/// <summary>
/// Creates a new empty <see cref="BudgetCollection" /> but does not save it.
/// </summary>
public BudgetCollection CreateNew()
{
var budget = new BudgetModel();
this.currentBudgetCollection = new BudgetCollection(budget);
this.budgetBucketRepository.Initialise(new List <BudgetBucketDto>());
return(this.currentBudgetCollection);
}
public async Task <BudgetCollection> LoadAsync(string storageKey, bool isEncrypted)
{
if (storageKey.IsNothing())
{
throw new ArgumentNullException(nameof(storageKey));
}
this.isEncryptedAtLastAccess = isEncrypted;
var reader = this.readerWriterSelector.SelectReaderWriter(isEncrypted);
if (!reader.FileExists(storageKey))
{
throw new KeyNotFoundException("File not found. " + storageKey);
}
object serialised;
try
{
var xaml = await reader.LoadFromDiskAsync(storageKey); // May return null for some errors.
serialised = Deserialise(xaml);
}
catch (XamlObjectWriterException ex)
{
throw new DataFormatException($"The budget file '{storageKey}' is an invalid format. This is probably due to changes in the code, most likely namespace changes.", ex);
}
catch (EncryptionKeyIncorrectException)
{
throw;
}
catch (Exception ex)
{
throw new DataFormatException("Deserialisation the Budget file failed, an exception was thrown by the Xaml deserialiser, the file format is invalid.", ex);
}
var correctDataFormat = serialised as BudgetCollectionDto;
if (correctDataFormat == null)
{
throw new DataFormatException(
string.Format(CultureInfo.InvariantCulture,
"The file used to store application state ({0}) is not in the correct format. It may have been tampered with.",
storageKey));
}
// Bucket Repository must be initialised first, the budget model incomes/expenses are dependent on the bucket repository.
this.budgetBucketRepository.Initialise(correctDataFormat.Buckets);
var budgetCollection = this.mapper.ToModel(correctDataFormat);
budgetCollection.StorageKey = storageKey;
this.currentBudgetCollection = budgetCollection;
return(budgetCollection);
}
/// <summary>
/// Creates a new instance of the <see cref="BudgetCurrencyContext" /> class.
/// </summary>
/// <param name="budgets">The collection of available budgets loaded.</param>
/// <param name="budget">
/// The currently selected budget. This isn't necessarily the current one compared with today's date.
/// Can be any in the <paramref name="budgets" /> collection.
/// </param>
public BudgetCurrencyContext([NotNull] BudgetCollection budgets, [NotNull] BudgetModel budget)
{
if (budgets == null)
{
throw new ArgumentNullException(nameof(budgets));
}
if (budget == null)
{
throw new ArgumentNullException(nameof(budget));
}
BudgetCollection = budgets;
Model = budget;
if (budgets.IndexOf(budget) < 0)
{
throw new KeyNotFoundException("The given budget is not found in the given collection.");
}
}
public async Task <BudgetCollection> CreateNewAndSaveAsync(string storageKey)
{
if (storageKey.IsNothing())
{
throw new ArgumentNullException(nameof(storageKey));
}
var newBudget = new BudgetModel
{
EffectiveFrom = DateTime.Today,
Name = Path.GetFileNameWithoutExtension(storageKey).Replace('.', ' ')
};
this.currentBudgetCollection = new BudgetCollection(newBudget)
{
StorageKey = storageKey
};
this.budgetBucketRepository.Initialise(new List <BudgetBucketDto>());
await SaveAsync(storageKey, false);
return(this.currentBudgetCollection);
}