1 files changed, 189 insertions, 0 deletions

diff --git a/src/ui/chats.c b/src/ui/chats.c
new file mode 100644
index 0000000..991e43b
--- /dev/null
+++ b/src/ui/chats.c
@@ -0,0 +1,189 @@
+/*
+   This file is part of GNUnet.
+   Copyright (C) 2022 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/chats.c
+ */
+
+#include "chats.h"
+
+#include "../application.h"
+#include "../util.h"
+
+static int
+_chats_iterate(void *cls,
+               UNUSED struct GNUNET_CHAT_Handle *handle,
+               struct GNUNET_CHAT_Group *group)
+{
+  UI_CHATS_Handle *chats = cls;
+
+  const bool selected = (chats->line_selected == chats->line_index);
+
+  chats->line_index++;
+
+  if (selected)
+    chats->selected = GNUNET_CHAT_group_get_context(group);
+
+  return GNUNET_YES;
+}
+
+static int
+_chats_iterate_messages(void *cls,
+                        UNUSED struct GNUNET_CHAT_Context *context,
+                        const struct GNUNET_CHAT_Message *message)
+{
+  UI_MESSAGES_Handle *messages = cls;
+
+  messages_add(messages, message);
+
+  return GNUNET_YES;
+}
+
+void
+chats_event(UI_CHATS_Handle *chats,
+            MESSENGER_Application *app,
+            int key)
+{
+  chats->line_index = 0;
+  chats->selected = NULL;
+
+  int count = GNUNET_CHAT_iterate_groups(
+      app->chat.handle,
+      &_chats_iterate,
+      chats
+  );
+
+  switch (key)
+  {
+    case 27:
+    case KEY_EXIT:
+    {
+      GNUNET_CHAT_disconnect(app->chat.handle);
+      break;
+    }
+    case KEY_UP:
+    {
+      chats->line_selected--;
+      break;
+    }
+    case KEY_DOWN:
+    {
+      chats->line_selected++;
+      break;
+    }
+    case '\n':
+    case KEY_ENTER:
+    {
+      if (chats->selected)
+      {
+        messages_clear(&(app->messages));
+
+        GNUNET_CHAT_context_iterate_messages(
+            chats->selected,
+            &_chats_iterate_messages,
+            &(app->messages)
+        );
+
+        GNUNET_CHAT_context_set_user_pointer(
+            chats->selected,
+            &(app->messages)
+        );
+
+        app->chat.context = chats->selected;
+      }
+
+      break;
+    }
+    default:
+      break;
+  }
+
+  if (chats->line_selected < 0)
+    chats->line_selected = 0;
+  else if (chats->line_selected >= count)
+    chats->line_selected = count - 1;
+
+  if (!(chats->window))
+    return;
+
+  const int height = getmaxy(chats->window) - getbegy(chats->window);
+  const int y = chats->line_selected - chats->line_offset;
+
+  if (y < 0)
+    chats->line_offset += y;
+  else if (y + 1 >= height)
+    chats->line_offset += y + 1 - height;
+
+  if (chats->line_offset < 0)
+    chats->line_offset = 0;
+  else if (chats->line_offset >= count)
+    chats->line_offset = count - 1;
+}
+
+int
+_chats_iterate_print(void *cls,
+                     UNUSED struct GNUNET_CHAT_Handle *handle,
+                     struct GNUNET_CHAT_Group *group)
+{
+  UI_CHATS_Handle *chats = cls;
+
+  const bool selected = (chats->line_selected == chats->line_index);
+  const int y = chats->line_index - chats->line_offset;
+
+  chats->line_index++;
+
+  if (y < 0)
+    return GNUNET_YES;
+
+  const int height = getmaxy(chats->window) - getbegy(chats->window);
+
+  if (y >= height)
+    return GNUNET_NO;
+
+  const char *name = GNUNET_CHAT_group_get_name(group);
+
+  const int attrs_select = A_BOLD;
+
+  if (selected) wattron(chats->window, attrs_select);
+
+  wmove(chats->window, y, 0);
+  wprintw(chats->window, "%s", name);
+
+  if (selected) wattroff(chats->window, attrs_select);
+
+  return GNUNET_YES;
+}
+
+void
+chats_print(UI_CHATS_Handle *chats,
+            MESSENGER_Application *app)
+{
+  if (!(chats->window))
+    return;
+
+  chats->line_index = 0;
+  werase(chats->window);
+
+  GNUNET_CHAT_iterate_groups(
+      app->chat.handle,
+      &_chats_iterate_print,
+      chats
+  );
+}