// TODO: Clean this up and use an algorithm that is scalable for child items
public async Task UpdateAsync(Notebook item)
{
try
{
SQLiteDatabaseContext context = database.Context;
context.SaveChanges();
Notebook existingNotebook = context.Notebooks
.Where(n => n.ID == item.ID)
.Include(n => n.Stacks)
.SingleOrDefault();
if (existingNotebook == null)
{
throw new Exception($"The notebook with ID { item.ID } could not be found");
}
context.Entry(existingNotebook).CurrentValues.SetValues(item);
// Delete children
foreach (Stack existingStack in existingNotebook.Stacks)
{
if (!item.Stacks.Any(s => s.ID == existingStack.ID))
{
context.Stacks.Remove(existingStack);
}
}
// Update and insert children
foreach (Stack stack in item.Stacks)
{
Stack existingStack = existingNotebook.Stacks
.Where(s => s.ID == stack.ID && s.ID != default)
.SingleOrDefault();
if (existingStack == null)
{
// Insert child
existingNotebook.Stacks.Add(stack);
}
else
{
// Update child
context.Entry(existingStack).CurrentValues.SetValues(stack);
}
await UpdateStackAsync(stack);
}
await context.SaveChangesAsync();
}
catch (Exception e)
{
InformationDispatcher.Default.Dispatch(e); // TODO: Remove
throw new DataSourceException("Could not update notebook", e);
}
}
private async Task UpdateStackAsync(Stack item)
{
try
{
SQLiteDatabaseContext context = database.Context;
Stack existingStack = context.Stacks
.Where(s => s.ID == item.ID)
.Include(s => s.Fields)
.SingleOrDefault();
if (existingStack == null)
{
return;
}
context.Entry(existingStack).CurrentValues.SetValues(item);
// Delete children
foreach (CustomField existingField in existingStack.Fields)
{
if (!item.Fields.Any(f => f.ID == existingField.ID))
{
context.Fields.Remove(existingField);
}
}
// Update and insert children
foreach (CustomField field in item.Fields)
{
CustomField existingField = existingStack.Fields
.Where(f => f.ID == field.ID && f.ID != default)
.SingleOrDefault();
if (existingField == null)
{
// Insert child
existingStack.Fields.Add(field);
}
else
{
// Update child
context.Entry(existingField).CurrentValues.SetValues(field);
}
}
await context.SaveChangesAsync();
}
catch (Exception e)
{
InformationDispatcher.Default.Dispatch(e); // TODO: Remove
throw new DataSourceException("Could not update stack", e);
}
}