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/*
 * Purple - Internet Messaging Library
 * Copyright (C) Pidgin Developers <devel@pidgin.im>
 *
 * Purple is the legal property of its developers, whose names are too numerous
 * to list here.  Please refer to the COPYRIGHT file distributed with this
 * source distribution.
 *
 * This library 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 library 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 library; if not, see <https://www.gnu.org/licenses/>.
 */

#if !defined(PURPLE_IRCV3_GLOBAL_HEADER_INSIDE) && \
    !defined(PURPLE_IRCV3_COMPILATION)
# error "only <libpurple/protocols/ircv3.h> may be included directly"
#endif

#ifndef PURPLE_IRCV3_CAPABILITIES_H
#define PURPLE_IRCV3_CAPABILITIES_H

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

#include <gplugin.h>
#include <gplugin-native.h>

#include <purple.h>

#include "purpleircv3version.h"

G_BEGIN_DECLS

/* https://ircv3.net/specs/extensions/capability-negotiation */
#define PURPLE_IRCV3_CAPABILITY_CAP_LS_VERSION "302"

/* https://ircv3.net/specs/extensions/sasl-3.2 */
#define PURPLE_IRCV3_CAPABILITY_SASL "sasl"

/* https://ircv3.net/specs/extensions/server-time */
#define PURPLE_IRCV3_CAPABILITY_SERVER_TIME "server-time"

#define PURPLE_IRCV3_TYPE_CAPABILITIES (purple_ircv3_capabilities_get_type())

PURPLE_IRCV3_AVAILABLE_IN_ALL
G_DECLARE_FINAL_TYPE(PurpleIRCv3Capabilities, purple_ircv3_capabilities,
                     PURPLE_IRCV3, CAPABILITIES, GObject)

#include "purpleircv3connection.h"
#include "purpleircv3message.h"

/**
 * purple_ircv3_capabilities_register: (skip)
 * @plugin: The [class@GPlugin.NativePlugin] instance.
 *
 * Dynamically registers the PurpleIRCv3Capabilities type.
 *
 * Since: 3.0
 */
G_GNUC_INTERNAL void purple_ircv3_capabilities_register(GPluginNativePlugin *plugin);

G_GNUC_INTERNAL PurpleIRCv3Capabilities *purple_ircv3_capabilities_new(PurpleIRCv3Connection *connection);

G_GNUC_INTERNAL void purple_ircv3_capabilities_start(PurpleIRCv3Capabilities *capabilities);

G_GNUC_INTERNAL gboolean purple_ircv3_capabilities_message_handler(PurpleIRCv3Message *message, GError **error, gpointer data);

/**
 * purple_ircv3_capabilities_get_connection:
 * @capabilities: The instance.
 *
 * Gets the PurpleIRCv3Connection object that @capabilities was created with.
 *
 * Returns: (transfer none): The connection instance.
 *
 * Since: 3.0
 */
PURPLE_IRCV3_AVAILABLE_IN_ALL
PurpleIRCv3Connection *purple_ircv3_capabilities_get_connection(PurpleIRCv3Capabilities *capabilities);

/**
 * purple_ircv3_capabilities_request:
 * @capabilities: The instance.
 * @capability: The capabilities to request.
 *
 * This method will send `CAP REQ @capability` to the server. Listen to the
 * `::ack` and `::nak` signals which will contain the contents of @capability
 * that was passed in here.
 *
 * Since: 3.0
 */
PURPLE_IRCV3_AVAILABLE_IN_ALL
void purple_ircv3_capabilities_request(PurpleIRCv3Capabilities *capabilities, const char *capability);

/**
 * purple_ircv3_capabilities_lookup:
 * @capabilities: The instance.
 * @name: The name of the capability to look for.
 * @found: (out) (nullable): A return address for a boolean on whether the
 *         capability was advertised or not.
 *
 * Gets the value that the @name capability provided if it was advertised. To
 * determine if the capability was advertised use the @found parameter.
 *
 * Returns: The value of the capability named @name.
 *
 * Since: 3.0
 */
PURPLE_IRCV3_AVAILABLE_IN_ALL
const char *purple_ircv3_capabilities_lookup(PurpleIRCv3Capabilities *capabilities, const char *name, gboolean *found);

/**
 * purple_ircv3_capabilities_lookup_and_request:
 * @capabilities: The instance.
 * @name: The name of the capability to look for.
 *
 * A helper function to call [method@PurpleIRCv3.Capabilities.Lookup] and if
 * found, call [method@PurpleIRCv3.Capabilities.Request].
 *
 * This method ignores the advertised value, so to get that you'll need to call
 * [method@PurpleIRCv3.Capabilities.Lookup] yourself.
 *
 * Also if you need to do something when the server ACK's or NAK's your
 * request, you're probably better off just using the methods yourself.
 *
 * Returns: %TRUE if @name was found and requested, %FALSE otherwise.
 *
 * Since: 3.0
 */
PURPLE_IRCV3_AVAILABLE_IN_ALL
gboolean purple_ircv3_capabilities_lookup_and_request(PurpleIRCv3Capabilities *capabilities, const char *name);

/**
 * purple_ircv3_capabilties_add_wait:
 * @capabilities: The instance.
 *
 * Adds a wait counter to @capabilities. This counter is used to delay the
 * call of `CAP END` until all capability negotiation has completed. This is
 * necessary for SASL and may be necessary for other capabilities as well.
 *
 * Since: 3.0
 */
PURPLE_IRCV3_AVAILABLE_IN_ALL
void purple_ircv3_capabilities_add_wait(PurpleIRCv3Capabilities *capabilities);

/**
 * purple_ircv3_capabilties_remove_wait:
 * @capabilities: The instance.
 *
 * Removes a wait counter from @capabilities. Only when this counter reaches 0,
 * will `CAP END` be called and registration completed.
 *
 * This is necessary for SASL and may be necessary for other capabilities as
 * well.
 *
 * Since: 3.0
 */
PURPLE_IRCV3_AVAILABLE_IN_ALL
void purple_ircv3_capabilities_remove_wait(PurpleIRCv3Capabilities *capabilities);

G_END_DECLS

#endif /* PURPLE_IRCV3_CAPABILITIES_H */