path: root/calendar/gui/e-task-list-selector.c

/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
/* e-task-list-selector.c
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 * 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., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */

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

#include "e-task-list-selector.h"

#include <string.h>
#include <libecal/e-cal.h>
#include "e-util/e-selection.h"
#include "calendar/common/authentication.h"
#include "calendar/gui/comp-util.h"

struct _ETaskListSelectorPrivate {
    gint dummy_value;
};

static gpointer parent_class;

static gboolean
task_list_selector_update_single_object (ECal *client,
                                         icalcomponent *icalcomp)
{
    gchar *uid;
    icalcomponent *tmp_icalcomp;

    uid = (gchar *) icalcomponent_get_uid (icalcomp);

    if (e_cal_get_object (client, uid, NULL, &tmp_icalcomp, NULL))
        return e_cal_modify_object (
            client, icalcomp, CALOBJ_MOD_ALL, NULL);

    return e_cal_create_object (client, icalcomp, &uid, NULL);
}

static gboolean
task_list_selector_update_objects (ECal *client,
                                   icalcomponent *icalcomp)
{
    icalcomponent *subcomp;
    icalcomponent_kind kind;

    kind = icalcomponent_isa (icalcomp);
    if (kind == ICAL_VTODO_COMPONENT || kind == ICAL_VEVENT_COMPONENT)
        return task_list_selector_update_single_object (
            client, icalcomp);
    else if (kind != ICAL_VCALENDAR_COMPONENT)
        return FALSE;

    subcomp = icalcomponent_get_first_component (
        icalcomp, ICAL_ANY_COMPONENT);
    while (subcomp != NULL) {
        gboolean success;

        kind = icalcomponent_isa (subcomp);
        if (kind == ICAL_VTIMEZONE_COMPONENT) {
            icaltimezone *zone;

            zone = icaltimezone_new ();
            icaltimezone_set_component (zone, subcomp);

            success = e_cal_add_timezone (client, zone, NULL);
            icaltimezone_free (zone, 1);
            if (!success)
                return FALSE;
        } else if (kind == ICAL_VTODO_COMPONENT ||
            kind == ICAL_VEVENT_COMPONENT) {
            success = task_list_selector_update_single_object (
                client, subcomp);
            if (!success)
                return FALSE;
        }

        subcomp = icalcomponent_get_next_component (
            icalcomp, ICAL_ANY_COMPONENT);
    }

    return TRUE;
}

static gboolean
task_list_selector_process_data (ESourceSelector *selector,
                                 ECal *client,
                                 const gchar *source_uid,
                                 icalcomponent *icalcomp,
                                 GdkDragAction action)
{
    ESourceList *source_list;
    ESource *source;
    icalcomponent *tmp_icalcomp = NULL;
    const gchar *uid;
    gchar *old_uid = NULL;
    gboolean success = FALSE;
    gboolean read_only = TRUE;
    GError *error = NULL;

    /* FIXME Deal with GDK_ACTION_ASK. */
    if (action == GDK_ACTION_COPY) {
        old_uid = g_strdup (icalcomponent_get_uid (icalcomp));
        uid = e_cal_component_gen_uid ();
        icalcomponent_set_uid (icalcomp, uid);
    }

    uid = icalcomponent_get_uid (icalcomp);
    if (old_uid == NULL)
        old_uid = g_strdup (uid);

    if (e_cal_get_object (client, uid, NULL, &tmp_icalcomp, &error)) {
        icalcomponent_free (tmp_icalcomp);
        success = TRUE;
        goto exit;
    }

    if (error != NULL && error->code != E_CALENDAR_STATUS_OBJECT_NOT_FOUND) {
        g_message (
            "Failed to search the object in destination "
            "task list: %s", error->message);
        g_error_free (error);
        goto exit;
    }

    success = task_list_selector_update_objects (client, icalcomp);

    if (!success || action != GDK_ACTION_MOVE)
        goto exit;

    source_list = e_source_selector_get_source_list (selector);
    source = e_source_list_peek_source_by_uid (source_list, source_uid);

    if (!E_IS_SOURCE (source) || e_source_get_readonly (source))
        goto exit;

    client = e_auth_new_cal_from_source (source, E_CAL_SOURCE_TYPE_TODO);
    if (client == NULL) {
        g_message ("Cannot create source client to remove old task");
        goto exit;
    }

    e_cal_is_read_only (client, &read_only, NULL);
    if (!read_only && e_cal_open (client, TRUE, NULL))
        e_cal_remove_object (client, old_uid, NULL);
    else if (!read_only)
        g_message ("Cannot open source client to remove old task");

    g_object_unref (client);

exit:
    g_free (old_uid);

    return success;
}

static gboolean
task_list_selector_data_dropped (ESourceSelector *selector,
                                 GtkSelectionData *selection_data,
                                 ESource *destination,
                                 GdkDragAction action,
                                 guint info)
{
    ECal *client;
    GSList *list, *iter;
    gboolean success = FALSE;

    client = e_auth_new_cal_from_source (
        destination, E_CAL_SOURCE_TYPE_TODO);

    if (client == NULL || !e_cal_open (client, TRUE, NULL))
        goto exit;

    list = cal_comp_selection_get_string_list (selection_data);

    for (iter = list; iter != NULL; iter = iter->next) {
        gchar *source_uid = iter->data;
        icalcomponent *icalcomp;
        gchar *component_string;

        /* Each string is "source_uid\ncomponent_string". */
        component_string = strchr (source_uid, '\n');
        if (component_string == NULL)
            continue;

        *component_string++ = '\0';
        icalcomp = icalparser_parse_string (component_string);
        if (icalcomp == NULL)
            continue;

        success = task_list_selector_process_data (
            selector, client, source_uid, icalcomp, action);

        icalcomponent_free (icalcomp);
    }

    g_slist_foreach (list, (GFunc) g_free, NULL);
    g_slist_free (list);

exit:
    if (client != NULL)
        g_object_unref (client);

    return success;
}

static void
task_list_selector_class_init (ETaskListSelectorClass *class)
{
    ESourceSelectorClass *source_selector_class;

    parent_class = g_type_class_peek_parent (class);
    g_type_class_add_private (class, sizeof (ETaskListSelectorPrivate));

    source_selector_class = E_SOURCE_SELECTOR_CLASS (class);
    source_selector_class->data_dropped = task_list_selector_data_dropped;
}

static void
task_list_selector_init (ETaskListSelector *selector)
{
    selector->priv = G_TYPE_INSTANCE_GET_PRIVATE (
        selector, E_TYPE_TASK_LIST_SELECTOR, ETaskListSelectorPrivate);

    gtk_drag_dest_set (
        GTK_WIDGET (selector), GTK_DEST_DEFAULT_ALL,
        NULL, 0, GDK_ACTION_COPY | GDK_ACTION_MOVE);

    e_drag_dest_add_calendar_targets (GTK_WIDGET (selector));
}

GType
e_task_list_selector_get_type (void)
{
    static GType type = 0;

    if (G_UNLIKELY (type == 0)) {
        const GTypeInfo type_info = {
            sizeof (ETaskListSelectorClass),
            (GBaseInitFunc) NULL,
            (GBaseFinalizeFunc) NULL,
            (GClassInitFunc) task_list_selector_class_init,
            (GClassFinalizeFunc) NULL,
            NULL,  /* class_data */
            sizeof (ETaskListSelector),
            0,     /* n_preallocs */
            (GInstanceInitFunc) task_list_selector_init,
            NULL   /* value_table */
        };

        type = g_type_register_static (
            E_TYPE_SOURCE_SELECTOR, "ETaskListSelector",
            &type_info, 0);
    }

    return type;
}

GtkWidget *
e_task_list_selector_new (ESourceList *source_list)
{
    g_return_val_if_fail (E_IS_SOURCE_LIST (source_list), NULL);

    return g_object_new (
        E_TYPE_TASK_LIST_SELECTOR,
        "source-list", source_list, NULL);
}