server.h

/*++

Copyright (c) 2022 MobSlicer152

Module Name:

    server.h

Abstract:

    This module contains definitions for the server.

--*/

#pragma once

#include <assert.h>
#include <errno.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#ifdef _WIN32
// Not windows.h because mongoose redefines things
#define _AMD64_
#include <windef.h>
#include <WinBase.h>
#include <processthreadsapi.h>

#define strdup _strdup
#else
#include <unistd.h>
#include <pthread.h>
#endif

#include "cJSON.h"
#include "curl/curl.h"
#include "psa/crypto.h"
#include "mbedtls/sha256.h"
#include "mongoose.h"
#include "toml.h"

#undef snprintf

#include "types.h"

//
// Print a message
//

#define LOG(...) fprintf(stderr, "SERVER: " __VA_ARGS__);

//
// Format string arguments for errno errors
//

#define ERRNO_STRING() strerror(errno), errno

//
// Make a string
//

#define STRINGIZE(x) #x
#define STRINGIZE_EXPAND(x) STRINGIZE(x)

//
// Smaller of two values
//

#define MIN(a, b) ((a) < (b) ? (a) : (b))

//
// Larger of two values
//

#define MAX(a, b) ((a) > (b) ? (a) : (b))

//
// Clamp to range
//

#define CLAMP(Value, Min, Max) ((Value) < (Max) && (Value) > (Min) ? (Value) : (Value) > (Max) ? (Value) < (Min) ? (Min) : (Value) : (Max))

//
// Get the number of elements in an array
//

#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))

//
// Config file
//

#define CONFIG_FILE "config.toml"

//
// Root directory of files
//

#define ROOT_DIR "."

//
// Name of file to serve by default
//

#define STATIC_PAGE "index.html"

//
// Subdirectory where API is accessible
//

#define API_DIR "api"

//
// Make an endpoint string
//

#define MAKE_ENDPOINT(End) "/" API_DIR "/" End

//
// Test endpoint
//

#define TEST_ENDPOINT "test"

//
// Send a user's input to the Google Sheet
//

#define SEND_USER_ENDPOINT "send_user"

//
// Used for authentication
//

#define OAUTH_ENDPOINT "oauth_receive"

//
// Google Sheets spreadsheet ID to send user input to
//

extern PCHAR SpreadsheetId;

//
// Google OAuth2 Client JSON file
//

extern PCHAR GoogleOauth2ClientJson;

//
// Google OAuth2 authentication URI
//

extern PCHAR GoogleOauth2AuthUri;

//
// Google OAuth2 token URI
//

extern PCHAR GoogleOauth2TokenUri;

//
// Google OAuth2 client ID
//

extern PCHAR GoogleOauth2ClientId;

//
// Google OAuth2 client secret
//

extern PCHAR GoogleOauth2ClientSecret;

//
// Google OAuth2 token
//

extern PCHAR GoogleOauth2Token;

//
// TLS certificate path
//

extern PCHAR TlsCertPath;

//
// TLS private key file path
//

extern PCHAR TlsKeyPath;

//
// Port
//

extern UINT16 Port;

//
// Polling rate
//

extern INT PollRate;

//
// The email of the server owner, for Google authentication login_hint
//

extern PCHAR Email;

//
// Handle server events
//

VOID
HandleEvent(
    IN struct mg_connection* Connection,
    IN INT Event,
    IN PVOID EventData,
    IN PVOID Data
    );

//
// Signal handler
//

VOID
HandleSignal(
    IN INT Signal
    );

//
// Send user input to a spreadsheet
//

VOID
SendUser(
    IN PCCHAR Name,
    IN INT NameLen,
    IN PCCHAR Number,
    IN INT NumberLen
    );

//
// Authenticate with Google
//

BOOLEAN
AuthenticateGoogle(
    IN PVOID Parameter
    );

//
// Refresh Google token
//

BOOLEAN
RefreshGoogleToken(
    VOID
    );

//
// Main
//

INT
main(
    IN INT argc,
    IN PCHAR argv[]
    );