Initial commit carried over from private repo. This is V2.

code/MessengerApi/Handlers/HousekeepingHandler.cs

@@ -0,0 +1,47 @@
+using MessengerApi.Configuration.Model;
+using MessengerApi.Contracts.Factories;
+using Microsoft.EntityFrameworkCore;
+
+namespace MessengerApi.Handlers
+{
+    public class HousekeepingHandler
+    {
+        private readonly ILogger logger;
+        private readonly MessengerConfiguration configuration;
+        private readonly IDbContextFactory dbContextFactory;
+
+        public HousekeepingHandler(
+            ILogger logger,
+            IDbContextFactory dbContextFactory,
+            MessengerConfiguration configuration)
+        {
+            this.logger = logger;
+            this.dbContextFactory = dbContextFactory;
+            this.configuration = configuration;
+        }
+
+        public async Task RemoveOldMessages()
+        {
+            this.logger.Trace($"Executing {nameof(this.RemoveOldMessages)}.");
+
+            var timestamp = DateTime.UtcNow;
+            var cutoff = timestamp.AddMinutes(-this.configuration.HousekeepingMessageAgeInMinutes);
+            using var ctx = this.dbContextFactory.CreateDbContext();
+            await ctx.Messages.Where(x => x.CreatedUtc < cutoff).ExecuteDeleteAsync();
+
+            if (this.configuration.HousekeepingMessageState != Configuration.Enums.HousekeepingMessageStates.None)
+            {
+                this.logger.Trace($"Executing additional message state cleaning in {nameof(this.RemoveOldMessages)}.");
+
+                if (this.configuration.HousekeepingMessageState == Configuration.Enums.HousekeepingMessageStates.Delivered)
+                {
+                    await ctx.Messages.Where(x => x.IsDelivered).ExecuteDeleteAsync();
+                }
+                else if (this.configuration.HousekeepingMessageState == Configuration.Enums.HousekeepingMessageStates.Acknowledged)
+                {
+                    await ctx.Messages.Where(x => x.IsAcknowledged).ExecuteDeleteAsync();
+                }
+            }
+        }
+    }
+}