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#pragma once
#include "http/request.hpp"
#include "network_connection.hpp"
#include <SoftwareSerial.h>
#include <avr/pgmspace.h>
#include <stddef.h>
#include <stdint.h>
constexpr auto MAX_NETWORK_MODULE_RESPONSE_LENGTH = 128U;
constexpr auto REQUEST_DATA_LENGTH_BUF_SIZE = 16U;
constexpr auto REQUEST_METHOD_STR_MAX_LENGTH = 10U;
constexpr auto REQUEST_PATH_MAX_LENGTH = 64U;
constexpr auto REQUEST_HTTP_VERSION_MAX_LENGTH = 10U;
constexpr auto WIFI_CONNECT_COMMAND_BASE_LENGTH = 7U;
constexpr auto CREATE_TCP_SERVER_COMMAND_BASE_LENGTH = 8U;
constexpr auto CLOSE_CONNECTION_COMMAND_BASE_LENGTH = 51U;
constexpr auto SEND_RESPONSE_COMMAND_BASE_LENGTH = 51U;
constexpr auto ASCII_TO_CHAR = 48U;
constexpr auto TIMEOUT_SHORT = 1500U;
constexpr auto TIMEOUT_MEDIUM = 4000U;
constexpr auto TIMEOUT_LONG = 10000U;
const char RESPONSE_HTTP_VERSION[] PROGMEM = { "HTTP/1.1" };
constexpr auto RESPONSE_STATUS_CODE_LENGTH = 3U;
constexpr auto NUMBER_BASE = 10U;
enum WifiMode
{
Station = 1,
SoftAP = 2,
SoftAPAndStation = 3
};
enum WiFiModuleResponseStatus
{
OK,
FAIL,
ERROR,
TIMEOUT
};
struct WiFiModuleOptions
{
uint8_t receive_pin;
uint8_t transmit_pin;
};
class WiFiModule
{
public:
explicit WiFiModule(const WiFiModuleOptions &options) noexcept;
void begin(size_t baudrate) noexcept;
auto get_available() noexcept -> int;
void reset() noexcept;
/**
* Connects to a wifi network.
*
* @param ssid The service set identifier of a wifi network.
* @param password The wifi network password.
*
* @returns Whether or not it succeeded.
*/
auto connect_to_wifi(const char *ssid, const char *password) noexcept -> bool;
void set_wifi_mode(WifiMode wifi_mode) noexcept;
void set_multiple_connections_enabled(bool is_enabled) noexcept;
void set_echo_enabled(bool is_enabled) noexcept;
void create_tcp_server(size_t port) noexcept;
/**
* Tests the connection to the wifi module.
*
* @returns Whether or not the test succeeded.
*/
auto test() noexcept -> bool;
/**
* Gets local IP address of the wifi module.
*
* @param local_ip_out Local IP output buffer.
*
* @returns A pointer to the local IP output buffer.
*/
auto get_local_ip(char *local_ip_out) noexcept -> const char *;
/**
* Reads a incoming HTTP request.
*
* @returns A request. Has a connection with a ID of -1 if reading the request failed.
*/
auto read_incoming_request() noexcept -> HTTPRequest;
auto close_connection(NetworkConnection &connection) noexcept -> bool;
auto send_response(
const NetworkConnection &connection,
size_t status_code,
const char **headers,
size_t headers_cnt,
const char *body
) noexcept -> bool;
private:
SoftwareSerial _serial;
/**
* Sends a command to the wifi module.
*
* @param command A command without the "AT+" in the beginning.
*
* @returns Whether or not it succeeded.
*/
auto _send_serial(const char *command) noexcept -> bool;
auto _read_connection_id() noexcept -> int8_t;
auto _read_request_data_length() noexcept -> size_t;
auto _read_request_method(size_t &request_data_length) noexcept -> HTTPRequestMethod;
/**
* Reads from the wifi module until it responds with a status.
*
* @param timeout Timeout in milliseconds.
* @param response_out Response output buffer.
*
* @returns The response status.
*
*/
auto _read(uint64_t timeout, char *response_out) noexcept -> WiFiModuleResponseStatus;
void
_read_to(char *buffer_out, size_t length, char stop_char, uint64_t timeout) noexcept;
void _read_bytes(char *buffer_out, size_t length, uint64_t timeout) noexcept;
auto _read_byte() noexcept -> char;
};
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