mdo/mdo.js

Markdown Object Parser

var M = module.exports = {}

M.parseJson = function (json) { // Simplified JSON
  json = json.replace(/(\W)(\w+):/gm, '$1"$2":') // id: => "id":
  return JSON.parse(json)
}

M.parseValue = function (value) {
  var json
  try {
    if (value.match(/.*\|.*\n\|?-+\|[|-]+\n/)) {
      json = M.parseTable(value)
    } else {
      json = M.parseJson(value)
    }
  } catch (e) {
    json = value
  }
  return json
}

M.parseTable = function (table, skipFields) {
  skipFields = skipFields || []
//  console.log('table.length=', table.length, 'typeof table=', typeof table)
  var lines = table.split(/\r?\n/)
  var len = lines.length
  var jsonTable = []
  var types = []
  var fields = lines[0].split(/\s*\|\s*/)
  for (var i = 0; i < fields.length; i++) {
    var tokens = fields[i].split(':')
    fields[i] = tokens[0].trim()
    types[i] = (tokens.length >= 2) ? tokens[1].trim() : 'string'
  }
  for (i = 2; i < len; i++) {
    var line = lines[i].split('//')[0]
    if (line.length === 0) continue
    var values = line.split('|')
    var vlen = values.length
    var json = {}
    for (var vi = 0; vi < vlen; vi++) {
      var value = values[vi].trim()
      switch (types[vi]) {
        case 'json' : value = M.parseJson(value); break
        case 'number': value = parseFloat(value); break
        case 'boolean': value = JSON.parse(value); break
        case 'date' : value = (new Date(value)).toJSON(); break
      }
      if (skipFields.indexOf(fields[vi]) < 0 && value.length > 0 && fields[vi].length > 0) {
        json[fields[vi]] = value
      }
    }
    jsonTable.push(json)
  }
  return jsonTable
}

M.list2str = function (objs, fields) {
  var lines = []
  var head = fields.join('|')
  lines.push(head)
  lines.push(head.replace(/[^|]/g, '-'))
  for (var i in objs) {
    var obj = objs[i]
    var line = ''
    for (var fi in fields) {
      var value = obj[fields[fi]] || ''
      line += '|' + value
    }
    lines.push(line.substring(1))
  }
  return lines.join('\n')
}

M.tableReorder = function(table, fields) {
  var objs = M.parseTable(table)
  return M.list2str(objs, fields)
}

M.parseMdo = function (mdo) {
  var obj = {}
  var field
  var valueLines = []
  var lines = mdo.split(/\r?\n/)
  for (var i = 0, len = lines.length; i < len; i++) {
    var line = lines[i]
    var m = line.match(/^([^\s\u2000-\u206F\u2E00-\u2E7F\\'!"#$%&()*+,./<=>?@[\]^`{|}~]+)\s*:\s*(.*)$/)
    if (m) {
      if (typeof field !== 'undefined') {
        obj[field] = M.parseValue(valueLines.join('\n').trim())
      }
      field = m[1]
      valueLines = [ m[2] ]
    } else {
      valueLines.push(line)
    }
  }
  if (valueLines.length > 0 && typeof field !== 'undefined') {
    obj[field] = M.parseValue(valueLines.join('\n').trim())
  }
  return obj
}

M.index = function (jsons, field, append) {
  append = append || false
  var map = {}
  for (var i in jsons) {
    var json = jsons[i]
    var key = json[field]
    if (append || typeof map[key] === 'undefined') {
      map[key] = json
    }
  }
  return map
}