Init

Assets/Code/Infrastructure/EventBus/EventBus.cs

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+using System;
+using System.Collections.Generic;
+using Cysharp.Threading.Tasks;
+using UnityEngine;
+
+namespace Code.Infrastructure.EventBus
+{
+    public class EventBus
+    {
+        private Dictionary<Type, SubscribersList<IGlobalSubscriber>> s_Subscribers
+            = new();
+        
+        public void Subscribe(IGlobalSubscriber subscriber)
+        {
+            List<Type> subscriberTypes = EventBusHelper.GetSubscriberTypes(subscriber);
+            foreach (Type t in subscriberTypes)
+            {
+                if (!s_Subscribers.ContainsKey(t))
+                {
+                    s_Subscribers[t] = new SubscribersList<IGlobalSubscriber>();
+                }
+                s_Subscribers[t].Add(subscriber);
+            }
+        }
+        
+        public void Unsubscribe(IGlobalSubscriber subscriber)
+        {
+            List<Type> subscriberTypes = EventBusHelper.GetSubscriberTypes(subscriber);
+            foreach (Type t in subscriberTypes)
+            {
+                if (s_Subscribers.ContainsKey(t))
+                    s_Subscribers[t].Remove(subscriber);
+            }
+        }
+        
+        public void RaiseEvent<TSubscriber>(Action<TSubscriber> action)
+            where TSubscriber : class, IGlobalSubscriber
+        {
+            if (!s_Subscribers.ContainsKey(typeof(TSubscriber))) return;
+            
+            SubscribersList<IGlobalSubscriber> subscribers = s_Subscribers[typeof(TSubscriber)];
+
+            subscribers.Executing = true;
+            
+            InvokeSubscribers(action, subscribers);
+
+            subscribers.Executing = false;
+            subscribers.Cleanup();
+        }
+
+        private void InvokeSubscribers<TSubscriber>(Action<TSubscriber> action, SubscribersList<IGlobalSubscriber> subscribers)
+            where TSubscriber : class, IGlobalSubscriber
+        {
+            for ( int i = 0; i < subscribers.List.Count; i++)
+            { 
+                IGlobalSubscriber subscriber = subscribers.List[i];
+                try
+                {
+                    action.Invoke(subscriber as TSubscriber);
+                }
+                catch (Exception e)
+                {
+                    UnityEngine.Debug.LogError(e);
+                }
+            }
+        }
+    }
+}

Assets/Code/Infrastructure/EventBus/EventBus.cs.meta

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+fileFormatVersion: 2
+guid: b0547f2543ccf5e47b9ec486f35aa2df

Assets/Code/Infrastructure/EventBus/EventBusHelper.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+namespace Code.Infrastructure.EventBus
+{
+    internal static class EventBusHelper
+    {
+        private static Dictionary<Type, List<Type>> s_CashedSubscriberTypes =
+            new();
+
+        public static List<Type> GetSubscriberTypes(
+            IGlobalSubscriber globalSubscriber)
+        {
+            Type type = globalSubscriber.GetType();
+            if (s_CashedSubscriberTypes.ContainsKey(type))
+            {
+                return s_CashedSubscriberTypes[type];
+            }
+
+            List<Type> subscriberTypes = type
+                .GetInterfaces()
+                .Where(t => t.GetInterfaces()
+                    .Contains(typeof(IGlobalSubscriber)))
+                .ToList();
+
+            s_CashedSubscriberTypes[type] = subscriberTypes;
+            return subscriberTypes;
+        }
+    }
+}

Assets/Code/Infrastructure/EventBus/EventBusHelper.cs.meta

@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: ab2b1bcff76d5614dbda77a3c7b24158

Assets/Code/Infrastructure/EventBus/IGlobalSubscriber.cs

@@ -0,0 +1,5 @@
+namespace Code.Infrastructure.EventBus
+{
+    public interface IGlobalSubscriber
+    { }
+}

Assets/Code/Infrastructure/EventBus/IGlobalSubscriber.cs.meta

@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: fe414b0de24841347b03eec77d1855c0

Assets/Code/Infrastructure/EventBus/SubscribersList.cs

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+using System.Collections.Generic;
+
+namespace Code.Infrastructure.EventBus
+{
+    internal class SubscribersList<TSubscriber> where TSubscriber : class
+    {
+        private bool m_NeedsCleanUp;
+
+        public bool Executing;
+
+        public readonly List<TSubscriber> List = new(); // TODO Weakptr
+
+        public void Add(TSubscriber subscriber)
+        {
+            List.Add(subscriber);
+        }
+
+        public void Remove(TSubscriber subscriber)
+        {
+            if (Executing)
+            {
+                var i = List.IndexOf(subscriber);
+                if (i >= 0)
+                {
+                    m_NeedsCleanUp = true;
+                    List[i] = null;
+                }
+            }
+            else
+            {
+                List.Remove(subscriber);
+            }
+        }
+
+        public void Cleanup()
+        {
+            if (!m_NeedsCleanUp)
+            {
+                return;
+            }
+
+            List.RemoveAll(s => s == null);
+            m_NeedsCleanUp = false;
+        }
+    }
+}

Assets/Code/Infrastructure/EventBus/SubscribersList.cs.meta

@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: d364e9c8ac1c255428486d5892d23c1d