/// <summary>
/// Saves the given user to the database in a background thread.
/// </summary>
/// <param name="userToSave">The user to save.</param>
/// <returns>The task so this can be run in the background.</returns>
private Task SaveUserAsync(IrcUser userToSave)
{
return(Task.Run(
delegate()
{
lock (this.sqlite)
{
this.sqlite.InsertOrReplace(userToSave);
this.sqlite.Commit();
}
}
));
}
/// <summary>
/// Saves the given user to the database in a background thread.
/// </summary>
/// <param name="userToSave">The user to save.</param>
/// <returns>The task so this can be run in the background.</returns>
private Task SaveUserAsync(IrcUser userToSave)
{
return(Task.Run(
delegate()
{
lock (this.users)
{
if (this.users.Exists(u => u.UserName.Equals(userToSave.UserName)))
{
this.users.Update(userToSave);
}
else
{
this.users.Insert(userToSave);
}
}
}
));
}
// -------- Functions --------
/// <summary>
/// Increases the karma of the given user by 1.
/// </summary>
/// <param name="userName">The user name to increase the karma of.</param>
/// <returns>The new number of karma the user has after incrementing.</returns>
public async Task <int> IncreaseKarma(string userName)
{
userName = userName.ToLower();
IrcUser user = null;
if ((this.ircUserCache.ContainsKey(userName) == false) || (this.ircUserCache[userName].Id == -1))
{
// If our cache does not have the user, or the cache has an invalid ID for the user,
// we need to query it so we have the latest information.
user = await QueryUserAsync(userName);
}
// Otherwise, if our cache has the user, grab it.
else if (this.ircUserCache.ContainsKey(userName))
{
user = this.ircUserCache[userName];
}
// If the user is null, it means it doesn't exist in the database yet; create a new one
if (user == null)
{
user = new IrcUser
{
KarmaCount = 0,
UserName = userName
};
}
// Decrease the karma of the user, but only if it doesn't cause an underflow, otherwise, leave it alone.
if (user.KarmaCount != int.MaxValue)
{
++user.KarmaCount;
}
// Save the user to the database, and by extension, the cache.
await SaveUserAsync(user);
this.ircUserCache[userName] = user;
return(user.KarmaCount);
}
