BackupInProgressDialog.vala

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/*
 * BackupInProgressDialog.vala
 *
 * Copyright 2025-2026 Calogero Scarnà — BastionGuard Backup
 *
 * GPL-2.0-or-later
 *
 * Modal dialog shown at start-up when another instance of
 * BastionGuard Backup is already running (typically a scheduled
 * snapshot, an on-demand backup or a restore in progress).
 *
 * The dialog is intentionally simple and self-contained: it does
 * not require the main window to exist, runs a private GLib main
 * loop, and lets the application exit cleanly when the user
 * dismisses it.
 */
 
using Gtk;
 
using TeeJee.Logging;
using TeeJee.GtkHelper;
using TeeJee.Misc;
 
public class BackupInProgressDialog : Gtk.Window {
 
    private GLib.MainLoop? loop = null;
 
    public BackupInProgressDialog(string lock_message){
        title = _("BastionGuard Backup");
        set_default_size(480, -1);
        resizable = false;
        modal = true;
        add_css_class("smb-dialog");
        // No parent window: this dialog is shown before MainWindow exists.
 
        // Friendly title and explanation depending on what the running
        // instance is doing.
        string heading;
        string body;
 
        switch (lock_message){
            case "backup":
            case "ondemand":
                heading = _("A backup is currently in progress");
                body = _("BastionGuard Backup is currently creating a snapshot in the background.")
                    + "\n\n"
                    + _("Please wait for it to finish, then re-open BastionGuard Backup.");
                break;
 
            case "restore":
                heading = _("A restore is currently in progress");
                body = _("BastionGuard Backup is currently restoring a snapshot.")
                    + "\n\n"
                    + _("Please wait for it to finish, then re-open BastionGuard Backup.");
                break;
 
            case "delete":
            case "delete-all":
                heading = _("A snapshot deletion is currently in progress");
                body = _("BastionGuard Backup is currently deleting one or more snapshots.")
                    + "\n\n"
                    + _("Please wait for it to finish, then re-open BastionGuard Backup.");
                break;
 
            default:
                heading = _("BastionGuard Backup is already running");
                body = _("Another instance of BastionGuard Backup is currently active.")
                    + "\n\n"
                    + _("Please wait for it to finish, then re-open BastionGuard Backup.");
                break;
        }
 
        build_ui(heading, body);
    }
 
    private void build_ui(string heading, string body){
        var outer = new Gtk.Box(Gtk.Orientation.VERTICAL, 0);
        outer.margin_start  = 24;
        outer.margin_end    = 24;
        outer.margin_top    = 24;
        outer.margin_bottom = 18;
        set_child(outer);
 
        // Top row: warning icon + heading
        var top = new Gtk.Box(Gtk.Orientation.HORIZONTAL, 14);
        top.margin_bottom = 12;
        outer.append(top);
 
        var icon = new Gtk.Image.from_icon_name("dialog-information");
        icon.pixel_size = 48;
        icon.valign = Gtk.Align.START;
        top.append(icon);
 
        var heading_label = new Gtk.Label("");
        heading_label.set_markup("<span weight=\"bold\" size=\"large\">%s</span>"
            .printf(GLib.Markup.escape_text(heading)));
        heading_label.xalign = 0.0f;
        heading_label.wrap = true;
        heading_label.wrap_mode = Pango.WrapMode.WORD;
        heading_label.hexpand = true;
        heading_label.valign = Gtk.Align.CENTER;
        top.append(heading_label);
 
        // Body
        var body_label = new Gtk.Label(body);
        body_label.xalign = 0.0f;
        body_label.wrap = true;
        body_label.wrap_mode = Pango.WrapMode.WORD;
        body_label.margin_bottom = 18;
        outer.append(body_label);
 
        // Hint
        var hint = new Gtk.Label("");
        hint.set_markup("<i>%s</i>".printf(GLib.Markup.escape_text(
            _("This window will close when you press OK and BastionGuard Backup will exit."))));
        hint.xalign = 0.0f;
        hint.wrap = true;
        hint.add_css_class("dim-label");
        hint.margin_bottom = 12;
        outer.append(hint);
 
        // OK button
        var btn_box = new Gtk.Box(Gtk.Orientation.HORIZONTAL, 0);
        btn_box.halign = Gtk.Align.END;
        outer.append(btn_box);
 
        var btn_ok = new Gtk.Button.with_label(_("OK"));
        btn_ok.add_css_class("btn-primary");
        btn_ok.clicked.connect(() => { close_dialog(); });
        btn_box.append(btn_ok);
 
        // Closing the window via the X button must also exit the loop.
        close_request.connect(() => { close_dialog(); return false; });
    }
 
    private void close_dialog(){
        if (loop != null && loop.is_running()){
            loop.quit();
        }
        this.hide();
    }
 
    /**
     * Shows the dialog modally on its own GLib main loop and blocks
     * until the user dismisses it. Safe to call before the application
     * has any other windows open.
     */
    public void run_modal(){
        loop = new GLib.MainLoop(null, false);
        this.present();
        loop.run();
        this.destroy();
    }
}