From a8810ad0164615787807f547124f7b2a8cbb556f Mon Sep 17 00:00:00 2001
From: Marcel <MTRNord@users.noreply.github.com>
Date: Sun, 10 Apr 2022 22:44:15 +0200
Subject: [PATCH] Add specific powerlevel messages (#852)
fixes #136
---
src/timeline/TimelineModel.cpp | 265 ++++++++++++++++++++++++++++++++-
1 file changed, 261 insertions(+), 4 deletions(-)
diff --git a/src/timeline/TimelineModel.cpp b/src/timeline/TimelineModel.cpp
index 3dd51112e..070d226f2 100644
--- a/src/timeline/TimelineModel.cpp
+++ b/src/timeline/TimelineModel.cpp
@@ -1934,11 +1934,268 @@ TimelineModel::formatPowerLevelEvent(const QString &id)
if (!event)
return QString();
- QString user = QString::fromStdString(event->sender);
- QString name = utils::replaceEmoji(displayName(user));
+ mtx::events::StateEvent<mtx::events::state::PowerLevels> *prevEvent = nullptr;
+ if (!event->unsigned_data.replaces_state.empty()) {
+ auto tempPrevEvent = events.get(event->unsigned_data.replaces_state, event->event_id);
+ if (tempPrevEvent) {
+ prevEvent =
+ std::get_if<mtx::events::StateEvent<mtx::events::state::PowerLevels>>(tempPrevEvent);
+ }
+ }
- // TODO: power levels rendering is actually a bit complex. work on this later.
- return tr("%1 has changed the room's permissions.").arg(name);
+ QString user = QString::fromStdString(event->sender);
+ QString sender_name = utils::replaceEmoji(displayName(user));
+ // Get the rooms levels for redactions and powerlevel changes to determine "Administrator" and
+ // "Moderator" powerlevels.
+ auto administrator_power_level = event->content.state_level("m.room.power_levels");
+ auto moderator_power_level = event->content.redact;
+ auto default_powerlevel = event->content.users_default;
+ if (!prevEvent)
+ return tr("%1 has changed the room's permissions.").arg(sender_name);
+
+ auto calc_affected = [&event,
+ &prevEvent](int64_t newPowerlevelSetting) -> std::pair<QStringList, int> {
+ QStringList affected{};
+ auto numberOfAffected = 0;
+ // We do only compare to people with explicit PL. Usually others are not going to be
+ // affected either way and this is cheaper to iterate over.
+ for (auto const &[mxid, currentPowerlevel] : event->content.users) {
+ if (currentPowerlevel == newPowerlevelSetting &&
+ prevEvent->content.user_level(mxid) < newPowerlevelSetting) {
+ numberOfAffected++;
+ if (numberOfAffected <= 2) {
+ affected.push_back(QString::fromStdString(mxid));
+ }
+ }
+ }
+ return {affected, numberOfAffected};
+ };
+
+ QStringList resultingMessage{};
+ // These affect only a few people. Therefor we can print who is affected.
+ if (event->content.kick != prevEvent->content.kick) {
+ auto default_message = tr("%1 has changed the room's kick powerlevel from %2 to %3.")
+ .arg(sender_name)
+ .arg(prevEvent->content.kick)
+ .arg(event->content.kick);
+
+ // We only calculate affected users if we change to a level above the default users PL
+ // to not accidentally have a DoS vector
+ if (event->content.kick > default_powerlevel) {
+ auto [affected, number_of_affected] = calc_affected(event->content.kick);
+
+ if (number_of_affected != 0) {
+ auto true_affected_rest = number_of_affected - affected.size();
+ if (number_of_affected > 1) {
+ resultingMessage.append(
+ default_message + QStringLiteral(" ") +
+ tr("%n member(s) can now kick room members.", nullptr, true_affected_rest));
+ } else if (number_of_affected == 1) {
+ resultingMessage.append(
+ default_message + QStringLiteral(" ") +
+ tr("%1 can now kick room members.")
+ .arg(utils::replaceEmoji(displayName(affected.at(0)))));
+ }
+ } else {
+ resultingMessage.append(default_message);
+ }
+ } else {
+ resultingMessage.append(default_message);
+ }
+ }
+
+ if (event->content.redact != prevEvent->content.redact) {
+ auto default_message = tr("%1 has changed the room's redact powerlevel from %2 to %3.")
+ .arg(sender_name)
+ .arg(prevEvent->content.redact)
+ .arg(event->content.redact);
+
+ // We only calculate affected users if we change to a level above the default users PL
+ // to not accidentally have a DoS vector
+ if (event->content.redact > default_powerlevel) {
+ auto [affected, number_of_affected] = calc_affected(event->content.redact);
+
+ if (number_of_affected != 0) {
+ auto true_affected_rest = number_of_affected - affected.size();
+ if (number_of_affected > 1) {
+ resultingMessage.append(
+ default_message + QStringLiteral(" ") +
+ tr("%n member(s) can now redact room messages.", nullptr, true_affected_rest));
+ } else if (number_of_affected == 1) {
+ resultingMessage.append(
+ default_message + QStringLiteral(" ") +
+ tr("%1 can now redact room messages.")
+ .arg(utils::replaceEmoji(displayName(affected.at(0)))));
+ }
+ } else {
+ resultingMessage.append(default_message);
+ }
+ } else {
+ resultingMessage.append(default_message);
+ }
+ }
+
+ if (event->content.ban != prevEvent->content.ban) {
+ auto default_message = tr("%1 has changed the room's ban powerlevel from %2 to %3.")
+ .arg(sender_name)
+ .arg(prevEvent->content.ban)
+ .arg(event->content.ban);
+
+ // We only calculate affected users if we change to a level above the default users PL
+ // to not accidentally have a DoS vector
+ if (event->content.ban > default_powerlevel) {
+ auto [affected, number_of_affected] = calc_affected(event->content.ban);
+
+ if (number_of_affected != 0) {
+ auto true_affected_rest = number_of_affected - affected.size();
+ if (number_of_affected > 1) {
+ resultingMessage.append(
+ default_message + QStringLiteral(" ") +
+ tr("%n member(s) can now ban room members.", nullptr, true_affected_rest));
+ } else if (number_of_affected == 1) {
+ resultingMessage.append(
+ default_message + QStringLiteral(" ") +
+ tr("%1 can now ban room members.")
+ .arg(utils::replaceEmoji(displayName(affected.at(0)))));
+ }
+ } else {
+ resultingMessage.append(default_message);
+ }
+ } else {
+ resultingMessage.append(default_message);
+ }
+ }
+
+ if (event->content.state_default != prevEvent->content.state_default) {
+ auto default_message =
+ tr("%1 has changed the room's state_default powerlevel from %2 to %3.")
+ .arg(sender_name)
+ .arg(prevEvent->content.state_default)
+ .arg(event->content.state_default);
+
+ // We only calculate affected users if we change to a level above the default users PL
+ // to not accidentally have a DoS vector
+ if (event->content.state_default > default_powerlevel) {
+ auto [affected, number_of_affected] = calc_affected(event->content.kick);
+
+ if (number_of_affected != 0) {
+ auto true_affected_rest = number_of_affected - affected.size();
+ if (number_of_affected > 1) {
+ resultingMessage.append(
+ default_message + QStringLiteral(" ") +
+ tr("%n member(s) can now send state events.", nullptr, true_affected_rest));
+ } else if (number_of_affected == 1) {
+ resultingMessage.append(
+ default_message + QStringLiteral(" ") +
+ tr("%1 can now send state events.")
+ .arg(utils::replaceEmoji(displayName(affected.at(0)))));
+ }
+ } else {
+ resultingMessage.append(default_message);
+ }
+ } else {
+ resultingMessage.append(default_message);
+ }
+ }
+
+ // These affect potentially the whole room. We there for do not calculate who gets affected
+ // by this to prevent huge lists of people.
+ if (event->content.invite != prevEvent->content.invite) {
+ resultingMessage.append(tr("%1 has changed the room's invite powerlevel from %2 to %3.")
+ .arg(sender_name,
+ QString::number(prevEvent->content.invite),
+ QString::number(event->content.invite)));
+ }
+
+ if (event->content.events_default != prevEvent->content.events_default) {
+ if ((event->content.events_default > default_powerlevel) &&
+ prevEvent->content.events_default <= default_powerlevel) {
+ resultingMessage.append(
+ tr("%1 has changed the room's events_default powerlevel from %2 to %3. New "
+ "users can now not send any events.")
+ .arg(sender_name,
+ QString::number(prevEvent->content.events_default),
+ QString::number(event->content.events_default)));
+ } else if ((event->content.events_default < prevEvent->content.events_default) &&
+ (event->content.events_default < default_powerlevel) &&
+ (prevEvent->content.events_default > default_powerlevel)) {
+ resultingMessage.append(
+ tr("%1 has changed the room's events_default powerlevel from %2 to %3. New "
+ "users can now send events that are not otherwise restricted.")
+ .arg(sender_name,
+ QString::number(prevEvent->content.events_default),
+ QString::number(event->content.events_default)));
+ } else {
+ resultingMessage.append(
+ tr("%1 has changed the room's events_default powerlevel from %2 to %3.")
+ .arg(sender_name,
+ QString::number(prevEvent->content.events_default),
+ QString::number(event->content.events_default)));
+ }
+ }
+
+ // Compare if a Powerlevel of a user changed
+ for (auto const &[mxid, powerlevel] : event->content.users) {
+ auto nameOfChangedUser = utils::replaceEmoji(displayName(QString::fromStdString(mxid)));
+ if (prevEvent->content.user_level(mxid) != powerlevel) {
+ if (powerlevel >= administrator_power_level) {
+ resultingMessage.append(tr("%1 has made %2 an administrator of this room.")
+ .arg(sender_name, nameOfChangedUser));
+ } else if (powerlevel >= moderator_power_level &&
+ powerlevel > prevEvent->content.user_level(mxid)) {
+ resultingMessage.append(tr("%1 has made %2 a moderator of this room.")
+ .arg(sender_name, nameOfChangedUser));
+ } else if (powerlevel >= moderator_power_level &&
+ powerlevel < prevEvent->content.user_level(mxid)) {
+ resultingMessage.append(tr("%1 has downgraded %2 to moderator of this room.")
+ .arg(sender_name, nameOfChangedUser));
+ } else {
+ resultingMessage.append(tr("%1 has changed the powerlevel of %2 from %3 to %4.")
+ .arg(sender_name,
+ nameOfChangedUser,
+ QString::number(prevEvent->content.user_level(mxid)),
+ QString::number(powerlevel)));
+ }
+ }
+ }
+
+ // Handle added/removed/changed event type
+ for (auto const &[event_type, powerlevel] : event->content.events) {
+ auto prev_not_present =
+ prevEvent->content.events.find(event_type) == prevEvent->content.events.end();
+
+ if (prev_not_present || prevEvent->content.events.at(event_type) != powerlevel) {
+ if (powerlevel >= administrator_power_level) {
+ resultingMessage.append(tr("%1 allowed only administrators to send \"%2\".")
+ .arg(sender_name, QString::fromStdString(event_type)));
+ } else if (powerlevel >= moderator_power_level) {
+ resultingMessage.append(tr("%1 allowed only moderators to send \"%2\".")
+ .arg(sender_name, QString::fromStdString(event_type)));
+ } else if (powerlevel == default_powerlevel) {
+ resultingMessage.append(tr("%1 allowed everyone to send \"%2\".")
+ .arg(sender_name, QString::fromStdString(event_type)));
+ } else if (prev_not_present) {
+ resultingMessage.append(
+ tr("%1 has changed the powerlevel of event type \"%2\" from the default to %3.")
+ .arg(sender_name,
+ QString::fromStdString(event_type),
+ QString::number(powerlevel)));
+ } else {
+ resultingMessage.append(
+ tr("%1 has changed the powerlevel of event type \"%2\" from %3 to %4.")
+ .arg(sender_name,
+ QString::fromStdString(event_type),
+ QString::number(prevEvent->content.events.at(event_type)),
+ QString::number(powerlevel)));
+ }
+ }
+ }
+
+ if (!resultingMessage.isEmpty()) {
+ return resultingMessage.join("<br/>");
+ } else {
+ return tr("%1 has changed the room's permissions.").arg(sender_name);
+ }
}
QVariantMap
--
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