Delete image when the corresponding model is deleted

src/AzureIoTHub.Portal/Server/Controllers/DeviceModelsController.cs

@@ -177,6 +177,9 @@ public async Task<IActionResult> Delete(string deviceModelID)
                 }
             }
 
+            // Image deletion
+            await this.deviceModelImageManager.DeleteDeviceModelImageAsync(deviceModelID);
+
             var result = await this.tableClientFactory
                 .GetDeviceTemplates()
                 .DeleteEntityAsync(DefaultPartitionKey, deviceModelID);

src/AzureIoTHub.Portal/Server/Managers/DeviceModelImageManager.cs

@@ -43,6 +43,17 @@ public async Task<Uri> ChangeDeviceModelImageAsync(string deviceModelId, Stream
             return blobClient.Uri;
         }
 
+        public async Task DeleteDeviceModelImageAsync(string deviceModelId)
+        {
+            var blobContainer = this.blobService.GetBlobContainerClient(ImageContainerName);
+
+            var blobClient = blobContainer.GetBlobClient(deviceModelId);
+
+            this.logger.LogInformation($"Deleting from Blob storage :\n\t {blobClient.Uri}\n");
+
+            await blobClient.DeleteAsync();
+        }
+
         public Uri ComputeImageUri(string deviceModelId)
         {
             var imageName = string.IsNullOrWhiteSpace(deviceModelId) ? DefaultImageName : deviceModelId;

src/AzureIoTHub.Portal/Server/Managers/IDeviceModelImageManager.cs

@@ -9,10 +9,12 @@ namespace AzureIoTHub.Portal.Server.Managers
 
     public interface IDeviceModelImageManager
     {
-        Uri ComputeImageUri(string deviceModelId);
-
         Task<Uri> ChangeDeviceModelImageAsync(string deviceModelId, Stream stream);
 
+        Task DeleteDeviceModelImageAsync(string deviceModelId);
+
+        Uri ComputeImageUri(string deviceModelId);
+
         Task InitializeDefaultImageBlob();
     }
 }