string escaping

api.lua

@@ -20,6 +20,23 @@ function x_marketplace.isnan(value)
 	return value ~= value
 end
 
+local function esc(x)
+	return (x:gsub('%%', '%%%%')
+					 :gsub('^%^', '%%^')
+					 :gsub('%$$', '%%$')
+					 :gsub('%(', '%%(')
+					 :gsub('%)', '%%)')
+					 :gsub('%.', '%%.')
+					 :gsub('%,', '%%,')
+					 :gsub('%;', '%%;')
+					 :gsub('%[', '%%[')
+					 :gsub('%]', '%%]')
+					 :gsub('%*', '%%*')
+					 :gsub('%+', '%%+')
+					 :gsub('%-', '%%-')
+					 :gsub('%?', '%%?'))
+end
+
 -- rounds a number to the nearest decimal places
 local function round(val, decimal)
   if (decimal) then
@@ -34,8 +51,9 @@ end
 -- @return string with found items, if no items found returns boolean false
 function x_marketplace.store_find(string)
 	local found = ""
+	local str = esc(string)
 	for k, v in pairs(x_marketplace.store_list) do
-		if string.find(k, string) then
+		if string.find(k, str) then
 			found = found..k.." buy: "..string.format("%.2f", v.buy).." sell: "..string.format("%.2f", v.sell).."\n"
 		end
 	end

chatcommands.lua

@@ -22,7 +22,7 @@ minetest.register_chatcommand("mp", {
 				return false, minetest.colorize(x_marketplace.colors.red, "MARKET PLACE: You need to write the item name you want to find. example: /mp find default:stone. See some suggestion from the store: ")..x_marketplace.store_get_random()
 			end
 
-			local items = x_marketplace.store_find(minetest.formspec_escape(params[2]))
+			local items = x_marketplace.store_find(params[2])
 
 			if not items then
 				return false, minetest.colorize(x_marketplace.colors.yellow, "MARKET PLACE: Oops there is no item like this in the store. Check out other items in the store: ")..x_marketplace.store_get_random()
@@ -353,7 +353,7 @@ minetest.register_chatcommand("mp", {
 
 			-- item not in store
 			if not x_marketplace.store_list[params[2]] then
-				local suggestions = x_marketplace.store_find(minetest.formspec_escape(params[2]))
+				local suggestions = x_marketplace.store_find(params[2])
 
 				-- try suggest item from store, else show random items
 				if suggestions then