public SpamProbability GetSpamProbability(ServerMessagesCacheService serverMessagesCacheService, Contexts contexts)
{
var userId = contexts.User.Id;
var serverId = contexts.Server.Id;
var lastFewMessages = serverMessagesCacheService.GetLastUserMessages(userId, serverId)
.TakeLast(5)
.ToList();
if (lastFewMessages.Count < 2)
{
return(SpamProbability.None);
}
var percentOfSimilarityToSuspectSpam = this._configurationService.GetConfigurationItem <PercentOfSimilarityBetweenMessagesToSuspectSpam>(serverId).Value;
var content = lastFewMessages.Last().Content;
var similarMessagesCount = lastFewMessages
.SkipLast(1) // because I'm comparing all the other messages to the last message
.Count(x => this.GetDifferencePercent(x.Content, content) < percentOfSimilarityToSuspectSpam);
var isUserSafe = this._userSafetyChecker.IsUserSafe(userId, serverId);
return(similarMessagesCount switch
{
0 => SpamProbability.None,
1 => SpamProbability.Low,
2 when isUserSafe => SpamProbability.Low,
2 => SpamProbability.Medium,
_ when isUserSafe => SpamProbability.Medium,
_ => SpamProbability.Sure
});
public SpamProbability GetSpamProbability(ServerMessagesCacheService serverMessagesCacheService, DiscordRequest request, Contexts contexts)
{
var userId = contexts.User.Id;
var serverId = contexts.Server.Id;
var lastFewMessages = serverMessagesCacheService.GetLastUserMessages(userId, serverId)
.TakeLast(4)
.ToList();
if (lastFewMessages.Count < 2)
{
return(SpamProbability.None);
}
var content = request.OriginalMessage;
var percentOfSimilarityToSuspectSpam = this._configurationService.GetConfigurationItem <PercentOfSimilarityBetweenMessagesToSuspectSpam>(serverId).Value;
var similarMessagesCount = lastFewMessages.Count(x => this.GetDifferencePercent(x.Content, content) < percentOfSimilarityToSuspectSpam);
var isUserSafe = this.UserSafetyChecker.IsUserSafe(userId, serverId);
return(similarMessagesCount switch
{
0 => SpamProbability.None,
1 => SpamProbability.Low,
2 when isUserSafe => SpamProbability.Low,
2 => SpamProbability.Medium,
_ when isUserSafe => SpamProbability.Medium,
_ => SpamProbability.Sure
});
public SpamProbability GetSpamProbability(ServerMessagesCacheService serverMessagesCacheService, Contexts contexts)
{
var content = serverMessagesCacheService.GetLastUserMessages(contexts.User.Id, contexts.Server.Id).Last().Content;
if (!this._linkRegex.IsMatch(content))
{
return(SpamProbability.None);
}
var userId = contexts.User.Id;
var serverId = contexts.Server.Id;
return(this._userSafetyChecker.IsUserSafe(userId, serverId)
? SpamProbability.Low
: SpamProbability.Medium);
}
public SpamProbability GetSpamProbability(ServerMessagesCacheService serverMessagesCacheService, Contexts contexts)
{
var lastFewMessages = serverMessagesCacheService.GetLastUserMessages(contexts.User.Id, contexts.Server.Id)
.TakeLast(7)
.ToList();
if (!this.IsMessageWithMuchCapslock(lastFewMessages.Last().Content, contexts.Server.Id))
{
return(SpamProbability.None);
}
var capslockedMessagesCount = lastFewMessages.Count(x => this.IsMessageWithMuchCapslock(x.Content, contexts.Server.Id));
return(capslockedMessagesCount switch
{
1 => SpamProbability.Low,
2 => SpamProbability.Medium,
_ => SpamProbability.Sure
});
public SpamProbability GetSpamProbability(ServerMessagesCacheService serverMessagesCacheService, Contexts contexts)
{
var howManyMessagesCount = this._configurationService.GetConfigurationItem <HowManyMessagesInShortTimeToBeSpam>(contexts.Server.Id).Value;
var howManySeconds = this._configurationService.GetConfigurationItem <HowLongIsShortTimeInSeconds>(contexts.Server.Id).Value;
var minDate = DateTime.UtcNow.AddSeconds(-howManySeconds);
var messagesCount = serverMessagesCacheService.GetLastUserMessages(contexts.User.Id, contexts.Server.Id)
.TakeLast(howManyMessagesCount)
.Count(x => x.SentAt >= minDate);
if (messagesCount <= howManyMessagesCount / 3)
{
return(SpamProbability.None);
}
var userIsSafe = this._userSafetyChecker.IsUserSafe(contexts.User.Id, contexts.Server.Id);
return(userIsSafe switch //todo: rewrite this switch when we'll switch to c# 9
{
true when messagesCount < howManyMessagesCount => SpamProbability.None,
false when messagesCount <= howManyMessagesCount / 2 => SpamProbability.Low,
false when messagesCount < howManyMessagesCount => SpamProbability.Medium,
_ => SpamProbability.Sure
});
