/* Copyright 2016 Software Freedom Conservancy Inc.
 *
 * This software is licensed under the GNU Lesser General Public License
 * (version 2.1 or later).  See the COPYING file in this distribution.
 */

public class Library.LastImportSidebarEntry : Library.HideablePageEntry {
    public LastImportSidebarEntry() {
        foreach (MediaSourceCollection media_sources in MediaCollectionRegistry.get_instance().get_all())
            media_sources.import_roll_altered.connect(on_import_rolls_altered);
        
        visible = (MediaCollectionRegistry.get_instance().get_last_import_id() != null);
    }
    
    ~LastImportSidebarEntry() {
        foreach (MediaSourceCollection media_sources in MediaCollectionRegistry.get_instance().get_all())
            media_sources.import_roll_altered.disconnect(on_import_rolls_altered);
    }
    
    public override string get_sidebar_name() {
        return LastImportPage.NAME;
    }
    
    public override string? get_sidebar_icon() {
        return Resources.ICON_LAST_IMPORT;
    }
    
    protected override Page create_page() {
        return new LastImportPage();
    }

    private void on_import_rolls_altered() {
        visible = (MediaCollectionRegistry.get_instance().get_last_import_id() != null);
    }
}