path: root/addressbook/gui/component/e-ldap-storage.c

/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
/* e-ldap-storage.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: Chris Toshok
 */

/* The ldap server file goes like this:

   <?xml version="1.0"?>
   <contactservers>
     <contactserver>
           <name>LDAP Server</name>
       <description>This is my company address book.</description>
       <host>ldap.server.com</host>
       <port>389</port>
       <rootdn></rootdn>
     </contactserver>
   </contactservers>

   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 <bonobo.h>

#include "evolution-shell-component.h"
#include "evolution-storage.h"

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

#include "e-ldap-storage.h"
#include "e-ldap-server-dialog.h"

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

#include <sys/types.h>
#include <sys/fcntl.h>
#include <sys/stat.h>
#include <errno.h>

#define LDAPSERVER_XML "ldapservers.xml"

static gboolean load_ldap_data (EvolutionStorage *storage, const char *file_path);
static gboolean save_ldap_data (const char *file_path);

GHashTable *servers;
EvolutionStorage *storage;
static char *ldapservers;

void
setup_ldap_storage (EvolutionShellComponent *shell_component,
            const char *evolution_homedir)
{
    EvolutionShellClient *shell_client;
    Evolution_Shell corba_shell;

    shell_client = evolution_shell_component_get_owner (shell_component);
    if (shell_client == CORBA_OBJECT_NIL) {
        g_warning ("We have no shell!?");
        return;
    }

    corba_shell = bonobo_object_corba_objref (BONOBO_OBJECT (shell_client));

    storage = evolution_storage_new (_("External Directories"));
    if (evolution_storage_register_on_shell (storage, corba_shell) != EVOLUTION_STORAGE_OK) {
        g_warning ("Cannot register storage");
        return;
    }

    /* save the storage for later */
    servers = g_hash_table_new (g_str_hash, g_str_equal);

    gtk_object_set_data (GTK_OBJECT (shell_component), "e-storage", storage);

    if (ldapservers)
        g_free (ldapservers);
    ldapservers = g_strdup_printf ("%s/" LDAPSERVER_XML, evolution_homedir);
    load_ldap_data (storage, ldapservers);
}

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) /* there's no text between the tags, return the empty string */
        return g_strdup("");

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

    return retval;
}

static gboolean
load_ldap_data (EvolutionStorage *storage,
        const char *file_path)
{
    xmlDoc *doc;
    xmlNode *root;
    xmlNode *child;

 tryagain:
    doc = xmlParseFile (file_path);
    if (doc == NULL) {
        /* check to see if a ldapserver.xml.new file is
                   there.  if it is, rename it and run with it */
        char *new_path = g_strdup_printf ("%s.new", file_path);
        struct stat sb;

        if (stat (new_path, &sb) == 0) {
            int rv;

            rv = rename (new_path, file_path);
            g_free (new_path);

            if (0 > rv) {
                g_error ("Failed to rename ldapserver.xml: %s\n", strerror(errno));
                return FALSE;
            }
            else {
                goto tryagain;
            }
        }

        g_free (new_path);
        return TRUE;
    }

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

    for (child = root->childs; child; child = child->next) {
        char *path;
        ELDAPServer *server;

        if (strcmp (child->name, "contactserver")) {
            g_warning ("unknown node '%s' in %s", child->name, file_path);
            continue;
        }

        server = g_new (ELDAPServer, 1);

        server->name = get_string_value (child, "name");
        server->description = get_string_value (child, "description");
        server->port = get_string_value (child, "port");
        server->host = get_string_value (child, "host");
        server->rootdn = get_string_value (child, "rootdn");
        server->scope = get_string_value (child, "scope");
        server->uri = g_strdup_printf ("ldap://%s:%s/%s??%s", server->host, server->port, server->rootdn, server->scope);

        path = g_strdup_printf ("/%s", server->name);
        evolution_storage_new_folder (storage, path, "contacts", server->uri, server->description);

        g_hash_table_insert (servers, server->name, server);

        g_free (path);
    }

    xmlFreeDoc (doc);

    return TRUE;
}

static void
ldap_server_foreach(gpointer key, gpointer value, gpointer user_data)
{
    ELDAPServer *server = (ELDAPServer*)value;
    xmlNode *root = (xmlNode*)user_data;
    xmlNode *server_root = xmlNewNode (NULL,
                       (xmlChar *) "contactserver");

    xmlAddChild (root, server_root);

    xmlNewChild (server_root, NULL, (xmlChar *) "name",
             (xmlChar *) server->name);
    xmlNewChild (server_root, NULL, (xmlChar *) "description",
             (xmlChar *) server->description);

    xmlNewChild (server_root, NULL, (xmlChar *) "port",
             (xmlChar *) server->port);
    xmlNewChild (server_root, NULL, (xmlChar *) "host",
             (xmlChar *) server->host);
    xmlNewChild (server_root, NULL, (xmlChar *) "rootdn",
             (xmlChar *) server->rootdn);
    xmlNewChild (server_root, NULL, (xmlChar *) "scope",
             (xmlChar *) server->scope);
}

static gboolean
save_ldap_data (const char *file_path)
{
    xmlDoc *doc;
    xmlNode *root;
    int fd, rv;
    xmlChar *buf;
    int buf_size;
    char *new_path = g_strdup_printf ("%s.new", file_path);

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

    g_hash_table_foreach (servers, ldap_server_foreach, root);

    fd = open (new_path, O_CREAT | O_TRUNC | O_WRONLY, 0600);
    fchmod (fd, 0600);

    xmlDocDumpMemory (doc, &buf, &buf_size);

    if (buf == NULL) {
        g_error ("Failed to write ldapserver.xml: xmlBufferCreate() == NULL");
        return FALSE;
    }

    rv = write (fd, buf, buf_size);
    xmlFree (buf);
    close (fd);

    if (0 > rv) {
        g_error ("Failed to write new ldapserver.xml: %s\n", strerror(errno));
        unlink (new_path);
        return FALSE;
    }
    else {
        if (0 > rename (new_path, file_path)) {
            g_error ("Failed to rename ldapserver.xml: %s\n", strerror(errno));
            unlink (new_path);
            return FALSE;
        }
        return TRUE;
    }
}

void
e_ldap_storage_add_server (ELDAPServer *server)
{
    char *path;
    /* add it to our hashtable */
    g_hash_table_insert (servers, server->name, server);

    /* and then to the ui */
    path = g_strdup_printf ("/%s", server->name);
    evolution_storage_new_folder (storage, path, "contacts", server->uri, server->description);

    g_free (path);

    save_ldap_data (ldapservers);
}

void
e_ldap_storage_remove_server (char *name)
{
    char *path;
    ELDAPServer *server;

    /* remove it from our hashtable */
    server = (ELDAPServer*)g_hash_table_lookup (servers, name);
    g_hash_table_remove (servers, name);

    g_free (server->name);
    g_free (server->description);
    g_free (server->host);
    g_free (server->port);
    g_free (server->rootdn);
    g_free (server->scope);
    g_free (server->uri);

    g_free (server);

    /* and then from the ui */
    path = g_strdup_printf ("/%s", name);
    evolution_storage_removed_folder (storage, path);

    g_free (path);

    save_ldap_data (ldapservers);
}