diff --git a/src/file_processor.c b/src/file_processor.c
index f8bda0a..5f006f4 100644
--- a/src/file_processor.c
+++ b/src/file_processor.c
@@ -1,6 +1,9 @@
 /* SPDX-License-Identifier: MIT */
 /* Copyright (c) 2026 Oleksandr Zhylin */
 
+#include "alert.h"
+#include "dialogue.h"
+#include "server.h"
 #include <arpa/inet.h>
 #include <fcntl.h>
 #include <netinet/in.h>
@@ -68,8 +71,6 @@ int32_t ui_file_select(file_args_t *f_args, query_args_t *q_args, int32_t idx) {
   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 qlen;
-  char send_buf[256];
   struct stat st = {0};
 
   l_selected = fl_select(f_args->l_start, idx);
@@ -91,15 +92,13 @@ int32_t ui_file_select(file_args_t *f_args, query_args_t *q_args, int32_t idx) {
   fl_clear(&f_args->l_start, &f_args->l_current);
   f_args->file_d = open(file_path, O_WRONLY | O_CREAT | O_TRUNC, 0666);
   if (f_args->file_d == -1) {
-    qlen = sprintf(send_buf, "error: %s\n", f_selected->name);
-    write(q_args->sd, send_buf, qlen);
+    server_send_string(q_args, "error: %s\n", f_selected->name);
     perror(f_selected->name);
     q_args->state = WAIT_CLIENT;
     free(file_path);
     return -2;
   }
-  qlen = sprintf(send_buf, "file download [%s]\n", f_selected->name);
-  write(q_args->sd, send_buf, qlen);
+  server_send_string(q_args, "file download [%s]\n", f_selected->name);
   q_args->state = S_FILE_DOWNLOAD;
   free(file_path);
   return OK;
@@ -150,9 +149,8 @@ void file_download(file_args_t *f_args, query_args_t *q_args) {
       q_args->notification = malloc(strlen(answer) + 1);
       strcpy(q_args->notification, answer);
       free(f_selected->name);
-      sprintf(answer, "file list %u %u\n%n", fui->max_lines, fui->current_page,
-              &a_len);
-      write(q_args->sd, answer, a_len);
+      server_send_string(q_args, "file list %u %u\n%n", fui->max_lines,
+                         fui->current_page, &a_len);
       q_args->state = S_FILE_LIST;
     }
   }
@@ -183,7 +181,7 @@ int32_t file_upload_start(query_args_t *q_args) {
   query_extract_from_buf(q_args->buf, &(q_args->buf_used), &query);
   if (strcmp(query, "accept")) {
     clear_file_in_query(q_args);
-    write(STDERR_FILENO, query, strlen(query));
+    notification("Server response", dc_alert, query);
     return -1;
   }
   return 0;
diff --git a/src/modals/alert.c b/src/modals/alert.c
index f312cd7..4acb637 100644
--- a/src/modals/alert.c
+++ b/src/modals/alert.c
@@ -17,7 +17,7 @@ void init_alert(app_t *_app) { app = _app; }
 
 void alert(const char *message) { notification("Alert", dc_alert, message); }
 
-void notification(const char *title, enum d_color_scheme color,
+void notification(const char *title, enum dc_color_scheme color,
                   const char *f_message, ...) {
   if (app == NULL)
     return;
diff --git a/src/modals/alert.h b/src/modals/alert.h
index 156f6fa..533297d 100644
--- a/src/modals/alert.h
+++ b/src/modals/alert.h
@@ -4,6 +4,6 @@
 #include <stdarg.h>
 void init_alert(app_t *app);
 void alert(const char *message);
-void notification(const char *title, enum d_color_scheme color,
+void notification(const char *title, enum dc_color_scheme color,
                    const char *f_message, ...);
 #endif
\ No newline at end of file
diff --git a/src/modals/login_credentials.c b/src/modals/login_credentials.c
index dd92a01..750889e 100644
--- a/src/modals/login_credentials.c
+++ b/src/modals/login_credentials.c
@@ -6,6 +6,7 @@
 #include <unistd.h>
 
 #include <widget.h>
+#include "../server.h"
 
 typedef struct {
   button_t *element;
@@ -31,7 +32,7 @@ void init_login_credentials_modal_cb(callback_args_t *args) {
       app->params->uname[in_name->value_len] = 0;
       strncpy(app->params->pass, in_pass->value, in_pass->value_len);
       app->params->pass[in_pass->value_len] = 0;
-      write(app->params->sd, app->params->uname, in_name->value_len);
+      server_send_string(app->query_args, app->params->uname);
       app->query_args->state = S_WAIT_SERVER;
       d->needs_destroy = true;
       print_bars(app);
diff --git a/src/modals/login_option.c b/src/modals/login_option.c
index cbf7503..804f974 100644
--- a/src/modals/login_option.c
+++ b/src/modals/login_option.c
@@ -6,6 +6,7 @@
 
 #include <unistd.h>
 #include <widget.h>
+#include "../server.h"
 
 typedef struct {
   button_t *element;
@@ -26,7 +27,7 @@ void login_modal_option_cb(callback_args_t *args) {
       d->needs_destroy = true;
       app->params->uname = malloc(sizeof "anonymous");
       strcpy(app->params->uname, "anonymous");
-      write(app->params->sd, app->params->uname, sizeof "anonymous" - 1);
+      server_send_string(app->query_args, app->params->uname);
       app->query_args->state = S_WAIT_SERVER;
       print_bars(app);
       break;
diff --git a/src/modals/register.c b/src/modals/register.c
index 4573749..e64b048 100644
--- a/src/modals/register.c
+++ b/src/modals/register.c
@@ -1,6 +1,5 @@
 #include <ncursesw/ncurses.h>
 #include <stdint.h>
-#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
@@ -9,6 +8,7 @@
 
 #include "alert.h"
 #include "group.h"
+#include "../server.h"
 
 typedef struct {
   button_t *element;
@@ -16,8 +16,6 @@ typedef struct {
 } group_bt_t;
 
 void init_register_modal_cb(callback_args_t *args) {
-  char query[256];
-  int32_t qlen = 0;
   callback_args_t d_args;
   app_t *app = args->app;
   dialogue_t *d = (dialogue_t *)app->active_widget;
@@ -65,10 +63,9 @@ void init_register_modal_cb(callback_args_t *args) {
     app->params->uname[in_name->value_len] = 0;
     strncpy(app->params->pass, in_pass->value, in_pass->value_len);
     app->params->pass[in_pass->value_len] = 0;
-    sprintf(query, "register %s %s %*s\n%n", app->params->uname,
-            app->params->pass, (int)in_email->value_len, in_email->value,
-            &qlen);
-    write(app->params->sd, query, qlen);
+    server_send_string(app->query_args, "register %s %s %*s\n", app->params->uname,
+            app->params->pass, (int)in_email->value_len, in_email->value
+            );
     app->query_args->state = S_WAIT_REGISTER_CONFIRMATION;
   }
 }
diff --git a/src/modals/upload_props_dialogue.c b/src/modals/upload_props_dialogue.c
index abbd836..cf416d4 100644
--- a/src/modals/upload_props_dialogue.c
+++ b/src/modals/upload_props_dialogue.c
@@ -3,12 +3,13 @@
 #include "widget_core.h"
 #include <ncursesw/ncurses.h>
 #include <stdint.h>
-#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
-#include <widget.h>
 #include <utils.h>
+#include <widget.h>
+
+#include "../server.h"
 
 void upload_props_dialogue_modal_cb(callback_args_t *args) {
   callback_args_t d_args;
@@ -18,30 +19,33 @@ void upload_props_dialogue_modal_cb(callback_args_t *args) {
   d_args.app = NULL;
   d_args.element = app->active_widget;
   dialogue_default_callback(&d_args);
-  char query[256];
   int32_t query_len = 0;
   if (d_args.resp_data.code == cbrp_val) {
-    checkbox_t *reg_cbx  = (checkbox_t *)d->g_content->elements[0].element;
+    checkbox_t *reg_cbx = (checkbox_t *)d->g_content->elements[0].element;
     checkbox_t *anon_cbx = (checkbox_t *)d->g_content->elements[1].element;
     checkbox_t *comp_cbx = (checkbox_t *)d->g_content->elements[2].element;
-    
+
     int32_t privileges = 0;
-    if (anon_cbx->value == true) privileges |= 1;
-    if (reg_cbx->value == true)  privileges |= 2;
-    if (comp_cbx->value == true) privileges |= 4;
+    if (anon_cbx->value == true)
+      privileges |= 1;
+    if (reg_cbx->value == true)
+      privileges |= 2;
+    if (comp_cbx->value == true)
+      privileges |= 4;
 
     switch (d_args.resp_data.val.val.num) {
     case 1:
-      query_len =
-          sprintf(query, "file upload \"%s\" %zu %d\n",
-                  app->query_args->file->name, app->query_args->file->size, privileges);
+      server_send_string(app->query_args, "file upload \"%s\" %zu %d\n",
+                         app->query_args->file->name,
+                         app->query_args->file->size, privileges);
       /* app->query_args->file->description =
           malloc(desc_input->value_len + 9); reserve space for \n:END:\n */
-      app->query_args->file->description = malloc(sizeof ("[Empty description]\n:END:\n"));
-      strcpy(app->query_args->file->description, "[Empty description]\n:END:\n");
+      app->query_args->file->description =
+          malloc(sizeof("[Empty description]\n:END:\n"));
+      strcpy(app->query_args->file->description,
+             "[Empty description]\n:END:\n");
       d->needs_destroy = true;
       app->query_args->state = S_UPLOAD_REQUESTED;
-      write(app->query_args->sd, query, query_len);
       break;
     case 2:
       FREE_MLC(app->query_args->file->name);
diff --git a/src/query.c b/src/query.c
index 39437a1..186210c 100644
--- a/src/query.c
+++ b/src/query.c
@@ -126,12 +126,11 @@ void query_loop(app_t *app) {
 
 void wait_register(query_args_t *q_args) {
   params_t *params = q_args->params;
-  char r_buf[INBUFSIZE];
   q_args->state = WAIT_REGISTER_CONFIRMATION;
   char email[EMAIL_LEN];
   ask_register(q_args->params, email);
-  sprintf(r_buf, "register %s %s %s\n", params->uname, params->pass, email);
-  write(q_args->sd, r_buf, strlen(r_buf) - 1);
+  server_send_string(q_args, "register %s %s %s\n", params->uname, params->pass,
+                     email);
 }
 
 int upload_confirm_cb(app_t *app, char *query) {
@@ -278,7 +277,5 @@ void init_query_args(query_args_t *q_args, params_t *params) {
 }
 
 void user_request_description(query_args_t *q_args) {
-  strcat(q_args->file->description, "\n\n:END:\n");
-  write(q_args->sd, q_args->file->description,
-        strlen(q_args->file->description) - 1);
+  server_send_string(q_args, "%s\n\n:END:\n", q_args->file->description);
 }
\ No newline at end of file
diff --git a/src/server.c b/src/server.c
index d20425c..ff753e6 100644
--- a/src/server.c
+++ b/src/server.c
@@ -48,7 +48,6 @@ int process_server_command(char *line, int l_len, app_t *app) {
   uint64_t new_capacity;
   ui_file_list_t *fui = (ui_file_list_t *)q_args->file_list_ui;
   char query[INBUFSIZE];
-  int32_t q_len = 0;
 
   char *cptr = strchr(line, ' ');
   if (cptr != NULL && cptr > line)
@@ -60,7 +59,7 @@ int process_server_command(char *line, int l_len, app_t *app) {
       PRINT_SRV_MESSAGE(q_args, l_len, line);
     }
     if (q_args->params->uname != NULL && q_args->params->pass != NULL) {
-      write(params->sd, q_args->params->uname, strlen(q_args->params->uname));
+      server_send_string(q_args, q_args->params->uname);
     } else {
       q_args->state = S_ASK_LOGIN_TYPE;
     }
@@ -72,7 +71,7 @@ int process_server_command(char *line, int l_len, app_t *app) {
     if (q_args->params->pass == NULL) {
       return 1;
     }
-    write(q_args->sd, params->pass, strlen(params->pass));
+    server_send_string(q_args, params->pass);
     return 0;
   }
 
@@ -90,9 +89,8 @@ int process_server_command(char *line, int l_len, app_t *app) {
   /* REGISTER CONFIRMATION */
   if (q_args->state == S_WAIT_REGISTER_CONFIRMATION) {
     if (!strcmp(line, "ok\n")) {
-      sprintf(query, "file list %u %u\n%n", fui->max_lines, fui->current_page,
-              &q_len);
-      write(q_args->sd, query, q_len);
+      server_send_string(q_args, "file list %u %u\n", fui->max_lines,
+                         fui->current_page);
       q_args->state = S_FILE_LIST;
       destroy_dialogue(&(app->modal), app);
       sprintf(query,
@@ -116,9 +114,8 @@ int process_server_command(char *line, int l_len, app_t *app) {
 
   /* WELCOME MES */
   if (!strncmp(line, "Welcome, ", ws_pos)) {
-    sprintf(query, "file list %u %u\n%n", fui->max_lines, fui->current_page,
-            &q_len);
-    write(q_args->sd, query, q_len);
+    server_send_string(q_args, "file list %u %u\n", fui->max_lines,
+                       fui->current_page);
     q_args->state = S_FILE_LIST;
     return 0;
   }
diff --git a/src/widget/dialogue.h b/src/widget/dialogue.h
index 52aebcc..4457994 100644
--- a/src/widget/dialogue.h
+++ b/src/widget/dialogue.h
@@ -12,7 +12,7 @@
 #include <widget_core.h>
 #define MAX_IDS 64
 
-enum d_color_scheme { dc_normal, dc_alert };
+enum dc_color_scheme { dc_normal, dc_alert };
 
 typedef struct {
   widget_t w;
@@ -25,7 +25,7 @@ typedef struct {
   bool needs_update;
   bool needs_destroy;
   coordinates_t *p_coordinates;
-  enum d_color_scheme color_scheme;
+  enum dc_color_scheme color_scheme;
   d_array_ptr_t id_map;
 } dialogue_t;
 
diff --git a/src/widget/file_list.c b/src/widget/file_list.c
index f78e243..59b547b 100644
--- a/src/widget/file_list.c
+++ b/src/widget/file_list.c
@@ -4,6 +4,7 @@
 #include "file_list.h"
 #include "../file_processor.h"
 #include "../fs.h"
+#include "../server.h"
 #include "app.h"
 #include <bstrlib.h>
 #include <ncursesw/ncurses.h>
@@ -21,9 +22,7 @@ void file_list_cb(callback_args_t *args) {
   app_t *app = args->app;
   ui_file_list_t *fui = app->query_args->file_list_ui;
   int32_t key = *((int32_t *)args->data);
-  char query[256];
   char q_prefix[128];
-  int32_t q_len = 0;
   if (fui->search_key->slen > 0) {
     sprintf(q_prefix, "file search name %s", fui->search_key->data);
   } else {
@@ -44,12 +43,8 @@ void file_list_cb(callback_args_t *args) {
         fui->search_key->slen = 0;
         sprintf(q_prefix, "file list");
       }
-      if (fui->search_key->slen > 0) {
-        sprintf(query, "%s %u %u\n%n", q_prefix, fui->max_lines, 1, &q_len);
-      } else {
-        sprintf(query, "%s %u %u\n%n", q_prefix, fui->max_lines, 1, &q_len);
-      }
-      write(app->query_args->sd, query, q_len);
+      server_send_string(app->query_args, "%s %u %u\n", q_prefix,
+                         fui->max_lines, 1);
       reset_file_list(fui);
     } else {
       bconchar(fui->search_key, key);
@@ -65,9 +60,8 @@ void file_list_cb(callback_args_t *args) {
       draw_file_list(fui);
     } else if (fui->current_page < fui->pages) {
       app->query_args->state = S_FILE_LIST;
-      sprintf(query, "%s %u %u\n%n", q_prefix, fui->max_lines,
-              fui->current_page + 1, &q_len);
-      write(app->query_args->sd, query, q_len);
+      server_send_string(app->query_args, "%s %u %u\n", q_prefix,
+                         fui->max_lines, fui->current_page + 1);
       reset_file_list(fui);
     }
     break;
@@ -77,9 +71,8 @@ void file_list_cb(callback_args_t *args) {
       draw_file_list(fui);
     } else if (fui->current_page > 1) {
       app->query_args->state = S_FILE_LIST;
-      sprintf(query, "%s %u %u\n%n", q_prefix, fui->max_lines,
-              fui->current_page - 1, &q_len);
-      write(app->query_args->sd, query, q_len);
+      server_send_string(app->query_args, "%s %u %u\n", q_prefix,
+                         fui->max_lines, fui->current_page - 1);
       reset_file_list(fui);
       fui->activate_last = true;
     }
@@ -90,8 +83,7 @@ void file_list_cb(callback_args_t *args) {
     fui->search_key->slen = 0;
     sprintf(q_prefix, "file list");
     app->query_args->state = S_FILE_LIST;
-    sprintf(query, "%s %u %u\n%n", q_prefix, fui->max_lines, 1, &q_len);
-    write(app->query_args->sd, query, q_len);
+    server_send_string(app->query_args, "%s %u %u\n", q_prefix, fui->max_lines, 1);
     reset_file_list(fui);
   case '\n':
     ui_file_select(app->file_args, app->query_args, fui->current_idx + 1);
@@ -181,13 +173,15 @@ void draw_file_list(ui_file_list_t *fui) {
   p_x = 1;
   int32_t p_len;
 
-  if (!fui->active_search && fui->search_key->slen > 0 && *(fui->start) == NULL) {
+  if (!fui->active_search && fui->search_key->slen > 0 &&
+      *(fui->start) == NULL) {
     bstring text = bfromStatic("[No data to show]");
     for (; p_y < (sz_y_f / 2); p_y++) {
       mvwprintw(parent_win, p_y, p_x, "%*s", sz_x - 1, "");
     }
     p_len = (sz_x - text->slen) / 2;
-    mvwprintw(parent_win, p_y++, p_x, "%*s%s%*s", p_len, "", text->data,  p_len, "");
+    mvwprintw(parent_win, p_y++, p_x, "%*s%s%*s", p_len, "", text->data, p_len,
+              "");
     for (; p_y < sz_y_f; p_y++) {
       mvwprintw(parent_win, p_y, p_x, "%*s", sz_x - 1, "");
     }