Add hasprivs chat command (#7336)

Require 'basic_privs' priv
Only the online players are listed.

builtin/game/chatcommands.lua

@@ -41,7 +41,7 @@ end)

if core.settings:get_bool("profiler.load") then
	-- Run after register_chatcommand and its register_on_chat_message
	-- Before any chattcommands that should be profiled
	-- Before any chatcommands that should be profiled
	profiler.init_chatcommand()
end

@@ -103,6 +103,31 @@ core.register_chatcommand("privs", {
	end,
})

core.register_chatcommand("hasprivs", {
	params = "<privilege>",
	description = "Return list of all online players with privilege.",
	privs = {basic_privs = true},
	func = function(caller, param)
		param = param:trim()
		if param == "" then
			return false, "Invalid parameters (see /help hasprivs)"
		end
		if not core.registered_privileges[param] then
			return false, "Unknown privilege!"
		end
		local privs = core.string_to_privs(param)
		local players_with_privs = {}
		for _, player in pairs(core.get_connected_players()) do
			local player_name = player:get_player_name()
			if core.check_player_privs(player_name, privs) then
				table.insert(players_with_privs, player_name)
			end
		end	
		return true, "Players online with the \"" .. param .. "\" priv: " ..
			table.concat(players_with_privs, ", ")
	end	
})

local function handle_grant_command(caller, grantname, grantprivstr)
	local caller_privs = core.get_player_privs(caller)
	if not (caller_privs.privs or caller_privs.basic_privs) then