path: root/shell/e-local-folder.c

/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
/* e-local-folder.c
 *
 * Copyright (C) 2000  Helix Code, Inc.
 *
 * 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., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * Author: Ettore Perazzoli
 */

/* The metafile goes like this:

   <?xml version="1.0"?>
   <efolder>
           <type>mail</type>
       <description>This is the folder where I store mail from my gf</description>
       <homepage>http://www.somewhere.net</homepage>
   </efolder>

   FIXME: Do we want to use a namespace for this?
   FIXME: Do we want to have an internationalized description?
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <gnome-xml/parser.h>
#include <gnome-xml/xmlmemory.h>

#include "e-util/e-util.h"
#include "e-util/e-xml-utils.h"

#include "e-local-folder.h"


#define PARENT_TYPE E_TYPE_FOLDER
static EFolderClass *parent_class = NULL;

#define URI_PREFIX     "file://"
#define URI_PREFIX_LEN 7

#define METADATA_FILE_NAME     "folder-metadata.xml"
#define METADATA_FILE_NAME_LEN 19


static char *
get_string_value (xmlNode *node,
          const char *name)
{
    xmlNode *p;
    xmlChar *xml_string;
    char *retval;

    p = e_xml_get_child_by_name (node, (xmlChar *) name);
    if (p == NULL)
        return NULL;

    p = e_xml_get_child_by_name (p, (xmlChar *) "text");
    if (p == NULL)
        return NULL;

    xml_string = xmlNodeListGetString (node->doc, p, 1);
    retval = g_strdup ((char *) xml_string);
    xmlFree (xml_string);

    return retval;
}

static gboolean
construct_loading_metadata (ELocalFolder *local_folder,
                const char *path)
{
    EFolder *folder;
    xmlDoc *doc;
    xmlNode *root;
    char *type;
    char *description;
    char *metadata_path;

    folder = E_FOLDER (local_folder);

    metadata_path = g_concat_dir_and_file (path, METADATA_FILE_NAME);

    doc = xmlParseFile (metadata_path);
    if (doc == NULL) {
        g_free (metadata_path);
        return FALSE;
    }

    root = xmlDocGetRootElement (doc);
    if (root == NULL || strcmp (root->name, "efolder") != 0) {
        g_free (metadata_path);
        xmlFreeDoc (doc);
        return FALSE;
    }

    type = get_string_value (root, "type");
    description = get_string_value (root, "description");

    e_folder_construct (folder, g_basename (path), type, description);

    g_free (type);
    g_free (description);

    xmlFreeDoc (doc);

    local_folder->physical_uri = g_strconcat (URI_PREFIX, path, NULL);

    g_free (metadata_path);

    return TRUE;
}

static gboolean
save_metadata (ELocalFolder *local_folder)
{
    EFolder *folder;
    xmlDoc *doc;
    xmlNode *root;
    const char *physical_path;

    folder = E_FOLDER (local_folder);

    doc = xmlNewDoc ((xmlChar *) "1.0");
    root = xmlNewDocNode (doc, NULL, (xmlChar *) "efolder", NULL);
    xmlDocSetRootElement (doc, root);

    xmlNewChild (root, NULL, (xmlChar *) "type", (xmlChar *) e_folder_get_type_string (folder));
    xmlNewChild (root, NULL, (xmlChar *) "description", (xmlChar *) e_folder_get_description (folder));

    physical_path = local_folder->physical_uri + URI_PREFIX_LEN - 1;

    if (xmlSaveFile (physical_path, doc) < 0) {
        xmlFreeDoc (doc);
        return FALSE;
    }

    xmlFreeDoc (doc);
    return TRUE;
}


/* EFolder methods.  */

static const char *
get_physical_uri (EFolder *folder)
{
    ELocalFolder *local_folder;

    local_folder = E_LOCAL_FOLDER (folder);
    return local_folder->physical_uri;
}


/* GtkObject methods.  */

static void
destroy (GtkObject *object)
{
    ELocalFolder *folder;

    folder = E_LOCAL_FOLDER (object);

    g_free (folder->physical_uri);

    (* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
}


static void
class_init (ELocalFolderClass *klass)
{
    GtkObjectClass *object_class;
    EFolderClass *folder_class;

    parent_class = gtk_type_class (e_folder_get_type ());

    object_class = GTK_OBJECT_CLASS (klass);
    object_class->destroy = destroy;

    folder_class = E_FOLDER_CLASS (klass);
    folder_class->get_physical_uri = get_physical_uri;
}

static void
init (ELocalFolder *local_folder)
{
    local_folder->physical_uri = NULL;
}


EFolder *
e_local_folder_new_from_path (const char *path)
{
    EFolder *folder;

    g_return_val_if_fail (g_path_is_absolute (path), NULL);

    folder = gtk_type_new (e_local_folder_get_type ());

    if (! construct_loading_metadata (E_LOCAL_FOLDER (folder), path)) {
        gtk_object_unref (GTK_OBJECT (folder));
        return NULL;
    }

    return folder;
}

gboolean
e_local_folder_save (ELocalFolder *local_folder)
{
    g_return_val_if_fail (local_folder != NULL, FALSE);
    g_return_val_if_fail (E_IS_LOCAL_FOLDER (local_folder), FALSE);

    return save_metadata (local_folder);
}


E_MAKE_TYPE (e_local_folder, "ELocalFolder", ELocalFolder, class_init, init, PARENT_TYPE)