mirror of https://github.com/OpenMW/openmw.git
Permanent storage for Lua data
Petr Mikheev
3 years ago
parent
781b014183
commit
a182fdeea1
@ -0,0 +1,103 @@
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#include <filesystem>
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#include <gmock/gmock.h>
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#include <gtest/gtest.h>
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#include <components/lua/storage.hpp>
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namespace
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{
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using namespace testing;
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template <typename T>
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T get(sol::state& lua, std::string luaCode)
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{
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return lua.safe_script("return " + luaCode).get<T>();
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}
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TEST(LuaUtilStorageTest, Basic)
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{
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sol::state mLua;
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LuaUtil::LuaStorage::initLuaBindings(mLua);
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LuaUtil::LuaStorage storage(mLua);
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mLua["mutable"] = storage.getMutableSection("test");
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mLua["ro"] = storage.getReadOnlySection("test");
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mLua.safe_script("mutable:set('x', 5)");
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EXPECT_EQ(get<int>(mLua, "mutable:get('x')"), 5);
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EXPECT_EQ(get<int>(mLua, "ro:get('x')"), 5);
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EXPECT_FALSE(get<bool>(mLua, "mutable:wasChanged()"));
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EXPECT_TRUE(get<bool>(mLua, "ro:wasChanged()"));
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EXPECT_FALSE(get<bool>(mLua, "ro:wasChanged()"));
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EXPECT_THROW(mLua.safe_script("ro:set('y', 3)"), std::exception);
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mLua.safe_script("t1 = mutable:asTable()");
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mLua.safe_script("t2 = ro:asTable()");
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EXPECT_EQ(get<int>(mLua, "t1.x"), 5);
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EXPECT_EQ(get<int>(mLua, "t2.x"), 5);
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mLua.safe_script("mutable:reset()");
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EXPECT_TRUE(get<bool>(mLua, "ro:get('x') == nil"));
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mLua.safe_script("mutable:reset({x=4, y=7})");
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EXPECT_EQ(get<int>(mLua, "ro:get('x')"), 4);
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EXPECT_EQ(get<int>(mLua, "ro:get('y')"), 7);
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EXPECT_FALSE(get<bool>(mLua, "mutable:wasChanged()"));
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EXPECT_TRUE(get<bool>(mLua, "ro:wasChanged()"));
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EXPECT_FALSE(get<bool>(mLua, "ro:wasChanged()"));
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}
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TEST(LuaUtilStorageTest, Table)
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{
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sol::state mLua;
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LuaUtil::LuaStorage::initLuaBindings(mLua);
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LuaUtil::LuaStorage storage(mLua);
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mLua["mutable"] = storage.getMutableSection("test");
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mLua["ro"] = storage.getReadOnlySection("test");
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mLua.safe_script("mutable:set('x', { y = 'abc', z = 7 })");
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EXPECT_EQ(get<int>(mLua, "mutable:get('x').z"), 7);
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EXPECT_THROW(mLua.safe_script("mutable:get('x').z = 3"), std::exception);
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EXPECT_NO_THROW(mLua.safe_script("mutable:getCopy('x').z = 3"));
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EXPECT_EQ(get<int>(mLua, "mutable:get('x').z"), 7);
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EXPECT_EQ(get<int>(mLua, "ro:get('x').z"), 7);
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EXPECT_EQ(get<std::string>(mLua, "ro:get('x').y"), "abc");
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}
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TEST(LuaUtilStorageTest, Saving)
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{
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sol::state mLua;
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LuaUtil::LuaStorage::initLuaBindings(mLua);
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LuaUtil::LuaStorage storage(mLua);
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mLua["permanent"] = storage.getMutableSection("permanent");
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mLua["temporary"] = storage.getMutableSection("temporary");
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mLua.safe_script("temporary:removeOnExit()");
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mLua.safe_script("permanent:set('x', 1)");
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mLua.safe_script("temporary:set('y', 2)");
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std::string tmpFile = (std::filesystem::temp_directory_path() / "test_storage.bin").string();
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storage.save(tmpFile);
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EXPECT_EQ(get<int>(mLua, "permanent:get('x')"), 1);
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EXPECT_EQ(get<int>(mLua, "temporary:get('y')"), 2);
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storage.clearTemporary();
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mLua["permanent"] = storage.getMutableSection("permanent");
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mLua["temporary"] = storage.getMutableSection("temporary");
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EXPECT_EQ(get<int>(mLua, "permanent:get('x')"), 1);
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EXPECT_TRUE(get<bool>(mLua, "temporary:get('y') == nil"));
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mLua.safe_script("permanent:set('x', 3)");
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mLua.safe_script("permanent:set('z', 4)");
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LuaUtil::LuaStorage storage2(mLua);
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mLua["permanent"] = storage2.getMutableSection("permanent");
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mLua["temporary"] = storage2.getMutableSection("temporary");
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storage2.load(tmpFile);
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EXPECT_EQ(get<int>(mLua, "permanent:get('x')"), 1);
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EXPECT_TRUE(get<bool>(mLua, "permanent:get('z') == nil"));
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EXPECT_TRUE(get<bool>(mLua, "temporary:get('y') == nil"));
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}
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}
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@ -0,0 +1,198 @@
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#include "storage.hpp"
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#include <filesystem>
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#include <fstream>
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#include <components/debug/debuglog.hpp>
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namespace sol
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{
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template <>
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struct is_automagical<LuaUtil::LuaStorage::SectionMutableView> : std::false_type {};
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template <>
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struct is_automagical<LuaUtil::LuaStorage::SectionReadOnlyView> : std::false_type {};
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}
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namespace LuaUtil
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{
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LuaStorage::Value LuaStorage::Section::sEmpty;
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sol::object LuaStorage::Value::getCopy(lua_State* L) const
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{
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return deserialize(L, mSerializedValue);
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}
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sol::object LuaStorage::Value::getReadOnly(lua_State* L) const
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{
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if (mReadOnlyValue == sol::nil && !mSerializedValue.empty())
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mReadOnlyValue = deserialize(L, mSerializedValue, nullptr, true);
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return mReadOnlyValue;
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}
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const LuaStorage::Value& LuaStorage::Section::get(std::string_view key) const
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{
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auto it = mValues.find(key);
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if (it != mValues.end())
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return it->second;
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else
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return sEmpty;
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}
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void LuaStorage::Section::set(std::string_view key, const sol::object& value)
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{
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mValues[std::string(key)] = Value(value);
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mChangeCounter++;
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if (mStorage->mListener)
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(*mStorage->mListener)(mSectionName, key, value);
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}
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bool LuaStorage::Section::wasChanged(int64_t& lastCheck)
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{
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bool res = lastCheck < mChangeCounter;
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lastCheck = mChangeCounter;
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return res;
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}
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sol::table LuaStorage::Section::asTable()
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{
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sol::table res(mStorage->mLua, sol::create);
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for (const auto& [k, v] : mValues)
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res[k] = v.getCopy(mStorage->mLua);
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return res;
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}
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void LuaStorage::initLuaBindings(lua_State* L)
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{
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sol::state_view lua(L);
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sol::usertype<SectionReadOnlyView> roView = lua.new_usertype<SectionReadOnlyView>("ReadOnlySection");
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sol::usertype<SectionMutableView> mutableView = lua.new_usertype<SectionMutableView>("MutableSection");
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roView["get"] = [](sol::this_state s, SectionReadOnlyView& section, std::string_view key)
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{
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return section.mSection->get(key).getReadOnly(s);
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};
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roView["getCopy"] = [](sol::this_state s, SectionReadOnlyView& section, std::string_view key)
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{
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return section.mSection->get(key).getCopy(s);
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};
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roView["wasChanged"] = [](SectionReadOnlyView& section) { return section.mSection->wasChanged(section.mLastCheck); };
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roView["asTable"] = [](SectionReadOnlyView& section) { return section.mSection->asTable(); };
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mutableView["get"] = [](sol::this_state s, SectionMutableView& section, std::string_view key)
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{
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return section.mSection->get(key).getReadOnly(s);
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};
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mutableView["getCopy"] = [](sol::this_state s, SectionMutableView& section, std::string_view key)
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{
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return section.mSection->get(key).getCopy(s);
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};
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mutableView["wasChanged"] = [](SectionMutableView& section) { return section.mSection->wasChanged(section.mLastCheck); };
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mutableView["asTable"] = [](SectionMutableView& section) { return section.mSection->asTable(); };
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mutableView["reset"] = [](SectionMutableView& section, sol::optional<sol::table> newValues)
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{
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section.mSection->mValues.clear();
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if (newValues)
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{
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for (const auto& [k, v] : *newValues)
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{
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try
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{
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section.mSection->set(k.as<std::string_view>(), v);
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}
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catch (std::exception& e)
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{
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Log(Debug::Error) << "LuaUtil::LuaStorage::Section::reset(table): " << e.what();
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}
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}
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}
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section.mSection->mChangeCounter++;
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section.mLastCheck = section.mSection->mChangeCounter;
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};
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mutableView["removeOnExit"] = [](SectionMutableView& section) { section.mSection->mPermanent = false; };
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mutableView["set"] = [](SectionMutableView& section, std::string_view key, const sol::object& value)
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{
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if (section.mLastCheck == section.mSection->mChangeCounter)
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section.mLastCheck++;
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section.mSection->set(key, value);
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};
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}
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void LuaStorage::clearTemporary()
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{
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auto it = mData.begin();
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while (it != mData.end())
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{
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if (!it->second->mPermanent)
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it = mData.erase(it);
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else
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++it;
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}
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}
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void LuaStorage::load(const std::string& path)
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{
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mData.clear();
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try
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{
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Log(Debug::Info) << "Loading Lua storage \"" << path << "\" (" << std::filesystem::file_size(path) << " bytes)";
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std::ifstream fin(path, std::fstream::binary);
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std::string serializedData((std::istreambuf_iterator<char>(fin)), std::istreambuf_iterator<char>());
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sol::table data = deserialize(mLua, serializedData);
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for (const auto& [sectionName, sectionTable] : data)
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{
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Section* section = getSection(sectionName.as<std::string_view>());
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for (const auto& [key, value] : sol::table(sectionTable))
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section->set(key.as<std::string_view>(), value);
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}
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}
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catch (std::exception& e)
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{
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Log(Debug::Error) << "Can not read \"" << path << "\": " << e.what();
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}
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}
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void LuaStorage::save(const std::string& path) const
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{
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sol::table data(mLua, sol::create);
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for (const auto& [sectionName, section] : mData)
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{
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if (section->mPermanent)
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data[sectionName] = section->asTable();
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}
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std::string serializedData = serialize(data);
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Log(Debug::Info) << "Saving Lua storage \"" << path << "\" (" << serializedData.size() << " bytes)";
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std::ofstream fout(path, std::fstream::binary);
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fout.write(serializedData.data(), serializedData.size());
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fout.close();
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}
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LuaStorage::Section* LuaStorage::getSection(std::string_view sectionName)
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{
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auto it = mData.find(sectionName);
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if (it != mData.end())
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return it->second.get();
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auto section = std::make_unique<Section>(this, std::string(sectionName));
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sectionName = section->mSectionName;
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auto [newIt, _] = mData.emplace(sectionName, std::move(section));
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return newIt->second.get();
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}
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sol::object LuaStorage::getReadOnlySection(std::string_view sectionName)
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{
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Section* section = getSection(sectionName);
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return sol::make_object<SectionReadOnlyView>(mLua, SectionReadOnlyView{section, section->mChangeCounter});
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}
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sol::object LuaStorage::getMutableSection(std::string_view sectionName)
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{
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Section* section = getSection(sectionName);
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return sol::make_object<SectionMutableView>(mLua, SectionMutableView{section, section->mChangeCounter});
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}
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sol::table LuaStorage::getAllSections()
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{
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sol::table res(mLua, sol::create);
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for (const auto& [sectionName, _] : mData)
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res[sectionName] = getMutableSection(sectionName);
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return res;
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}
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}
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@ -0,0 +1,81 @@
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#ifndef COMPONENTS_LUA_STORAGE_H
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#define COMPONENTS_LUA_STORAGE_H
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#include <map>
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#include <sol/sol.hpp>
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#include "serialization.hpp"
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namespace LuaUtil
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{
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class LuaStorage
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{
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public:
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static void initLuaBindings(lua_State*);
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explicit LuaStorage(lua_State* lua) : mLua(lua) {}
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void clearTemporary();
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void load(const std::string& path);
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void save(const std::string& path) const;
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sol::object getReadOnlySection(std::string_view sectionName);
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sol::object getMutableSection(std::string_view sectionName);
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sol::table getAllSections();
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void set(std::string_view section, std::string_view key, const sol::object& value) { getSection(section)->set(key, value); }
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using ListenerFn = std::function<void(std::string_view, std::string_view, const sol::object&)>;
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void setListener(ListenerFn fn) { mListener = std::move(fn); }
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private:
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class Value
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{
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public:
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Value() {}
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Value(const sol::object& value) : mSerializedValue(serialize(value)) {}
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sol::object getCopy(lua_State* L) const;
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sol::object getReadOnly(lua_State* L) const;
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private:
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std::string mSerializedValue;
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mutable sol::object mReadOnlyValue = sol::nil;
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};
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struct Section
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{
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explicit Section(LuaStorage* storage, std::string name) : mStorage(storage), mSectionName(std::move(name)) {}
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const Value& get(std::string_view key) const;
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void set(std::string_view key, const sol::object& value);
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bool wasChanged(int64_t& lastCheck);
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sol::table asTable();
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LuaStorage* mStorage;
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std::string mSectionName;
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std::map<std::string, Value, std::less<>> mValues;
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bool mPermanent = true;
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int64_t mChangeCounter = 0;
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static Value sEmpty;
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};
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struct SectionMutableView
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{
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Section* mSection = nullptr;
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int64_t mLastCheck = 0;
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};
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struct SectionReadOnlyView
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{
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Section* mSection = nullptr;
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int64_t mLastCheck = 0;
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};
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Section* getSection(std::string_view sectionName);
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lua_State* mLua;
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std::map<std::string_view, std::unique_ptr<Section>> mData;
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std::optional<ListenerFn> mListener;
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};
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}
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#endif // COMPONENTS_LUA_STORAGE_H
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@ -1,5 +0,0 @@
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Package openmw.settings
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=======================
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.. raw:: html
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:file: generated_html/openmw_settings.html
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@ -0,0 +1,5 @@
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Package openmw.storage
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======================
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.. raw:: html
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:file: generated_html/openmw_storage.html
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@ -1,14 +0,0 @@
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-------------------------------------------------------------------------------
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-- `openmw.settings` provides read-only access to GMST records in content files.
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-- @module settings
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-- @usage
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-- local settings = require('openmw.settings')
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-------------------------------------------------------------------------------
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-- Get a GMST setting from content files.
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-- @function [parent=#settings] getGMST
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-- @param #string setting
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return nil
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@ -0,0 +1,96 @@
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---
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-- `openmw.storage` contains functions to work with permanent Lua storage.
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-- @module storage
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-- @usage
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-- local storage = require('openmw.storage')
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-- local myModData = storage.globalSection('MyModExample')
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-- myModData:set("someVariable", 1.0)
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-- myModData:set("anotherVariable", { exampleStr='abc', exampleBool=true })
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-- local function update()
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-- if myModCfg:checkChanged() then
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-- print('Data was changes by another script:')
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-- print('MyModExample.someVariable =', myModData:get('someVariable'))
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-- print('MyModExample.anotherVariable.exampleStr =',
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-- myModData:get('anotherVariable').exampleStr)
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-- end
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-- end
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---
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-- Get a section of the global storage; can be used by any script, but only global scripts can change values.
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-- Creates the section if it doesn't exist.
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-- @function [parent=#storage] globalSection
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-- @param #string sectionName
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-- @return #StorageSection
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---
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-- Get a section of the player storage; can be used by player scripts only.
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-- Creates the section if it doesn't exist.
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-- @function [parent=#storage] playerSection
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-- @param #string sectionName
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-- @return #StorageSection
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---
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-- Get all global sections as a table; can be used by global scripts only.
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-- Note that adding/removing items to the returned table doesn't create or remove sections.
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-- @function [parent=#storage] allGlobalSections
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-- @return #table
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---
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-- Get all global sections as a table; can be used by player scripts only.
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-- Note that adding/removing items to the returned table doesn't create or remove sections.
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-- @function [parent=#storage] allPlayerSections
|
||||
-- @return #table
|
||||
|
||||
---
|
||||
-- A map `key -> value` that represents a storage section.
|
||||
-- @type StorageSection
|
||||
|
||||
---
|
||||
-- Get value by a string key; if value is a table makes it readonly.
|
||||
-- @function [parent=#StorageSection] get
|
||||
-- @param self
|
||||
-- @param #string key
|
||||
|
||||
---
|
||||
-- Get value by a string key; if value is a table returns a copy.
|
||||
-- @function [parent=#StorageSection] getCopy
|
||||
-- @param self
|
||||
-- @param #string key
|
||||
|
||||
---
|
||||
-- Return `True` if any value in this section was changed by another script since the last `wasChanged`.
|
||||
-- @function [parent=#StorageSection] wasChanged
|
||||
-- @param self
|
||||
-- @return #boolean
|
||||
|
||||
---
|
||||
-- Copy all values and return them as a table.
|
||||
-- @function [parent=#StorageSection] asTable
|
||||
-- @param self
|
||||
-- @return #table
|
||||
|
||||
---
|
||||
-- Remove all existing values and assign values from given (the arg is optional) table.
|
||||
-- Note: `section:reset()` removes all values, but not the section itself. Use `section:removeOnExit()` to remove the section completely.
|
||||
-- @function [parent=#StorageSection] reset
|
||||
-- @param self
|
||||
-- @param #table values (optional) New values
|
||||
|
||||
---
|
||||
-- Make the whole section temporary: will be removed on exit or when load a save.
|
||||
-- No section can be removed immediately because other scripts may use it at the moment.
|
||||
-- Temporary sections have the same interface to get/set values, the only difference is they will not
|
||||
-- be saved to the permanent storage on exit.
|
||||
-- This function can not be used for a global storage section from a local script.
|
||||
-- @function [parent=#StorageSection] removeOnExit
|
||||
-- @param self
|
||||
|
||||
---
|
||||
-- Set value by a string key; can not be used for global storage from a local script.
|
||||
-- @function [parent=#StorageSection] set
|
||||
-- @param self
|
||||
-- @param #string key
|
||||
-- @param #any value
|
||||
|
||||
return nil
|
||||
|
||||
Loading…
Reference in New Issue