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)
    }
    if (stripQuotes) {
      try { val = JSON.parse(val) } catch (_) {}
    }
  } else {
    // walk the val to find the first not-escaped ; character
    var esc = false
    var unesc = ''
    for (var i = 0, l = val.length; i < l; i++) {
      var 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
}