Add extra context to messages that are added to channels, allowing the logging controller to take more responsibility in what messages to log (#5499)

Co-auhtored-by: James Upjohn <jupjohn@jammeh.co.nz>

src/common/Channel.hpp

@@ -28,6 +28,14 @@ enum class TimeoutStackStyle : int {
     Default = DontStackBeyondUserMessage,
 };
 
+/// Context of the message being added to a channel
+enum class MessageContext {
+    /// This message is the original
+    Original,
+    /// This message is a repost of a message that has already been added in a channel
+    Repost,
+};
+
 class Channel : public std::enable_shared_from_this<Channel>
 {
 public:
@@ -79,7 +87,7 @@ public:
     // overridingFlags can be filled in with flags that should be used instead
     // of the message's flags. This is useful in case a flag is specific to a
     // type of split
-    void addMessage(MessagePtr message,
+    void addMessage(MessagePtr message, MessageContext context,
                     std::optional<MessageFlags> overridingFlags = std::nullopt);
     void addMessagesAtStart(const std::vector<MessagePtr> &messages_);
 
@@ -120,6 +128,7 @@ public:
 protected:
     virtual void onConnected();
     virtual void messageRemovedFromStart(const MessagePtr &msg);
+    QString platform_{"other"};
 
 private:
     const QString name_;