[App/Discord] Rework how rich presence is managed.

Updating rich presence state every time the window title changes
is a bad idea(tm).

src/xenia/app/discord/discord_presence.cc

@@ -20,7 +20,7 @@ void HandleDiscordJoinGame(const char* joinSecret) {}
 void HandleDiscordJoinRequest(const DiscordUser* request) {}
 void HandleDiscordSpectateGame(const char* spectateSecret) {}
 
-void DiscordPresence::InitializeDiscord() {
+void DiscordPresence::Initialize() {
   DiscordEventHandlers handlers = {};
   handlers.ready = &HandleDiscordReady;
   handlers.errored = &HandleDiscordError;
@@ -39,7 +39,7 @@ void DiscordPresence::NotPlaying() {
   Discord_UpdatePresence(&discordPresence);
 }
 
-void DiscordPresence::PlayingTitle(std::wstring game_title) {
+void DiscordPresence::PlayingTitle(const std::wstring& game_title) {
   auto discord_game_title = xe::to_string(game_title);
   DiscordRichPresence discordPresence = {};
   discordPresence.state = "In Game";
@@ -50,7 +50,7 @@ void DiscordPresence::PlayingTitle(std::wstring game_title) {
   Discord_UpdatePresence(&discordPresence);
 }
 
-void DiscordPresence::ShutdownDiscord() { Discord_Shutdown(); }
+void DiscordPresence::Shutdown() { Discord_Shutdown(); }
 
 }  // namespace discord
 }  // namespace xe

src/xenia/app/discord/discord_presence.h

@@ -17,10 +17,10 @@ namespace discord {
 
 class DiscordPresence {
  public:
-  static void InitializeDiscord();
+  static void Initialize();
   static void NotPlaying();
-  static void PlayingTitle(std::wstring game_title);
-  static void ShutdownDiscord();
+  static void PlayingTitle(const std::wstring& game_title);
+  static void Shutdown();
 };
 
 }  // namespace discord

src/xenia/app/emulator_window.cc

@@ -13,7 +13,6 @@
 #include "build/version.h"
 
 #include "third_party/imgui/imgui.h"
-#include "xenia/app/discord/discord_presence.h"
 #include "xenia/base/clock.h"
 #include "xenia/base/cvar.h"
 #include "xenia/base/debugging.h"
@@ -29,7 +28,6 @@
 #include "xenia/ui/imgui_drawer.h"
 
 DECLARE_bool(debug);
-DEFINE_bool(discord, false, "Enable Discord rich presence", "General");
 
 namespace xe {
 namespace app {
@@ -85,11 +83,6 @@ bool EmulatorWindow::Initialize() {
     return false;
   }
 
-  if (cvars::discord) {
-    discord::DiscordPresence::InitializeDiscord();
-    discord::DiscordPresence::NotPlaying();
-  }
-
   UpdateTitle();
 
   window_->on_closed.AddListener([this](UIEvent* e) { loop_->Quit(); });
@@ -344,9 +337,6 @@ void EmulatorWindow::FileOpen() {
 void EmulatorWindow::FileClose() {
   if (emulator_->is_title_open()) {
     emulator_->TerminateTitle();
-    if (cvars::discord) {
-      discord::DiscordPresence::NotPlaying();
-    }
   }
 }
 
@@ -444,9 +434,6 @@ void EmulatorWindow::UpdateTitle() {
     auto game_title = emulator()->game_title();
     title += xe::format_string(L" | [%.8X] %s", emulator()->title_id(),
                                game_title.c_str());
-    if (cvars::discord) {
-      discord::DiscordPresence::PlayingTitle(game_title);
-    }
   }
 
   auto graphics_system = emulator()->graphics_system();

src/xenia/app/xenia_main.cc

@@ -7,6 +7,7 @@
  ******************************************************************************
  */
 
+#include "xenia/app/discord/discord_presence.h"
 #include "xenia/app/emulator_window.h"
 #include "xenia/base/cvar.h"
 #include "xenia/base/debugging.h"
@@ -56,6 +57,8 @@ DEFINE_bool(mount_cache, false, "Enable cache mount", "General");
 CmdVar(target, "", "Specifies the target .xex or .iso to execute.");
 DECLARE_bool(debug);
 
+DEFINE_bool(discord, true, "Enable Discord rich presence", "General");
+
 namespace xe {
 namespace app {
 
@@ -145,6 +148,11 @@ int xenia_main(const std::vector<std::wstring>& args) {
   Profiler::Initialize();
   Profiler::ThreadEnter("main");
 
+  if (cvars::discord) {
+    discord::DiscordPresence::Initialize();
+    discord::DiscordPresence::NotPlaying();
+  }
+
   // Figure out where content should go.
   std::wstring content_root = xe::to_wstring(cvars::content_root);
   std::wstring config_folder;
@@ -256,11 +264,21 @@ int xenia_main(const std::vector<std::wstring>& args) {
   }
 
   auto evt = xe::threading::Event::CreateAutoResetEvent(false);
-  emulator->on_launch.AddListener([&]() {
+  emulator->on_launch.AddListener([&](auto title_id, const auto& game_title) {
+    if (cvars::discord) {
+      discord::DiscordPresence::PlayingTitle(
+          game_title.empty() ? L"Unknown Title" : game_title);
+    }
     emulator_window->UpdateTitle();
     evt->Set();
   });
 
+  emulator->on_terminate.AddListener([&]() {
+    if (cvars::discord) {
+      discord::DiscordPresence::NotPlaying();
+    }
+  });
+
   emulator_window->window()->on_closing.AddListener([&](ui::UIEvent* e) {
     // This needs to shut down before the graphics context.
     Profiler::Shutdown();
@@ -271,6 +289,10 @@ int xenia_main(const std::vector<std::wstring>& args) {
     exiting = true;
     evt->Set();
 
+    if (cvars::discord) {
+      discord::DiscordPresence::Shutdown();
+    }
+
     // TODO(DrChat): Remove this code and do a proper exit.
     XELOGI("Cheap-skate exit!");
     exit(0);
@@ -318,6 +340,10 @@ int xenia_main(const std::vector<std::wstring>& args) {
   debug_window.reset();
   emulator.reset();
 
+  if (cvars::discord) {
+    discord::DiscordPresence::Shutdown();
+  }
+
   Profiler::Dump();
   Profiler::Shutdown();
   emulator_window.reset();

src/xenia/emulator.cc

@@ -53,6 +53,7 @@ namespace xe {
 Emulator::Emulator(const std::wstring& command_line,
                    const std::wstring& content_root)
     : on_launch(),
+      on_terminate(),
       on_exit(),
       command_line_(command_line),
       content_root_(content_root),
@@ -233,6 +234,7 @@ X_STATUS Emulator::TerminateTitle() {
   kernel_state_->TerminateTitle();
   title_id_ = 0;
   game_title_ = L"";
+  on_terminate();
   return X_STATUS_SUCCESS;
 }
 
@@ -671,7 +673,7 @@ X_STATUS Emulator::CompleteLaunch(const std::wstring& path,
   }
 
   main_thread_ = main_thread;
-  on_launch();
+  on_launch(title_id_, game_title_);
 
   return X_STATUS_SUCCESS;
 }

src/xenia/emulator.h

@@ -145,7 +145,8 @@ class Emulator {
   void WaitUntilExit();
 
  public:
-  xe::Delegate<> on_launch;
+  xe::Delegate<uint32_t, const std::wstring&> on_launch;
+  xe::Delegate<> on_terminate;
   xe::Delegate<> on_exit;
 
  private: