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

/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
/* e-ldap-storage.c
 *
 * Copyright (C) 2000  Ximian, Inc.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU General Public
 * License as published by the Free Software Foundation.
 *
 * 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 addressbook-sources.xml file goes like this:

   <?xml version="1.0"?>
   <addressbooks>
     <contactserver>
           <name>LDAP Server</name>
       <host>ldap.server.com</host>
       <port>389</port>
       <rootdn></rootdn>
       <authmethod>simple</authmethod>
       <emailaddr>toshok@blubag.com</emailaddr>
       <limit>100</limit>
       <rememberpass/>
     </contactserver>
   </addressbooks>
 */

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

#include "addressbook-storage.h"

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

#include <glib.h>
#include <gtk/gtk.h>
#include <libxml/parser.h>
#include <libxml/xmlmemory.h>

#include <libgnome/gnome-i18n.h>
#include <libgnome/gnome-util.h>
#include <bonobo/bonobo-object.h>

#include <gal/util/e-util.h>
#include <gal/util/e-xml-utils.h>
#include <libgnome/gnome-i18n.h>

#include "evolution-shell-component.h"

#include "addressbook-config.h"

#define ADDRESSBOOK_SOURCES_XML "addressbook-sources.xml"

#ifdef HAVE_LDAP
static gboolean load_source_data (const char *file_path);
#endif

static gboolean save_source_data (const char *file_path);
static void deregister_storage (void);

static GList *sources;
static EvolutionStorage *storage;
static char *storage_path;
static GNOME_Evolution_Shell corba_shell;

void
addressbook_storage_setup (EvolutionShellComponent *shell_component,
               const char *evolution_homedir)
{
    EvolutionShellClient *shell_client;

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

    corba_shell = evolution_shell_client_corba_objref (shell_client);

    sources = NULL;

    if (storage_path)
        g_free (storage_path);
    storage_path = g_build_filename (evolution_homedir, ADDRESSBOOK_SOURCES_XML, NULL);
#ifdef HAVE_LDAP
    if (!load_source_data (storage_path))
        deregister_storage ();
#endif 
}

void
addressbook_storage_cleanup (void)
{
    if (storage != NULL) {
        bonobo_object_unref (storage);
        storage = NULL;
    }
}

#ifdef HAVE_LDAP
static void
notify_listener (const Bonobo_Listener listener, 
         GNOME_Evolution_Storage_Result corba_result)
{
    CORBA_any any;
    CORBA_Environment ev;

    CORBA_exception_init (&ev);

    any._type = TC_GNOME_Evolution_Storage_Result;
    any._value = &corba_result;

    Bonobo_Listener_event (listener, "result", &any, &ev);

    CORBA_exception_free (&ev);
}

static void
remove_ldap_folder (EvolutionStorage *storage, const Bonobo_Listener listener,
            const CORBA_char *path, const CORBA_char *physical_uri,
            gpointer data)
{
    
    addressbook_storage_remove_source (path + 1);
    addressbook_storage_write_sources();

    notify_listener (listener, GNOME_Evolution_Storage_OK);
}

static void
create_ldap_folder (EvolutionStorage *storage, const Bonobo_Listener listener,
            const CORBA_char *path, const CORBA_char *type,
            const CORBA_char *description, const CORBA_char *parent_physical_uri,
            gpointer data)
{
    if (strcmp (type, "contacts")) {
        notify_listener (listener, GNOME_Evolution_Storage_UNSUPPORTED_TYPE);
        return;
    }

    if (strcmp (parent_physical_uri, "")) {/* ldap servers can't have subfolders */
        notify_listener (listener, GNOME_Evolution_Storage_INVALID_URI);
        return;
    }
    addressbook_config_create_new_source (path + 1, NULL);

    notify_listener (listener, GNOME_Evolution_Storage_OK);
}
#endif


EvolutionStorage *
addressbook_get_other_contact_storage (void) 
{
#ifdef HAVE_LDAP
    EvolutionStorageResult result;

    if (storage == NULL) {
        storage = evolution_storage_new (_("Other Contacts"), FALSE);
        g_signal_connect (storage,
                  "remove_folder",
                  G_CALLBACK (remove_ldap_folder), NULL);
        g_signal_connect (storage,
                  "create_folder",
                  G_CALLBACK (create_ldap_folder), NULL);
        result = evolution_storage_register_on_shell (storage, corba_shell);
        switch (result) {
        case EVOLUTION_STORAGE_OK:
            break;
        case EVOLUTION_STORAGE_ERROR_GENERIC : 
            g_warning("register_storage: generic error");
            break;
        case EVOLUTION_STORAGE_ERROR_CORBA : 
            g_warning("register_storage: corba error");
            break;
        case EVOLUTION_STORAGE_ERROR_ALREADYREGISTERED :
            g_warning("register_storage: already registered error");
            break;
        case EVOLUTION_STORAGE_ERROR_EXISTS :
            g_warning("register_storage: already exists error");
            break;
        default:
            g_warning("register_storage: other error");
            break;
        }
    }
#endif

    return storage;
}

static void 
deregister_storage (void)
{
    if (evolution_storage_deregister_on_shell (storage, corba_shell) != 
        EVOLUTION_STORAGE_OK) {
        g_warning("couldn't deregister storage");
    }

    storage = NULL;
}

#ifdef HAVE_LDAP
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 int
get_integer_value (xmlNode *node,
           const char *name,
           int defval)
{
    xmlNode *p;
    xmlChar *xml_string;
    int retval;

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

    p = e_xml_get_child_by_name (p, (xmlChar *) "text");
    if (p == NULL) /* there's no text between the tags, return the default */
        return defval;

    xml_string = xmlNodeListGetString (node->doc, p, 1);
    retval = atoi (xml_string);
    xmlFree (xml_string);

    return retval;
}
#endif

static char *
ldap_unparse_auth (AddressbookLDAPAuthType auth_type)
{
    switch (auth_type) {
    case ADDRESSBOOK_LDAP_AUTH_NONE:
        return "none";
    case ADDRESSBOOK_LDAP_AUTH_SIMPLE_EMAIL:
        return "ldap/simple-email";
    case ADDRESSBOOK_LDAP_AUTH_SIMPLE_BINDDN:
        return "ldap/simple-binddn";
    default:
        g_assert(0);
        return "none";
    }
}

#ifdef HAVE_LDAP
static AddressbookLDAPAuthType
ldap_parse_auth (const char *auth)
{
    if (!auth)
        return ADDRESSBOOK_LDAP_AUTH_NONE;

    if (!strcmp (auth, "ldap/simple-email") || !strcmp (auth, "simple"))
        return ADDRESSBOOK_LDAP_AUTH_SIMPLE_EMAIL;
    else if (!strcmp (auth, "ldap/simple-binddn"))
        return ADDRESSBOOK_LDAP_AUTH_SIMPLE_BINDDN;
    else
        return ADDRESSBOOK_LDAP_AUTH_NONE;
}
#endif

static char *
ldap_unparse_scope (AddressbookLDAPScopeType scope_type)
{
    switch (scope_type) {
    case ADDRESSBOOK_LDAP_SCOPE_BASE:
        return "base";
    case ADDRESSBOOK_LDAP_SCOPE_ONELEVEL:
        return "one";
    case ADDRESSBOOK_LDAP_SCOPE_SUBTREE:
        return "sub";
    default:
        g_assert(0);
        return "";
    }
}

#ifdef HAVE_LDAP
static AddressbookLDAPScopeType
ldap_parse_scope (const char *scope)
{
    if (!scope)
        return ADDRESSBOOK_LDAP_SCOPE_SUBTREE; /* XXX good default? */

    if (!strcmp (scope, "base"))
        return ADDRESSBOOK_LDAP_SCOPE_BASE;
    else if (!strcmp (scope, "one"))
        return ADDRESSBOOK_LDAP_SCOPE_ONELEVEL;
    else
        return ADDRESSBOOK_LDAP_SCOPE_SUBTREE;
}
#endif

static char *
ldap_unparse_ssl (AddressbookLDAPSSLType ssl_type)
{
    switch (ssl_type) {
    case ADDRESSBOOK_LDAP_SSL_NEVER:
        return "never";
    case ADDRESSBOOK_LDAP_SSL_WHENEVER_POSSIBLE:
        return "whenever_possible";
    case ADDRESSBOOK_LDAP_SSL_ALWAYS:
        return "always";
    default:
        g_assert(0);
        return "";
    }
}

#ifdef HAVE_LDAP
static AddressbookLDAPSSLType
ldap_parse_ssl (const char *ssl)
{
    if (!ssl)
        return ADDRESSBOOK_LDAP_SSL_WHENEVER_POSSIBLE; /* XXX good default? */

    if (!strcmp (ssl, "always"))
        return ADDRESSBOOK_LDAP_SSL_ALWAYS;
    else if (!strcmp (ssl, "never"))
        return ADDRESSBOOK_LDAP_SSL_NEVER;
    else
        return ADDRESSBOOK_LDAP_SSL_WHENEVER_POSSIBLE;
}
#endif

const char*
addressbook_storage_auth_type_to_string (AddressbookLDAPAuthType auth_type)
{
    return ldap_unparse_auth (auth_type);
}

void
addressbook_storage_init_source_uri (AddressbookSource *source)
{
    GString *str;

    if (source->uri)
        g_free (source->uri);

    str = g_string_new ("ldap://");

    g_string_append_printf (str, "%s:%s/%s?"/*trigraph prevention*/"?%s",
                source->host,
                source->port,
                source->rootdn,
                ldap_unparse_scope (source->scope));

    g_string_append_printf (str, ";limit=%d", source->limit);

    g_string_append_printf (str, ";ssl=%s", ldap_unparse_ssl (source->ssl));

#if 0
    g_string_append_printf (str, ";timeout=%d", source->timeout);
#endif

    source->uri = str->str;

    g_string_free (str, FALSE);
}

#ifdef HAVE_LDAP
static gboolean
load_source_data (const char *file_path)
{
    xmlDoc *doc;
    xmlNode *root;
    xmlNode *child;

    addressbook_get_other_contact_storage();

 tryagain:
    doc = xmlParseFile (file_path);
    if (doc == NULL) {
        /* Check to see if a addressbook-sources.xml.new file
                   exists.  If it does, rename it and try loading 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 (rv < 0) {
                g_error ("Failed to rename %s: %s\n",
                     file_path,
                     strerror(errno));
                return FALSE;
            } else
                goto tryagain;
        }

        g_free (new_path);
        return FALSE;
    }

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

    for (child = root->children; child; child = child->next) {
        char *path;
        AddressbookSource *source;

        source = g_new0 (AddressbookSource, 1);

        if (!strcmp (child->name, "contactserver")) {
            source->port   = get_string_value (child, "port");
            source->host   = get_string_value (child, "host");
            source->rootdn = get_string_value (child, "rootdn");
            source->scope  = ldap_parse_scope (get_string_value (child, "scope"));
            source->auth   = ldap_parse_auth (get_string_value (child, "authmethod"));
            source->ssl    = ldap_parse_ssl (get_string_value (child, "ssl"));
            source->email_addr = get_string_value (child, "emailaddr");
            source->binddn = get_string_value (child, "binddn");
            source->limit  = get_integer_value (child, "limit", 100);
        }
        else if (!strcmp (child->name, "text")) {
            if (child->content) {
                int i;
                for (i = 0; i < strlen (child->content); i++) {
                    if (!isspace (child->content[i])) {
                        g_warning ("illegal text in contactserver list.");
                        break;
                    }
                }
            }
            g_free (source);
            continue;
        }
        else {
            g_warning ("unknown node '%s' in %s", child->name, file_path);
            g_free (source);
            continue;
        }

        addressbook_storage_init_source_uri (source);

        source->name = get_string_value (child, "name");
        source->description = get_string_value (child, "description");

        path = g_strdup_printf ("/%s", source->name);
        evolution_storage_new_folder (storage, path, source->name,
                          "contacts/ldap", source->uri,
                          source->description, NULL, 0, FALSE, 0);

        sources = g_list_append (sources, source);

        g_free (path);
    }

    if (g_list_length (sources) == 0)
        deregister_storage();

    xmlFreeDoc (doc);
    return TRUE;
}
#endif

static void
ldap_source_foreach(AddressbookSource *source, xmlNode *root)
{
    xmlNode *source_root = xmlNewNode (NULL,
                       (xmlChar *) "contactserver");

    xmlAddChild (root, source_root);

    xmlNewChild (source_root, NULL, (xmlChar *) "name",
             (xmlChar *) source->name);
    xmlNewChild (source_root, NULL, (xmlChar *) "description",
             (xmlChar *) source->description);

    xmlNewChild (source_root, NULL, (xmlChar *) "port",
             (xmlChar *) source->port);
    xmlNewChild (source_root, NULL, (xmlChar *) "host",
             (xmlChar *) source->host);
    xmlNewChild (source_root, NULL, (xmlChar *) "rootdn",
             (xmlChar *) source->rootdn);
    xmlNewChild (source_root, NULL, (xmlChar *) "scope",
             (xmlChar *) ldap_unparse_scope(source->scope));
    xmlNewChild (source_root, NULL, (xmlChar *) "authmethod",
             (xmlChar *) ldap_unparse_auth(source->auth));
    xmlNewChild (source_root, NULL, (xmlChar *) "ssl",
             (xmlChar *) ldap_unparse_ssl(source->ssl));

    if (source->limit != 100) {
        char *string;
        string = g_strdup_printf ("%d", source->limit);
        xmlNewChild (source_root, NULL, (xmlChar *) "limit",
                 (xmlChar *) string);
        g_free (string);
    }

    if (source->auth != ADDRESSBOOK_LDAP_AUTH_NONE) {
        if (source->auth == ADDRESSBOOK_LDAP_AUTH_SIMPLE_BINDDN)
            xmlNewChild (source_root, NULL, (xmlChar *) "binddn",
                     (xmlChar *) source->binddn);
        else
            xmlNewChild (source_root, NULL, (xmlChar *) "emailaddr",
                     (xmlChar *) source->email_addr);

        if (source->remember_passwd)
            xmlNewChild (source_root, NULL, (xmlChar *) "rememberpass",
                     NULL);
    }
}

static gboolean
save_source_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 *) "addressbooks", NULL);
    xmlDocSetRootElement (doc, root);

    g_list_foreach (sources, (GFunc)ldap_source_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 %s: xmlBufferCreate() == NULL", file_path);
        return FALSE;
    }

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

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

void
addressbook_storage_add_source (AddressbookSource *source)
{
    char *path;

    sources = g_list_append (sources, source);

    /* And then to the ui */
    addressbook_get_other_contact_storage();
    path = g_strdup_printf ("/%s", source->name);
    evolution_storage_new_folder (storage, path, source->name, "contacts/ldap",
                      source->uri, source->description, NULL, 0, FALSE, 0);

    g_free (path);
}

void
addressbook_storage_remove_source (const char *name)
{
    char *path;
    AddressbookSource *source = NULL;
    GList *l;

    /* remove it from our hashtable */
    for (l = sources; l; l = l->next) {
        AddressbookSource *s = l->data;
        if (!strcmp (s->name, name)) {
            source = s;
            break;
        }
    }

    if (!source)
        return;

    sources = g_list_remove_link (sources, l);
    g_list_free_1 (l);

    addressbook_source_free (source);

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

    if (g_list_length (sources) == 0) 
        deregister_storage ();

    g_free (path);
}

GList *
addressbook_storage_get_sources ()
{
    return sources;
}

AddressbookSource *
addressbook_storage_get_source_by_uri (const char *uri)
{
    GList *l;

    for (l = sources; l ; l = l->next) {
        AddressbookSource *source = l->data;
        if (!strcmp (uri, source->uri))
            return source;
    }

    return NULL;
}

void
addressbook_source_free (AddressbookSource *source)
{
    g_free (source->name);
    g_free (source->description);
    g_free (source->uri);
    g_free (source->host);
    g_free (source->port);
    g_free (source->rootdn);
    g_free (source->email_addr);
    g_free (source->binddn);

    g_free (source);
}

static void
addressbook_source_foreach (AddressbookSource *source, gpointer data)
{
    char *path = g_strdup_printf ("/%s", source->name);

    evolution_storage_removed_folder (storage, path);

    g_free (path);

    addressbook_source_free (source);
}

void
addressbook_storage_clear_sources (void)
{
    g_list_foreach (sources, (GFunc)addressbook_source_foreach, NULL);
    g_list_free (sources);
    deregister_storage ();
    sources = NULL;
}

void
addressbook_storage_write_sources (void)
{
    save_source_data (storage_path);
}

AddressbookSource *
addressbook_source_copy (const AddressbookSource *source)
{
    AddressbookSource *copy;

    copy = g_new0 (AddressbookSource, 1);
    copy->name = g_strdup (source->name);
    copy->description = g_strdup (source->description);
    copy->uri = g_strdup (source->uri);

    copy->host = g_strdup (source->host);
    copy->port = g_strdup (source->port);
    copy->rootdn = g_strdup (source->rootdn);
    copy->scope = source->scope;
    copy->auth = source->auth;
    copy->ssl = source->ssl;
    copy->email_addr = g_strdup (source->email_addr);
    copy->binddn = g_strdup (source->binddn);
    copy->remember_passwd = source->remember_passwd;
    copy->limit = source->limit;

    return copy;
}