libpurple/conversation.h

/* purple
 *
 * 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 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, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02111-1301  USA
 */

#ifndef _PURPLE_CONVERSATION_H_
#define _PURPLE_CONVERSATION_H_
/**
 * SECTION:conversation
 * @section_id: libpurple-conversation
 * @short_description: Conversation base class <filename>conversation.h</filename>
 * @title: Conversation Base Class
 *
 * This is the base class for the conversation abstraction on Libpurple.
 *
 * The present API manages the common functionallity for both kinds of conversations
 * @PurpleIMConversation and @PurpleChatConversation.
 */

#define PURPLE_TYPE_CONVERSATION             (purple_conversation_get_type())
#define PURPLE_CONVERSATION(obj)             (G_TYPE_CHECK_INSTANCE_CAST((obj), PURPLE_TYPE_CONVERSATION, PurpleConversation))
#define PURPLE_CONVERSATION_CLASS(klass)     (G_TYPE_CHECK_CLASS_CAST((klass), PURPLE_TYPE_CONVERSATION, PurpleConversationClass))
#define PURPLE_IS_CONVERSATION(obj)          (G_TYPE_CHECK_INSTANCE_TYPE((obj), PURPLE_TYPE_CONVERSATION))
#define PURPLE_IS_CONVERSATION_CLASS(klass)  (G_TYPE_CHECK_CLASS_TYPE((klass), PURPLE_TYPE_CONVERSATION))
#define PURPLE_CONVERSATION_GET_CLASS(obj)   (G_TYPE_INSTANCE_GET_CLASS((obj), PURPLE_TYPE_CONVERSATION, PurpleConversationClass))

#define PURPLE_TYPE_CONVERSATION_UI_OPS      (purple_conversation_ui_ops_get_type())

#define PURPLE_TYPE_CONVERSATION_MESSAGE     (purple_conversation_message_get_type())

/**************************************************************************/
/* Data Structures                                                        */
/**************************************************************************/

typedef struct _PurpleConversation           PurpleConversation;
typedef struct _PurpleConversationClass      PurpleConversationClass;

typedef struct _PurpleConversationUiOps      PurpleConversationUiOps;

/**
 * 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_UPDATE_E2EE:     The End-to-end encryption state 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,
	PURPLE_CONVERSATION_UPDATE_E2EE,

	/*
	 * 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;

/**
 * PurpleMessageFlags:
 * @PURPLE_MESSAGE_SEND:        Outgoing message.
 * @PURPLE_MESSAGE_RECV:        Incoming message.
 * @PURPLE_MESSAGE_SYSTEM:      System message.
 * @PURPLE_MESSAGE_AUTO_RESP:   Auto response.
 * @PURPLE_MESSAGE_ACTIVE_ONLY: Hint to the UI that this message should not be
 *                              shown in conversations which are only open for
 *                              internal UI purposes (e.g. for contact-aware
 *                              conversations).
 * @PURPLE_MESSAGE_NICK:        Contains your nick.
 * @PURPLE_MESSAGE_NO_LOG:      Do not log.
 * @PURPLE_MESSAGE_ERROR:       Error message.
 * @PURPLE_MESSAGE_DELAYED:     Delayed message.
 * @PURPLE_MESSAGE_RAW:         "Raw" message - don't apply formatting
 * @PURPLE_MESSAGE_IMAGES:      Message contains images
 * @PURPLE_MESSAGE_NOTIFY:      Message is a notification
 * @PURPLE_MESSAGE_NO_LINKIFY:  Message should not be auto-linkified
 * @PURPLE_MESSAGE_INVISIBLE:   Message should not be displayed
 *
 * Flags applicable to a message. Most will have send, recv or system.
 */
typedef enum /*< flags >*/
{
	PURPLE_MESSAGE_SEND        = 0x0001,
	PURPLE_MESSAGE_RECV        = 0x0002,
	PURPLE_MESSAGE_SYSTEM      = 0x0004,
	PURPLE_MESSAGE_AUTO_RESP   = 0x0008,
	PURPLE_MESSAGE_ACTIVE_ONLY = 0x0010,
	PURPLE_MESSAGE_NICK        = 0x0020,
	PURPLE_MESSAGE_NO_LOG      = 0x0040,
	PURPLE_MESSAGE_ERROR       = 0x0200,
	PURPLE_MESSAGE_DELAYED     = 0x0400,
	PURPLE_MESSAGE_RAW         = 0x0800,
	PURPLE_MESSAGE_IMAGES      = 0x1000,
	PURPLE_MESSAGE_NOTIFY      = 0x2000,
	PURPLE_MESSAGE_NO_LINKIFY  = 0x4000,
	PURPLE_MESSAGE_INVISIBLE   = 0x8000
} PurpleMessageFlags;

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

/**************************************************************************/
/* PurpleConversation                                                     */
/**************************************************************************/
/**
 * PurpleConversation:
 * @ui_data: The UI data associated with this conversation. This is a
 *           convenience field provided to the UIs -- it is not used by the
 *           libpurple core.
 *
 * 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.
 */
struct _PurpleConversation
{
	GObject gparent;

	/*< public >*/
	gpointer ui_data;
};

/**
 * 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 {
	GObjectClass parent_class;

	void (*write_message)(PurpleConversation *conv, PurpleMessage *msg);

	/*< private >*/
	void (*_purple_reserved1)(void);
	void (*_purple_reserved2)(void);
	void (*_purple_reserved3)(void);
	void (*_purple_reserved4)(void);
};

#include "account.h"
#include "buddyicon.h"
#include "e2ee.h"
#include "log.h"
#include "smiley-list.h"

/**************************************************************************/
/* PurpleConversationUiOps                                                */
/**************************************************************************/
/**
 * PurpleConversationUiOps:
 * @create_conversation: Called when @conv is created (but before the
 *   <link linkend="conversations-conversation-created"><literal>"conversation-created"</literal></link>
 *                       signal is emitted).
 * @destroy_conversation: Called just before @conv is freed.
 * @write_chat: Write a message to a chat. If this field is %NULL, libpurple
 *              will fall back to using @write_conv.
 *              See purple_conversation_write_message().
 * @write_im: Write a message to an IM conversation. If this field is %NULL,
 *            libpurple will fall back to using @write_conv.
 *            See purple_conversation_write_message().
 * @write_conv: Write a message to a conversation. This is used rather than the
 *              chat- or im-specific ops for errors, system messages (such as "x
 *              is now know as y"), and as the fallback if @write_im and
 *              @write_chat are not implemented. It should be implemented, or
 *              the UI will miss conversation error messages and your users will
 *              hate you. See purple_conversation_write_message().
 * @chat_add_users: Add @cbuddies to a chat.
 *                  <sbr/>@cbuddies:     A GList of #PurpleChatUser structs.
 *                  <sbr/>@new_arrivals: Whether join notices should be shown.
 *                                       (Join notices are actually written to
 *                                       the conversation by
 *                                       purple_chat_conversation_add_users())
 * @chat_rename_user: Rename the user in this chat named @old_name to @new_name.
 *                    (The rename message is written to the conversation by
 *                    libpurple.) See purple_chat_conversation_rename_user().
 *                    <sbr/>@new_alias: @new_name's new alias, if they have one.
 * @chat_remove_users: Remove @users from a chat @chat.
 *                     See purple_chat_conversation_remove_users().
 * @chat_update_user: Called when a user's flags are changed.
 *                    See purple_chat_user_set_flags().
 * @present: Present this conversation to the user; for example, by displaying
 *           the IM dialog.
 * @has_focus: If this UI has a concept of focus (as in a windowing system) and
 *             this conversation has the focus, return %TRUE; otherwise, return
 *             %FALSE.
 * @send_confirm: Prompt the user for confirmation to send @message. This
 *                function should arrange for the message to be sent if the user
 *                accepts. If this field is %NULL, libpurple will fall back to
 *                using purple_request_action().
 *
 * Conversation operations and events.
 *
 * Any UI representing a conversation must assign a filled-out
 * #PurpleConversationUiOps structure to the #PurpleConversation.
 */
struct _PurpleConversationUiOps
{
	void (*create_conversation)(PurpleConversation *conv);
	void (*destroy_conversation)(PurpleConversation *conv);

	void (*write_chat)(PurpleChatConversation *chat, PurpleMessage *msg);
	void (*write_im)(PurpleIMConversation *im, PurpleMessage *msg);
	void (*write_conv)(PurpleConversation *conv, PurpleMessage *msg);

	void (*chat_add_users)(PurpleChatConversation *chat,
	                       GList *cbuddies,
	                       gboolean new_arrivals);

	void (*chat_rename_user)(PurpleChatConversation *chat, const char *old_name,
	                         const char *new_name, const char *new_alias);

	void (*chat_remove_users)(PurpleChatConversation *chat, GList *users);

	void (*chat_update_user)(PurpleChatUser *cb);

	void (*present)(PurpleConversation *conv);
	gboolean (*has_focus)(PurpleConversation *conv);

	void (*send_confirm)(PurpleConversation *conv, const char *message);

	/*< private >*/
	void (*_purple_reserved1)(void);
	void (*_purple_reserved2)(void);
	void (*_purple_reserved3)(void);
	void (*_purple_reserved4)(void);
};

G_BEGIN_DECLS

/**************************************************************************/
/* Conversation API                                                       */
/**************************************************************************/

/**
 * purple_conversation_get_type:
 *
 * Returns: The #GType for the Conversation object.
 */
GType purple_conversation_get_type(void);

/**
 * purple_conversation_ui_ops_get_type:
 *
 * Returns: The #GType for the #PurpleConversationUiOps boxed structure.
 */
GType purple_conversation_ui_ops_get_type(void);

/**
 * 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(const 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(const 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(const 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 char *title);

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

/**
 * purple_conversation_set_e2ee_state:
 * @conv:  The conversation.
 * @state: The E2EE state.
 *
 * Sets current E2EE state for the conversation.
 */
void
purple_conversation_set_e2ee_state(PurpleConversation *conv,
	PurpleE2eeState *state);

/**
 * purple_conversation_get_e2ee_state:
 * @conv: The conversation.
 *
 * Gets current conversation's E2EE state.
 *
 * Returns: Current E2EE state for conversation.
 */
PurpleE2eeState *
purple_conversation_get_e2ee_state(PurpleConversation *conv);

/**
 * purple_conversation_set_logging:
 * @conv: The conversation.
 * @log:  %TRUE if logging should be enabled, or %FALSE otherwise.
 *
 * Enables or disables logging for this conversation.
 */
void purple_conversation_set_logging(PurpleConversation *conv, gboolean log);

/**
 * purple_conversation_is_logging:
 * @conv: The conversation.
 *
 * Returns whether or not logging is enabled for this conversation.
 *
 * Returns: %TRUE if logging is enabled, or %FALSE otherwise.
 */
gboolean purple_conversation_is_logging(const PurpleConversation *conv);

/**
 * purple_conversation_close_logs:
 * @conv: The conversation.
 *
 * Closes any open logs for this conversation.
 *
 * Note that new logs will be opened as necessary (e.g. upon receipt of a
 * message, if the conversation has logging enabled. To disable logging for
 * the remainder of the conversation, use purple_conversation_set_logging().
 */
void purple_conversation_close_logs(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 char *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 char *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_get_message_history:
 * @conv:   The conversation
 *
 * Retrieve the message history of a conversation.
 *
 * Returns: (element-type PurpleMessage) (transfer none):
 *          A GList of PurpleMessage's. You must not modify the
 *          list or the data within. The list contains the newest message at
 *          the beginning, and the oldest message at the end.
 */
GList *purple_conversation_get_message_history(PurpleConversation *conv);

/**
 * purple_conversation_clear_message_history:
 * @conv:  The conversation
 *
 * Clear the message history of a conversation.
 */
void purple_conversation_clear_message_history(PurpleConversation *conv);

/**
 * purple_conversation_set_ui_data:
 * @conv:			The conversation.
 * @ui_data:		A pointer to associate with this conversation.
 *
 * Set the UI data associated with this conversation.
 */
void purple_conversation_set_ui_data(PurpleConversation *conv, gpointer ui_data);

/**
 * purple_conversation_get_ui_data:
 * @conv:			The conversation.
 *
 * Get the UI data associated with this conversation.
 *
 * Returns: (transfer none): The UI data associated with this conversation.
 *         This is a convenience field provided to the UIs--it is not
 *         used by the libpurple core.
 */
gpointer purple_conversation_get_ui_data(const PurpleConversation *conv);

/**
 * 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 char *message);

/**
 * purple_conversation_get_extended_menu:
 * @conv: The conversation.
 *
 * Retrieves the extended menu items for the conversation.
 *
 * Returns: (element-type PurpleMenuAction):
 *          A list of PurpleMenuAction items, harvested by the
 *          chat-extended-menu signal. The list and the menuaction
 *          items should be freed by the caller.
 */
GList * purple_conversation_get_extended_menu(PurpleConversation *conv);

/**
 * purple_conversation_do_command:
 * @conv:    The conversation.
 * @cmdline: The entire command including the arguments.
 * @markup:  %NULL, or the formatted command line.
 * @error:   If the command failed errormsg is filled in with the appropriate error
 *                message, if not %NULL. It must be freed by the caller with g_free().
 *
 * Perform a command in a conversation. Similar to purple_cmd_do_command().
 *
 * Returns:  %TRUE if the command was executed successfully, %FALSE otherwise.
 */
gboolean purple_conversation_do_command(PurpleConversation *conv,
		const gchar *cmdline, const gchar *markup, gchar **error);

/**
 * purple_conversation_get_max_message_size:
 * @conv: The conversation to query.
 *
 * Gets the maximum message size in bytes for the conversation.
 *
 * See #PurpleProtocolClientIface's <literal>get_max_message_size</literal>.
 *
 * Returns: Maximum message size, 0 if unspecified, -1 for infinite.
 */
gssize
purple_conversation_get_max_message_size(PurpleConversation *conv);

/**
 * purple_conversation_add_smiley:
 * @conv: The conversation that receives new smiley.
 * @smiley: The smiley.
 *
 * Adds a smiley to the list of smileys that belong to this conversation.
 */
void purple_conversation_add_smiley(PurpleConversation *conv, PurpleSmiley *smiley);

/**
 * purple_conversation_get_smiley:
 * @conv: The conversation.
 * @shortcut: The shortcut.
 *
 * Lookups for the smiley previously added to this conversation.
 *
 * Returns: (transfer none): The smiley, or %NULL if it doesn't exists.
 */
PurpleSmiley *purple_conversation_get_smiley(PurpleConversation *conv, const gchar *shortcut);

/**
 * purple_conversation_get_remote_smileys:
 * @conv: The conversation.
 *
 * Get all remote smileys previously added to this conversation.
 *
 * Returns: (transfer none): The list of remote smileys.
 */
PurpleSmileyList *
purple_conversation_get_remote_smileys(PurpleConversation *conv);

/**************************************************************************/
/* Conversation Helper API                                                */
/**************************************************************************/

/**
 * 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 char *who, PurpleAccount *account, const char *what);

G_END_DECLS

#endif /* _PURPLE_CONVERSATION_H_ */