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/*
 * Purple - Internet Messaging Library
 * Copyright (C) Pidgin Developers <devel@pidgin.im>
 *
 * This library 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; 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, see <https://www.gnu.org/licenses/>.
 */

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

#ifndef PURPLE_CONVERSATION_H
#define PURPLE_CONVERSATION_H

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

#define PURPLE_TYPE_CONVERSATION (purple_conversation_get_type())
G_DECLARE_DERIVABLE_TYPE(PurpleConversation, purple_conversation, PURPLE,
                         CONVERSATION, GObject)

#include <purplecontactinfo.h>
#include <purpleconversationmember.h>
#include <purplemessage.h>

/**
 * PurpleConversationUpdateType:
 * @PURPLE_CONVERSATION_UPDATE_ADD: The buddy associated with the conversation
 *                                  was added.
 * @PURPLE_CONVERSATION_UPDATE_REMOVE: The buddy associated with the
 *                                     conversation was removed.
 * @PURPLE_CONVERSATION_UPDATE_ACCOUNT: The purple_account was changed.
 * @PURPLE_CONVERSATION_UPDATE_TYPING: The typing state was updated.
 * @PURPLE_CONVERSATION_UPDATE_UNSEEN: The unseen state was updated.
 * @PURPLE_CONVERSATION_UPDATE_LOGGING: Logging for this conversation was
 *                                      enabled or disabled.
 * @PURPLE_CONVERSATION_UPDATE_TOPIC: The topic for a chat was updated.
 * @PURPLE_CONVERSATION_ACCOUNT_ONLINE: One of the user's accounts went online.
 * @PURPLE_CONVERSATION_ACCOUNT_OFFLINE: One of the user's accounts went
 *                                       offline.
 * @PURPLE_CONVERSATION_UPDATE_AWAY: The other user went away.
 * @PURPLE_CONVERSATION_UPDATE_ICON: The other user's buddy icon changed.
 * @PURPLE_CONVERSATION_UPDATE_NAME: The name of the conversation was changed.
 * @PURPLE_CONVERSATION_UPDATE_TITLE: The title of the conversation was
 *                                    updated.
 * @PURPLE_CONVERSATION_UPDATE_CHATLEFT: The user left a chat.
 * @PURPLE_CONVERSATION_UPDATE_FEATURES: The features for a chat have changed.
 *
 * Conversation update type.
 */
typedef enum
{
	PURPLE_CONVERSATION_UPDATE_ADD = 0,
	PURPLE_CONVERSATION_UPDATE_REMOVE,
	PURPLE_CONVERSATION_UPDATE_ACCOUNT,
	PURPLE_CONVERSATION_UPDATE_TYPING,
	PURPLE_CONVERSATION_UPDATE_UNSEEN,
	PURPLE_CONVERSATION_UPDATE_LOGGING,
	PURPLE_CONVERSATION_UPDATE_TOPIC,

	/*
	 * XXX These need to go when we implement a more generic core/UI event
	 * system.
	 */
	PURPLE_CONVERSATION_ACCOUNT_ONLINE,
	PURPLE_CONVERSATION_ACCOUNT_OFFLINE,
	PURPLE_CONVERSATION_UPDATE_AWAY,
	PURPLE_CONVERSATION_UPDATE_ICON,
	PURPLE_CONVERSATION_UPDATE_NAME,
	PURPLE_CONVERSATION_UPDATE_TITLE,
	PURPLE_CONVERSATION_UPDATE_CHATLEFT,

	PURPLE_CONVERSATION_UPDATE_FEATURES

} PurpleConversationUpdateType;

/**
 * PurpleConversation:
 *
 * A core representation of a conversation between two or more people.
 *
 * The conversation can be an IM or a chat.
 *
 * Note: When a conversation is destroyed with the last g_object_unref(), the
 *       specified conversation is removed from the parent window. If this
 *       conversation is the only one contained in the parent window, that
 *       window is also destroyed.
 */

/**
 * PurpleConversationClass:
 * @write_message: Writes a message to a chat or IM conversation. See
 *                 purple_conversation_write_message().
 *
 * Base class for all #PurpleConversation's
 */
struct _PurpleConversationClass {
	/*< private >*/
	GObjectClass parent_class;

	/*< public >*/
	void (*write_message)(PurpleConversation *conv, PurpleMessage *msg);

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

#include <purpleconversationuiops.h>
#include "account.h"
#include "buddyicon.h"

G_BEGIN_DECLS

/**
 * purple_conversation_present:
 * @conv: The conversation to present
 *
 * Present a conversation to the user. This allows core code to initiate a
 * conversation by displaying the IM dialog.
 */
void purple_conversation_present(PurpleConversation *conv);

/**
 * purple_conversation_set_ui_ops:
 * @conv: The conversation.
 * @ops:  The UI conversation operations structure.
 *
 * Sets the specified conversation's UI operations structure.
 */
void purple_conversation_set_ui_ops(PurpleConversation *conv, PurpleConversationUiOps *ops);

/**
 * purple_conversation_get_ui_ops:
 * @conv: The conversation.
 *
 * Returns the specified conversation's UI operations structure.
 *
 * Returns: The operations structure.
 */
PurpleConversationUiOps *purple_conversation_get_ui_ops(PurpleConversation *conv);

/**
 * purple_conversation_set_account:
 * @conv: The conversation.
 * @account: The purple_account.
 *
 * Sets the specified conversation's purple_account.
 *
 * This purple_account represents the user using purple, not the person the user
 * is having a conversation/chat/flame with.
 */
void purple_conversation_set_account(PurpleConversation *conv, PurpleAccount *account);

/**
 * purple_conversation_get_account:
 * @conv: The conversation.
 *
 * Returns the specified conversation's purple_account.
 *
 * This purple_account represents the user using purple, not the person the user
 * is having a conversation/chat/flame with.
 *
 * Returns: (transfer none): The conversation's purple_account.
 */
PurpleAccount *purple_conversation_get_account(PurpleConversation *conv);

/**
 * purple_conversation_get_connection:
 * @conv: The conversation.
 *
 * Returns the specified conversation's purple_connection.
 *
 * Returns: (transfer none): The conversation's purple_connection.
 */
PurpleConnection *purple_conversation_get_connection(PurpleConversation *conv);

/**
 * purple_conversation_set_title:
 * @conv:  The conversation.
 * @title: The title.
 *
 * Sets the specified conversation's title.
 */
void purple_conversation_set_title(PurpleConversation *conv, const gchar *title);

/**
 * purple_conversation_get_title:
 * @conv: The conversation.
 *
 * Returns the specified conversation's title.
 *
 * Returns: The title.
 */
const char *purple_conversation_get_title(PurpleConversation *conv);

/**
 * purple_conversation_autoset_title:
 * @conv: The conversation.
 *
 * Automatically sets the specified conversation's title.
 *
 * This function takes OPT_IM_ALIAS_TAB into account, as well as the
 * user's alias.
 */
void purple_conversation_autoset_title(PurpleConversation *conv);

/**
 * purple_conversation_set_name:
 * @conv: The conversation.
 * @name: The conversation's name.
 *
 * Sets the specified conversation's name.
 */
void purple_conversation_set_name(PurpleConversation *conv, const gchar *name);

/**
 * purple_conversation_get_name:
 * @conv: The conversation.
 *
 * Returns the specified conversation's name.
 *
 * Returns: The conversation's name. If the conversation is an IM with a
 *          PurpleBuddy, then it's the name of the PurpleBuddy.
 */
const char *purple_conversation_get_name(PurpleConversation *conv);

/**
 * purple_conversation_write_message:
 * @conv: The conversation.
 * @msg:  The message to write.
 *
 * Writes to a chat or an IM.
 */
void purple_conversation_write_message(PurpleConversation *conv, PurpleMessage *msg);

/**
 * purple_conversation_write_system_message:
 * @conv:    The conversation.
 * @message: The message to write.
 * @flags:   The message flags (you don't need to set %PURPLE_MESSAGE_SYSTEM.
 *
 * Wites a system message to a chat or an IM.
 */
void purple_conversation_write_system_message(PurpleConversation *conv, const gchar *message, PurpleMessageFlags flags);

/**
 * purple_conversation_send:
 * @conv:    The conversation.
 * @message: The message to send.
 *
 * Sends a message to this conversation. This function calls
 * purple_conversation_send_with_flags() with no additional flags.
 */
void purple_conversation_send(PurpleConversation *conv, const gchar *message);

/**
 * purple_conversation_send_with_flags:
 * @conv:    The conversation.
 * @message: The message to send.
 * @flags:   The PurpleMessageFlags flags to use in addition to
 *           PURPLE_MESSAGE_SEND.
 *
 * Sends a message to this conversation with specified flags.
 */
void purple_conversation_send_with_flags(PurpleConversation *conv, const gchar *message, PurpleMessageFlags flags);

/**
 * purple_conversation_set_features:
 * @conv:      The conversation
 * @features:  Bitset defining supported features
 *
 * Set the features as supported for the given conversation.
 */
void purple_conversation_set_features(PurpleConversation *conv, PurpleConnectionFlags features);

/**
 * purple_conversation_get_features:
 * @conv:  The conversation
 *
 * Get the features supported by the given conversation.
 */
PurpleConnectionFlags purple_conversation_get_features(PurpleConversation *conv);

/**
 * purple_conversation_has_focus:
 * @conv:    The conversation.
 *
 * Determines if a conversation has focus
 *
 * Returns: %TRUE if the conversation has focus, %FALSE if
 * it does not or the UI does not have a concept of conversation focus
 */
gboolean purple_conversation_has_focus(PurpleConversation *conv);

/**
 * purple_conversation_update:
 * @conv: The conversation.
 * @type: The update type.
 *
 * Updates the visual status and UI of a conversation.
 */
void purple_conversation_update(PurpleConversation *conv, PurpleConversationUpdateType type);

/**
 * purple_conversation_send_confirm:
 * @conv:    The conversation.
 * @message: The message to send.
 *
 * Sends a message to a conversation after confirming with
 * the user.
 *
 * This function is intended for use in cases where the user
 * hasn't explicitly and knowingly caused a message to be sent.
 * The confirmation ensures that the user isn't sending a
 * message by mistake.
 */
void purple_conversation_send_confirm(PurpleConversation *conv, const gchar *message);

/**
 * purple_conversation_get_extended_menu:
 * @conv: The conversation.
 *
 * Retrieves the extended menu items for the conversation.
 *
 * Returns: (element-type PurpleActionMenu) (transfer full): The extended menu
 *          items for a conversation, as harvested by the chat-extended-menu
 *          signal.
 */
GList * purple_conversation_get_extended_menu(PurpleConversation *conv);

/**
 * purple_conversation_present_error:
 * @who:     The user this error is about
 * @account: The account this error is on
 * @what:    The error
 *
 * Presents an IM-error to the user
 *
 * This is a helper function to find a conversation, write an error to it, and
 * raise the window.  If a conversation with this user doesn't already exist,
 * the function will return FALSE and the calling function can attempt to present
 * the error another way (purple_notify_error, most likely)
 *
 * Returns:        TRUE if the error was presented, else FALSE
 */
gboolean purple_conversation_present_error(const gchar *who, PurpleAccount *account, const gchar *what);

/**
 * purple_conversation_get_members:
 * @conversation: The instance.
 *
 * Gets the members that are in @conversation.
 *
 * Returns: (transfer none): The members in @conversation.
 *
 * Since: 3.0.0
 */
GListModel *purple_conversation_get_members(PurpleConversation *conversation);

/**
 * purple_conversation_has_member:
 * @conversation: The instance.
 * @info: The [class@Purple.ContactInfo] to look for.
 * @position: (out) (optional): A return address for the position of the member
 *            in the collection.
 *
 * Checks if @info is in @conversation. If @info is found, @position is set to
 * the position of @info in [property@Purple.Conversation:members] if it is not
 * %NULL.
 *
 * Returns: %TRUE if @info is in @conversation otherwise %FALSE.
 *
 * Since: 3.0.0
 */
gboolean purple_conversation_has_member(PurpleConversation *conversation, PurpleContactInfo *info, guint *position);

/**
 * purple_conversation_find_member:
 * @conversation: The instance.
 * @info: A [class@Purple.ContactInfo instance]
 *
 * Finds the [class@Purple.ConversationMember] for @info if they are a member
 * of @conversation.
 *
 * Returns: (transfer none) (nullable): The [class@Purple.ConversationMember]
 *          if found or %NULL.
 *
 * Since: 3.0.0
 */
PurpleConversationMember *purple_conversation_find_member(PurpleConversation *conversation, PurpleContactInfo *info);

/**
 * purple_conversation_add_member:
 * @conversation: The instance.
 * @info: The [class@Purple.ContactInfo] of the person joining.
 * @announce: Whether this addition should be announced or not.
 * @message: (nullable): An optional message to be used with @announce.
 *
 * Looks for an existing [class@Purple.ConversationMember] for @info in
 * @conversation and returns it if found. If not, a new
 * [class@Purple.ConversationMember] is created.
 *
 * > This method is intended to be called by a protocol plugin to directly
 * > manage the membership state of the @conversation.
 *
 * This will also emit the [signal@Purple.Conversation::member-added] signal if
 * an existing member was not found.
 *
 * The @announce and @message parameters will be used when emitting the
 * [signal@Purple.Conversation::member-added] signal. Announce and message are
 * meant for protocols to more properly define their behavior. For example, on
 * IRC you will typically be told when a user joins a chat but on Twitch this
 * isn't announced.
 *
 * Returns: (transfer none): The [class@Purple.ConversationMember] that was
 *          created or found.
 *
 * Since: 3.0.0
 */
PurpleConversationMember *purple_conversation_add_member(PurpleConversation *conversation, PurpleContactInfo *info, gboolean announce, const char *message);

/**
 * purple_conversation_remove_member:
 * @conversation: The instance.
 * @member: The [class@Purple.ConversationMember] to remove.
 * @announce: Whether or not this removal should be announced.
 * @message: (nullable): An optional message for the announcement.
 *
 * Attempts to remove @member from the collection of members in @conversation.
 * If found, @member is removed and the
 * [signal@Purple.Conversation::member-removed] signal is emitted with
 * @announce and @message as parameters.
 *
 * > This method is intended to be called by a protocol plugin to directly
 * > manage the membership state of the @conversation.
 *
 * Returns: %TRUE if @member was found and removed from @conversation,
 *          otherwise %FALSE.
 *
 * Since: 3.0.0
 */
gboolean purple_conversation_remove_member(PurpleConversation *conversation, PurpleConversationMember *member, gboolean announce, const char *message);

G_END_DECLS

#endif /* PURPLE_CONVERSATION_H */