alphascript-server/lib/util/xlsx.js

CRUD operations for mongo and other functionalities to get started quickly in any CMS project

var fs = require('fs');
var xlsx = require('node-xlsx');

module.exports = {
  fromJson: function (data) {
    var sheets = data.sheets.map(function (datum) {
      return getSheet(datum);
    });

    return xlsx.build(sheets);
  }
};

function getSheet(data) {
  var keys = [];
  var sheet = [];

  //header
  if (data.header) {
    var headerData = getHeaderRow(data.header);
    keys = headerData.keys;
    sheet.unshift(headerData.values);
  }

  //data
  sheet = sheet.concat(data.items.map(function (item) {
    return keys.map(function (key) {
      return getField(item, key);
    });
  }));

  return { data: sheet, name: data.sheetName };
}

function getHeaderRow(header) {
  var keys = [],
    values = [];
  for (var key in header) {
    keys.push(key);
    values.push(header[key]);
  }
  return { keys: keys, values: values };
}

function getField(item, key) {
  if (typeof item === 'undefined') return;

  var parts = key.split('.');
  if (parts.length > 1) {
    item = item[parts[0]];
    key = key.substring(parts[0].length + 1);
    return getField(item, key);
  }

  return item[key];
}