diff --git a/Makefile b/Makefile
index 9dc6ff5..ae8def9 100644
--- a/Makefile
+++ b/Makefile
@@ -10,12 +10,15 @@ OBJS := $(SRCS:$(SRC_DIR)/%.c=$(OBJ_DIR)/%.o)
 UI_SRCS := $(wildcard $(SRC_DIR)/ui/*.c $(SRC_DIR)/ui/**/*.c)
 OBJS += $(UI_SRCS:$(SRC_DIR)/ui/%.c=$(OBJ_DIR)/ui/%.o)
 
-$(OBJ_DIR)/%.o: $(SRC_DIR)/%.c $(SRC_DIR)/main.h
+$(OBJ_DIR)/%.o: $(SRC_DIR)/%.c $(SRC_DIR)/%.h
 	$(CC) $(CFLAGS) -c $< -o $@
 
 $(OBJ_DIR)/ui/%.o: $(SRC_DIR)/ui/%.c $(SRC_DIR)/ui/%.h
 	$(CC) $(CFLAGS) -c $< -o $@
 
+$(OBJ_DIR)/ui/widget/%.o: $(SRC_DIR)/ui/widget/%.c $(SRC_DIR)/ui/widget/%.h
+	$(CC) $(CFLAGS) -c $< -o $@
+
 bbs-client: $(OBJS)
 	$(CC) $(CFLAGS) $^ -o $(BIN_DIR)/$@
 
diff --git a/src/client.c b/src/client.c
index 059dadc..74db12b 100644
--- a/src/client.c
+++ b/src/client.c
@@ -1,4 +1,6 @@
+#include "file_processor.h"
 #include "main.h"
+#include "client.h"
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
diff --git a/src/client.h b/src/client.h
new file mode 100644
index 0000000..6b599d7
--- /dev/null
+++ b/src/client.h
@@ -0,0 +1,8 @@
+#ifndef CLIENT_H
+#define CLIENT_H
+#include "main.h"
+
+int process_client_command(char *line, int l_len, query_args_t *q_args);
+void print_prompt(params_t *params);
+
+#endif
\ No newline at end of file
diff --git a/src/connection.h b/src/connection.h
new file mode 100644
index 0000000..3f8df6e
--- /dev/null
+++ b/src/connection.h
@@ -0,0 +1,13 @@
+#ifndef CONNECTION_H
+#define CONNECTION_H
+#include "main.h"
+
+void connect_to_server(int sd, params_t *params);
+void init_params(params_t *restrict);
+void clear_params(params_t *params);
+void get_missing_params(params_t *restrict);
+void close_session(int sd);
+int init_client();
+void analyze_args(int argc, char *argv[], params_t *restrict);
+
+#endif
\ No newline at end of file
diff --git a/src/deps.mk b/src/deps.mk
index e69de29..27694cd 100644
--- a/src/deps.mk
+++ b/src/deps.mk
@@ -0,0 +1,18 @@
+client.o: src/client.c src/file_processor.h src/main.h src/types.h \
+ src/client.h
+connection.o: src/connection.c src/main.h src/types.h
+file_processor.o: src/file_processor.c src/client.h src/main.h \
+ src/types.h src/query.h
+main.o: src/main.c src/main.h src/types.h src/modal.h src/ui/app.h \
+ src/ui/widget/dialogue.h src/ui/widget/../widget.h \
+ src/ui/widget/../../main.h src/ui/widget/button.h \
+ src/ui/widget/../../main.h src/ui/widget/dialogue.h
+modal.o: src/modal.c src/ui/app.h src/ui/widget/dialogue.h \
+ src/ui/widget/../widget.h src/ui/widget/../../main.h \
+ src/ui/widget/../../types.h src/ui/widget/button.h \
+ src/ui/widget/../../main.h
+query.o: src/query.c src/file_processor.h src/main.h src/types.h \
+ src/connection.h src/client.h src/server.h
+server.o: src/server.c src/client.h src/main.h src/types.h \
+ src/connection.h src/query.h src/ui.h
+ui.o: src/ui.c
diff --git a/src/file_processor.c b/src/file_processor.c
index dd4e5f7..685dbea 100644
--- a/src/file_processor.c
+++ b/src/file_processor.c
@@ -1,4 +1,6 @@
+#include "client.h"
 #include "main.h"
+#include "query.h"
 #include <arpa/inet.h>
 #include <fcntl.h>
 #include <netinet/in.h>
@@ -58,17 +60,16 @@ void file_list(file_args_t *f_args, query_args_t *q_args) {
 void file_select(file_args_t *f_args, query_args_t *q_args) {
   char *buf = q_args->buf;
   fl_item_t *l_start = f_args->l_start;
-  fl_item_t *l_current = f_args->l_current;
+  // fl_item_t *l_current = f_args->l_current;
   fl_item_t *l_selected; /* from the list */
   fl_item_t *f_selected =
       &(f_args->f_selected); /* new copy of file struct (list be cleared) */
   uint32_t filenum;
-  uint32_t pagenum;
   uint32_t qlen;
   char send_buf[256];
   struct stat st = {0};
   
-  if (!(sscanf(buf, "%d", &filenum))) {
+  if (!(sscanf(buf, "%u", &filenum))) {
     write(q_args->sd, buf, strlen(buf));
     q_args->state = STATE_FILE_LIST;
     fl_clear(&f_args->l_start, &f_args->l_current);
@@ -240,7 +241,6 @@ void init_file_args(file_args_t *f_args) {
 /* work with file list */
 static void fl_add(fl_item_t **cur, fl_item_t **start, char *line) {
   char fname[128];
-  size_t fsize;
   char fowner[32];
   int h_len;
   fl_item_t *fitem = malloc(sizeof(fl_item_t));
diff --git a/src/file_processor.h b/src/file_processor.h
new file mode 100644
index 0000000..149b12b
--- /dev/null
+++ b/src/file_processor.h
@@ -0,0 +1,13 @@
+#ifndef FILE_PROCESSOR_H
+#define FILE_PROCESSOR_H
+#include "main.h"
+
+void file_list(file_args_t *f_args, query_args_t *q_args);
+void file_download(file_args_t *f_args, query_args_t *q_args);
+void file_select(file_args_t *fargs, query_args_t *q_args);
+void init_file_args(file_args_t *fargs);
+int file_upload_request(char *, query_args_t *q_args);
+int file_upload_start(query_args_t *q_args);
+int file_upload(query_args_t *q_args);
+
+#endif
\ No newline at end of file
diff --git a/src/main.c b/src/main.c
index 43a80c3..7cf8086 100644
--- a/src/main.c
+++ b/src/main.c
@@ -9,6 +9,7 @@
 #include <unistd.h>
 
 #include "ui/app.h"
+#include "ui/widget/dialogue.h"
 #include <ncurses.h>
 
 void event_loop(app_t *app);
@@ -24,6 +25,11 @@ int main(int argc, char **argv) {
   wrefresh(app->menu_win);
   wrefresh(app->action_win);
 
+  // temporal
+  app->modal.active = login;
+  dialogue_t *dialogue = init_dialogue("Login");
+  draw_dialogue(dialogue, app->cur_x, app->cur_y);
+
   event_loop(app);
 
   destroy_app(app);
@@ -38,6 +44,11 @@ void event_loop(app_t *app) {
   for (;;) {
     c = wgetch(app->win);
 
+    // if (app->modal.active != none_active) {
+    //   modal_event_loop(c, app);
+    //   continue;
+    // }
+
     switch (c) {
     // 113 is q key. This exits the program
     case 113:
diff --git a/src/main.h b/src/main.h
index 59e8f72..3f66ab6 100644
--- a/src/main.h
+++ b/src/main.h
@@ -1,3 +1,6 @@
+#ifndef MAIN_H
+#define MAIN_H
+
 #include <stddef.h>
 #include "types.h"
 
@@ -6,6 +9,7 @@
 #define LISTEN_QLEN 32
 #define INBUFSIZE 1024
 #define DOWNLOADS_DIR "./Downloads"
+#define DIALOGUE_TITLE 64
 
 typedef struct params {
   unsigned short port;
@@ -29,8 +33,9 @@ enum state {
   STATE_UPLOAD_FILE,
   STATE_UPLOAD_REQUESTED,
   STATE_ASK_USER_BEFORE_LOGIN,
-  ERR,
+  STATE_ERR,
 };
+
 typedef struct p_file {
   char *name;
   size_t size;
@@ -63,29 +68,4 @@ typedef struct query_args {
   params_t *params;
 } query_args_t;
 
-void init_params(params_t *restrict);
-void analyze_args(int argc, char *argv[], params_t *restrict);
-void get_missing_params(params_t *restrict);
-void connect_to_server(int sd, params_t *params);
-int init_client();
-void close_session(int sd);
-void wait_register(query_args_t *q_args);
-int process_query(query_args_t *query_args, file_args_t *file_args);
-void query_loop(int sd, params_t *);
-int query_extract_from_buf(char *buf, int *buf_used, char **output_line);
-int process_client_command(char *line, int l_len, query_args_t *q_args);
-int process_server_command(char *line, int l_len, query_args_t *q_args);
-void ask_register(params_t *params, char *email);
-
-void clear_params(params_t *params);
-
-/* file processor */
-void file_list(file_args_t *f_args, query_args_t *q_args);
-void file_download(file_args_t *f_args, query_args_t *q_args);
-void file_select(file_args_t *fargs, query_args_t *q_args);
-void init_file_args(file_args_t *fargs);
-int file_upload_request(char *, query_args_t *q_args);
-int file_upload_start(query_args_t *q_args);
-int file_upload(query_args_t *q_args);
-
-void print_prompt(params_t *params);
\ No newline at end of file
+#endif
\ No newline at end of file
diff --git a/src/modal.c b/src/modal.c
new file mode 100644
index 0000000..ef7d8c9
--- /dev/null
+++ b/src/modal.c
@@ -0,0 +1,20 @@
+#include "ui/app.h"
+#include <stdint.h>
+
+int32_t m_login(char evt_c, app_t *app);
+
+int32_t modal_event_loop(char evt_c, app_t *app) {
+  switch (app->modal.active) {
+
+  case none_active:
+    return 0;
+  case login:
+    m_login(evt_c, app);
+    break;
+  }
+  return 1;
+}
+
+int32_t m_login(char evt_c, app_t *app) {
+    
+}
\ No newline at end of file
diff --git a/src/modal.h b/src/modal.h
new file mode 100644
index 0000000..ff8cd07
--- /dev/null
+++ b/src/modal.h
@@ -0,0 +1,9 @@
+#ifndef MODAL_H
+#define MODAL_H
+
+#include "ui/app.h"
+#include <stdint.h>
+
+int32_t modal_event_loop(char evt_c, app_t *app);
+
+#endif
\ No newline at end of file
diff --git a/src/query.c b/src/query.c
index 2b38272..fc25c27 100644
--- a/src/query.c
+++ b/src/query.c
@@ -1,4 +1,8 @@
+#include "file_processor.h"
+#include "connection.h"
+#include "client.h"
 #include "main.h"
+#include "server.h"
 #include <arpa/inet.h>
 #include <fcntl.h>
 #include <netinet/in.h>
@@ -19,6 +23,7 @@ static void init_query_args(query_args_t *q_args, int sd, char *buf,
                             enum state state, int buf_used, params_t *params);
 static void wait_side(query_args_t *q_args);
 void user_request_description(query_args_t *q_args);
+int process_query(query_args_t *query_args, file_args_t *file_args);
 
 void query_loop(int sd, params_t *params) {
   fd_set readfds;
@@ -26,7 +31,6 @@ void query_loop(int sd, params_t *params) {
   size_t qlen;
   int sr;
   char buf[INBUFSIZE];
-  char *bufs = buf;
   static file_args_t file_args;
   static query_args_t query_args;
 
@@ -114,7 +118,7 @@ int process_query(query_args_t *query_args, file_args_t *file_args) {
     wait_side(query_args);
     break;
   case UPLOAD_FILE:
-  case ERR:
+  case STATE_ERR:
     break;
   case STATE_FILE_LIST:
     file_list(file_args, query_args);
diff --git a/src/query.h b/src/query.h
new file mode 100644
index 0000000..c0d2576
--- /dev/null
+++ b/src/query.h
@@ -0,0 +1,10 @@
+#ifndef QUERY_H
+#define QUERY_H
+
+#include "main.h"
+void query_loop(int sd, params_t *);
+void wait_register(query_args_t *q_args);
+int process_query(query_args_t *query_args, file_args_t *file_args);
+int query_extract_from_buf(char *buf, int *buf_used, char **output_line);
+
+#endif
\ No newline at end of file
diff --git a/src/server.c b/src/server.c
index aa30c80..9581c2f 100644
--- a/src/server.c
+++ b/src/server.c
@@ -1,4 +1,7 @@
+#include "client.h"
+#include "connection.h"
 #include "main.h"
+#include "query.h"
 #include "ui.h"
 #include <arpa/inet.h>
 #include <fcntl.h>
@@ -19,7 +22,6 @@ int process_server_command(char *line, int l_len, query_args_t *q_args) {
   int ws_pos = l_len;
   params_t *params = q_args->params;
   const char *login_options[] = {"Username", "Anonymous", "Register", NULL};
-  char r_buf[INBUFSIZE];
   uint32_t answer;
 
   char *cptr = strchr(line, ' ');
diff --git a/src/server.h b/src/server.h
new file mode 100644
index 0000000..6d6f1f1
--- /dev/null
+++ b/src/server.h
@@ -0,0 +1,8 @@
+#ifndef SERVER_H
+#define SERVER_H
+
+#include "main.h"
+int process_server_command(char *line, int l_len, query_args_t *q_args);
+void ask_register(params_t *params, char *email);
+
+#endif
\ No newline at end of file
diff --git a/src/ui.c b/src/ui.c
index 836650d..1581b3b 100644
--- a/src/ui.c
+++ b/src/ui.c
@@ -3,7 +3,6 @@
 #include <unistd.h>
 
 uint32_t print_ask_list(char title[], const char *options[]) {
-  char *option;
   char c;
   uint32_t i, answer;
 
diff --git a/src/ui/app.c b/src/ui/app.c
index 5dc7c0e..b8b6212 100644
--- a/src/ui/app.c
+++ b/src/ui/app.c
@@ -29,7 +29,7 @@ app_t *init_app() {
   _app->action_win = newwin(y_max - 4, action_w_x, 2, menu_w_x + 1);
 
   // dialogue
-  _app->modal.win = NULL;
+  _app->modal.dialogue.win = NULL;
 
   // print decorative bars
   print_bars(_app);
@@ -38,16 +38,16 @@ app_t *init_app() {
   draw_borders(_app);
 
   // init menus
-//   _app->menus = malloc(3 * sizeof(menu_t));
-//   _app->menus[0] = init_menu("(F)ile", 'f');
-//   _app->menus[1] = init_menu("(E)dit", 'e');
-//   _app->menus[2] = init_menu("(A)bout", 'a');
+  //   _app->menus = malloc(3 * sizeof(menu_t));
+  //   _app->menus[0] = init_menu("(F)ile", 'f');
+  //   _app->menus[1] = init_menu("(E)dit", 'e');
+  //   _app->menus[2] = init_menu("(A)bout", 'a');
 
   // set active window by default
-//   _app->active = N_MENU;
+  //   _app->active = N_MENU;
 
   // call the action window content by default
-//   ac_file(_app->action_win, _app->active);
+  //   ac_file(_app->action_win, _app->active);
 
   // refresh the windows
   wnoutrefresh(_app->win);
@@ -70,6 +70,7 @@ void init_nc() {
     start_color();
     init_pair(1, COLOR_RED, COLOR_BLACK);
     init_pair(2, COLOR_GREEN, COLOR_BLACK);
+    init_pair(MODAL_COLOR_PAIR, COLOR_BLUE, COLOR_WHITE);
   }
 }
 
@@ -94,8 +95,9 @@ void print_bars(app_t *app) {
   }
 
   // add content to the top bar
-  mvwprintw(app->win, 1, 2, "example curses app | ");
-  mvwprintw(app->win, 1, 20, "size %d, %d", app->cur_x, app->cur_y);
+  mvwprintw(app->win, 1, 2, "example cprint_barsurses app | ");
+  mvwprintw(app->win, 1, sizeof "example cprint_barsurses app | " + 1,
+            "size %d, %d", app->cur_x, app->cur_y);
 
   // add content to the bottom bar
   mvwprintw(app->win, app->cur_y - 2, 2, "F1 - Help | F9 - Quit");
diff --git a/src/ui/app.h b/src/ui/app.h
index 9f4b37e..71af5a5 100644
--- a/src/ui/app.h
+++ b/src/ui/app.h
@@ -2,9 +2,14 @@
 #define N_APP_H
 
 #include <ncurses.h>
+#include "widget/dialogue.h"
 
 typedef enum {
-  none = 0,
+  MODAL_COLOR_PAIR = 3,
+} color;
+
+typedef enum {
+  none_active = 0,
   login = 1,
 } dialogue_e;
 
@@ -14,7 +19,7 @@ typedef struct {
   WINDOW *action_win;
   struct {
     dialogue_e active;
-    WINDOW *win;
+    dialogue_t dialogue;
   } modal;
   
   //   menu_bar_t *menu_bar;
diff --git a/src/ui/widget.c b/src/ui/widget.c
new file mode 100644
index 0000000..e69de29
diff --git a/src/ui/widget.h b/src/ui/widget.h
new file mode 100644
index 0000000..726e473
--- /dev/null
+++ b/src/ui/widget.h
@@ -0,0 +1,16 @@
+#ifndef WIDGET_H
+#define WIDGET_H
+
+#include "../main.h"
+#include <stdint.h>
+
+typedef struct {
+  char title[DIALOGUE_TITLE];
+  uint32_t x;
+  uint32_t y;
+  uint32_t m_x;
+  uint32_t m_y;
+  char color_pair;
+} widget_t;
+
+#endif
\ No newline at end of file
diff --git a/src/ui/widget/button.h b/src/ui/widget/button.h
new file mode 100644
index 0000000..524c0e7
--- /dev/null
+++ b/src/ui/widget/button.h
@@ -0,0 +1,15 @@
+#ifndef BUTTON_H
+#define BUTTON_H
+
+#include "../../main.h"
+#include "../widget.h"
+#include <stdint.h>
+
+typedef struct {
+  widget_t widget;
+  char value;
+  uint32_t is_focused : 1;
+  uint32_t is_disabled : 1;
+} button_t;
+
+#endif
\ No newline at end of file
diff --git a/src/ui/widget/dialogue.c b/src/ui/widget/dialogue.c
new file mode 100644
index 0000000..414e6cd
--- /dev/null
+++ b/src/ui/widget/dialogue.c
@@ -0,0 +1,49 @@
+#include "dialogue.h"
+#include "../app.h"
+#include <ncurses.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+
+dialogue_t *init_dialogue(char title[]) {
+  dialogue_t *dialogue = malloc(sizeof(dialogue_t));
+  dialogue->win = 0;
+  dialogue->buttons = NULL;
+  strcpy(dialogue->w.title, title);
+  return dialogue;
+}
+
+int32_t draw_dialogue(dialogue_t *d, uint32_t cur_x, uint32_t cur_y) {
+  d->w.x = 50;
+  d->w.y = 20;
+  d->w.m_x = (cur_x - d->w.x) / 2;
+  d->w.m_y = (cur_y - d->w.y) / 2;
+
+  d->win = newwin(d->w.y, d->w.x, d->w.m_y, d->w.m_x);
+  
+  wcolor_set(d->win, MODAL_COLOR_PAIR, NULL);
+  wattrset(d->win, A_REVERSE);
+
+  for (int xp = 1; xp < d->w.x; xp++) {
+    for (int yp = 1; yp < d->w.y - 1; yp++) {
+      mvwprintw(d->win, yp, xp, " ");
+    }
+  }
+
+  uint32_t title_mx_pos = (d->w.x - strlen(d->w.title)) / 2;
+  
+  box(d->win, 0, 0);
+  mvwprintw(d->win, 0, title_mx_pos-1, " ");
+  mvwprintw(d->win, 0, title_mx_pos, d->w.title);
+  mvwprintw(d->win, 0, title_mx_pos + strlen(d->w.title), " ");
+  wattroff(d->win, A_REVERSE);
+  wrefresh(d->win);
+
+  return 0;
+};
+
+void destroy_active_dialogue(dialogue_t *d) {
+  delwin(d->win);
+  free(d->win);
+  d->win = NULL;
+}
\ No newline at end of file
diff --git a/src/ui/widget/dialogue.h b/src/ui/widget/dialogue.h
new file mode 100644
index 0000000..9e2cd4e
--- /dev/null
+++ b/src/ui/widget/dialogue.h
@@ -0,0 +1,18 @@
+#ifndef DIALOGUE_H
+#define DIALOGUE_H
+
+#include <ncurses.h>
+#include "../widget.h"
+#include "button.h"
+
+typedef struct {
+  WINDOW *win;
+  widget_t w;
+  button_t *buttons; // ! should be NULL-terminated
+} dialogue_t;
+
+dialogue_t *init_dialogue(char title[]);
+int32_t draw_dialogue(dialogue_t *d, uint32_t cur_x, uint32_t cur_y);
+void destroy_active_dialogue(dialogue_t *d);
+
+#endif
\ No newline at end of file