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More reliable (hopefully) XMPP logout (unavailable +
[citadel.git] / citadel / modules / jabber / xmpp_presence.c
1 /*
2  * $Id$ 
3  *
4  * Handle XMPP presence exchanges
5  *
6  * Copyright (c) 2007 by Art Cancro
7  * This code is released under the terms of the GNU General Public License.
8  *
9  */
10
11 #include "sysdep.h"
12 #include <stdlib.h>
13 #include <unistd.h>
14 #include <stdio.h>
15 #include <fcntl.h>
16 #include <signal.h>
17 #include <pwd.h>
18 #include <errno.h>
19 #include <sys/types.h>
20
21 #if TIME_WITH_SYS_TIME
22 # include <sys/time.h>
23 # include <time.h>
24 #else
25 # if HAVE_SYS_TIME_H
26 #  include <sys/time.h>
27 # else
28 #  include <time.h>
29 # endif
30 #endif
31
32 #include <sys/wait.h>
33 #include <string.h>
34 #include <limits.h>
35 #include <ctype.h>
36 #include <libcitadel.h>
37 #include "citadel.h"
38 #include "server.h"
39 #include "citserver.h"
40 #include "support.h"
41 #include "config.h"
42 #include "internet_addressing.h"
43 #include "md5.h"
44 #include "ctdl_module.h"
45
46 #ifdef HAVE_EXPAT
47 #include <expat.h>
48 #include "serv_xmpp.h"
49
50
51 /* 
52  * Initial dump of the entire wholist
53  */
54 void jabber_wholist_presence_dump(void)
55 {
56         struct CitContext *cptr = NULL;
57         int aide = (CC->user.axlevel >= 6);
58
59         for (cptr = ContextList; cptr != NULL; cptr = cptr->next) {
60                 if (
61                    (((cptr->cs_flags&CS_STEALTH)==0) || (aide))         /* aides can see everyone */
62                    && (cptr->user.usernum != CC->user.usernum)          /* don't tell me about myself */
63                    ) {
64                         cprintf("<presence type=\"available\" from=\"%s\"></presence>", cptr->cs_inet_email);
65                 }
66         }
67 }
68
69
70
71 /*
72  * When a user logs in or out of the local Citadel system, notify all Jabber sessions
73  * about it.
74  */
75 void xmpp_presence_notify(char *presence_jid, int event_type) {
76         struct CitContext *cptr;
77         static int unsolicited_id;
78         int visible_sessions = 0;
79         int aide = (CC->user.axlevel >= 6);
80
81         if (IsEmptyStr(presence_jid)) return;
82
83         /* Count the visible sessions for this user */
84         for (cptr = ContextList; cptr != NULL; cptr = cptr->next) {
85                 if (  (!strcasecmp(cptr->cs_inet_email, presence_jid)) 
86                    && (((cptr->cs_flags&CS_STEALTH)==0) || (aide))
87                    ) {
88                         ++visible_sessions;
89                 }
90         }
91
92         lprintf(CTDL_DEBUG, "%d sessions for <%s> are now visible to session %d\n",
93                 visible_sessions, presence_jid, CC->cs_pid);
94
95         if ( (event_type == XMPP_EVT_LOGIN) && (visible_sessions == 1) ) {
96
97                 lprintf(CTDL_DEBUG, "Telling session %d that <%s> logged in\n", CC->cs_pid, presence_jid);
98
99                 /* Do an unsolicited roster update that adds a new contact. */
100                 for (cptr = ContextList; cptr != NULL; cptr = cptr->next) {
101                         if (!strcasecmp(cptr->cs_inet_email, presence_jid)) {
102                                 cprintf("<iq id=\"unsolicited_%x\" type=\"result\">", ++unsolicited_id);
103                                 cprintf("<query xmlns=\"jabber:iq:roster\">");
104                                 jabber_roster_item(cptr);
105                                 cprintf("</query>"
106                                         "</iq>");
107                         }
108                 }
109
110                 /* Transmit presence information */
111                 cprintf("<presence type=\"available\" from=\"%s\"></presence>", presence_jid);
112         }
113
114         if (visible_sessions == 0) {
115                 lprintf(CTDL_DEBUG, "Telling session %d that <%s> logged out\n", CC->cs_pid, presence_jid);
116
117                 /* Transmit non-presence information */
118                 cprintf("<presence type=\"unavailable\" from=\"%s\"></presence>", presence_jid);
119                 cprintf("<presence type=\"unsubscribed\" from=\"%s\"></presence>", presence_jid);
120
121                 /* Do an unsolicited roster update that deletes the contact. */
122                 cprintf("<iq id=\"unsolicited_%x\" type=\"result\">", ++unsolicited_id);
123                 cprintf("<query xmlns=\"jabber:iq:roster\">");
124                 cprintf("<item jid=\"%s\" subscription=\"remove\">", presence_jid);
125                 cprintf("<group>%s</group>", config.c_humannode);
126                 cprintf("</item>");
127                 cprintf("</query>"
128                         "</iq>");
129         }
130 }
131
132
133 #endif  /* HAVE_EXPAT */