CSV reader

csv-reader.js

function csv(text) {
  var p = '', row = [''], ret = [row], i = 0, r = 0, s = !0, l;
  for (l in text) {
      l = text[l];
      if ('"' === l) {
          if (s && l === p) row[i] += l;
          s = !s;
      } else if (',' === l && s) l = row[++i] = '';
      else if ('\n' === l && s) {
          if ('\r' === p) row[i] = row[i].slice(0, -1);
          row = ret[++r] = [l = '']; i = 0;
      } else row[i] += l;
      p = l;
  }
  return ret;
};


 $("#fileImportInput").on('change', function(changeEvent) {
    $scope.$apply(function () {
        $scope.rows = [];
        $scope.objReps = [];
        $scope.headers = [];
    });

    const files = changeEvent.target.files;
    if (files.length) {
        const r = new FileReader();
        r.onload = function(e) {
            const contents = e.target.result;
            $scope.$apply(function () {
                const rows = csv(contents) || [];
                const headers = rows.shift();
                $scope.headers = headers;
                $scope.objReps = [];
                if (headers && headers.length > 0) {
                    $scope.rows = rows.map(function (row) {
                        const newRow = new Array(headers.length);
                        const objRep = { };
                        for (var i = 0; i < row.length; ++i) {
                            newRow[i] = row[i];
                            if (newRow[i]  && newRow[i] !== "") {
                                objRep[headers[i]] = newRow[i];
                            }
                        }
                        $scope.objReps.push(objRep);
                        return newRow;
                    });
                }
            });
        };

        r.readAsText(files[0]);
    }
});