protected override async Task OnLoad(AsyncLoadContext context)
{
Dictionary <ulong, DirectMessage> userMap = new Dictionary <ulong, DirectMessage>();
var cachedMessages = await Cache.GetMessages();
foreach (var c in cachedMessages)
{
var userId = c.Sender == Context.UserId
? c.Recipient
: c.Sender;
var msg = JsonConvert.DeserializeObject <DirectMessage>(c.Data);
DirectMessage existing;
if (userMap.TryGetValue(userId, out existing))
{
if (existing.CreatedAt < msg.CreatedAt)
{
userMap[userId] = msg;
}
}
else
{
userMap.Add(userId, msg);
}
}
var messages = await Context.Twitter.Messages.IncomingMessages(200, MaxId);
foreach (var msg in messages)
{
var userId = msg.SenderID;
DirectMessage existing;
if (userMap.TryGetValue(userId, out existing))
{
if (existing.CreatedAt < msg.CreatedAt)
{
userMap[userId] = msg;
}
}
else
{
userMap.Add(userId, msg);
}
}
var toCache = new List <MessageCacheEntry>();
toCache.AddRange(messages.Select(m => new MessageCacheEntry(m)));
messages = await Context.Twitter.Messages.OutgoingMessages(200, MaxId);
foreach (var msg in messages)
{
var userId = msg.RecipientID;
DirectMessage existing;
if (userMap.TryGetValue(userId, out existing))
{
if (existing.CreatedAt < msg.CreatedAt)
{
userMap[userId] = msg;
}
}
else
{
userMap.Add(userId, msg);
}
}
toCache.AddRange(messages.Select(m => new MessageCacheEntry(m)));
await Cache.AddMessages(toCache);
var list = new List <MessageViewModel>();
foreach (var s in userMap.Values.OrderByDescending(m => m.CreatedAt))
{
var vm = await CreateViewModel(s);
vm.WasRead = true;
list.Add(vm);
}
await AddItems(list);
}