2 files changed, 80 insertions, 0 deletions
diff --git a/util/address.go b/util/address.go
new file mode 100644
index 0000000..45c80c9
--- /dev/null
+++ b/util/address.go
@@ -0,0 +1,26 @@
+/* openbills - Server for web based Libre Billing Software
+ * Copyright (C) 2023-2024  Vidhu Kant Sharma <vidhukant@vidhukant.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package util
+
+type Address struct {
+	AddressText string
+	City        string
+	State       string
+	PostalCode  string
+	Country     string
+}
diff --git a/util/validators.go b/util/validators.go
new file mode 100644
index 0000000..c180daf
--- /dev/null
+++ b/util/validators.go
@@ -0,0 +1,54 @@
+/* openbills - Server for web based Libre Billing Software
+ * Copyright (C) 2023-2024  Vidhu Kant Sharma <vidhukant@vidhukant.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package util
+
+import (
+	"regexp"
+	"net/mail"
+	"net/url"
+)
+
+var phoneRegex, gstinRegex *regexp.Regexp
+func init() {
+	phoneRegex = regexp.MustCompile(`^(?:(?:\(?(?:00|\+)([1-4]\d\d|[1-9]\d?)\)?)?[\-\.\ \\\/]?)?((?:\(?\d{1,}\)?[\-\.\ \\\/]?){0,})(?:[\-\.\ \\\/]?(?:#|ext\.?|extension|x)[\-\.\ \\\/]?(\d+))?$`)
+	gstinRegex = regexp.MustCompile(`^[0-9]{2}[A-Z]{5}[0-9]{4}[A-Z]{1}[1-9A-Z]{1}Z[0-9A-Z]{1}$`)
+}
+
+func ValidateEmail(email string) bool {
+	_, err := mail.ParseAddress(email)
+	if err != nil {
+		return false
+	}
+  return true
+}
+
+func ValidateWebsite(website string) bool {
+	_, err := url.ParseRequestURI(website)
+	if err != nil {
+		return false
+	}
+  return true
+}
+
+func ValidateGstin(gstin string) bool {
+	return gstinRegex.MatchString(gstin)
+}
+
+func ValidatePhone(phone string) bool {
+  return phoneRegex.MatchString(phone)
+}