Add ban user by id command /banid (#4411)

Co-authored-by: Felanbird <41973452+Felanbird@users.noreply.github.com>
Co-authored-by: pajlada <rasmus.karlsson@pajlada.com>

CHANGELOG.md

@@ -3,6 +3,7 @@
 ## Unversioned
 
 - Minor: Delete all but the last 5 crashdumps on application start. (#4392)
+- Minor: Added `/banid` command that allows banning by user ID. (#4411)
 - Bugfix: Fixed uploaded AppImage not being able most web requests. (#4400)
 - Bugfix: Fixed a potential race condition due to using the wrong lock when loading 7TV badges. (#4402)
 - Dev: Add capability to build Chatterino with Qt6. (#4393)

src/controllers/commands/CommandController.cpp

@@ -2632,7 +2632,7 @@ void CommandController::initialize(Settings &, Paths &paths)
 
     auto formatBanTimeoutError =
         [](const char *operation, HelixBanUserError error,
-           const QString &message, const QString &userDisplayName) -> QString {
+           const QString &message, const QString &userTarget) -> QString {
         using Error = HelixBanUserError;
 
         QString errorMessage = QString("Failed to %1 user - ").arg(operation);
@@ -2659,7 +2659,7 @@ void CommandController::initialize(Settings &, Paths &paths)
             case Error::TargetBanned: {
                 // Equivalent IRC error
                 errorMessage += QString("%1 is already banned in this channel.")
-                                    .arg(userDisplayName);
+                                    .arg(userTarget);
             }
             break;
 
@@ -2669,8 +2669,8 @@ void CommandController::initialize(Settings &, Paths &paths)
                 // The messages from IRC are formatted like this:
                 // "You cannot {op} moderator {mod} unless you are the owner of this channel."
                 // "You cannot {op} the broadcaster."
-                errorMessage += QString("You cannot %1 %2.")
+                errorMessage +=
-                                    .arg(operation, userDisplayName);
+                    QString("You cannot %1 %2.").arg(operation, userTarget);
             }
             break;
 
@@ -2829,6 +2829,53 @@ void CommandController::initialize(Settings &, Paths &paths)
         return "";
     });
 
+    this->registerCommand("/banid", [formatBanTimeoutError](
+                                        const QStringList &words,
+                                        auto channel) {
+        auto *twitchChannel = dynamic_cast<TwitchChannel *>(channel.get());
+        if (twitchChannel == nullptr)
+        {
+            channel->addMessage(makeSystemMessage(
+                QString("The /banid command only works in Twitch channels")));
+            return "";
+        }
+
+        const auto *usageStr =
+            "Usage: \"/banid <userID> [reason]\" - Permanently prevent a user "
+            "from chatting via their user ID. Reason is optional and will be "
+            "shown to the target user and other moderators.";
+        if (words.size() < 2)
+        {
+            channel->addMessage(makeSystemMessage(usageStr));
+            return "";
+        }
+
+        auto currentUser = getApp()->accounts->twitch.getCurrent();
+        if (currentUser->isAnon())
+        {
+            channel->addMessage(
+                makeSystemMessage("You must be logged in to ban someone!"));
+            return "";
+        }
+
+        auto target = words.at(1);
+        auto reason = words.mid(2).join(' ');
+
+        getHelix()->banUser(
+            twitchChannel->roomId(), currentUser->getUserId(), target,
+            boost::none, reason,
+            [] {
+                // No response for bans, they're emitted over pubsub/IRC instead
+            },
+            [channel, target, formatBanTimeoutError](auto error, auto message) {
+                auto errorMessage =
+                    formatBanTimeoutError("ban", error, message, "#" + target);
+                channel->addMessage(makeSystemMessage(errorMessage));
+            });
+
+        return "";
+    });
+
     for (const auto &cmd : TWITCH_WHISPER_COMMANDS)
     {
         this->registerCommand(cmd, [](const QStringList &words, auto channel) {