Resolve old bot's connection state issues (#917)

* final bot's fixes

Fixes: #916
Fixes: #883
Fixes: #875

* suggestions

* suggestions

Co-authored-by: shel <2@shelru.ru>

amxmodx/amxmodx.cpp

@@ -799,6 +799,26 @@ static cell AMX_NATIVE_CALL is_user_connected(AMX *amx, cell *params) /* 1 param
 
 	CPlayer* pPlayer = GET_PLAYER_POINTER_I(index);
 
+	if(pPlayer->IsBot())
+	{
+		// For legacy bot's
+		// which are using is_user_connected
+		// to check out is bot connected to server
+		return (pPlayer->initialized ? 1 : 0);
+	}
+
+	return (pPlayer->ingame ? 1 : 0);
+}
+
+static cell AMX_NATIVE_CALL is_user_connected_ex(AMX *amx, cell *params) /* 1 param */
+{
+	int index = params[1];
+
+	if (index < 1 || index > gpGlobals->maxClients)
+		return 0;
+
+	CPlayer* pPlayer = GET_PLAYER_POINTER_I(index);
+
 	return (pPlayer->ingame ? 1 : 0);
 }
 
@@ -4776,6 +4796,7 @@ AMX_NATIVE_INFO amxmodx_Natives[] =
 	{"is_user_authorized",		is_user_authorized},
 	{"is_user_bot",				is_user_bot},
 	{"is_user_connected",		is_user_connected},
+	{"is_user_connected_ex",	is_user_connected_ex},
 	{"is_user_connecting",		is_user_connecting},
 	{"is_user_hltv",			is_user_hltv},
 	{"lang_exists",				lang_exists},
@@ -4796,7 +4817,7 @@ AMX_NATIVE_INFO amxmodx_Natives[] =
 	{"plugin_flags",			plugin_flags},
 	{"precache_model",			precache_model},
 	{"precache_sound",			precache_sound},
-	{"precache_generic",			precache_generic},
+	{"precache_generic",		precache_generic},
 	{"precache_event",			precache_event},
 	{"random_float",			random_float},
 	{"random_num",				random_num},

amxmodx/meta_api.cpp

@@ -1020,8 +1020,20 @@ void C_ClientUserInfoChanged_Post(edict_t *pEntity, char *infobuffer)
 	// Emulate bot connection and putinserver
 	if (pPlayer->ingame)
 	{
-		pPlayer->name =name;			//	Make sure player have name up to date
-	} else if (pEntity && pEntity->pvPrivateData && pPlayer->IsBot()) {
+		pPlayer->name=name;			//	Make sure player have name up to date
+	}
+	else
+	if(infobuffer /* just for safety */
+		&& pEntity
+		&& pEntity->pvPrivateData /* have a private data (same as player) */
+		&& pPlayer->initialized /* needless check due strstr, but we should confirm that there's no putinserver before client_connect */
+		&& pPlayer->IsBot() && strstr(infobuffer, "\\*bot\\1")) {
+
+		pPlayer->PutInServer();
+		++g_players_num;
+		executeForwards(FF_ClientPutInServer, static_cast<cell>(pPlayer->index));
+	}
+	else if (pEntity && pPlayer->IsBot()) {
 		pPlayer->Connect(name, "127.0.0.1"/*CVAR_GET_STRING("net_address")*/);
 
 		executeForwards(FF_ClientConnect, static_cast<cell>(pPlayer->index));
@@ -1039,11 +1051,6 @@ void C_ClientUserInfoChanged_Post(edict_t *pEntity, char *infobuffer)
 			}
 		}
 		executeForwards(FF_ClientAuthorized, static_cast<cell>(pPlayer->index), authid);
-
-		pPlayer->PutInServer();
-		++g_players_num;
-
-		executeForwards(FF_ClientPutInServer, static_cast<cell>(pPlayer->index));
 	}
 
 	RETURN_META(MRES_IGNORED);

plugins/include/amxmodx.inc

@@ -943,12 +943,32 @@ native is_user_authorized(index);
  *       1 to MaxClients range. That means you can safely use this native
  *       without manually verifying that the index is a valid client index.
  *
+ * @note Due back-compatibility return's true after bot proceed client_connect
+ *       stage (when bot's pdata isn't created yet).
+ *
+ * @note Use is_user_connected_ex to check player against real connection state
+ * 
  * @param index     Client index
  *
  * @return          1 if client is connected, 0 otherwise
+ *                  always returns 1 if bot passed client_connect stage
  */
 native is_user_connected(index);
 
+/**
+ *
+ * Returns if the client is fully connected (proceed client_putinserver state).
+ *
+ * @note This does not throw an error if the provided index is out of the
+ *       1 to MaxClients range. That means you can safely use this native
+ *       without manually verifying that the index is a valid client index.
+ *
+ * @param index     Client index
+ *
+ * @return          1 if bot is connected, 0 otherwise
+ */
+native is_user_connected_ex(const index);
+
 /**
  * Returns if the client is connecting.
  *