From 6e2c04c2c7ea221afb58e71f6e99f2d0ed1c7781 Mon Sep 17 00:00:00 2001
From: George Hazan <ghazan@miranda.im>
Date: Sun, 25 Apr 2021 20:22:00 +0300
Subject: suddenly: major crutch to handle WhatsApp groupchats history

---
 protocols/WhatsAppWeb/src/chats.cpp  | 16 ++++++++++++++++
 protocols/WhatsAppWeb/src/proto.h    | 10 +++++++++-
 protocols/WhatsAppWeb/src/server.cpp | 29 +++++++++++++++++++++--------
 src/mir_app/src/chat_manager.cpp     | 16 ++++++++--------
 4 files changed, 54 insertions(+), 17 deletions(-)

diff --git a/protocols/WhatsAppWeb/src/chats.cpp b/protocols/WhatsAppWeb/src/chats.cpp
index f674dc3f5c..402fc019ee 100644
--- a/protocols/WhatsAppWeb/src/chats.cpp
+++ b/protocols/WhatsAppWeb/src/chats.cpp
@@ -68,6 +68,22 @@ void WhatsAppProto::OnGetChatInfo(const JSONNode &root, void *param)
 		Chat_Event(&gce);
 	}
 
+	if (pChatUser->arHistory.getCount()) {
+		for (auto &it : pChatUser->arHistory) {
+			CMStringW jid(it->jid), text(Utf2T(it->text));
+
+			GCEVENT gce = { m_szModuleName, 0, GC_EVENT_MESSAGE };
+			gce.pszID.w = pChatUser->si->ptszID;
+			gce.dwFlags = GCEF_ADDTOLOG;
+			gce.pszUID.w = jid;
+			gce.pszText.w = text;
+			gce.time = it->timestamp;
+			gce.bIsMe = (it->jid == m_szJid);
+			Chat_Event(&gce);
+		}
+		pChatUser->arHistory.destroy();
+	}
+
 	CMStringW wszSubject(root["subject"].as_mstring());
 	if (!wszSubject.IsEmpty()) {
 		time_t iSubjectTime(root["subjectTime"].as_int());
diff --git a/protocols/WhatsAppWeb/src/proto.h b/protocols/WhatsAppWeb/src/proto.h
index 878d664c54..0437d4ed36 100644
--- a/protocols/WhatsAppWeb/src/proto.h
+++ b/protocols/WhatsAppWeb/src/proto.h
@@ -71,11 +71,18 @@ struct WARequest
 	void *pUserInfo;
 };
 
+struct WAHistoryMessage
+{
+	CMStringA jid, text;
+	DWORD timestamp;
+};
+
 struct WAUser
 {
 	WAUser(MCONTACT _1, const char *_2) :
 		hContact(_1),
-		szId(mir_strdup(_2))
+		szId(mir_strdup(_2)),
+		arHistory(1)
 	{
 	}
 
@@ -90,6 +97,7 @@ struct WAUser
 	bool bInited = false;
 	SESSION_INFO *si = 0;
 	DWORD m_time1 = 0, m_time2 = 0;
+	OBJLIST<WAHistoryMessage> arHistory;
 };
 
 struct WAOwnMessage
diff --git a/protocols/WhatsAppWeb/src/server.cpp b/protocols/WhatsAppWeb/src/server.cpp
index c771d72220..ff6b0c2740 100644
--- a/protocols/WhatsAppWeb/src/server.cpp
+++ b/protocols/WhatsAppWeb/src/server.cpp
@@ -577,14 +577,27 @@ void WhatsAppProto::ProcessAdd(const CMStringA &type, const WANode *root)
 				CMStringA szText(szMsgText);
 				szText.Replace("%", "%%");
 
-				GCEVENT gce = { m_szModuleName, 0, GC_EVENT_MESSAGE };
-				gce.pszID.a = jid;
-				gce.dwFlags = GCEF_ADDTOLOG | GCEF_UTF8;
-				gce.pszUID.a = payLoad.participant().c_str();
-				gce.pszText.a = szText;
-				gce.time = dwTimestamp;
-				gce.bIsMe = true;
-				Chat_Event(&gce);
+				CMStringA szUserJid(payLoad.participant().c_str());
+				if (!szUserJid.Replace("@s.whatsapp.net", "@c.us"))
+					szUserJid.Replace("@g.whatsapp.net", "@g.us");
+
+				if (pUser->bInited) {
+					GCEVENT gce = { m_szModuleName, 0, GC_EVENT_MESSAGE };
+					gce.pszID.a = jid;
+					gce.dwFlags = GCEF_ADDTOLOG | GCEF_UTF8;
+					gce.pszUID.a = szUserJid;
+					gce.pszText.a = szText;
+					gce.time = dwTimestamp;
+					gce.bIsMe = (jid == m_szJid);
+					Chat_Event(&gce);
+				}
+				else {
+					auto *pMsg = new WAHistoryMessage;
+					pMsg->jid = jid;
+					pMsg->text = szText;
+					pMsg->timestamp = dwTimestamp;
+					pUser->arHistory.insert(pMsg);
+				}
 			}
 			else {
 				PROTORECVEVENT pre = { 0 };
diff --git a/src/mir_app/src/chat_manager.cpp b/src/mir_app/src/chat_manager.cpp
index b7f7001ae0..0a89030837 100644
--- a/src/mir_app/src/chat_manager.cpp
+++ b/src/mir_app/src/chat_manager.cpp
@@ -713,15 +713,15 @@ USERINFO* UM_AddUser(SESSION_INFO *si, const wchar_t *pszUID, const wchar_t *psz
 		return nullptr;
 
 	auto *pUser = UM_FindUser(si, pszUID);
-	if (pUser)
-		return pUser;
-
-	pUser = new USERINFO();
-	pUser->pszUID = mir_wstrdup(pszUID);
-	pUser->pszNick = mir_wstrdup(pszNick);
+	if (pUser == nullptr) {
+		pUser = new USERINFO();
+		si->getKeyList().insert(pUser);
+		si->getUserList().insert(pUser);
+	}
+	
+	replaceStrW(pUser->pszUID, pszUID);
+	replaceStrW(pUser->pszNick, pszNick);
 	pUser->Status = wStatus;
-	si->getKeyList().insert(pUser);
-	si->getUserList().insert(pUser);
 	return pUser;
 }
 
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