feat: initialize nuntius project with full server implementation
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@@ -0,0 +1,292 @@
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//go:build linux || freebsd
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// Package email handles SMTP message composition and delivery.
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package email
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import (
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"bytes"
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"fmt"
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"html/template"
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"net/smtp"
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"time"
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"codeberg.org/petrbalvin/nuntius/internal/config"
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"codeberg.org/petrbalvin/nuntius/pkg/contactform"
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)
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// FormSender delivers contact form submissions for a single form
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// using its own SMTP credentials. Each form has its own FormSender
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// so credentials are isolated per tenant.
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type FormSender struct {
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form *config.Form
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}
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// NewFormSender returns a new FormSender bound to the given form.
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func NewFormSender(form *config.Form) *FormSender {
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return &FormSender{form: form}
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}
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// Send composes and sends a multi-part email (plain text + HTML)
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// for the given request. Returns an error if the SMTP round-trip fails.
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func (s *FormSender) Send(req contactform.Request) error {
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auth := smtp.PlainAuth("", s.form.SMTP.User, s.form.SMTP.Password, s.form.SMTP.Host)
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msg := compose(s.form.From, s.form.To, req, s.form.Name, s.form.Type)
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return smtp.SendMail(s.form.SMTP.AddrFor(), auth, s.form.From, []string{s.form.To}, msg)
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}
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// emailTemplateContact is the HTML body template for contact-type forms.
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var emailTemplateContact = template.Must(template.New("contact").Parse(`<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width,initial-scale=1">
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</head>
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<body style="margin:0;padding:0;background-color:#f3f4f6;font-family:Inter,ui-sans-serif,system-ui,-apple-system,sans-serif">
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<table width="100%" cellpadding="0" cellspacing="0" style="background-color:#f3f4f6;padding:32px 0">
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<tr><td align="center">
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<table width="560" cellpadding="0" cellspacing="0" style="background-color:#ffffff;border-radius:12px;overflow:hidden;box-shadow:0 2px 16px rgba(0,0,0,0.06)">
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<!-- Header -->
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<tr>
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<td style="background-color:#1e40af;padding:24px 28px">
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<p style="margin:0;font-size:13px;font-weight:600;color:#93c5fd;text-transform:uppercase;letter-spacing:0.5px">
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Contact Form Submission
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</p>
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<p style="margin:4px 0 0;font-size:18px;font-weight:700;color:#ffffff">
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{{.FormName}}
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</p>
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</td>
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</tr>
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<!-- Body -->
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<tr>
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<td style="padding:28px 28px 12px">
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<!-- Submitter -->
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<table width="100%" cellpadding="0" cellspacing="0" style="margin-bottom:20px">
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<tr>
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<td style="padding-bottom:8px;border-bottom:1px solid #e5e7eb">
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<span style="font-size:11px;font-weight:600;color:#6b7280;text-transform:uppercase;letter-spacing:0.5px">From</span>
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<br>
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<span style="font-size:15px;font-weight:600;color:#1f2937">{{.Name}}</span>
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<span style="font-size:14px;color:#1e40af;margin-left:8px">{{.Email}}</span>
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</td>
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</tr>
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{{if .Service}}
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<tr>
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<td style="padding:12px 0 8px;border-bottom:1px solid #e5e7eb">
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<span style="font-size:11px;font-weight:600;color:#6b7280;text-transform:uppercase;letter-spacing:0.5px">Service Interest</span>
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<br>
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<span style="font-size:14px;color:#1f2937">{{.Service}}</span>
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</td>
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</tr>
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{{end}}
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<tr>
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<td style="padding:12px 0 8px;border-bottom:1px solid #e5e7eb">
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<span style="font-size:11px;font-weight:600;color:#6b7280;text-transform:uppercase;letter-spacing:0.5px">Received</span>
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<br>
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<span style="font-size:13px;color:#9ca3af">{{.Received}}</span>
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</td>
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</tr>
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</table>
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<!-- Message -->
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<p style="font-size:11px;font-weight:600;color:#6b7280;text-transform:uppercase;letter-spacing:0.5px;margin:0 0 8px">Message</p>
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<div style="font-size:14px;line-height:1.6;color:#1f2937;white-space:pre-wrap;padding:6px 0">{{.Message}}</div>
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</td>
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</tr>
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<!-- Footer -->
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<tr>
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<td style="padding:16px 28px 28px">
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<p style="margin:0;font-size:11px;color:#9ca3af;border-top:1px solid #e5e7eb;padding-top:16px">
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Delivered by <strong style="color:#6b7280">nuntius</strong> — a contact form backend for Linux servers.
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</p>
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</td>
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</tr>
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</table>
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</td></tr>
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</table>
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</body>
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</html>`))
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// emailTemplateFeedback is the HTML body template for feedback-type forms.
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var emailTemplateFeedback = template.Must(template.New("feedback").Parse(`<!DOCTYPE html>
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<html lang="en">
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<head><meta charset="UTF-8"></head>
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<body style="margin:0;padding:0;background:#f3f4f6;font-family:Inter,ui-sans-serif,system-ui,sans-serif">
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<table width="100%" cellpadding="0" cellspacing="0" style="background:#f3f4f6;padding:32px 0">
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<tr><td align="center">
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<table width="560" cellpadding="0" cellspacing="0" style="background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 2px 16px rgba(0,0,0,.06)">
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<tr><td style="background:#0f766e;padding:24px 28px">
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<p style="margin:0;font-size:13px;font-weight:600;color:#5eead4;text-transform:uppercase;letter-spacing:.5px">New Feedback</p>
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<p style="margin:4px 0 0;font-size:18px;font-weight:700;color:#fff">{{.FormName}}</p>
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</td></tr>
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<tr><td style="padding:28px">
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<p style="font-size:11px;font-weight:600;color:#6b7280;text-transform:uppercase;letter-spacing:.5px;margin:0">From</p>
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<p style="font-size:15px;font-weight:600;color:#1f2937;margin:2px 0 16px">{{.Name}} <span style="color:#0f766e">{{.Email}}</span></p>
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<p style="font-size:11px;font-weight:600;color:#6b7280;text-transform:uppercase;letter-spacing:.5px;margin:0 0 8px">Feedback</p>
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<div style="font-size:14px;line-height:1.6;color:#1f2937;white-space:pre-wrap">{{.Message}}</div>
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<p style="font-size:11px;color:#9ca3af;margin:20px 0 0;border-top:1px solid #e5e7eb;padding-top:16px">Delivered by <strong style="color:#6b7280">nuntius</strong></p>
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</td></tr>
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</table>
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</td></tr>
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</table>
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</body>
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</html>`))
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// emailTemplateNewsletter is the HTML body template for newsletter-signup forms.
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var emailTemplateNewsletter = template.Must(template.New("newsletter").Parse(`<!DOCTYPE html>
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<html lang="en">
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<head><meta charset="UTF-8"></head>
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<body style="margin:0;padding:0;background:#f3f4f6;font-family:Inter,ui-sans-serif,system-ui,sans-serif">
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<table width="100%" cellpadding="0" cellspacing="0" style="background:#f3f4f6;padding:32px 0">
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<tr><td align="center">
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<table width="460" cellpadding="0" cellspacing="0" style="background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 2px 16px rgba(0,0,0,.06)">
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<tr><td style="background:#1e40af;padding:20px 24px">
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<p style="margin:0;font-size:18px;font-weight:700;color:#fff">{{.FormName}} — new subscriber</p>
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</td></tr>
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<tr><td style="padding:24px">
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<p style="font-size:11px;font-weight:600;color:#6b7280;text-transform:uppercase;letter-spacing:.5px;margin:0 0 4px">Email</p>
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<p style="font-size:16px;font-weight:600;color:#1e40af;margin:0 0 16px">{{.Email}}</p>
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<p style="font-size:11px;color:#9ca3af;margin:16px 0 0;border-top:1px solid #e5e7eb;padding-top:16px">Delivered by <strong style="color:#6b7280">nuntius</strong></p>
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</td></tr>
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</table>
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</td></tr>
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</table>
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</body>
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</html>`))
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// emailTemplateGeneric is the HTML body template for generic forms.
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var emailTemplateGeneric = template.Must(template.New("generic").Parse(`<!DOCTYPE html>
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<html lang="en">
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<head><meta charset="UTF-8"></head>
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<body style="margin:0;padding:0;background:#f3f4f6;font-family:Inter,ui-sans-serif,system-ui,sans-serif">
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<table width="100%" cellpadding="0" cellspacing="0" style="background:#f3f4f6;padding:32px 0">
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<tr><td align="center">
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<table width="560" cellpadding="0" cellspacing="0" style="background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 2px 16px rgba(0,0,0,.06)">
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<tr><td style="background:#1e40af;padding:24px 28px">
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<p style="margin:0;font-size:13px;font-weight:600;color:#93c5fd;text-transform:uppercase;letter-spacing:.5px">Form Submission</p>
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<p style="margin:4px 0 0;font-size:18px;font-weight:700;color:#fff">{{.FormName}}</p>
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</td></tr>
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<tr><td style="padding:28px">
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<p style="font-size:11px;font-weight:600;color:#6b7280;text-transform:uppercase;letter-spacing:.5px;margin:0">From</p>
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<p style="font-size:15px;font-weight:600;color:#1f2937;margin:2px 0 16px">{{.Name}} <span style="color:#1e40af">{{.Email}}</span></p>
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<p style="font-size:11px;font-weight:600;color:#6b7280;text-transform:uppercase;letter-spacing:.5px;margin:0 0 8px">Message</p>
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<div style="font-size:14px;line-height:1.6;color:#1f2937;white-space:pre-wrap">{{.Message}}</div>
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<p style="font-size:11px;color:#9ca3af;margin:20px 0 0;border-top:1px solid #e5e7eb;padding-top:16px">Delivered by <strong style="color:#6b7280">nuntius</strong></p>
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</td></tr>
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</table>
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</td></tr>
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</table>
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</body>
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</html>`))
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func compose(from, to string, req contactform.Request, formName, formType string) []byte {
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received := time.Now().UTC().Format("January 2, 2006 at 15:04 UTC")
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// --- HTML part ---
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var htmlBuf bytes.Buffer
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tmpl := emailTemplateContact
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switch formType {
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case "newsletter":
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tmpl = emailTemplateNewsletter
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case "feedback":
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tmpl = emailTemplateFeedback
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case "generic":
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tmpl = emailTemplateGeneric
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}
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_ = tmpl.Execute(&htmlBuf, map[string]string{
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"FormName": formName,
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"Name": req.Name,
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"Email": req.Email,
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"Service": req.Service,
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"Message": req.Message,
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"Received": received,
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})
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// --- Subject + plain-text body per form type ---
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var subject, text string
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switch formType {
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case "newsletter":
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subject = fmt.Sprintf("[nuntius/%s] New newsletter subscriber", formName)
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text = fmt.Sprintf(
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"New Newsletter Subscriber: %s\r\n"+
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"---\r\n"+
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"Email: %s\r\n"+
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"Received: %s\r\n"+
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"\r\n"+
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"Delivered by nuntius\r\n",
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formName, req.Email, received,
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)
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case "feedback":
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subject = fmt.Sprintf("[nuntius/%s] New feedback", formName)
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text = fmt.Sprintf(
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"New Feedback: %s\r\n"+
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"---\r\n"+
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"From: %s <%s>\r\n"+
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"Received: %s\r\n"+
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"\r\n"+
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"%s\r\n\r\n"+
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"Delivered by nuntius\r\n",
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formName, req.Name, req.Email, received, req.Message,
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)
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case "generic":
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subject = fmt.Sprintf("[nuntius/%s] New submission", formName)
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text = fmt.Sprintf(
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"New Submission: %s\r\n"+
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"---\r\n"+
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"From: %s <%s>\r\n"+
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"Received: %s\r\n"+
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"\r\n"+
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"%s\r\n\r\n"+
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"Delivered by nuntius\r\n",
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formName, req.Name, req.Email, received, req.Message,
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)
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default: // contact
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subject = fmt.Sprintf("[nuntius/%s] Contact form submission", formName)
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if req.Service != "" {
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subject = fmt.Sprintf("[nuntius/%s][%s] Contact form submission", formName, req.Service)
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}
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text = fmt.Sprintf(
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"Contact Form Submission: %s\r\n"+
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"---\r\n"+
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"From: %s <%s>\r\n"+
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"Service interest: %s\r\n"+
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"Received: %s\r\n"+
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"\r\n"+
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"%s\r\n\r\n"+
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"Delivered by nuntius\r\n",
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formName, req.Name, req.Email, req.Service, received, req.Message,
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)
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}
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// Assemble multipart/alternative message.
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boundary := "nuntius-boundary"
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var msg bytes.Buffer
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msg.WriteString(fmt.Sprintf("From: %s\r\n", from))
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msg.WriteString(fmt.Sprintf("To: %s\r\n", to))
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msg.WriteString(fmt.Sprintf("Subject: %s\r\n", subject))
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msg.WriteString(fmt.Sprintf("Date: %s\r\n", time.Now().UTC().Format(time.RFC1123Z)))
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msg.WriteString(fmt.Sprintf("Reply-To: %s\r\n", req.Email))
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msg.WriteString("MIME-Version: 1.0\r\n")
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msg.WriteString(fmt.Sprintf("Content-Type: multipart/alternative; boundary=%s\r\n", boundary))
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msg.WriteString("\r\n")
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msg.WriteString(fmt.Sprintf("--%s\r\n", boundary))
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msg.WriteString("Content-Type: text/plain; charset=UTF-8\r\n")
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msg.WriteString("\r\n")
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msg.WriteString(text)
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msg.WriteString("\r\n")
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msg.WriteString(fmt.Sprintf("--%s\r\n", boundary))
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msg.WriteString("Content-Type: text/html; charset=UTF-8\r\n")
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msg.WriteString("\r\n")
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msg.WriteString(htmlBuf.String())
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msg.WriteString("\r\n")
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msg.WriteString(fmt.Sprintf("--%s--\r\n", boundary))
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return msg.Bytes()
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}
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