From ea2918767afa3c00c8dfa7dd7d9960a80a460eb9 Mon Sep 17 00:00:00 2001
From: Dmytro Ivanov <dmytro.ivanov@epicgames.com>
Date: Wed, 9 Apr 2025 15:35:37 +0200
Subject: Added config, versioning and logging for plugins

---
 src/zenserver/config.cpp | 72 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 72 insertions(+)

(limited to 'src/zenserver/config.cpp')

diff --git a/src/zenserver/config.cpp b/src/zenserver/config.cpp
index fecc1043a..9a12719c0 100644
--- a/src/zenserver/config.cpp
+++ b/src/zenserver/config.cpp
@@ -22,6 +22,7 @@ ZEN_THIRD_PARTY_INCLUDES_START
 #include <fmt/ranges.h>
 #include <zencore/logging.h>
 #include <cxxopts.hpp>
+#include <json11.hpp>
 #include <sol/sol.hpp>
 ZEN_THIRD_PARTY_INCLUDES_END
 
@@ -349,6 +350,7 @@ ParseConfigFile(const std::filesystem::path& Path,
 	LuaOptions.AddOption("server.datadir"sv, ServerOptions.DataDir, "data-dir"sv);
 	LuaOptions.AddOption("server.contentdir"sv, ServerOptions.ContentDir, "content-dir"sv);
 	LuaOptions.AddOption("server.abslog"sv, ServerOptions.AbsLogFile, "abslog"sv);
+	LuaOptions.AddOption("server.pluginsconfigfile"sv, ServerOptions.PluginsConfigFile, "plugins-config"sv);
 	LuaOptions.AddOption("server.debug"sv, ServerOptions.IsDebug, "debug"sv);
 	LuaOptions.AddOption("server.clean"sv, ServerOptions.IsCleanStart, "clean"sv);
 	LuaOptions.AddOption("server.noconsole"sv, ServerOptions.NoConsoleOutput, "quiet"sv);
@@ -514,6 +516,68 @@ ParseConfigFile(const std::filesystem::path& Path,
 	}
 }
 
+void
+ParsePluginsConfigFile(const std::filesystem::path& Path, ZenServerOptions& ServerOptions, int BasePort)
+{
+	using namespace std::literals;
+
+	IoBuffer	 Body = IoBufferBuilder::MakeFromFile(Path);
+	std::string	 JsonText(reinterpret_cast<const char*>(Body.GetData()), Body.GetSize());
+	std::string	 JsonError;
+	json11::Json PluginsInfo = json11::Json::parse(JsonText, JsonError);
+	if (!JsonError.empty())
+	{
+		throw std::runtime_error(fmt::format("failed parsing json file '{}'. Reason: '{}'", Path, JsonError));
+	}
+	for (const json11::Json& PluginInfo : PluginsInfo.array_items())
+	{
+		if (!PluginInfo.is_object())
+		{
+			throw std::runtime_error(fmt::format("the json file '{}' does not contain a valid plugin definition, object expected, got '{}'",
+												 Path,
+												 PluginInfo.dump()));
+		}
+
+		HttpServerPluginConfig Config = {};
+
+		bool bNeedsPort = true;
+
+		for (const std::pair<const std::string, json11::Json>& Items : PluginInfo.object_items())
+		{
+			if (!Items.second.is_string())
+			{
+				throw std::runtime_error(
+					fmt::format("the json file '{}' does not contain a valid plugins definition, string expected, got '{}'",
+								Path,
+								Items.second.dump()));
+			}
+
+			const std::string& Name	 = Items.first;
+			const std::string& Value = Items.second.string_value();
+
+			if (Name == "name"sv)
+				Config.PluginName = Value;
+			else
+			{
+				Config.PluginOptions.push_back({Name, Value});
+
+				if (Name == "port"sv)
+				{
+					bNeedsPort = false;
+				}
+			}
+		}
+
+		// add a default base port in case if json config didn't provide one
+		if (bNeedsPort)
+		{
+			Config.PluginOptions.push_back({"port", std::to_string(BasePort)});
+		}
+
+		ServerOptions.HttpServerConfig.PluginConfigs.push_back(Config);
+	}
+}
+
 void
 ParseCliOptions(int argc, char* argv[], ZenServerOptions& ServerOptions)
 {
@@ -546,6 +610,7 @@ ParseCliOptions(int argc, char* argv[], ZenServerOptions& ServerOptions)
 	std::string ContentDir;
 	std::string AbsLogFile;
 	std::string ConfigFile;
+	std::string PluginsConfigFile;
 	std::string OutputConfigFile;
 	std::string BaseSnapshotDir;
 
@@ -573,6 +638,7 @@ ParseCliOptions(int argc, char* argv[], ZenServerOptions& ServerOptions)
 						  "Exit immediately after initialization is complete",
 						  cxxopts::value<bool>(ServerOptions.IsPowerCycle));
 	options.add_options()("config", "Path to Lua config file", cxxopts::value<std::string>(ConfigFile));
+	options.add_options()("plugins-config", "Path to plugins config file", cxxopts::value<std::string>(PluginsConfigFile));
 	options.add_options()("write-config", "Path to output Lua config file", cxxopts::value<std::string>(OutputConfigFile));
 	options.add_options()("no-sentry",
 						  "Disable Sentry crash handler",
@@ -1096,6 +1162,7 @@ ParseCliOptions(int argc, char* argv[], ZenServerOptions& ServerOptions)
 		ServerOptions.ContentDir					  = MakeSafeAbsolutePath(ContentDir);
 		ServerOptions.AbsLogFile					  = MakeSafeAbsolutePath(AbsLogFile);
 		ServerOptions.ConfigFile					  = MakeSafeAbsolutePath(ConfigFile);
+		ServerOptions.PluginsConfigFile				  = MakeSafeAbsolutePath(PluginsConfigFile);
 		ServerOptions.UpstreamCacheConfig.CachePolicy = ParseUpstreamCachePolicy(UpstreamCachePolicyOptions);
 
 		if (!BaseSnapshotDir.empty())
@@ -1129,6 +1196,11 @@ ParseCliOptions(int argc, char* argv[], ZenServerOptions& ServerOptions)
 			ParseConfigFile(ServerOptions.DataDir / "zen_cfg.lua", ServerOptions, Result, OutputConfigFile);
 		}
 
+		if (!ServerOptions.PluginsConfigFile.empty())
+		{
+			ParsePluginsConfigFile(ServerOptions.PluginsConfigFile, ServerOptions, ServerOptions.BasePort);
+		}
+
 		ValidateOptions(ServerOptions);
 	}
 	catch (const zen::OptionParseException& e)
-- 
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