exportXLSX.coffee

XLSX = require('xlsx')

sheet_from_array_of_arrays = (data, opts) ->
  ws = {}
  range =
    s:
      c: 10000000
      r: 10000000

    e:
      c: 0
      r: 0

  R = 0

  while R isnt data.length
    C = 0
    while C isnt data[R].length
      range.s.r = R  if range.s.r > R
      range.s.c = C  if range.s.c > C
      range.e.r = R  if range.e.r < R
      range.e.c = C  if range.e.c < C
      cell = v: data[R][C]
      cell.v = '' unless cell.v
      cell_ref = XLSX.utils.encode_cell(
        c: C
        r: R
      )
      if typeof cell.v is "number"
        cell.t = "n"
      else if typeof cell.v is "boolean"
        cell.t = "b"
      else
        cell.t = "s"
      ws[cell_ref] = cell
      ++C
    ++R
  ws["!ref"] = XLSX.utils.encode_range(range)  if range.s.c < 10000000
  ws

ws_name = "Data"

module.exports.export = (data, filename)->
  console.log(XLSX.version)
  wb = SheetNames:[],Sheets:{}
  console.log data.length
  ws = sheet_from_array_of_arrays(data)
  wb.SheetNames.push ws_name
  wb.Sheets[ws_name] = ws
  return XLSX.write wb, {type:'buffer'}