QuestManager.cs

using System.Collections.Generic;
using Extensions.Patterns;
using Extensions.Singleton;

namespace QuestSystem
{
    /**
     * Manages quest objectives and their instances within the game. Persists across scene loads and
     * provides methods to retrieve or create quest objective instances and check their completion status.
     */
    public class QuestManager : LazySingleton<QuestManager>
    {

        private readonly Dictionary<QuestObjective, QuestObjectiveInstance> questInstances = new();

        public QuestObjectiveInstance GetOrCreateInstance(QuestObjective objective)
        {
            if (!questInstances.TryGetValue(objective, out var instance))
            {
                instance = new QuestObjectiveInstance(objective);
                questInstances[objective] = instance;
            }

            return instance;
        }

        public bool IsObjectiveComplete(QuestObjective objective, int times = 1)
        {
            return questInstances.TryGetValue(objective, out var state) && state.ConditionsMet(times);
        }
    }
}