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/*
 * evolution-cal-config-caldav.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>

#include "e-caldav-chooser.h"
#include "e-caldav-chooser-dialog.h"

#define HTTP_PORT 80
#define HTTPS_PORT 443

typedef ESourceConfigBackend ECalConfigCalDAV;
typedef ESourceConfigBackendClass ECalConfigCalDAVClass;

typedef struct _Context Context;

struct _Context {
    ESourceConfigBackend *backend;      /* not referenced */
    ESource *scratch_source;        /* not referenced */

    GtkWidget *url_entry;
    GtkWidget *email_entry;
    GtkWidget *find_button;
    GtkWidget *auto_schedule_toggle;
};

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

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

G_DEFINE_DYNAMIC_TYPE (
    ECalConfigCalDAV,
    e_cal_config_caldav,
    E_TYPE_SOURCE_CONFIG_BACKEND)

static Context *
cal_config_caldav_context_new (ESourceConfigBackend *backend,
                               ESource *scratch_source)
{
    Context *context;

    context = g_slice_new0 (Context);
    context->backend = backend;
    context->scratch_source = scratch_source;

    return context;
}

static void
cal_config_caldav_context_free (Context *context)
{
    g_object_unref (context->url_entry);
    g_object_unref (context->email_entry);
    g_object_unref (context->find_button);
    g_object_unref (context->auto_schedule_toggle);

    g_slice_free (Context, context);
}

static void
cal_config_caldav_run_dialog (GtkButton *button,
                              Context *context)
{
    ESourceConfig *config;
    ESourceRegistry *registry;
    ECalClientSourceType source_type;
    GtkWidget *dialog;
    GtkWidget *widget;
    gpointer parent;

    config = e_source_config_backend_get_config (context->backend);
    registry = e_source_config_get_registry (config);

    parent = gtk_widget_get_toplevel (GTK_WIDGET (config));
    parent = gtk_widget_is_toplevel (parent) ? parent : NULL;

    source_type = e_cal_source_config_get_source_type (
        E_CAL_SOURCE_CONFIG (config));

    widget = e_caldav_chooser_new (
        registry, context->scratch_source, source_type);

    dialog = e_caldav_chooser_dialog_new (
        E_CALDAV_CHOOSER (widget), parent);

    if (parent != NULL)
        g_object_bind_property (
            parent, "icon-name",
            dialog, "icon-name",
            G_BINDING_SYNC_CREATE);

    gtk_dialog_run (GTK_DIALOG (dialog));

    gtk_widget_destroy (dialog);
}

static gboolean
cal_config_caldav_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_caldav_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_caldav_insert_widgets (ESourceConfigBackend *backend,
                                  ESource *scratch_source)
{
    ESourceConfig *config;
    ESource *collection_source;
    ESourceExtension *extension;
    ECalClientSourceType source_type;
    GtkWidget *widget;
    Context *context;
    const gchar *extension_name;
    const gchar *label;
    const gchar *uid;

    config = e_source_config_backend_get_config (backend);
    collection_source = e_source_config_get_collection_source (config);

    e_cal_source_config_add_offline_toggle (
        E_CAL_SOURCE_CONFIG (config), scratch_source);

    /* If this data source is a collection member,
     * just add a refresh interval and skip the rest. */
    if (collection_source != NULL) {
        e_source_config_add_refresh_interval (config, scratch_source);
        return;
    }

    uid = e_source_get_uid (scratch_source);
    context = cal_config_caldav_context_new (backend, scratch_source);

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

    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);

    source_type = e_cal_source_config_get_source_type (
        E_CAL_SOURCE_CONFIG (config));

    switch (source_type) {
        case E_CAL_CLIENT_SOURCE_TYPE_EVENTS:
            label = _("Find Calendars");
            break;
        case E_CAL_CLIENT_SOURCE_TYPE_MEMOS:
            label = _("Find Memo Lists");
            break;
        case E_CAL_CLIENT_SOURCE_TYPE_TASKS:
            label = _("Find Task Lists");
            break;
        default:
            g_return_if_reached ();
    }

    widget = gtk_button_new_with_label (label);
    e_source_config_insert_widget (
        config, scratch_source, NULL, widget);
    context->find_button = g_object_ref (widget);
    gtk_widget_show (widget);

    g_signal_connect (
        widget, "clicked",
        G_CALLBACK (cal_config_caldav_run_dialog), context);

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

    widget = gtk_check_button_new_with_label (
        _("Server handles meeting invitations"));
    e_source_config_insert_widget (
        config, scratch_source, NULL, widget);
    context->auto_schedule_toggle = g_object_ref (widget);
    gtk_widget_show (widget);

    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 (
        extension, "calendar-auto-schedule",
        context->auto_schedule_toggle, "active",
        G_BINDING_BIDIRECTIONAL |
        G_BINDING_SYNC_CREATE);

    e_binding_bind_object_text_property (
        extension, "email-address",
        context->email_entry, "text",
        G_BINDING_BIDIRECTIONAL |
        G_BINDING_SYNC_CREATE);

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

static gboolean
cal_config_caldav_check_complete (ESourceConfigBackend *backend,
                                  ESource *scratch_source)
{
    ESourceConfig *config;
    ESource *collection_source;
    Context *context;
    const gchar *uid;
    const gchar *uri_string;
    SoupURI *soup_uri;
    gboolean complete;

    config = e_source_config_backend_get_config (backend);
    collection_source = e_source_config_get_collection_source (config);

    if (collection_source != NULL)
        return TRUE;

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

    uri_string = gtk_entry_get_text (GTK_ENTRY (context->url_entry));
    soup_uri = soup_uri_new (uri_string);

    if (!soup_uri) {
        complete = FALSE;
    } else {
        if (g_strcmp0 (soup_uri_get_scheme (soup_uri), "caldav") == 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);

    gtk_widget_set_sensitive (context->find_button, complete);

    return complete;
}

static void
e_cal_config_caldav_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 = "caldav-stub";
    class->backend_name = "caldav";
    class->insert_widgets = cal_config_caldav_insert_widgets;
    class->check_complete = cal_config_caldav_check_complete;
}

static void
e_cal_config_caldav_class_finalize (ESourceConfigBackendClass *class)
{
}

static void
e_cal_config_caldav_init (ESourceConfigBackend *backend)
{
}

G_MODULE_EXPORT void
e_module_load (GTypeModule *type_module)
{
    e_caldav_chooser_type_register (type_module);
    e_caldav_chooser_dialog_type_register (type_module);
    e_cal_config_caldav_register_type (type_module);
}

G_MODULE_EXPORT void
e_module_unload (GTypeModule *type_module)
{
}