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#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h> /* for debug */
#include "client.h"
#include "data_decryption.h"
#include "printing_game_frames.h"
#include "verification_client_input.h"
static const char *ip = "109.107.161.30";
static const int port = 1025;
static void clean_up_resources(struct client *cl)
{
free(cl->cc.number_arr);
clear_stack(&cl->deck);
}
static void get_data_from_server(struct client *cl, fd_set *readfds)
{
int i;
int update_info = 0;
/* pointer to delimeter (:) that is behind extract data */
char *end_p;
if(FD_ISSET(cl->fd, readfds)) {
if(!cl->data_left_in_buffer) {
cl->data_left_in_buffer = read(cl->fd, cl->buffer, max_buffer_size);
/* end of file -- closed connection (from server) */
if(!cl->data_left_in_buffer) {
clean_up_resources(cl);
exit(0);
}
#ifdef DEBUG
printf("%d\n", cl->data_left_in_buffer);
for(i = 0; i < cl->data_left_in_buffer; ++i)
putchar(cl->buffer[i]);
putchar('\n');
#endif
}
decrypt_set_state(cl, &end_p);
update_info = 1;
cl->display_new_frame = 1;
cl->pending_server_response = 0;
}
if(update_info) {
switch(cl->state) {
case first_player:
break;
case confirmation_waiting:
cl->total_players = decrypt_get_number(end_p+1, &end_p);
break;
case display_only_table:
case tossing_expectation:
case tossing:
/* last arg will contain pointer to '\n' */
decrypt_set_base_info(cl, end_p+1, &end_p);
break;
case attack:
case defense:
case attack_expectation:
decrypt_set_base_info(cl, end_p+1, &end_p);
decrypt_set_position_whose_turn(cl, end_p+1, &end_p);
break;
case defense_expectation:
case spectator:
decrypt_set_base_info(cl, end_p+1, &end_p);
decrypt_set_position_whose_turn(cl, end_p+1, &end_p);
decrypt_set_card_queue(cl, end_p+1, &end_p);
if(cl->state == spectator)
decrypt_set_spectator_mode(cl, end_p+1);
break;
case card_acceptance_status:
decrypt_set_card_acceptance_status(cl, end_p+1);
break;
case result:
decrypt_set_durak_position(cl, end_p+1);
break;
/* no data to extract */
case tossing_limit_status:
case disconnect:
default:
{}
}
for(i = 0; cl->buffer[i] != '\n'; ++i)
{}
if((cl->buffer+i - cl->buffer + 1) != cl->data_left_in_buffer) {
cl->data_left_in_buffer -= i + 1;
memmove(cl->buffer, cl->buffer+i+1, cl->data_left_in_buffer);
} else
cl->data_left_in_buffer = 0;
}
}
static void prepare_tips_for_client(struct client *cl)
{
char *trump_suit = NULL;
if(!is_empty_stack(cl->deck))
add_hint_letters_stack(cl->deck);
switch(cl->state) {
case attack:
mark_card_for_attackers_stack(cl->deck);
break;
case defense:
trump_suit = cl->trump_card + strlen(cl->trump_card) - 1;
mark_card_for_defenders_stack(cl->deck, &cl->cot, trump_suit);
break;
case tossing:
mark_card_for_tossing_stack(cl->deck, &cl->cot);
break;
default:
{}
}
}
static void change_client_frame(struct client *cl)
{
if(cl->display_new_frame) {
pgf_new_frame();
switch(cl->state) {
case first_player:
pgf_first_player();
break;
case confirmation_waiting:
pgf_confirmation_waiting(cl->total_players);
break;
case display_only_table:
case attack_expectation:
case defense_expectation:
case tossing_expectation:
pgf_table(cl);
if(cl->state == attack_expectation ||
cl->state == defense_expectation ||
cl->state == tossing_expectation)
{
pgf_select_idle_mode_message(cl->state);
}
break;
case spectator:
pgf_table(cl);
pgf_spectator_mode(cl->sp_mode);
break;
case attack:
case defense:
case tossing:
pgf_table(cl);
pgf_suggestions(cl);
break;
case card_acceptance_status:
pgf_card_acceptance_status(cl->all_input_cards_accepted);
break;
case tossing_limit_status:
pgf_tossing_limit_status();
break;
case result:
pgf_game_result(cl->durak_position);
break;
case disconnect:
pgf_disconnect();
break;
case none:
{}
}
cl->display_new_frame = 0;
}
}
static int check_users_exit(enum client_states state, const char *buffer,
int size)
{
if((state == first_player || state == confirmation_waiting) &&
size == 2 && (buffer[0] == 'q' && buffer[1] == '\n'))
return 1;
return size == 3 && !strncmp(buffer, "qq", 2) && buffer[2] == '\n';
}
static void send_data_to_server(struct client *cl, fd_set *readfds)
{
int input_result = 0, data_size;
if(FD_ISSET(0, readfds)) { /* 0 - stdin */
data_size = read(0, cl->buffer, max_buffer_size);
if(check_users_exit(cl->state, cl->buffer, data_size)) {
close(cl->fd);
clean_up_resources(cl);
pgf_disconnect();
exit(0);
}
switch(cl->state) {
case confirmation_waiting:
input_result = vci_confirmation_waiting(cl->fd, cl->buffer);
break;
case attack:
case tossing:
input_result = vci_attack_or_tossing(cl->fd, cl->buffer, cl->deck,
cl->state);
break;
case defense:
input_result = vci_defense(cl->fd, cl->buffer, cl->deck);
break;
default:
{}
}
/* if 0, then re-tracking the input client */
if(input_result)
cl->pending_server_response = 1;
}
}
static int check_tracking_client_input(enum client_states state,
int pending_server_response)
{
if(pending_server_response)
return 0;
switch(state) {
case first_player:
case confirmation_waiting:
case attack:
case defense:
case tossing:
return 1;
default:
return 0;
}
return 0;
}
int main_loop(struct client *cl)
{
int select_result;
fd_set readfds;
for(;;) {
FD_ZERO(&readfds);
FD_SET(cl->fd, &readfds);
if(check_tracking_client_input(cl->state, cl->pending_server_response))
FD_SET(0, &readfds);
if(!cl->data_left_in_buffer) {
select_result = select(cl->fd + 1, &readfds, NULL, NULL, NULL);
if(select_result == -1)
return 2;
}
get_data_from_server(cl, &readfds);
prepare_tips_for_client(cl);
if(cl->display_new_frame)
change_client_frame(cl);
send_data_to_server(cl, &readfds);
}
}
static void init_client(struct client *cl)
{
cl->fd = -1;
cl->state = none;
cl->total_players = 0;
cl->total_cards_left = 0;
cl->player_position = 0;
cl->cc.number_arr = NULL;
cl->cc.number_arr_idx = -1;
cl->cot.card_arr_idx = -1;
cl->deck = NULL;
cl->pending_server_response = 0;
cl->cq.card_arr_idx = -1;
cl->position_whose_turn = 0;
cl->display_new_frame = 0;
cl->all_input_cards_accepted = 0;
cl->data_left_in_buffer = 0;
cl->sp_mode = spectator_table;
cl->durak_position = 0;
}
/*
* 0 - failure
* 1 - success
*/
static int connect_to_server(struct client *cl)
{
int connect_result;
struct sockaddr_in addr;
cl->fd = socket(AF_INET, SOCK_STREAM, 0);
if(cl->fd == -1)
return 0;
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = inet_addr(ip);
addr.sin_port = htons(port);
connect_result = connect(cl->fd, (struct sockaddr*) &addr, sizeof(addr));
if(connect_result == -1)
return 0;
return 1;
}
int main()
{
struct client cl;
pgf_new_frame();
pgf_welcome();
sleep(2);
init_client(&cl);
if(!connect_to_server(&cl)) {
pgf_new_frame();
pgf_connection(0);
return 1;
}
pgf_new_frame();
pgf_connection(1);
return main_loop(&cl);
}
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