/*
 * Purple - Internet Messaging Library
 * Copyright (C) Pidgin Developers <devel@pidgin.im>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * 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, see <https://www.gnu.org/licenses/>.
 */

#if !defined(PURPLE_GLOBAL_HEADER_INSIDE) && !defined(PURPLE_COMPILATION)
# error "only <pidgin.h> may be included directly"
#endif

#ifndef PURPLE_UI_H
#define PURPLE_UI_H

#include <glib.h>
#include <glib-object.h>

G_BEGIN_DECLS

#define PURPLE_TYPE_UI (purple_ui_get_type())
G_DECLARE_DERIVABLE_TYPE(PurpleUi, purple_ui, PURPLE, UI, GObject)

/**
 * PurpleUi:
 *
 * An abstract class representing a user interface. All user interfaces must
 * create a subclass of this and pass it to [func@Purple.Core.init].
 *
 * Since: 3.0.0
 */

/**
 * PurpleUiClass:
 * @prefs_init: This function is called to initialize the ui's preferences.
 *              This is slowly being phased out for @get_settings_backend, but
 *              is still required.
 * @start: Called when libpurple is done with its initialization when the user
 *         interface should start telling libpurple about the rest of the user
 *         interface's interfaces.
 * @stop: Called after most of libpurple has been uninitialized.
 * @get_settings_backend: Called to get the [class@Gio.SettingsBackend] that
 *                        the UI is using.
 *
 * The base class for all user interfaces which is used to identify themselves
 * to libpurple when calling [func@Purple.Core.init].
 *
 * Since: 3.0.0
 */
struct _PurpleUiClass {
	/*< private >*/
	GObjectClass parent;

	/*< public >*/
	void (*prefs_init)(PurpleUi *ui);
	gboolean (*start)(PurpleUi *ui, GError **error);
	void (*stop)(PurpleUi *ui);

	gpointer (*get_settings_backend)(PurpleUi *ui);

	/*< private >*/
	gpointer reserved[4];
};

/**
 * purple_ui_get_id:
 * @ui: The instance.
 *
 * Gets the id for the user interface.
 *
 * Returns: id of the user interface.
 *
 * Since: 3.0.0
 */
const char *purple_ui_get_id(PurpleUi *ui);

/**
 * purple_ui_get_name:
 * @ui: The instance.
 *
 * Gets the name of @ui. This should be translated.
 *
 * Returns: The name of the user interface.
 *
 * Since: 3.0.0
 */
const char *purple_ui_get_name(PurpleUi *ui);

/**
 * purple_ui_get_version:
 * @ui: The instance.
 *
 * Gets the version of @ui.
 *
 * Returns: The version of the user interface.
 *
 * Since: 3.0.0
 */
const char *purple_ui_get_version(PurpleUi *ui);

/**
 * purple_ui_get_website:
 * @ui: The instance.
 *
 * Gets the website from @ui.
 *
 * Returns: (nullable): The website URI of the user interface or %NULL.
 *
 * Since: 3.0.0
 */
const char *purple_ui_get_website(PurpleUi *ui);

/**
 * purple_ui_get_support_website:
 * @ui: The instance.
 *
 * Gets the support website from @ui.
 *
 * Returns: (nullable): The support website URI of the user interface or %NULL.
 *
 * Since: 3.0.0
 */
const char *purple_ui_get_support_website(PurpleUi *ui);

/**
 * purple_ui_get_client_type:
 * @ui: The instance.
 *
 * Gets the client type from @ui.
 *
 * Returns: (transfer none): The client type of the user interface.
 *
 * Since: 3.0.0
 */
const char *purple_ui_get_client_type(PurpleUi *ui);

/**
 * purple_ui_prefs_init:
 * @ui: The instance.
 *
 * Tells @ui that it should be initializing its preferences.
 *
 * Note: This should only be called by libpurple.
 *
 * Since: 3.0.0
 */
void purple_ui_prefs_init(PurpleUi *ui);

/**
 * purple_ui_start:
 * @ui: The instance.
 * @error: Return address for a #GError, or %NULL.
 *
 * Tells @ui that libpurple is done initializing and that @ui should continue
 * its initialization.
 *
 * The user interface can return errors here which will be propagated by
 * [func@Purple.Core.init] which calls this function.
 *
 * Note: This should only be called by libpurple.
 *
 * Returns: %TRUE if successful, otherwise %FALSE with @error optionally set.
 *
 * Since: 3.0.0
 */
gboolean purple_ui_start(PurpleUi *ui, GError **error);

/**
 * purple_ui_stop:
 * @ui: The instance.
 *
 * Tells @ui that libpurple is done shutting down.
 *
 * Note: This should only be called by libpurple.
 *
 * Since: 3.0.0
 */
void purple_ui_stop(PurpleUi *ui);

/**
 * purple_ui_get_settings_backend:
 * @ui: The instance:
 *
 * Get the [class@Gio.SettingsBackend] that @ui is using for its settings.
 *
 * Note: This should only be called by libpurple.
 *
 * Returns: (transfer full): The settings that @ui is using.
 *
 * Since: 3.0.0
 */
gpointer purple_ui_get_settings_backend(PurpleUi *ui);


G_END_DECLS

#endif /* PURPLE_UI_H */