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/*
 * evolution-cal-config-webcal.c
 *
 * 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.
 *
 * 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 Lesser General Public License
 * along with this program; if not, see <http://www.gnu.org/licenses/>.
 *
 */

#include <config.h>
#include <glib/gi18n-lib.h>

#include <libebackend/libebackend.h>

#include <e-util/e-util.h>

typedef ESourceConfigBackend ECalConfigWebcal;
typedef ESourceConfigBackendClass ECalConfigWebcalClass;

typedef struct _Context Context;

struct _Context {
    GtkWidget *url_entry;
};

/* Module Entry Points */
void e_module_load (GTypeModule *type_module);
void e_module_unload (GTypeModule *type_module);

/* Forward Declarations */
GType e_cal_config_webcal_get_type (void);

G_DEFINE_DYNAMIC_TYPE (
    ECalConfigWebcal,
    e_cal_config_webcal,
    E_TYPE_SOURCE_CONFIG_BACKEND)

static void
cal_config_webcal_context_free (Context *context)
{
    g_object_unref (context->url_entry);

    g_slice_free (Context, context);
}

static gboolean
cal_config_webcal_uri_to_text (GBinding *binding,
                               const GValue *source_value,
                               GValue *target_value,
                               gpointer user_data)
{
    SoupURI *soup_uri;
    gchar *text;

    soup_uri = g_value_get_boxed (source_value);
    soup_uri_set_user (soup_uri, NULL);

    text = soup_uri_to_string (soup_uri, FALSE);
    g_value_take_string (target_value, text);

    return TRUE;
}

static gboolean
cal_config_webcal_text_to_uri (GBinding *binding,
                               const GValue *source_value,
                               GValue *target_value,
                               gpointer user_data)
{
    ESource *source;
    SoupURI *soup_uri;
    ESourceAuthentication *extension;
    const gchar *extension_name;
    const gchar *text;
    const gchar *user;

    text = g_value_get_string (source_value);
    soup_uri = soup_uri_new (text);

    if (soup_uri == NULL)
        return FALSE;

    source = E_SOURCE (user_data);
    extension_name = E_SOURCE_EXTENSION_AUTHENTICATION;
    extension = e_source_get_extension (source, extension_name);
    user = e_source_authentication_get_user (extension);

    soup_uri_set_user (soup_uri, user);

    g_value_take_boxed (target_value, soup_uri);

    return TRUE;
}

static void
cal_config_webcal_insert_widgets (ESourceConfigBackend *backend,
                                  ESource *scratch_source)
{
    ESourceConfig *config;
    ESourceExtension *extension;
    GtkWidget *widget;
    Context *context;
    const gchar *extension_name;
    const gchar *uid;

    context = g_slice_new (Context);
    uid = e_source_get_uid (scratch_source);
    config = e_source_config_backend_get_config (backend);

    g_object_set_data_full (
        G_OBJECT (backend), uid, context,
        (GDestroyNotify) cal_config_webcal_context_free);

    e_cal_source_config_add_offline_toggle (
        E_CAL_SOURCE_CONFIG (config), scratch_source);

    widget = gtk_entry_new ();
    e_source_config_insert_widget (
        config, scratch_source, _("URL:"), widget);
    context->url_entry = g_object_ref (widget);
    gtk_widget_show (widget);

    e_source_config_add_secure_connection_for_webdav (
        config, scratch_source);

    e_source_config_add_user_entry (config, scratch_source);

    e_source_config_add_refresh_interval (config, scratch_source);

    extension_name = E_SOURCE_EXTENSION_WEBDAV_BACKEND;
    extension = e_source_get_extension (scratch_source, extension_name);

    g_object_bind_property_full (
        extension, "soup-uri",
        context->url_entry, "text",
        G_BINDING_BIDIRECTIONAL |
        G_BINDING_SYNC_CREATE,
        cal_config_webcal_uri_to_text,
        cal_config_webcal_text_to_uri,
        g_object_ref (scratch_source),
        (GDestroyNotify) g_object_unref);
}

static gboolean
cal_config_webcal_check_complete (ESourceConfigBackend *backend,
                                  ESource *scratch_source)
{
    SoupURI *soup_uri;
    GtkEntry *entry;
    Context *context;
    const gchar *uri_string;
    const gchar *scheme;
    const gchar *uid;
    gboolean complete;

    uid = e_source_get_uid (scratch_source);
    context = g_object_get_data (G_OBJECT (backend), uid);
    g_return_val_if_fail (context != NULL, FALSE);

    entry = GTK_ENTRY (context->url_entry);
    uri_string = gtk_entry_get_text (entry);

    soup_uri = soup_uri_new (uri_string);

    /* XXX webcal:// is a non-standard scheme, but we accept it.
     *     Just convert it to http:// for the URI validity test. */
    scheme = soup_uri_get_scheme (soup_uri);
    if (g_strcmp0 (scheme, "webcal") == 0)
        soup_uri_set_scheme (soup_uri, SOUP_URI_SCHEME_HTTP);

    complete = SOUP_URI_VALID_FOR_HTTP (soup_uri);

    if (soup_uri != NULL)
        soup_uri_free (soup_uri);

    return complete;
}

static void
e_cal_config_webcal_class_init (ESourceConfigBackendClass *class)
{
    EExtensionClass *extension_class;

    extension_class = E_EXTENSION_CLASS (class);
    extension_class->extensible_type = E_TYPE_CAL_SOURCE_CONFIG;

    class->parent_uid = "webcal-stub";
    class->backend_name = "webcal";
    class->insert_widgets = cal_config_webcal_insert_widgets;
    class->check_complete = cal_config_webcal_check_complete;
}

static void
e_cal_config_webcal_class_finalize (ESourceConfigBackendClass *class)
{
}

static void
e_cal_config_webcal_init (ESourceConfigBackend *backend)
{
}

G_MODULE_EXPORT void
e_module_load (GTypeModule *type_module)
{
    e_cal_config_webcal_register_type (type_module);
}

G_MODULE_EXPORT void
e_module_unload (GTypeModule *type_module)
{
}