AddResendEmail

Binds the Email section to EmailSettings, then registers the shared template loader, IResendMailService, and the Resend client itself, authenticated with the configured token and placed behind a typed HttpClient with the standard resilience handler. Call it once during startup, then send classes that inherit from BaseMailTemplate through the injected service. The mail service is transient and the template loader a singleton, so its file cache is shared across sends, while settings are read through IOptions<EmailSettings> and a configuration reload requires a restart.

Usage

using AlmightyShogun.Mail.Resend;

builder.Services.AddResendEmail(builder.Configuration);

Template files

The package ships no templates. It reads BaseEmailTemplate.html, BaseEmailParagraph.html, and BaseEmailButton.html from a mail folder under AppContext.BaseDirectory, so an application supplies the three itself and copies them to the output folder on publish.

A missing folder or template throws an InvalidOperationException naming what to add. That check runs while registering rather than while the host starts, so a test that only builds a service collection hits it too.

Parameters

configuration: IConfiguration
Configuration carrying the Email section. An absent section binds successfully and fails validation instead, which is what reports the missing token rather than a binding error.

Returns

The IServiceCollection instance with the Resend client, template loader, and mail service registered.

Type signature

public IServiceCollection AddResendEmail(
    IConfiguration configuration
);