Added retailer statistics export

src/MusicCatalogue.Api/Controllers/ExportController.cs

@@ -15,18 +15,20 @@ public class ExportController : Controller
         private readonly IBackgroundQueue<ArtistStatisticsExportWorkItem> _artistStatisticsQueue;
         private readonly IBackgroundQueue<GenreStatisticsExportWorkItem> _genreStatisticsQueue;
         private readonly IBackgroundQueue<MonthlySpendExportWorkItem> _monthlySpendQueue;
+        private readonly IBackgroundQueue<RetailerStatisticsExportWorkItem> _retailerStatisticsQueue;
 
         public ExportController(
             IBackgroundQueue<CatalogueExportWorkItem> catalogueQueue,
             IBackgroundQueue<ArtistStatisticsExportWorkItem> artistStatisticsQueue,
             IBackgroundQueue<GenreStatisticsExportWorkItem> genreStatisticsQueue,
-            IBackgroundQueue<MonthlySpendExportWorkItem> monthlySpendQueue
-            )
+            IBackgroundQueue<MonthlySpendExportWorkItem> monthlySpendQueue,
+            IBackgroundQueue<RetailerStatisticsExportWorkItem> retailerStatisticsQueue)
         {
             _catalogueQueue = catalogueQueue;
             _artistStatisticsQueue = artistStatisticsQueue;
             _genreStatisticsQueue = genreStatisticsQueue;
             _monthlySpendQueue = monthlySpendQueue;
+            _retailerStatisticsQueue = retailerStatisticsQueue;
         }
 
         [HttpPost]
@@ -76,5 +78,17 @@ public IActionResult ExportMonthySpendReport([FromBody] MonthlySpendExportWorkIt
             _monthlySpendQueue.Enqueue(item);
             return Accepted();
         }
+
+        [HttpPost]
+        [Route("retailerstatistics")]
+        public IActionResult ExportRetailerStatisticsReport([FromBody] RetailerStatisticsExportWorkItem item)
+        {
+            // Set the job name used in the job status record
+            item.JobName = "Retailer Statistics Export";
+
+            // Queue the work item
+            _retailerStatisticsQueue.Enqueue(item);
+            return Accepted();
+        }
     }
 }

src/MusicCatalogue.Api/Entities/RetailerStatisticsExportWorkItem.cs

@@ -0,0 +1,8 @@
+namespace MusicCatalogue.Api.Entities
+{
+    public class RetailerStatisticsExportWorkItem : BackgroundWorkItem
+    {
+        public string FileName { get; set; } = "";
+        public bool WishList { get; set; }
+    }
+}

src/MusicCatalogue.Api/Program.cs

@@ -116,6 +116,10 @@ public static void Main(string[] args)
             builder.Services.AddSingleton<IBackgroundQueue<MonthlySpendExportWorkItem>, BackgroundQueue<MonthlySpendExportWorkItem>>();
             builder.Services.AddHostedService<MonthlySpendExportService>();
 
+            // Add the retailer statistics report exporter hosted service
+            builder.Services.AddSingleton<IBackgroundQueue<RetailerStatisticsExportWorkItem>, BackgroundQueue<RetailerStatisticsExportWorkItem>>();
+            builder.Services.AddHostedService<RetailerStatisticsExportService>();
+
             // Configure JWT
             byte[] key = Encoding.ASCII.GetBytes(settings!.Secret);
             builder.Services.AddAuthentication(x =>

src/MusicCatalogue.Api/Services/RetailerStatisticsExportService.cs

@@ -0,0 +1,47 @@
+using Microsoft.Extensions.Options;
+using MusicCatalogue.Api.Entities;
+using MusicCatalogue.Api.Interfaces;
+using MusicCatalogue.Entities.Config;
+using MusicCatalogue.Entities.Interfaces;
+using MusicCatalogue.Entities.Reporting;
+using MusicCatalogue.Logic.DataExchange.Generic;
+using System.Diagnostics.CodeAnalysis;
+
+namespace MusicCatalogue.Api.Services
+{
+    [ExcludeFromCodeCoverage]
+    public class RetailerStatisticsExportService : BackgroundQueueProcessor<RetailerStatisticsExportWorkItem>
+    {
+        private readonly MusicApplicationSettings _settings;
+        public RetailerStatisticsExportService(
+            ILogger<BackgroundQueueProcessor<RetailerStatisticsExportWorkItem>> logger,
+            IBackgroundQueue<RetailerStatisticsExportWorkItem> queue,
+            IServiceScopeFactory serviceScopeFactory,
+            IOptions<MusicApplicationSettings> settings)
+            : base(logger, queue, serviceScopeFactory)
+        {
+            _settings = settings.Value;
+        }
+
+        /// <summary>
+        /// Export the retailer statistics report
+        /// </summary>
+        /// <param name="item"></param>
+        /// <param name="factory"></param>
+        /// <returns></returns>
+        protected override async Task ProcessWorkItem(RetailerStatisticsExportWorkItem item, IMusicCatalogueFactory factory)
+        {
+            // Get the report data
+            MessageLogger.LogInformation("Retrieving the retailer statistics report for export");
+            var records = await factory.RetailerStatistics.GenerateReportAsync(item.WishList, 1, int.MaxValue);
+
+            // Construct the full path to the export file
+            var filePath = Path.Combine(_settings.ReportsExportPath, item.FileName);
+
+            // Export the report
+            var exporter = new CsvExporter<RetailerStatistics>();
+            exporter.Export(records, filePath, ',');
+            MessageLogger.LogInformation("Retailer statistics report export completed");
+        }
+    }
+}