Add Discord Rich Presence support

Source/Core/UICommon/DiscordPresence.cpp

@@ -0,0 +1,48 @@
+// Copyright 2018 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#ifdef USE_DISCORD_PRESENCE
+
+#include "UICommon/DiscordPresence.h"
+
+#include <ctime>
+#include <discord-rpc/include/discord_rpc.h>
+
+#include "Core/ConfigManager.h"
+
+#endif
+
+namespace Discord
+{
+void Init()
+{
+#ifdef USE_DISCORD_PRESENCE
+  DiscordEventHandlers handlers = {};
+  // The number is the client ID for Dolphin, it's used for images and the appication name
+  Discord_Initialize("450033159212630028", &handlers, 1, nullptr);
+  UpdateDiscordPresence();
+#endif
+}
+
+void UpdateDiscordPresence()
+{
+#ifdef USE_DISCORD_PRESENCE
+  const std::string& title = SConfig::GetInstance().GetTitleDescription();
+
+  DiscordRichPresence discord_presence = {};
+  discord_presence.largeImageKey = "dolphin_logo";
+  discord_presence.largeImageText = "Dolphin is an emulator for the GameCube and the Wii.";
+  discord_presence.details = title.empty() ? "Not in-game" : title.c_str();
+  discord_presence.startTimestamp = std::time(nullptr);
+  Discord_UpdatePresence(&discord_presence);
+#endif
+}
+
+void Shutdown()
+{
+#ifdef USE_DISCORD_PRESENCE
+  Discord_Shutdown();
+#endif
+}
+}  // namespace Discord