How to make a condition LIKE to check the file name Picked in Flutter?-CodePudding

I'm trying to restore .db file type. Since the FilePickerResult does not support .db extension I got forced to use type: FileType.any and then tried to check the file picked if it has some thing like ['*.db'] or ['%.db'] but it won't work and the condition does not be a true, my code:

                onTap: () async {
                  var databasesPath = await getDatabasesPath();
                  var dbPath = join(databasesPath, 'ledger.db');
                  print('dbPath $dbPath');
                  FilePickerResult? result =
                      await FilePicker.platform.pickFiles(
                    type: FileType.any,
                    //type: FileType.custom,
                    //allowedExtensions: ['db'],
                  );
                  print('result ${result?.names}');
                  if (result != null && result.names == ['*.db']) {
                    File source = File(result.files.single.path!);
                    await source.copy(dbPath);
                    print('Successfully Restored DB');
                  } else {
                    print('Some Error XXXXXXXXXXXXXXXX');
                  }
                },

So I need some thing as Like in SQL to check the name like fileName.db but in flutter with using if (result != null && result.names like ['%.db']).

NOTE: this method works fine without any condition, but I'm afraid that the user can picked any file which not db file so the database will get a crash.

Thank you.

CodePudding user response：

== checks for equality without considering any Regex characters. You can use endsWith instead:

result.names.length == 1 && result.names[0].endsWith('.db')

If you want to use Regex

RegExp exp = RegExp(r'.db');
if (result != null && result.names.length == 1 && exp.hasMatch(result.names[0]))

Note that an extension does not guarantee the contents of the file.