RegionBuilder.cs

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using System;
using System.Collections.Generic;
using System.Linq;
using UnityEngine;
 
namespace WKLib.API.Gamemodes;
 
public class RegionBuilder
{
    private string _name = "New Region";
    private List<M_Subregion> _subregions = [];
    private bool _hasStartingLevel = true;
 
    public RegionBuilder WithName(string regionName)
    {
        _name = regionName;
        return this;
    }
 
    public RegionBuilder WithSubregions(List<M_Subregion> subregions)
    {
        _subregions = subregions ?? [];
        return this;
    }
 
    [Obsolete("Game Handles this automatically, Let the game decide")]
    public RegionBuilder WithStartingLevel(bool hasStartingLevel)
    {
        _hasStartingLevel = hasStartingLevel;
        return this;
    }
 
    public M_Region Build()
    {
        var region = ScriptableObject.CreateInstance<M_Region>();
        region.regionName = _name;
        region.name = _name;
 
        List<M_Region.SubregionGroup> subRegGroups = [];
        foreach (var subregion in _subregions)
        {
            subRegGroups.Add(new M_Region.SubregionGroup(){subregions = [subregion]});
        }
        
        // Wrap the subregions in SubregionGroups
        region.subregionGroups = subRegGroups;
 
        if (_subregions.Count > 1 && _subregions[0].levelReferences.Count > 1)
        {
            region.transitionLevels =
            [
                new M_Region.TransitionLevels() {
                    fromRegion = _name,
                    levels = [_subregions[0].levelReferences[^1].level]
                }
            ];
            
            _subregions[0].levelReferences.RemoveAt(_subregions[0].levelReferences.Count - 1);
        }
        
        region.regionHeight = _subregions.Sum(sr => sr.subregionHeight);
        
 
        // pick a default start level - M1_Intro_01 (if exists)
        var defaultPrefab = CL_AssetManager.GetFullCombinedAssetDatabase().levelAssets
            .FirstOrDefault(pref => pref.level.levelName == "M1_Intro_01");
        var defaultLevelComp = defaultPrefab?.level;
        if (defaultLevelComp is not null && _hasStartingLevel)
        {
            region.startLevels = [defaultLevelComp];
        }
 
        region.regionOrder = M_Region.RegionOrder.playlist;
        region.introText = _name;
 
        // Flatten all sessionEventLists from subregions
        region.sessionEventLists = _subregions
            .SelectMany(sr => sr.sessionEventLists)
            .ToList();
 
        return region;
    }
}