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/*
* Copyright 2023 jacqueline <me@jacqueline.id.au>
*
* SPDX-License-Identifier: GPL-3.0-only
*/
#include "bridge.hpp"
#include <memory>
#include <string>
#include "esp_log.h"
#include "lauxlib.h"
#include "lua.hpp"
#include "lvgl.h"
#include "event_queue.hpp"
#include "property.hpp"
#include "service_locator.hpp"
#include "ui_events.hpp"
namespace lua {
[[maybe_unused]] static constexpr char kTag[] = "lua_bridge";
static constexpr char kBridgeKey[] = "bridge";
static auto open_settings_fn(lua_State* state) -> int {
events::Ui().Dispatch(ui::internal::ShowSettingsPage{
.page = ui::internal::ShowSettingsPage::Page::kRoot});
return 0;
}
static auto open_now_playing_fn(lua_State* state) -> int {
events::Ui().Dispatch(ui::internal::ShowNowPlaying{});
return 0;
}
static auto open_browse_fn(lua_State* state) -> int {
int index = luaL_checkinteger(state, 1);
events::Ui().Dispatch(ui::internal::IndexSelected{
.id = static_cast<uint8_t>(index),
});
return 0;
}
static const struct luaL_Reg kLegacyUiFuncs[] = {
{"open_settings", open_settings_fn},
{"open_now_playing", open_now_playing_fn},
{"open_browse", open_browse_fn},
{NULL, NULL}};
static auto lua_legacy_ui(lua_State* state) -> int {
luaL_newlib(state, kLegacyUiFuncs);
return 1;
}
static auto get_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()) {
lua_pushstring(state, i.name.c_str());
lua_rawseti(state, -2, i.id);
}
return 1;
}
static const struct luaL_Reg kDatabaseFuncs[] = {{"get_indexes", get_indexes},
{NULL, NULL}};
static auto lua_database(lua_State* state) -> int {
luaL_newlib(state, kDatabaseFuncs);
return 1;
}
auto Bridge::Get(lua_State* state) -> Bridge* {
lua_pushstring(state, kBridgeKey);
lua_gettable(state, LUA_REGISTRYINDEX);
return reinterpret_cast<Bridge*>(lua_touserdata(state, -1));
}
Bridge::Bridge(system_fsm::ServiceLocator& services, lua_State& s)
: services_(services), state_(s), bindings_(s) {
lua_pushstring(&s, kBridgeKey);
lua_pushlightuserdata(&s, this);
lua_settable(&s, LUA_REGISTRYINDEX);
luaL_requiref(&s, "legacy_ui", lua_legacy_ui, true);
lua_pop(&s, 1);
luaL_requiref(&s, "database", lua_database, true);
lua_pop(&s, 1);
}
static auto new_property_module(lua_State* state) -> int {
const char* name = luaL_checkstring(state, 1);
luaL_newmetatable(state, name);
lua_pushstring(state, "__index");
lua_pushvalue(state, -2);
lua_settable(state, -3); // metatable.__index = metatable
return 1;
}
template <class... Ts>
inline constexpr bool always_false_v = false;
auto Bridge::AddPropertyModule(
const std::string& name,
std::vector<std::pair<std::string,
std::variant<LuaFunction, std::shared_ptr<Property>>>>
props) -> void {
// Create the module (or retrieve it if one with this name already exists)
luaL_requiref(&state_, name.c_str(), new_property_module, true);
for (const auto& prop : props) {
lua_pushstring(&state_, prop.first.c_str());
std::visit(
[&](auto&& arg) {
using T = std::decay_t<decltype(arg)>;
if constexpr (std::is_same_v<T, LuaFunction>) {
bindings_.Register(&state_, arg);
} else if constexpr (std::is_same_v<T, std::shared_ptr<Property>>) {
bindings_.Register(&state_, arg.get());
} else {
static_assert(always_false_v<T>, "missing case");
}
},
prop.second);
lua_settable(&state_, -3); // metatable.propname = property
}
lua_pop(&state_, 1); // pop the module off the stack
}
} // namespace lua
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