database maintenance jobs setup in admin

src/Admin/Jobs/JobsHostedService.cs

@@ -0,0 +1,46 @@
+using System;
+using System.Collections.Generic;
+using System.Threading;
+using System.Threading.Tasks;
+using Bit.Core.Jobs;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Logging;
+using Quartz;
+
+namespace Bit.Admin.Jobs
+{
+    public class JobsHostedService : BaseJobsHostedService
+    {
+        public JobsHostedService(
+            IServiceProvider serviceProvider,
+            ILogger<JobsHostedService> logger,
+            ILogger<JobListener> listenerLogger)
+            : base(serviceProvider, logger, listenerLogger) { }
+
+        public override async Task StartAsync(CancellationToken cancellationToken)
+        {
+            var everySaturdayAtMidnightTrigger = TriggerBuilder.Create()
+                .StartNow()
+                .WithCronSchedule("0 0 0 ? * SAT")
+                .Build();
+            var everySundayAtMidnightTrigger = TriggerBuilder.Create()
+                .StartNow()
+                .WithCronSchedule("0 0 0 ? * SUN")
+                .Build();
+
+            Jobs = new List<Tuple<Type, ITrigger>>
+            {
+                new Tuple<Type, ITrigger>(typeof(DatabaseUpdateStatisticsJob), everySaturdayAtMidnightTrigger),
+                new Tuple<Type, ITrigger>(typeof(DatabaseRebuildlIndexesJob), everySundayAtMidnightTrigger)
+            };
+
+            await base.StartAsync(cancellationToken);
+        }
+
+        public static void AddJobsServices(IServiceCollection services)
+        {
+            services.AddTransient<DatabaseUpdateStatisticsJob>();
+            services.AddTransient<DatabaseRebuildlIndexesJob>();
+        }
+    }
+}