Implement mailto barcodes and corresponding test

formatting/email.go

@@ -0,0 +1,48 @@
+package formatting
+
+import (
+	"encoding/json"
+	"net/url"
+)
+
+type EMail struct {
+	Address string  `json:"address,omitempty"`
+	Cc      *string `json:"cc,omitempty"`
+	Bcc     *string `json:"bcc,omitempty"`
+	Subject *string `json:"subject,omitempty"`
+	Content *string `json:"content,omitempty"`
+}
+
+func formatEMail(input string) (string, error) {
+	var email EMail
+	err := json.Unmarshal([]byte(input), &email)
+	if err != nil {
+		return "", err
+	}
+
+	query := url.Values{}
+
+	if email.Subject != nil {
+		query.Add("subject", *email.Subject)
+	}
+
+	if email.Cc != nil {
+		query.Add("cc", *email.Cc)
+	}
+
+	if email.Bcc != nil {
+		query.Add("bcc", *email.Bcc)
+	}
+
+	if email.Content != nil {
+		query.Add("body", *email.Content)
+	}
+
+	barcodeString := "mailto:" + email.Address
+
+	if len(query) > 0 {
+		barcodeString += "?" + query.Encode()
+	}
+
+	return barcodeString, err
+}