citadel/modules/jabber/xmpp_queue.c

   1 /*
   2  * $Id$
   3  *
   4  * XMPP event queue
   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 void xmpp_queue_event(int event_type, char *email_addr) {
  53
  54         static int seq = 0;
  55         struct xmpp_event *xptr = NULL;
  56         struct xmpp_event *new_event = NULL;
  57         struct xmpp_event *last = NULL;
  58         int purged_something = 0;
  59         struct CitContext *cptr;
  60
  61         lprintf(CTDL_DEBUG, "xmpp_queue_event(%d, %s)\n", event_type, email_addr);
  62
  63         /* Purge events more than a minute old */
  64         begin_critical_section(S_XMPP_QUEUE);
  65         do {
  66                 purged_something = 0;
  67                 if (xmpp_queue != NULL) {
  68                         if ((time(NULL) - xmpp_queue->event_time) > 60) {
  69                                 xptr = xmpp_queue->next;
  70                                 free(xmpp_queue);
  71                                 xmpp_queue = xptr;
  72                                 purged_something = 1;
  73                         }
  74                 }
  75         } while(purged_something);
  76         end_critical_section(S_XMPP_QUEUE);
  77
  78         /* Create a new event */
  79         new_event = (struct xmpp_event *) malloc(sizeof(struct xmpp_event));
  80         new_event->next = NULL;
  81         new_event->event_time = time(NULL);
  82         new_event->event_seq = ++seq;
  83         new_event->event_type = event_type;
  84         new_event->session_which_generated_this_event = CC->cs_pid;
  85         safestrncpy(new_event->event_jid, email_addr, sizeof new_event->event_jid);
  86
  87         /* Add it to the list */
  88         begin_critical_section(S_XMPP_QUEUE);
  89         if (xmpp_queue == NULL) {
  90                 xmpp_queue = new_event;
  91         }
  92         else {
  93                 for (xptr = xmpp_queue; xptr != NULL; xptr = xptr->next) {
  94                         if (xptr->next == NULL) {
  95                                 last = xptr;
  96                         }
  97                 }
  98                 last->next = new_event;
  99         }
 100         end_critical_section(S_XMPP_QUEUE);
 101
 102         /* Tell the sessions that something is happening */
 103         for (cptr = ContextList; cptr != NULL; cptr = cptr->next) {
 104                 if (cptr->h_async_function == xmpp_async_loop) {
 105                         cptr->async_waiting = 1;
 106                 }
 107         }
 108 }
 109
 110
 111 /*
 112  * Are we interested in anything from the queue?  (Called in async loop)
 113  */
 114 void xmpp_process_events(void) {
 115         struct xmpp_event *xptr = NULL;
 116         int highest_event = 0;
 117
 118         for (xptr=xmpp_queue; xptr!=NULL; xptr=xptr->next) {
 119                 if (xptr->event_seq > XMPP->last_event_processed) {
 120
 121                         switch(xptr->event_type) {
 122
 123                                 case XMPP_EVT_LOGIN:
 124                                         if (xptr->session_which_generated_this_event != CC->cs_pid) {
 125                                                 xmpp_presence_notify(xptr->event_jid, "available");
 126                                         }
 127                                         break;
 128
 129                                 case XMPP_EVT_LOGOUT:
 130                                         if (xptr->session_which_generated_this_event != CC->cs_pid) {
 131                                                 xmpp_presence_notify(xptr->event_jid, "unavailable");
 132                                         }
 133                                         break;
 134
 135                         }
 136
 137                         if (xptr->event_seq > highest_event) {
 138                                 highest_event = xptr->event_seq;
 139                         }
 140                 }
 141         }
 142
 143         XMPP->last_event_processed = highest_event;
 144 }
 145
 146
 147 #endif  /* HAVE_EXPAT */