Initial commit

.gitignore

@@ -0,0 +1 @@
+bbs

Makefile

@@ -0,0 +1,11 @@
+CC=gcc
+CFLAGS=-lncursesw
+EXECUTABLE=bbs
+
+all: make
+
+make:
+	$(CC) $(CFLAGS) bbs.c -o $(EXECUTABLE)
+
+run:
+	./$(EXECUTABLE)

bbs.c

@@ -0,0 +1,132 @@
+#include <curses.h>
+#include <string.h>
+
+int terminal_width;
+int terminal_height;
+
+char errorMessage[60];
+
+enum Status {
+    WAITING,
+    NEED_REFRESH
+};
+
+enum ActiveScreen {
+    HOME,
+    ERROR
+};
+
+struct Screen {
+    char name[20];
+    WINDOW *win;
+    void (*draw_screen)(struct Screen *);
+};
+
+void draw_home(struct Screen *screen)  {
+    char* banner = ""
+    "                 _                         _                             _   \n"
+    "                 | |                       | |                           | |  \n"
+    "   __ _ _ __ ___ | |__   ___ _ __ ___ _ __ | | __ _  ___ ___   _ __   ___| |_ \n"
+    "  / _` | '_ ` _ \\| '_ \\ / _ \\ '__/ __| '_ \\| |/ _` |/ __/ _ \\ | '_ \\ / _ \\ __|\n"
+    " | (_| | | | | | | |_) |  __/ |  \\__ \\ |_) | | (_| | (_|  __/_| | | |  __/ |_ \n"
+    "  \\__,_|_| |_| |_|_.__/ \\___|_|  |___/ .__/|_|\\__,_|\\___\\___(_)_| |_|\\___|\\__|\n"
+    "                                     | |                                      \n"
+    "                                     |_|                                      \n";
+
+    mvwprintw(screen->win, 1, 2, "Thank you for visiting:");
+    mvwprintw(screen->win, 2, 1, "%s", banner);
+}
+
+void draw_error(struct Screen *screen)  {
+    mvwprintw(screen->win, 1, 2, "%s", errorMessage);
+}
+
+void draw_screen (struct Screen *screen) {
+    screen->draw_screen(screen);
+    box(screen->win, 0, 0);
+
+    mvwprintw(screen->win, 0, 1, " %s ", screen->name);
+};
+
+int main() {
+
+    initscr();   /* start ncurses */
+    noecho();    /* hide keyboard input */
+    curs_set(0); /* disable cursor */
+    timeout(10); /* set timeout for getch() to 10ms */
+
+    int start_y = 0;
+    int start_x = 0;
+    int old_terminal_width = 0;
+    int old_terminal_height = 0;
+
+    struct Screen screens[5];
+
+    enum Status status = NEED_REFRESH; /* refresh screens[active_screen].window on first loop */
+    char input = ' ';
+
+    strcpy(errorMessage, "");
+
+    getmaxyx(stdscr, terminal_height, terminal_width);
+
+    int screen_before_error = HOME;
+
+    enum ActiveScreen active_screen = HOME;
+    struct Screen home = {
+        "home",
+        newwin(terminal_height, terminal_width, start_y, start_x),
+        draw_home
+    };
+    screens[HOME] = home;
+    struct Screen error = {
+        "error",
+        newwin(terminal_height, terminal_width, start_y, start_x),
+        draw_error
+    };
+    screens[ERROR] = error;
+
+    /* main event loop */
+    while (input != 'q') {
+        if ((input = getch())) { /* if any input was read */
+            status = NEED_REFRESH;
+        };
+        getmaxyx(stdscr, terminal_height, terminal_width);
+
+        /* resize active screen's window */
+        if (old_terminal_width != terminal_width || old_terminal_height != terminal_height) {
+            wclear(screens[active_screen].win);
+            wresize(screens[active_screen].win, terminal_height, terminal_width);
+            mvwin(screens[active_screen].win, 0, 0);
+            wrefresh(screens[active_screen].win);
+            old_terminal_width = terminal_width;
+            old_terminal_height = terminal_height;
+
+            if (terminal_width < 80 || terminal_height < 24) {
+                if (active_screen != ERROR) {
+                    strcpy(errorMessage, "This program expects at least 80 rows by 24 columns.");
+                    screen_before_error = active_screen;
+                };
+                active_screen = ERROR;
+            } else if (active_screen != screen_before_error) {
+                active_screen = screen_before_error;
+            };
+            status = NEED_REFRESH;
+        };
+
+        /* refresh active screen's window */
+        if (status == NEED_REFRESH) {
+            draw_screen(&screens[active_screen]);
+            wrefresh(screens[active_screen].win);
+            status = WAITING;
+        }
+
+    };
+
+    delwin(screens[active_screen].win);
+    nocbreak(); /* cbreak is the not needing to press enter on input, gets set in initscr, not undoing it causes
+                   printing errors after exit as this is a setting of the terminal itself */
+    endwin();   /* ends curses mode */
+    curs_set(1);
+    echo();
+    return 0;
+}