Make deletions show like timeouts/bans. (#2841)

Co-authored-by: pajlada <rasmus.karlsson@pajlada.com>

src/providers/twitch/IrcMessageHandler.cpp

@@ -479,7 +479,17 @@ void IrcMessageHandler::handleClearMessageMessage(Communi::IrcMessage *message)
 
     QString targetID = tags.value("target-msg-id").toString();
 
-    chan->deleteMessage(targetID);
+    auto msg = chan->findMessage(targetID);
+    if (msg != nullptr)
+    {
+        msg->flags.set(MessageFlag::Disabled);
+        if (!getSettings()->hideDeletionActions)
+        {
+            MessageBuilder builder;
+            TwitchMessageBuilder::deletionMessage(msg, &builder);
+            chan->addMessage(builder.release());
+        }
+    }
 }
 
 void IrcMessageHandler::handleUserStateMessage(Communi::IrcMessage *message)

src/providers/twitch/TwitchMessageBuilder.cpp

@@ -1356,5 +1356,36 @@ void TwitchMessageBuilder::hostingSystemMessage(const QString &channelName,
                                MessageColor::System, FontStyle::ChatMediumBold)
         ->setLink({Link::UserInfo, channelName});
 }
+void TwitchMessageBuilder::deletionMessage(const MessagePtr originalMessage,
+                                           MessageBuilder *builder)
+{
+    builder->emplace<TimestampElement>();
+    builder->message().flags.set(MessageFlag::System);
+    builder->message().flags.set(MessageFlag::DoNotTriggerNotification);
+    builder->message().flags.set(MessageFlag::Timeout);
+    // TODO(mm2pl): If or when jumping to a single message gets implemented a link,
+    // add a link to the originalMessage
+    builder->emplace<TextElement>("A message from", MessageElementFlag::Text,
+                                  MessageColor::System);
+    builder
+        ->emplace<TextElement>(originalMessage->displayName,
+                               MessageElementFlag::Username,
+                               MessageColor::System, FontStyle::ChatMediumBold)
+        ->setLink({Link::UserInfo, originalMessage->loginName});
+    builder->emplace<TextElement>("was deleted:", MessageElementFlag::Text,
+                                  MessageColor::System);
+    if (originalMessage->messageText.length() > 50)
+    {
+        builder->emplace<TextElement>(
+            originalMessage->messageText.left(50) + "...",
+            MessageElementFlag::Text, MessageColor::Text);
+    }
+    else
+    {
+        builder->emplace<TextElement>(originalMessage->messageText,
+                                      MessageElementFlag::Text,
+                                      MessageColor::Text);
+    }
+}
 
 }  // namespace chatterino

src/providers/twitch/TwitchMessageBuilder.hpp

@@ -64,6 +64,8 @@ public:
                                      MessageBuilder *builder);
     static void hostingSystemMessage(const QString &channelName,
                                      MessageBuilder *builder);
+    static void deletionMessage(const MessagePtr originalMessage,
+                                MessageBuilder *builder);
 
 private:
     void parseUsernameColor() override;