Do a for each loop in a folder in flutter - flutter

Question

I have a folder with csv files. For now I have to go manually and write manually each file. Is it somehow to get all the files and do a for loop? This is the current code I have and thank you so much!
static List<Widget> getPlates(String file) {
List<Widget> listWidgets = [];
loadAsset('assets/$file.csv').then((dynamic output) {
List<String> list = output.split('\n');
for (int i = 1; i < list.length - 1; i++) {
List<String> sublist = list[i].split(';');
listWidgets.add(CardPlate(
name: sublist[0],
ingredients: sublist[1],
price: sublist[2],
));
}
});
return listWidgets;
}
static Future<String> loadAsset(String path) async {
return await rootBundle.loadString(path);
}

Answer 1

Are you talking something like this, or even more indepth?
output.split('\n').forEach((String entry) {
List<String> sublist = entry.split(';');
listWidgets.add(CardPlate(
name: sublist[0],
ingredients: sublist[1],
price: sublist[2],
));
})

Answer 2

import 'dart:convert';
static final reg = RegExp(r'assets/\w+\.csv'); //check for all files within assets, not including subfolders
static List<Widget> getPlater() async{
List<Widget> listWidgets = [];
var myAssets = await rootBundle.loadString('AssetManifest.json'); //file generated by flutter which you can read up through the default bundle
Map<String, dynamic> map = json.decode(myAssets);
map.removeWhere((key, value) => !key.contains(reg)); //remove all keys that aren't csv files
for(String path in map.keys){
var output = await rootBundle.loadString(path);
List<String> list = output.split('\n');
for (int i = 1; i < list.length - 1; i++) {
List<String> sublist = list[i].split(';');
listWidgets.add(CardPlate(
name: sublist[0],
ingredients: sublist[1],
price: sublist[2],
));
}
}
return listWidgets;
}