[feature] Email notifications for new / closed moderation reports (#1628)

* start fiddling about with email sending to allow multiple recipients

* do some fiddling

* notifs working

* notify on closed report

* finishing up

* envparsing

* use strings.ContainsAny

internal/email/test.go

@@ -17,15 +17,8 @@
 
 package email
 
-import (
-	"bytes"
-	"net/smtp"
-
-	"github.com/superseriousbusiness/gotosocial/internal/gtserror"
-)
-
 const (
-	testTemplate = "email_test_text.tmpl"
+	testTemplate = "email_test.tmpl"
 	testSubject  = "GoToSocial Test Email"
 )
 
@@ -39,20 +32,5 @@ type TestData struct {
 }
 
 func (s *sender) SendTestEmail(toAddress string, data TestData) error {
-	buf := &bytes.Buffer{}
-	if err := s.template.ExecuteTemplate(buf, testTemplate, data); err != nil {
-		return err
-	}
-	testBody := buf.String()
-
-	msg, err := assembleMessage(testSubject, testBody, toAddress, s.from)
-	if err != nil {
-		return err
-	}
-
-	if err := smtp.SendMail(s.hostAddress, s.auth, s.from, []string{toAddress}, msg); err != nil {
-		return gtserror.SetType(err, gtserror.TypeSMTP)
-	}
-
-	return nil
+	return s.sendTemplate(testTemplate, testSubject, data, toAddress)
 }