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#include "input.hpp"
#include "engine/keycodes.hpp"
#include <iostream>
#include <unistd.h>
#include <unordered_map>
const std::unordered_map<char, char> special_keys_map = {
{'A', keycodes::UP_ARROW},
{'B', keycodes::DOWN_ARROW},
{'C', keycodes::RIGHT_ARROW},
{'D', keycodes::LEFT_ARROW}};
void UserInputObserver::listen() noexcept
{
while (true)
{
char character = 0;
if (std::cin.read(&character, 1).fail())
{
continue;
}
_input_buffer_mutex.lock();
_input_buffer += character;
_input_buffer_mutex.unlock();
}
}
auto UserInputObserver::get_currently_pressed_key() noexcept -> Key
{
auto input_buffer = _get_input_buffer();
if (input_buffer.empty())
{
return 0;
}
auto character = input_buffer.front();
// Special treatment for arrow keys
if (input_buffer.length() == 3 && character == keycodes::ESCAPE)
{
const auto arrow_key_code = input_buffer.at(2);
if (arrow_key_code >= 'A' && arrow_key_code <= 'D')
{
character = special_keys_map.at(arrow_key_code);
}
input_buffer = input_buffer.substr(2);
}
input_buffer = input_buffer.substr(1);
_set_input_buffer(input_buffer);
return character;
}
auto UserInputObserver::_get_input_buffer() const noexcept -> std::string
{
_input_buffer_mutex.lock();
auto input_buffer = _input_buffer;
_input_buffer_mutex.unlock();
return input_buffer;
}
void UserInputObserver::_set_input_buffer(const std::string &input_buffer) noexcept
{
_input_buffer_mutex.lock();
_input_buffer = input_buffer;
_input_buffer_mutex.unlock();
}
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