public async Task <CoreDataItem> CreateItemAsync(CoreDataItem item)
{
_context.CoreDataItems.Add(item);
await _context.SaveChangesAsync();
return(await GetItemAsync(item.Id));
}
public async Task CreateOrMergeItemAsync(ShoppingListItem item)
{
ShoppingListItem itemOnList = await GetItemByNameAsync(item.OwnerId, item.Name);
// check if items could be merged
if (itemOnList != null && (ValueUnit.TryParse(itemOnList.Quantity, out ValueUnit onlistValue) && ValueUnit.TryParse(item.Quantity, out ValueUnit coreDataValue)))
{
// merge items
ValueUnit newValueUnit = ValueUnit.Add(onlistValue, coreDataValue);
itemOnList.Quantity = newValueUnit.ToString();
}
else
{
// create new item
_context.ShoppingListItems.Add(item);
}
await _context.SaveChangesAsync();
}