Implement the retailer statistics report

docker/api/Dockerfile

@@ -1,4 +1,4 @@
 FROM mcr.microsoft.com/dotnet/core/aspnet:latest
-COPY musiccatalogue.api-1.22.0.0 /opt/musiccatalogue.api-1.22.0.0
-WORKDIR /opt/musiccatalogue.api-1.22.0.0/bin
+COPY musiccatalogue.api-1.23.0.0 /opt/musiccatalogue.api-1.23.0.0
+WORKDIR /opt/musiccatalogue.api-1.23.0.0/bin
 ENTRYPOINT [ "./MusicCatalogue.Api" ]

sql/Summarise By Retailer.sql

@@ -0,0 +1,23 @@
+WITH RETAILER_SPEND ( Id, Name, IsWishListItem, Spend ) AS
+(
+    SELECT          r.Id,
+                    r.Name,
+                    IFNULL( al.IsWishListItem, 0),
+                    SUM( IFNULL( al.Price, 0 ) )
+    FROM            ALBUMS al
+    LEFT OUTER JOIN RETAILERS r ON r.Id = al.RetailerId
+    GROUP BY        r.Id, r.Name, IFNULL( al.IsWishListItem, 0)
+)
+SELECT      RANK() OVER ( ORDER BY rsp.Name ASC ) AS "Id",
+            rsp.Name,
+            COUNT( DISTINCT a.Id ) AS "Artists",
+            COUNT( DISTINCT al.Id ) AS "Albums",
+            COUNT( DISTINCT t.Id ) AS "Tracks",
+            rsp.Spend
+FROM        RETAILER_SPEND rsp
+INNER JOIN  ALBUMS al ON al.RetailerId = rsp.Id
+INNER JOIN  TRACKS t ON t.AlbumId = al.Id
+INNER JOIN  ARTISTS a ON a.Id = al.ArtistId
+WHERE       rsp.IsWishListItem = 0
+AND         IFNULL( al.IsWishListItem, 0 ) = 0
+GROUP BY    rsp.Name;

src/MusicCatalogue.Api/Controllers/ReportsController.cs

@@ -116,5 +116,26 @@ public async Task<ActionResult<List<MonthlySpend>>> GetMonthlySpendingReportAsyn
             // Convert to a list and return the results
             return results.ToList();
         }
+
+        /// <summary>
+        /// Generate the retailer statistics report
+        /// </summary>
+        /// <param name="wishlist"></param>
+        /// <returns></returns>
+        [HttpGet]
+        [Route("retailers/{wishlist}")]
+        public async Task<ActionResult<List<RetailerStatistics>>> GetRetailerStatisticsReportAsync(bool wishlist)
+        {
+            // Get the report content
+            var results = await _factory.RetailerStatistics.GenerateReportAsync(wishlist, 1, int.MaxValue);
+
+            if (!results.Any())
+            {
+                return NoContent();
+            }
+
+            // Convert to a list and return the results
+            return results.ToList();
+        }
     }
 }

src/MusicCatalogue.Api/MusicCatalogue.Api.csproj

@@ -2,9 +2,9 @@
 
   <PropertyGroup>
     <TargetFramework>net7.0</TargetFramework>
-    <ReleaseVersion>1.22.0.0</ReleaseVersion>
-    <FileVersion>1.22.0.0</FileVersion>
-    <ProductVersion>1.22.0</ProductVersion>
+    <ReleaseVersion>1.23.0.0</ReleaseVersion>
+    <FileVersion>1.23.0.0</FileVersion>
+    <ProductVersion>1.23.0</ProductVersion>
     <Nullable>enable</Nullable>
     <ImplicitUsings>enable</ImplicitUsings>
   </PropertyGroup>