public async Task AddAsync(RiftActiveGiveaway giveaway)
{
await using var context = new RiftContext();
await context.ActiveGiveaways.AddAsync(giveaway);
await context.SaveChangesAsync();
}
public async Task RemoveAsync(int id)
{
var giveaway = new RiftActiveGiveaway
{
Id = id
};
await using var context = new RiftContext();
context.ActiveGiveaways.Remove(giveaway);
await context.SaveChangesAsync();
}
async Task FinishGiveawayAsync(RiftActiveGiveaway expiredGiveaway)
{
var dbGiveaway = await DB.Giveaways.GetAsync(expiredGiveaway.GiveawayName);
var giveawayData = $"ID {expiredGiveaway.Id.ToString()} \"{expiredGiveaway.GiveawayName}\"";
if (dbGiveaway is null)
{
RiftBot.Log.Error($"Could not finish giveaway {giveawayData}: {nameof(RiftGiveaway)} is null!");
return;
}
if (!IonicHelper.GetTextChannel(Settings.App.MainGuildId, Settings.ChannelId.Chat, out var channel))
{
RiftBot.Log.Error($"Could not finish giveaway {giveawayData}: Giveaway channel is null!");
return;
}
var message = (IUserMessage)await channel.GetMessageAsync(expiredGiveaway.ChannelMessageId);
if (message is null)
{
RiftBot.Log.Error($"Could not finish giveaway {giveawayData}: Giveaway message is null! Deleted?");
return;
}
if (!IonicHelper.GetEmote(403616665603932162, "giveaway", out var emote))
{
RiftBot.Log.Error($"Could not finish giveaway {giveawayData}: Emote is null! Deleted?");
return;
}
// Reaction amount is limited by discord itself.
// See https://discordapp.com/developers/docs/resources/channel#get-reactions
var reactions = await message.GetReactionUsersAsync(emote, 100).FlattenAsync();
if (reactions is null)
{
RiftBot.Log.Error($"Could not finish giveaway {giveawayData}: Unable to get reactions.");
return;
}
var dbReward = await DB.Rewards.GetAsync(dbGiveaway.RewardId);
if (dbReward is null)
{
RiftBot.Log.Error($"Could not finish giveaway {giveawayData}: " +
$"Unable to get reward ID {dbGiveaway.RewardId.ToString()}.");
return;
}
var reward = dbReward.ToRewardBase();
var participants = reactions
.Where(x => !x.IsBot && x.Id != IonicHelper.Client.CurrentUser.Id)
.Select(x => x.Id)
.ToArray();
if (participants.Length == 0)
{
await LogGiveawayAsync(dbGiveaway.Name, null, null,
"No reward provided", expiredGiveaway.StartedBy, expiredGiveaway.StartedAt,
dbGiveaway.Duration);
await DB.ActiveGiveaways.RemoveAsync(expiredGiveaway.Id);
RiftBot.Log.Error($"Could not finish giveaway {giveawayData}: No participants.");
return;
}
var winners = new ulong[dbGiveaway.WinnersAmount];
if (participants.Length < dbGiveaway.WinnersAmount)
{
RiftBot.Log.Error($"Could not finish giveaway {giveawayData}: " +
$"Not enough participants: only {participants.Length.ToString()} of minimum {dbGiveaway.WinnersAmount.ToString()}");
return;
}
if (participants.Length == dbGiveaway.WinnersAmount)
{
Array.Copy(participants, winners, dbGiveaway.WinnersAmount);
}
else
{
ulong winnerId;
for (var i = 0; i < dbGiveaway.WinnersAmount; i++)
{
do
{
winnerId = participants.Random();
} while (winners.Contains(winnerId));
winners[i] = winnerId;
}
}
foreach (var winner in winners)
{
await rewardService.DeliverToAsync(winner, reward);
}
await DB.ActiveGiveaways.RemoveAsync(expiredGiveaway.Id);
foreach (var participant in participants)
{
GiveawaysParticipated?.Invoke(null, new GiveawaysParticipatedEventArgs(participant));
}
var log = new RiftGiveawayLog
{
Name = dbGiveaway.Name,
Winners = winners,
Participants = participants,
Reward = "No reward provided",
StartedBy = expiredGiveaway.StartedBy,
StartedAt = expiredGiveaway.StartedAt,
Duration = dbGiveaway.Duration,
FinishedAt = DateTime.UtcNow,
};
await messageService.SendMessageAsync("giveaway-finished", Settings.ChannelId.Chat,
new FormatData(expiredGiveaway.StartedBy)
{
Giveaway = new GiveawayData
{
Log = log,
Stored = dbGiveaway,
},
Reward = reward
});
await LogGiveawayAsync(log).ConfigureAwait(false);
}
public async Task StartGiveawayAsync(string name, ulong startedById)
{
if (string.IsNullOrWhiteSpace(name))
{
RiftBot.Log.Warning("Empty giveaway name, skipping execution.");
return;
}
var giveaway = await DB.Giveaways.GetAsync(name);
if (giveaway is null)
{
RiftBot.Log.Warning("Wrong giveaway name, skipping execution.");
return;
}
var msg = await messageService.GetMessageFromApi(giveaway.MessageId);
if (msg is null)
{
RiftBot.Log.Warning("Wrong giveaway message ID, skipping execution.");
return;
}
var dbReward = await DB.Rewards.GetAsync(giveaway.RewardId);
if (dbReward is null)
{
RiftBot.Log.Warning("Wrong giveaway reward ID, skipping execution.");
return;
}
var reward = dbReward.ToRewardBase();
if (!IonicHelper.GetEmote(403616665603932162, "giveaway", out var smite))
{
RiftBot.Log.Warning("No giveaway emote, skipping execution.");
return;
}
var activeGiveaway = new RiftActiveGiveaway
{
GiveawayName = giveaway.Name,
MessageId = giveaway.MessageId,
StartedBy = startedById == 0u ? IonicHelper.Client.CurrentUser.Id : startedById,
StartedAt = DateTime.UtcNow,
DueTime = DateTime.UtcNow + giveaway.Duration,
};
var formattedMsg = await messageService.FormatMessageAsync(
msg, new FormatData(startedById)
{
Giveaway = new GiveawayData
{
Stored = giveaway
},
Reward = reward
});
var giveawayMessage = await messageService.SendMessageAsync(formattedMsg, Settings.ChannelId.Chat).ConfigureAwait(false);
activeGiveaway.ChannelMessageId = giveawayMessage.Id;
await DB.ActiveGiveaways.AddAsync(activeGiveaway).ConfigureAwait(false);
await giveawayMessage.AddReactionAsync(smite);
await ScheduleTimerToClosest().ConfigureAwait(false);
}