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.
 */

#include <config.h>

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

#include <string.h>
#include <libecal/libecal.h>

#include "calendar/gui/comp-util.h"

#define E_TASK_LIST_SELECTOR_GET_PRIVATE(obj) \
    (G_TYPE_INSTANCE_GET_PRIVATE \
    ((obj), E_TYPE_TASK_LIST_SELECTOR, ETaskListSelectorPrivate))

struct _ETaskListSelectorPrivate {
    gint dummy_value;
};

G_DEFINE_TYPE (
    ETaskListSelector,
    e_task_list_selector,
    E_TYPE_CLIENT_SELECTOR)

static gboolean
task_list_selector_update_single_object (ECalClient *client,
                                         icalcomponent *icalcomp)
{
    gchar *uid = NULL;
    icalcomponent *tmp_icalcomp;

    uid = (gchar *) icalcomponent_get_uid (icalcomp);

    if (e_cal_client_get_object_sync (client, uid, NULL, &tmp_icalcomp, NULL, NULL)) {
        icalcomponent_free (tmp_icalcomp);

        return e_cal_client_modify_object_sync (
            client, icalcomp, CALOBJ_MOD_ALL, NULL, NULL);
    }

    if (!e_cal_client_create_object_sync (client, icalcomp, &uid, NULL, NULL))
        return FALSE;

    if (uid)
        icalcomponent_set_uid (icalcomp, uid);

    g_free (uid);

    return TRUE;
}

static gboolean
task_list_selector_update_objects (ECalClient *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;
            GError *error = NULL;

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

            e_cal_client_add_timezone_sync (client, zone, NULL, &error);
            icaltimezone_free (zone, 1);
            if (error != NULL) {
                g_warning (
                    "%s: Failed to add timezone: %s",
                    G_STRFUNC, error->message);
                g_error_free (error);
                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 void
client_connect_cb (GObject *source_object,
                   GAsyncResult *result,
                   gpointer user_data)
{
    EClient *client;
    gchar *uid = user_data;
    GError *error = NULL;

    g_return_if_fail (uid != NULL);

    client = e_client_selector_get_client_finish (
        E_CLIENT_SELECTOR (source_object), result, &error);

    /* Sanity check. */
    g_return_if_fail (
        ((client != NULL) && (error == NULL)) ||
        ((client == NULL) && (error != NULL)));

    if (error != NULL) {
        g_warning ("%s: %s", G_STRFUNC, error->message);
        g_error_free (error);
        goto exit;
    }

    if (!e_client_is_readonly (client))
        e_cal_client_remove_object_sync (
            E_CAL_CLIENT (client), uid, NULL,
            CALOBJ_MOD_THIS, NULL, NULL);

    g_object_unref (client);

exit:
    g_free (uid);
}

static gboolean
task_list_selector_process_data (ESourceSelector *selector,
                                 ECalClient *client,
                                 const gchar *source_uid,
                                 icalcomponent *icalcomp,
                                 GdkDragAction action)
{
    ESource *source;
    ESourceRegistry *registry;
    icalcomponent *tmp_icalcomp = NULL;
    const gchar *uid;
    gchar *old_uid = NULL;
    gboolean success = FALSE;
    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_client_get_object_sync (client, uid, NULL, &tmp_icalcomp, NULL, &error)) {
        icalcomponent_free (tmp_icalcomp);
        success = TRUE;
        goto exit;
    }

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

    if (error)
        g_error_free (error);
    error = NULL;

    success = task_list_selector_update_objects (client, icalcomp);

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

    registry = e_source_selector_get_registry (selector);
    source = e_source_registry_ref_source (registry, source_uid);

    if (source != NULL) {
        e_client_selector_get_client (
            E_CLIENT_SELECTOR (selector), source, NULL,
            client_connect_cb, g_strdup (old_uid));
        g_object_unref (source);
    }

exit:
    g_free (old_uid);

    return success;
}

struct DropData
{
    ESourceSelector *selector;
    GdkDragAction action;
    GSList *list;
};

static void
client_connect_for_drop_cb (GObject *source_object,
                            GAsyncResult *result,
                            gpointer user_data)
{
    struct DropData *dd = user_data;
    EClient *client;
    ECalClient *cal_client;
    GSList *iter;
    GError *error = NULL;

    g_return_if_fail (dd != NULL);

    client = e_client_selector_get_client_finish (
        E_CLIENT_SELECTOR (source_object), result, &error);

    /* Sanity check. */
    g_return_if_fail (
        ((client != NULL) && (error == NULL)) ||
        ((client == NULL) && (error != NULL)));

    if (error != NULL) {
        g_warning ("%s: %s", G_STRFUNC, error->message);
        g_error_free (error);
        goto exit;
    }

    cal_client = E_CAL_CLIENT (client);

    for (iter = dd->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;

        task_list_selector_process_data (
            dd->selector, cal_client, source_uid,
            icalcomp, dd->action);

        icalcomponent_free (icalcomp);
    }

    g_object_unref (client);

exit:
    g_slist_foreach (dd->list, (GFunc) g_free, NULL);
    g_slist_free (dd->list);
    g_object_unref (dd->selector);
    g_free (dd);
}

static void
task_list_selector_constructed (GObject *object)
{
    ESourceSelector *selector;
    ESourceRegistry *registry;
    ESource *source;

    selector = E_SOURCE_SELECTOR (object);
    registry = e_source_selector_get_registry (selector);
    source = e_source_registry_ref_default_task_list (registry);
    e_source_selector_set_primary_selection (selector, source);
    g_object_unref (source);

    /* Chain up to parent's constructed() method. */
    G_OBJECT_CLASS (e_task_list_selector_parent_class)->
        constructed (object);
}

static gboolean
task_list_selector_data_dropped (ESourceSelector *selector,
                                 GtkSelectionData *selection_data,
                                 ESource *destination,
                                 GdkDragAction action,
                                 guint info)
{
    struct DropData *dd;

    dd = g_new0 (struct DropData, 1);
    dd->selector = g_object_ref (selector);
    dd->action = action;
    dd->list = cal_comp_selection_get_string_list (selection_data);

    e_client_selector_get_client (
        E_CLIENT_SELECTOR (selector), destination, NULL,
        client_connect_for_drop_cb, dd);

    return TRUE;
}

static void
e_task_list_selector_class_init (ETaskListSelectorClass *class)
{
    GObjectClass *object_class;
    ESourceSelectorClass *source_selector_class;

    g_type_class_add_private (class, sizeof (ETaskListSelectorPrivate));

    object_class = G_OBJECT_CLASS (class);
    object_class->constructed = task_list_selector_constructed;

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

static void
e_task_list_selector_init (ETaskListSelector *selector)
{
    selector->priv = E_TASK_LIST_SELECTOR_GET_PRIVATE (selector);

    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));
}

GtkWidget *
e_task_list_selector_new (EClientCache *client_cache)
{
    ESourceRegistry *registry;
    GtkWidget *widget;

    g_return_val_if_fail (E_IS_CLIENT_CACHE (client_cache), NULL);

    registry = e_client_cache_ref_registry (client_cache);

    widget = g_object_new (
        E_TYPE_TASK_LIST_SELECTOR,
        "client-cache", client_cache,
        "extension-name", E_SOURCE_EXTENSION_TASK_LIST,
        "registry", registry, NULL);

    g_object_unref (registry);

    return widget;
}