Update the Event Flushing Mechanism to save in disk

Runtime/Aptabase.cs

@@ -103,7 +103,7 @@ public static void OnApplicationFocus(bool hasFocus)
             }
             else
             {
-                Flush();
+                _dispatcher.FlushOrSaveToDisk();
                 StopPolling();
             }
         }

Runtime/Dispatcher/Dispatcher.cs

@@ -1,4 +1,5 @@
 using System.Collections.Generic;
+using System.Linq;
 using System.Threading.Tasks;
 using AptabaseSDK.TinyJson;
 using UnityEngine;
@@ -8,6 +9,7 @@ namespace AptabaseSDK
     public class Dispatcher: IDispatcher
     {
         private const string EVENTS_ENDPOINT = "/api/v0/events";
+        private const string APTABASE_KEY = "aptabase_key";
 
         private const int MAX_BATCH_SIZE = 25;
 
@@ -21,14 +23,19 @@ public class Dispatcher: IDispatcher
 
         public Dispatcher(string appKey, string baseURL, EnvironmentInfo env)
         {
+            var cachedEventsJson = PlayerPrefs.GetString(APTABASE_KEY);
+            var cacheEvents = string.IsNullOrEmpty(cachedEventsJson) ? new List<Event>() : cachedEventsJson.FromJson<List<Event>>();
+
             //create event queue
-            _events = new Queue<Event>();
+            _events = new Queue<Event>(cacheEvents);
 
             //web request setup information
             _apiURL = $"{baseURL}{EVENTS_ENDPOINT}";
             _appKey = appKey;
             _environment = env;
             _webRequestHelper = new WebRequestHelper();
+
+            PlayerPrefs.DeleteKey(APTABASE_KEY);
         }
 
         public void Enqueue(Event data)
@@ -42,7 +49,7 @@ private void Enqueue(List<Event> data)
                 _events.Enqueue(eventData);
         }
 
-        public async void Flush()
+        public async Task Flush()
         {
             if (_flushInProgress || _events.Count <= 0)
                 return;
@@ -75,9 +82,18 @@ public async void Flush()
 
             _flushInProgress = false;
         }
-
+
+        public async Task FlushOrSaveToDisk()
+        {
+            await Flush();
+
+            PlayerPrefs.SetString(APTABASE_KEY, _events.ToList().ToJson());
+        }
+
         private static async Task<bool> SendEvents(List<Event> events)
         {
+            if(Application.internetReachability == NetworkReachability.NotReachable) return false;
+
             var webRequest = _webRequestHelper.CreateWebRequest(_apiURL, _appKey, _environment, events.ToJson());
             var result = await _webRequestHelper.SendWebRequestAsync(webRequest);
             return result;

Runtime/Dispatcher/IDispatcher.cs

@@ -1,9 +1,13 @@
+using System.Threading.Tasks;
+
 namespace AptabaseSDK
 {
     public interface IDispatcher
     {
-        public void Enqueue(Event data);
+        void Enqueue(Event data);
 
-        public void Flush();
+        Task Flush();
+
+        Task FlushOrSaveToDisk();
     }
 }

Runtime/Dispatcher/WebGLDispatcher.cs

@@ -1,12 +1,15 @@
 using System.Collections.Generic;
+using System.Linq;
 using System.Threading.Tasks;
 using AptabaseSDK.TinyJson;
+using UnityEngine;
 
 namespace AptabaseSDK
 {
     public class WebGLDispatcher: IDispatcher
     {
         private const string EVENT_ENDPOINT = "/api/v0/event";
+        private const string APTABASE_KEY = "aptabase_key";
 
         private static string _apiURL;
         private static WebRequestHelper _webRequestHelper;
@@ -18,20 +21,24 @@ public class WebGLDispatcher: IDispatcher
 
         public WebGLDispatcher(string appKey, string baseURL, EnvironmentInfo env)
         {
+            var cachedEventsJson = PlayerPrefs.GetString(APTABASE_KEY);
+            var cacheEvents = string.IsNullOrEmpty(cachedEventsJson) ? new List<Event>() : cachedEventsJson.FromJson<List<Event>>();
+
             //create event queue
-            _events = new Queue<Event>();
+            _events = new Queue<Event>(cacheEvents);
 
             //web request setup information
             _apiURL = $"{baseURL}{EVENT_ENDPOINT}";
             _appKey = appKey;
             _environment = env;
             _webRequestHelper = new WebRequestHelper();
+
+            PlayerPrefs.DeleteKey(APTABASE_KEY);
         }
 
         public void Enqueue(Event data)
         {
             _events.Enqueue(data);
-            Flush();
         }
 
         private void Enqueue(List<Event> data)
@@ -40,7 +47,7 @@ private void Enqueue(List<Event> data)
                 _events.Enqueue(eventData);
         }
 
-        public async void Flush()
+        public async Task Flush()
         {
             if (_flushInProgress || _events.Count <= 0)
                 return;
@@ -69,9 +76,18 @@ public async void Flush()
 
             _flushInProgress = false;
         }
+
+        public async Task FlushOrSaveToDisk()
+        {
+            await Flush();
+
+            PlayerPrefs.SetString(APTABASE_KEY, _events.ToList().ToJson());
+        }
 
         private static async Task<bool> SendEvent(Event eventData)
         {
+            if(Application.internetReachability == NetworkReachability.NotReachable) return false;
+
             var webRequest = _webRequestHelper.CreateWebRequest(_apiURL, _appKey, _environment, eventData.ToJson());
             var result = await _webRequestHelper.SendWebRequestAsync(webRequest);
             return result;