public async Task <List <ItemPrice> > FetchAllItemPricesFromApi(CancellationToken cancellationToken, int[] filter)
{
var ids = await _gw2ApiClient.FetchAllItemIdsAsync(cancellationToken);
var chunkedItemIds = ids.Where(x => !filter.Contains(x)).Batch(150);
var tasks = chunkedItemIds
.Select(chunk => _gw2ApiClient.FetchItemPricesForIdsAsync(cancellationToken, chunk))
.ToList();
return((await Task.WhenAll(tasks)).SelectMany(x => x).ToList());
}
public async Task UpdatePricesAsync()
{
var items = _context.Items.ToList();
var itemPriceDictionary =
(await Task.WhenAll(items.Batch(150).Select(batch =>
_gw2ApiClient.FetchItemPricesForIdsAsync(CancellationToken.None, batch.Select(x => x.ItemId)))))
.SelectMany(x => x).ToDictionary(x => x.ItemPriceId, x => x);
items.ForEach(x =>
{
x.Buy = itemPriceDictionary[x.ItemId].BuyData.BuyPrice;
x.Sell = itemPriceDictionary[x.ItemId].SellData.SellPrice;
});
//TODO: Unfuck this. needs more thinking. Build hierarchy? Iterate until all updated?
await _context.SaveChangesAsync();
}
