Server Side form validation 4: check email

internal/forms/forms.go

@@ -5,6 +5,8 @@ import (
 	"net/http"
 	"net/url"
 	"strings"
+
+	"github.com/asaskevich/govalidator"
 )
 
 // Form creates a custom form struct, embeds a url.Values object
@@ -51,3 +53,11 @@ func (f *Form) MinLength(field string, length int, r *http.Request) bool {
     }
     return true
 }
+
+// IsEmail checks the email address
+func (f *Form) IsEmail(field string, r *http.Request) {
+    value := r.Form.Get(field)
+    if !govalidator.IsEmail(value) {
+        f.Errors.Add(field, "Invalid email address")
+    }
+}