Merge pull request 'Strong typed keyvault response' (#5) from bugfix/strongly-typed-keyvault into development

Reviewed-on: #5

Core.BluePrint.Packages.sln

@@ -7,7 +7,7 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Core.Blueprint.KeyVault", "
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Core.Blueprint.Mongo", "Core.Blueprint.Mongo\Core.Blueprint.Mongo.csproj", "{27A8E3E1-D613-4D5B-8105-485699409F1E}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Core.Blueprint.Caching", "Core.Blueprint.Redis\Core.Blueprint.Caching.csproj", "{11F2AA11-FB98-4A33-AEE4-CD49588D2FE1}"
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Core.Blueprint.Redis", "Core.Blueprint.Redis\Core.Blueprint.Redis.csproj", "{11F2AA11-FB98-4A33-AEE4-CD49588D2FE1}"
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Core.Blueprint.Storage", "Core.Blueprint.Storage\Core.Blueprint.Storage.csproj", "{636E4520-79F9-46C8-990D-08F2D24A151C}"
 EndProject

Core.Blueprint.KeyVault/Contracts/IKeyVaultProvider.cs

@@ -22,7 +22,7 @@ namespace Core.Blueprint.KeyVault
         /// <returns>
         /// A <see cref="Tuple"/> containing a status message and a boolean indicating whether the secret was successfully deleted.
         /// </returns>
-        ValueTask<Tuple<string, bool>> DeleteSecretAsync(string secretName, CancellationToken cancellationToken);
+        ValueTask<(string Message, bool Deleted)> DeleteSecretAsync(string secretName, CancellationToken cancellationToken);
 
         /// <summary>
         /// Retrieves a secret from Azure Key Vault.
@@ -33,7 +33,7 @@ namespace Core.Blueprint.KeyVault
         /// A <see cref="Tuple"/> containing the <see cref="KeyVaultResponse"/> with secret details 
         /// and an optional error message if the secret was not found.
         /// </returns>
-        ValueTask<Tuple<KeyVaultResponse, string?>> GetSecretAsync(string secretName, CancellationToken cancellationToken);
+        ValueTask<(KeyVaultResponse Secret, string? Message)> GetSecretAsync(string secretName, CancellationToken cancellationToken);
 
         /// <summary>
         /// Updates an existing secret in Azure Key Vault. If the secret does not exist, an error is returned.
@@ -43,6 +43,6 @@ namespace Core.Blueprint.KeyVault
         /// <returns>
         /// A <see cref="Tuple"/> containing the updated <see cref="KeyVaultResponse"/> and an optional error message if the secret was not found.
         /// </returns>
-        ValueTask<Tuple<KeyVaultResponse, string>> UpdateSecretAsync(KeyVaultRequest newSecret, CancellationToken cancellationToken);
+        ValueTask<(KeyVaultResponse Secret, string? Message)> UpdateSecretAsync(KeyVaultRequest newSecret, CancellationToken cancellationToken);
     }
 }

Core.Blueprint.KeyVault/Provider/KeyVaultProvider.cs

@@ -1,10 +1,10 @@
 using Azure.Security.KeyVault.Secrets;
-using VaultSharp;
-using VaultSharp.V1.AuthMethods.Token;
 using Core.Blueprint.KeyVault.Configuration;
 using Microsoft.Extensions.Configuration;
 using System.Net.Http.Json;
+using VaultSharp;
 using VaultSharp.Core;
+using VaultSharp.V1.AuthMethods.Token;
 
 namespace Core.Blueprint.KeyVault;
 
@@ -67,7 +67,7 @@ public sealed class KeyVaultProvider : IKeyVaultProvider
     /// <returns>
     /// A <see cref="Tuple"/> containing a status message and a boolean indicating whether the secret was successfully deleted.
     /// </returns>
-    public async ValueTask<Tuple<string, bool>> DeleteSecretAsync(string secretName, CancellationToken cancellationToken)
+    public async ValueTask<(string Message, bool Deleted)> DeleteSecretAsync(string secretName, CancellationToken cancellationToken)
     {
         if (environment == "Local")
         {
@@ -88,7 +88,7 @@ public sealed class KeyVaultProvider : IKeyVaultProvider
     /// <summary>
     /// Retrieves a secret from Azure Key Vault or HashiCorp Vault.
     /// </summary>
-    public async ValueTask<Tuple<KeyVaultResponse, string?>> GetSecretAsync(string secretName, CancellationToken cancellationToken)
+    public async ValueTask<(KeyVaultResponse Secret, string? Message)> GetSecretAsync(string secretName, CancellationToken cancellationToken)
     {
         if (environment == "Local")
         {
@@ -108,7 +108,7 @@ public sealed class KeyVaultProvider : IKeyVaultProvider
             }
             catch (VaultSharp.Core.VaultApiException ex) when (ex.HttpStatusCode == System.Net.HttpStatusCode.NotFound)
             {
-                return new(new KeyVaultResponse(), "Key Not Found");
+                return new(new KeyVaultResponse { }, "Key Not Found");
             }
         }
 
@@ -126,7 +126,7 @@ public sealed class KeyVaultProvider : IKeyVaultProvider
     /// <summary>
     /// Updates an existing secret in Azure Key Vault or HashiCorp Vault. If the secret does not exist, an error is returned.
     /// </summary>
-    public async ValueTask<Tuple<KeyVaultResponse, string>> UpdateSecretAsync(KeyVaultRequest newSecret, CancellationToken cancellationToken)
+    public async ValueTask<(KeyVaultResponse Secret, string? Message)> UpdateSecretAsync(KeyVaultRequest newSecret, CancellationToken cancellationToken)
     {
         var existingSecret = await this.GetSecretAsync(newSecret.Name, cancellationToken);
         if (!string.IsNullOrEmpty(existingSecret.Item2))

Core.Blueprint.Logging/Constants/MimeTypes.cs

@@ -13,6 +13,8 @@ namespace Core.Blueprint.Logging
     /// </summary>
     public static class MimeTypes
     {
+        public const string ApplicationVersion = "1.0";
+
         /// <summary>
         /// The service application/json mime type.
         /// </summary>

Core.Blueprint.Mongo/Configuration/RegisterBlueprint.cs

@@ -4,6 +4,7 @@ using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Options;
 using MongoDB.Driver;
+using static MongoDB.Driver.WriteConcern;
 
 namespace Core.Blueprint.DAL.Mongo.Configuration
 {
@@ -23,42 +24,50 @@ namespace Core.Blueprint.DAL.Mongo.Configuration
         public static IServiceCollection AddMongoLayer(this IServiceCollection services, IConfiguration configuration)
         {
             var environment = Environment.GetEnvironmentVariable("ASPNETCORE_ENVIRONMENT") ?? string.Empty;
-
+            
             services.AddSingleton<IMongoContext, MongoContext>();
+            string ConnectionString = configuration.GetSection("ConnectionStrings:MongoDB").Value ?? string.Empty;
+            string Databasename = configuration.GetSection("MongoDb:DatabaseName").Value ?? string.Empty;
+            string Audience = string.Empty;
 
-            var ConnectionString = configuration.GetSection("ConnectionStrings:MongoDB").Value ?? string.Empty;
+            if (!environment.Equals("Local", StringComparison.OrdinalIgnoreCase))
-            var Databasename = configuration.GetSection("MongoDb:DatabaseName").Value ?? string.Empty;
+            {
-            var Audience = (environment == "Local")
+                Audience = configuration.GetSection("MongoDb:Audience").Value ?? string.Empty;
-                ? configuration.GetSection("MongoDb:LocalAudience").Value
+            }
-                : configuration.GetSection("MongoDb:Audience").Value;
 
-            if (string.IsNullOrEmpty(ConnectionString) || string.IsNullOrEmpty(Databasename) || string.IsNullOrEmpty(Audience))
+            if (string.IsNullOrEmpty(ConnectionString) || string.IsNullOrEmpty(Databasename))
+            {
                 throw new InvalidOperationException("Mongo connection is not configured correctly.");
+            }
 
-            services.Configure<MongoDbSettings>(options =>
+            services.Configure(delegate (MongoDbSettings options)
             {
                 options.ConnectionString = ConnectionString;
                 options.Databasename = Databasename;
-                options.Audience = Audience;
-            });
 
-            services.AddSingleton<IMongoClient>(serviceProvider =>
+                if (!environment.Equals("Local", StringComparison.OrdinalIgnoreCase))
+                {
+                    options.Audience = Audience;
+                }
+            });
+            services.AddSingleton((Func<IServiceProvider, IMongoClient>)delegate (IServiceProvider serviceProvider)
             {
-                var settings = serviceProvider.GetRequiredService<IOptions<MongoDbSettings>>().Value;
+                MongoDbSettings value2 = serviceProvider.GetRequiredService<IOptions<MongoDbSettings>>().Value;
-                var mongoClientSettings = MongoClientSettings.FromConnectionString(settings.ConnectionString);
+                MongoClientSettings mongoClientSettings = MongoClientSettings.FromConnectionString(value2.ConnectionString);
-                mongoClientSettings.Credential = MongoCredential.CreateOidcCredential(new AzureIdentityProvider(settings.Audience));
+
+                if (!environment.Equals("Local", StringComparison.OrdinalIgnoreCase)) 
+                {
+                    mongoClientSettings.Credential = MongoCredential.CreateOidcCredential(new AzureIdentityProvider(value2.Audience));
+                }
+                    
                 return new MongoClient(mongoClientSettings);
             });
-
+            services.AddSingleton(delegate (IServiceProvider serviceProvider)
-            services.AddSingleton<IMongoDatabase>(serviceProvider =>
             {
-                var settings = serviceProvider.GetRequiredService<IOptions<MongoDbSettings>>().Value;
+                MongoDbSettings value = serviceProvider.GetRequiredService<IOptions<MongoDbSettings>>().Value;
-                var client = serviceProvider.GetRequiredService<IMongoClient>();
+                return serviceProvider.GetRequiredService<IMongoClient>().GetDatabase(value.Databasename);
-                return client.GetDatabase(settings.Databasename);
             });
-
+            services.AddSingleton((Func<IServiceProvider, IMongoDbSettings>)((IServiceProvider serviceProvider) => serviceProvider.GetRequiredService<IOptions<MongoDbSettings>>().Value));
-            services.AddSingleton<IMongoDbSettings>(serviceProvider => serviceProvider.GetRequiredService<IOptions<MongoDbSettings>>().Value);
-
             return services;
         }
     }

Core.Blueprint.Mongo/nuget.config

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuration>
+	<packageSources>
+		<add key="Gitea" value="https://gitea.white-enciso.pro/api/packages/AgileWebs/nuget" />
+	</packageSources>
+	<packageSourceCredentials>
+		<Gitea>
+			<Username>oscarmmtz</Username>
+			<ClearTextPassword>544831e1ceaf52958e02c5de4d23cbde9e7a860a</ClearTextPassword>
+		</Gitea>
+	</packageSourceCredentials>
+</configuration>

Core.Blueprint.Redis/Adapters/CacheSettings.cs

@@ -1,4 +1,4 @@
-namespace Core.Blueprint.Caching.Adapters
+namespace Core.Blueprint.Redis
 {
     public interface ICacheSettings
     {

Core.Blueprint.Redis/Configuration/RegisterBlueprint.cs

@@ -1,10 +1,8 @@
-using Core.Blueprint.Caching.Adapters;
+using Microsoft.Extensions.Configuration;
-using Core.Blueprint.Caching.Contracts;
-using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Logging;
 
-namespace Core.Blueprint.Caching.Configuration
+namespace Core.Blueprint.Redis.Configuration
 {
     /// <summary>
     /// Provides extension methods for registering Redis-related services in the DI container.
@@ -19,32 +17,23 @@ namespace Core.Blueprint.Caching.Configuration
         /// <returns>The updated service collection.</returns>
         public static IServiceCollection AddRedis(this IServiceCollection services, IConfiguration configuration)
         {
-            // TODO for the following variable we'll need to add in the appsettings.json the following config: "UseRedisCache": true,
+            // Retrieve the Redis connection string from the configuration.
-            bool useRedis = configuration.GetValue<bool>("UseRedisCache");
+            // Get Redis configuration section
-            //TODO decide wheter to use appsettings or the following ENV variable
+            var redisConnectionString = configuration.GetSection("ConnectionStrings:Redis").Value;
-            useRedis = Environment.GetEnvironmentVariable("CORE_BLUEPRINT_PACKAGES_USE_REDIS")?.ToLower() == "true";
+            if (string.IsNullOrEmpty(redisConnectionString))
-
-            if (useRedis)
             {
-                var redisConnectionString = configuration.GetSection("ConnectionStrings:Redis").Value;
+                throw new InvalidOperationException("Redis connection is not configured.");
-                if (string.IsNullOrEmpty(redisConnectionString))
-                {
-                    throw new InvalidOperationException("Redis connection is not configured.");
-                }
-
-                services.AddSingleton<ICacheProvider>(provider =>
-                    new RedisCacheProvider(redisConnectionString, provider.GetRequiredService<ILogger<RedisCacheProvider>>()));
-            }
-            else
-            {
-                services.AddMemoryCache();
-                services.AddSingleton<ICacheProvider, MemoryCacheProvider>();
             }
 
+            // Register RedisCacheProvider
+            services.AddSingleton<IRedisCacheProvider>(provider =>
+                new RedisCacheProvider(redisConnectionString, provider.GetRequiredService<ILogger<RedisCacheProvider>>()));
+
+            // Get CacheSettings and register with the ICacheSettings interface
             var cacheSettings = configuration.GetSection("CacheSettings").Get<CacheSettings>();
             if (cacheSettings == null)
             {
-                throw new InvalidOperationException("CacheSettings section is not configured.");
+                throw new InvalidOperationException("Redis CacheSettings section is not configured.");
             }
             services.AddSingleton<ICacheSettings>(cacheSettings);
 

Core.Blueprint.Redis/Contracts/IRedisCacheProvider.cs

@@ -1,9 +1,9 @@
-namespace Core.Blueprint.Caching.Contracts
+namespace Core.Blueprint.Redis
 {
     /// <summary>
     /// Interface for managing Redis cache operations.
     /// </summary>
-    public interface ICacheProvider
+    public interface IRedisCacheProvider
     {
         /// <summary>
         /// Retrieves a cache item by its key.

Core.Blueprint.Redis/Core.Blueprint.Redis.csproj

@@ -4,11 +4,11 @@
     <TargetFramework>net8.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
+	<PackageId>Core.Blueprint.Redis</PackageId>
   </PropertyGroup>
 
   <ItemGroup>
     <PackageReference Include="Microsoft.Azure.StackExchangeRedis" Version="3.2.1" />
-    <PackageReference Include="Microsoft.Extensions.Caching.Memory" Version="9.0.5" />
     <PackageReference Include="Microsoft.Extensions.Configuration.Abstractions" Version="9.0.5" />
     <PackageReference Include="Microsoft.Extensions.Configuration.Binder" Version="9.0.5" />
     <PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="9.0.5" />

Core.Blueprint.Redis/Helpers/RedisCacheKeyHelper.cs

@@ -1,7 +1,11 @@
-using System.Text;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
 using System.Text.RegularExpressions;
+using System.Threading.Tasks;
 
-namespace Core.Blueprint.Caching.Helpers
+namespace Core.Blueprint.Redis.Helpers
 {
     /// <summary>
     /// Helper class for generating consistent and normalized cache keys.

Core.Blueprint.Redis/MemoryCacheProvider.cs

@@ -1,86 +0,0 @@
-using Core.Blueprint.Caching.Contracts;
-using Microsoft.Extensions.Logging;
-using Microsoft.Extensions.Caching.Memory;
-using System.Text.Json;
-
-namespace Core.Blueprint.Caching
-{
-    public sealed class MemoryCacheProvider : ICacheProvider
-    {
-        private readonly IMemoryCache _cache;
-        private readonly ILogger<MemoryCacheProvider> _logger;
-        public MemoryCacheProvider(IMemoryCache cache, ILogger<MemoryCacheProvider> logger)
-        {
-            _cache = cache;
-            _logger = logger;
-        }
-
-        public ValueTask<TEntity> GetAsync<TEntity>(string key)
-        {
-            if (_cache.TryGetValue(key, out var value))
-            {
-                if (value is TEntity typedValue)
-                {
-                    return ValueTask.FromResult(typedValue);
-                }
-
-                try
-                {
-                    var json = value?.ToString();
-                    var deserialized = JsonSerializer.Deserialize<TEntity>(json);
-                    return ValueTask.FromResult(deserialized);
-                }
-                catch (Exception ex)
-                {
-                    _logger.LogWarning(ex, "Error deserializing cache value for key {Key}", key);
-                }
-            }
-
-            return ValueTask.FromResult(default(TEntity));
-        }
-
-        public ValueTask SetAsync<TEntity>(string key, TEntity value, TimeSpan? expiry = null)
-        {
-            var options = new MemoryCacheEntryOptions();
-            if (expiry.HasValue)
-            {
-                options.SetAbsoluteExpiration(expiry.Value);
-            }
-
-            _cache.Set(key, value, options);
-            return ValueTask.CompletedTask;
-        }
-
-        public ValueTask RemoveAsync(string key)
-        {
-            _cache.Remove(key);
-            return ValueTask.CompletedTask;
-        }
-
-        public ValueTask<bool> ExistsAsync(string key)
-        {
-            return ValueTask.FromResult(_cache.TryGetValue(key, out _));
-        }
-
-        public ValueTask RefreshAsync(string key, TimeSpan? expiry = null)
-        {
-            // MemoryCache does not support sliding expiration refresh like Redis,
-            // so we must re-set the value manually if required.
-
-            if (_cache.TryGetValue(key, out var value))
-            {
-                _cache.Remove(key);
-
-                var options = new MemoryCacheEntryOptions();
-                if (expiry.HasValue)
-                {
-                    options.SetAbsoluteExpiration(expiry.Value);
-                }
-
-                _cache.Set(key, value, options);
-            }
-
-            return ValueTask.CompletedTask;
-        }
-    }
-}

Core.Blueprint.Redis/RedisCacheProvider.cs

@@ -1,15 +1,15 @@
 using Azure.Identity;
-using Core.Blueprint.Caching.Contracts;
 using Microsoft.Extensions.Logging;
 using StackExchange.Redis;
+using System;
 using System.Text.Json;
 
-namespace Core.Blueprint.Caching
+namespace Core.Blueprint.Redis
 {
     /// <summary>
     /// Redis cache provider for managing cache operations.
     /// </summary>
-    public sealed class RedisCacheProvider : ICacheProvider
+    public sealed class RedisCacheProvider : IRedisCacheProvider
     {
         private IDatabase _cacheDatabase = null!;
         private readonly ILogger<RedisCacheProvider> _logger;
@@ -30,20 +30,32 @@ namespace Core.Blueprint.Caching
         }
 
         /// <summary>
-        /// Initializes and establishes a connection to Redis using the provided connection string.
+        /// Initializes and establishes a connection to Redis based on the environment.
+        /// Uses a local connection in development, and Azure with token credentials in other environments.
         /// </summary>
         /// <param name="connectionString">The Redis connection string.</param>
         /// <returns>An <see cref="IDatabase"/> instance representing the Redis cache database.</returns>
-        /// <exception cref="Exception">Thrown when the connection to Redis fails.</exce
+        /// <exception cref="Exception">Thrown when the connection to Redis fails.</exception>
         async Task<IDatabase> InitializeRedisAsync(string connectionString)
         {
             try
             {
-                var configurationOptions = await ConfigurationOptions.Parse($"{connectionString}")
+                var environment = Environment.GetEnvironmentVariable("ASPNETCORE_ENVIRONMENT") ?? string.Empty;
-                    .ConfigureForAzureWithTokenCredentialAsync(new DefaultAzureCredential());
+                ConnectionMultiplexer connectionMultiplexer;
 
-                configurationOptions.AbortOnConnectFail = false;
+                if (environment.Equals("Local", StringComparison.OrdinalIgnoreCase))
-                var connectionMultiplexer = await ConnectionMultiplexer.ConnectAsync(configurationOptions);
+                {
+                    connectionMultiplexer = await ConnectionMultiplexer.ConnectAsync(connectionString);
+                }
+                else
+                {
+                    var configurationOptions = await ConfigurationOptions.Parse(connectionString)
+                        .ConfigureForAzureWithTokenCredentialAsync(new DefaultAzureCredential());
+
+                    configurationOptions.AbortOnConnectFail = false;
+
+                    connectionMultiplexer = await ConnectionMultiplexer.ConnectAsync(configurationOptions);
+                }
 
                 _logger.LogInformation("Successfully connected to Redis.");
 

Core.Blueprint.SQLServer/Configuration/RegisterBlueprint.cs

@@ -18,7 +18,9 @@ namespace Core.Blueprint.SQLServer.Configuration
         /// <returns>An updated <see cref="IServiceCollection"/> with SQL Server services registered.</returns>
         public static IServiceCollection AddSQLServer(this IServiceCollection services, IConfiguration configuration)
         {
-            var chainedCredentials = new ChainedTokenCredential(
+            var environment = Environment.GetEnvironmentVariable("ASPNETCORE_ENVIRONMENT") ?? string.Empty;
+
+                var chainedCredentials = new ChainedTokenCredential(
                     new ManagedIdentityCredential(),
                     new SharedTokenCacheCredential(),
                     new VisualStudioCredential(),

Core.Blueprint.Storage/Configuration/RegisterBlueprint.cs

@@ -11,23 +11,37 @@ namespace Core.Blueprint.Storage.Configuration
     {
         public static IServiceCollection AddBlobStorage(this IServiceCollection services, IConfiguration configuration)
         {
-
             var blobConnection = configuration.GetConnectionString("BlobStorage");
 
-            if (blobConnection == null || string.IsNullOrWhiteSpace(blobConnection))
+            if (string.IsNullOrWhiteSpace(blobConnection))
-            {
                 throw new ArgumentException("The BlobStorage configuration section is missing or empty.");
-            }
 
-            var chainedCredentials = new ChainedTokenCredential(
+            var environment = Environment.GetEnvironmentVariable("ASPNETCORE_ENVIRONMENT") ?? string.Empty;
-                    new ManagedIdentityCredential(),
+
-                    new SharedTokenCacheCredential(),
-                    new VisualStudioCredential(),
-                    new VisualStudioCodeCredential()
-                );
             services.AddAzureClients(cfg =>
             {
-                cfg.AddBlobServiceClient(new Uri(blobConnection)).WithCredential(chainedCredentials);
+                if (environment == "Local")
+                {
+                    var accountKey = configuration.GetSection("BlobStorage:AccountKey").Value;
+                    var accountName = configuration.GetSection("BlobStorage:AccountName").Value;
+
+                    if(string.IsNullOrEmpty(accountKey) && string.IsNullOrEmpty(accountName))
+                        throw new ArgumentException("The BlobStorage configuration section is missing or empty.");
+
+                    cfg.AddBlobServiceClient(configuration.GetConnectionString("BlobStorage"));
+                }
+                else
+                {
+                    var chainedCredentials = new ChainedTokenCredential(
+                        new ManagedIdentityCredential(),
+                        new SharedTokenCacheCredential(),
+                        new VisualStudioCredential(),
+                        new VisualStudioCodeCredential()
+                    );
+
+                    cfg.AddBlobServiceClient(new Uri(blobConnection))
+                        .WithCredential(chainedCredentials);
+                }
             });
 
             services.AddScoped<IBlobStorageProvider, BlobStorageProvider>();

Core.Blueprint.Storage/Contracts/IBlobStorageProvider.cs

@@ -162,7 +162,7 @@ namespace Core.Blueprint.Storage.Contracts
         /// </remarks>
         /// <exception cref="ArgumentNullException">Thrown if <paramref name="blobName"/> is null or empty.</exception>
         /// <exception cref="StorageException">Thrown if there is an issue communicating with the Azure Blob service.</exception>
-        BlobDownloadUriAdapter GenerateBlobDownloadUri(string blobName);
+        ValueTask<BlobDownloadUriAdapter?> GenerateBlobDownloadUri(string blobName);
 
         /// <summary>
         /// Retrieves the hierarchical folder structure.

Core.Blueprint.Storage/Provider/BlobStorageProvider.cs

@@ -1,4 +1,5 @@
 using Azure;
+using Azure.Storage;
 using Azure.Storage.Blobs;
 using Azure.Storage.Blobs.Models;
 using Azure.Storage.Blobs.Specialized;
@@ -6,6 +7,7 @@ using Azure.Storage.Sas;
 using Core.Blueprint.Storage.Adapters;
 using Core.Blueprint.Storage.Contracts;
 using Microsoft.Extensions.Configuration;
+using System.Threading.Tasks;
 
 namespace Core.Blueprint.Storage.Provider
 {
@@ -15,10 +17,12 @@ namespace Core.Blueprint.Storage.Provider
         private readonly BlobContainerClient _blobContainerClient;
         private readonly string _containerName;
         private readonly Trie _trie = new Trie();
+        private readonly IConfiguration _configuration;
 
         public BlobStorageProvider(BlobServiceClient blobServiceClient, IConfiguration configuration)
         {
             _blobServiceClient = blobServiceClient;
+            _configuration = configuration;
             _containerName = configuration.GetSection("BlobStorage:ContainerName").Value ?? "";
 
             if (string.IsNullOrEmpty(_containerName))
@@ -278,7 +282,8 @@ namespace Core.Blueprint.Storage.Provider
         /// </summary>
         /// <param name="blobName">The name of the blob for which the download URI is being generated.</param>
         /// <returns>
-        /// An instance of <see cref="BlobDownloadUriAdapter"/> containing the generated URI, blob name, and status.
+        /// An instance of <see cref="BlobDownloadUriAdapter"/> containing the generated URI, blob name, and status,
+        /// or <c>null</c> if the blob does not exist.
         /// </returns>
         /// <remarks>
         /// The generated URI includes a Shared Access Signature (SAS) token, which allows secure, time-limited access to the blob.
@@ -286,22 +291,36 @@ namespace Core.Blueprint.Storage.Provider
         /// </remarks>
         /// <exception cref="ArgumentNullException">Thrown if <paramref name="blobName"/> is null or empty.</exception>
         /// <exception cref="StorageException">Thrown if there is an issue communicating with the Azure Blob service.</exception>
-        public BlobDownloadUriAdapter GenerateBlobDownloadUri(string blobName)
+        public async ValueTask<BlobDownloadUriAdapter?> GenerateBlobDownloadUri(string blobName)
         {
-            var delegationKey = _blobServiceClient.GetUserDelegationKey(DateTimeOffset.UtcNow,
+            if (string.IsNullOrWhiteSpace(blobName))
-                                                                    DateTimeOffset.UtcNow.AddHours(2));
+                throw new ArgumentNullException(nameof(blobName), "Blob name cannot be null or empty.");
 
             var blob = _blobContainerClient.GetBlobClient(blobName);
 
-            var sasBuilder = new BlobSasBuilder()
+            if (!await blob.ExistsAsync())
+                return null;
+
+            var environment = Environment.GetEnvironmentVariable("ASPNETCORE_ENVIRONMENT") ?? string.Empty;
+
+            if (environment == "Local")
+            {
+                return GenerateDownloadUri(blob);
+            }
+
+            var delegationKey = await _blobServiceClient.GetUserDelegationKeyAsync(
+                DateTimeOffset.UtcNow,
+                DateTimeOffset.UtcNow.AddHours(2));
+
+            var sasBuilder = new BlobSasBuilder
             {
                 BlobContainerName = blob.BlobContainerName,
                 BlobName = blob.Name,
                 Resource = "b",
                 StartsOn = DateTimeOffset.UtcNow,
-                ExpiresOn = DateTimeOffset.UtcNow.AddMinutes(5),
+                ExpiresOn = DateTimeOffset.UtcNow.AddMinutes(5)
             };
-            sasBuilder.SetPermissions(BlobAccountSasPermissions.Read);
+            sasBuilder.SetPermissions(BlobSasPermissions.Read);
             sasBuilder.Protocol = SasProtocol.Https;
 
             var blobUriBuilder = new BlobUriBuilder(blob.Uri)
@@ -317,6 +336,45 @@ namespace Core.Blueprint.Storage.Provider
             };
         }
 
+
+        /// <summary>
+        /// Generates a download URI for a blob using a Shared Access Signature in local (Azurite) environment.
+        /// </summary>
+        /// <param name="blob">The blob client for which the URI is being generated.</param>
+        /// <returns>An instance of <see cref="BlobDownloadUriAdapter"/> containing the SAS URI and metadata.</returns>
+        private BlobDownloadUriAdapter GenerateDownloadUri(BlobClient blob)
+        {
+            var sasBuilder = new BlobSasBuilder
+            {
+                BlobContainerName = blob.BlobContainerName,
+                BlobName = blob.Name,
+                Resource = "b",
+                StartsOn = DateTimeOffset.UtcNow,
+                ExpiresOn = DateTimeOffset.UtcNow.AddMinutes(5)
+            };
+            sasBuilder.SetPermissions(BlobSasPermissions.Read);
+            sasBuilder.Protocol = SasProtocol.HttpsAndHttp;
+
+            var accountName = _configuration["BlobStorage:AccountName"];
+            var accountKey = _configuration["BlobStorage:AccountKey"];
+
+            var storageCredentials = new StorageSharedKeyCredential(accountName, accountKey);
+            var sasToken = sasBuilder.ToSasQueryParameters(storageCredentials);
+
+            var blobUriBuilder = new BlobUriBuilder(blob.Uri)
+            {
+                Sas = sasToken
+            };
+
+            return new BlobDownloadUriAdapter
+            {
+                Uri = blobUriBuilder.ToUri(),
+                Name = blob.Name,
+                Status = "Available"
+            };
+        }
+
+
         /// <summary>
         /// Retrieves the hierarchical folder structure.
         /// </summary>