#67 added blob storage service + endpoints for profile picture. WIP

src/Infrastructure/AzureBlob/AzureBlobStorageService.cs

@@ -0,0 +1,74 @@
+using Azure.Storage.Blobs;
+using Azure.Storage.Blobs.Models;
+using Hutopy.Application.Common.Interfaces;
+using Microsoft.Extensions.Configuration;
+
+namespace Hutopy.Infrastructure.AzureBlob;
+
+public class AzureBlobStorageService : IAzureBlobStorageService
+{
+    private readonly BlobServiceClient _blobServiceClient;
+
+    public AzureBlobStorageService(IConfiguration configuration)
+    {
+        var connectionString = configuration["Azure-Blob-Connection-String"] ?? "";
+        _blobServiceClient = new BlobServiceClient(connectionString);
+
+    }
+
+    /// <summary>
+    /// Upload a file to microsoft azure blob storage.
+    /// </summary>
+    /// <param name="blobName">The blob name (path within the container, include the file name).</param>
+    /// <param name="containerName">The name of the container where the file is stored.</param>
+    /// <param name="fileStream">The stream.</param>
+    /// <returns></returns>
+    public async Task<string> UploadFileAsync(string containerName, string blobName, Stream fileStream)
+    {
+        // Get a reference to a container
+        var containerClient = _blobServiceClient.GetBlobContainerClient(containerName);
+        
+        // Create the container if it does not exist
+        await containerClient.CreateIfNotExistsAsync();
+
+        // Get a reference to a blob
+        var blobClient = containerClient.GetBlobClient(blobName);
+
+        // Upload the file
+        await blobClient.UploadAsync(fileStream, true);
+        
+        // Return the URI of the uploaded blob
+        return blobClient.Uri.ToString();
+    }
+
+    /// <summary>
+    /// Download a file to microsoft azure blob storage.
+    /// </summary>
+    /// <param name="blobName">The blob name (path within the container).</param>
+    /// <param name="containerName">The name of the container where the file is stored. (users)</param>
+    /// <returns></returns>
+    public async Task<MemoryStream> DownloadFileAsync(string containerName, string blobName)
+    {
+        // Get a reference to a container
+        var containerClient = _blobServiceClient.GetBlobContainerClient(containerName);
+    
+        // Get a reference to a blob
+        var blobClient = containerClient.GetBlobClient(blobName);
+
+        try
+        {
+            // Download the blob to a stream
+            BlobDownloadInfo download = await blobClient.DownloadAsync();
+            MemoryStream memoryStream = new();
+            await download.Content.CopyToAsync(memoryStream);
+            memoryStream.Position = 0; // Ensure the stream is at the beginning
+
+            return memoryStream;
+        }
+        catch (Exception ex)
+        {
+            // Log and handle the exception as needed
+            throw new ApplicationException("Error downloading file from Azure Blob Storage.", ex);
+        }
+    }
+}