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/*
 * This program 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) version 3.
 *
 * 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with the program; if not, see <http://www.gnu.org/licenses/>
 *
 *
 * Authors:
 *      Chris Lahey <clahey@ximian.com>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

#include <config.h>

#include <string.h>

#include <gtk/gtk.h>
#include <glib/gi18n.h>
#include <libebook/e-book.h>
#include <libedataserver/e-url.h>
#include <libedataserverui/e-passwords.h>

#include "e-util/e-error.h"
#include "addressbook.h"

#define d(x)

static void addressbook_authenticate (EBook *book, gboolean previous_failure,
                      ESource *source, EBookCallback cb, gpointer closure);
static void auth_required_cb (EBook *book, gpointer data);

typedef struct {
    EBookCallback cb;
    ESource *source;
    gpointer closure;
    guint cancelled : 1;
} LoadSourceData;

static void
free_load_source_data (LoadSourceData *data)
{
    if (data->source)
        g_object_unref (data->source);
    g_free (data);
}

/*this function removes of anything present after semicolon
in uri*/

static gchar *
remove_parameters_from_uri (const gchar *uri)
{
    gchar *euri_str;
    EUri *euri;

    euri = e_uri_new (uri);
    euri_str = e_uri_to_string (euri, FALSE);
    e_uri_free (euri);
    return euri_str;
}

static void
load_source_auth_cb (EBook *book, EBookStatus status, gpointer closure)
{
    LoadSourceData *data = closure;
    gboolean was_in = g_object_get_data (G_OBJECT (book), "authenticated") != NULL;

    g_object_set_data (G_OBJECT (book), "authenticated", NULL);

    if (data->cancelled) {
        free_load_source_data (data);
        return;
    }

    if (status != E_BOOK_ERROR_OK) {

        /* the user clicked cancel in the password dialog */
        if (status == E_BOOK_ERROR_CANCELLED) {

            if (e_book_check_static_capability (book, "anon-access")) {

                GtkWidget *dialog;

                /* XXX "LDAP" has to be removed from the folowing message
                   so that it wil valid for other servers which provide
                   anonymous access*/

                dialog = gtk_message_dialog_new (NULL,
                        0,
                        GTK_MESSAGE_WARNING,
                        GTK_BUTTONS_OK,
                        "%s", _("Accessing LDAP Server anonymously"));
                g_signal_connect (dialog, "response", G_CALLBACK(gtk_widget_destroy), NULL);
                gtk_widget_show (dialog);
                status = E_BOOK_ERROR_OK;

                goto done;
            }
        } else if (status == E_BOOK_ERROR_INVALID_SERVER_VERSION) {
            e_error_run (NULL, "addressbook:server-version", NULL);
            status = E_BOOK_ERROR_OK;
            goto done;
        } else if (status == E_BOOK_ERROR_UNSUPPORTED_AUTHENTICATION_METHOD) {
            goto done;
        } else {
            if (status == E_BOOK_ERROR_AUTHENTICATION_FAILED) {
                const gchar *uri = e_book_get_uri (book);
                gchar *stripped_uri = remove_parameters_from_uri (uri);
                const gchar *auth_domain = e_source_get_property (data->source, "auth-domain");
                const gchar *component_name;

                component_name = auth_domain ? auth_domain : "Addressbook";

                e_passwords_forget_password (component_name, stripped_uri);

                g_free (stripped_uri);
            } else if (was_in) {
                /* We already tried to authenticate to the server, and it failed with
                   other reason than with E_BOOK_ERROR_AUTHENTICATION_FAILED, thus stop
                   poking with the server and report error to the user. */
                goto done;
            }

            g_object_set_data (G_OBJECT (book), "authenticated", GINT_TO_POINTER (1));
            addressbook_authenticate (book, TRUE, data->source, load_source_auth_cb, closure);
            return;
        }
    }

done:
    if (data->cb)
        data->cb (book, status, data->closure);

    free_load_source_data (data);
}

static gboolean
get_remember_password (ESource *source)
{
    const gchar *value;

    value = e_source_get_property (source, "remember_password");
    if (value && !g_ascii_strcasecmp (value, "true"))
        return TRUE;

    return FALSE;
}

static void
set_remember_password (ESource *source, gboolean value)
{
    e_source_set_property (source, "remember_password",
                   value ? "true" : "false");
}

static void
addressbook_authenticate (EBook *book, gboolean previous_failure, ESource *source,
              EBookCallback cb, gpointer closure)
{
    const gchar *password = NULL;
    gchar *pass_dup = NULL;
    const gchar *auth;
    const gchar *user;
    gchar *uri = remove_parameters_from_uri(e_book_get_uri (book));
    const gchar *auth_domain = e_source_get_property (source, "auth-domain");
    const gchar *component_name;

    component_name = auth_domain ? auth_domain : "Addressbook";

    password = e_passwords_get_password (component_name, uri);

    auth = e_source_get_property (source, "auth");

    if (auth && !strcmp ("ldap/simple-binddn", auth)) {
        user = e_source_get_property (source, "binddn");
    }
    else if (auth && !strcmp ("plain/password", auth)) {
        user = e_source_get_property (source, "user");
        if (!user) {
            user = e_source_get_property (source, "username");
        }
    }
    else {
        user = e_source_get_property (source, "email_addr");
    }
    if (!user)
        user = "";

    if (!password) {
        gchar *prompt;
        gchar *password_prompt;
        gboolean remember;
        const gchar *failed_auth;
        guint32 flags = E_PASSWORDS_REMEMBER_FOREVER|E_PASSWORDS_SECRET|E_PASSWORDS_ONLINE;

        if (previous_failure) {
            failed_auth = _("Failed to authenticate.\n");
            flags |= E_PASSWORDS_REPROMPT;
        }
        else {
            failed_auth = "";
        }

        password_prompt = g_strdup_printf (_("Enter password for %s (user %s)"),
                       e_source_peek_name (source), user);

        prompt = g_strconcat (failed_auth, password_prompt, NULL);
        g_free (password_prompt);

        remember = get_remember_password (source);
        pass_dup = e_passwords_ask_password (
            _("Enter password"), component_name,
            uri, prompt, flags, &remember, NULL);
        if (remember != get_remember_password (source))
            set_remember_password (source, remember);

        g_free (prompt);
    }

    if (password || pass_dup) {
        e_book_async_authenticate_user (book, user, password ? password : pass_dup,
                        e_source_get_property (source, "auth"),
                        cb, closure);
        g_free (pass_dup);
    }
    else {
        /* they hit cancel */
        cb (book, E_BOOK_ERROR_CANCELLED, closure);
    }

    g_free (uri);
}

static void
auth_required_cb (EBook *book, gpointer data)
{
    LoadSourceData *load_source_data = g_new0(LoadSourceData, 1);

    load_source_data->source = g_object_ref (g_object_ref (e_book_get_source (book)));
    load_source_data->cancelled = FALSE;
    addressbook_authenticate (book, FALSE, load_source_data->source,
                  load_source_auth_cb, load_source_data);

}
static void
load_source_cb (EBook *book, EBookStatus status, gpointer closure)
{
    LoadSourceData *load_source_data = closure;

    if (load_source_data->cancelled) {
        free_load_source_data (load_source_data);
        return;
    }

    if (status == E_BOOK_ERROR_OK && book != NULL) {
        const gchar *auth;

        auth = e_source_get_property (load_source_data->source, "auth");
        if (auth && strcmp (auth, "none")) {
            g_signal_connect (book, "auth_required", G_CALLBACK(auth_required_cb), NULL);

            if (e_book_is_online (book)) {
                addressbook_authenticate (book, FALSE, load_source_data->source,
                              load_source_auth_cb, closure);
                return;
        }
        }
    }
    load_source_data->cb (book, status, load_source_data->closure);
    free_load_source_data (load_source_data);
}

guint
addressbook_load (EBook *book,
          EBookCallback cb, gpointer closure)
{
    LoadSourceData *load_source_data = g_new0 (LoadSourceData, 1);

    load_source_data->cb = cb;
    load_source_data->closure = closure;
    load_source_data->source = g_object_ref (g_object_ref (e_book_get_source (book)));
    load_source_data->cancelled = FALSE;

    e_book_async_open (book, FALSE, load_source_cb, load_source_data);

    return GPOINTER_TO_UINT (load_source_data);
}

void
addressbook_load_cancel (guint id)
{
    LoadSourceData *load_source_data = GUINT_TO_POINTER (id);

    load_source_data->cancelled = TRUE;
}

static void
default_book_cb (EBook *book, EBookStatus status, gpointer closure)
{
    LoadSourceData *load_source_data = closure;

    if (status == E_BOOK_ERROR_OK)
        load_source_data->source = g_object_ref (e_book_get_source (book));

    load_source_cb (book, status, closure);
}

void
addressbook_load_default_book (EBookCallback cb, gpointer closure)
{
    LoadSourceData *load_source_data = g_new (LoadSourceData, 1);
    EBook *book;

    load_source_data->cb = cb;
    load_source_data->source = NULL;
    load_source_data->closure = closure;
    load_source_data->cancelled = FALSE;

    book = e_book_new_default_addressbook (NULL);
    if (!book)
        load_source_cb (NULL, E_BOOK_ERROR_OTHER_ERROR, load_source_data); /* XXX we should just use a GError and it's error code here */
    else
        e_book_async_open (book, FALSE, default_book_cb, load_source_data);
}