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/*
Miranda IM: the free IM client for Microsoft* Windows*
Copyright 2000-2008 Miranda ICQ/IM 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.
*/
/*
* Author Artem Shpynov aka FYR
* Copyright 2000-2008 Artem Shpynov
*/
//////////////////////////////////////////////////////////////////////////
// Module to Request Away Messages
#include "hdr/modern_commonheaders.h"
#include "hdr/modern_awaymsg.h"
#include "newpluginapi.h"
#include "hdr/modern_sync.h"
#define AMASKPERIOD 3000
#define amlock EnterCriticalSection(&amLockChain)
#define amunlock LeaveCriticalSection(&amLockChain)
typedef struct _tag_amChainItem {
HANDLE hContact;
_tag_amChainItem *Next;
} AMCHAINITEM;
static AMCHAINITEM * amFirstChainItem = NULL;
static AMCHAINITEM * amLastChainItem = NULL;
static CRITICAL_SECTION amLockChain;
static HANDLE hamProcessEvent = NULL;
static DWORD amRequestTick = 0;
static int amAddHandleToChain(HANDLE hContact);
static HANDLE amGetCurrentChain();
/*
* Add contact handle to requests queue
*/
static int amAddHandleToChain(HANDLE hContact)
{
AMCHAINITEM * workChain;
amlock;
{
//check that handle is present
AMCHAINITEM * wChain;
wChain = amFirstChainItem;
if (wChain)
do {
if (wChain->hContact == hContact)
{
amunlock;
return 0;
}
} while(wChain = (AMCHAINITEM *)wChain->Next);
}
if ( !amFirstChainItem)
{
amFirstChainItem = (AMCHAINITEM*)malloc(sizeof(AMCHAINITEM));
workChain = amFirstChainItem;
}
else
{
amLastChainItem->Next = (AMCHAINITEM*)malloc(sizeof(AMCHAINITEM));
workChain = (AMCHAINITEM *)amLastChainItem->Next;
}
amLastChainItem = workChain;
workChain->Next = NULL;
workChain->hContact = hContact;
amunlock;
SetEvent(hamProcessEvent);
return 1;
}
/*
* Gets handle from queue for request
*/
static HANDLE amGetCurrentChain()
{
AMCHAINITEM * workChain;
HANDLE res = NULL;
amlock;
if (amFirstChainItem)
{
res = amFirstChainItem->hContact;
workChain = amFirstChainItem->Next;
free(amFirstChainItem);
amFirstChainItem = (AMCHAINITEM *)workChain;
}
amunlock;
return res;
}
/*
* Tread sub to ask protocol to retrieve away message
*/
static unsigned __stdcall amThreadProc(void *)
{
DWORD time;
HANDLE hContact;
HANDLE ACK = 0;
ClcCacheEntry dnce;
memset( &dnce, 0, sizeof(dnce));
while (!MirandaExiting())
{
hContact = amGetCurrentChain();
while (hContact) {
time = GetTickCount();
if ((time-amRequestTick) < AMASKPERIOD) {
SleepEx(AMASKPERIOD-(time-amRequestTick)+10, TRUE);
if (MirandaExiting()) {
g_dwAwayMsgThreadID = 0;
return 0;
}
}
CListSettings_FreeCacheItemData(&dnce);
dnce.hContact = (HANDLE)hContact;
Sync(CLUI_SyncGetPDNCE, (WPARAM) 0, (LPARAM)&dnce);
if (dnce.ApparentMode != ID_STATUS_OFFLINE) //don't ask if contact is always invisible (should be done with protocol)
ACK = (HANDLE)CallContactService(hContact,PSS_GETAWAYMSG, 0, 0);
if ( !ACK) {
ACKDATA ack;
ack.hContact = hContact;
ack.type = ACKTYPE_AWAYMSG;
ack.result = ACKRESULT_FAILED;
if (dnce.m_cache_cszProto)
ack.szModule = dnce.m_cache_cszProto;
else
ack.szModule = NULL;
ClcDoProtoAck(hContact, &ack);
}
CListSettings_FreeCacheItemData(&dnce);
amRequestTick = time;
hContact = amGetCurrentChain();
if (hContact) {
DWORD i=0;
do {
i++;
SleepEx(50, TRUE);
}
while (i < AMASKPERIOD/50 && !MirandaExiting());
}
else break;
if (MirandaExiting()) {
g_dwAwayMsgThreadID = 0;
return 0;
}
}
WaitForSingleObjectEx(hamProcessEvent, INFINITE, TRUE);
ResetEvent(hamProcessEvent);
if (MirandaExiting())
{
g_dwAwayMsgThreadID = 0;
return 0;
}
}
g_dwAwayMsgThreadID = 0;
return 1;
}
BOOL amWakeThread()
{
if (hamProcessEvent && g_dwAwayMsgThreadID) {
SetEvent(hamProcessEvent);
return TRUE;
}
return FALSE;
}
/*
* Sub to be called outside on status changing to retrieve away message
*/
void amRequestAwayMsg(HANDLE hContact)
{
char *szProto;
if ( !g_CluiData.bInternalAwayMsgDiscovery || !hContact)
return;
//Do not re-ask for chat rooms
szProto = GetContactProto(hContact);
if (szProto == NULL || db_get_b(hContact, szProto, "ChatRoom", 0) != 0)
return;
amAddHandleToChain(hContact);
}
void InitAwayMsgModule()
{
InitializeCriticalSection(&amLockChain);
hamProcessEvent = CreateEvent(NULL,FALSE,FALSE,NULL);
mir_forkthreadex(amThreadProc, 0, &g_dwAwayMsgThreadID);
}
void UninitAwayMsgModule()
{
SetEvent(hamProcessEvent);
while (g_dwAwayMsgThreadID)
SleepEx(50, TRUE);
CloseHandle(hamProcessEvent);
DeleteCriticalSection(&amLockChain);
}
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