export function appendTag (row, keywords, field='Libellé') {
  // Append row.tag
  // if row.libellé contains one of words and not invert it gets tagged
  // if row.libellé contains no words and invert it gets tagged
  // according to keywords [{name: string, words: [], invert: bool}]
  // row['tags'] =
  row.tags = keywords.filter(k => {
    return strContains(row[field], k.words, k.invert)
  })
}

function strContains (string, words, invert) {
  // Does a string contain one of words or the opposite
  if (!words) {
    return true
  }
  if (invert) {
    return words.every(v => {
      return string.indexOf(v) < 0
    })
  } else {
    return words.some(v => {
      return string.indexOf(v) >= 0
    })
  }
}