[FA-misc] Mass transit overhaul, needs testing and review

FictionArchive.Service.ReportingService/Services/Consumers/JobStateChangedEventConsumer.cs

@@ -0,0 +1,74 @@
+using System.Text.Json;
+using FictionArchive.Service.ReportingService.Models.Database;
+using FictionArchive.Service.Shared.MassTransit.Contracts;
+using MassTransit;
+
+namespace FictionArchive.Service.ReportingService.Services.Consumers;
+
+public class JobStateChangedEventConsumer : IConsumer<JobStateChangedEvent>
+{
+    private readonly ReportingServiceDbContext _dbContext;
+    private readonly ILogger<JobStateChangedEventConsumer> _logger;
+
+    public JobStateChangedEventConsumer(
+        ReportingServiceDbContext dbContext,
+        ILogger<JobStateChangedEventConsumer> logger)
+    {
+        _dbContext = dbContext;
+        _logger = logger;
+    }
+
+    public async Task Consume(ConsumeContext<JobStateChangedEvent> context)
+    {
+        var @event = context.Message;
+
+        var job = await _dbContext.Jobs.FindAsync(@event.JobId);
+
+        if (job == null)
+        {
+            job = new Job
+            {
+                Id = @event.JobId,
+                JobType = @event.JobType,
+                Status = @event.ToState,
+                CreatedTime = @event.Timestamp,
+                UpdatedTime = @event.Timestamp,
+                Metadata = @event.Metadata != null
+                    ? JsonSerializer.SerializeToDocument(@event.Metadata)
+                    : null
+            };
+            _dbContext.Jobs.Add(job);
+        }
+        else
+        {
+            job.Status = @event.ToState;
+            job.UpdatedTime = @event.Timestamp;
+
+            if (@event.Error != null)
+            {
+                job.ErrorMessage = @event.Error;
+            }
+
+            if (@event.ToState is "Completed" or "Failed")
+            {
+                job.CompletedTime = @event.Timestamp;
+            }
+        }
+
+        var historyEntry = new JobHistoryEntry
+        {
+            JobId = @event.JobId,
+            FromState = @event.FromState,
+            ToState = @event.ToState,
+            Message = @event.Message,
+            Error = @event.Error,
+            Timestamp = @event.Timestamp
+        };
+        _dbContext.JobHistoryEntries.Add(historyEntry);
+
+        await _dbContext.SaveChangesAsync();
+
+        _logger.LogDebug("Recorded job state change: {JobId} {FromState} -> {ToState}",
+            @event.JobId, @event.FromState, @event.ToState);
+    }
+}