public void MoveEntry(int toIndex, string fileName)
{
OrganizerEntry targetEntry = _entries.Find(entry => entry.FileName.Equals(fileName));
if (targetEntry != null)
{
MoveTransaction transaction = new MoveTransaction(this);
int fromIndex = targetEntry.Number;
bool movingDown = toIndex <= fromIndex;
// there is already an entry at the index we are trying to move to, so we need to keep shifting entries
// up until we find a gap between numbers
bool cascadeUp = _entries.Where((entry) => entry.Number == toIndex && entry != targetEntry).Any();
int lowerIndex = movingDown ? toIndex : fromIndex;
int higherIndex = movingDown ? fromIndex : toIndex;
int?lastNumber = null;
IEnumerable <OrganizerEntry> entriesToShift = _entries.Where((entry) => {
if (entry != targetEntry && lowerIndex <= entry.Number)
{
if (!cascadeUp)
{
return(higherIndex >= entry.Number);
}
else
{
if (higherIndex >= entry.Number || (lastNumber != null && (lastNumber == entry.Number - 1 || lastNumber == entry.Number)))
{
lastNumber = entry.Number;
return(true);
}
}
}
return(false);
});
foreach (OrganizerEntry entry in entriesToShift)
{
transaction.AddMoveEntry(entry, entry.Number, entry.Number + (movingDown || entry.Number > higherIndex ? 1 : -1));
}
transaction.AddMoveEntry(targetEntry, targetEntry.Number, toIndex);
transactionHistory.AddAndApplyEntry(transaction);
}
else
{
Console.WriteLine($"Tried to move '{fileName}' to {toIndex}, but the file could not be found.");
}
}
public void DisableEntry(string fileName)
{
OrganizerEntry targetEntry = _entries.Find(entry => entry.FileName.Equals(fileName));
if (targetEntry != null)
{
RemoveTransaction transaction = new RemoveTransaction(this);
transaction.AddRemoveEntry(targetEntry);
transactionHistory.AddAndApplyEntry(transaction);
}
else
{
Console.WriteLine($"Tried to remove '{fileName}', but the file could not be found.");
}
}
public void AddRemoveEntry(OrganizerEntry item)
{
removedEntries.Add(item);
}
public MoveTransactionEntry(OrganizerEntry item, int fromIndex, int toIndex)
{
Item = item;
FromIndex = fromIndex;
ToIndex = toIndex;
}
public void AddMoveEntry(OrganizerEntry item, int fromIndex, int toIndex)
{
entries.Add(new MoveTransactionEntry(item, fromIndex, toIndex));
}