fix issue #170 which is related to the host user not being part of the Registered Users role

Oqtane.Server/Infrastructure/HostedServiceBase.cs

@@ -0,0 +1,92 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Hosting;
+using Oqtane.Models;
+using Oqtane.Repository;
+using Oqtane.Shared;
+
+namespace Oqtane.Infrastructure
+{
+    public abstract class HostedServiceBase : IHostedService, IDisposable
+    {
+        private Task ExecutingTask;
+        private readonly CancellationTokenSource CancellationTokenSource = new CancellationTokenSource();
+        private readonly IServiceScopeFactory ServiceScopeFactory;
+
+        public HostedServiceBase(IServiceScopeFactory ServiceScopeFactory)
+        {
+            this.ServiceScopeFactory = ServiceScopeFactory;
+        }
+
+        // abstract method must be overridden by job
+        public abstract void ExecuteJob(IServiceProvider provider);
+
+
+        protected async Task ExecuteAsync(CancellationToken stoppingToken)
+        {
+            try
+            {
+                while (!stoppingToken.IsCancellationRequested)
+                {
+                    // allows consumption of scoped services 
+                    using (var scope = ServiceScopeFactory.CreateScope())
+                    {
+                        string JobType = Utilities.GetFullTypeName(this.GetType().AssemblyQualifiedName);
+                        IScheduleRepository ScheduleRepository = scope.ServiceProvider.GetRequiredService<IScheduleRepository>();
+                        List<Schedule> schedules = ScheduleRepository.GetSchedules().ToList();
+                        Schedule schedule = schedules.Where(item => item.JobType == JobType).FirstOrDefault();
+                        if (schedule != null && schedule.IsActive)
+                        {
+                            ExecuteJob(scope.ServiceProvider);
+                        }
+                    }
+
+                    await Task.Delay(TimeSpan.FromMinutes(1), stoppingToken);
+                }
+            }
+            catch
+            {
+                // can occur during the initial installation as there is no DBContext
+            }
+
+        }
+
+        public Task StartAsync(CancellationToken cancellationToken)
+        {
+            ExecutingTask = ExecuteAsync(CancellationTokenSource.Token);
+
+            if (ExecutingTask.IsCompleted)
+            {
+                return ExecutingTask;
+            }
+
+            return Task.CompletedTask;
+        }
+
+        public async Task StopAsync(CancellationToken CancellationToken)
+        {
+            if (ExecutingTask == null)
+            {
+                return;
+            }
+
+            try
+            {
+                CancellationTokenSource.Cancel();
+            }
+            finally
+            {
+                await Task.WhenAny(ExecutingTask, Task.Delay(Timeout.Infinite, CancellationToken));
+            }
+        }
+
+        public void Dispose()
+        {
+            CancellationTokenSource.Cancel();
+        }
+    }
+}