isFolderAliasValid function
Implementation
void isFolderAliasValid(String str) {
if (str.isEmpty) {
throw Exception('alias can\'t be empty');
}
String specialChars = '/=?& ';
var chars = specialChars.split('');
for (var i = 0; i < chars.length; i++) {
var char = chars[i];
if (str.contains(char)) {
throw Exception(
'folder alias can\'t contain special chars from $specialChars');
}
}
}