public ParseResult<Person> ParseFile(string filePath, char delimiter)
{
//Opens the file
var parseResult = new ParseResult<Person>();
var reader = File.OpenText(filePath);
var line = "";
//Reads each line
while ((line = reader.ReadLine()) != null)
{
//Creates an array based on our delimiter
var fieldArray = line.Split(delimiter);
//Maps the array to a concrete object
var personFromFile = new Person
{
LastName = fieldArray[0],
FirstName = fieldArray[1],
Birthday = DateTime.Parse(fieldArray[2])
};
//Perform some validation (method below)
var validationResult = ValidatePerson(personFromFile, line);
AddValidObjectOrParseErrorToResults(validationResult, parseResult, personFromFile, line);
}
return parseResult;
}
//The validation logic from above
private static ValidationResult ValidatePerson(Person personFromFile, string line)
{
var validationResult = new ValidationResult();
if (!Regex.IsMatch(personFromFile.FirstName, @"^[a-zA-z]+$"))
{
validationResult.AddParseError(new ParseError("FirstName can only contain alpha characters", line));
}
if (!Regex.IsMatch(personFromFile.LastName, @"^[a-zA-z]+$"))
{
validationResult.AddParseError(new ParseError("LastName can only contain alpha characters", line));
}
return validationResult;
}
private static void AddValidObjectOrParseErrorToResults(ValidationResult validationResult, ParseResult<Person> parseResult,
Person personToAdd, string line)
{
if (validationResult.IsValid)
{
parseResult.AddParsedRecordToCollection(personToAdd);
}
else
{
foreach (var errorMessage in validationResult.GetErrorMessages())
{
parseResult.AddParsedErrorToCollection(errorMessage, line);
}
}
}