public async Task CheckMessage(IMessage message, ICommandContext context = null)
{
if (message.Author.IsBot || message.Channel is not IGuildChannel chnl || message is not IUserMessage userMessage || string.IsNullOrWhiteSpace(message.Content))
{
return; //Makes sure it's not logging a message from a bot and that it's in a discord server
}
context ??= new SocketCommandContext((DiscordSocketClient)client, (SocketUserMessage)message);
var gUser = message.Author as IGuildUser;
if (gUser?.Guild == null || gUser.HasAdmin())
{
return;
}
IGuild guild = chnl.Guild;
try
{
var modSettings = guild.LoadFromFile <ModerationSettings>();
var filterSettings = guild.LoadFromFile <FilterSettings>();
List <BadWord> badWords = guild.LoadFromFile <BadWordList>()?.badWords;
string msgContent = message.Content;
if (modSettings != null && filterSettings != null)
{
if (filterSettings.channelsWithoutAutoMod != null && filterSettings.channelsWithoutAutoMod.Contains(chnl.Id) || //If channel has filter disabled
filterSettings.filterIgnored != null && filterSettings.filterIgnored.Intersect(gUser.RoleIds).Any()) //If user has filter ignored role
{
return;
}
//Checks if a message contains too many "newlines"
if (filterSettings.maxNewLines != null)
{
//Gets number of "newlines"
int newLines = context.Message.Content.Count(c => c == '\n');
if (newLines > filterSettings.maxNewLines.Value)
{
await context.FilterPunish("too many newlines", modSettings, filterSettings, null, warnSize : (newLines - filterSettings.maxNewLines.Value) * 0.5f);
return;
}
}
//Checks if a message contains an invite
if (!filterSettings.invitesAllowed)
{
MatchCollection matches = Regex.Matches(message.Content, inviteRegex, regexOptions);
foreach (Match match in matches)
{
var invite = await client.GetInviteAsync(match.Value);
if (invite?.GuildId != null && !filterSettings.whitelistedForInvite.Contains(invite.GuildId.Value))
{
await context.FilterPunish("Posted Invite", modSettings, filterSettings, match.Value, match.Index);
return;
}
}
}
//Checks if a message contains ugly, unwanted text t̨̠̱̭͓̠ͪ̈́͌ͪͮ̐͒h̲̱̯̀͂̔̆̌͊ͅà̸̻͌̍̍ͅt͕̖̦͂̎͂̂ͮ͜ ̲͈̥͒ͣ͗̚l̬͚̺͚͎̆͜ͅo͔̯̖͙ͩõ̲̗̎͆͜k̦̭̮̺ͮ͆̀ ͙̍̂͘l̡̮̱̤͍̜̲͙̓̌̐͐͂̓i͙̬ͫ̀̒͑̔͐k̯͇̀ͭe̎͋̓́ ̥͖̼̬ͪ̆ṫ͏͕̳̞̯h̛̼͔ͩ̑̿͑i͍̲̽ͮͪsͦ͋ͦ̌͗ͭ̋
//Props to Mathias Bynens for the regex string
const string zalgoRegex = @"([\0-\u02FF\u0370-\u1AAF\u1B00-\u1DBF\u1E00-\u20CF\u2100-\uD7FF\uE000-\uFE1F\uFE30-\uFFFF]|[\uD800-\uDBFF][\uDC00-\uDFFF]|[\uD800-\uDBFF](?![\uDC00-\uDFFF])|(?:[^\uD800-\uDBFF]|^)[\uDC00-\uDFFF])([\u0300-\u036F\u1AB0-\u1AFF\u1DC0-\u1DFF\u20D0-\u20FF\uFE20-\uFE2F]+)";
if (filterSettings.zalgoAllowed == false)
{
MatchCollection matches = Regex.Matches(message.Content, zalgoRegex, regexOptions);
if (matches.Any())
{
await context.FilterPunish("zalgo usage", modSettings, filterSettings, null);
return;
}
}
//Check for links if setting enabled and user is not allowed to link
if (filterSettings.allowedLinks?.Count is not null and not 0 && (filterSettings.allowedToLink == null || !gUser.RoleIds.Intersect(filterSettings.allowedToLink).Any()))
{
const string linkRegex = @"((?:https?|steam):\/\/[^\s<]+[^<.,:;" + "\"\'\\]\\s])";
MatchCollection linkMatches = Regex.Matches(message.Content, linkRegex, regexOptions);
//if (matches != null && matches.Count > 0) await new LogMessage(LogSeverity.Info, "Filter", "Link detected").Log();
foreach (Match match in linkMatches)
{
if (msgContent.Equals(match.Value, StringComparison.InvariantCultureIgnoreCase))
{
return;
}
msgContent = msgContent.Replace(match.Value, "", StringComparison.InvariantCultureIgnoreCase);
//Checks for links
if (!filterSettings.allowedLinks.Any(s => match.Value.Contains(s, StringComparison.InvariantCultureIgnoreCase)))
{
await context.FilterPunish("Using unauthorized links", modSettings, filterSettings, match.Value, match.Index, warnSize : 1);
return;
}
}
}
//Check for emojis
if (filterSettings.badUEmojis?.Count is not null and not 0 && filterSettings.badUEmojis.Any(s => message.Content.Contains(s)))
{
await context.FilterPunish("Bad emoji used", modSettings, filterSettings, null, warnSize : 0.8f);
return;
}
if (filterSettings.allowedCaps > 0 && message.Content.Length > 5)
{
uint amountCaps = 0;
foreach (char c in message.Content)
{
if (char.IsUpper(c))
{
amountCaps++;
}
}
if (((amountCaps / (float)message.Content.Length) * 100) >= filterSettings.allowedCaps)
{
await context.FilterPunish("Excessive caps", modSettings, filterSettings, null, warnSize : 0.3f);
return;
}
}
} //End of stuff from mod settings
var result = msgContent.CheckForBadWords(badWords?.ToArray());
var detectedBadWord = result.word;
if (detectedBadWord != null)
{
if (!string.IsNullOrEmpty(detectedBadWord.Euphemism))
{
await context.FilterPunish($"Bad word used ({detectedBadWord.Euphemism})", modSettings, filterSettings, detectedBadWord.Word, result.pos, detectedBadWord.Size);
return;
}
else
{
await context.FilterPunish("Bad word used", modSettings, filterSettings, detectedBadWord.Word, result.pos, detectedBadWord.Size);
return;
}
}
}
catch (Exception e)
{
#if DEBUG
throw;
#else
await e.LogFilterError("message", guild);
#endif
}
}