Reorganize packages pt 1

End goal: simplify build process

smtpd/utils.go

@@ -0,0 +1,36 @@
+package smtpd
+
+import (
+	"crypto/sha1"
+	"fmt"
+	"html"
+	"io"
+	"strings"
+)
+
+// Take "user+ext@host.com" and return "user", aka the mailbox we'll store it in
+func ParseMailboxName(emailAddress string) (result string) {
+	result = strings.ToLower(emailAddress)
+	if idx := strings.Index(result, "@"); idx > -1 {
+		result = result[0:idx]
+	}
+	if idx := strings.Index(result, "+"); idx > -1 {
+		result = result[0:idx]
+	}
+	return result
+}
+
+// Take a mailbox name and hash it into the directory we'll store it in
+func HashMailboxName(mailbox string) string {
+	h := sha1.New()
+	io.WriteString(h, mailbox)
+	return fmt.Sprintf("%x", h.Sum(nil))
+}
+
+// TextToHtml takes plain text, escapes it and tries to pretty it up for
+// HTML display
+func TextToHtml(text string) string {
+	text = html.EscapeString(text)
+	replacer := strings.NewReplacer("\r\n", "<br/>\n", "\r", "<br/>\n", "\n", "<br/>\n")
+	return replacer.Replace(text)
+}