From 7b76f2c238d47aaeacf4399f013dc8ca59c12e11 Mon Sep 17 00:00:00 2001
From: Kyle Spearrin <kyle.spearrin@gmail.com>
Date: Thu, 28 Jul 2016 21:41:45 -0400
Subject: [PATCH] Incremental sync only every 30 minutes

---
 src/App/Abstractions/Services/ISyncService.cs |  4 +++-
 src/App/App.cs                                |  2 +-
 src/App/Services/SyncService.cs               | 11 +++++++++++
 3 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/src/App/Abstractions/Services/ISyncService.cs b/src/App/Abstractions/Services/ISyncService.cs
index 15f2abe81..8515bf906 100644
--- a/src/App/Abstractions/Services/ISyncService.cs
+++ b/src/App/Abstractions/Services/ISyncService.cs
@@ -1,4 +1,5 @@
-using System.Threading.Tasks;
+using System;
+using System.Threading.Tasks;
 
 namespace Bit.App.Abstractions
 {
@@ -9,6 +10,7 @@ namespace Bit.App.Abstractions
         Task<bool> SyncDeleteFolderAsync(string id);
         Task<bool> SyncDeleteSiteAsync(string id);
         Task<bool> FullSyncAsync();
+        Task<bool> IncrementalSyncAsync(TimeSpan syncThreshold);
         Task<bool> IncrementalSyncAsync();
     }
 }
diff --git a/src/App/App.cs b/src/App/App.cs
index 7f0180b0a..6e05a5bc3 100644
--- a/src/App/App.cs
+++ b/src/App/App.cs
@@ -125,7 +125,7 @@ namespace Bit.App
                 {
                     try
                     {
-                        await _syncService.IncrementalSyncAsync();
+                        await _syncService.IncrementalSyncAsync(TimeSpan.FromMinutes(30));
                         break;
                     }
                     catch(WebException)
diff --git a/src/App/Services/SyncService.cs b/src/App/Services/SyncService.cs
index 5678fe538..604b670fe 100644
--- a/src/App/Services/SyncService.cs
+++ b/src/App/Services/SyncService.cs
@@ -167,6 +167,17 @@ namespace Bit.App.Services
             return true;
         }
 
+        public async Task<bool> IncrementalSyncAsync(TimeSpan syncThreshold)
+        {
+            DateTime? lastSync = _settings.GetValueOrDefault<DateTime?>(LastSyncKey);
+            if(lastSync != null && DateTime.UtcNow - lastSync.Value < syncThreshold)
+            {
+                return false;
+            }
+
+            return await IncrementalSyncAsync();
+        }
+
         public async Task<bool> IncrementalSyncAsync()
         {
             if(!_authService.IsAuthenticated)