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#include "stdafx.h"
#include "dbfilter.h"
static HANDLE hDBEventPreAdd, hDBEventAdded;
static CRITICAL_SECTION RemoveChainCS={0}, *lpRemoveChainCS = &RemoveChainCS;
static UINT_PTR timerId = 0;
struct DeleteEventNode {
DeleteEventNode *next;
time_t timestamp;
HANDLE hContact;
HANDLE hDbEvent;
};
struct DeleteEventHead {
DeleteEventNode *first;
DeleteEventNode *last;
};
static DeleteEventHead DeleteEvents = {0,0};
VOID CALLBACK DeleteTimerProc(HWND hwnd, UINT uMsg, UINT_PTR idEvent, DWORD dwTime) {
if (!DeleteEvents.first) return;
EnterCriticalSection(lpRemoveChainCS);
DeleteEventNode *prev =0, *current, *next;
DBEVENTINFO info = {0};
info.cbSize = sizeof(info);
next = DeleteEvents.first;
while (current = next) {
if (difftime(time(0), current->timestamp) < 1) break;
if(!CallService(MS_DB_EVENT_GET, (WPARAM)current->hDbEvent, (LPARAM)&info)) // && info.flags&DBEF_READ)
{
CallService(MS_DB_EVENT_DELETE, (WPARAM)current->hContact, (LPARAM)current->hDbEvent);
next = current->next;
if (prev) prev->next = next;
else if (DeleteEvents.first == current) DeleteEvents.first = next;
delete current;
} else {
prev = current;
next = current->next;
}
}
if (!DeleteEvents.first) DeleteEvents.last = 0;
LeaveCriticalSection(lpRemoveChainCS);
}
// add prefix to sent messages
INT_PTR OnDatabaseEventPreAdd(WPARAM wParam, LPARAM lParam) {
if(!options.prefix_messages || !lParam) return 0;
HANDLE hContact = (HANDLE)wParam;
DBEVENTINFO *dbei = (DBEVENTINFO *)lParam;
if ((dbei->eventType != EVENTTYPE_MESSAGE) || !(dbei->flags & DBEF_SENT) || (dbei->flags & DBEF_OTR_PREFIXED))
return 0;
if(dbei->cbBlob == 0 || dbei->pBlob == 0)
return 0; // just to be safe
const char *proto = contact_get_proto(hContact);
if(!proto ) return 0;
if (DBGetContactSettingByte(hContact, proto, "ChatRoom", 0) == 1)
return 0;
if(g_metaproto && strcmp(proto, g_metaproto) == 0) {
hContact = (HANDLE)CallService(MS_MC_GETMOSTONLINECONTACT, (WPARAM)hContact, 0);
if(!hContact) return 0;
proto = contact_get_proto(hContact);
if(!proto ) return 0;
}
ConnContext *context = otrl_context_find_miranda(otr_user_state, hContact);
bool encrypted = otr_context_get_trust(context) != TRUST_NOT_PRIVATE;
if(!encrypted) return 0;
DBEVENTINFO my_dbei = *dbei; // copy the other event
char *msg = (char *)dbei->pBlob;
char *newmsg = 0;
DWORD alloclen = 0;
DWORD msglen = strlen(msg);
if (dbei->flags & DBEF_UTF) {
int prefixlen = strnlen(options.prefix, 64);
if (strncmp(msg, options.prefix, prefixlen) == 0) return 0;
alloclen = (msglen+prefixlen+1)*sizeof(char);
// get additional data
DWORD len2 = alloclen- prefixlen*sizeof(char);
int datalen = dbei->cbBlob - len2;
if (datalen < 0) datalen = 0;
newmsg = (char*)mir_alloc(alloclen);
memset(newmsg, 0, alloclen+datalen);
strncpy(newmsg, options.prefix, prefixlen);
strncat(newmsg, msg, msglen);
// append additional data
if (datalen) {
memcpy(newmsg+alloclen, msg+len2, datalen);
alloclen += datalen;
}
} else {
bool dz = false;
if(msglen < dbei->cbBlob) {
for(unsigned int i = msglen; i < dbei->cbBlob; i++) {
if(msg[i] == 0 && msg[i - 1] == 0) {
dz = true;
break;
}
}
}
if(dz) {
// yes, unicode
wchar_t* msgw = (wchar_t *)&msg[msglen];
wchar_t *prefixw = mir_utf8decodeW(options.prefix);
int prefixlenw = wcslen(prefixw);
if (wcsncmp(msgw, prefixw, prefixlenw) == 0) {
mir_free(prefixw);
return 0;
}
int msglenw = wcslen(msgw);
char *prefix = mir_utf8decodeA(options.prefix);
int prefixlen = strlen(prefix);
alloclen = (msglen+prefixlen+1)* sizeof(char) + (msglenw + prefixlenw +1) * sizeof(wchar_t);
// get additional data
DWORD len2 = (msglen+1)* sizeof(char) + (msglenw+1) * sizeof(wchar_t);
int datalen = dbei->cbBlob - len2;
if (datalen < 0) datalen = 0;
newmsg = (char*)mir_alloc(alloclen+datalen);
memset(newmsg, 0, alloclen+datalen);
strncpy(newmsg, prefix, prefixlen);
strncat(newmsg, msg, msglen);
wchar_t *p = (wchar_t*) newmsg + (msglen + prefixlen + 1) * sizeof(char);
wcsncpy(p, prefixw, prefixlenw);
wcsncat(p, msgw, msglenw);
mir_free(prefix);
mir_free(prefixw);
// append additional data
if (datalen) {
memcpy(newmsg+alloclen, msg+len2, datalen);
alloclen += datalen;
}
} else {
char *prefix = mir_utf8decodeA(options.prefix);
int prefixlen = strlen(prefix);
if (strncmp(msg, prefix, prefixlen) == 0) {
mir_free(prefix);
return 0;
}
alloclen = msglen+prefixlen+sizeof(char);
// get additional data
DWORD len2 = alloclen-prefixlen;
int datalen = dbei->cbBlob - len2;
if (datalen < 0) datalen = 0;
newmsg = (char*)mir_alloc(alloclen+datalen);
memset(newmsg, 0, alloclen+datalen);
strncpy(newmsg, prefix, prefixlen);
strncat(newmsg, msg, msglen);
mir_free(prefix);
// append additional data
if (datalen) {
memcpy(newmsg+alloclen, msg+len2, datalen);
alloclen += datalen;
}
}
}
my_dbei.pBlob = (BYTE *)newmsg;
my_dbei.cbBlob = alloclen;
my_dbei.flags |= DBEF_OTR_PREFIXED;
CallService(MS_DB_EVENT_ADD, wParam, (LPARAM)&my_dbei);
if (newmsg) mir_free(newmsg);
// stop original event from being added
return 1;
}
INT_PTR OnDatabaseEventAdded(WPARAM wParam, LPARAM lParam) {
if(!options.no_history) return 0;
DBEVENTINFO info = {0};
info.cbSize = sizeof(info);
static char* prefixutf = mir_utf8encodeT(TranslateT(LANG_INLINE_PREFIX));
static char* prefix = Translate(LANG_INLINE_PREFIX);
static DWORD lenutf = strlen(prefixutf);
static DWORD len = strlen(prefix);
info.cbBlob = lenutf*2;
info.pBlob = (PBYTE)mir_alloc(info.cbBlob);
if(!CallService(MS_DB_EVENT_GET, (WPARAM)lParam, (LPARAM)&info)) {
if(info.eventType == EVENTTYPE_MESSAGE) {
HANDLE hContact = (HANDLE)wParam;
ConnContext *context = otrl_context_find_miranda(otr_user_state, hContact);
if (context && otr_context_get_trust(context) != TRUST_NOT_PRIVATE
&& ( (info.flags&DBEF_UTF && !(info.cbBlob >lenutf && 0==strncmp((char*)info.pBlob, prefixutf, lenutf)))
|| (!(info.flags&DBEF_UTF) && !(info.cbBlob >len && 0==strncmp((char*)info.pBlob, prefix, len)))
)
) // only delete encrypted messages that are no OTR system messages
{
DeleteEventNode *node = new DeleteEventNode();
node->hContact = hContact;
node->hDbEvent = (HANDLE) lParam;
node->timestamp = time(0);
node->next = 0;
EnterCriticalSection(lpRemoveChainCS);
if (DeleteEvents.last)
DeleteEvents.last->next = node;
else
DeleteEvents.first = node;
DeleteEvents.last = node;
LeaveCriticalSection(lpRemoveChainCS);
}
}
}
mir_free(prefixutf);
mir_free(info.pBlob);
return 0;
}
void InitDBFilter() {
InitializeCriticalSectionAndSpinCount(lpRemoveChainCS, 500);
hDBEventPreAdd = HookEvent(ME_DB_EVENT_FILTER_ADD, OnDatabaseEventPreAdd);
hDBEventAdded = HookEvent(ME_DB_EVENT_ADDED, OnDatabaseEventAdded);
timerId = SetTimer(0, 0, 1000, DeleteTimerProc);
}
void DeinitDBFilter() {
UnhookEvent(hDBEventPreAdd);
hDBEventPreAdd = 0;
UnhookEvent(hDBEventAdded);
hDBEventAdded = 0;
if (timerId) KillTimer(0, timerId);
DeleteTimerProc(0,0,0,0);
DeleteCriticalSection(lpRemoveChainCS);
}
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