294 lines
7.9 KiB
C
294 lines
7.9 KiB
C
/* SPDX-License-Identifier: MIT */
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/* Copyright (c) 2026 Oleksandr Zhylin */
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#include "query.h"
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#include <arpa/inet.h>
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#include <fcntl.h>
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#include <ncursesw/ncurses.h>
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#include <netinet/in.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/select.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <sys/un.h>
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#include <termios.h>
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#include <time.h>
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#include <unistd.h>
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#include <modals.h>
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#include <widget.h>
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#include <widget_core.h>
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#include "alert.h"
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#include "connection.h"
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#include "dialogue.h"
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#include "file_processor.h"
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#include "main.h"
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#include "server.h"
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#include "types.h"
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static int process_command(w_app_t *app, wait_server_cb *cb);
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void user_request_description(query_args_t *q_args);
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int process_query(w_app_t *app);
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int32_t process_user_input(w_app_t *app, w_cb_args_t *d_args);
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#define EXIT_APP(message, app, exit_code) \
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{ \
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w_alert(message); \
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close_session(app->params->sd); \
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w_app_destroy(app, exit_code); \
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}
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void query_loop(w_app_t *app) {
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query_args_t *query_args = app->query_args;
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fd_set readfds;
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int32_t sd = app->params->sd;
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size_t qlen;
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int sr;
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static file_args_t file_args;
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w_cb_args_t d_args = {
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.app = app, .element = NULL, .data = NULL, .resp_data.code = cbrc_none};
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init_file_args(&file_args);
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query_args->sd = sd;
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app->file_args = &file_args;
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for (;;) {
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/* update screen */
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w_app_draw_modal(app);
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w_app_refresh(app);
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FD_ZERO(&readfds);
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FD_SET(STDIN_FILENO, &readfds);
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FD_SET(sd, &readfds);
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int maxfd = app->params->is_connected ? sd : STDIN_FILENO;
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if (query_args->state == S_UPLOAD_FILE) {
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if (query_args->file != NULL) {
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FD_SET(query_args->file->fd, &readfds);
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if (query_args->file->fd > maxfd)
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maxfd = query_args->file->fd;
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}
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}
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if (query_args->state == S_NEXT_ACTION) {
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query_args->from_server = TRUE;
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if (ERR == process_query(app)) {
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EXIT_APP("*** error while processing query ***", app, 1)
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}
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query_args->state = S_WAIT_SERVER;
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continue;
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} else {
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sr = select(maxfd + 1, &readfds, NULL, NULL, NULL);
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if (sr == -1) {
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/* perror("select"); */
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EXIT_APP("*** error while processing 'select' call ***", app, 3)
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}
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}
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if (FD_ISSET(sd, &readfds)) {
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/* process request from the server */
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qlen = read(sd, query_args->buf, INBUFSIZE);
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if (qlen == 0) {
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EXIT_APP("*** server closed the connection ***", app, 1)
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} else {
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query_args->buf_used = qlen;
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query_args->from_server = TRUE;
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if (ERR == process_query(app)) {
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EXIT_APP("*** error while processing query ***", app, 1)
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}
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}
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}
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if (query_args->file && query_args->file->fd > -1 &&
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FD_ISSET(query_args->file->fd, &readfds)) {
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/* process upload/download */
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query_args->buf_used =
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read(query_args->file->fd, query_args->buf, INBUFSIZE);
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process_query(app);
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}
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if (FD_ISSET(STDIN_FILENO, &readfds)) {
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if (ERR == process_user_input(app, &d_args)) {
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EXIT_APP("*** error while processing user input ***", app, 4)
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}
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}
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}
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}
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void wait_register(query_args_t *q_args) {
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params_t *params = q_args->params;
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q_args->state = WAIT_REGISTER_CONFIRMATION;
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char email[EMAIL_LEN];
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ask_register(q_args->params, email);
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server_send_string(q_args, "register %s %s %s\n", params->uname, params->pass,
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email);
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}
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int upload_confirm_cb(w_app_t *app, char *query, int q_len) {
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if (!strncmp("finished\n", query, sizeof("finished\n") - 1)) {
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w_ui_file_list_t *fui = (w_ui_file_list_t *)app->query_args->main_ui->ui;
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w_notification("File upload", dc_normal, "File %s is uploaded to the server!",
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app->query_args->file->name);
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clear_file_in_query(app->query_args);
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app->query_args->state = S_FILE_LIST;
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app->modal.needs_destroy = true;
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w_fl_reset(fui);
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server_send_string(app->query_args, "file list %u %u\n", fui->max_lines, 1);
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return 0;
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}
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return 1; /* TODO: Error case */
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}
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int process_query(w_app_t *app) {
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query_args_t *query_args = app->query_args;
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file_args_t *file_args = app->file_args;
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query_args->buf[query_args->buf_used] = 0;
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int32_t res = 0;
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switch (query_args->state) {
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case WAIT_SERVER:
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case WAIT_SERVER_INIT:
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case WAIT_CLIENT:
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case WAIT_REGISTER_CONFIRMATION:
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case S_WAIT_PASS:
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case S_WAIT_SERVER:
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process_command(app, NULL);
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break;
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case S_NEXT_ACTION:
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process_command(app, NULL);
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break;
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case S_WAIT_REGISTER_CONFIRMATION:
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process_command(app, server_wait_reg_confirm_cb);
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break;
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case S_ERR:
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break;
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case S_FILE_LIST:
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file_list(file_args, query_args);
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break;
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case S_FILE_DOWNLOAD:
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file_download(file_args, query_args);
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break;
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case S_UPLOAD_REQUESTED:
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if (!file_upload_start(query_args)) {
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query_args->state = S_UPLOAD_FILE;
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} else {
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query_args->state = WAIT_CLIENT;
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}
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break;
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case S_UPLOAD_PARAMS:
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case S_UPLOAD_FILE:
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if ((res = file_upload(query_args)) == 1) {
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/* wait server for finish upload */
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query_args->state = S_UPLOAD_SERVER_FINISHES;
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} else if (res == -1) {
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/* TODO: Error */
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}
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break;
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case S_UPLOAD_SERVER_FINISHES:
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process_command(app, upload_confirm_cb);
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/* user_request_description(query_args); */
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break;
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case S_ASK_USER_BEFORE_LOGIN:
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break;
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case WAIT_REGISTER:
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wait_register(query_args);
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break;
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case S_PREP_SERVER_MESSAGE:
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process_command(app, server_print_message_cb);
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break;
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default:
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break;
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}
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return 0;
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}
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int query_extract_from_buf(char *buf, int *buf_used, char **output_line) {
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char *line;
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int pos = -1;
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if (*buf_used > 0) {
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char *cptr = strchr(buf, '\n');
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if (cptr != NULL)
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pos = cptr - buf;
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} else {
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return 0;
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}
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if (pos == -1) {
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int b_used = *buf_used;
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*buf_used = 0;
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line = malloc(b_used + 1);
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strncpy(line, buf, b_used);
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line[b_used] = 0;
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*output_line = line;
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return b_used;
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} else {
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line = malloc(pos + 2);
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strncpy(line, buf, pos + 1);
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line[++pos] = 0;
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*buf_used -= (pos);
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if (!pos)
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pos++;
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memmove(buf, buf + pos, *buf_used);
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buf[*buf_used] = 0;
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if (line[pos - 1] == '\r')
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line[--pos] = 0;
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*output_line = line;
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}
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return pos + 1;
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}
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void query_return_to_buf(char *buf, int *buf_used, char *input_line) {
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ssize_t l_len = strlen(input_line);
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memmove(buf + l_len, buf, l_len);
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memcpy(buf, input_line, l_len);
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*buf_used = l_len;
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buf[*buf_used] = 0;
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}
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static int process_command(w_app_t *app, wait_server_cb *callback) {
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query_args_t *q_args = app->query_args;
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int qlen;
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char *query = NULL;
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int res = 0;
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while ((qlen = query_extract_from_buf(q_args->buf, &(q_args->buf_used),
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&query))) {
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if (callback == NULL) {
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process_server_command(query, qlen, app);
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} else {
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res = callback(app, query, qlen);
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}
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free(query);
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query = NULL;
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if (res == 1) {
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break;
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}
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}
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return res;
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}
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void init_query_args(query_args_t *q_args, params_t *params) {
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q_args->buf = NULL;
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q_args->sd = -1;
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q_args->state = S_N_D;
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q_args->buf_used = 0;
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q_args->params = params;
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q_args->file = NULL;
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q_args->from_server = 0;
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q_args->server_message.text = NULL;
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q_args->server_message.capacity = 0;
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q_args->server_message.size = 0;
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q_args->progress_bar = NULL;
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q_args->active_dialogue = NULL;
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q_args->notification = NULL;
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}
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void user_request_description(query_args_t *q_args) {
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server_send_string(q_args, "%s\n\n:END:\n", q_args->file->description);
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} |