From cee8b75badb6dac260441e538d9b240d292ca80e Mon Sep 17 00:00:00 2001
From: vilmibm <nathanielksmith@gmail.com>
Date: Tue, 7 Mar 2023 01:06:46 +0000
Subject: [PATCH] WIP on sending external email

---
 cmd/review/email.go |  8 ++++++
 cmd/review/main.go  | 11 +++++--
 cmd/welcome/main.go |  1 +
 email/email.go      | 70 +++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 87 insertions(+), 3 deletions(-)
 create mode 100644 cmd/review/email.go

diff --git a/cmd/review/email.go b/cmd/review/email.go
new file mode 100644
index 0000000..70412e9
--- /dev/null
+++ b/cmd/review/email.go
@@ -0,0 +1,8 @@
+package main
+
+// TODO function for reading smtp.pw from /town/docs
+
+func sendInviteEmail() error {
+	// TODO
+	return nil
+}
diff --git a/cmd/review/main.go b/cmd/review/main.go
index 14fe877..5025719 100644
--- a/cmd/review/main.go
+++ b/cmd/review/main.go
@@ -263,13 +263,18 @@ func _main() error {
 		updateCount()
 		render()
 		if decision == models.SignupAccepted {
-			err = invites.InsertInvite(inviteDB, currSignup.CleanEmail)
-			if err != nil {
+			if err = invites.InsertInvite(inviteDB, currSignup.CleanEmail); err != nil {
 				errorModal.SetText(fmt.Sprintf("error! failed to create invite: %s", err.Error()))
 				pages.SwitchToPage("error")
 			}
 
-			// TODO send invite email
+			// TODO need to get an invite back from InsertInvite so we can send it to
+			// the clean email using sendInviteEmail
+
+			if err = sendInviteEmail(); err != nil {
+				errorModal.SetText(fmt.Sprintf("error! failed to send welcome email: %s", err.Error()))
+				pages.SwitchToPage("error")
+			}
 		}
 		pages.SwitchToPage("main")
 	})
diff --git a/cmd/welcome/main.go b/cmd/welcome/main.go
index 285f1a3..8af7bec 100644
--- a/cmd/welcome/main.go
+++ b/cmd/welcome/main.go
@@ -16,6 +16,7 @@ import (
 	_ "embed"
 )
 
+// TODO mark on user table what signup id led to the account for forensics
 // TODO add logging like the signup tool has
 // TODO consider merging adduser, usermod, and createkeyfile into single createuser helper to limit sudoers list
 // TODO move magic key machine to static page
diff --git a/email/email.go b/email/email.go
index 0e22961..1a96684 100644
--- a/email/email.go
+++ b/email/email.go
@@ -2,10 +2,18 @@ package email
 
 import (
 	"bytes"
+	"crypto/tls"
 	"fmt"
+	"net/smtp"
 	"os/exec"
 )
 
+const (
+	SMTPlogin = "root@tilde.town"
+	SMTPHost  = "smtp.zoho.com"
+	SMTPPort  = 465
+)
+
 func SendLocalEmail(username, subject, body string) error {
 	cmd := exec.Command("/usr/sbin/sendmail", username)
 	cmd.Stdin = bytes.NewBufferString(fmt.Sprintf("Subject: %s\n\n%s", subject, body))
@@ -16,3 +24,65 @@ func SendLocalEmail(username, subject, body string) error {
 
 	return nil
 }
+
+type ExternalMailer struct {
+	Password string
+}
+
+func NewExternalMailer(pw string) *ExternalMailer {
+	if pw == "" {
+		panic("why?")
+	}
+	return &ExternalMailer{
+		Password: pw,
+	}
+}
+
+func (m *ExternalMailer) Send(address, subject, body string) error {
+	// TODO need to add headers to prepare message
+	auth := smtp.PlainAuth("", SMTPlogin, m.Password, SMTPHost)
+
+	server := fmt.Sprintf("%s:%d", SMTPHost, SMTPPort)
+
+	tlsconf := &tls.Config{
+		InsecureSkipVerify: true,
+		ServerName:         server,
+	}
+
+	conn, err := tls.Dial("tcp", server, tlsconf)
+	if err != nil {
+		return err
+	}
+
+	c, err := smtp.NewClient(conn, SMTPHost)
+	if err != nil {
+		return err
+	}
+
+	if err = c.Auth(auth); err != nil {
+		return fmt.Errorf("auth failed for smtp: %w", err)
+	}
+
+	if err = c.Mail("root@tilde.town"); err != nil {
+		return err
+	}
+
+	if err = c.Rcpt(address); err != nil {
+		return err
+	}
+
+	w, err := c.Data()
+	if err != nil {
+		return err
+	}
+
+	_, err = w.Write([]byte(body))
+	if err != nil {
+		return err
+	}
+
+	w.Close()
+	c.Quit()
+
+	return nil
+}