PotatoCraft-Studio#305 Fix wrong potionEffect level showing

Author: sandtechnology

src/main/java/org/maxgamer/quickshop/shop/SimpleShopManager.java

@@ -1356,7 +1356,9 @@ public void sendShopInfo(@NotNull Player p, @NotNull Shop shop) {
             }
             if (potionMeta.hasCustomEffects()) {
                 for (PotionEffect potionEffect : potionMeta.getCustomEffects()) {
-                    int level = potionEffect.getAmplifier();
+                    // https://hub.spigotmc.org/jira/browse/SPIGOT-1697
+                    // Internal api notes: amplifier starts from zero, so plus one to get the correct result
+                    int level = potionEffect.getAmplifier() + 1;
                     chatSheetPrinter.printLine(ChatColor.YELLOW + MsgUtil.getPotioni18n(potionEffect.getType()) + " " + (level <= 10 ? RomanNumber.toRoman(potionEffect.getAmplifier()) : level));
                 }
             }

src/main/java/org/maxgamer/quickshop/util/Util.java

@@ -552,7 +552,9 @@ public static String getItemCustomName(@NotNull ItemStack itemStack) {
                 } else if (potionMeta.hasCustomEffects()) {
                     PotionEffect potionEffect = potionMeta.getCustomEffects().get(0);
                     if (potionEffect != null) {
-                        int level = potionEffect.getAmplifier();
+                        // https://hub.spigotmc.org/jira/browse/SPIGOT-1697
+                        // Internal api notes: amplifier starts from zero, so plus one to get the correct result
+                        int level = potionEffect.getAmplifier() + 1;
                         return MsgUtil.getPotioni18n(potionEffect.getType()) + " " + (level <= 10 ? RomanNumber.toRoman(potionEffect.getAmplifier()) : level);
                     }
                 }