Kordophone/src/application/main-window.vala

using Adw;
using Gtk;

public class MainWindow : Adw.ApplicationWindow
{
    private ConversationListView conversation_list_view;
    private TranscriptContainerView transcript_container_view;

    public MainWindow () {
        Object (title: "Kordophone");

        var split_view = new NavigationSplitView ();
        split_view.set_min_sidebar_width (400);
        set_content (split_view);

        conversation_list_view = new ConversationListView ();
        conversation_list_view.conversation_selected.connect (conversation_selected);

        var conversation_list_page = new NavigationPage (conversation_list_view, "Conversations");
        split_view.sidebar = conversation_list_page;

        transcript_container_view = new TranscriptContainerView ();
        transcript_container_view.on_send.connect (on_transcript_send);

        var transcript_page = new NavigationPage (transcript_container_view, "Transcript");
        split_view.content = transcript_page;

        var show_settings_action = new SimpleAction ("settings", null);
        show_settings_action.activate.connect(show_settings);
        add_action(show_settings_action);
    }

    private void show_settings () {
        var dialog = new PreferencesWindow (this);
        dialog.present (this);
    }

    private void conversation_selected(Conversation conversation) {
        TranscriptView transcript_view = transcript_container_view.transcript_view;
        if (conversation == null) {
            transcript_view.model = null;
        } else {
            if (transcript_view.model == null || transcript_view.model.conversation_guid != conversation.guid) {
                transcript_view.model = new MessageListModel (conversation.guid);
                transcript_view.title = conversation.display_name;
                
                try {
                    Repository.get_instance().mark_conversation_as_read(conversation.guid);
                    Repository.get_instance().sync_conversation(conversation.guid);
                } catch (Error e) {
                    GLib.warning("Failed to sync conversation: %s", e.message);
                }
            }
        }
    }

    private void on_transcript_send(TranscriptContainerView view) {
        var body = view.message_body;
        var attachment_guids = view.attachment_guids;

        // Strip empty space at the beginning and end of the body
        body = body.strip();

        if (transcript_container_view.transcript_view.model == null) {
            GLib.warning("No conversation selected");
            return;
        }

        var selected_conversation = transcript_container_view.transcript_view.model.conversation_guid;
        if (selected_conversation == null) {
            GLib.warning("No conversation selected");
            return;
        }

        try {   
            Repository.get_instance().send_message(selected_conversation, body, attachment_guids.to_array());
        } catch (Error e) {
            GLib.warning("Failed to send message: %s", e.message);
        }
    }
}