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/*
* Copyright 2023 jacqueline <me@jacqueline.id.au>
*
* SPDX-License-Identifier: GPL-3.0-only
*/
#include "lua_database.hpp"
#include <memory>
#include <string>
#include "lua.hpp"
#include "esp_log.h"
#include "lauxlib.h"
#include "lua.h"
#include "lvgl.h"
#include "database.hpp"
#include "event_queue.hpp"
#include "index.hpp"
#include "property.hpp"
#include "service_locator.hpp"
#include "ui_events.hpp"
namespace lua {
[[maybe_unused]] static constexpr char kTag[] = "lua_db";
static constexpr char kDbIndexMetatable[] = "db_index";
static constexpr char kDbRecordMetatable[] = "db_record";
static constexpr char kDbIteratorMetatable[] = "db_record";
static auto indexes(lua_State* state) -> int {
Bridge* instance = Bridge::Get(state);
lua_newtable(state);
auto db = instance->services().database().lock();
if (!db) {
return 1;
}
for (const auto& i : db->GetIndexes()) {
database::IndexInfo** data = reinterpret_cast<database::IndexInfo**>(
lua_newuserdata(state, sizeof(uintptr_t)));
luaL_setmetatable(state, kDbIndexMetatable);
*data = new database::IndexInfo{i};
lua_rawseti(state, -2, i.id);
}
return 1;
}
static const struct luaL_Reg kDatabaseFuncs[] = {{"indexes", indexes},
{NULL, NULL}};
static auto db_iterate(lua_State* state) -> int {
database::Iterator* it = *reinterpret_cast<database::Iterator**>(
lua_touserdata(state, lua_upvalueindex(1)));
auto res = it->Next();
if (res) {
database::IndexRecord** record = reinterpret_cast<database::IndexRecord**>(
lua_newuserdata(state, sizeof(uintptr_t)));
*record = new database::IndexRecord(*res);
luaL_setmetatable(state, kDbRecordMetatable);
return 1;
}
return 0;
}
static auto db_iterator_gc(lua_State* state) -> int {
database::Iterator** it = reinterpret_cast<database::Iterator**>(
luaL_checkudata(state, 1, kDbIteratorMetatable));
if (it != NULL) {
delete *it;
}
return 0;
}
static auto push_iterator(
lua_State* state,
std::variant<database::Continuation, database::IndexInfo> val) -> void {
Bridge* instance = Bridge::Get(state);
database::Iterator** data = reinterpret_cast<database::Iterator**>(
lua_newuserdata(state, sizeof(uintptr_t)));
std::visit(
[&](auto&& arg) {
*data = new database::Iterator(instance->services().database(), arg);
},
val);
luaL_setmetatable(state, kDbIteratorMetatable);
lua_pushcclosure(state, db_iterate, 1);
}
static auto record_text(lua_State* state) -> int {
database::IndexRecord* data = *reinterpret_cast<database::IndexRecord**>(
luaL_checkudata(state, 1, kDbRecordMetatable));
lua_pushstring(state,
data->text().value_or("[tell jacqueline u saw this]").c_str());
return 1;
}
static auto record_contents(lua_State* state) -> int {
database::IndexRecord* data = *reinterpret_cast<database::IndexRecord**>(
luaL_checkudata(state, 1, kDbRecordMetatable));
if (data->track()) {
lua_pushinteger(state, *data->track());
} else {
push_iterator(state, data->Expand(1).value());
}
return 1;
}
static auto record_gc(lua_State* state) -> int {
database::IndexRecord** data = reinterpret_cast<database::IndexRecord**>(
luaL_checkudata(state, 1, kDbRecordMetatable));
if (data != NULL) {
delete *data;
}
return 0;
}
static const struct luaL_Reg kDbRecordFuncs[] = {{"title", record_text},
{"contents", record_contents},
{"__tostring", record_text},
{"__gc", record_gc},
{NULL, NULL}};
static auto index_name(lua_State* state) -> int {
database::IndexInfo** data = reinterpret_cast<database::IndexInfo**>(
luaL_checkudata(state, 1, kDbIndexMetatable));
if (data == NULL) {
return 0;
}
lua_pushstring(state, (*data)->name.c_str());
return 1;
}
static auto index_iter(lua_State* state) -> int {
database::IndexInfo** data = reinterpret_cast<database::IndexInfo**>(
luaL_checkudata(state, 1, kDbIndexMetatable));
if (data == NULL) {
return 0;
}
push_iterator(state, **data);
return 1;
}
static auto index_gc(lua_State* state) -> int {
database::IndexInfo** data = reinterpret_cast<database::IndexInfo**>(
luaL_checkudata(state, 1, kDbIndexMetatable));
if (data != NULL) {
delete *data;
}
return 0;
}
static const struct luaL_Reg kDbIndexFuncs[] = {{"name", index_name},
{"iter", index_iter},
{"__tostring", index_name},
{"__gc", index_gc},
{NULL, NULL}};
static auto lua_database(lua_State* state) -> int {
// Metatable for indexes
luaL_newmetatable(state, kDbIndexMetatable);
lua_pushliteral(state, "__index");
lua_pushvalue(state, -2);
lua_settable(state, -3); // metatable.__index = metatable
// Add member funcs to the metatable.
luaL_setfuncs(state, kDbIndexFuncs, 0);
luaL_newmetatable(state, kDbIteratorMetatable);
lua_pushliteral(state, "__gc");
lua_pushcfunction(state, db_iterator_gc);
lua_settable(state, -3);
luaL_newmetatable(state, kDbRecordMetatable);
lua_pushliteral(state, "__index");
lua_pushvalue(state, -2);
lua_settable(state, -3); // metatable.__index = metatable
luaL_setfuncs(state, kDbRecordFuncs, 0);
luaL_newlib(state, kDatabaseFuncs);
return 1;
}
auto RegisterDatabaseModule(lua_State* s) -> void {
luaL_requiref(s, "database", lua_database, true);
lua_pop(s, 1);
}
} // namespace lua
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