grunt-gss/tasks/lib/csv2json.js

Save your Google Spreadsheets as CSV or JSON.

// http://jsfiddle.net/sturtevant/AZFvQ/
// Source: http://www.bennadel.com/blog/1504-Ask-Ben-Parsing-CSV-Strings-With-Javascript-Exec-Regular-Expression-Command.htm
// This will parse a delimited string into an array of
// arrays. The default delimiter is the comma, but this
// can be overriden in the second argument.

function CSVToArray(strData, strDelimiter) {
  // Check to see if the delimiter is defined. If not,
  // then default to comma.
  strDelimiter = (strDelimiter || ",");
  // Create a regular expression to parse the CSV values.
  var objPattern = new RegExp((
  // Delimiters.
  "(\\" + strDelimiter + "|\\r?\\n|\\r|^)" +
  // Quoted fields.
  "(?:\"([^\"]*(?:\"\"[^\"]*)*)\"|" +
  // Standard fields.
  "([^\"\\" + strDelimiter + "\\r\\n]*))"), "gi");
  // Create an array to hold our data. Give the array
  // a default empty first row.
  var arrData = [[]];
  // Create an array to hold our individual pattern
  // matching groups.
  var arrMatches = null;
  // Keep looping over the regular expression matches
  // until we can no longer find a match.
  while (arrMatches = objPattern.exec(strData)) {
    // Get the delimiter that was found.
    var strMatchedDelimiter = arrMatches[1];
    // Check to see if the given delimiter has a length
    // (is not the start of string) and if it matches
    // field delimiter. If id does not, then we know
    // that this delimiter is a row delimiter.
    if (strMatchedDelimiter.length && (strMatchedDelimiter != strDelimiter)) {
      // Since we have reached a new row of data,
      // add an empty row to our data array.
      arrData.push([]);
    }
    // Now that we have our delimiter out of the way,
    // let's check to see which kind of value we
    // captured (quoted or unquoted).
    if (arrMatches[2]) {
      // We found a quoted value. When we capture
      // this value, unescape any double quotes.
      var strMatchedValue = arrMatches[2].replace(
      new RegExp("\"\"", "g"), "\"");
    } else {
      // We found a non-quoted value.
      var strMatchedValue = arrMatches[3];
    }
    // Now that we have our value string, let's add
    // it to the data array.
    arrData[arrData.length - 1].push(strMatchedValue);
  }
  // Return the parsed data.
  return (arrData);
}

function CSV2JSON(csv) {
    var array = CSVToArray(csv);
    var objArray = [];
    for (var i = 1; i < array.length; i++) {
      objArray[i - 1] = {};
      for (var k = 0; k < array[0].length && k < array[i].length; k++) {
        var key = array[0][k];
        objArray[i - 1][key] = array[i][k]
      }
    }

    var json = JSON.stringify(objArray);
    var str = json.replace(/},/g, "},");

    return str;
}

module.exports = CSV2JSON;