Joseph Doherty
50 lines
2.4 KiB
C#
50 lines
2.4 KiB
C#
using Microsoft.Extensions.DependencyInjection;
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using ScadaLink.NotificationOutbox.Delivery;
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namespace ScadaLink.NotificationOutbox;
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/// <summary>
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/// DI registration for the Notification Outbox component: binds
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/// <see cref="NotificationOutboxOptions"/> and registers the channel delivery adapters.
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/// </summary>
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public static class ServiceCollectionExtensions
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{
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/// <summary>Configuration section bound to <see cref="NotificationOutboxOptions"/>.</summary>
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public const string OptionsSection = "ScadaLink:NotificationOutbox";
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/// <summary>
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/// Registers the Notification Outbox services: the <see cref="NotificationOutboxOptions"/>
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/// binding and the channel delivery adapters.
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///
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/// This extension covers only the outbox-specific registrations. The
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/// <see cref="EmailNotificationDeliveryAdapter"/> reuses the
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/// <see cref="ScadaLink.NotificationService"/> SMTP machinery —
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/// <c>Func<ISmtpClientWrapper></c>, <c>OAuth2TokenService</c> and
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/// <c>NotificationOptions</c> — so the caller (the Host on the central node) must also
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/// call <c>AddNotificationService()</c>. Re-registering those services here would
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/// duplicate them; relying on <c>AddNotificationService</c> keeps a single source of truth.
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///
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/// <see cref="EmailNotificationDeliveryAdapter"/> is registered <em>scoped</em> because it
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/// takes a scoped <see cref="ScadaLink.Commons.Interfaces.Repositories.INotificationRepository"/>
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/// directly. The <see cref="NotificationOutboxActor"/> resolves the adapters from a fresh
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/// scope per dispatch sweep rather than holding them, so no scoped adapter is captured by
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/// the singleton actor.
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/// </summary>
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public static IServiceCollection AddNotificationOutbox(this IServiceCollection services)
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{
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ArgumentNullException.ThrowIfNull(services);
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services.AddOptions<NotificationOutboxOptions>()
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.BindConfiguration(OptionsSection);
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// Scoped: the adapter holds a scoped INotificationRepository. Registered both under
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// the interface (so the dispatch sweep can enumerate every channel adapter) and as
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// the concrete type (so callers and tests can resolve it directly).
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services.AddScoped<EmailNotificationDeliveryAdapter>();
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services.AddScoped<INotificationDeliveryAdapter>(
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sp => sp.GetRequiredService<EmailNotificationDeliveryAdapter>());
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return services;
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}
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}
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