Added an Event Hook System (#1578)

* added an eventHookSystem

* Add all socket2 events to hooks

1 files changed, 36 insertions, 0 deletions

diff --git a/src/managers/HookSystemManager.hpp b/src/managers/HookSystemManager.hpp
new file mode 100644
index 00000000..57f1e58b
--- /dev/null
+++ b/src/managers/HookSystemManager.hpp
@@ -0,0 +1,36 @@
+#pragma once
+
+#include "../defines.hpp"
+
+#include <unordered_map>
+#include <any>
+#include <list>
+
+// global typedef for hooked functions. Passes itself as a ptr when called, and `data` additionally.
+typedef std::function<void(void*, std::any)> HOOK_CALLBACK_FN;
+
+#define EMIT_HOOK_EVENT(name, param)                                                                                                                                               \
+    {                                                                                                                                                                              \
+        static auto* const PEVENTVEC = g_pHookSystem->getVecForEvent(name);                                                                                                        \
+        g_pHookSystem->emit(PEVENTVEC, param);                                                                                                                                     \
+    }
+
+class CHookSystemManager {
+  public:
+    CHookSystemManager();
+
+    // returns the pointer to the function
+    HOOK_CALLBACK_FN*               hookDynamic(const std::string& event, HOOK_CALLBACK_FN fn);
+    void                            hookStatic(const std::string& event, HOOK_CALLBACK_FN* fn);
+    void                            unhook(HOOK_CALLBACK_FN* fn);
+
+    void                            emit(const std::vector<HOOK_CALLBACK_FN*>* callbacks, std::any data = 0);
+    std::vector<HOOK_CALLBACK_FN*>* getVecForEvent(const std::string& event);
+
+  private:
+    // todo: this is slow. Maybe static ptrs should be somehow allowed. unique ptr for vec?
+    std::list<std::pair<std::string, std::vector<HOOK_CALLBACK_FN*>>> m_lpRegisteredHooks;
+    std::list<HOOK_CALLBACK_FN>                                       m_lCallbackFunctions;
+};
+
+inline std::unique_ptr<CHookSystemManager> g_pHookSystem;
\ No newline at end of file