fix(plugins): Implement __eq for Channel (#6456)

src/controllers/plugins/api/ChannelRef.cpp

@@ -7,6 +7,7 @@
 #    include "controllers/plugins/SolTypes.hpp"
 #    include "providers/twitch/TwitchChannel.hpp"
 #    include "providers/twitch/TwitchIrcServer.hpp"
+#    include "util/WeakPtrHelpers.hpp"
 
 #    include <sol/sol.hpp>
 
@@ -159,6 +160,11 @@ QString ChannelRef::to_string()
     return QStringView(u"<c2.Channel %1>").arg(chan->getName());
 }
 
+bool ChannelRef::operator==(const ChannelRef &other) const noexcept
+{
+    return weakOwnerEquals(this->weak, other.weak);
+}
+
 std::optional<ChannelRef> ChannelRef::get_by_name(const QString &name)
 {
     auto chan = getApp()->getTwitch()->getChannelOrEmpty(name);

src/controllers/plugins/api/ChannelRef.hpp

@@ -155,6 +155,8 @@ public:
      */
     QString to_string();
 
+    bool operator==(const ChannelRef &other) const noexcept;
+
     /**
      * Static functions
      */

src/util/WeakPtrHelpers.hpp

@@ -0,0 +1,19 @@
+#pragma once
+
+#include <memory>
+
+namespace chatterino {
+
+/// Check if the owner of two weak pointers is equal.
+///
+/// Like `std::weak_ptr::owner_before`, this compares the control blocks,
+/// not the objects themselves.
+/// Equivalent to the C++ 26 `std::weak_ptr::owner_equal`.
+template <typename T>
+bool weakOwnerEquals(const std::weak_ptr<T> &a,
+                     const std::weak_ptr<T> &b) noexcept
+{
+    return !a.owner_before(b) && !b.owner_before(a);
+}
+
+}  // namespace chatterino