13 files changed, 637 insertions, 548 deletions

diff --git a/primedev/plugins/interfaces/IPluginCallbacks.h b/primedev/plugins/interfaces/IPluginCallbacks.h
new file mode 100644
index 00000000..c02ce8a6
--- /dev/null
+++ b/primedev/plugins/interfaces/IPluginCallbacks.h
@@ -0,0 +1,36 @@
+#ifndef IPLUGIN_CALLBACKS_H
+#define IPLUGIN_CALLBACKS_H
+
+#include <windows.h>
+#include <stdint.h>
+#include "squirrel/squirrel.h"
+
+// can't use bitwise ops on enum classes but I don't want these in the global namespace (user defined operators suck)
+namespace PluginContext
+{
+	enum : uint64_t
+	{
+		DEDICATED = 0x1,
+		CLIENT = 0x2,
+	};
+}
+
+struct PluginNorthstarData
+{
+	HMODULE pluginHandle;
+};
+
+class IPluginCallbacks
+{
+public:
+	virtual void
+	Init(HMODULE northstarModule, const PluginNorthstarData* initData, bool reloaded) = 0; // runs after the plugin is loaded and validated
+	virtual void Finalize() = 0; // runs after all plugins have been loaded
+	virtual bool Unload() = 0; // runs just before the library is freed
+	virtual void OnSqvmCreated(CSquirrelVM* sqvm) = 0;
+	virtual void OnSqvmDestroying(CSquirrelVM* sqvm) = 0;
+	virtual void OnLibraryLoaded(HMODULE module, const char* name) = 0;
+	virtual void RunFrame() = 0;
+};
+
+#endif
diff --git a/primedev/plugins/interfaces/IPluginId.h b/primedev/plugins/interfaces/IPluginId.h
new file mode 100644
index 00000000..dc4c548b
--- /dev/null
+++ b/primedev/plugins/interfaces/IPluginId.h
@@ -0,0 +1,31 @@
+#ifndef IPLUGIN_ID_H
+#define IPLUGIN_ID_H
+
+#include <stdint.h>
+#include "squirrel/squirrelclasstypes.h"
+
+#define PLUGIN_ID_VERSION "PluginId001"
+
+// an identifier for the type of string data requested from the plugin
+enum class PluginString : int
+{
+	NAME = 0,
+	LOG_NAME = 1,
+	DEPENDENCY_NAME = 2,
+};
+
+// an identifier for the type of bitflag requested from the plugin
+enum class PluginField : int
+{
+	CONTEXT = 0,
+};
+
+// an interface that is required from every plugin to query data about it
+class IPluginId
+{
+public:
+	virtual const char* GetString(PluginString prop) = 0;
+	virtual int64_t GetField(PluginField prop) = 0;
+};
+
+#endif
diff --git a/primedev/plugins/interfaces/interface.cpp b/primedev/plugins/interfaces/interface.cpp
new file mode 100644
index 00000000..4c006f2c
--- /dev/null
+++ b/primedev/plugins/interfaces/interface.cpp
@@ -0,0 +1,36 @@
+#include <string.h>
+#include "interface.h"
+
+InterfaceReg* s_pInterfaceRegs;
+
+InterfaceReg::InterfaceReg(InstantiateInterfaceFn fn, const char* pName) : m_pName(pName)
+{
+	m_CreateFn = fn;
+	m_pNext = s_pInterfaceRegs;
+	s_pInterfaceRegs = this;
+}
+
+void* CreateInterface(const char* pName, InterfaceStatus* pReturnCode)
+{
+	for (InterfaceReg* pCur = s_pInterfaceRegs; pCur; pCur = pCur->m_pNext)
+	{
+		if (strcmp(pCur->m_pName, pName) == 0)
+		{
+			if (pReturnCode)
+			{
+				*pReturnCode = InterfaceStatus::IFACE_OK;
+			}
+
+			NS::log::PLUGINSYS->info("creating interface {}", pName);
+			return pCur->m_CreateFn();
+		}
+	}
+
+	if (pReturnCode)
+	{
+		*pReturnCode = InterfaceStatus::IFACE_FAILED;
+	}
+
+	NS::log::PLUGINSYS->error("could not find interface {}", pName);
+	return NULL;
+}
diff --git a/primedev/plugins/interfaces/interface.h b/primedev/plugins/interfaces/interface.h
new file mode 100644
index 00000000..440db5b2
--- /dev/null
+++ b/primedev/plugins/interfaces/interface.h
@@ -0,0 +1,39 @@
+#ifndef INTERFACE_H
+#define INTERFACE_H
+
+typedef void* (*InstantiateInterfaceFn)();
+
+// Used internally to register classes.
+class InterfaceReg
+{
+public:
+	InterfaceReg(InstantiateInterfaceFn fn, const char* pName);
+
+	InstantiateInterfaceFn m_CreateFn;
+	const char* m_pName;
+	InterfaceReg* m_pNext;
+};
+
+// Use this to expose an interface that can have multiple instances.
+#define EXPOSE_INTERFACE(className, interfaceName, versionName)                                                                            \
+	static void* __Create##className##_interface()                                                                                         \
+	{                                                                                                                                      \
+		return static_cast<interfaceName*>(new className);                                                                                 \
+	}                                                                                                                                      \
+	static InterfaceReg __g_Create##className##_reg(__Create##className##_interface, versionName);
+
+#define EXPOSE_SINGLE_INTERFACE_GLOBALVAR(className, interfaceName, versionName, globalVarName)                                            \
+	static void* __Create##className##interfaceName##_interface()                                                                          \
+	{                                                                                                                                      \
+		return static_cast<interfaceName*>(&globalVarName);                                                                                \
+	}                                                                                                                                      \
+	static InterfaceReg __g_Create##className##interfaceName##_reg(__Create##className##interfaceName##_interface, versionName);
+
+// Use this to expose a singleton interface. This creates the global variable for you automatically.
+#define EXPOSE_SINGLE_INTERFACE(className, interfaceName, versionName)                                                                     \
+	static className __g_##className##_singleton;                                                                                          \
+	EXPOSE_SINGLE_INTERFACE_GLOBALVAR(className, interfaceName, versionName, __g_##className##_singleton)
+
+EXPORT void* CreateInterface(const char* pName, InterfaceStatus* pReturnCode);
+
+#endif
diff --git a/primedev/plugins/interfaces/sys/ISys.cpp b/primedev/plugins/interfaces/sys/ISys.cpp
new file mode 100644
index 00000000..6b0b41dd
--- /dev/null
+++ b/primedev/plugins/interfaces/sys/ISys.cpp
@@ -0,0 +1,66 @@
+#include "plugins/interfaces/interface.h"
+#include "ISys.h"
+#include "plugins/plugins.h"
+#include "plugins/pluginmanager.h"
+
+class CSys : public ISys
+{
+public:
+	void Log(HMODULE handle, LogLevel level, char* msg)
+	{
+		spdlog::level::level_enum spdLevel;
+
+		switch (level)
+		{
+		case LogLevel::WARN:
+			spdLevel = spdlog::level::level_enum::warn;
+			break;
+		case LogLevel::ERR:
+			spdLevel = spdlog::level::level_enum::err;
+			break;
+		default:
+			NS::log::PLUGINSYS->warn("Attempted to log with invalid level {}. Defaulting to info", (int)level);
+		case LogLevel::INFO:
+			spdLevel = spdlog::level::level_enum::info;
+			break;
+		}
+
+		std::optional<Plugin> plugin = g_pPluginManager->GetPlugin(handle);
+		if (plugin)
+		{
+			plugin->Log(spdLevel, msg);
+		}
+		else
+		{
+			NS::log::PLUGINSYS->warn("Attempted to log message '{}' with invalid plugin handle {}", msg, static_cast<void*>(handle));
+		}
+	}
+
+	void Unload(HMODULE handle)
+	{
+		std::optional<Plugin> plugin = g_pPluginManager->GetPlugin(handle);
+		if (plugin)
+		{
+			plugin->Unload();
+		}
+		else
+		{
+			NS::log::PLUGINSYS->warn("Attempted to unload plugin with invalid handle {}", static_cast<void*>(handle));
+		}
+	}
+
+	void Reload(HMODULE handle)
+	{
+		std::optional<Plugin> plugin = g_pPluginManager->GetPlugin(handle);
+		if (plugin)
+		{
+			plugin->Reload();
+		}
+		else
+		{
+			NS::log::PLUGINSYS->warn("Attempted to reload plugin with invalid handle {}", static_cast<void*>(handle));
+		}
+	}
+};
+
+EXPOSE_SINGLE_INTERFACE(CSys, ISys, SYS_VERSION);
diff --git a/primedev/plugins/interfaces/sys/ISys.h b/primedev/plugins/interfaces/sys/ISys.h
new file mode 100644
index 00000000..3e55a6d9
--- /dev/null
+++ b/primedev/plugins/interfaces/sys/ISys.h
@@ -0,0 +1,21 @@
+#ifndef ILOGGING_H
+#define ILOGGING_H
+
+#define SYS_VERSION "NSSys001"
+
+enum class LogLevel : int
+{
+	INFO = 0,
+	WARN,
+	ERR,
+};
+
+class ISys
+{
+public:
+	virtual void Log(HMODULE handle, LogLevel level, char* msg) = 0;
+	virtual void Unload(HMODULE handle) = 0;
+	virtual void Reload(HMODULE handle) = 0;
+};
+
+#endif
diff --git a/primedev/plugins/plugin_abi.h b/primedev/plugins/plugin_abi.h
deleted file mode 100644
index 16b26a1c..00000000
--- a/primedev/plugins/plugin_abi.h
+++ /dev/null
@@ -1,151 +0,0 @@
-#pragma once
-#include "squirrel/squirrelclasstypes.h"
-
-#define ABI_VERSION 3
-
-enum PluginLoadDLL
-{
-	ENGINE = 0,
-	CLIENT,
-	SERVER
-};
-
-enum ObjectType
-{
-	CONCOMMANDS = 0,
-	CONVAR = 1,
-};
-
-struct SquirrelFunctions
-{
-	RegisterSquirrelFuncType RegisterSquirrelFunc;
-	sq_defconstType __sq_defconst;
-
-	sq_compilebufferType __sq_compilebuffer;
-	sq_callType __sq_call;
-	sq_raiseerrorType __sq_raiseerror;
-	sq_compilefileType __sq_compilefile;
-
-	sq_newarrayType __sq_newarray;
-	sq_arrayappendType __sq_arrayappend;
-
-	sq_newtableType __sq_newtable;
-	sq_newslotType __sq_newslot;
-
-	sq_pushroottableType __sq_pushroottable;
-	sq_pushstringType __sq_pushstring;
-	sq_pushintegerType __sq_pushinteger;
-	sq_pushfloatType __sq_pushfloat;
-	sq_pushboolType __sq_pushbool;
-	sq_pushassetType __sq_pushasset;
-	sq_pushvectorType __sq_pushvector;
-	sq_pushobjectType __sq_pushobject;
-
-	sq_getstringType __sq_getstring;
-	sq_getintegerType __sq_getinteger;
-	sq_getfloatType __sq_getfloat;
-	sq_getboolType __sq_getbool;
-	sq_getType __sq_get;
-	sq_getassetType __sq_getasset;
-	sq_getuserdataType __sq_getuserdata;
-	sq_getvectorType __sq_getvector;
-	sq_getthisentityType __sq_getthisentity;
-	sq_getobjectType __sq_getobject;
-
-	sq_stackinfosType __sq_stackinfos;
-
-	sq_createuserdataType __sq_createuserdata;
-	sq_setuserdatatypeidType __sq_setuserdatatypeid;
-	sq_getfunctionType __sq_getfunction;
-
-	sq_schedule_call_externalType __sq_schedule_call_external;
-
-	sq_getentityfrominstanceType __sq_getentityfrominstance;
-	sq_GetEntityConstantType __sq_GetEntityConstant_CBaseEntity;
-
-	sq_pushnewstructinstanceType __sq_pushnewstructinstance;
-	sq_sealstructslotType __sq_sealstructslot;
-};
-
-struct MessageSource
-{
-	const char* file;
-	const char* func;
-	int line;
-};
-
-// This is a modified version of spdlog::details::log_msg
-// This is so that we can make it cross DLL boundaries
-struct LogMsg
-{
-	int level;
-	uint64_t timestamp;
-	const char* msg;
-	MessageSource source;
-	int pluginHandle;
-};
-
-extern "C"
-{
-	typedef void (*loggerfunc_t)(LogMsg* msg);
-	typedef void (*PLUGIN_RELAY_INVITE_TYPE)(const char* invite);
-	typedef void* (*CreateObjectFunc)(ObjectType type);
-
-	typedef void (*PluginFnCommandCallback_t)(void* command);
-	typedef void (*PluginConCommandConstructorType)(
-		void* newCommand, const char* name, PluginFnCommandCallback_t callback, const char* helpString, int flags, void* parent);
-	typedef void (*PluginConVarRegisterType)(
-		void* pConVar,
-		const char* pszName,
-		const char* pszDefaultValue,
-		int nFlags,
-		const char* pszHelpString,
-		bool bMin,
-		float fMin,
-		bool bMax,
-		float fMax,
-		void* pCallback);
-	typedef void (*PluginConVarMallocType)(void* pConVarMaloc, int a2, int a3);
-}
-
-struct PluginNorthstarData
-{
-	const char* version;
-	HMODULE northstarModule;
-	int pluginHandle;
-};
-
-struct PluginInitFuncs
-{
-	loggerfunc_t logger;
-	PLUGIN_RELAY_INVITE_TYPE relayInviteFunc;
-	CreateObjectFunc createObject;
-};
-
-struct PluginEngineData
-{
-	PluginConCommandConstructorType ConCommandConstructor;
-	PluginConVarMallocType conVarMalloc;
-	PluginConVarRegisterType conVarRegister;
-	void* ConVar_Vtable;
-	void* IConVar_Vtable;
-	void* g_pCVar;
-};
-
-/// <summary> Async communication within the plugin system
-/// Due to the asynchronous nature of plugins, combined with the limitations of multi-compiler support
-/// and the custom memory allocator used by r2, is it difficult to safely get data across DLL boundaries
-/// from Northstar to plugin unless Northstar can own that memory.
-/// This means that plugins should manage their own memory and can only receive data from northstar using one of the functions below.
-/// These should be exports of the plugin DLL. If they are not exported, they will not be called.
-/// Note that it is not required to have these exports if you do not use them.
-/// </summary>
-
-// Northstar -> Plugin
-typedef void (*PLUGIN_INIT_TYPE)(PluginInitFuncs* funcs, PluginNorthstarData* data);
-typedef void (*PLUGIN_INIT_SQVM_TYPE)(SquirrelFunctions* funcs);
-typedef void (*PLUGIN_INFORM_SQVM_CREATED_TYPE)(ScriptContext context, CSquirrelVM* sqvm);
-typedef void (*PLUGIN_INFORM_SQVM_DESTROYED_TYPE)(ScriptContext context);
-
-typedef void (*PLUGIN_INFORM_DLL_LOAD_TYPE)(const char* dll, PluginEngineData* data, void* dllPtr);
-typedef void (*PLUGIN_RUNFRAME)();
diff --git a/primedev/plugins/pluginbackend.cpp b/primedev/plugins/pluginbackend.cpp
deleted file mode 100644
index 850394ac..00000000
--- a/primedev/plugins/pluginbackend.cpp
+++ /dev/null
@@ -1,50 +0,0 @@
-#include "pluginbackend.h"
-#include "plugin_abi.h"
-#include "server/serverpresence.h"
-#include "masterserver/masterserver.h"
-#include "squirrel/squirrel.h"
-#include "plugins.h"
-
-#include "core/convar/concommand.h"
-
-#include <filesystem>
-
-#define EXPORT extern "C" __declspec(dllexport)
-
-AUTOHOOK_INIT()
-
-PluginCommunicationHandler* g_pPluginCommunicationhandler;
-
-static PluginDataRequest storedRequest {PluginDataRequestType::END, (PluginRespondDataCallable) nullptr};
-
-void PluginCommunicationHandler::RunFrame()
-{
-	std::lock_guard<std::mutex> lock(requestMutex);
-	if (!requestQueue.empty())
-	{
-		storedRequest = requestQueue.front();
-		switch (storedRequest.type)
-		{
-		default:
-			spdlog::error("{} was called with invalid request type '{}'", __FUNCTION__, static_cast<int>(storedRequest.type));
-		}
-		requestQueue.pop();
-	}
-}
-
-void PluginCommunicationHandler::PushRequest(PluginDataRequestType type, PluginRespondDataCallable func)
-{
-	std::lock_guard<std::mutex> lock(requestMutex);
-	requestQueue.push(PluginDataRequest {type, func});
-}
-
-void InformPluginsDLLLoad(fs::path dllPath, void* address)
-{
-	std::string dllName = dllPath.filename().string();
-
-	void* data = NULL;
-	if (strncmp(dllName.c_str(), "engine.dll", 10) == 0)
-		data = &g_pPluginCommunicationhandler->m_sEngineData;
-
-	g_pPluginManager->InformDLLLoad(dllName.c_str(), data, address);
-}
diff --git a/primedev/plugins/pluginbackend.h b/primedev/plugins/pluginbackend.h
deleted file mode 100644
index 45cd42f3..00000000
--- a/primedev/plugins/pluginbackend.h
+++ /dev/null
@@ -1,40 +0,0 @@
-#pragma once
-#include "plugin_abi.h"
-
-#include <queue>
-#include <mutex>
-
-enum PluginDataRequestType
-{
-	END = 0,
-};
-
-union PluginRespondDataCallable
-{
-	// Empty for now
-	void* UNUSED;
-};
-
-class PluginDataRequest
-{
-public:
-	PluginDataRequestType type;
-	PluginRespondDataCallable func;
-	PluginDataRequest(PluginDataRequestType type, PluginRespondDataCallable func) : type(type), func(func) {}
-};
-
-class PluginCommunicationHandler
-{
-public:
-	void RunFrame();
-	void PushRequest(PluginDataRequestType type, PluginRespondDataCallable func);
-
-public:
-	std::queue<PluginDataRequest> requestQueue = {};
-	std::mutex requestMutex;
-
-	PluginEngineData m_sEngineData {};
-};
-
-void InformPluginsDLLLoad(fs::path dllPath, void* address);
-extern PluginCommunicationHandler* g_pPluginCommunicationhandler;
diff --git a/primedev/plugins/pluginmanager.cpp b/primedev/plugins/pluginmanager.cpp
new file mode 100644
index 00000000..718e6956
--- /dev/null
+++ b/primedev/plugins/pluginmanager.cpp
@@ -0,0 +1,184 @@
+#include "pluginmanager.h"
+
+#include <regex>
+#include "plugins.h"
+#include "config/profile.h"
+#include "core/convar/concommand.h"
+
+PluginManager* g_pPluginManager;
+
+const std::vector<Plugin>& PluginManager::GetLoadedPlugins() const
+{
+	return this->plugins;
+}
+
+const std::optional<Plugin> PluginManager::GetPlugin(HMODULE handle) const
+{
+	for (const Plugin& plugin : GetLoadedPlugins())
+		if (plugin.m_handle == handle)
+			return plugin;
+	return std::nullopt;
+}
+
+void PluginManager::LoadPlugin(fs::path path, bool reloaded)
+{
+	Plugin plugin = Plugin(path.string());
+
+	if (!plugin.IsValid())
+	{
+		NS::log::PLUGINSYS->warn("Unloading invalid plugin '{}'", path.string());
+		plugin.Unload();
+		return;
+	}
+
+	plugins.push_back(plugin);
+	plugin.Init(reloaded);
+}
+
+inline void FindPlugins(fs::path pluginPath, std::vector<fs::path>& paths)
+{
+	// ensure dirs exist
+	if (!fs::exists(pluginPath) || !fs::is_directory(pluginPath))
+	{
+		return;
+	}
+
+	for (const fs::directory_entry& entry : fs::directory_iterator(pluginPath))
+	{
+		if (fs::is_regular_file(entry) && entry.path().extension() == ".dll")
+			paths.emplace_back(entry.path());
+	}
+}
+
+bool PluginManager::LoadPlugins(bool reloaded)
+{
+	if (strstr(GetCommandLineA(), "-noplugins") != NULL)
+	{
+		NS::log::PLUGINSYS->warn("-noplugins detected; skipping loading plugins");
+		return false;
+	}
+
+	fs::create_directories(GetThunderstoreModFolderPath());
+
+	std::vector<fs::path> paths;
+
+	pluginPath = GetNorthstarPrefix() + "\\plugins";
+
+	fs::path libPath = fs::absolute(pluginPath + "\\lib");
+	if (fs::exists(libPath) && fs::is_directory(libPath))
+		AddDllDirectory(libPath.wstring().c_str());
+
+	FindPlugins(pluginPath, paths);
+
+	// Special case for Thunderstore mods dir
+	std::filesystem::directory_iterator thunderstoreModsDir = fs::directory_iterator(GetThunderstoreModFolderPath());
+	// Set up regex for `AUTHOR-MOD-VERSION` pattern
+	std::regex pattern(R"(.*\\([a-zA-Z0-9_]+)-([a-zA-Z0-9_]+)-(\d+\.\d+\.\d+))");
+	for (fs::directory_entry dir : thunderstoreModsDir)
+	{
+		fs::path pluginsDir = dir.path() / "plugins";
+		// Use regex to match `AUTHOR-MOD-VERSION` pattern
+		if (!std::regex_match(dir.path().string(), pattern))
+		{
+			spdlog::warn("The following directory did not match 'AUTHOR-MOD-VERSION': {}", dir.path().string());
+			continue; // skip loading package that doesn't match
+		}
+
+		fs::path libDir = fs::absolute(pluginsDir / "lib");
+		if (fs::exists(libDir) && fs::is_directory(libDir))
+			AddDllDirectory(libDir.wstring().c_str());
+
+		FindPlugins(pluginsDir, paths);
+	}
+
+	if (paths.empty())
+	{
+		NS::log::PLUGINSYS->warn("Could not find any plugins. Skipped loading plugins");
+		return false;
+	}
+
+	for (fs::path path : paths)
+	{
+		LoadPlugin(path, reloaded);
+	}
+
+	InformAllPluginsInitialized();
+
+	return true;
+}
+
+void PluginManager::ReloadPlugins()
+{
+	for (const Plugin& plugin : this->GetLoadedPlugins())
+	{
+		plugin.Unload();
+	}
+
+	this->plugins.clear();
+	this->LoadPlugins(true);
+}
+
+void PluginManager::RemovePlugin(HMODULE handle)
+{
+	for (size_t i = 0; i < plugins.size(); i++)
+	{
+		Plugin* plugin = &plugins[i];
+		if (plugin->m_handle == handle)
+		{
+			plugins.erase(plugins.begin() + i);
+			return;
+		}
+	}
+}
+
+void PluginManager::InformAllPluginsInitialized() const
+{
+	for (const Plugin& plugin : GetLoadedPlugins())
+	{
+		plugin.Finalize();
+	}
+}
+
+void PluginManager::InformSqvmCreated(CSquirrelVM* sqvm) const
+{
+	for (const Plugin& plugin : GetLoadedPlugins())
+	{
+		plugin.OnSqvmCreated(sqvm);
+	}
+}
+
+void PluginManager::InformSqvmDestroying(CSquirrelVM* sqvm) const
+{
+	for (const Plugin& plugin : GetLoadedPlugins())
+	{
+		plugin.OnSqvmDestroying(sqvm);
+	}
+}
+
+void PluginManager::InformDllLoad(HMODULE module, fs::path path) const
+{
+	std::string fn = path.filename().string(); // without this the string gets freed immediately lmao
+	const char* filename = fn.c_str();
+	for (const Plugin& plugin : GetLoadedPlugins())
+	{
+		plugin.OnLibraryLoaded(module, filename);
+	}
+}
+
+void PluginManager::RunFrame() const
+{
+	for (const Plugin& plugin : GetLoadedPlugins())
+	{
+		plugin.RunFrame();
+	}
+}
+
+void ConCommand_reload_plugins(const CCommand& args)
+{
+	g_pPluginManager->ReloadPlugins();
+}
+
+ON_DLL_LOAD_RELIESON("engine.dll", PluginManager, ConCommand, (CModule module))
+{
+	RegisterConCommand("reload_plugins", ConCommand_reload_plugins, "reloads plugins", FCVAR_NONE);
+}
diff --git a/primedev/plugins/pluginmanager.h b/primedev/plugins/pluginmanager.h
new file mode 100644
index 00000000..8c021851
--- /dev/null
+++ b/primedev/plugins/pluginmanager.h
@@ -0,0 +1,33 @@
+#ifndef PLUGIN_MANAGER_H
+#define PLUGIN_MANAGER_H
+
+#include <windows.h>
+
+class Plugin;
+
+class PluginManager
+{
+public:
+	const std::vector<Plugin>& GetLoadedPlugins() const;
+	const std::optional<Plugin> GetPlugin(HMODULE handle) const;
+	bool LoadPlugins(bool reloaded = false);
+	void LoadPlugin(fs::path path, bool reloaded = false);
+	void ReloadPlugins();
+	void RemovePlugin(HMODULE handle);
+
+	// callback triggers
+	void InformSqvmCreated(CSquirrelVM* sqvm) const;
+	void InformSqvmDestroying(CSquirrelVM* sqvm) const;
+	void InformDllLoad(HMODULE module, fs::path path) const;
+	void RunFrame() const;
+
+private:
+	void InformAllPluginsInitialized() const;
+
+	std::vector<Plugin> plugins;
+	std::string pluginPath;
+};
+
+extern PluginManager* g_pPluginManager;
+
+#endif
diff --git a/primedev/plugins/plugins.cpp b/primedev/plugins/plugins.cpp
index 311285e1..eddaa8ac 100644
--- a/primedev/plugins/plugins.cpp
+++ b/primedev/plugins/plugins.cpp
@@ -1,340 +1,233 @@
 #include "plugins.h"
-#include "config/profile.h"
-
+#include "pluginmanager.h"
 #include "squirrel/squirrel.h"
-#include "plugins.h"
-#include "masterserver/masterserver.h"
-#include "core/convar/convar.h"
-#include "server/serverpresence.h"
-#include <optional>
-#include <regex>
-
-#include "util/version.h"
-#include "pluginbackend.h"
 #include "util/wininfo.h"
+#include "core/sourceinterface.h"
 #include "logging/logging.h"
 #include "dedicated/dedicated.h"
 
-PluginManager* g_pPluginManager;
-
-void freeLibrary(HMODULE hLib)
+bool isValidSquirrelIdentifier(std::string s)
 {
-	if (!FreeLibrary(hLib))
-	{
-		spdlog::error("There was an error while trying to free library");
+	if (!s.size())
+		return false; // identifiers can't be empty
+	if (s[0] <= 57)
+		return false; // identifier can't start with a number
+	for (char& c : s)
+	{
+		// only allow underscores, 0-9, A-Z and a-z
+		if ((c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z') || c == '_')
+			continue;
+		return false;
 	}
+	return true;
 }
 
-EXPORT void PLUGIN_LOG(LogMsg* msg)
+Plugin::Plugin(std::string path) : m_location(path)
 {
-	spdlog::source_loc src {};
-	src.filename = msg->source.file;
-	src.funcname = msg->source.func;
-	src.line = msg->source.line;
-	auto&& logger = g_pPluginManager->m_vLoadedPlugins[msg->pluginHandle].logger;
-	logger->log(src, (spdlog::level::level_enum)msg->level, msg->msg);
-}
+	HMODULE pluginModule = GetModuleHandleA(path.c_str());
 
-EXPORT void* CreateObject(ObjectType type)
-{
-	switch (type)
+	if (pluginModule)
 	{
-	case ObjectType::CONVAR:
-		return (void*)new ConVar;
-	case ObjectType::CONCOMMANDS:
-		return (void*)new ConCommand;
-	default:
-		return NULL;
+		// plugins may refuse to get unloaded for any reason so we need to prevent them getting loaded twice when reloading plugins
+		NS::log::PLUGINSYS->warn("Plugin has already been loaded");
+		return;
 	}
-}
 
-std::optional<Plugin> PluginManager::LoadPlugin(fs::path path, PluginInitFuncs* funcs, PluginNorthstarData* data)
-{
-
-	Plugin plugin {};
+	m_handle = LoadLibraryExA(path.c_str(), 0, LOAD_LIBRARY_SEARCH_USER_DIRS | LOAD_LIBRARY_SEARCH_DEFAULT_DIRS);
 
-	std::string pathstring = path.string();
-	std::wstring wpath = path.wstring();
+	NS::log::PLUGINSYS->info("loaded plugin handle {}", static_cast<void*>(m_handle));
 
-	LPCWSTR wpptr = wpath.c_str();
-	HMODULE datafile = LoadLibraryExW(wpptr, 0, LOAD_LIBRARY_AS_DATAFILE | LOAD_LIBRARY_AS_IMAGE_RESOURCE); // Load the DLL as a data file
-	if (datafile == NULL)
+	if (!m_handle)
 	{
-		NS::log::PLUGINSYS->info("Failed to load library '{}': ", std::system_category().message(GetLastError()));
-		return std::nullopt;
+		NS::log::PLUGINSYS->error("Failed to load plugin '{}' (Error: {})", path, GetLastError());
+		return;
 	}
-	HRSRC manifestResource = FindResourceW(datafile, MAKEINTRESOURCEW(IDR_RCDATA1), RT_RCDATA);
 
-	if (manifestResource == NULL)
-	{
-		NS::log::PLUGINSYS->info("Could not find manifest for library '{}'", pathstring);
-		freeLibrary(datafile);
-		return std::nullopt;
-	}
-	HGLOBAL myResourceData = LoadResource(datafile, manifestResource);
-	if (myResourceData == NULL)
-	{
-		NS::log::PLUGINSYS->error("Failed to load manifest from library '{}'", pathstring);
-		freeLibrary(datafile);
-		return std::nullopt;
-	}
-	int manifestSize = SizeofResource(datafile, manifestResource);
-	std::string manifest = std::string((const char*)LockResource(myResourceData), 0, manifestSize);
-	freeLibrary(datafile);
+	m_initData = {.pluginHandle = m_handle};
 
-	rapidjson_document manifestJSON;
-	manifestJSON.Parse(manifest.c_str());
+	CreateInterfaceFn CreatePluginInterface = (CreateInterfaceFn)GetProcAddress(m_handle, "CreateInterface");
 
-	if (manifestJSON.HasParseError())
+	if (!CreatePluginInterface)
 	{
-		NS::log::PLUGINSYS->error("Manifest for '{}' was invalid", pathstring);
-		return std::nullopt;
-	}
-	if (!manifestJSON.HasMember("name"))
-	{
-		NS::log::PLUGINSYS->error("'{}' is missing a name in its manifest", pathstring);
-		return std::nullopt;
-	}
-	if (!manifestJSON.HasMember("displayname"))
-	{
-		NS::log::PLUGINSYS->error("'{}' is missing a displayname in its manifest", pathstring);
-		return std::nullopt;
-	}
-	if (!manifestJSON.HasMember("description"))
-	{
-		NS::log::PLUGINSYS->error("'{}' is missing a description in its manifest", pathstring);
-		return std::nullopt;
-	}
-	if (!manifestJSON.HasMember("api_version"))
-	{
-		NS::log::PLUGINSYS->error("'{}' is missing a api_version in its manifest", pathstring);
-		return std::nullopt;
-	}
-	if (!manifestJSON.HasMember("version"))
-	{
-		NS::log::PLUGINSYS->error("'{}' is missing a version in its manifest", pathstring);
-		return std::nullopt;
+		NS::log::PLUGINSYS->error("Plugin at '{}' does not expose CreateInterface()", path);
+		return;
 	}
-	if (!manifestJSON.HasMember("run_on_server"))
+
+	m_pluginId = (IPluginId*)CreatePluginInterface(PLUGIN_ID_VERSION, 0);
+
+	if (!m_pluginId)
 	{
-		NS::log::PLUGINSYS->error("'{}' is missing 'run_on_server' in its manifest", pathstring);
-		return std::nullopt;
+		NS::log::PLUGINSYS->error("Could not load IPluginId interface of plugin at '{}'", path);
+		return;
 	}
-	if (!manifestJSON.HasMember("run_on_client"))
+
+	const char* name = m_pluginId->GetString(PluginString::NAME);
+	const char* logName = m_pluginId->GetString(PluginString::LOG_NAME);
+	const char* dependencyName = m_pluginId->GetString(PluginString::DEPENDENCY_NAME);
+	int64_t context = m_pluginId->GetField(PluginField::CONTEXT);
+
+	m_runOnServer = context & PluginContext::DEDICATED;
+	m_runOnClient = context & PluginContext::CLIENT;
+
+	m_name = std::string(name);
+	m_logName = std::string(logName);
+	m_dependencyName = std::string(dependencyName);
+
+	if (!name)
 	{
-		NS::log::PLUGINSYS->error("'{}' is missing 'run_on_client' in its manifest", pathstring);
-		return std::nullopt;
+		NS::log::PLUGINSYS->error("Could not load name of plugin at '{}'", path);
+		return;
 	}
-	auto test = manifestJSON["api_version"].GetString();
-	if (strcmp(manifestJSON["api_version"].GetString(), std::to_string(ABI_VERSION).c_str()))
+
+	if (!logName)
 	{
-		NS::log::PLUGINSYS->error(
-			"'{}' has an incompatible API version number in its manifest. Current ABI version is '{}'", pathstring, ABI_VERSION);
-		return std::nullopt;
+		NS::log::PLUGINSYS->error("Could not load logName of plugin {}", name);
+		return;
 	}
-	// Passed all checks, going to actually load it now
 
-	HMODULE pluginLib =
-		LoadLibraryExW(wpptr, 0, LOAD_LIBRARY_SEARCH_USER_DIRS | LOAD_LIBRARY_SEARCH_DEFAULT_DIRS); // Load the DLL with lib folders
-	if (pluginLib == NULL)
+	if (!dependencyName)
 	{
-		NS::log::PLUGINSYS->info("Failed to load library '{}': ", std::system_category().message(GetLastError()));
-		return std::nullopt;
+		NS::log::PLUGINSYS->error("Could not load dependencyName of plugin {}", name);
+		return;
 	}
-	plugin.init = (PLUGIN_INIT_TYPE)GetProcAddress(pluginLib, "PLUGIN_INIT");
-	if (plugin.init == NULL)
+
+	if (!isValidSquirrelIdentifier(m_dependencyName))
 	{
-		NS::log::PLUGINSYS->info("Library '{}' has no function 'PLUGIN_INIT'", pathstring);
-		return std::nullopt;
+		NS::log::PLUGINSYS->error("Dependency name \"{}\" of plugin {} is not valid", dependencyName, name);
+		return;
 	}
-	NS::log::PLUGINSYS->info("Succesfully loaded {}", pathstring);
-
-	plugin.name = manifestJSON["name"].GetString();
-	plugin.displayName = manifestJSON["displayname"].GetString();
-	plugin.description = manifestJSON["description"].GetString();
-	plugin.api_version = manifestJSON["api_version"].GetString();
-	plugin.version = manifestJSON["version"].GetString();
 
-	plugin.run_on_client = manifestJSON["run_on_client"].GetBool();
-	plugin.run_on_server = manifestJSON["run_on_server"].GetBool();
+	m_callbacks = (IPluginCallbacks*)CreatePluginInterface("PluginCallbacks001", 0);
 
-	if (!plugin.run_on_server && IsDedicatedServer())
-		return std::nullopt;
-
-	if (manifestJSON.HasMember("dependencyName"))
+	if (!m_callbacks)
 	{
-		plugin.dependencyName = manifestJSON["dependencyName"].GetString();
+		NS::log::PLUGINSYS->error("Could not create callback interface of plugin {}", name);
+		return;
 	}
-	else
+
+	m_logger = std::make_shared<ColoredLogger>(m_logName, NS::Colors::PLUGIN);
+	RegisterLogger(m_logger);
+
+	if (IsDedicatedServer() && !m_runOnServer)
 	{
-		plugin.dependencyName = plugin.name;
+		NS::log::PLUGINSYS->info("Unloading {} because it's not supposed to run on dedicated servers", m_name);
+		return;
 	}
 
-	if (std::find_if(
-			plugin.dependencyName.begin(),
-			plugin.dependencyName.end(),
-			[&](char c) -> bool { return !((c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z') || (c >= '0' && c <= '9') || c == '_'); }) !=
-		plugin.dependencyName.end())
+	if (!IsDedicatedServer() && !m_runOnClient)
 	{
-		NS::log::PLUGINSYS->warn("Dependency string \"{}\" in {} is not valid a squirrel constant!", plugin.dependencyName, plugin.name);
+		NS::log::PLUGINSYS->info("Unloading {} because it's only supposed to run on dedicated servers", m_name);
+		return;
 	}
 
-	plugin.init_sqvm_client = (PLUGIN_INIT_SQVM_TYPE)GetProcAddress(pluginLib, "PLUGIN_INIT_SQVM_CLIENT");
-	plugin.init_sqvm_server = (PLUGIN_INIT_SQVM_TYPE)GetProcAddress(pluginLib, "PLUGIN_INIT_SQVM_SERVER");
-	plugin.inform_sqvm_created = (PLUGIN_INFORM_SQVM_CREATED_TYPE)GetProcAddress(pluginLib, "PLUGIN_INFORM_SQVM_CREATED");
-	plugin.inform_sqvm_destroyed = (PLUGIN_INFORM_SQVM_DESTROYED_TYPE)GetProcAddress(pluginLib, "PLUGIN_INFORM_SQVM_DESTROYED");
-
-	plugin.inform_dll_load = (PLUGIN_INFORM_DLL_LOAD_TYPE)GetProcAddress(pluginLib, "PLUGIN_INFORM_DLL_LOAD");
-
-	plugin.run_frame = (PLUGIN_RUNFRAME)GetProcAddress(pluginLib, "PLUGIN_RUNFRAME");
-
-	plugin.handle = (int)m_vLoadedPlugins.size();
-	plugin.logger = std::make_shared<ColoredLogger>(plugin.displayName.c_str(), NS::Colors::PLUGIN);
-	RegisterLogger(plugin.logger);
-	NS::log::PLUGINSYS->info("Loading plugin {} version {}", plugin.displayName, plugin.version);
-	m_vLoadedPlugins.push_back(plugin);
-
-	plugin.init(funcs, data);
-
-	return plugin;
+	m_valid = true;
 }
 
-inline void FindPlugins(fs::path pluginPath, std::vector<fs::path>& paths)
+bool Plugin::Unload() const
 {
-	// ensure dirs exist
-	if (!fs::exists(pluginPath) || !fs::is_directory(pluginPath))
+	if (!m_handle)
+		return true;
+
+	if (IsValid())
 	{
-		return;
+		bool unloaded = m_callbacks->Unload();
+
+		if (!unloaded)
+			return false;
 	}
 
-	for (const fs::directory_entry& entry : fs::directory_iterator(pluginPath))
+	if (!FreeLibrary(m_handle))
 	{
-		if (fs::is_regular_file(entry) && entry.path().extension() == ".dll")
-			paths.emplace_back(entry.path());
+		NS::log::PLUGINSYS->error("Failed to unload plugin at '{}'", m_location);
+		return false;
 	}
+
+	g_pPluginManager->RemovePlugin(m_handle);
+	return true;
 }
 
-bool PluginManager::LoadPlugins()
+void Plugin::Reload() const
 {
-	if (strstr(GetCommandLineA(), "-noplugins") != NULL)
-	{
-		NS::log::PLUGINSYS->warn("-noplugins detected; skipping loading plugins");
-		return false;
-	}
+	bool unloaded = Unload();
 
-	fs::create_directories(GetThunderstoreModFolderPath());
+	if (!unloaded)
+		return;
 
-	std::vector<fs::path> paths;
+	g_pPluginManager->LoadPlugin(fs::path(m_location), true);
+}
 
-	pluginPath = GetNorthstarPrefix() + "\\plugins";
+void Plugin::Log(spdlog::level::level_enum level, char* msg) const
+{
+	m_logger->log(level, msg);
+}
 
-	PluginNorthstarData data {};
-	std::string ns_version {version};
+bool Plugin::IsValid() const
+{
+	return m_valid && m_pCreateInterface && m_pluginId && m_callbacks && m_handle;
+}
 
-	PluginInitFuncs funcs {};
-	funcs.logger = PLUGIN_LOG;
-	funcs.relayInviteFunc = nullptr;
-	funcs.createObject = CreateObject;
+const std::string& Plugin::GetName() const
+{
+	return m_name;
+}
 
-	data.version = ns_version.c_str();
-	data.northstarModule = g_NorthstarModule;
+const std::string& Plugin::GetLogName() const
+{
+	return m_logName;
+}
 
-	fs::path libPath = fs::absolute(pluginPath + "\\lib");
-	if (fs::exists(libPath) && fs::is_directory(libPath))
-		AddDllDirectory(libPath.wstring().c_str());
+const std::string& Plugin::GetDependencyName() const
+{
+	return m_dependencyName;
+}
 
-	FindPlugins(pluginPath, paths);
+const std::string& Plugin::GetLocation() const
+{
+	return m_location;
+}
 
-	// Special case for Thunderstore mods dir
-	std::filesystem::directory_iterator thunderstoreModsDir = fs::directory_iterator(GetThunderstoreModFolderPath());
-	// Set up regex for `AUTHOR-MOD-VERSION` pattern
-	std::regex pattern(R"(.*\\([a-zA-Z0-9_]+)-([a-zA-Z0-9_]+)-(\d+\.\d+\.\d+))");
-	for (fs::directory_entry dir : thunderstoreModsDir)
-	{
-		fs::path pluginsDir = dir.path() / "plugins";
-		// Use regex to match `AUTHOR-MOD-VERSION` pattern
-		if (!std::regex_match(dir.path().string(), pattern))
-		{
-			spdlog::warn("The following directory did not match 'AUTHOR-MOD-VERSION': {}", dir.path().string());
-			continue; // skip loading package that doesn't match
-		}
-
-		fs::path libDir = fs::absolute(pluginsDir / "lib");
-		if (fs::exists(libDir) && fs::is_directory(libDir))
-			AddDllDirectory(libDir.wstring().c_str());
-
-		FindPlugins(pluginsDir, paths);
-	}
+bool Plugin::ShouldRunOnServer() const
+{
+	return m_runOnServer;
+}
 
-	if (paths.empty())
-	{
-		NS::log::PLUGINSYS->warn("Could not find any plugins. Skipped loading plugins");
-		return false;
-	}
+bool Plugin::ShouldRunOnClient() const
+{
+	return m_runOnClient;
+}
 
-	for (fs::path path : paths)
-	{
-		if (LoadPlugin(path, &funcs, &data))
-			data.pluginHandle += 1;
-	}
-	return true;
+void* Plugin::CreateInterface(const char* name, int* status) const
+{
+	return m_pCreateInterface(name, status);
 }
 
-void PluginManager::InformSQVMLoad(ScriptContext context, SquirrelFunctions* s)
+void Plugin::Init(bool reloaded) const
 {
-	for (auto plugin : m_vLoadedPlugins)
-	{
-		if (context == ScriptContext::CLIENT && plugin.init_sqvm_client != NULL)
-		{
-			plugin.init_sqvm_client(s);
-		}
-		else if (context == ScriptContext::SERVER && plugin.init_sqvm_server != NULL)
-		{
-			plugin.init_sqvm_server(s);
-		}
-	}
+	m_callbacks->Init(g_NorthstarModule, &m_initData, reloaded);
 }
 
-void PluginManager::InformSQVMCreated(ScriptContext context, CSquirrelVM* sqvm)
+void Plugin::Finalize() const
 {
-	for (auto plugin : m_vLoadedPlugins)
-	{
-		if (plugin.inform_sqvm_created != NULL)
-		{
-			plugin.inform_sqvm_created(context, sqvm);
-		}
-	}
+	m_callbacks->Finalize();
 }
 
-void PluginManager::InformSQVMDestroyed(ScriptContext context)
+void Plugin::OnSqvmCreated(CSquirrelVM* sqvm) const
 {
-	for (auto plugin : m_vLoadedPlugins)
-	{
-		if (plugin.inform_sqvm_destroyed != NULL)
-		{
-			plugin.inform_sqvm_destroyed(context);
-		}
-	}
+	m_callbacks->OnSqvmCreated(sqvm);
 }
 
-void PluginManager::InformDLLLoad(const char* dll, void* data, void* dllPtr)
+void Plugin::OnSqvmDestroying(CSquirrelVM* sqvm) const
 {
-	for (auto plugin : m_vLoadedPlugins)
-	{
-		if (plugin.inform_dll_load != NULL)
-		{
-			plugin.inform_dll_load(dll, (PluginEngineData*)data, dllPtr);
-		}
-	}
+	NS::log::PLUGINSYS->info("destroying sqvm {}", sqvm->vmContext);
+	m_callbacks->OnSqvmDestroying(sqvm);
 }
 
-void PluginManager::RunFrame()
+void Plugin::OnLibraryLoaded(HMODULE module, const char* name) const
 {
-	for (auto plugin : m_vLoadedPlugins)
-	{
-		if (plugin.run_frame != NULL)
-		{
-			plugin.run_frame();
-		}
-	}
+	m_callbacks->OnLibraryLoaded(module, name);
+}
+
+void Plugin::RunFrame() const
+{
+	m_callbacks->RunFrame();
 }
diff --git a/primedev/plugins/plugins.h b/primedev/plugins/plugins.h
index 4e841f27..d004038c 100644
--- a/primedev/plugins/plugins.h
+++ b/primedev/plugins/plugins.h
@@ -1,59 +1,50 @@
 #pragma once
-#include "plugin_abi.h"
-
-const int IDR_RCDATA1 = 101;
+#include "core/sourceinterface.h"
+#include "plugins/interfaces/interface.h"
+#include "plugins/interfaces/IPluginId.h"
+#include "plugins/interfaces/IPluginCallbacks.h"
 
 class Plugin
 {
-public:
-	std::string name;
-	std::string displayName;
-	std::string dependencyName;
-	std::string description;
-
-	std::string api_version;
-	std::string version;
-
-	// For now this is just implemented as the index into the plugins array
-	// Maybe a bit shit but it works
-	int handle;
+private:
+	CreateInterfaceFn m_pCreateInterface;
+	IPluginId* m_pluginId = 0;
+	IPluginCallbacks* m_callbacks = 0;
 
-	std::shared_ptr<ColoredLogger> logger;
+	std::shared_ptr<ColoredLogger> m_logger;
 
-	bool run_on_client = false;
-	bool run_on_server = false;
+	bool m_valid = false;
+	std::string m_name;
+	std::string m_logName;
+	std::string m_dependencyName;
+	std::string m_location; // path of the dll
+	bool m_runOnServer;
+	bool m_runOnClient;
 
 public:
-	PLUGIN_INIT_TYPE init;
-	PLUGIN_INIT_SQVM_TYPE init_sqvm_client;
-	PLUGIN_INIT_SQVM_TYPE init_sqvm_server;
-	PLUGIN_INFORM_SQVM_CREATED_TYPE inform_sqvm_created;
-	PLUGIN_INFORM_SQVM_DESTROYED_TYPE inform_sqvm_destroyed;
-
-	PLUGIN_INFORM_DLL_LOAD_TYPE inform_dll_load;
-
-	PLUGIN_RUNFRAME run_frame;
+	HMODULE m_handle;
+	PluginNorthstarData m_initData;
+
+	Plugin(std::string path);
+	bool Unload() const;
+	void Reload() const;
+
+	// sys
+	void Log(spdlog::level::level_enum level, char* msg) const;
+
+	// callbacks
+	bool IsValid() const;
+	const std::string& GetName() const;
+	const std::string& GetLogName() const;
+	const std::string& GetDependencyName() const;
+	const std::string& GetLocation() const;
+	bool ShouldRunOnServer() const;
+	bool ShouldRunOnClient() const;
+	void* CreateInterface(const char* pName, int* pStatus) const;
+	void Init(bool reloaded) const;
+	void Finalize() const;
+	void OnSqvmCreated(CSquirrelVM* sqvm) const;
+	void OnSqvmDestroying(CSquirrelVM* sqvm) const;
+	void OnLibraryLoaded(HMODULE module, const char* name) const;
+	void RunFrame() const;
 };
-
-class PluginManager
-{
-public:
-	std::vector<Plugin> m_vLoadedPlugins;
-
-public:
-	bool LoadPlugins();
-	std::optional<Plugin> LoadPlugin(fs::path path, PluginInitFuncs* funcs, PluginNorthstarData* data);
-
-	void InformSQVMLoad(ScriptContext context, SquirrelFunctions* s);
-	void InformSQVMCreated(ScriptContext context, CSquirrelVM* sqvm);
-	void InformSQVMDestroyed(ScriptContext context);
-
-	void InformDLLLoad(const char* dll, void* data, void* dllPtr);
-
-	void RunFrame();
-
-private:
-	std::string pluginPath;
-};
-
-extern PluginManager* g_pPluginManager;