From e354b747f9b6d400daeaea98f8810630ad8ce72b Mon Sep 17 00:00:00 2001
From: Patric Stout <truebrain@openttd.org>
Date: Sun, 21 Jan 2024 10:53:26 +0100
Subject: [PATCH] Add: initialize plugin when found

---
 src/openttd.cpp            |  1 +
 src/social_integration.cpp | 63 ++++++++++++++++++++++++++++++++++++++
 src/social_integration.h   |  5 +++
 3 files changed, 69 insertions(+)

diff --git a/src/openttd.cpp b/src/openttd.cpp
index be2d05027a..79642f43b1 100644
--- a/src/openttd.cpp
+++ b/src/openttd.cpp
@@ -289,6 +289,7 @@ static void ShutdownGame()
 
 	if (_network_available) NetworkShutDown(); // Shut down the network and close any open connections
 
+	SocialIntegration::Shutdown();
 	DriverFactoryBase::ShutdownDrivers();
 
 	UnInitWindowSystem();
diff --git a/src/social_integration.cpp b/src/social_integration.cpp
index 4dd63a1e87..1fceeb82ab 100644
--- a/src/social_integration.cpp
+++ b/src/social_integration.cpp
@@ -20,6 +20,25 @@
 
 #include "safeguards.h"
 
+/**
+ * Container to track information per plugin.
+ */
+class InternalSocialIntegrationPlugin {
+public:
+	InternalSocialIntegrationPlugin(const std::string &filename, const std::string &basepath) : library(filename)
+	{
+		openttd_info.openttd_version = _openttd_revision;
+	}
+
+	OpenTTD_SocialIntegration_v1_PluginInfo plugin_info = {}; ///< Information supplied by plugin.
+	OpenTTD_SocialIntegration_v1_PluginApi plugin_api = {}; ///< API supplied by plugin.
+	OpenTTD_SocialIntegration_v1_OpenTTDInfo openttd_info = {}; ///< Information supplied by OpenTTD.
+
+	LibraryLoader library; ///< Library handle.
+};
+
+static std::vector<std::unique_ptr<InternalSocialIntegrationPlugin>> _plugins; ///< List of loaded plugins.
+
 /** Helper for scanning for files with SocialIntegration as extension */
 class SocialIntegrationFileScanner : FileScanner {
 public:
@@ -40,6 +59,45 @@ public:
 	{
 		std::string basepath = filename.substr(basepath_length);
 		Debug(misc, 1, "[Social Integration: {}] Loading ...", basepath);
+
+		auto &plugin = _plugins.emplace_back(std::make_unique<InternalSocialIntegrationPlugin>(filename, basepath));
+
+		if (plugin->library.HasError()) {
+			Debug(misc, 0, "[Social Integration: {}] Failed to load library: {}", basepath, plugin->library.GetLastError());
+			return false;
+		}
+
+		OpenTTD_SocialIntegration_v1_GetInfo getinfo_func = plugin->library.GetFunction("SocialIntegration_v1_GetInfo");
+		if (plugin->library.HasError()) {
+			Debug(misc, 0, "[Social Integration: {}] Failed to find symbol SocialPlugin_v1_GetInfo: {}", basepath, plugin->library.GetLastError());
+			return false;
+		}
+
+		OpenTTD_SocialIntegration_v1_Init init_func = plugin->library.GetFunction("SocialIntegration_v1_Init");
+		if (plugin->library.HasError()) {
+			Debug(misc, 0, "[Social Integration: {}] Failed to find symbol SocialPlugin_v1_Init: {}", basepath, plugin->library.GetLastError());
+			return false;
+		}
+
+		getinfo_func(&plugin->plugin_info);
+
+		auto state = init_func(&plugin->plugin_api, &plugin->openttd_info);
+		switch (state) {
+			case OTTD_SOCIAL_INTEGRATION_V1_INIT_SUCCESS:
+				Debug(misc, 1, "[Social Integration: {}] Loaded for {}: {} ({})", basepath, plugin->plugin_info.social_platform, plugin->plugin_info.name, plugin->plugin_info.version);
+				return true;
+
+			case OTTD_SOCIAL_INTEGRATION_V1_INIT_FAILED:
+				Debug(misc, 0, "[Social Integration: {}] Failed to initialize", basepath);
+				return false;
+
+			case OTTD_SOCIAL_INTEGRATION_V1_INIT_PLATFORM_NOT_RUNNING:
+				Debug(misc, 1, "[Social Integration: {}] Failed to initialize: {} is not running", basepath, plugin->plugin_info.social_platform);
+				return false;
+
+			default:
+				NOT_REACHED();
+		}
 	}
 };
 
@@ -48,3 +106,8 @@ void SocialIntegration::Initialize()
 	SocialIntegrationFileScanner fs;
 	fs.Scan();
 }
+
+void SocialIntegration::Shutdown()
+{
+	_plugins.clear();
+}
diff --git a/src/social_integration.h b/src/social_integration.h
index c03e90d56e..f8f7e9eb5c 100644
--- a/src/social_integration.h
+++ b/src/social_integration.h
@@ -16,6 +16,11 @@ public:
 	 * Initialize the social integration system, loading any social integration plugins that are available.
 	 */
 	static void Initialize();
+
+	/**
+	 * Shutdown the social integration system, and all social integration plugins that are loaded.
+	 */
+	static void Shutdown();
 };
 
 #endif /* SOCIAL_INTEGRATION_H */