OTG_5/Assets/_Scripts/QuestSystem/QuestState.cs

using System;
using System.Collections.Generic;

[Serializable]
public class QuestState
{
    public QuestData questData;
    public QuestStatus status;
    public List<int> goalProgress = new List<int>();

    public QuestState(QuestData quest)
    {
        questData = quest;
        status = QuestStatus.Active;

        int goalCount = quest != null && quest.goals != null ? quest.goals.Count : 0;
        for (int i = 0; i < goalCount; i++)
        {
            goalProgress.Add(0);
        }
    }

    public bool IsGoalComplete(int index)
    {
        if (questData == null || index < 0 || index >= questData.goals.Count)
        {
            return false;
        }

        return GetProgress(index) >= questData.goals[index].requiredAmount;
    }

    public int GetProgress(int index)
    {
        if (index < 0 || index >= goalProgress.Count)
        {
            return 0;
        }

        return goalProgress[index];
    }

    public void AddProgress(int index, int amount)
    {
        if (questData == null || index < 0 || index >= questData.goals.Count || amount <= 0)
        {
            return;
        }

        while (goalProgress.Count < questData.goals.Count)
        {
            goalProgress.Add(0);
        }

        int required = questData.goals[index].requiredAmount;
        goalProgress[index] = Math.Min(required, goalProgress[index] + amount);
    }

    public bool AreAllGoalsComplete()
    {
        if (questData == null || questData.goals == null || questData.goals.Count == 0)
        {
            return false;
        }

        for (int i = 0; i < questData.goals.Count; i++)
        {
            if (!IsGoalComplete(i))
            {
                return false;
            }
        }

        return true;
    }
}