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feat(chat-filter): the server filters phrases in normal chat both ways

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The client's word check before sending is a light one; the server is the full filter. In normal (whitelist) chat, block list phrases are now stopped even when each word is allowed, and allowed phrases (from the dashboard or a line with spaces in the allowed words file) let their words through together. The dashboard can allow phrases and its message test explains both.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Aaron Kimbrell
2026-09-30 08:27:14 -05:00
parent 0f8c762122
commit 1657ca006d
8 changed files with 120 additions and 31 deletions
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13
dDashboardServer/routes/ModerationTools.cpp
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@@ -305,17 +305,14 @@ namespace {
});
Route(eHTTPMethod::POST, "/api/chat_filter/words", Perm("chat_filter_manage"),
"Allow or block a word, or block a phrase (or move it to the other list); running worlds pick it up at once. Phrases can't be allowed: "
"whitelist chat checks each word on its own, as the client does. Body: {word, allowed: bool}",
"Allow or block a word or phrase (or move it to the other list); running worlds pick it up at once. An allowed phrase lets its words "
"through together in normal chat. Body: {word, allowed: bool}",
[](HTTPReply& reply, const HTTPContext& context) {
const auto body = ParseBody(context);
if (!body) return JsonError(reply, eHTTPStatusCode::BAD_REQUEST, "Invalid JSON");
const auto word = ModerationTools::FilterWord(body->value("word", ""));
if (!word) return JsonError(reply, eHTTPStatusCode::BAD_REQUEST, "Type a word or phrase, up to 64 characters");
const bool allowed = body->value("allowed", false);
if (allowed && ModerationTools::IsPhrase(*word)) {
return JsonError(reply, eHTTPStatusCode::BAD_REQUEST, "Phrases can only be blocked: normal chat checks each word on its own, so allow the words instead");
}
Database::Get()->SetChatFilterWord({ *word, allowed, context.authenticatedUser, static_cast<int64_t>(std::time(nullptr)) });
Audit(context, allowed ? "chat_filter_allow" : "chat_filter_block", (allowed ? "Allowed \"" : "Blocked \"") + *word + "\" in chat");
BroadcastTableChanged("chat_filter");
@@ -365,7 +362,11 @@ namespace {
sources.blockFile = [&blocked](const std::string& entry) { return blocked.list.Contains(entry); };
sources.blockFileLoaded = !blocked.list.Empty();
sources.maxWords = blocked.list.maxWords;
for (const auto& [entry, allowed] : dashboard) if (!allowed) sources.maxWords = std::max(sources.maxWords, ChatFilterWords::WordCount(entry));
for (const auto& [entry, allowed] : dashboard) {
auto& longest = allowed ? sources.maxAllowedWords : sources.maxWords;
longest = std::max(longest, ChatFilterWords::WordCount(entry));
}
for (const auto& entry : all) sources.maxAllowedWords = std::max(sources.maxAllowedWords, ChatFilterWords::WordCount(entry));
nlohmann::json words = nlohmann::json::array();
bool stopped = false;
for (const auto& verdict : ModerationTools::ExplainMessage(message, allowList, sources)) {