Use a database for mod storage (#11763)

3 files changed, 20 insertions, 74 deletions

diff --git a/src/content/mods.cpp b/src/content/mods.cpp
index 6f088a5b3..455506967 100644
--- a/src/content/mods.cpp
+++ b/src/content/mods.cpp
@@ -22,6 +22,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include <json/json.h>
 #include <algorithm>
 #include "content/mods.h"
+#include "database/database.h"
 #include "filesys.h"
 #include "log.h"
 #include "content/subgames.h"
@@ -422,83 +423,29 @@ ClientModConfiguration::ClientModConfiguration(const std::string &path) :
 }
 #endif
 
-ModMetadata::ModMetadata(const std::string &mod_name) : m_mod_name(mod_name)
+ModMetadata::ModMetadata(const std::string &mod_name, ModMetadataDatabase *database):
+	m_mod_name(mod_name), m_database(database)
 {
+	m_database->getModEntries(m_mod_name, &m_stringvars);
 }
 
 void ModMetadata::clear()
 {
+	for (const auto &pair : m_stringvars) {
+		m_database->removeModEntry(m_mod_name, pair.first);
+	}
 	Metadata::clear();
-	m_modified = true;
 }
 
-bool ModMetadata::save(const std::string &root_path)
+bool ModMetadata::setString(const std::string &name, const std::string &var)
 {
-	Json::Value json;
-	for (StringMap::const_iterator it = m_stringvars.begin();
-			it != m_stringvars.end(); ++it) {
-		json[it->first] = it->second;
-	}
-
-	if (!fs::PathExists(root_path)) {
-		if (!fs::CreateAllDirs(root_path)) {
-			errorstream << "ModMetadata[" << m_mod_name
-				    << "]: Unable to save. '" << root_path
-				    << "' tree cannot be created." << std::endl;
-			return false;
+	if (Metadata::setString(name, var)) {
+		if (var.empty()) {
+			m_database->removeModEntry(m_mod_name, name);
+		} else {
+			m_database->setModEntry(m_mod_name, name, var);
 		}
-	} else if (!fs::IsDir(root_path)) {
-		errorstream << "ModMetadata[" << m_mod_name << "]: Unable to save. '"
-			    << root_path << "' is not a directory." << std::endl;
-		return false;
-	}
-
-	bool w_ok = fs::safeWriteToFile(
-			root_path + DIR_DELIM + m_mod_name, fastWriteJson(json));
-
-	if (w_ok) {
-		m_modified = false;
-	} else {
-		errorstream << "ModMetadata[" << m_mod_name << "]: failed write file."
-			    << std::endl;
-	}
-	return w_ok;
-}
-
-bool ModMetadata::load(const std::string &root_path)
-{
-	m_stringvars.clear();
-
-	std::ifstream is((root_path + DIR_DELIM + m_mod_name).c_str(),
-			std::ios_base::binary);
-	if (!is.good()) {
-		return false;
-	}
-
-	Json::Value root;
-	Json::CharReaderBuilder builder;
-	builder.settings_["collectComments"] = false;
-	std::string errs;
-
-	if (!Json::parseFromStream(builder, is, &root, &errs)) {
-		errorstream << "ModMetadata[" << m_mod_name
-			    << "]: failed read data "
-			       "(Json decoding failure). Message: "
-			    << errs << std::endl;
-		return false;
-	}
-
-	const Json::Value::Members attr_list = root.getMemberNames();
-	for (const auto &it : attr_list) {
-		Json::Value attr_value = root[it];
-		m_stringvars[it] = attr_value.asString();
+		return true;
 	}
-
-	return true;
-}
-
-bool ModMetadata::setString(const std::string &name, const std::string &var)
-{
-	m_modified = Metadata::setString(name, var);
-	return m_modified;
+	return false;
 }
diff --git a/src/content/mods.h b/src/content/mods.h
index b56a97edb..dd3b6e0e6 100644
--- a/src/content/mods.h
+++ b/src/content/mods.h
@@ -31,6 +31,8 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "config.h"
 #include "metadata.h"
 
+class ModMetadataDatabase;
+
 #define MODNAME_ALLOWED_CHARS "abcdefghijklmnopqrstuvwxyz0123456789_"
 
 struct ModSpec
@@ -149,20 +151,16 @@ class ModMetadata : public Metadata
 {
 public:
 	ModMetadata() = delete;
-	ModMetadata(const std::string &mod_name);
+	ModMetadata(const std::string &mod_name, ModMetadataDatabase *database);
 	~ModMetadata() = default;
 
 	virtual void clear();
 
-	bool save(const std::string &root_path);
-	bool load(const std::string &root_path);
-
-	bool isModified() const { return m_modified; }
 	const std::string &getModName() const { return m_mod_name; }
 
 	virtual bool setString(const std::string &name, const std::string &var);
 
 private:
 	std::string m_mod_name;
-	bool m_modified = false;
+	ModMetadataDatabase *m_database;
 };
diff --git a/src/content/subgames.cpp b/src/content/subgames.cpp
index 30447c838..e834f40cd 100644
--- a/src/content/subgames.cpp
+++ b/src/content/subgames.cpp
@@ -358,6 +358,7 @@ void loadGameConfAndInitWorld(const std::string &path, const std::string &name,
 		conf.set("backend", "sqlite3");
 		conf.set("player_backend", "sqlite3");
 		conf.set("auth_backend", "sqlite3");
+		conf.set("mod_storage_backend", "sqlite3");
 		conf.setBool("creative_mode", g_settings->getBool("creative_mode"));
 		conf.setBool("enable_damage", g_settings->getBool("enable_damage"));