src/log.c

/**
 * @file log.c Logging API
 * @ingroup core
 *
 * gaim
 *
 * Copyright (C) 2003 Buzz Lightyear
 *
 * 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
 */

#include "account.h"
#include "debug.h"
#include "internal.h"
#include "log.h"
#include "prefs.h"
#include "util.h"

static GaimLogLogger txt_logger;
static GaimLogLogger old_logger;

/**************************************************************************
 * PUBLIC LOGGING FUNCTIONS ***********************************************
 **************************************************************************/

GaimLog *gaim_log_new(GaimLogType type, const char *name, GaimAccount *account, time_t time)
{
	GaimLog *log = g_new0(GaimLog, 1);
	log->name = g_strdup(name);
	log->account = account;
	log->time = time;
	log->logger = gaim_log_logger_get();
	if (log->logger && log->logger->create)
		log->logger->create(log);
	return log;
}

void gaim_log_free(GaimLog *log)
{
	g_return_if_fail(log);
	if (log->logger && log->logger->finalize)
		log->logger->finalize(log);
	g_free(log->name);
	g_free(log);
}


void gaim_log_write(GaimLog *log, GaimMessageFlags type,
		    const char *from, time_t time, const char *message)
{
	g_return_if_fail(log);
	g_return_if_fail(log->logger);
	g_return_if_fail(log->logger->write);

	log->logger->write(log, type, from, time, message);
}

char *gaim_log_read(GaimLog *log, GaimLogReadFlags *flags)
{
	g_return_val_if_fail(log && log->logger, NULL);
	if (log->logger->read)
		return log->logger->read(log, flags);
	return (_("<b><font color\"=red\">The logger has no read function</font></b>"));
}

/****************************************************************************
 * LOGGER FUNCTIONS *********************************************************
 ****************************************************************************/

static GaimLogLogger *current_logger = NULL;
static GSList *loggers = NULL;

static void logger_pref_cb(const char *name, GaimPrefType type,
			   gpointer value, gpointer data)
{
	GaimLogLogger *logger;
	GSList *l = loggers;
	while (l) {
		logger = l->data;
		if (!strcmp(logger->id, value)) {
			gaim_log_logger_set(logger);
			return;
		}
		l = l->next;
	}
	gaim_log_logger_set(&txt_logger);
}


GaimLogLogger *gaim_log_logger_new(void(*create)(GaimLog *),
				   void(*write)(GaimLog *, GaimMessageFlags, const char *,
						time_t, const char *),
				   void(*finalize)(GaimLog *), GList*(*list)(const char*, GaimAccount*),
				   char*(*read)(GaimLog*, GaimLogReadFlags*))
{
	GaimLogLogger *logger = g_new0(GaimLogLogger, 1);
	logger->create = create;
	logger->write = write;
	logger->finalize = finalize;
	logger->list = list;
	logger->read = read;
	return logger;
}

void gaim_log_logger_free(GaimLogLogger *logger)
{
	g_free(logger);
}

void gaim_log_logger_add (GaimLogLogger *logger)
{
	g_return_if_fail(logger);
	if (g_slist_find(loggers, logger))
		return;
	loggers = g_slist_append(loggers, logger);
}

void gaim_log_logger_remove (GaimLogLogger *logger)
{
	g_return_if_fail(logger);
	g_slist_remove(loggers, logger);
}

void gaim_log_logger_set (GaimLogLogger *logger)
{
	g_return_if_fail(logger);
	current_logger = logger;
}

GaimLogLogger *gaim_log_logger_get()
{
	return current_logger;
}

GList *gaim_log_logger_get_options(void)
{
	GSList *n;
	GList *list = NULL;
	GaimLogLogger *data;

	for (n = loggers; n; n = n->next) {
		data = n->data;
		if (!data->write)
			continue;
		list = g_list_append(list, data->name);
		list = g_list_append(list, data->id);
	}

	return list;
}

static gint log_compare(gconstpointer y, gconstpointer z)
{
	const GaimLog *a = y;
	const GaimLog *b = z;

	return b->time - a->time;
}

GList *gaim_log_get_logs(const char *name, GaimAccount *account)
{
	GList *logs = NULL;
	GSList *n;
	for (n = loggers; n; n = n->next) {
		GaimLogLogger *logger = n->data;
		if (!logger->list)
			continue;
		logs = g_list_concat(logs, logger->list(name, account));
	}

	return g_list_sort(logs, log_compare);
}

void gaim_log_init(void)
{
	gaim_prefs_add_none("/core/logging");
	gaim_prefs_add_string("/core/logging/format", "txt");
	gaim_log_logger_add(&txt_logger);
	gaim_log_logger_add(&old_logger);
	gaim_prefs_connect_callback("/core/logging/format",
				    logger_pref_cb, NULL);
	gaim_prefs_trigger_callback("/core/logging/format");
}

/****************************************************************************
 * LOGGERS ******************************************************************
 ****************************************************************************/

static GList *log_lister_common(const char *screenname, GaimAccount *account, const char *ext, GaimLogLogger *logger)
{
	GDir *dir;
	GList *list = NULL;
	const char *filename;
	char *me = g_strdup(gaim_normalize(account, gaim_account_get_username(account)));

	const char *prpl = GAIM_PLUGIN_PROTOCOL_INFO
		(gaim_find_prpl(gaim_account_get_protocol(account)))->list_icon(account, NULL);
	char *path = g_build_filename(gaim_user_dir(), "logs", prpl, me, gaim_normalize(account, screenname), NULL);

	if (!(dir = g_dir_open(path, 0, NULL))) {
		g_free(path);
		g_free(me);
		return NULL;
	}
	while ((filename = g_dir_read_name(dir))) {
		if (g_str_has_suffix(filename, ext)) {
			const char *l = filename;
			struct tm time;
			GaimLog *log;
			char d[5];

			strncpy(d, l, 4);
			d[4] = '\0';
			time.tm_year = atoi(d) - 1900;
			l = l + 5;

			strncpy(d, l, 2);
			d[2] = '\0';
			time.tm_mon = atoi(d) - 1;
			l = l + 3;

			strncpy(d, l, 2);
			time.tm_mday = atoi(d);
			l = l + 3;

			strncpy(d, l, 2);
			time.tm_hour = atoi(d);
			l = l + 2;

			strncpy(d, l, 2);
			time.tm_min = atoi(d);
			l = l + 2;

			strncpy(d, l, 2);
			time.tm_sec = atoi(d);
			l = l + 2;
			log = gaim_log_new(GAIM_LOG_IM, screenname, account, mktime(&time));
			log->logger = logger;
			log->logger_data = g_build_filename(path, filename, NULL);
			list = g_list_append(list, log);
		}
	}
	g_dir_close(dir);
	return list;
}

#if 0 /* Maybe some other time. */
/**************** 
 ** XML LOGGER **
 ****************/

static const char *str_from_msg_type (GaimMessageFlags type)
{
		
		return "";
	
}

static void xml_logger_write(GaimLog *log, 
			     GaimMessageFlags type, 
			     const char *from, time_t time, const char *message)
{
	char date[64];
	char *xhtml = NULL;
	if (!log->logger_data) {
		/* This log is new.  We could use the loggers 'new' function, but
		 * creating a new file there would result in empty files in the case
		 * that you open a convo with someone, but don't say anything.
		 */
		char *ud = gaim_user_dir();
		char *guy = g_strdup(gaim_normalize(log->account, gaim_account_get_username(log->account)));
		const char *prpl = GAIM_PLUGIN_PROTOCOL_INFO
			(gaim_find_prpl(gaim_account_get_protocol(log->account)))->list_icon(log->account, NULL);
		char *dir;
		FILE *file;

		strftime(date, sizeof(date), "%F.%H%M%S.xml", localtime(&log->time));
		
		dir = g_build_filename(ud, "logs", NULL);
		mkdir (dir, S_IRUSR | S_IWUSR | S_IXUSR);
		g_free(dir);
		dir = g_build_filename(ud, "logs", 
				       prpl, NULL);
		mkdir (dir, S_IRUSR | S_IWUSR | S_IXUSR);
		g_free(dir);
		dir = g_build_filename(ud, "logs", 
				       prpl, guy, NULL);
		mkdir (dir, S_IRUSR | S_IWUSR | S_IXUSR);
		g_free(dir);	      
		dir = g_build_filename(ud, "logs", 
				       prpl, guy, gaim_normalize(log->account, log->name), NULL);
		mkdir (dir, S_IRUSR | S_IWUSR | S_IXUSR);
						 
		char *filename = g_build_filename(dir, date, NULL);
		g_free(dir);
		
		file = fopen(dir, "r");
		if(!file)
			mkdir(dir, S_IRUSR | S_IWUSR | S_IXUSR);
		else
			fclose(file);
		
		log->logger_data = fopen(filename, "a");
		if (!log->logger_data) {
			gaim_debug(GAIM_DEBUG_ERROR, "log", "Could not create log file %s\n", filename);
			return;
		}
		fprintf(log->logger_data, "<?xml version='1.0' encoding='UTF-8' ?>\n"
			"<?xml-stylesheet href='file:///usr/src/web/htdocs/log-stylesheet.xsl' type='text/xml' ?>\n");
		
		strftime(date, sizeof(date), "%F %T", localtime(&log->time));
		fprintf(log->logger_data, "<conversation time='%s' screenname='%s' protocol='%s'>\n",
			date, log->name, prpl);
	}
	
	strftime(date, sizeof(date), "%T", localtime(&time));
	gaim_markup_html_to_xhtml(message, &xhtml, NULL);
	if (from)
		fprintf(log->logger_data, "<message %s %s from='%s' time='%s'>%s</message>\n", 
			str_from_msg_type(type), 
			type & GAIM_MESSAGE_SEND ? "direction='sent'" :
			type & GAIM_MESSAGE_RECV ? "direction='received'" : "",
			from, date, xhtml);
	else
		fprintf(log->logger_data, "<message %s %s time='%s'>%s</message>\n", 
			str_from_msg_type(type), 
			type & GAIM_MESSAGE_SEND ? "direction='sent'" :
			type & GAIM_MESSAGE_RECV ? "direction='received'" : "",
			date, xhtml);	
	fflush(log->logger_data);
	g_free(xhtml);
} 	    
 
 static void xml_logger_finalize(GaimLog *log)
{
	if (log->logger_data) {
		fprintf(log->logger_data, "</conversation>\n");
		fclose(log->logger_data);
		log->logger_data = NULL;
	}
}
	       
static GList *xml_logger_list(const char *sn, GaimAccount *account)
{
	return log_lister_common(sn, account, ".xml", &xml_logger);
}

static GaimLogLogger xml_logger =  {
	N_("XML"), "xml",
	NULL,
	xml_logger_write,
	xml_logger_finalize,
	xml_logger_list,
	NULL
};
#endif

/****************************
 ** PLAIN TEXT LOGGER *******
 ****************************/

static void txt_logger_write(GaimLog *log,
			     GaimMessageFlags type,
			     const char *from, time_t time, const char *message)
{
	char date[64];
	char *stripped = NULL;
	if (!log->logger_data) {
		/* This log is new.  We could use the loggers 'new' function, but
		 * creating a new file there would result in empty files in the case
		 * that you open a convo with someone, but don't say anything.
		 */
		char *ud = gaim_user_dir();
		char *guy = g_strdup(gaim_normalize(log->account, gaim_account_get_username(log->account)));
		const char *prpl = GAIM_PLUGIN_PROTOCOL_INFO
			(gaim_find_prpl(gaim_account_get_protocol(log->account)))->list_icon(log->account, NULL);
		char *dir;
		FILE *file;

		strftime(date, sizeof(date), "%F.%H%M%S.txt", localtime(&log->time));

		dir = g_build_filename(ud, "logs", NULL);
		mkdir (dir, S_IRUSR | S_IWUSR | S_IXUSR);
		g_free(dir);
		dir = g_build_filename(ud, "logs",
				       prpl, NULL);
		mkdir (dir, S_IRUSR | S_IWUSR | S_IXUSR);
		g_free(dir);
		dir = g_build_filename(ud, "logs",
				       prpl, guy, NULL);
		mkdir (dir, S_IRUSR | S_IWUSR | S_IXUSR);
		g_free(dir);
		dir = g_build_filename(ud, "logs",
				       prpl, guy, gaim_normalize(log->account, log->name), NULL);
		mkdir (dir, S_IRUSR | S_IWUSR | S_IXUSR);

		char *filename = g_build_filename(dir, date, NULL);
		g_free(dir);

		file = fopen(dir, "r");
		if(!file)
			mkdir(dir, S_IRUSR | S_IWUSR | S_IXUSR);
		else
			fclose(file);

		log->logger_data = fopen(filename, "a");
		if (!log->logger_data) {
			gaim_debug(GAIM_DEBUG_ERROR, "log", "Could not create log file %s\n", filename);
			return;
		}
		strftime(date, sizeof(date), "%F %T", localtime(&log->time));
		fprintf(log->logger_data, "Conversation with %s at %s on %s (%s)\n",
			log->name, date, gaim_account_get_username(log->account), prpl);
	}

	strftime(date, sizeof(date), "%T", localtime(&time));
	stripped = gaim_markup_strip_html(message);
	fprintf(log->logger_data, "(%s) %s%s %s\n", date, from ? from : "", from ? ":" : "", stripped);
	fflush(log->logger_data);
	g_free(stripped);
}

static void txt_logger_finalize(GaimLog *log)
{
	if (log->logger_data)
		fclose(log->logger_data);
}

static GList *txt_logger_list(const char *sn, GaimAccount *account)
{
	return log_lister_common(sn, account, ".txt", &txt_logger);
}

static char *txt_logger_read(GaimLog *log, GaimLogReadFlags *flags)
{
	char *read, *minus_header;
	if (!log->logger_data)
		return g_strdup("<font color='red'><b>log->logger_data was NULL!</b></font>");
	if (g_file_get_contents((char *)log->logger_data, &read, NULL, NULL)) {
		minus_header = strchr(read, '\n');
		if (!minus_header)
			minus_header = g_strdup(read);
		else
			minus_header = g_strdup(minus_header + 1);
		g_free(read);
		return minus_header;
	}
        return g_strdup(_("<font color='red'><b>Could not read file: %s</b></font>"));
}

static GaimLogLogger txt_logger = {
	N_("Plain text"), "txt",
	NULL,
	txt_logger_write,
	txt_logger_finalize,
	txt_logger_list,
	txt_logger_read
};

/****************
 * OLD LOGGER ***
 ****************/

/* The old logger doesn't write logs, only reads them.  This is to include
 * old logs in the log viewer transparently.
 */

struct old_logger_data {
	char *path;
	int offset;
	int length;
};

static GList *old_logger_list(const char *sn, GaimAccount *account)
{
	FILE *file;
	char buf[BUF_LONG];
	struct tm tm;
	struct old_logger_data *data = NULL;
	char day[4], month[4], year[5];
	char *logfile = g_strdup_printf("%s.log", gaim_normalize(account, sn));
	char *date;
	char *path = g_build_filename(gaim_user_dir(), "logs", logfile, NULL);
	char *newlog;

	GaimLog *log = NULL;
	GList *list = NULL;

	if (!(file = fopen(path, "r")))
		return NULL;

	while (fgets(buf, BUF_LONG, file)) {
		if ((newlog = strstr(buf, "---- New C"))) {
			int length;
			int offset;
			GDate gdate;
			char convostart[32];
			char *temp = strchr(buf, '@');

			if (temp == NULL || strlen(temp) < 2)
				continue;

			temp++;
			length = strcspn(temp, "-");
			if (length > 31) length = 31;

			offset = ftell(file);

			if (data) {
				data->length = offset - data->offset - length;
				if(strstr(buf, "----</H3><BR>")) {
					data->length -=
						strlen("<HR><BR><H3 Align=Center> ---- New Conversation @ ") +
						strlen("----</H3><BR>");
				} else {
					data->length -=
						strlen("---- New Conversation @ ") + strlen("----");
				}

				if (data->length != 0)
					list = g_list_append(list, log);
				else
					gaim_log_free(log);
			}

			log = gaim_log_new(GAIM_LOG_IM, sn, account, -1);
			log->logger = &old_logger;

			data = g_new0(struct old_logger_data, 1);
			data->offset = offset;
			data->path   = path;
			log->logger_data = data;


			g_snprintf(convostart, length, "%s", temp);
			sscanf(convostart, "%*s %s %s %d:%d:%d %s",
			       month, day, &tm.tm_hour, &tm.tm_min, &tm.tm_sec, year);
			date = g_strdup_printf("%s %s %s", month, day, year);
			g_date_set_parse(&gdate, date);
			tm.tm_mday = g_date_get_day(&gdate);
			tm.tm_mon =  g_date_get_month(&gdate) - 1;
			tm.tm_year = g_date_get_year(&gdate) - 1900;
			log->time = mktime(&tm);

		}
	}
	fclose(file);
	return list;
}

char * old_logger_read (GaimLog *log, GaimLogReadFlags *flags)
{
	struct old_logger_data *data = log->logger_data;
	FILE *file = fopen(data->path, "r");
	char *read = g_malloc(data->length + 1);
	fseek(file, data->offset, SEEK_SET);
	fread(read, data->length, 1, file);
	read[data->length] = '\0';
	*flags = 0;
	if(strstr(read, "<BR>"))
		*flags |= GAIM_LOG_READ_NO_NEWLINE;
	return read;
}

static GaimLogLogger old_logger = {
	"old logger", "old",
	NULL, NULL, NULL,
	old_logger_list,
	old_logger_read
};