chore(eventsub): add operator== and indicator for shared chat (#5974)

lib/twitch-eventsub-ws/include/twitch-eventsub-ws/payloads/channel-moderate-v2.hpp

@@ -389,11 +389,11 @@ struct Event {
     String broadcasterUserName;
 
     /// For Shared Chat events, the user ID (e.g. 117166826) of the user who's channel the event took place in
-    std::optional<std::string> sourceBroadcasterUserID;
+    std::optional<String> sourceBroadcasterUserID;
     /// For Shared Chat events, the user Login (e.g. testaccount_420) of the user who's channel the event took place in
-    std::optional<std::string> sourceBroadcasterUserLogin;
+    std::optional<String> sourceBroadcasterUserLogin;
     /// For Shared Chat events, the user Name (e.g. 테스트계정420) of the user who's channel the event took place in
-    std::optional<std::string> sourceBroadcasterUserName;
+    std::optional<String> sourceBroadcasterUserName;
 
     /// User ID (e.g. 117166826) of the user who took the action
     String moderatorUserID;
@@ -439,6 +439,8 @@ struct Event {
                  SharedChatDelete,     //
                  std::string>
         action;
+
+    bool isFromSharedChat() const noexcept;
 };
 
 struct Payload {

lib/twitch-eventsub-ws/include/twitch-eventsub-ws/string.hpp

@@ -152,6 +152,24 @@ struct String {
         return (this->flags & (ALLOC_BIT | QT_BIT)) == 0;
     }
 
+    // note: because we're using C++ 20, the reversed operator
+    // (e.g. QAnyStringView == String) is automatically "synthesized".
+    bool operator==(const QAnyStringView &other) const noexcept
+    {
+        return this->view() == other;
+    }
+
+    bool operator==(const String &other) const noexcept
+    {
+        return this->view() == other.view();
+    }
+
+    template <typename = void>  // weak overload
+    bool operator==(const std::string_view &other) const noexcept
+    {
+        return this->view() == other;
+    }
+
 private:
     static constexpr size_t QT_BIT = 1ULL << (sizeof(size_t) * 8 - 1);
     static constexpr size_t ALLOC_BIT = 1ULL << (sizeof(size_t) * 8 - 2);