7 files changed, 360 insertions, 197 deletions

diff --git a/Makefile b/Makefile
index 9ffcdae..f3af4a5 100644
--- a/Makefile
+++ b/Makefile
@@ -3,7 +3,10 @@ SOURCE_DIR  = src/
 INSTALL_DIR ?= /usr/local/
 
 BINARY  = messenger-gtk
-SOURCES = messenger_gtk.c
+SOURCES = messenger_gtk.c\
+                  chat/messenger.c\
+                  ui/messenger.c
+                  
 HEADERS = 
 
 LIBRARIES = gnunetutil gnunetchat
@@ -14,7 +17,7 @@ LD ?= gcc
 RM ?= rm
 
 CFLAGS  += -pedantic -Wall -Wextra -march=native -ggdb3
-LDFLAGS += -pthread
+LDFLAGS += 
 
 DEBUGFLAGS   = -O0 -D _DEBUG
 RELEASEFLAGS = -O2 -D NDEBUG -fwhole-program
diff --git a/resources/ui/messenger.ui b/resources/ui/messenger.ui
index d0487fa..d4282a4 100644
--- a/resources/ui/messenger.ui
+++ b/resources/ui/messenger.ui
@@ -78,7 +78,7 @@ Author: Tobias Frisch
                           </packing>
                         </child>
                         <child>
-                          <object class="GtkSearchEntry">
+                          <object class="GtkSearchEntry" id="chats_search">
                             <property name="width-request">250</property>
                             <property name="visible">True</property>
                             <property name="can-focus">True</property>
@@ -318,7 +318,7 @@ Author: Tobias Frisch
                               </packing>
                             </child>
                             <child>
-                              <object class="GtkButton">
+                              <object class="GtkButton" id="favourites_button">
                                 <property name="visible">True</property>
                                 <property name="can-focus">True</property>
                                 <property name="receives-default">True</property>
@@ -471,7 +471,7 @@ Author: Tobias Frisch
                                     <property name="can-focus">False</property>
                                     <property name="orientation">vertical</property>
                                     <child>
-                                      <object class="GtkButton">
+                                      <object class="GtkButton" id="new_group_button">
                                         <property name="visible">True</property>
                                         <property name="can-focus">True</property>
                                         <property name="receives-default">True</property>
@@ -522,7 +522,7 @@ Author: Tobias Frisch
                                       </packing>
                                     </child>
                                     <child>
-                                      <object class="GtkButton">
+                                      <object class="GtkButton" id="new_platform_button">
                                         <property name="visible">True</property>
                                         <property name="can-focus">True</property>
                                         <property name="receives-default">True</property>
@@ -573,7 +573,7 @@ Author: Tobias Frisch
                                       </packing>
                                     </child>
                                     <child>
-                                      <object class="GtkButton">
+                                      <object class="GtkButton" id="contacts_button">
                                         <property name="visible">True</property>
                                         <property name="can-focus">True</property>
                                         <property name="receives-default">True</property>
@@ -624,7 +624,7 @@ Author: Tobias Frisch
                                       </packing>
                                     </child>
                                     <child>
-                                      <object class="GtkButton">
+                                      <object class="GtkButton" id="calls_button">
                                         <property name="visible">True</property>
                                         <property name="can-focus">True</property>
                                         <property name="receives-default">True</property>
@@ -675,7 +675,7 @@ Author: Tobias Frisch
                                       </packing>
                                     </child>
                                     <child>
-                                      <object class="GtkButton">
+                                      <object class="GtkButton" id="settings_button">
                                         <property name="visible">True</property>
                                         <property name="can-focus">True</property>
                                         <property name="receives-default">True</property>
@@ -726,7 +726,7 @@ Author: Tobias Frisch
                                       </packing>
                                     </child>
                                     <child>
-                                      <object class="GtkButton">
+                                      <object class="GtkButton" id="night_mode_button">
                                         <property name="visible">True</property>
                                         <property name="can-focus">True</property>
                                         <property name="receives-default">True</property>
@@ -891,7 +891,7 @@ Author: Tobias Frisch
                             <property name="margin-end">4</property>
                             <property name="orientation">vertical</property>
                             <child>
-                              <object class="GtkLabel">
+                              <object class="GtkLabel" id="chat_title">
                                 <property name="visible">True</property>
                                 <property name="can-focus">False</property>
                                 <property name="label" translatable="yes">Chat title</property>
@@ -907,7 +907,7 @@ Author: Tobias Frisch
                               </packing>
                             </child>
                             <child>
-                              <object class="GtkLabel">
+                              <object class="GtkLabel" id="chat_subtitle">
                                 <property name="visible">True</property>
                                 <property name="can-focus">False</property>
                                 <property name="label" translatable="yes">Chat subtitle</property>
diff --git a/src/chat/messenger.c b/src/chat/messenger.c
new file mode 100644
index 0000000..56dc016
--- /dev/null
+++ b/src/chat/messenger.c
@@ -0,0 +1,27 @@
+/*
+   This file is part of GNUnet.
+   Copyright (C) 2021 GNUnet e.V.
+
+   GNUnet is free software: you can redistribute it and/or modify it
+   under the terms of the GNU Affero General Public License as published
+   by the Free Software Foundation, either version 3 of the License,
+   or (at your option) any later version.
+
+   GNUnet is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+   SPDX-License-Identifier: AGPL3.0-or-later
+ */
+/*
+ * @author Tobias Frisch
+ * @file chat/messenger.c
+ */
+
+#include "messenger.h"
+
+
diff --git a/src/chat/messenger.h b/src/chat/messenger.h
new file mode 100644
index 0000000..13a427c
--- /dev/null
+++ b/src/chat/messenger.h
@@ -0,0 +1,39 @@
+/*
+   This file is part of GNUnet.
+   Copyright (C) 2021 GNUnet e.V.
+
+   GNUnet is free software: you can redistribute it and/or modify it
+   under the terms of the GNU Affero General Public License as published
+   by the Free Software Foundation, either version 3 of the License,
+   or (at your option) any later version.
+
+   GNUnet is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+   SPDX-License-Identifier: AGPL3.0-or-later
+ */
+/*
+ * @author Tobias Frisch
+ * @file chat/messenger.h
+ */
+
+#ifndef CHAT_MESSENGER_H_
+#define CHAT_MESSENGER_H_
+
+#include <gnunet/platform.h>
+#include <gnunet/gnunet_chat_lib.h>
+#include <gnunet/gnunet_common.h>
+#include <gnunet/gnunet_program_lib.h>
+
+struct CHAT_MESSENGER_Handle
+{
+  struct GNUNET_CHAT_Handle *handle;
+  struct GNUNET_SCHEDULER_Task *idle;
+};
+
+#endif /* CHAT_MESSENGER_H_ */
diff --git a/src/messenger_gtk.c b/src/messenger_gtk.c
index 7106645..7ec3da0 100644
--- a/src/messenger_gtk.c
+++ b/src/messenger_gtk.c
@@ -22,65 +22,12 @@
  * @file messenger_gtk.c
  */
 
-#include <stdbool.h>
-#include <stdio.h>
+#include "chat/messenger.h"
+#include "ui/messenger.h"
 
 #include <pthread.h>
 
-#include <gtk-3.0/gtk/gtk.h>
-#include <libhandy-1/handy.h>
-
-#include <gnunet/gnunet_program_lib.h>
-#include <gnunet/gnunet_chat_lib.h>
-
-void handle_user_details_button_click(GtkButton* button,
-                                      gpointer user_data)
-{
-  HdyFlap* flap = HDY_FLAP(user_data);
-
-  if (TRUE == hdy_flap_get_reveal_flap(flap)) {
-    hdy_flap_set_reveal_flap(flap, FALSE);
-  } else {
-    hdy_flap_set_reveal_flap(flap, TRUE);
-  }
-}
-
-void handle_account_details_button_click(GtkButton* button,
-                                         gpointer user_data)
-{
-  GtkRevealer* revealer = GTK_REVEALER(user_data);
-
-  if (TRUE == gtk_revealer_get_reveal_child(revealer)) {
-    gtk_revealer_set_reveal_child(revealer, FALSE);
-  } else {
-    gtk_revealer_set_reveal_child(revealer, TRUE);
-  }
-}
-
-void handle_chats_listbox_row_activated(GtkListBox* listbox,
-                                        GtkListBoxRow* row,
-                                        gpointer user_data)
-{
-  HdyLeaflet* leaflet = HDY_LEAFLET(user_data);
-
-  GList* children = gtk_container_get_children(GTK_CONTAINER(leaflet));
-
-  if ((children) && (children->next)) {
-    hdy_leaflet_set_visible_child(leaflet, GTK_WIDGET(children->next->data));
-  }
-}
-
-void handle_back_button_click(GtkButton* button,
-                              gpointer user_data)
-{
-  HdyLeaflet* leaflet = HDY_LEAFLET(user_data);
-
-  GList* children = gtk_container_get_children(GTK_CONTAINER(leaflet));
-
-  if (children) {
-    hdy_leaflet_set_visible_child(leaflet, GTK_WIDGET(children->data));
-  }
-}
+#define UNUSED __attribute__((unused))
 
 struct main_program
 {
@@ -89,31 +36,27 @@ struct main_program
 
   bool exit;
 
-  struct GNUNET_CHAT_Handle *chat;
-
-  HdyAvatar *profile_avatar;
-  GtkLabel *profile_label;
-
-  struct GNUNET_SCHEDULER_Task *idle;
+  struct CHAT_MESSENGER_Handle chat;
+  struct UI_MESSENGER_Handle ui;
 };
 
 gboolean gtk_set_profile_name(gpointer user_data)
 {
   struct main_program *program = (struct main_program*) user_data;
 
-  const char *name = GNUNET_CHAT_get_name(program->chat);
+  const char *name = GNUNET_CHAT_get_name(program->chat.handle);
 
   if (name)
   {
-    hdy_avatar_set_text(program->profile_avatar, name);
-    gtk_label_set_text(program->profile_label, name);
+    hdy_avatar_set_text(program->ui.profile_avatar, name);
+    gtk_label_set_text(program->ui.profile_label, name);
   }
 
   return FALSE;
 }
 
 int gnunet_chat_message(void *cls,
-                        struct GNUNET_CHAT_Context *context,
+                        UNUSED struct GNUNET_CHAT_Context *context,
                         const struct GNUNET_CHAT_Message *message)
 {
   struct main_program *program = (struct main_program*) cls;
@@ -132,14 +75,14 @@ void gnunet_idle(void *cls)
 
   if (program->exit)
   {
-    GNUNET_CHAT_stop(program->chat);
-    program->chat = NULL;
+    GNUNET_CHAT_stop(program->chat.handle);
+    program->chat.handle = NULL;
 
     GNUNET_SCHEDULER_shutdown();
     return;
   }
 
-  program->idle = GNUNET_SCHEDULER_add_delayed_with_priority(
+  program->chat.idle = GNUNET_SCHEDULER_add_delayed_with_priority(
       GNUNET_TIME_relative_get_second_(),
       GNUNET_SCHEDULER_PRIORITY_IDLE,
       gnunet_idle,
@@ -148,13 +91,13 @@ void gnunet_idle(void *cls)
 }
 
 void gnunet_task(void *cls,
-                 char *const *args,
-                 const char *cfgfile,
+                 UNUSED char *const *args,
+                 UNUSED const char *cfgfile,
                  const struct GNUNET_CONFIGURATION_Handle *cfg)
 {
   struct main_program *program = (struct main_program*) cls;
 
-  program->chat = GNUNET_CHAT_start(
+  program->chat.handle = GNUNET_CHAT_start(
       cfg,
       "messenger-gtk",
       "test",
@@ -162,7 +105,7 @@ void gnunet_task(void *cls,
       program
   );
 
-  program->idle = GNUNET_SCHEDULER_add_delayed_with_priority(
+  program->chat.idle = GNUNET_SCHEDULER_add_delayed_with_priority(
       GNUNET_TIME_relative_get_zero_(),
       GNUNET_SCHEDULER_PRIORITY_IDLE,
       gnunet_idle,
@@ -201,27 +144,7 @@ int main(int argc, char **argv) {
   pthread_t gnunet_tid;
   gtk_init(&argc, &argv);
 
-  GtkBuilder* builder = gtk_builder_new();
-  gtk_builder_add_from_file(
-      builder,
-      "resources/ui/messenger.ui",
-      NULL
-  );
-
-  GtkApplicationWindow* window = GTK_APPLICATION_WINDOW(
-      gtk_builder_get_object(builder, "main_window")
-  );
-
-  program.profile_avatar = HDY_AVATAR(
-      gtk_builder_get_object(builder, "profile_avatar")
-  );
-
-  program.profile_label = GTK_LABEL(
-      gtk_builder_get_object(builder, "profile_label")
-  );
-
   GdkScreen* screen = gdk_screen_get_default();
-
   GtkCssProvider* provider = gtk_css_provider_new();
   gtk_css_provider_load_from_path(
       provider,
@@ -235,98 +158,7 @@ int main(int argc, char **argv) {
       GTK_STYLE_PROVIDER_PRIORITY_APPLICATION
   );
 
-  HdyHeaderBar* title_bar = HDY_HEADER_BAR(
-      gtk_builder_get_object(builder, "title_bar")
-  );
-
-  HdyLeaflet* leaflet_chat = HDY_LEAFLET(
-      gtk_builder_get_object(builder, "leaflet_chat")
-  );
-
-  hdy_leaflet_set_homogeneous(leaflet_chat, FALSE, GTK_ORIENTATION_HORIZONTAL, FALSE);
-
-  GtkListBox* chats_listbox = GTK_LIST_BOX(
-      gtk_builder_get_object(builder, "chats_listbox")
-  );
-
-  g_signal_connect(
-      chats_listbox,
-      "row-activated",
-      G_CALLBACK(handle_chats_listbox_row_activated),
-      leaflet_chat
-  );
-
-  GtkButton* user_details_button = GTK_BUTTON(
-      gtk_builder_get_object(builder, "user_details_button")
-  );
-
-  GtkButton* hide_user_details_button = GTK_BUTTON(
-      gtk_builder_get_object(builder, "hide_user_details_button")
-  );
-
-  HdyFlap* flap_user_details = HDY_FLAP(
-      gtk_builder_get_object(builder, "flap_user_details")
-  );
-
-  g_signal_connect(
-      user_details_button,
-      "clicked",
-      G_CALLBACK(handle_user_details_button_click),
-      flap_user_details
-  );
-
-  g_signal_connect(
-      hide_user_details_button,
-      "clicked",
-      G_CALLBACK(handle_user_details_button_click),
-      flap_user_details
-  );
-
-  GtkButton* account_details_button = GTK_BUTTON(
-      gtk_builder_get_object(builder, "account_details_button")
-  );
-
-  GtkRevealer* account_details_revealer = GTK_REVEALER(
-      gtk_builder_get_object(builder, "account_details_revealer")
-  );
-
-  g_signal_connect(
-      account_details_button,
-      "clicked",
-      G_CALLBACK(handle_account_details_button_click),
-      account_details_revealer
-  );
-
-  GtkButton* back_button = GTK_BUTTON(
-      gtk_builder_get_object(builder, "back_button")
-  );
-
-  g_signal_connect(
-      back_button,
-      "clicked",
-      G_CALLBACK(handle_back_button_click),
-      leaflet_chat
-  );
-
-  g_object_bind_property(
-      leaflet_chat,
-      "folded",
-      back_button,
-      "visible",
-      G_BINDING_SYNC_CREATE
-  );
-
-  g_object_bind_property(
-      leaflet_chat,
-      "folded",
-      title_bar,
-      "show-close-button",
-      G_BINDING_INVERT_BOOLEAN
-  );
-
-  gtk_widget_show(GTK_WIDGET(window));
-
-  g_signal_connect(window, "destroy", G_CALLBACK(gtk_main_quit), NULL);
+  ui_messenger_init(&(program.ui));
 
   pthread_create(&gnunet_tid, NULL, gnunet_thread, &program);
 
diff --git a/src/ui/messenger.c b/src/ui/messenger.c
new file mode 100644
index 0000000..829d31a
--- /dev/null
+++ b/src/ui/messenger.c
@@ -0,0 +1,190 @@
+/*
+   This file is part of GNUnet.
+   Copyright (C) 2021 GNUnet e.V.
+
+   GNUnet is free software: you can redistribute it and/or modify it
+   under the terms of the GNU Affero General Public License as published
+   by the Free Software Foundation, either version 3 of the License,
+   or (at your option) any later version.
+
+   GNUnet is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+   SPDX-License-Identifier: AGPL3.0-or-later
+ */
+/*
+ * @author Tobias Frisch
+ * @file ui/messenger.c
+ */
+
+#include "messenger.h"
+
+void handle_user_details_button_click(UI_UNUSED GtkButton* button,
+                                      gpointer user_data)
+{
+  HdyFlap* flap = HDY_FLAP(user_data);
+
+  if (TRUE == hdy_flap_get_reveal_flap(flap)) {
+    hdy_flap_set_reveal_flap(flap, FALSE);
+  } else {
+    hdy_flap_set_reveal_flap(flap, TRUE);
+  }
+}
+
+void handle_account_details_button_click(UI_UNUSED GtkButton* button,
+                                         gpointer user_data)
+{
+  GtkRevealer* revealer = GTK_REVEALER(user_data);
+
+  if (TRUE == gtk_revealer_get_reveal_child(revealer)) {
+    gtk_revealer_set_reveal_child(revealer, FALSE);
+  } else {
+    gtk_revealer_set_reveal_child(revealer, TRUE);
+  }
+}
+
+void handle_chats_listbox_row_activated(UI_UNUSED GtkListBox* listbox,
+                                        UI_UNUSED GtkListBoxRow* row,
+                                        gpointer user_data)
+{
+  HdyLeaflet* leaflet = HDY_LEAFLET(user_data);
+
+  GList* children = gtk_container_get_children(GTK_CONTAINER(leaflet));
+
+  if ((children) && (children->next)) {
+    hdy_leaflet_set_visible_child(leaflet, GTK_WIDGET(children->next->data));
+  }
+}
+
+void handle_back_button_click(UI_UNUSED GtkButton* button,
+                              gpointer user_data)
+{
+  HdyLeaflet* leaflet = HDY_LEAFLET(user_data);
+
+  GList* children = gtk_container_get_children(GTK_CONTAINER(leaflet));
+
+  if (children) {
+    hdy_leaflet_set_visible_child(leaflet, GTK_WIDGET(children->data));
+  }
+}
+
+void
+ui_messenger_init(struct UI_MESSENGER_Handle *handle)
+{
+  GtkBuilder* builder = gtk_builder_new();
+  gtk_builder_add_from_file(
+      builder,
+      "resources/ui/messenger.ui",
+      NULL
+  );
+
+  handle->main_window = GTK_APPLICATION_WINDOW(
+      gtk_builder_get_object(builder, "main_window")
+  );
+
+  handle->profile_avatar = HDY_AVATAR(
+      gtk_builder_get_object(builder, "profile_avatar")
+  );
+
+  handle->profile_label = GTK_LABEL(
+      gtk_builder_get_object(builder, "profile_label")
+  );
+
+  handle->title_bar = HDY_HEADER_BAR(
+      gtk_builder_get_object(builder, "title_bar")
+  );
+
+  handle->leaflet_chat = HDY_LEAFLET(
+      gtk_builder_get_object(builder, "leaflet_chat")
+  );
+
+  hdy_leaflet_set_homogeneous(handle->leaflet_chat, FALSE, GTK_ORIENTATION_HORIZONTAL, FALSE);
+
+  handle->chats_listbox = GTK_LIST_BOX(
+      gtk_builder_get_object(builder, "chats_listbox")
+  );
+
+  g_signal_connect(
+      handle->chats_listbox,
+      "row-activated",
+      G_CALLBACK(handle_chats_listbox_row_activated),
+      handle->leaflet_chat
+  );
+
+  handle->user_details_button = GTK_BUTTON(
+      gtk_builder_get_object(builder, "user_details_button")
+  );
+
+  handle->hide_user_details_button = GTK_BUTTON(
+      gtk_builder_get_object(builder, "hide_user_details_button")
+  );
+
+  handle->flap_user_details = HDY_FLAP(
+      gtk_builder_get_object(builder, "flap_user_details")
+  );
+
+  g_signal_connect(
+      handle->user_details_button,
+      "clicked",
+      G_CALLBACK(handle_user_details_button_click),
+      handle->flap_user_details
+  );
+
+  g_signal_connect(
+      handle->hide_user_details_button,
+      "clicked",
+      G_CALLBACK(handle_user_details_button_click),
+      handle->flap_user_details
+  );
+
+  handle->account_details_button = GTK_BUTTON(
+      gtk_builder_get_object(builder, "account_details_button")
+  );
+
+  handle->account_details_revealer = GTK_REVEALER(
+      gtk_builder_get_object(builder, "account_details_revealer")
+  );
+
+  g_signal_connect(
+      handle->account_details_button,
+      "clicked",
+      G_CALLBACK(handle_account_details_button_click),
+      handle->account_details_revealer
+  );
+
+  handle->back_button = GTK_BUTTON(
+      gtk_builder_get_object(builder, "back_button")
+  );
+
+  g_signal_connect(
+      handle->back_button,
+      "clicked",
+      G_CALLBACK(handle_back_button_click),
+      handle->leaflet_chat
+  );
+
+  g_object_bind_property(
+      handle->leaflet_chat,
+      "folded",
+      handle->back_button,
+      "visible",
+      G_BINDING_SYNC_CREATE
+  );
+
+  g_object_bind_property(
+      handle->leaflet_chat,
+      "folded",
+      handle->title_bar,
+      "show-close-button",
+      G_BINDING_INVERT_BOOLEAN
+  );
+
+  gtk_widget_show(GTK_WIDGET(handle->main_window));
+
+  g_signal_connect(handle->main_window, "destroy", G_CALLBACK(gtk_main_quit), NULL);
+}
diff --git a/src/ui/messenger.h b/src/ui/messenger.h
new file mode 100644
index 0000000..2bb8d8b
--- /dev/null
+++ b/src/ui/messenger.h
@@ -0,0 +1,72 @@
+/*
+   This file is part of GNUnet.
+   Copyright (C) 2021 GNUnet e.V.
+
+   GNUnet is free software: you can redistribute it and/or modify it
+   under the terms of the GNU Affero General Public License as published
+   by the Free Software Foundation, either version 3 of the License,
+   or (at your option) any later version.
+
+   GNUnet is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+   SPDX-License-Identifier: AGPL3.0-or-later
+ */
+/*
+ * @author Tobias Frisch
+ * @file ui/messenger.h
+ */
+
+#ifndef UI_MESSENGER_H_
+#define UI_MESSENGER_H_
+
+#include <gtk-3.0/gtk/gtk.h>
+#include <libhandy-1/handy.h>
+
+#define UI_UNUSED __attribute__((unused))
+
+struct UI_MESSENGER_Handle
+{
+  GtkApplicationWindow *main_window;
+
+  HdyLeaflet *leaflet_chat;
+  HdyFlap *flap_user_details;
+  HdyFlap *flap_chat_details;
+
+  HdyHeaderBar *title_bar;
+  GtkButton *back_button;
+
+  HdyAvatar *profile_avatar;
+  GtkLabel *profile_label;
+
+  GtkButton *hide_user_details_button;
+  GtkButton *favourites_button;
+  GtkButton *account_details_button;
+
+  GtkRevealer *account_details_revealer;
+  GtkListBox *accounts_listbox;
+
+  GtkButton *new_group_button;
+  GtkButton *new_platform_button;
+  GtkButton *contacts_button;
+  GtkButton *calls_button;
+  GtkButton *settings_button;
+  GtkButton *night_mode_button;
+
+  GtkButton *user_details_button;
+  GtkSearchEntry *chats_search;
+  GtkListBox *chats_listbox;
+
+  GtkLabel *chat_title;
+  GtkLabel *chat_subtitle;
+};
+
+void
+ui_messenger_init(struct UI_MESSENGER_Handle *handle);
+
+#endif /* UI_MESSENGER_H_ */