Practical recipes: state, objects, inventory and skills

using System;
using System.Threading.Tasks;
using System.Windows.Controls;
using DreamPoeBot.Loki.Bot;
using DreamPoeBot.Loki.Common;
using DreamPoeBot.Loki.Coroutine;
using DreamPoeBot.Loki.Game;
using DreamPoeBot.Loki.Game.GameData;
using log4net;
using Message = DreamPoeBot.Loki.Bot.Message;

namespace DeveloperAcademy
{
    public sealed class AcademyTasksBot : IBot
    {
        private TaskManager _tasks;
        private Coroutine _loop;
        private UserControl _control;
        public string Name => "AcademyTasksBot";
        public string Description => "Read-only task priorities: report the area first, then inspect the carried inventory.";
        public string Author => "Your name";
        public string Version => "1.0.0";
        public JsonSettings Settings => null;
        public UserControl Control => _control ?? (_control = new UserControl { Content = new TextBlock { Text = "Start this bot and watch AreaReport followed by InventoryReport. No plugins, routine or mover are driven by this isolated task example.", TextWrapping = System.Windows.TextWrapping.Wrap, Margin = new System.Windows.Thickness(12) } });
        public void Initialize() { }
        public void Deinitialize() { Stop(); }

        #region TaskHost
        public void Start()
        {
            Stop();
            _tasks = new TaskManager();
            if (!_tasks.Add(new AreaReport()) || !_tasks.Add(new InventoryReport()))
                throw new InvalidOperationException("Could not register the teaching tasks.");
            try { _tasks.Start(); _loop = new Coroutine(Run); }
            catch { Stop(); throw; }
        }
        public void Tick()
        {
            try
            {
                _tasks?.Tick();
                if (_loop != null && !_loop.IsFinished) _loop.Resume();
            }
            catch { Stop(); throw; }
        }
        private async Task Run()
        {
            while (true)
            {
                if (LokiPoe.IsInGame && LokiPoe.Me != null)
                    await _tasks.Run(TaskGroup.Enabled, RunBehavior.UntilHandled);
                await Coroutine.Yield();
            }
        }
        public void Stop()
        {
            var loop = _loop;
            _loop = null;
            try { loop?.Dispose(); }
            finally { var tasks = _tasks; _tasks = null; tasks?.Stop(); }
        }
        #endregion
        public MessageResult Message(Message message) => _tasks?.SendMessage(TaskGroup.Enabled, message) ?? MessageResult.Unprocessed;
        public Task<LogicResult> Logic(Logic logic) => Task.FromResult(LogicResult.Unprovided);
    }

    internal sealed class AreaReport : ITask
    {
        private static readonly ILog Log = Logger.GetLoggerInstanceForType();
        private uint? _lastAreaHash;
        private string _lastAreaId;
        public string Name => "AreaReport";
        public string Description => "Higher priority: report a changed area instance or local zone once.";
        public string Author => "Your name";
        public string Version => "1.0.0";
        public void Start() { _lastAreaHash = null; _lastAreaId = null; }
        public void Stop() { _lastAreaHash = null; _lastAreaId = null; }
        public void Tick() { }
        public Task<bool> Run()
        {
            if (!LokiPoe.IsInGame || LokiPoe.Me == null) return Task.FromResult(false);
            var area = LokiPoe.CurrentWorldArea;
            var hash = LokiPoe.LocalData.AreaHash;
            if (area == null || hash == 0 || (hash == _lastAreaHash && area.Id == _lastAreaId)) return Task.FromResult(false);
            _lastAreaHash = hash;
            _lastAreaId = area.Id;
            Log.Info("[AreaReport] " + area.Name + " (" + area.Id + ", instance " + hash + ")");
            return Task.FromResult(true); // This iteration is handled; lower priority tasks wait.
        }
        public MessageResult Message(Message message) => MessageResult.Unprocessed;
        public Task<LogicResult> Logic(Logic logic) => Task.FromResult(LogicResult.Unprovided);
    }

    #region InventoryTask
    internal sealed class InventoryReport : ITask
    {
        private static readonly ILog Log = Logger.GetLoggerInstanceForType();
        private readonly WaitTimer _interval = new WaitTimer(TimeSpan.FromSeconds(5));
        public string Name => "InventoryReport";
        public string Description => "Lower priority: count carried items at most once every five seconds.";
        public string Author => "Your name";
        public string Version => "1.0.0";
        public void Start() { _interval.Stop(); }
        public void Stop() { }
        public void Tick() { }
        public Task<bool> Run()
        {
            if (!_interval.IsFinished || !LokiPoe.IsInGame || LokiPoe.Me == null)
                return Task.FromResult(false);
            _interval.Reset();
            var items = LokiPoe.InstanceInfo.GetPlayerInventoryItemsBySlot(InventorySlot.Main);
            Log.Info("[InventoryReport] Carried item entries: " + items.Count);
            // Count is item entries/stacks, not stack quantities or occupied grid squares.
            // Do not retain Item wrappers across loading screens or long waits.
            return Task.FromResult(true);
        }
        public MessageResult Message(Message message) => MessageResult.Unprocessed;
        public Task<LogicResult> Logic(Logic logic) => Task.FromResult(LogicResult.Unprovided);
    }
    #endregion
}