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/*
* 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.
*
* Jabber
* Copyright (C) 1998-1999 The Jabber Team http://jabber.org/
*/
#include "jabber.h"
/* these aren't the most efficient things in the world, a hash optimized for tiny spaces would be far better */
ppdb _ppdb_new(pool p, jid id)
{
ppdb ret;
ret = pmalloc(p,sizeof(_ppdb));
ret->p = p;
ret->pri = -1;
ret->next = NULL;
ret->user = NULL;
ret->x = NULL;
ret->id = jid_new(p,jid_full(id));
return ret;
}
ppdb _ppdb_get(ppdb db, jid id)
{
ppdb cur;
if(db == NULL || id == NULL) return NULL;
for(cur = db->next; cur != NULL; cur = cur->next)
if(jid_cmp(cur->id,id) == 0) return cur;
return NULL;
}
ppdb ppdb_insert(ppdb db, jid id, xmlnode x)
{
char *res;
ppdb cur, curu;
pool p;
if(id == NULL || id->server == NULL || x == NULL)
return db;
/* new ppdb list dummy holder */
if(db == NULL)
{
p = pool_heap(1024);
db = _ppdb_new(p,id);
}
cur = _ppdb_get(db,id);
/* just update it */
if(cur != NULL)
{
xmlnode_free(cur->x);
cur->x = xmlnode_dup(x);
cur->pri = jutil_priority(x);
return db;
}
/* make an entry for it */
cur = _ppdb_new(db->p,id);
cur->x = xmlnode_dup(x);
cur->pri = jutil_priority(x);
cur->next = db->next;
db->next = cur;
/* this is a presence from a resource, make an entry for just the user */
if(id->user != NULL && id->resource != NULL)
{
/* modify the id to just user@host */
res = id->resource;
jid_set(id,NULL,JID_RESOURCE);
curu = _ppdb_get(db,id);
/* no user entry, make one */
if(curu == NULL)
{
curu = _ppdb_new(db->p,id);
curu->next = db->next;
db->next = curu;
}
/* restore the id */
jid_set(id,res,JID_RESOURCE);
/* insert this resource into the user list */
cur->user = curu->user;
curu->user = cur;
}
return db;
}
xmlnode ppdb_primary(ppdb db, jid id)
{
ppdb cur, top;
if(db == NULL || id == NULL) return NULL;
cur = _ppdb_get(db,id);
if(cur == NULL) return NULL;
/* not user@host check, just return */
if(id->user == NULL || id->resource != NULL) return cur->x;
top = cur;
for(cur = cur->user; cur != NULL; cur = cur->user)
if(cur->pri >= top->pri) top = cur;
if(top != NULL && top->pri >= 0) return top->x;
return NULL;
}
/* return the presence for the id, successive calls return all of the known resources for a user@host address */
xmlnode ppdb_get(ppdb db, jid id)
{
static ppdb last = NULL;
ppdb cur;
if(db == NULL || id == NULL) return NULL;
/* MODE: if this is NOT just user@host addy, return just the single entry */
if(id->user == NULL || id->resource != NULL)
{
/* we were just here, return now */
if(last != NULL)
{
last = NULL;
return NULL;
}
last = _ppdb_get(db,id);
if(last != NULL)
return last->x;
else
return NULL;
}
/* handle looping for user@host */
/* we're already in the loop */
if(last != NULL)
{
/* this is the last entry in the list */
if(last->user == NULL)
{
last = NULL;
return NULL;
}
last = last->user;
return last->x;
}
/* start a new loop */
cur = _ppdb_get(db,id);
if(cur == NULL) return NULL;
last = cur->user;
if(last != NULL)
return last->x;
else
return NULL;
}
void ppdb_free(ppdb db)
{
ppdb cur;
if(db == NULL) return;
for(cur = db; cur != NULL; cur = cur->next)
xmlnode_free(cur->x);
pool_free(db->p);
}
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