Add project files.

Core.Blueprint.Mongo/Configuration/RegisterBlueprint.cs

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+using Core.Blueprint.Mongo;
+using Core.Blueprint.Mongo.Configuration;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Options;
+using MongoDB.Driver;
+
+namespace Core.Blueprint.DAL.Mongo.Configuration
+{
+    /// <summary>
+    /// The <see cref="RegisterBlueprint"/> class contains extension methods for registering the MongoDB context and configuration settings 
+    /// to the <see cref="IServiceCollection"/> in the dependency injection container.
+    /// </summary>
+    public static class RegisterBlueprint
+    {
+        /// <summary>
+        /// Adds the MongoDB layer services to the <see cref="IServiceCollection"/>.
+        /// Registers the MongoDB context and configuration settings for MongoDB connection, database name, and audience.
+        /// </summary>
+        /// <param name="services">The <see cref="IServiceCollection"/> to which the services will be added.</param>
+        /// <param name="configuration">The <see cref="IConfiguration"/> used to load MongoDB settings.</param>
+        /// <returns>The updated <see cref="IServiceCollection"/> with MongoDB services registered.</returns>
+        public static IServiceCollection AddMongoLayer(this IServiceCollection services, IConfiguration configuration)
+        {
+            var environment = Environment.GetEnvironmentVariable("ASPNETCORE_ENVIRONMENT") ?? string.Empty;
+
+            services.AddSingleton<IMongoContext, MongoContext>();
+
+            var ConnectionString = configuration.GetSection("ConnectionStrings:MongoDB").Value ?? string.Empty;
+            var Databasename = configuration.GetSection("MongoDb:DatabaseName").Value ?? string.Empty;
+            var Audience = (environment == "Local")
+                ? configuration.GetSection("MongoDb:LocalAudience").Value
+                : configuration.GetSection("MongoDb:Audience").Value;
+
+            if (string.IsNullOrEmpty(ConnectionString) || string.IsNullOrEmpty(Databasename) || string.IsNullOrEmpty(Audience))
+                throw new InvalidOperationException("Mongo connection is not configured correctly.");
+
+            services.Configure<MongoDbSettings>(options =>
+            {
+                options.ConnectionString = ConnectionString;
+                options.Databasename = Databasename;
+                options.Audience = Audience;
+            });
+
+            services.AddSingleton<IMongoClient>(serviceProvider =>
+            {
+                var settings = serviceProvider.GetRequiredService<IOptions<MongoDbSettings>>().Value;
+                var mongoClientSettings = MongoClientSettings.FromConnectionString(settings.ConnectionString);
+                mongoClientSettings.Credential = MongoCredential.CreateOidcCredential(new HeathIdentityProvider(settings.Audience));
+                return new MongoClient(mongoClientSettings);
+            });
+
+            services.AddSingleton<IMongoDatabase>(serviceProvider =>
+            {
+                var settings = serviceProvider.GetRequiredService<IOptions<MongoDbSettings>>().Value;
+                var client = serviceProvider.GetRequiredService<IMongoClient>();
+                return client.GetDatabase(settings.Databasename);
+            });
+
+            services.AddSingleton<IMongoDbSettings>(serviceProvider => serviceProvider.GetRequiredService<IOptions<MongoDbSettings>>().Value);
+
+            return services;
+        }
+    }
+}