/// <summary>
/// Odczytuje stan systemu z pliku o podanej ścieżce.
/// UWAGA: Obecny stan systemu zostanie utracony na rzecz nowego stanu
/// </summary>
/// <param name="filePath">Ścieżka do pliku do odczytania</param>
/// <returns>Zwraca true, jeżeli udało się poprawnie załadować stan systemu, a false, jeżeli wystąpił błąd</returns>
internal bool LoadSystemState(string filePath)
{
Stream fileStream = FileHandling.GetReadingStream(filePath);
if (fileStream == null)
{
throw new NoSuchFileException("Nie znaleziono podanego pliku do czytania", filePath);
}
// Czyszczenie listy banków
bankList.Clear();
// XMLParser (reader)
using (XmlReader reader = XmlReader.Create(fileStream))
{
string currentBankName = null, currentBankId = null;
while (reader.Read())
{
if (reader.NodeType == XmlNodeType.Element && reader.Name == "bank")
{
currentBankName = reader.GetAttribute("name");
currentBankId = reader.GetAttribute("id");
CreateBankIfNotExists(currentBankName, currentBankId);
}
if (reader.NodeType == XmlNodeType.Element && reader.Name == "card")
{
if (reader.HasAttributes)
{
string clientName, clientNumber, cardNumber, cardLimitString;
decimal cardLimit = 0, balance = 0;
bool isActive = false;
ClientType clientType;
CardType cardType;
//TODO: dodać wczytywanie isActive i balance
clientName = reader.GetAttribute("ownerName");
clientNumber = reader.GetAttribute("ownerNumber");
clientType = (ClientType)int.Parse(reader.GetAttribute("ownerType"));
cardNumber = reader.GetAttribute("number");
cardType = (CardType)int.Parse(reader.GetAttribute("cardType"));
cardLimitString = reader.GetAttribute("cardLimit");
isActive = bool.Parse(reader.GetAttribute("isActive"));
balance = decimal.Parse(reader.GetAttribute("balance"));
if (cardLimitString != null)
{
cardLimit = decimal.Parse(cardLimitString);
}
Client owner;
if (clientType == ClientType.NaturalPerson)
{
owner = new NaturalPerson(clientName, clientNumber);
}
else if (clientType == ClientType.ServiceCompany)
{
owner = new ServiceCompany(clientName, clientNumber);
}
else if (clientType == ClientType.Shop)
{
owner = new Shop(clientName, clientNumber);
}
else if (clientType == ClientType.ServiceCompany)
{
owner = new ServiceCompany(clientName, clientNumber);
}
else
{
continue;
}
Card newCard;
if (cardType == CardType.CreditCard)
{
newCard = new CreditCard(cardNumber, owner, isActive, balance, cardLimit);
}
else if (cardType == CardType.DebitCard)
{
newCard = new DebitCard(cardNumber, owner, isActive, balance);
}
else if (cardType == CardType.ATMCard)
{
newCard = new ATMCard(cardNumber, owner, isActive, balance);
}
else
{
continue;
}
CreateBankIfNotExists(currentBankName, currentBankId);
AddNewCardRequest(newCard, int.Parse(currentBankId));
}
}
if (reader.NodeType == XmlNodeType.EndElement && reader.Name == "bank")
{
currentBankName = null;
currentBankId = null;
}
}
}
// ....
return(true);
}
/// <summary>
/// Zapisuje stan systemu w pliku w formacie XML
/// </summary>
/// <param name="filePath">Ścieżka do pliku do zapisania</param>
/// <returns>Zwraca true, jeżeli udało się zapisać bez problemu, a false jeżeli sie nie udało</returns>
internal bool SaveSystemState(string filePath)
{
StringBuilder xmlContent = new StringBuilder();
XmlWriterSettings settings = new XmlWriterSettings
{
Indent = true,
Encoding = new UTF8Encoding(false),
OmitXmlDeclaration = true
};
using (XmlWriter writer = XmlWriter.Create(xmlContent, settings))
{
writer.WriteStartElement("system");
//writer.WriteStartDocument();
// zapisywanie stanu banków
foreach (Bank bank in bankList)
{
string bankName = bank.Name;
int bankId = bank.Id;
if (bankName == null || bankId < 0)
{
continue;
}
writer.WriteStartElement("bank");
writer.WriteAttributeString("name", bankName);
writer.WriteAttributeString("id", bankId.ToString());
foreach (Card card in bank.Cards)
{
string cardNumber = card.Number;
Client cardOwner = card.Owner;
if (cardNumber == null || cardOwner == null)
{
continue;
}
CardType cardType;
if (card is CreditCard)
{
cardType = CardType.CreditCard;
}
else if (card is DebitCard)
{
cardType = CardType.DebitCard;
}
else if (card is ATMCard)
{
cardType = CardType.ATMCard;
}
else
{
continue;
}
writer.WriteStartElement("card");
writer.WriteAttributeString("number", cardNumber);
writer.WriteAttributeString("ownerName", cardOwner.Name);
writer.WriteAttributeString("ownerNumber", cardOwner.Number.ToString());
writer.WriteAttributeString("ownerType", cardOwner.ClientType.ToString("d"));
writer.WriteAttributeString("cardType", cardType.ToString("d"));
writer.WriteAttributeString("isActive", card.IsActive.ToString());
if (card is CreditCard)
{
writer.WriteAttributeString("cardLimit", ((CreditCard)card).CreditLimit.ToString());
}
writer.WriteAttributeString("balance", card.Balance.ToString());
writer.WriteEndElement();
}
writer.WriteEndElement();
}
writer.WriteEndElement();
// zapisywanie stanu archiwum
// .........
// .........
}
return(FileHandling.WriteFile(filePath, xmlContent.ToString(), true));
}
