From 0309af134ef01e0074057e0580c8155028998fcf Mon Sep 17 00:00:00 2001
From: GeckoEidechse <40122905+GeckoEidechse@users.noreply.github.com>
Date: Sun, 16 Jul 2023 21:23:50 +0200
Subject: Add support for loading Thunderstore mods natively (#503)

Allows for loading Thunderstore mods directly from a separate directory called `packages`.
---
 NorthstarDLL/mods/modmanager.cpp | 30 ++++++++++++++++++++++++++++++
 NorthstarDLL/mods/modmanager.h   |  2 ++
 2 files changed, 32 insertions(+)

diff --git a/NorthstarDLL/mods/modmanager.cpp b/NorthstarDLL/mods/modmanager.cpp
index d2cc8eb8..c54314c0 100644
--- a/NorthstarDLL/mods/modmanager.cpp
+++ b/NorthstarDLL/mods/modmanager.cpp
@@ -587,6 +587,7 @@ void ModManager::LoadMods()
 	// ensure dirs exist
 	fs::remove_all(GetCompiledAssetsPath());
 	fs::create_directories(GetModFolderPath());
+	fs::create_directories(GetThunderstoreModFolderPath());
 	fs::create_directories(GetRemoteModFolderPath());
 
 	m_DependencyConstants.clear();
@@ -616,6 +617,31 @@ void ModManager::LoadMods()
 			if (fs::exists(dir.path() / "mod.json"))
 				modDirs.push_back(dir.path());
 
+	// 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 modsDir = dir.path() / "mods"; // Check for mods folder in the Thunderstore mod
+		// 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': {}", modsDir.string());
+			continue; // skip loading mod that doesn't match
+		}
+		if (fs::exists(modsDir) && fs::is_directory(modsDir))
+		{
+			for (fs::directory_entry subDir : fs::directory_iterator(modsDir))
+			{
+				if (fs::exists(subDir.path() / "mod.json"))
+				{
+					modDirs.push_back(subDir.path());
+				}
+			}
+		}
+	}
+
 	for (fs::path modDir : modDirs)
 	{
 		// read mod json file
@@ -1049,6 +1075,10 @@ fs::path GetModFolderPath()
 {
 	return fs::path(GetNorthstarPrefix() + MOD_FOLDER_SUFFIX);
 }
+fs::path GetThunderstoreModFolderPath()
+{
+	return fs::path(GetNorthstarPrefix() + THUNDERSTORE_MOD_FOLDER_SUFFIX);
+}
 fs::path GetRemoteModFolderPath()
 {
 	return fs::path(GetNorthstarPrefix() + REMOTE_MOD_FOLDER_SUFFIX);
diff --git a/NorthstarDLL/mods/modmanager.h b/NorthstarDLL/mods/modmanager.h
index 33f4ceac..6f89f9f2 100644
--- a/NorthstarDLL/mods/modmanager.h
+++ b/NorthstarDLL/mods/modmanager.h
@@ -9,6 +9,7 @@
 #include <filesystem>
 
 const std::string MOD_FOLDER_SUFFIX = "/mods";
+const std::string THUNDERSTORE_MOD_FOLDER_SUFFIX = "/packages";
 const std::string REMOTE_MOD_FOLDER_SUFFIX = "/runtime/remote/mods";
 const fs::path MOD_OVERRIDE_DIR = "mod";
 const std::string COMPILED_ASSETS_SUFFIX = "/runtime/compiled";
@@ -176,6 +177,7 @@ class ModManager
 
 fs::path GetModFolderPath();
 fs::path GetRemoteModFolderPath();
+fs::path GetThunderstoreModFolderPath();
 fs::path GetCompiledAssetsPath();
 
 extern ModManager* g_pModManager;
-- 
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