OSDNotify.vala

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/*
 * OSDNotify.vala
 *
 * Copyright 2012-2018 Tony George <teejeetech@gmail.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301, USA.
 *
 *
 */
 
using TeeJee.Logging;
using TeeJee.FileSystem;
using TeeJee.ProcessHelper;
 
// dep: notify-send
public class OSDNotify : GLib.Object {
    
    private static DateTime dt_last_notification = null;
    public const int NOTIFICATION_INTERVAL = 3;
    
    public static int notify_send (
        string title, string message, int durationMillis,
        string urgency = "low", // low, normal, critical
        string dialog_type = "info" //error, info, warning
        ){ 
 
        /* Displays notification bubble on the desktop */
 
        int retVal = 0;
 
        switch (dialog_type){
            case "error":
            case "info":
            case "warning":
                //ok
                break;
            default:
                dialog_type = "info";
                break;
        }
 
        long seconds = 9999;
        
        if (dt_last_notification != null){
            DateTime dt_end = new DateTime.now_local();
            TimeSpan elapsed = dt_end.difference(dt_last_notification);
            seconds = (long)(elapsed * 1.0 / TimeSpan.SECOND);
        }
 
        if (seconds > NOTIFICATION_INTERVAL){
 
            if (is_supported()){
 
                string desktop_entry = "bastionguard-backup-gtk";
                string hint = "string:desktop-entry:%s".printf(desktop_entry);
 
                string s = "notify-send -t %d -u %s -i %s \"%s\" \"%s\" -h %s".printf(
                    durationMillis, urgency, "gtk-dialog-" + dialog_type, title, message, hint);
                
                retVal = TeeJee.ProcessHelper.exec_user_async(s);
                
                dt_last_notification = new DateTime.now_local();
            }
        }
 
        return retVal;
    }
 
    public static bool is_supported(){
        return cmd_exists("notify-send");
    }
}