Rene Nochebuena
bfec1761d0
Introduces code.nochebuena.dev/einherjar/smtp — the email delivery starter for the Einherjar framework. New module with no micro-lib counterpart. Pure stdlib — no external dependencies beyond contracts and core. Interfaces (CT-6: one TypeSpec per file): - Sender — Send(ctx context.Context, msg Message) error - Component — lifecycle.Component + observability.Checkable + Sender - Message — To, CC, BCC, ReplyTo, Subject, Body, ContentType, Attachments - Attachment — Name, ContentType string; Data io.Reader (consumed once on Send) - Template — wraps html/template for email rendering Implementation: - New(logger, cfg) Component — returns noopClient when cfg.Host is empty; SMTP absence must never block a transaction (e.g. account creation) - noopClient: all lifecycle and Send methods return nil; Send logs Warn; Priority LevelDegraded; Name "smtp" - smtpClient: OnInit/OnStart/OnStop are no-ops (stateless stdlib client); HealthCheck: TCP dial to Host:Port; Priority LevelDegraded - Send: buildRawMessage → netsmtp.SendMail; BCC passed in SMTP envelope (RCPT TO) but never written to message headers (RFC 5321/5322 compliance) - buildRawMessage: plain message without attachments; multipart/mixed with quoted-printable body + base64 attachments when Attachments non-empty; multipart.NewWriter created first to obtain boundary before headers are written - ParseFS(fsys, patterns...) (*Template, error) — wraps html/template.ParseFS - Template.Render(name, data) (string, error) — executes named template - net/smtp aliased as netsmtp to avoid package-name collision in package smtp Config (EINHERJAR_SMTP_* env vars): Host, Port(587), User, Password, From - Component interface embeds observability.Identifiable; identifiable.go implements ModulePath and ModuleVersion on both smtpClient and noopClient via runtime/debug.ReadBuildInfo() — prints in launcher banner
16 lines
452 B
Go
16 lines
452 B
Go
package smtp
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// Message is a fully-specified email ready for delivery.
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// Body must be pre-rendered before passing to [Sender.Send] —
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// use [Template.Render] to produce it from an HTML template.
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type Message struct {
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To []string
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CC []string
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BCC []string
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ReplyTo string
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Subject string
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Body string
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ContentType string // "text/plain" or "text/html"; defaults to "text/plain"
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Attachments []Attachment
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}
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