/* gdm-motd.c - Message of the Day support in gnome-session.

   Copyright (C) 1998, 1999 Tom Tromey

   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, 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., 59 Temple Place - Suite 330, Boston, MA
   02111-1307, USA.  */

#include <config.h>
#include <glib/gi18n.h>
#include <gtk/gtkmessagedialog.h>
#include <libgnomevfs/gnome-vfs-ops.h>
#ifdef HAVE_LIBNOTIFY
#include <libnotify/notify.h>
#endif
#include "gsm-motd.h"

static gchar *motd_contents = NULL;
static GnomeVFSMonitorHandle *monitor_handle = NULL;

static void
display_message_of_the_day_dialog (void)
{
  GtkWidget *dialog;

  if (motd_contents)
    {
      dialog = gtk_message_dialog_new_with_markup (NULL, 0, GTK_MESSAGE_INFO, GTK_BUTTONS_CLOSE,
						   "<big><b>%s</b></big>\n%s",
						   _("Message of the Day"), motd_contents);
      g_signal_connect (G_OBJECT (dialog), "response", G_CALLBACK (gtk_widget_destroy), NULL);
      gtk_widget_show (dialog);
    }
}

#ifdef HAVE_LIBNOTIFY
static void
display_message_of_the_day_notification (void)
{
  static NotifyIcon *icon = NULL;

  if (!motd_contents)
    return;

  if (!notify_is_initted () && !notify_init (_("Session Manager")))
    {
      g_printerr ("Could not contact the notification daemon");
      display_message_of_the_day_dialog ();
    }
  else
    {
      if (!icon)
	      icon = notify_icon_new_from_uri ("gtk-help");

      if (!notify_send_notification (NULL,
				     "device",
				     NOTIFY_URGENCY_NORMAL,
				     _("Message of the Day"),
				     motd_contents,
				     icon,
				     FALSE, 0,
				     NULL,
				     NULL,
				     0))
        {
  	  display_message_of_the_day_dialog ();
	}
    }
}
#endif

static void
motd_changed_cb (GnomeVFSMonitorHandle *handle,
		 const gchar *monitor_uri,
		 const gchar *info_uri,
		 GnomeVFSMonitorEventType event_type,
		 gpointer user_data)
{
  gchar *contents;
  gsize length;

  switch (event_type)
    {
      case GNOME_VFS_MONITOR_EVENT_CHANGED :
      case GNOME_VFS_MONITOR_EVENT_CREATED :
	if (g_file_get_contents ("/etc/motd", &contents, &length, NULL))
	  {
	    if (length > 0)
	      {
		g_free (motd_contents);
	        motd_contents = contents;

#ifdef HAVE_LIBNOTIFY
		display_message_of_the_day_notification ();
#else
		display_message_of_the_day_dialog ();
#endif
	      }
	  }
        break;
      case GNOME_VFS_MONITOR_EVENT_DELETED :
        g_free (motd_contents);
	motd_contents = NULL;
        break;
    }
}

static gboolean
on_login_cb (gpointer user_data)
{
#ifdef HAVE_LIBNOTIFY
  display_message_of_the_day_notification ();
#else
  display_message_of_the_day_dialog ();
#endif

  return FALSE;
}

void
gsm_motd_start (void)
{
  gchar *contents;
  gsize length;

  /* load the MOTD file */
  if (gnome_vfs_monitor_add (&monitor_handle, "file:///etc/motd", GNOME_VFS_MONITOR_FILE,
			     (GnomeVFSMonitorCallback) motd_changed_cb, NULL) != GNOME_VFS_OK)
    {
      g_printerr ("Failed to setup monitor for /etc/motd file");
    }

  if (g_file_get_contents ("/etc/motd", &contents, &length, NULL))
    {
      if (length > 0)
        motd_contents = contents;
    }

  /* install a timeout to show the message first time */
  g_timeout_add (8000, (GSourceFunc) on_login_cb, NULL);
}

void
gsm_motd_stop (void)
{
  if (monitor_handle)
    {
      gnome_vfs_monitor_cancel (monitor_handle);
      monitor_handle = NULL;
    }

  if (motd_contents)
    {
      g_free (motd_contents);
      motd_contents = NULL;
    }
}