/// <summary>
/// Store the avatar hash for the given jid in the database
/// </summary>
/// <param name="from"></param>
/// <param name="hash"></param>
private void StoreUserAvatar(Jid from, string hash)
{
if (userAvatarStorage.GetUserAvatar(from) == null)
{
// no records for Jid => store new record
userAvatarStorage.AddUserAvatar(from, hash);
}
else
{
if (userAvatarStorage.GetUserAvatar(from).Hash != hash)
{
// records exists, but with a different hash => update
userAvatarStorage.ReplaceUserAvatar(from, hash);
}
}
}
public async Task RequestRosterAsync()
{
var rosterIq = await xmppClient.RequestRosterAsync();
var rosterItems
= rosterIq
.Query
.Cast <Roster>()
.GetRoster();
await Observable.Start(() =>
{
foreach (var ri in rosterItems)
{
var contact = mapper.Map <Contact>(ri);
if (userAvatarStorage.HasUserAvatar(contact.Jid))
{
var hash = userAvatarStorage.GetUserAvatar(contact.Jid).Hash;
contact.AvatarBytes = avatarStorage.GetAvatar(hash)?.ImageBytes;
}
contacts.AddOrReplace(contact, c => c.Jid == contact.Jid);
}
}, RxApp.MainThreadScheduler);
}