/* GIO - GLib Input, Output and Streaming Library
 * 
 * Copyright (C) 2006-2007 Red Hat, Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General
 * Public License along with this library; if not, write to the
 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 *
 * Author: Alexander Larsson <alexl@redhat.com>
 */

#include <config.h>

#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>

#include <glib.h>
#include <glib/gi18n.h>
#include "gvfsjobmount.h"

G_DEFINE_TYPE (GVfsJobMount, g_vfs_job_mount, G_VFS_TYPE_JOB)

static void     run        (GVfsJob *job);
static gboolean try        (GVfsJob *job);
static void     send_reply (GVfsJob *job);

static void
g_vfs_job_mount_finalize (GObject *object)
{
  GVfsJobMount *job;

  job = G_VFS_JOB_MOUNT (object);

  g_mount_spec_unref (job->mount_spec);
  g_object_unref (job->mount_source);
  g_object_unref (job->backend);
  g_clear_object (&job->object);
  g_clear_object (&job->invocation);
  
  if (G_OBJECT_CLASS (g_vfs_job_mount_parent_class)->finalize)
    (*G_OBJECT_CLASS (g_vfs_job_mount_parent_class)->finalize) (object);
}

static void
g_vfs_job_mount_class_init (GVfsJobMountClass *klass)
{
  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
  GVfsJobClass *job_class = G_VFS_JOB_CLASS (klass);
  
  gobject_class->finalize = g_vfs_job_mount_finalize;
  job_class->run = run;
  job_class->try = try;
  job_class->send_reply = send_reply;
}

static void
g_vfs_job_mount_init (GVfsJobMount *job)
{
}

GVfsJob *
g_vfs_job_mount_new (GMountSpec *spec,
		     GMountSource *source,
		     gboolean is_automount,
		     GVfsDBusMountable *object,
                     GDBusMethodInvocation *invocation,
                     GVfsBackend *backend)
{
  GVfsJobMount *job;

  job = g_object_new (G_VFS_TYPE_JOB_MOUNT,
		      NULL);

  job->mount_spec = g_mount_spec_ref (spec);
  job->mount_source = g_object_ref (source);
  job->is_automount = is_automount;
  /* Ref the backend so we're sure its alive
     during the whole job request. */
  job->backend = g_object_ref (backend);
  if (object != NULL && invocation != NULL)
    {
      job->object = g_object_ref (object);
      job->invocation = g_object_ref (invocation);
    }
  
  return G_VFS_JOB (job);
}

static void
run (GVfsJob *job)
{
  GVfsJobMount *op_job = G_VFS_JOB_MOUNT (job);
  GVfsBackend *backend = op_job->backend;
  GVfsBackendClass *class = G_VFS_BACKEND_GET_CLASS (backend);

  if (class->mount == NULL)
    {
      g_vfs_job_failed (job, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
			_("Operation not supported by backend"));
      return;
    }
  
  class->mount (backend,
		op_job,
		op_job->mount_spec,
		op_job->mount_source,
		op_job->is_automount);
}

static gboolean
try (GVfsJob *job)
{
  GVfsJobMount *op_job = G_VFS_JOB_MOUNT (job);
  GVfsBackend *backend = op_job->backend;
  GVfsBackendClass *class = G_VFS_BACKEND_GET_CLASS (backend);
  gboolean result;

  if (class->try_mount == NULL)
    return FALSE;

  result = class->try_mount (backend,
			     op_job,
			     op_job->mount_spec,
			     op_job->mount_source,
			     op_job->is_automount);
  return result;
}

static void
mount_failed (GVfsJobMount *op_job, GError *error)
{
  GVfsBackend *backend;

  if (op_job->invocation)
    g_dbus_method_invocation_return_gerror (op_job->invocation, error);
  else
    g_debug ("Mount failed: %s\n", error->message);

  backend = g_object_ref (op_job->backend);
  g_vfs_job_emit_finished (G_VFS_JOB (op_job));
  
  /* Remove failed backend from daemon */
  g_vfs_job_source_closed  (G_VFS_JOB_SOURCE (backend));
  g_object_unref (backend);
}

static void
register_mount_callback (GVfsDBusMountTracker *proxy,
                         GAsyncResult *res,
                         gpointer user_data)
{
  GVfsJobMount *op_job = G_VFS_JOB_MOUNT (user_data);
  GError *error = NULL;
  
  if (! gvfs_dbus_mount_tracker_call_register_mount_finish (proxy, res, &error))
    {
      g_dbus_error_strip_remote_error (error);
      mount_failed (op_job, error);
    }
  else
    {
      if (op_job->invocation && op_job->object)
        gvfs_dbus_mountable_complete_mount (op_job->object, op_job->invocation);

      g_vfs_job_emit_finished (G_VFS_JOB (op_job));
    }

  g_clear_error (&error);
}

/* Might be called on an i/o thread */
static void
send_reply (GVfsJob *job)
{
  GVfsJobMount *op_job = G_VFS_JOB_MOUNT (job);

  g_debug ("send_reply(%p), failed=%d (%s)\n", job, job->failed,
           job->failed ? job->error->message : "");
  
  if (job->failed)
    mount_failed (op_job, job->error);
  else
    g_vfs_backend_register_mount (op_job->backend,
                                  (GAsyncReadyCallback) register_mount_callback,
				  job);
}