public async Task DeleteOtherChannelMessages
(
[Summary("The channel on which the the messages to delete are contained.")]
ITextChannel textChannel,
[Summary("The ID of the first message that will be deleted, **inclusive**.")]
ulong firstMessageID,
[Summary("The ID of the last message that will be deleted, **inclusive**.")]
ulong lastMessageID
)
{
var contextChannel = Context.Channel;
if (firstMessageID == 0 || lastMessageID == 0)
{
await contextChannel.SendMessageAsync("The provided message IDs are invalid.");
return;
}
var originalProgressMessage = await contextChannel.SendMessageAsync($"Discovering messages to delete... 0 messages have been found so far.");
var progressMessageTimestamp = originalProgressMessage.Timestamp;
var persistentProgressMessage = new PersistentMessage(originalProgressMessage);
var foundMessages = await textChannel.GetMessageRangeAsync(firstMessageID, lastMessageID, UpdateMessage);
async Task UpdateMessage(int messages)
{
await persistentProgressMessage.SetContentAsync($"Discovering users to delete... {messages} messages have been found so far.");
}
// The progress message's timestamp is being used because it was used with Discord's clock
// Avoiding clock difference issues
var threshold = progressMessageTimestamp.UtcDateTime - TimeSpan.FromDays(14);
foundMessages.Dissect(m => m.Timestamp.UtcDateTime < threshold, out var olderMessages, out var newerMessages);
var newerMessageIDs = newerMessages.Select(m => m.Id).ToArray();
int currentlyDeletedMessages = 0;
bool deletionComplete = false;
await persistentProgressMessage.SetContentAsync($"{foundMessages.Count} messages are being deleted...");
await textChannel.DeleteMessagesAsync(newerMessageIDs);
currentlyDeletedMessages += newerMessageIDs.Length;
deletionComplete = foundMessages.Count == newerMessageIDs.Length;
if (!deletionComplete)
{
var progressMessageUpdatingTask = UpdateProgressMessage();
foreach (var message in olderMessages)
{
await textChannel.DeleteMessageAsync(message);
currentlyDeletedMessages++;
}
deletionComplete = true;
await progressMessageUpdatingTask;
async Task UpdateProgressMessage()
{
while (!deletionComplete)
{
var progressMessageContent = $"{foundMessages.Count} messages are being deleted... {currentlyDeletedMessages} messages have been deleted.";
await persistentProgressMessage.SetContentAsync(progressMessageContent);
await Task.Delay(1000);
}
}
}
await persistentProgressMessage.SetContentAsync($"{foundMessages.Count} messages have been deleted.");
await Task.Delay(5000);
await persistentProgressMessage.DeleteAsync();
}
