Buff.cs

// Buffs are like Skills, but for the Buffs list.
using System;
using System.Collections.Generic;
using System.Text;
using UnityEngine;
using Mirror;

namespace uMMORPG
{
    [Serializable]
    public partial struct Buff
    {
        // hashcode used to reference the real ScriptableSkill (can't link to data
        // directly because synclist only supports simple types). and syncing a
        // string's hashcode instead of the string takes WAY less bandwidth.
        public int hash;

        // dynamic stats (cooldowns etc.)
        public int level;
        public double buffTimeEnd; // server time. double for long term precision.

        // constructors
        public Buff(BuffSkill data, int level)
        {
            hash = data.name.GetStableHashCode();
            this.level = level;
            buffTimeEnd = NetworkTime.time + data.buffTime.Get(level); // start buff immediately
        }

        // wrappers for easier access
        public BuffSkill data
        {
            get
            {
                // show a useful error message if the key can't be found
                // note: ScriptableSkill.OnValidate 'is in resource folder' check
                //       causes Unity SendMessage warnings and false positives.
                //       this solution is a lot better.
                if (!ScriptableSkill.All.ContainsKey(hash))
                    throw new KeyNotFoundException("There is no ScriptableSkill with hash=" + hash + ". Make sure that all ScriptableSkills are in the Resources folder so they are loaded properly.");
                return (BuffSkill)ScriptableSkill.All[hash];
            }
        }
        public string name => data.name;
        public Sprite image => data.image;
        public float buffTime => data.buffTime.Get(level);
        public bool remainAfterDeath => data.remainAfterDeath;
        public int healthMaxBonus => data.healthMaxBonus.Get(level);
        public int manaMaxBonus => data.manaMaxBonus.Get(level);
        public int damageBonus => data.damageBonus.Get(level);
        public int defenseBonus => data.defenseBonus.Get(level);
        public float blockChanceBonus => data.blockChanceBonus.Get(level);
        public float criticalChanceBonus => data.criticalChanceBonus.Get(level);
        public float healthPercentPerSecondBonus => data.healthPercentPerSecondBonus.Get(level);
        public float manaPercentPerSecondBonus => data.manaPercentPerSecondBonus.Get(level);
        public float speedBonus => data.speedBonus.Get(level);
        public int maxLevel => data.maxLevel;

        // tooltip - runtime part
        public string ToolTip()
        {
            // we use a StringBuilder so that addons can modify tooltips later too
            // ('string' itself can't be passed as a mutable object)
            StringBuilder tip = new StringBuilder(data.ToolTip(level));

            // addon system hooks
            Utils.InvokeMany(typeof(Buff), this, "ToolTip_", tip);

            return tip.ToString();
        }

        public float BuffTimeRemaining()
        {
            // how much time remaining until the buff ends? (using server time)
            return NetworkTime.time >= buffTimeEnd ? 0 : (float)(buffTimeEnd - NetworkTime.time);
        }
    }
}