add a new argument on the register command feature

[core]/es_extended/server/functions.lua

@@ -146,6 +146,14 @@ function ESX.RegisterCommand(name, group, cb, allowConsole, suggestion)
                                 end
                             end
                         end
+                        
+                        if v.isValid and not error then
+                            local candidate = newArgs[v.name]
+                            local ok, res = pcall(v.isValid, candidate)
+                            if not ok or res ~= true then
+                                error = v.error or TranslateCap("commanderror_argumentmismatch_" .. (v.name or tostring(k)), k)
+                            end
+                        end
 
                         --backwards compatibility
                         if v.validate ~= nil and not v.validate then

[core]/es_extended/server/modules/commands.lua

@@ -313,7 +313,9 @@ if not Config.CustomInventory then
             arguments = {
                 { name = "playerId", help = TranslateCap("commandgeneric_playerid"), type = "player" },
                 { name = "item", help = TranslateCap("command_giveitem_item"), type = "item" },
-                { name = "count", help = TranslateCap("command_giveitem_count"), type = "number" },
+                { name = "count", help = TranslateCap("command_giveitem_count"), type = "number", isValid = function (countValue)
+                    return countValue > 0
+                end },
             },
         }
     )