/// <summary>
/// On the user's feed, we want to consolidate multiple "Sent gift" notices into a single line item. For example, the following transactions should be consolidated:
/// "jskiles sent a 'Red Rose' gift to justin on Aug 10"
/// "jskiles sent a 'Red Rose' gift to justin on Aug 10"
/// "jskiles sent a 'Red Rose' gift to justin on Aug 10"
/// "jskiles sent a 'White Rose' gift to justin on Aug 10"
///
/// Further, all gifts of the same ID should be summed into a single count. The above would condense to a single line of:
/// "jskiles sent 3x 'Red Rose' gifts and 1x 'White Rose' gift to justin on Aug 10"
/// </summary>
/// <param name="giftTransactions"></param>
/// <returns></returns>
public static IReadOnlyCollection <GiftReceivedFeedViewModel> GetConsolidatedGiftTransactions(this IReadOnlyCollection <GiftReceivedFeedViewModel> giftTransactions)
{
Dictionary <FeedItemKey, GiftReceivedFeedViewModel> consolidatedGiftTransactionViewModels = new Dictionary <FeedItemKey, GiftReceivedFeedViewModel>();
foreach (var giftTransaction in giftTransactions)
{
// the key to identify if a transaction is unique or not depends on the user id and the time since the transaction occurred
FeedItemKey key = GetFeedItemKey(giftTransaction);
GiftReceivedFeedViewModel existingGiftReceivedFeedViewModel = new GiftReceivedFeedViewModel();
bool alreadyExists = consolidatedGiftTransactionViewModels.TryGetValue(key, out existingGiftReceivedFeedViewModel);
if (!alreadyExists)
{
//var newGiftReceivedFeedViewModel = Mapper.Map<GiftTransactionLog, GiftReceivedFeedViewModel>(giftTransaction);
AddGiftReceivedFeedItem(giftTransaction);
consolidatedGiftTransactionViewModels.Add(key, giftTransaction);
}
else
{
GiftReceivedFeedItemViewModel existingGiftReceivedFeedItemViewModel = new GiftReceivedFeedItemViewModel();
alreadyExists = existingGiftReceivedFeedViewModel.Gifts.TryGetValue(giftTransaction.StoreItemId, out existingGiftReceivedFeedItemViewModel);
if (!alreadyExists)
{
AddGiftReceivedFeedItem(giftTransaction);
}
else
{
existingGiftReceivedFeedItemViewModel.GiftSentCount++;
}
}
}
return(consolidatedGiftTransactionViewModels.Values.ToList().AsReadOnly());
}
private static void AddGiftReceivedFeedItem(GiftReceivedFeedViewModel giftReceivedFeedViewModel)
{
giftReceivedFeedViewModel.Gifts.Add(giftReceivedFeedViewModel.StoreItemId, new GiftReceivedFeedItemViewModel()
{
GiftImagePath = giftReceivedFeedViewModel.StoreItemIconPath,
GiftSentCount = giftReceivedFeedViewModel.ItemCount
});
}
private static FeedItemKey GetFeedItemKey(GiftReceivedFeedViewModel giftTransaction)
{
FeedItemKey key = new FeedItemKey()
{
UserId = giftTransaction.SenderUserId,
TimeAgo = giftTransaction.TimeAgo
};
return(key);
}
