1 files changed, 57 insertions, 0 deletions
diff --git a/invoice/hooks.go b/invoice/hooks.go
new file mode 100644
index 0000000..3d933fb
--- /dev/null
+++ b/invoice/hooks.go
@@ -0,0 +1,57 @@
+/* openbills - Server for web based Libre Billing Software
+ * Copyright (C) 2023  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 invoice
+
+import (
+	"gorm.io/gorm"
+	"vidhukant.com/openbills/errors"
+)
+
+func (i *Invoice) BeforeSave(tx *gorm.DB) error {
+	var err error
+
+	err = i.validate()
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (i *Invoice) BeforeDelete(tx *gorm.DB) error {
+  // if ID is 0, invoice won't be deleted
+	if i.ID == 0 {
+		return errors.ErrNoWhereCondition
+	}
+
+	var err error
+
+	// delete billing address
+	err = db.Where("invoice_id = ?", i.ID).Delete(&InvoiceBillingAddress{}).Error
+	if err != nil {
+		return err
+	}
+
+	// delete shipping address
+	err = db.Where("invoice_id = ?", i.ID).Delete(&InvoiceShippingAddress{}).Error
+	if err != nil {
+		return err
+	}
+
+	return nil
+}