Filereader read file using correct encoding when read as readAsArrayBuffer

Question

I am working on reading .csv /xlsx file uploaded using javaScript and get the result as array containing each row . I was able to read the file and get data us

Answer 1

After going through lot of possible solutions i found that answer to the above question was to combine the above two methods. The first method for reading the xlsx files and second method for reading csv files. Also i have used an additional javaScript library called papaparse in the second method to solve the problem of reading data in each cell

$scope.is_Hebrew = function($data){
var position = $data.search(/[\u0590-\u05FF]/);
return position >= 0;
}

// code for the new excel reader
$scope.do_file =  function(files)
{
    var config = {
    delimiter: "",  // auto-detect
    newline: "",    // auto-detect
    quoteChar: '"',
    escapeChar: '"',
    header: false,
    trimHeader: false,
    dynamicTyping: false,
    preview: 0,
    encoding: "",
    worker: false,
    comments: false,
    step: undefined,
    complete: undefined,
    error: undefined,
    download: false,
    skipEmptyLines: false,
    chunk: undefined,
    fastMode: undefined,
    beforeFirstChunk: undefined,
    withCredentials: undefined
    };

    $scope.fileContent  = [];
    var f = files[0];
    var fileExtension = f.name.replace(/^.*\./, '');
    if(fileExtension == 'xlsx')
    {
        var X = XLSX;
        var global_wb;
        var reader = new FileReader();
        reader.onload = function(e)
        {
            var data = e.target.result;
            global_wb = X.read(data, {type: 'array'});
            var result = {};
            global_wb.SheetNames.forEach(function(sheetName) {
               var roa = X.utils.sheet_to_json(global_wb.Sheets[sheetName], {header:1});
               if(roa.length) result[sheetName] = roa;
            });
            $scope.fileContent =  result["Sheet1"];
            if(!result["Sheet1"])
            {
               $scope.fileContent =  result["contacts"].filter(function(el) { return typeof el != "object" || Array.isArray(el) || Object.keys(el).length > 0; });
            }

        };
        reader.readAsArrayBuffer(f);

    }
    else if(fileExtension == 'csv')
    {
    var reader = new FileReader();
    reader.onload = function(e)
    {
        var data = e.target.result;
        console.log(f);
        console.log($scope.is_Hebrew(data.toString()));
        if(!$scope.is_Hebrew(data.toString()))
        {
           reader.readAsText(f,'ISO-8859-8');   
        }
    };

    reader.readAsText(f);
    reader.onloadend = function(e){
        var c =  Papa.parse(reader.result,[ config])
        console.log(c);
        $scope.fileContent =  c["data"].filter(function(el) { return typeof el != "object" || Array.isArray(el) || Object.keys(el).length > 0; });

    };

    }
    else
    {
       alert("File Not supported!");
    }

$scope.fileContent.push([]);
};