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/*
Miranda NG: the free IM client for Microsoft* Windows*
Copyright 2012 Miranda NG project,
all portions of this codebase are copyrighted to the people
listed in contributors.txt.
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 "commonheaders.h"
int CDb3Base::CheckProto(HANDLE hContact, const char *proto)
{
char protobuf[MAX_PATH] = {0};
DBVARIANT dbv;
DBCONTACTGETSETTING sVal = { "Protocol", "p", &dbv };
dbv.type = DBVT_ASCIIZ;
dbv.pszVal = protobuf;
dbv.cchVal = sizeof(protobuf);
if ( GetContactSettingStatic(hContact, &sVal) != 0 || (dbv.type != DBVT_ASCIIZ))
return 0;
return !strcmp(protobuf, proto);
}
STDMETHODIMP_(LONG) CDb3Base::GetContactCount(void)
{
mir_cslock lck(m_csDbAccess);
return m_dbHeader.contactCount;
}
STDMETHODIMP_(HANDLE) CDb3Base::FindFirstContact(const char *szProto)
{
mir_cslock lck(m_csDbAccess);
HANDLE ret = (HANDLE)m_dbHeader.ofsFirstContact;
if (szProto && !CheckProto(ret, szProto))
ret = FindNextContact(ret, szProto);
return ret;
}
STDMETHODIMP_(HANDLE) CDb3Base::FindNextContact(HANDLE hContact, const char *szProto)
{
mir_cslock lck(m_csDbAccess);
while (hContact) {
DBCachedContact *VL = m_cache->GetCachedContact(hContact);
if (VL != NULL) {
if (VL->hNext != NULL) {
if (!szProto || CheckProto(VL->hNext, szProto))
return VL->hNext;
hContact = VL->hNext;
continue;
} }
DBContact *dbc = (DBContact*)DBRead(hContact, sizeof(DBContact), NULL);
if (dbc->signature != DBCONTACT_SIGNATURE)
break;
if (VL == NULL)
VL = m_cache->AddContactToCache(hContact);
VL->hNext = (HANDLE)dbc->ofsNext;
if (VL->hNext != NULL && (!szProto || CheckProto(VL->hNext, szProto)))
return VL->hNext;
hContact = VL->hNext;
}
return NULL;
}
STDMETHODIMP_(LONG) CDb3Base::DeleteContact(HANDLE hContact)
{
if (hContact == NULL)
return 1;
mir_cslockfull lck(m_csDbAccess);
DBContact *dbc = (DBContact*)DBRead(hContact, sizeof(DBContact), NULL);
if (dbc->signature != DBCONTACT_SIGNATURE)
return 1;
if (hContact == (HANDLE)m_dbHeader.ofsUser) {
log0("FATAL: del of user chain attempted.");
return 1;
}
lck.unlock();
log0("del contact");
// call notifier while outside mutex
NotifyEventHooks(hContactDeletedEvent, (WPARAM)hContact, 0);
// get back in
lck.lock();
m_cache->FreeCachedContact(hContact);
if (hContact == m_hLastCachedContact)
m_hLastCachedContact = NULL;
dbc = (DBContact*)DBRead(hContact, sizeof(DBContact), NULL);
//delete settings chain
DWORD ofsThis = dbc->ofsFirstSettings;
DWORD ofsFirstEvent = dbc->ofsFirstEvent;
while (ofsThis) {
DBContactSettings *dbcs = (DBContactSettings*)DBRead(ofsThis,sizeof(DBContactSettings),NULL);
DWORD ofsNext = dbcs->ofsNext;
DeleteSpace(ofsThis,offsetof(DBContactSettings,blob)+dbcs->cbBlob);
ofsThis = ofsNext;
}
//delete event chain
ofsThis = ofsFirstEvent;
while (ofsThis) {
DBEvent *dbe = (DBEvent*)DBRead(ofsThis,sizeof(DBEvent),NULL);
DWORD ofsNext = dbe->ofsNext;
DeleteSpace(ofsThis,offsetof(DBEvent,blob)+dbe->cbBlob);
ofsThis = ofsNext;
}
//find previous contact in chain and change ofsNext
dbc = (DBContact*)DBRead(hContact, sizeof(DBContact), NULL);
if (m_dbHeader.ofsFirstContact == (DWORD)hContact) {
m_dbHeader.ofsFirstContact = dbc->ofsNext;
DBWrite(0,&m_dbHeader,sizeof(m_dbHeader));
}
else {
DWORD ofsNext = dbc->ofsNext;
ofsThis = m_dbHeader.ofsFirstContact;
DBContact *dbcPrev = (DBContact*)DBRead(ofsThis,sizeof(DBContact),NULL);
while (dbcPrev->ofsNext != (DWORD)hContact) {
if (dbcPrev->ofsNext == 0) DatabaseCorruption(NULL);
ofsThis = dbcPrev->ofsNext;
dbcPrev = (DBContact*)DBRead(ofsThis,sizeof(DBContact),NULL);
}
dbcPrev->ofsNext = ofsNext;
DBWrite(ofsThis,dbcPrev,sizeof(DBContact));
DBCachedContact *VL = m_cache->GetCachedContact((HANDLE)ofsThis);
if (VL)
VL->hNext = (HANDLE)ofsNext;
}
//delete contact
DeleteSpace((DWORD)hContact, sizeof(DBContact));
//decrement contact count
m_dbHeader.contactCount--;
DBWrite(0,&m_dbHeader,sizeof(m_dbHeader));
DBFlush(0);
return 0;
}
STDMETHODIMP_(HANDLE) CDb3Base::AddContact()
{
DWORD ofsNew;
log0("add contact");
{
mir_cslock lck(m_csDbAccess);
ofsNew = CreateNewSpace(sizeof(DBContact));
DBContact dbc = { 0 };
dbc.signature = DBCONTACT_SIGNATURE;
dbc.ofsNext = m_dbHeader.ofsFirstContact;
m_dbHeader.ofsFirstContact = ofsNew;
m_dbHeader.contactCount++;
DBWrite(ofsNew,&dbc,sizeof(DBContact));
DBWrite(0,&m_dbHeader,sizeof(m_dbHeader));
DBFlush(0);
}
m_cache->AddContactToCache((HANDLE)ofsNew);
NotifyEventHooks(hContactAddedEvent,(WPARAM)ofsNew,0);
return (HANDLE)ofsNew;
}
STDMETHODIMP_(BOOL) CDb3Base::IsDbContact(HANDLE hContact)
{
if (m_cache->GetCachedContact(hContact))
return TRUE;
mir_cslock lck(m_csDbAccess);
DBContact *dbc = (DBContact*)DBRead(hContact,sizeof(DBContact),NULL);
if (dbc->signature == DBCONTACT_SIGNATURE) {
m_cache->AddContactToCache(hContact);
return TRUE;
}
return FALSE;
}
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