Fix CS_OnBuy* not triggered from alias containing uppercase letters

modules/cstrike/cstrike/CstrikeHacks.cpp

@@ -158,8 +158,11 @@ DETOUR_DECL_STATIC1(C_ClientCommand, void, edict_t*, pEdict) // void ClientComma
 				if (get_pdata<CUnifiedSignals>(pEdict, SignalsDesc.fieldOffset).GetState() & SIGNAL_BUY) // Are we inside the buy zone?
 				{
 					AliasInfo info;
+					char commandLowered[32];
 
-					if (ItemsManager.GetAliasInfosFromBuy(command, &info))
+					UTIL_StringToLower(command, commandLowered, sizeof(commandLowered));
+
+					if (ItemsManager.GetAliasInfosFromBuy(commandLowered, &info))
 					{
 						CurrentItemId = info.itemid;
 					}

modules/cstrike/cstrike/CstrikeUtils.cpp

@@ -12,6 +12,7 @@
 //
 
 #include "amxxmodule.h"
+#include <amtl/am-algorithm.h>
 
 extern int MessageIdTextMsg;
 
@@ -47,3 +48,22 @@ bool UTIL_CheckForPublic(const char *publicname)
 
 	return false;
 }
+
+void UTIL_StringToLower(const char *str, char *buffer, size_t maxlength)
+{
+	auto length = ke::Min(strlen(str), maxlength - 1);
+
+	for (size_t i = 0; i < length; ++i)
+	{
+		if (str[i] >= 'A' && str[i] <= 'Z')
+		{
+			buffer[i] = tolower(str[i]);
+		}
+		else
+		{
+			buffer[i] = str[i];
+		}
+	}
+
+	buffer[length] = '\0';
+}

modules/cstrike/cstrike/CstrikeUtils.h

@@ -21,6 +21,7 @@ extern HLTypeConversion TypeConversion;
 bool UTIL_IsPlayer(edict_t *pPlayer);
 void UTIL_TextMsg_Generic(edict_t* pPlayer, const char* message);
 bool UTIL_CheckForPublic(const char *publicname);
+void UTIL_StringToLower(const char *str, char *buffer, size_t maxlength);
 
 #define GETINFOKEYBUFFER	(*g_engfuncs.pfnGetInfoKeyBuffer)
 #define	SETCLIENTKEYVALUE	(*g_engfuncs.pfnSetClientKeyValue)