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source: nick.c @ 09dfb68

Last change on this file since 09dfb68 was 09dfb68, checked in by Wilmer van der Gaast <wilmer@…>, at 2010-07-12T20:27:11Z
Added %nick and %group. They don't work yet since nick_gen() is only called once.
Property mode set to `100644`
File size: 8.6 KB

Line
1	/********************************************************************\
2	* BitlBee -- An IRC to other IM-networks gateway *
3	* *
4	* Copyright 2002-2010 Wilmer van der Gaast and others *
5	\********************************************************************/
6
7	/* Some stuff to fetch, save and handle nicknames for your buddies */
8
9	/*
10	This program is free software; you can redistribute it and/or modify
11	it under the terms of the GNU General Public License as published by
12	the Free Software Foundation; either version 2 of the License, or
13	(at your option) any later version.
14
15	This program is distributed in the hope that it will be useful,
16	but WITHOUT ANY WARRANTY; without even the implied warranty of
17	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18	GNU General Public License for more details.
19
20	You should have received a copy of the GNU General Public License with
21	the Debian GNU/Linux distribution in /usr/share/common-licenses/GPL;
22	if not, write to the Free Software Foundation, Inc., 59 Temple Place,
23	Suite 330, Boston, MA 02111-1307 USA
24	*/
25
26	#define BITLBEE_CORE
27	#include "bitlbee.h"
28
29	/* Character maps, _lc_[x] == _uc_[x] (but uppercase), according to the RFC's.
30	With one difference, we allow dashes. These are used to do uc/lc conversions
31	and strip invalid chars. */
32	static char *nick_lc_chars = "0123456789abcdefghijklmnopqrstuvwxyz{}^`-_\|";
33	static char *nick_uc_chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ[]~`-_\\";
34
35	/* Store handles in lower case and strip spaces, because AIM is braindead. */
36	static char clean_handle( const char orig )
37	{
38	char *new = g_malloc( strlen( orig ) + 1 );
39	int i = 0;
40
41	do {
42	if (*orig != ' ')
43	new[i++] = tolower( *orig );
44	}
45	while (*(orig++));
46
47	return new;
48	}
49
50	void nick_set_raw( account_t acc, const char handle, const char *nick )
51	{
52	char store_handle, store_nick = g_malloc( MAX_NICK_LENGTH + 1 );
53
54	store_handle = clean_handle( handle );
55	store_nick[MAX_NICK_LENGTH] = '\0';
56	strncpy( store_nick, nick, MAX_NICK_LENGTH );
57	nick_strip( store_nick );
58
59	g_hash_table_replace( acc->nicks, store_handle, store_nick );
60	}
61
62	void nick_set( bee_user_t bu, const char nick )
63	{
64	nick_set_raw( bu->ic->acc, bu->handle, nick );
65	}
66
67	char nick_get( bee_user_t bu )
68	{
69	static char nick[MAX_NICK_LENGTH+1];
70	char store_handle, found_nick;
71
72	memset( nick, 0, MAX_NICK_LENGTH + 1 );
73
74	store_handle = clean_handle( bu->handle );
75	/* Find out if we stored a nick for this person already. If not, try
76	to generate a sane nick automatically. */
77	if( ( found_nick = g_hash_table_lookup( bu->ic->acc->nicks, store_handle ) ) )
78	{
79	strncpy( nick, found_nick, MAX_NICK_LENGTH );
80	}
81	else if( ( found_nick = nick_gen( bu ) ) )
82	{
83	strncpy( nick, found_nick, MAX_NICK_LENGTH );
84	g_free( found_nick );
85	}
86	else
87	{
88	/* Keep this fallback since nick_gen() can return NULL in some cases. */
89	char *s;
90
91	g_snprintf( nick, MAX_NICK_LENGTH, "%s", bu->handle );
92	if( ( s = strchr( nick, '@' ) ) )
93	while( *s )
94	*(s++) = 0;
95
96	nick_strip( nick );
97	if( set_getbool( &bu->bee->set, "lcnicks" ) )
98	nick_lc( nick );
99	}
100	g_free( store_handle );
101
102	/* Make sure the nick doesn't collide with an existing one by adding
103	underscores and that kind of stuff, if necessary. */
104	nick_dedupe( bu, nick );
105
106	return nick;
107	}
108
109	char nick_gen( bee_user_t bu )
110	{
111	gboolean ok = FALSE; /* Set to true once the nick contains something unique. */
112	GString *ret = g_string_new( "" );
113	char *fmt = set_getstr( &bu->ic->acc->set, "nick_format" ) ? :
114	set_getstr( &bu->bee->set, "nick_format" );
115
116	while( fmt && *fmt && ret->len < MAX_NICK_LENGTH )
117	{
118	char *part, chop = '\0';
119
120	if( *fmt != '%' )
121	{
122	g_string_append_c( ret, *fmt );
123	fmt ++;
124	continue;
125	}
126
127	fmt ++;
128	while( *fmt )
129	{
130	/* -char means chop off everything from char */
131	if( *fmt == '-' )
132	{
133	chop = fmt[1];
134	if( chop == '\0' )
135	return NULL;
136	fmt += 2;
137	}
138	else if( g_strncasecmp( fmt, "nick", 4 ) == 0 )
139	{
140	part = bu->nick ? : bu->handle;
141	fmt += 4;
142	ok \|= TRUE;
143	break;
144	}
145	else if( g_strncasecmp( fmt, "handle", 6 ) == 0 )
146	{
147	part = bu->handle;
148	fmt += 6;
149	ok \|= TRUE;
150	break;
151	}
152	else if( g_strncasecmp( fmt, "full_name", 9 ) == 0 )
153	{
154	part = bu->fullname;
155	fmt += 9;
156	ok \|= part && *part;
157	break;
158	}
159	else if( g_strncasecmp( fmt, "first_name", 10 ) == 0 )
160	{
161	part = bu->fullname;
162	fmt += 10;
163	ok \|= part && *part;
164	chop = ' ';
165	break;
166	}
167	else if( g_strncasecmp( fmt, "group", 5 ) == 0 )
168	{
169	part = bu->group ? bu->group->name : NULL;
170	fmt += 5;
171	break;
172	}
173	else
174	{
175	return NULL;
176	}
177	}
178
179	while( part && part && part != chop )
180	{
181	if( strchr( nick_lc_chars, *part ) \|\|
182	strchr( nick_uc_chars, *part ) )
183	g_string_append_c( ret, *part );
184
185	part ++;
186	}
187	}
188
189	/* This returns NULL if the nick is empty or otherwise not ok. */
190	return g_string_free( ret, ret->len == 0 \|\| !ok );
191	}
192
193	void nick_dedupe( bee_user_t *bu, char nick[MAX_NICK_LENGTH+1] )
194	{
195	irc_t irc = (irc_t) bu->bee->ui_data;
196	int inf_protection = 256;
197
198	/* Now, find out if the nick is already in use at the moment, and make
199	subtle changes to make it unique. */
200	while( !nick_ok( nick ) \|\| irc_user_by_name( irc, nick ) )
201	{
202	if( strlen( nick ) < ( MAX_NICK_LENGTH - 1 ) )
203	{
204	nick[strlen(nick)+1] = 0;
205	nick[strlen(nick)] = '_';
206	}
207	else
208	{
209	nick[0] ++;
210	}
211
212	if( inf_protection-- == 0 )
213	{
214	int i;
215
216	irc_usermsg( irc, "Warning: Almost had an infinite loop in nick_get()! "
217	"This used to be a fatal BitlBee bug, but we tried to fix it. "
218	"This message should never appear anymore. "
219	"If it does, please do send us a bug report! "
220	"Please send all the following lines in your report:" );
221
222	irc_usermsg( irc, "Trying to get a sane nick for handle %s", bu->handle );
223	for( i = 0; i < MAX_NICK_LENGTH; i ++ )
224	irc_usermsg( irc, "Char %d: %c/%d", i, nick[i], nick[i] );
225
226	irc_usermsg( irc, "FAILED. Returning an insane nick now. Things might break. "
227	"Good luck, and please don't forget to paste the lines up here "
228	"in #bitlbee on OFTC or in a mail to wilmer@gaast.net" );
229
230	g_snprintf( nick, MAX_NICK_LENGTH + 1, "xx%x", rand() );
231
232	break;
233	}
234	}
235	}
236
237	/* Just check if there is a nickname set for this buddy or if we'd have to
238	generate one. */
239	int nick_saved( bee_user_t *bu )
240	{
241	char store_handle, found;
242
243	store_handle = clean_handle( bu->handle );
244	found = g_hash_table_lookup( bu->ic->acc->nicks, store_handle );
245	g_free( store_handle );
246
247	return found != NULL;
248	}
249
250	void nick_del( bee_user_t *bu )
251	{
252	g_hash_table_remove( bu->ic->acc->nicks, bu->handle );
253	}
254
255
256	void nick_strip( char *nick )
257	{
258	int i, j;
259
260	for( i = j = 0; nick[i] && j < MAX_NICK_LENGTH; i++ )
261	{
262	if( strchr( nick_lc_chars, nick[i] ) \|\|
263	strchr( nick_uc_chars, nick[i] ) )
264	{
265	nick[j] = nick[i];
266	j++;
267	}
268	}
269	if( isdigit( nick[0] ) )
270	{
271	char *orig;
272
273	orig = g_strdup( nick );
274	g_snprintf( nick, MAX_NICK_LENGTH, "_%s", orig );
275	g_free( orig );
276	j ++;
277	}
278	while( j <= MAX_NICK_LENGTH )
279	nick[j++] = '\0';
280	}
281
282	int nick_ok( const char *nick )
283	{
284	const char *s;
285
286	/* Empty/long nicks are not allowed, nor numbers at [0] */
287	if( !*nick \|\| isdigit( nick[0] ) \|\| strlen( nick ) > MAX_NICK_LENGTH )
288	return( 0 );
289
290	for( s = nick; *s; s ++ )
291	if( !strchr( nick_lc_chars, s ) && !strchr( nick_uc_chars, s ) )
292	return( 0 );
293
294	return( 1 );
295	}
296
297	int nick_lc( char *nick )
298	{
299	static char tab[128] = { 0 };
300	int i;
301
302	if( tab['A'] == 0 )
303	for( i = 0; nick_lc_chars[i]; i ++ )
304	{
305	tab[(int)nick_uc_chars[i]] = nick_lc_chars[i];
306	tab[(int)nick_lc_chars[i]] = nick_lc_chars[i];
307	}
308
309	for( i = 0; nick[i]; i ++ )
310	{
311	if( !tab[(int)nick[i]] )
312	return( 0 );
313
314	nick[i] = tab[(int)nick[i]];
315	}
316
317	return( 1 );
318	}
319
320	int nick_uc( char *nick )
321	{
322	static char tab[128] = { 0 };
323	int i;
324
325	if( tab['A'] == 0 )
326	for( i = 0; nick_lc_chars[i]; i ++ )
327	{
328	tab[(int)nick_uc_chars[i]] = nick_uc_chars[i];
329	tab[(int)nick_lc_chars[i]] = nick_uc_chars[i];
330	}
331
332	for( i = 0; nick[i]; i ++ )
333	{
334	if( !tab[(int)nick[i]] )
335	return( 0 );
336
337	nick[i] = tab[(int)nick[i]];
338	}
339
340	return( 1 );
341	}
342
343	int nick_cmp( const char a, const char b )
344	{
345	char aa[1024] = "", bb[1024] = "";
346
347	strncpy( aa, a, sizeof( aa ) - 1 );
348	strncpy( bb, b, sizeof( bb ) - 1 );
349	if( nick_lc( aa ) && nick_lc( bb ) )
350	{
351	return( strcmp( aa, bb ) );
352	}
353	else
354	{
355	return( -1 ); /* Hmm... Not a clear answer.. :-/ */
356	}
357	}
358
359	char nick_dup( const char nick )
360	{
361	return g_strndup( nick, MAX_NICK_LENGTH );
362	}

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