change stats on homepage

src/BirdsiteLive/Component/NodeInfoViewComponent.cs

@@ -37,7 +37,8 @@ namespace BirdsiteLive.Component
                                       twitterAccountPolicy == ModerationTypeEnum.BlackListing,
                 WhitelistingEnabled = followerPolicy == ModerationTypeEnum.WhiteListing ||
                                       twitterAccountPolicy == ModerationTypeEnum.WhiteListing,
-                InstanceSaturation = statistics.Saturation
+                InstanceSaturation = statistics.Saturation,
+                SyncLag = statistics.SyncLag
             };
             
             //viewModel = new NodeInfoViewModel
@@ -55,5 +56,6 @@ namespace BirdsiteLive.Component
         public bool BlacklistingEnabled { get; set; }
         public bool WhitelistingEnabled { get; set; }
         public int InstanceSaturation { get; set; }
+        public TimeSpan SyncLag { get; set; }
     }
 }

src/BirdsiteLive/Services/CachedStatisticsService.cs

@@ -32,12 +32,14 @@ namespace BirdsiteLive.Services
             {
                 var twitterUserMax = _instanceSettings.MaxUsersCapacity;
                 var twitterUserCount = await _twitterUserDal.GetTwitterUsersCountAsync();
+                var twitterSyncLag = await _twitterUserDal.GetTwitterSyncLag();
                 var saturation = (int)((double)twitterUserCount / twitterUserMax * 100);
 
                 _cachedStatistics = new CachedStatistics
                 {
                     RefreshedTime = DateTime.UtcNow,
-                    Saturation = saturation
+                    Saturation = saturation,
+                    SyncLag = twitterSyncLag
                 };
             }
 
@@ -48,6 +50,7 @@ namespace BirdsiteLive.Services
     public class CachedStatistics
     {
         public DateTime RefreshedTime { get; set; }
+        public TimeSpan SyncLag { get; set; }
         public int Saturation { get; set; }
     }
 }

src/BirdsiteLive/Views/Shared/Components/NodeInfo/Default.cshtml

@@ -1,22 +1,10 @@
 @model BirdsiteLive.Component.NodeInfoViewModel
 
 <div>
-    @if (ViewData.Model.WhitelistingEnabled)
-    {
-        <a asp-controller="About" asp-action="Whitelisting" class="badge badge-light" title="What does this mean?">Whitelisting Enabled</a>
-    }
-    @if (ViewData.Model.BlacklistingEnabled)
-    {
-        <a asp-controller="About" asp-action="Blacklisting" class="badge badge-light" title="What does this mean?">Blacklisting Enabled</a>
-    }
-
     <div class="node-progress-bar">
-        <div class="node-progress-bar__label"><a asp-controller="About" asp-action="Index">Instance saturation:</a></div>
-        <div class="progress node-progress-bar__bar">
-            <div class="progress-bar 
-                 @((ViewData.Model.InstanceSaturation > 50 && ViewData.Model.InstanceSaturation < 75) ? "bg-warning ":"")
-                 @((ViewData.Model.InstanceSaturation > 75 && ViewData.Model.InstanceSaturation < 100) ? "bg-danger ":"")
-                 @((ViewData.Model.InstanceSaturation > 100) ? "bg-saturation-danger ":"")" style="width: @ViewData.Model.InstanceSaturation%">@ViewData.Model.InstanceSaturation%</div>
-        </div>
+        <div class="node-progress-bar__label">
+            <a asp-controller="About" asp-action="Index">Service load:</a>
+            @Math.Ceiling(ViewData.Model.SyncLag.TotalMinutes) minutes to fetch all twitter users 
+         </div>
     </div>
 </div>

src/DataAccessLayers/BirdsiteLive.DAL.Postgres/DataAccessLayers/TwitterUserPostgresDal.cs

@@ -85,6 +85,17 @@ namespace BirdsiteLive.DAL.Postgres.DataAccessLayers
             };
         }
 
+        public async Task<TimeSpan> GetTwitterSyncLag()
+        {
+            var query = $"SELECT max(lastsync) - min(lastsync) as diff FROM (SELECT unnest(followings) as follow FROM followers GROUP BY follow) AS f INNER JOIN twitter_users ON f.follow=twitter_users.id;";
+
+            using (var dbConnection = Connection)
+            {
+                var result = (await dbConnection.QueryAsync<TimeSpan>(query)).FirstOrDefault();
+                return result;
+            }
+        }
+
         public async Task<int> GetTwitterUsersCountAsync()
         {
             var query = $"SELECT COUNT(*) FROM {_settings.TwitterUserTableName}";

src/DataAccessLayers/BirdsiteLive.DAL/Contracts/ITwitterUserDal.cs

@@ -18,6 +18,7 @@ namespace BirdsiteLive.DAL.Contracts
         Task DeleteTwitterUserAsync(string acct);
         Task DeleteTwitterUserAsync(int id);
         Task<int> GetTwitterUsersCountAsync();
+        Task<TimeSpan> GetTwitterSyncLag();
         Task<int> GetFailingTwitterUsersCountAsync();
     }
 }