home *** CD-ROM | disk | FTP | other *** search
- /**
- * @file log.h Logging API
- * @ingroup core
- *
- * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
- #ifndef _PURPLE_LOG_H_
- #define _PURPLE_LOG_H_
-
- #include <stdio.h>
-
-
- /********************************************************
- * DATA STRUCTURES **************************************
- ********************************************************/
-
- typedef struct _PurpleLog PurpleLog;
- typedef struct _PurpleLogLogger PurpleLogLogger;
- typedef struct _PurpleLogCommonLoggerData PurpleLogCommonLoggerData;
- typedef struct _PurpleLogSet PurpleLogSet;
-
- typedef enum {
- PURPLE_LOG_IM,
- PURPLE_LOG_CHAT,
- PURPLE_LOG_SYSTEM
- } PurpleLogType;
-
- typedef enum {
- PURPLE_LOG_READ_NO_NEWLINE = 1
- } PurpleLogReadFlags;
-
- #include "account.h"
- #include "conversation.h"
-
- typedef void (*PurpleLogSetCallback) (GHashTable *sets, PurpleLogSet *set);
-
- /**
- * A log logger.
- *
- * This struct gets filled out and is included in the PurpleLog. It contains everything
- * needed to write and read from logs.
- */
- struct _PurpleLogLogger {
- char *name; /**< The logger's name */
- char *id; /**< an identifier to refer to this logger */
-
- /** This gets called when the log is first created.
- I don't think this is actually needed. */
- void (*create)(PurpleLog *log);
-
- /** This is used to write to the log file */
- gsize (*write)(PurpleLog *log,
- PurpleMessageFlags type,
- const char *from,
- time_t time,
- const char *message);
-
- /** Called when the log is destroyed */
- void (*finalize)(PurpleLog *log);
-
- /** This function returns a sorted GList of available PurpleLogs */
- GList *(*list)(PurpleLogType type, const char *name, PurpleAccount *account);
-
- /** Given one of the logs returned by the logger's list function,
- * this returns the contents of the log in GtkIMHtml markup */
- char *(*read)(PurpleLog *log, PurpleLogReadFlags *flags);
-
- /** Given one of the logs returned by the logger's list function,
- * this returns the size of the log in bytes */
- int (*size)(PurpleLog *log);
-
- /** Returns the total size of all the logs. If this is undefined a default
- * implementation is used */
- int (*total_size)(PurpleLogType type, const char *name, PurpleAccount *account);
-
- /** This function returns a sorted GList of available system PurpleLogs */
- GList *(*list_syslog)(PurpleAccount *account);
-
- /** Adds PurpleLogSets to a GHashTable. By passing the data in the PurpleLogSets
- * to list, the caller can get every available PurpleLog from the logger.
- * Loggers using purple_log_common_writer() (or otherwise storing their
- * logs in the same directory structure as the stock loggers) do not
- * need to implement this function.
- *
- * Loggers which implement this function must create a PurpleLogSet,
- * then call @a cb with @a sets and the newly created PurpleLogSet. */
- void (*get_log_sets)(PurpleLogSetCallback cb, GHashTable *sets);
-
- /* Attempts to delete the specified log, indicating success or failure */
- gboolean (*remove)(PurpleLog *log);
-
- /* Tests whether a log is deletable */
- gboolean (*is_deletable)(PurpleLog *log);
-
- void (*_purple_reserved1)(void);
- void (*_purple_reserved2)(void);
- void (*_purple_reserved3)(void);
- void (*_purple_reserved4)(void);
- };
-
- /**
- * A log. Not the wooden type.
- */
- struct _PurpleLog {
- PurpleLogType type; /**< The type of log this is */
- char *name; /**< The name of this log */
- PurpleAccount *account; /**< The account this log is taking
- place on */
- PurpleConversation *conv; /**< The conversation being logged */
- time_t time; /**< The time this conversation
- started, converted to the local timezone */
-
- PurpleLogLogger *logger; /**< The logging mechanism this log
- is to use */
- void *logger_data; /**< Data used by the log logger */
- struct tm *tm; /**< The time this conversation
- started, saved with original
- timezone data, if available and
- if struct tm has the BSD
- timezone fields, else @c NULL.
- Do NOT modify anything in this struct.*/
-
- /* IMPORTANT: Some code in log.c allocates these without zeroing them.
- * IMPORTANT: Update that code if you add members here. */
- };
-
- /**
- * A common logger_data struct containing a file handle and path, as well
- * as a pointer to something else for additional data.
- */
- struct _PurpleLogCommonLoggerData {
- char *path;
- FILE *file;
- void *extra_data;
- };
-
- /**
- * Describes available logs.
- *
- * By passing the elements of this struct to purple_log_get_logs(), the caller
- * can get all available PurpleLogs.
- */
- struct _PurpleLogSet {
- PurpleLogType type; /**< The type of logs available */
- char *name; /**< The name of the logs available */
- PurpleAccount *account; /**< The account the available logs
- took place on. This will be
- @c NULL if the account no longer
- exists. (Depending on a
- logger's implementation of
- list, it may not be possible
- to load such logs.) */
- gboolean buddy; /**< Is this (account, name) a buddy
- on the buddy list? */
- char *normalized_name; /**< The normalized version of
- @a name. It must be set, and
- may be set to the same pointer
- value as @a name. */
-
- /* IMPORTANT: Some code in log.c allocates these without zeroing them.
- * IMPORTANT: Update that code if you add members here. */
- };
-
- #ifdef __cplusplus
- extern "C" {
- #endif
-
- /***************************************/
- /** @name Log Functions */
- /***************************************/
- /*@{*/
-
- /**
- * Creates a new log
- *
- * @param type The type of log this is.
- * @param name The name of this conversation (screenname, chat name,
- * etc.)
- * @param account The account the conversation is occurring on
- * @param conv The conversation being logged
- * @param time The time this conversation started
- * @param tm The time this conversation started, with timezone data,
- * if available and if struct tm has the BSD timezone fields.
- * @return The new log
- */
- PurpleLog *purple_log_new(PurpleLogType type, const char *name, PurpleAccount *account,
- PurpleConversation *conv, time_t time, const struct tm *tm);
-
- /**
- * Frees a log
- *
- * @param log The log to destroy
- */
- void purple_log_free(PurpleLog *log);
-
- /**
- * Writes to a log file. Assumes you have checked preferences already.
- *
- * @param log The log to write to
- * @param type The type of message being logged
- * @param from Whom this message is coming from, or @c NULL for
- * system messages
- * @param time A timestamp in UNIX time
- * @param message The message to log
- */
- void purple_log_write(PurpleLog *log,
- PurpleMessageFlags type,
- const char *from,
- time_t time,
- const char *message);
-
- /**
- * Reads from a log
- *
- * @param log The log to read from
- * @param flags The returned logging flags.
- *
- * @return The contents of this log in Purple Markup.
- */
- char *purple_log_read(PurpleLog *log, PurpleLogReadFlags *flags);
-
- /**
- * Returns a list of all available logs
- *
- * @param type The type of the log
- * @param name The name of the log
- * @param account The account
- * @return A sorted list of PurpleLogs
- */
- GList *purple_log_get_logs(PurpleLogType type, const char *name, PurpleAccount *account);
-
- /**
- * Returns a GHashTable of PurpleLogSets.
- *
- * A "log set" here means the information necessary to gather the
- * PurpleLogs for a given buddy/chat. This information would be passed
- * to purple_log_list to get a list of PurpleLogs.
- *
- * The primary use of this function is to get a list of everyone the
- * user has ever talked to (assuming he or she uses logging).
- *
- * The GHashTable that's returned will free all log sets in it when
- * destroyed. If a PurpleLogSet is removed from the GHashTable, it
- * must be freed with purple_log_set_free().
- *
- * @return A GHashTable of all available unique PurpleLogSets
- */
- GHashTable *purple_log_get_log_sets(void);
-
- /**
- * Returns a list of all available system logs
- *
- * @param account The account
- * @return A sorted list of PurpleLogs
- */
- GList *purple_log_get_system_logs(PurpleAccount *account);
-
- /**
- * Returns the size of a log
- *
- * @param log The log
- * @return The size of the log, in bytes
- */
- int purple_log_get_size(PurpleLog *log);
-
- /**
- * Returns the size, in bytes, of all available logs in this conversation
- *
- * @param type The type of the log
- * @param name The name of the log
- * @param account The account
- * @return The size in bytes
- */
- int purple_log_get_total_size(PurpleLogType type, const char *name, PurpleAccount *account);
-
- /**
- * Tests whether a log is deletable
- *
- * A return value of @c FALSE indicates that purple_log_delete() will fail on this
- * log, unless something changes between the two calls. A return value of @c TRUE,
- * however, does not guarantee the log can be deleted.
- *
- * @param log The log
- * @return A boolean indicating if the log is deletable
- */
- gboolean purple_log_is_deletable(PurpleLog *log);
-
- /**
- * Deletes a log
- *
- * @param log The log
- * @return A boolean indicating success or failure
- */
- gboolean purple_log_delete(PurpleLog *log);
-
- /**
- * Returns the default logger directory Purple uses for a given account
- * and username. This would be where Purple stores logs created by
- * the built-in text or HTML loggers.
- *
- * @param type The type of the log.
- * @param name The name of the log.
- * @param account The account.
- * @return The default logger directory for Purple.
- */
- char *purple_log_get_log_dir(PurpleLogType type, const char *name, PurpleAccount *account);
-
- /**
- * Implements GCompareFunc for PurpleLogs
- *
- * @param y A PurpleLog
- * @param z Another PurpleLog
- * @return A value as specified by GCompareFunc
- */
- gint purple_log_compare(gconstpointer y, gconstpointer z);
-
- /**
- * Implements GCompareFunc for PurpleLogSets
- *
- * @param y A PurpleLogSet
- * @param z Another PurpleLogSet
- * @return A value as specified by GCompareFunc
- */
- gint purple_log_set_compare(gconstpointer y, gconstpointer z);
-
- /**
- * Frees a log set
- *
- * @param set The log set to destroy
- */
- void purple_log_set_free(PurpleLogSet *set);
-
- /*@}*/
-
- /******************************************/
- /** @name Common Logger Functions */
- /******************************************/
- /*@{*/
-
- /**
- * Opens a new log file in the standard Purple log location
- * with the given file extension, named for the current time,
- * for writing. If a log file is already open, the existing
- * file handle is retained. The log's logger_data value is
- * set to a PurpleLogCommonLoggerData struct containing the log
- * file handle and log path.
- *
- * This function is intended to be used as a "common"
- * implementation of a logger's @c write function.
- * It should only be passed to purple_log_logger_new() and never
- * called directly.
- *
- * @param log The log to write to.
- * @param ext The file extension to give to this log file.
- */
- void purple_log_common_writer(PurpleLog *log, const char *ext);
-
- /**
- * Returns a sorted GList of PurpleLogs of the requested type.
- *
- * This function should only be used with logs that are written
- * with purple_log_common_writer(). It's intended to be used as
- * a "common" implementation of a logger's @c list function.
- * It should only be passed to purple_log_logger_new() and never
- * called directly.
- *
- * @param type The type of the logs being listed.
- * @param name The name of the log.
- * @param account The account of the log.
- * @param ext The file extension this log format uses.
- * @param logger A reference to the logger struct for this log.
- *
- * @return A sorted GList of PurpleLogs matching the parameters.
- */
- GList *purple_log_common_lister(PurpleLogType type, const char *name,
- PurpleAccount *account, const char *ext,
- PurpleLogLogger *logger);
-
- /**
- * Returns the total size of all the logs for a given user, with
- * a given extension.
- *
- * This function should only be used with logs that are written
- * with purple_log_common_writer(). It's intended to be used as
- * a "common" implementation of a logger's @c total_size function.
- * It should only be passed to purple_log_logger_new() and never
- * called directly.
- *
- * @param type The type of the logs being sized.
- * @param name The name of the logs to size
- * (e.g. the username or chat name).
- * @param account The account of the log.
- * @param ext The file extension this log format uses.
- *
- * @return The size of all the logs with the specified extension
- * for the specified user.
- */
- int purple_log_common_total_sizer(PurpleLogType type, const char *name,
- PurpleAccount *account, const char *ext);
-
- /**
- * Returns the size of a given PurpleLog.
- *
- * This function should only be used with logs that are written
- * with purple_log_common_writer(). It's intended to be used as
- * a "common" implementation of a logger's @c size function.
- * It should only be passed to purple_log_logger_new() and never
- * called directly.
- *
- * @param log The PurpleLog to size.
- *
- * @return An integer indicating the size of the log in bytes.
- */
- int purple_log_common_sizer(PurpleLog *log);
-
- /**
- * Deletes a log
- *
- * This function should only be used with logs that are written
- * with purple_log_common_writer(). It's intended to be used as
- * a "common" implementation of a logger's @c delete function.
- * It should only be passed to purple_log_logger_new() and never
- * called directly.
- *
- * @param log The PurpleLog to delete.
- *
- * @return A boolean indicating success or failure.
- */
- gboolean purple_log_common_deleter(PurpleLog *log);
-
- /**
- * Checks to see if a log is deletable
- *
- * This function should only be used with logs that are written
- * with purple_log_common_writer(). It's intended to be used as
- * a "common" implementation of a logger's @c is_deletable function.
- * It should only be passed to purple_log_logger_new() and never
- * called directly.
- *
- * @param log The PurpleLog to check.
- *
- * @return A boolean indicating if the log is deletable.
- */
- gboolean purple_log_common_is_deletable(PurpleLog *log);
-
- /*@}*/
-
- /******************************************/
- /** @name Logger Functions */
- /******************************************/
- /*@{*/
-
- /**
- * Creates a new logger
- *
- * @param id The logger's id.
- * @param name The logger's name.
- * @param functions The number of functions being passed. The following
- * functions are currently available (in order): @c create,
- * @c write, @c finalize, @c list, @c read, @c size,
- * @c total_size, @c list_syslog, @c get_log_sets,
- * @c remove, @c is_deletable.
- * For details on these functions, see PurpleLogLogger.
- * Functions may not be skipped. For example, passing
- * @c create and @c write is acceptable (for a total of
- * two functions). Passing @c create and @c finalize,
- * however, is not. To accomplish that, the caller must
- * pass @c create, @c NULL (a placeholder for @c write),
- * and @c finalize (for a total of 3 functions).
- *
- * @return The new logger
- */
- PurpleLogLogger *purple_log_logger_new(const char *id, const char *name, int functions, ...);
-
- /**
- * Frees a logger
- *
- * @param logger The logger to free
- */
- void purple_log_logger_free(PurpleLogLogger *logger);
-
- /**
- * Adds a new logger
- *
- * @param logger The new logger to add
- */
- void purple_log_logger_add (PurpleLogLogger *logger);
-
- /**
- *
- * Removes a logger
- *
- * @param logger The logger to remove
- */
- void purple_log_logger_remove (PurpleLogLogger *logger);
-
- /**
- *
- * Sets the current logger
- *
- * @param logger The logger to set
- */
- void purple_log_logger_set (PurpleLogLogger *logger);
-
- /**
- *
- * Returns the current logger
- *
- * @return logger The current logger
- */
- PurpleLogLogger *purple_log_logger_get (void);
-
- /**
- * Returns a GList containing the IDs and names of the registered
- * loggers.
- *
- * @return The list of IDs and names.
- */
- GList *purple_log_logger_get_options(void);
-
- /**************************************************************************/
- /** @name Log Subsystem */
- /**************************************************************************/
- /*@{*/
-
- /**
- * Initializes the log subsystem.
- */
- void purple_log_init(void);
-
- /**
- * Returns the log subsystem handle.
- *
- * @return The log subsystem handle.
- */
- void *purple_log_get_handle(void);
-
- /**
- * Uninitializes the log subsystem.
- */
- void purple_log_uninit(void);
-
- /*@}*/
-
-
- #ifdef __cplusplus
- }
- #endif
-
- #endif /* _PURPLE_LOG_H_ */
-