Export csv or excel file and download not working in ionic even also ionic and alasql

@motiurion wrote:

During some days I faced some problems with ionic export csv in mobile.

I tried with 3 different ways , in browser its working file but in mobile after build not working. What I have done:

Way one:

By creating directive:

`.directive('export', function() {
return {
restrict: 'AE',
scope: {
data: '=exportData',
title: '=exportTitle',
keys: '=exportKeys',
headers: '=exportHeaders',
filename: '=exportFilename'
},
link: function(scope, el, attrs) {
el.bind('click', function() {
var data = scope.data;
var title = scope.title;
var keys = scope.keys;
var headers = scope.headers;
var filename = scope.filename;

            if (data && !Array.isArray(data)) throwError("Data must be a valid javascript array");
            if (keys && !Array.isArray(keys)) throwError("Keys must be a valid javascript array");
            if (headers && !Array.isArray(headers)) throwError("Headers must be a valid javascript array");

            // Remove any angular added keys
            var json_data = angular.toJson(data);
            data = JSON.parse(json_data);
            if (!data.length) throwError("No data available to export");

            // Get keys & headers to be exported
            if (!keys) {
                var sample_data = data[0];
                keys = Object.keys(sample_data);
            }
            if (headers && (headers.length != keys.length)) {
                throwError("Headers must be the same length as the " + (keys ? "keys": "data") + " to export");
            } else if (!headers) {
                headers = convertToUppercase(keys);
            }

            data = filterArrayKeys(data, keys);


            //////////////////////////
            //// Export Functions ////
            //////////////////////////

            var csv = '';
            if (title) {
                csv += title + '\r\n\n';
            }
            csv += headers.join(",") + '\r\n';

            for (var i = 0; i < data.length; i++) {
                var row = "";
                for (var index in data[i]) {
                    row += '"' + data[i][index] + '",';
                }
                row.slice(0, row.length - 1);
                csv += row + '\r\n';
            }

            if (csv == '') {
                throwError("Invalid Data");
            }

            if (!filename) filename = "Export " + getDate();
            filename = filename.replace(/ /g, "_");
            var uri = 'data:text/csv;charset=utf-8,' + escape(csv);
            var link = document.createElement("a");
            link.href = uri;
            link.style = "visibility:hidden";
            link.download = filename + ".csv";

            document.body.appendChild(link);
            link.click();
            document.body.removeChild(link);


            /////////////////////////
            /// Utility Functions ///
            /////////////////////////

            function throwError(message) {
                throw message;
                return;
            }

            function filterArrayKeys(array, keys) {
                var result = [];
                if (!array.length || !keys.length) return result;
                for (var i = 0; i < array.length; i++) {
                    var array_object = array[i];
                    var new_object = {};
                    for (var j = 0; j < keys.length; j++) {
                        var key = keys[j];
                        var value = array_object[key];
                        new_object[key] = value;
                    }
                    result.push(new_object);
                }
                return result;
            };

            function convertToUppercase(array) {
                var result = [];
                for (var i = 0; i < array.length; i++) {
                    var key = array[i];
                    result.push(key.charAt(0).toUpperCase() + key.slice(1));
                }
                return result;
            }

            function getDate() {
                var monthNames = [
                    "January", "February", "March",
                    "April", "May", "June", "July",
                    "August", "September", "October",
                    "November", "December"
                ];

                var date = new Date();
                var day = date.getDate();
                var monthIndex = date.getMonth();
                var year = date.getFullYear();

                return day + ' ' + monthNames[monthIndex] + ' ' + year;
            }
        });
    }
};`

`In HTML:

<table class="table">
<tr ng-repeat="item in demo">
<td>{{item.first_name}}</td>
<td>{{item.last_name}}</td>
<td>{{item.email}}</td>
<td>{{item.company}}</td>
</tr>
</table>
<a class="button button-royal" export export-data="demo">Download</a>
But I check in this way by debug and I found that it's not working link.click();
Way two:
function ConvertToCSV(objArray) {
var array = typeof objArray != 'object' ? JSON.parse(objArray) : objArray;
var str = '';

for (var i = 0; i < array.length; i++) {
    var line = '';
    for (var index in array[i]) {
        if (line != '') line += ','

        line += array[i][index];
    }

    str += line + '\r\n';
}

return str;

}
$ionicPlatform.ready(function() {

$scope.exportCSV = function (data){
console.log(data);
var jsonObject = JSON.stringify(data);
console.log(jsonObject);
var finalCSV = ConvertToCSV(jsonObject);
console.log(finalCSV);

  //alert('cordova.file.dataDirectory: ' + cordova); //I get [object Object]
 //  alert('cordova.file.dataDirectory: ' + cordova.file.dataDirectory); // I get file is undefined
   $cordovaFile.writeFile(cordova.file.externalRootDirectory, 'data.csv', finalCSV, true).then(function(result){
    alert('Success! Export created!');
  }, function(err) {
    console.log("ERROR");
  })

 }

});
It works fine but can't give download functionality cause it's just write a file.

Way three:

ionic with alasql:

alasql('SELECT * INTO CSV("my.csv", {headers:true}) FROM ?',[data]);
Its work well in browser but not in mobile after ionic build or run in mobile.

In ionic, How can actually I can export file from table or JSON to csv format?

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