/*

Jabber Protocol Plugin for Miranda NG

Copyright (c) 2002-04  Santithorn Bunchua
Copyright (c) 2005-12  George Hazan
Copyright (c) 2012-14  Miranda NG project

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 "jabber.h"

#include "jabber_caps.h"

int CJabberProto::SerialNext(void)
{
	return ::InterlockedIncrement(&m_nSerial);
}

///////////////////////////////////////////////////////////////////////////////
// JabberChatRoomHContactFromJID - looks for the char room MCONTACT with required JID

MCONTACT CJabberProto::ChatRoomHContactFromJID(const TCHAR *jid)
{
	if (jid == NULL)
		return NULL;

	for (MCONTACT hContact = db_find_first(m_szModuleName); hContact; hContact = db_find_next(hContact, m_szModuleName)) {
		ptrT dbJid( getTStringA(hContact, "ChatRoomID"));
		if (dbJid == NULL)
			if ((dbJid = getTStringA(hContact, "jid")) == NULL)
				continue;

		if (!lstrcmpi(jid, dbJid) && isChatRoom(hContact))
			return hContact;
	}

	return NULL;
}

///////////////////////////////////////////////////////////////////////////////
// JabberHContactFromJID - looks for the MCONTACT with required JID

MCONTACT CJabberProto::HContactFromJID(const TCHAR *jid, BOOL bStripResource)
{
	if (jid == NULL)
		return NULL;

	JABBER_LIST_ITEM *item = ListGetItemPtr(LIST_CHATROOM, jid);

	for (MCONTACT hContact = db_find_first(m_szModuleName); hContact; hContact = db_find_next(hContact, m_szModuleName)) {
		bool bIsChat = isChatRoom(hContact);

		ptrT dbJid( getTStringA(hContact, bIsChat ? "ChatRoomID" : "jid"));
		if (dbJid != NULL) {
			int result;
			if (item != NULL)
				result = lstrcmpi(jid, dbJid);
			else {
				if (bStripResource == 3) {
					if (bIsChat)
						result = lstrcmpi(jid, dbJid);  // for chat room we have to have full contact matched
					else if (TRUE)
						result = _tcsnicmp(jid, dbJid, _tcslen(dbJid));
					else
						result = JabberCompareJids(jid, dbJid);
				}
				// most probably it should just look full matching contact
				else
					result = lstrcmpi(jid, dbJid);
			}

			if (result == 0)
				return hContact;
		}
	}

	return NULL;
}

TCHAR* __stdcall JabberNickFromJID(const TCHAR *jid)
{
	if (jid == NULL)
		return mir_tstrdup(_T(""));

	const TCHAR *p;
	TCHAR *nick;

	if ((p = _tcschr(jid, '@')) == NULL)
		p = _tcschr(jid, '/');

	if (p != NULL) {
		if ((nick=(TCHAR*)mir_alloc(sizeof(TCHAR)*(int(p-jid)+1))) != NULL) {
			_tcsncpy(nick, jid, p-jid);
			nick[p-jid] = '\0';
		}
	}
	else nick = mir_tstrdup(jid);
	return nick;
}

pResourceStatus CJabberProto::ResourceInfoFromJID(const TCHAR *jid)
{
	if (jid == NULL)
		return NULL;

	JABBER_LIST_ITEM *item = ListGetItemPtr(LIST_VCARD_TEMP, jid);
	if (item == NULL)
		item = ListGetItemPtr(LIST_ROSTER, jid);
	if (item == NULL)
		return NULL;

	const TCHAR *p = _tcschr(jid, '/');
	if (p == NULL)
		return item->getTemp();

	return item->findResource(p+1);
}

TCHAR* JabberPrepareJid(LPCTSTR jid)
{
	if (jid == NULL) return NULL;
	TCHAR *szNewJid = mir_tstrdup(jid);
	if (!szNewJid) return NULL;
	TCHAR *pDelimiter = _tcschr(szNewJid, _T('/'));
	if (pDelimiter) *pDelimiter = 0;
	CharLower(szNewJid);
	if (pDelimiter) *pDelimiter = _T('/');
	return szNewJid;
}

void strdel(char* parBuffer, int len)
{
	char* p;
	for (p = parBuffer+len; *p != 0; p++)
		p[ -len ] = *p;

	p[ -len ] = '\0';
}

char* __stdcall JabberUrlDecode(char *str)
{
	char* p, *q;

	if (str == NULL)
		return NULL;

	for (p=q=str; *p!='\0'; p++,q++) {
		if (*p == '<') {
			// skip CDATA
			if (!strncmp(p, "<![CDATA[", 9)) {
				p += 9;
				char *tail = strstr(p, "]]>");
				size_t count = tail ? (tail-p) : strlen(p);
				memmove(q, p, count);
				q += count-1;
				p = (tail ? (tail+3) : (p+count)) - 1;
			}
			else *q = *p;
		}
		else if (*p == '&') {
			if (!strncmp(p, "&amp;", 5)) {	*q = '&'; p += 4; }
			else if (!strncmp(p, "&apos;", 6)) { *q = '\''; p += 5; }
			else if (!strncmp(p, "&gt;", 4)) { *q = '>'; p += 3; }
			else if (!strncmp(p, "&lt;", 4)) { *q = '<'; p += 3; }
			else if (!strncmp(p, "&quot;", 6)) { *q = '"'; p += 5; }
			else { *q = *p;	}
		}
		else *q = *p;
	}
	*q = '\0';
	return str;
}

void __stdcall JabberUrlDecodeW(WCHAR *str)
{
	if (str == NULL)
		return;

	WCHAR *p, *q;
	for (p=q=str; *p!='\0'; p++,q++) {
		if (*p == '&') {
			if (!wcsncmp(p, L"&amp;", 5)) {	*q = '&'; p += 4; }
			else if (!wcsncmp(p, L"&apos;", 6)) { *q = '\''; p += 5; }
			else if (!wcsncmp(p, L"&gt;", 4)) { *q = '>'; p += 3; }
			else if (!wcsncmp(p, L"&lt;", 4)) { *q = '<'; p += 3; }
			else if (!wcsncmp(p, L"&quot;", 6)) { *q = '"'; p += 5; }
			else { *q = *p;	}
		}
		else {
			*q = *p;
		}
	}
	*q = '\0';
}

char* __stdcall JabberUrlEncode(const char *str)
{
	char* s, *p, *q;
	int c;

	if (str == NULL)
		return NULL;

	for (c=0,p=(char*)str; *p != '\0'; p++) {
		switch (*p) {
			case '&': c += 5; break;
			case '\'': c += 6; break;
			case '>': c += 4; break;
			case '<': c += 4; break;
			case '"': c += 6; break;
			default: c++; break;
		}
	}
	if ((s=(char*)mir_alloc(c+1)) != NULL) {
		for (p=(char*)str,q=s; *p!='\0'; p++) {
			switch (*p) {
			case '&': strcpy(q, "&amp;"); q += 5; break;
			case '\'': strcpy(q, "&apos;"); q += 6; break;
			case '>': strcpy(q, "&gt;"); q += 4; break;
			case '<': strcpy(q, "&lt;"); q += 4; break;
			case '"': strcpy(q, "&quot;"); q += 6; break;
			default:
				if (*p > 0 && *p < 32) {
					switch(*p) {
					case '\r':
					case '\n':
					case '\t':
						*q = *p;
						break;
					default:
						*q = '?';
					}
				}
				else *q = *p;
				q++;
				break;
			}
		}
		*q = '\0';
	}

	return s;
}

void __stdcall JabberUtfToTchar(const char *pszValue, size_t cbLen, LPTSTR &dest)
{
	char* pszCopy = NULL;
	bool  bNeedsFree = false;
	__try
	{
		// this code can cause access violation when a stack overflow occurs
		pszCopy = (char*)alloca(cbLen+1);
	}
	__except(EXCEPTION_EXECUTE_HANDLER)
	{
		bNeedsFree = true;
		pszCopy = (char*)malloc(cbLen+1);
	}
	if (pszCopy == NULL)
		return;

	memcpy(pszCopy, pszValue, cbLen);
	pszCopy[ cbLen ] = 0;

	JabberUrlDecode(pszCopy);

	mir_utf8decode(pszCopy, &dest);

	if (bNeedsFree)
		free(pszCopy);
}

char* __stdcall JabberSha1(char* str)
{
	if (str == NULL)
		return NULL;

	BYTE digest[MIR_SHA1_HASH_SIZE];
	mir_sha1_ctx sha;
	mir_sha1_init(&sha);
	mir_sha1_append(&sha, (BYTE*)str, (int)strlen(str));
	mir_sha1_finish(&sha, digest);

	char *result = (char*)mir_alloc(41);
	if (result)
		bin2hex(digest, sizeof(digest), result);
	return result;
}

TCHAR* __stdcall JabberStrFixLines(const TCHAR *str)
{
	if (str == NULL)
		return NULL;

	const TCHAR *p;
	int add = 0;
	bool prev_r = false;
	bool prev_n = false;

	for (p = str; p && *p; ++p)
		if (*p == _T('\r') || *p == _T('\n'))
			++add;

	TCHAR *buf = (TCHAR *)mir_alloc((lstrlen(str) + add + 1) * sizeof(TCHAR));
	TCHAR *res = buf;

	for (p = str; p && *p; ++p) {
		if (*p == _T('\n') && !prev_r)
			*res++ = _T('\r');
		if (*p != _T('\r') && *p != _T('\n') && prev_r)
			*res++ = _T('\n');
		*res++ = *p;
		prev_r = *p == _T('\r');
		prev_n = *p == _T('\n');
	}
	*res = 0;

	return buf;
}

char* __stdcall JabberUnixToDos(const char* str)
{
	char* p, *q, *res;
	int extra;

	if (str == NULL || str[0]=='\0')
		return NULL;

	extra = 0;
	for (p=(char*)str; *p!='\0'; p++) {
		if (*p == '\n')
			extra++;
	}
	if ((res=(char*)mir_alloc(strlen(str)+extra+1)) != NULL) {
		for (p=(char*)str,q=res; *p!='\0'; p++,q++) {
			if (*p == '\n') {
				*q = '\r';
				q++;
			}
			*q = *p;
		}
		*q = '\0';
	}
	return res;
}

WCHAR* __stdcall JabberUnixToDosW(const WCHAR* str)
{
	if (str == NULL || str[0]=='\0')
		return NULL;

	const WCHAR* p;
	WCHAR* q, *res;
	int extra = 0;

	for (p = str; *p!='\0'; p++)
		if (*p == '\n')
			extra++;

	if ((res = (WCHAR*)mir_alloc(sizeof(WCHAR)*(wcslen(str) + extra + 1))) != NULL) {
		for (p = str,q=res; *p!='\0'; p++,q++) {
			if (*p == '\n') {
				*q = '\r';
				q++;
			}
			*q = *p;
		}
		*q = '\0';
	}
	return res;
}

void __stdcall JabberHttpUrlDecode(TCHAR *str)
{
	TCHAR *p, *q;
	unsigned int code;

	if (str == NULL) return;
	for (p = q = (TCHAR*)str; *p!='\0'; p++,q++) {
		if (*p=='%' && *(p+1)!='\0' && isxdigit(*(p+1)) && *(p+2)!='\0' && isxdigit(*(p+2))) {
			_stscanf((TCHAR*)p+1, _T("%2x"), &code);
			*q = (unsigned char) code;
			p += 2;
		}
		else *q = *p;
	}

	*q = '\0';
}

int __stdcall JabberCombineStatus(int status1, int status2)
{
	// Combine according to the following priority (high to low)
	// ID_STATUS_FREECHAT
	// ID_STATUS_ONLINE
	// ID_STATUS_DND
	// ID_STATUS_AWAY
	// ID_STATUS_NA
	// ID_STATUS_INVISIBLE (valid only for TLEN_PLUGIN)
	// ID_STATUS_OFFLINE
	// other ID_STATUS in random order (actually return status1)
	if (status1==ID_STATUS_FREECHAT || status2==ID_STATUS_FREECHAT)
		return ID_STATUS_FREECHAT;
	if (status1==ID_STATUS_ONLINE || status2==ID_STATUS_ONLINE)
		return ID_STATUS_ONLINE;
	if (status1==ID_STATUS_DND || status2==ID_STATUS_DND)
		return ID_STATUS_DND;
	if (status1==ID_STATUS_AWAY || status2==ID_STATUS_AWAY)
		return ID_STATUS_AWAY;
	if (status1==ID_STATUS_NA || status2==ID_STATUS_NA)
		return ID_STATUS_NA;
	if (status1==ID_STATUS_INVISIBLE || status2==ID_STATUS_INVISIBLE)
		return ID_STATUS_INVISIBLE;
	if (status1==ID_STATUS_OFFLINE || status2==ID_STATUS_OFFLINE)
		return ID_STATUS_OFFLINE;
	return status1;
}

struct tagErrorCodeToStr {
	int code;
	TCHAR *str;
}
static JabberErrorCodeToStrMapping[] = {
	{ JABBER_ERROR_REDIRECT,               LPGENT("Redirect") },
	{ JABBER_ERROR_BAD_REQUEST,            LPGENT("Bad request") },
	{ JABBER_ERROR_UNAUTHORIZED,           LPGENT("Unauthorized") },
	{ JABBER_ERROR_PAYMENT_REQUIRED,       LPGENT("Payment required") },
	{ JABBER_ERROR_FORBIDDEN,              LPGENT("Forbidden") },
	{ JABBER_ERROR_NOT_FOUND,              LPGENT("Not found") },
	{ JABBER_ERROR_NOT_ALLOWED,            LPGENT("Not allowed") },
	{ JABBER_ERROR_NOT_ACCEPTABLE,         LPGENT("Not acceptable") },
	{ JABBER_ERROR_REGISTRATION_REQUIRED,  LPGENT("Registration required") },
	{ JABBER_ERROR_REQUEST_TIMEOUT,        LPGENT("Request timeout") },
	{ JABBER_ERROR_CONFLICT,               LPGENT("Conflict") },
	{ JABBER_ERROR_INTERNAL_SERVER_ERROR,  LPGENT("Internal server error") },
	{ JABBER_ERROR_NOT_IMPLEMENTED,        LPGENT("Not implemented") },
	{ JABBER_ERROR_REMOTE_SERVER_ERROR,    LPGENT("Remote server error") },
	{ JABBER_ERROR_SERVICE_UNAVAILABLE,    LPGENT("Service unavailable") },
	{ JABBER_ERROR_REMOTE_SERVER_TIMEOUT,  LPGENT("Remote server timeout") },
	{ -1,                                  LPGENT("Unknown error") }
};

TCHAR* __stdcall JabberErrorStr(int errorCode)
{
	int i;

	for (i=0; JabberErrorCodeToStrMapping[i].code!=-1 && JabberErrorCodeToStrMapping[i].code!=errorCode; i++);
	return JabberErrorCodeToStrMapping[i].str;
}

TCHAR* __stdcall JabberErrorMsg(HXML errorNode, int* pErrorCode)
{
	TCHAR *errorStr = (TCHAR*)mir_alloc(256 * sizeof(TCHAR));
	if (errorNode == NULL) {
		if (pErrorCode)
			*pErrorCode = -1;
		mir_sntprintf(errorStr, 256, _T("%s -1: %s"), TranslateT("Error"), TranslateT("Unknown error message"));
		return errorStr;
	}

	int errorCode = -1;
	const TCHAR *str = xmlGetAttrValue(errorNode, _T("code"));
	if (str != NULL)
		errorCode = _ttoi(str);

	str = xmlGetText(errorNode);
	if (str == NULL)
		str = xmlGetText(xmlGetChild(errorNode, _T("text")));
	if (str == NULL) {
		for (int i=0; ; i++) {
			HXML c = xmlGetChild(errorNode, i);
			if (c == NULL) break;
			const TCHAR *attr = xmlGetAttrValue(c, _T("xmlns"));
			if (attr && !_tcscmp(attr, _T("urn:ietf:params:xml:ns:xmpp-stanzas"))) {
				str = xmlGetName(c);
				break;
			}
		}
	}

	if (str != NULL)
		mir_sntprintf(errorStr, 256, _T("%s %d: %s\r\n%s"), TranslateT("Error"), errorCode, TranslateTS(JabberErrorStr(errorCode)), str);
	else
		mir_sntprintf(errorStr, 256, _T("%s %d: %s"), TranslateT("Error"), errorCode, TranslateTS(JabberErrorStr(errorCode)));

	if (pErrorCode)
		*pErrorCode = errorCode;
	return errorStr;
}

void CJabberProto::SendVisibleInvisiblePresence(BOOL invisible)
{
	if (!m_bJabberOnline) return;

	LISTFOREACH(i, this, LIST_ROSTER)
	{
		JABBER_LIST_ITEM *item = ListGetItemPtrFromIndex(i);
		if (item == NULL)
			continue;

		MCONTACT hContact = HContactFromJID(item->jid);
		if (hContact == NULL)
			continue;

		WORD apparentMode = getWord(hContact, "ApparentMode", 0);
		if (invisible==TRUE && apparentMode==ID_STATUS_OFFLINE)
			m_ThreadInfo->send(XmlNode(_T("presence")) << XATTR(_T("to"), item->jid) << XATTR(_T("type"), _T("invisible")));
		else if (invisible==FALSE && apparentMode==ID_STATUS_ONLINE)
			SendPresenceTo(m_iStatus, item->jid, NULL);
}	}

time_t __stdcall JabberIsoToUnixTime(const TCHAR *stamp)
{
	struct tm timestamp;
	TCHAR date[9];
	int i, y;
	time_t t;

	if (stamp == NULL) return (time_t) 0;

	const TCHAR *p = stamp;

	// Get the date part
	for (i=0; *p!='\0' && i<8 && isdigit(*p); p++,i++)
		date[i] = *p;

	// Parse year
	if (i == 6) {
		// 2-digit year (1970-2069)
		y = (date[0]-'0')*10 + (date[1]-'0');
		if (y < 70) y += 100;
	}
	else if (i == 8) {
		// 4-digit year
		y = (date[0]-'0')*1000 + (date[1]-'0')*100 + (date[2]-'0')*10 + date[3]-'0';
		y -= 1900;
	}
	else
		return (time_t) 0;
	timestamp.tm_year = y;
	// Parse month
	timestamp.tm_mon = (date[i-4]-'0')*10 + date[i-3]-'0' - 1;
	// Parse date
	timestamp.tm_mday = (date[i-2]-'0')*10 + date[i-1]-'0';

	// Skip any date/time delimiter
	for (; *p!='\0' && !isdigit(*p); p++);

	// Parse time
	if (_stscanf(p, _T("%d:%d:%d"), &timestamp.tm_hour, &timestamp.tm_min, &timestamp.tm_sec) != 3)
		return (time_t) 0;

	timestamp.tm_isdst = 0;	// DST is already present in _timezone below
	t = mktime(&timestamp);

	_tzset();
	t -= _timezone;

	if (t >= 0)
		return t;
	else
		return (time_t) 0;
}

void CJabberProto::SendPresenceTo(int status, const TCHAR* to, HXML extra, const TCHAR *msg)
{
	if (!m_bJabberOnline) return;

	// Send <presence/> update for status (we won't handle ID_STATUS_OFFLINE here)
	short iPriority = (short)getWord("Priority", 0);
	UpdatePriorityMenu(iPriority);

	TCHAR szPriority[40];
	_itot(iPriority, szPriority, 10);

	XmlNode p(_T("presence")); p << XCHILD(_T("priority"), szPriority);
	if (to != NULL)
		p << XATTR(_T("to"), to);

	if (extra)
		xmlAddChild(p, extra);

	// XEP-0115:Entity Capabilities
	HXML c = p << XCHILDNS(_T("c"), JABBER_FEAT_ENTITY_CAPS) << XATTR(_T("node"), JABBER_CAPS_MIRANDA_NODE)
		<< XATTR(_T("ver"), szCoreVersion);

	LIST<TCHAR> arrExtCaps(5);
	if (bSecureIM)
		arrExtCaps.insert( _T(JABBER_EXT_SECUREIM));

	if (bMirOTR)
		arrExtCaps.insert( _T(JABBER_EXT_MIROTR));

	if (bNewGPG)
		arrExtCaps.insert( _T(JABBER_EXT_NEWGPG));

	if (bPlatform)
		arrExtCaps.insert( _T(JABBER_EXT_PLATFORMX64));
	else
		arrExtCaps.insert( _T(JABBER_EXT_PLATFORMX86));

	if (m_options.EnableRemoteControl)
		arrExtCaps.insert( _T(JABBER_EXT_COMMANDS));

	if (m_options.EnableUserMood)
		arrExtCaps.insert( _T(JABBER_EXT_USER_MOOD));

	if (m_options.EnableUserTune)
		arrExtCaps.insert( _T(JABBER_EXT_USER_TUNE));

	if (m_options.EnableUserActivity)
		arrExtCaps.insert( _T(JABBER_EXT_USER_ACTIVITY));

	if (m_options.AcceptNotes)
		arrExtCaps.insert( _T(JABBER_EXT_MIR_NOTES));

	NotifyFastHook(hExtListInit, (WPARAM)&arrExtCaps, (LPARAM)(IJabberInterface*)this);

	// add features enabled through IJabberNetInterface::AddFeatures()
	for (int i=0; i < m_lstJabberFeatCapPairsDynamic.getCount(); i++)
		if (m_uEnabledFeatCapsDynamic & m_lstJabberFeatCapPairsDynamic[i]->jcbCap)
			arrExtCaps.insert(m_lstJabberFeatCapPairsDynamic[i]->szExt);

	if (arrExtCaps.getCount()) {
		CMString szExtCaps = arrExtCaps[0];
		for (int i=1; i < arrExtCaps.getCount(); i++) {
			szExtCaps.AppendChar(' ');
			szExtCaps += arrExtCaps[i];
		}
		xmlAddAttr(c, _T("ext"), szExtCaps);
	}

	if (m_options.EnableAvatars) {
		HXML x = p << XCHILDNS(_T("x"), _T("vcard-temp:x:update"));

		ptrA hashValue( getStringA("AvatarHash"));
		if (hashValue != NULL) // XEP-0153: vCard-Based Avatars
			x << XCHILD(_T("photo"), _A2T(hashValue));
		else
			x << XCHILD(_T("photo"));
	}
	{
		mir_cslock lck(m_csModeMsgMutex);
		switch (status) {
		case ID_STATUS_ONLINE:
			if (!msg) msg = m_modeMsgs.szOnline;
			break;
		case ID_STATUS_INVISIBLE:
			p << XATTR(_T("type"), _T("invisible"));
			break;
		case ID_STATUS_AWAY:
		case ID_STATUS_ONTHEPHONE:
		case ID_STATUS_OUTTOLUNCH:
			p << XCHILD(_T("show"), _T("away"));
			if (!msg) msg = m_modeMsgs.szAway;
			break;
		case ID_STATUS_NA:
			p << XCHILD(_T("show"), _T("xa"));
			if (!msg) msg = m_modeMsgs.szNa;
			break;
		case ID_STATUS_DND:
		case ID_STATUS_OCCUPIED:
			p << XCHILD(_T("show"), _T("dnd"));
			if (!msg) msg = m_modeMsgs.szDnd;
			break;
		case ID_STATUS_FREECHAT:
			p << XCHILD(_T("show"), _T("chat"));
			if (!msg) msg = m_modeMsgs.szFreechat;
			break;
		default: // Should not reach here
			break;
		}

		if (msg)
			p << XCHILD(_T("status"), msg);
	}

	m_ThreadInfo->send(p);
}

void CJabberProto::SendPresence(int status, bool bSendToAll)
{
	SendPresenceTo(status, NULL, NULL);
	SendVisibleInvisiblePresence(status == ID_STATUS_INVISIBLE);

	// Also update status in all chatrooms
	if (bSendToAll) {
		LISTFOREACH(i, this, LIST_CHATROOM)
		{
			JABBER_LIST_ITEM *item = ListGetItemPtrFromIndex(i);
			if (item != NULL) {
				TCHAR text[ 1024 ];
				mir_sntprintf(text, SIZEOF(text), _T("%s/%s"), item->jid, item->nick);
				SendPresenceTo(status == ID_STATUS_INVISIBLE ? ID_STATUS_ONLINE : status, text, NULL);
}	}	}	}

///////////////////////////////////////////////////////////////////////////////
// JabberGetPacketID - converts the xml id attribute into an integer

int __stdcall JabberGetPacketID(HXML n)
{
	int result = -1;

	const TCHAR *str = xmlGetAttrValue(n, _T("id"));
	if (str)
		if (!_tcsncmp(str, _T(JABBER_IQID), SIZEOF(JABBER_IQID)-1))
			result = _ttoi(str + SIZEOF(JABBER_IQID)-1);

	return result;
}

///////////////////////////////////////////////////////////////////////////////
// JabberGetClientJID - adds a resource postfix to a JID

TCHAR* CJabberProto::GetClientJID(MCONTACT hContact, TCHAR *dest, size_t destLen)
{
	if (hContact == NULL)
		return NULL;

	ptrT jid( getTStringA(hContact, "jid"));
	return GetClientJID(jid, dest, destLen);
}

TCHAR* CJabberProto::GetClientJID(const TCHAR *jid, TCHAR *dest, size_t destLen)
{
	if (jid == NULL)
		return NULL;

	_tcsncpy_s(dest, destLen, jid, _TRUNCATE);
	TCHAR *p = _tcschr(dest, '/');

	mir_cslock lck(m_csLists);
	JABBER_LIST_ITEM *LI = ListGetItemPtr(LIST_ROSTER, jid);
	if (LI != NULL) {
		if (LI->arResources.getCount() == 1 && !lstrcmp(LI->arResources[0]->m_tszCapsNode, _T("http://talk.google.com/xmpp/bot/caps"))) {
			if (p) *p = 0;
			return dest;
		}

		if (p == NULL) {
			pResourceStatus r( LI->getBestResource());
			if (r != NULL)
				mir_sntprintf(dest, destLen, _T("%s/%s"), jid, r->m_tszResourceName);
		}
	}

	return dest;
}

///////////////////////////////////////////////////////////////////////////////
// JabberStripJid - strips a resource postfix from a JID

TCHAR* __stdcall JabberStripJid(const TCHAR *jid, TCHAR *dest, size_t destLen)
{
	if (jid == NULL)
		*dest = 0;
	else {
		_tcsncpy_s(dest, destLen, jid, _TRUNCATE);

		TCHAR *p = _tcschr(dest, '/');
		if (p != NULL)
			*p = 0;
	}

	return dest;
}

/////////////////////////////////////////////////////////////////////////////////////////
// JabberGetPictureType - tries to autodetect the picture type from the buffer

LPCTSTR __stdcall JabberGetPictureType(HXML node, const char *picBuf)
{
	if (LPCTSTR ptszType = xmlGetText( xmlGetChild(node , "TYPE")))
		if (!_tcscmp(ptszType, _T("image/jpeg")) ||
		     !_tcscmp(ptszType, _T("image/png"))  ||
		     !_tcscmp(ptszType, _T("image/gif"))  ||
		     !_tcscmp(ptszType, _T("image/bmp")))
			return ptszType;

	switch( ProtoGetBufferFormat(picBuf)) {
		case PA_FORMAT_GIF:	return _T("image/gif");
		case PA_FORMAT_BMP:  return _T("image/bmp");
		case PA_FORMAT_PNG:  return _T("image/png");
		case PA_FORMAT_JPEG: return _T("image/jpeg");
	}

	return NULL;
}

/////////////////////////////////////////////////////////////////////////////////////////
// TStringPairs class members

TStringPairs::TStringPairs(char* buffer) :
	elems(NULL)
{
   TStringPairsElem tempElem[ 100 ];

	char* token = strtok(buffer, ",");

	for (numElems=0; token != NULL; numElems++) {
		char* p = strchr(token, '='), *p1;
		if (p == NULL)
			break;

		while(isspace(*token))
			token++;

		tempElem[ numElems ].name = rtrim(token);
		*p++ = 0;
		if ((p1 = strchr(p, '\"')) != NULL) {
			*p1 = 0;
			p = p1+1;
		}

		if ((p1 = strrchr(p, '\"')) != NULL)
			*p1 = 0;

		tempElem[ numElems ].value = rtrim(p);
		token = strtok(NULL, ",");
	}

	if (numElems) {
		elems = new TStringPairsElem[ numElems ];
		memcpy(elems, tempElem, sizeof(tempElem[0]) * numElems);
}	}

TStringPairs::~TStringPairs()
{
	delete[] elems;
}

const char* TStringPairs::operator[](const char* key) const
{
	for (int i=0; i < numElems; i++)
		if (!strcmp(elems[i].name, key))
			return elems[i].value;

	return "";
}

////////////////////////////////////////////////////////////////////////
// Manage combo boxes with recent item list

void CJabberProto::ComboLoadRecentStrings(HWND hwndDlg, UINT idcCombo, char *param, int recentCount)
{
	for (int i=0; i < recentCount; i++) {
		char setting[MAXMODULELABELLENGTH];
		mir_snprintf(setting, sizeof(setting), "%s%d", param, i);
		ptrT tszRecent( getTStringA(setting));
		if (tszRecent != NULL)
			SendDlgItemMessage(hwndDlg, idcCombo, CB_ADDSTRING, 0, tszRecent);
	}

	if (!SendDlgItemMessage(hwndDlg, idcCombo, CB_GETCOUNT, 0, 0))
		SendDlgItemMessage(hwndDlg, idcCombo, CB_ADDSTRING, 0, (LPARAM)_T(""));
}

void CJabberProto::ComboAddRecentString(HWND hwndDlg, UINT idcCombo, char *param, const TCHAR *string, int recentCount)
{
	if (!string || !*string)
		return;
	if (SendDlgItemMessage(hwndDlg, idcCombo, CB_FINDSTRING, (WPARAM)-1, (LPARAM)string) != CB_ERR)
		return;

	int id;
	SendDlgItemMessage(hwndDlg, idcCombo, CB_ADDSTRING, 0, (LPARAM)string);
	if ((id = SendDlgItemMessage(hwndDlg, idcCombo, CB_FINDSTRING, (WPARAM)-1, (LPARAM)_T(""))) != CB_ERR)
		SendDlgItemMessage(hwndDlg, idcCombo, CB_DELETESTRING, id, 0);

	id = getByte(param, 0);
	char setting[MAXMODULELABELLENGTH];
	mir_snprintf(setting, sizeof(setting), "%s%d", param, id);
	setTString(setting, string);
	setByte(param, (id+1)%recentCount);
}

/////////////////////////////////////////////////////////////////////////////////////////
// jabber frame maintenance code

static VOID CALLBACK sttRebuildInfoFrameApcProc(void* param)
{
	CJabberProto *ppro = (CJabberProto *)param;
	if (!ppro->m_pInfoFrame)
		return;

	ppro->m_pInfoFrame->LockUpdates();
	if (!ppro->m_bJabberOnline) {
		ppro->m_pInfoFrame->RemoveInfoItem("$/PEP");
		ppro->m_pInfoFrame->RemoveInfoItem("$/Transports");
		ppro->m_pInfoFrame->UpdateInfoItem("$/JID", LoadSkinnedIconHandle(SKINICON_OTHER_USERDETAILS), TranslateT("Offline"));
	}
	else {
		ppro->m_pInfoFrame->UpdateInfoItem("$/JID", LoadSkinnedIconHandle(SKINICON_OTHER_USERDETAILS), ppro->m_szJabberJID);

		if (!ppro->m_bPepSupported)
			ppro->m_pInfoFrame->RemoveInfoItem("$/PEP");
		else {
			ppro->m_pInfoFrame->RemoveInfoItem("$/PEP/");
			ppro->m_pInfoFrame->CreateInfoItem("$/PEP", false);
			ppro->m_pInfoFrame->UpdateInfoItem("$/PEP", ppro->GetIconHandle(IDI_PL_LIST_ANY), TranslateT("Advanced Status"));

			ppro->m_pInfoFrame->CreateInfoItem("$/PEP/mood", true);
			ppro->m_pInfoFrame->SetInfoItemCallback("$/PEP/mood", &CJabberProto::InfoFrame_OnUserMood);
			ppro->m_pInfoFrame->UpdateInfoItem("$/PEP/mood", LoadSkinnedIconHandle(SKINICON_OTHER_SMALLDOT), TranslateT("Set mood..."));

			ppro->m_pInfoFrame->CreateInfoItem("$/PEP/activity", true);
			ppro->m_pInfoFrame->SetInfoItemCallback("$/PEP/activity", &CJabberProto::InfoFrame_OnUserActivity);
			ppro->m_pInfoFrame->UpdateInfoItem("$/PEP/activity", LoadSkinnedIconHandle(SKINICON_OTHER_SMALLDOT), TranslateT("Set activity..."));
		}

		ppro->m_pInfoFrame->RemoveInfoItem("$/Transports/");
		ppro->m_pInfoFrame->CreateInfoItem("$/Transports", false);
		ppro->m_pInfoFrame->UpdateInfoItem("$/Transports", ppro->GetIconHandle(IDI_TRANSPORT), TranslateT("Transports"));

		JABBER_LIST_ITEM *item = NULL;
		LISTFOREACH(i, ppro, LIST_ROSTER)
		{
			if ((item=ppro->ListGetItemPtrFromIndex(i)) != NULL) {
				if (_tcschr(item->jid, '@') == NULL && _tcschr(item->jid, '/') == NULL && item->subscription!=SUB_NONE) {
					MCONTACT hContact = ppro->HContactFromJID(item->jid);
					if (hContact == NULL) continue;

					char name[128];
					char *jid_copy = mir_t2a(item->jid);
					mir_snprintf(name, SIZEOF(name), "$/Transports/%s", jid_copy);
					ppro->m_pInfoFrame->CreateInfoItem(name, true, (LPARAM)hContact);
					ppro->m_pInfoFrame->UpdateInfoItem(name, ppro->GetIconHandle(IDI_TRANSPORTL), (TCHAR *)item->jid);
					ppro->m_pInfoFrame->SetInfoItemCallback(name, &CJabberProto::InfoFrame_OnTransport);
					mir_free(jid_copy);
			}	}
		}
	}
	ppro->m_pInfoFrame->Update();
}

void CJabberProto::RebuildInfoFrame()
{
	CallFunctionAsync(sttRebuildInfoFrameApcProc, this);
}

////////////////////////////////////////////////////////////////////////
// time2str & str2time

TCHAR* time2str(time_t _time, TCHAR *buf, size_t bufLen)
{
	struct tm* T = localtime(&_time);
	mir_sntprintf(buf, bufLen, _T("%04d-%02d-%02dT%02d:%02d:%02dZ"),
		T->tm_year+1900, T->tm_mon+1, T->tm_mday, T->tm_hour, T->tm_min, T->tm_sec);
	return buf;
}

time_t str2time(const TCHAR *buf)
{
	struct tm T = { 0 };
	if ( _stscanf(buf, _T("%04d-%02d-%02dT%02d:%02d:%02dZ"), &T.tm_year, &T.tm_mon, &T.tm_mday, &T.tm_hour, &T.tm_min, &T.tm_sec) != 6) {
		int boo;
		if ( _stscanf(buf, _T("%04d-%02d-%02dT%02d:%02d:%02d.%dZ"), &T.tm_year, &T.tm_mon, &T.tm_mday, &T.tm_hour, &T.tm_min, &T.tm_sec, &boo) != 7)
			return 0;
	}

	T.tm_year -= 1900;
	T.tm_mon--;
	return mktime(&T);
}

////////////////////////////////////////////////////////////////////////
// case-insensitive _tcsstr
const TCHAR *JabberStrIStr(const TCHAR *str, const TCHAR *substr)
{
	TCHAR *str_up = NEWTSTR_ALLOCA(str);
	TCHAR *substr_up = NEWTSTR_ALLOCA(substr);

	CharUpperBuff(str_up, lstrlen(str_up));
	CharUpperBuff(substr_up, lstrlen(substr_up));

	TCHAR *p = _tcsstr(str_up, substr_up);
	return p ? (str + (p - str_up)) : NULL;
}

////////////////////////////////////////////////////////////////////////
// clipboard processing

void JabberCopyText(HWND hwnd, const TCHAR *text)
{
	if (!hwnd || !text) return;

	OpenClipboard(hwnd);
	EmptyClipboard();
	HGLOBAL hMem = GlobalAlloc(GMEM_MOVEABLE, sizeof(TCHAR)*(lstrlen(text)+1));
	TCHAR *s = (TCHAR *)GlobalLock(hMem);
	lstrcpy(s, text);
	GlobalUnlock(hMem);
	SetClipboardData(CF_UNICODETEXT, hMem);
	CloseClipboard();
}

BOOL CJabberProto::EnterString(CMString &result, LPCTSTR caption, int type, char *windowName, int recentCount, int timeout)
{
	if (caption == NULL) {
		caption = NEWTSTR_ALLOCA(result.GetString());
		result.Empty();
	}

	ENTER_STRING param = { sizeof(param) };
	param.type = type;
	param.caption = caption;
	param.szModuleName = m_szModuleName;
	param.szDataPrefix = windowName;
	param.recentCount = recentCount;
	param.timeout = timeout;
	param.ptszInitVal = result;
	BOOL res = ::EnterString(&param);
	if (res) {
		result = param.ptszResult;
		mir_free(param.ptszResult);
	}
	return res;
}

/////////////////////////////////////////////////////////////////////////////////////////
// XEP-0203 delay support

bool JabberReadXep203delay(HXML node, time_t &msgTime)
{
	HXML n = xmlGetChildByTag(node, "delay", "xmlns", _T("urn:xmpp:delay"));
	if (n == NULL)
		return false;

	const TCHAR *ptszTimeStamp = xmlGetAttrValue(n, _T("stamp"));
	if (ptszTimeStamp == NULL)
		return false;

	// skip '-' chars
	TCHAR *szStamp = NEWTSTR_ALLOCA(ptszTimeStamp);
	int si = 0, sj = 0;
	while (true) {
		if (szStamp[si] == _T('-'))
			si++;
		else if (!(szStamp[sj++] = szStamp[si++]))
			break;
	};
	msgTime = JabberIsoToUnixTime(szStamp);
	return msgTime != 0;
}

bool CJabberProto::IsMyOwnJID(LPCTSTR szJID)
{
	if (m_ThreadInfo == NULL)
		return false;

	ptrT szFrom(JabberPrepareJid(szJID));
	if (szFrom == NULL)
		return false;

	ptrT szTo(JabberPrepareJid(m_ThreadInfo->fullJID));
	if (szTo == NULL)
		return false;

	TCHAR *pDelimiter = _tcschr(szFrom, _T('/'));
	if (pDelimiter)
		*pDelimiter = 0;

	pDelimiter = _tcschr(szTo, _T('/'));
	if (pDelimiter)
		*pDelimiter = 0;

	return _tcscmp(szFrom, szTo) == 0;
}

void __cdecl CJabberProto::LoadHttpAvatars(void* param)
{
	OBJLIST<JABBER_HTTP_AVATARS> &avs = *(OBJLIST<JABBER_HTTP_AVATARS>*)param;
	HANDLE hHttpCon = NULL;
	for (int i = 0; i < avs.getCount(); i++) {
		NETLIBHTTPREQUEST nlhr = { 0 };
		nlhr.cbSize = sizeof(nlhr);
		nlhr.requestType = REQUEST_GET;
		nlhr.flags = NLHRF_HTTP11 | NLHRF_REDIRECT | NLHRF_PERSISTENT;
		nlhr.szUrl = avs[i].Url;
		nlhr.nlc = hHttpCon;

		NETLIBHTTPREQUEST * res = (NETLIBHTTPREQUEST*)CallService(MS_NETLIB_HTTPTRANSACTION, (WPARAM)m_hNetlibUser, (LPARAM)&nlhr);
		if (res) {
			hHttpCon = res->nlc;
			if (res->resultCode == 200 && res->dataLength) {
				int pictureType = ProtoGetBufferFormat(res->pData);
				if (pictureType != PA_FORMAT_UNKNOWN) {
					PROTO_AVATAR_INFORMATIONT AI;
					AI.cbSize = sizeof(AI);
					AI.format = pictureType;
					AI.hContact = avs[i].hContact;

					if (getByte(AI.hContact, "AvatarType", PA_FORMAT_UNKNOWN) != (unsigned char)pictureType) {
						TCHAR tszFileName[MAX_PATH];
						GetAvatarFileName(AI.hContact, tszFileName, SIZEOF(tszFileName));
						DeleteFile(tszFileName);
					}

					setByte(AI.hContact, "AvatarType", pictureType);

					char buffer[2 * MIR_SHA1_HASH_SIZE + 1];
					BYTE digest[MIR_SHA1_HASH_SIZE];
					mir_sha1_ctx sha;
					mir_sha1_init(&sha);
					mir_sha1_append(&sha, (BYTE*)res->pData, res->dataLength);
					mir_sha1_finish(&sha, digest);
					bin2hex(digest, sizeof(digest), buffer);

					ptrA cmpsha(getStringA(AI.hContact, "AvatarSaved"));
					if (cmpsha == NULL || strnicmp(cmpsha, buffer, sizeof(buffer))) {
						TCHAR tszFileName[MAX_PATH];
						GetAvatarFileName(AI.hContact, tszFileName, SIZEOF(tszFileName));
						_tcsncpy(AI.filename, tszFileName, SIZEOF(AI.filename));
						FILE* out = _tfopen(tszFileName, _T("wb"));
						if (out != NULL) {
							fwrite(res->pData, res->dataLength, 1, out);
							fclose(out);
							setString(AI.hContact, "AvatarSaved", buffer);
							ProtoBroadcastAck(AI.hContact, ACKTYPE_AVATAR, ACKRESULT_SUCCESS, &AI, 0);
							debugLogA("Broadcast new avatar: %s", AI.filename);
						}
						else ProtoBroadcastAck(AI.hContact, ACKTYPE_AVATAR, ACKRESULT_FAILED, &AI, 0);
					}
				}
			}
			CallService(MS_NETLIB_FREEHTTPREQUESTSTRUCT, 0, (LPARAM)res);
		}
		else hHttpCon = NULL;
	}
	delete &avs;
	if (hHttpCon)
		Netlib_CloseHandle(hHttpCon);
}