BetterPartyFinder/BetterPartyFinder/Util.cs

using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using Dalamud.Data;
using Dalamud.Game.ClientState.Objects.SubKinds;
using Lumina.Excel.GeneratedSheets;

namespace BetterPartyFinder {
    public static class Util {
        internal static uint MaxItemLevel { get; private set; }

        internal static void CalculateMaxItemLevel(DataManager data) {
            if (MaxItemLevel > 0) {
                return;
            }

            var max = data.GetExcelSheet<Item>()!
                .Where(item => item.EquipSlotCategory.Value!.Body != 0)
                .Select(item => item.LevelItem.Value?.RowId)
                .Where(level => level != null)
                .Cast<uint>()
                .Max();

            MaxItemLevel = max;
        }

        internal static bool ContainsIgnoreCase(this string haystack, string needle) {
            return CultureInfo.InvariantCulture.CompareInfo.IndexOf(haystack, needle, CompareOptions.IgnoreCase) >= 0;
        }

        internal static IEnumerable<World> WorldsOnDataCentre(DataManager data, PlayerCharacter character) {
            var dcRow = character.HomeWorld.GameData.DataCenter.Row;
            return data.GetExcelSheet<World>()!
                .Where(world => world.IsPublic && world.DataCenter.Row == dcRow);
        }
    }
}