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-rw-r--r--.gitignore2
-rw-r--r--LICENSE674
-rw-r--r--conf/conf.go44
-rw-r--r--customer/controller.go102
-rw-r--r--customer/customer.go66
-rw-r--r--customer/hooks.go48
-rw-r--r--customer/router.go32
-rw-r--r--customer/service.go73
-rw-r--r--customer/validators.go107
-rw-r--r--db/db.go48
-rw-r--r--errors/errors.go51
-rw-r--r--errors/middleware.go60
-rw-r--r--errors/status.go64
-rw-r--r--go.mod50
-rw-r--r--go.sum556
-rw-r--r--info.go42
-rw-r--r--item/controller.go156
-rw-r--r--item/hooks.go57
-rw-r--r--item/item.go52
-rw-r--r--item/router.go40
-rw-r--r--item/service.go126
-rw-r--r--item/validators.go111
-rw-r--r--main.go55
-rw-r--r--openbills.toml13
24 files changed, 2629 insertions, 0 deletions
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..bbd55b1
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+/openbills
+.env
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..f288702
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,674 @@
+ GNU GENERAL PUBLIC LICENSE
+ Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+ Preamble
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+ The licenses for most software and other practical works are designed
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+share and change all versions of a program--to make sure it remains free
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+GNU General Public License for most of our software; it applies also to
+any other work released this way by its authors. You can apply it to
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+ 15. Disclaimer of Warranty.
+
+ THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+ 16. Limitation of Liability.
+
+ IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+ 17. Interpretation of Sections 15 and 16.
+
+ If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+ END OF TERMS AND CONDITIONS
+
+ How to Apply These Terms to Your New Programs
+
+ If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+ To do so, attach the following notices to the program. It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+ <one line to give the program's name and a brief idea of what it does.>
+ Copyright (C) <year> <name of author>
+
+ 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/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+ If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+ <program> Copyright (C) <year> <name of author>
+ This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+ This is free software, and you are welcome to redistribute it
+ under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License. Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+ You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+ The GNU General Public License does not permit incorporating your program
+into proprietary programs. If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library. If this is what you want to do, use the GNU Lesser General
+Public License instead of this License. But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.
diff --git a/conf/conf.go b/conf/conf.go
new file mode 100644
index 0000000..58dafe1
--- /dev/null
+++ b/conf/conf.go
@@ -0,0 +1,44 @@
+/* 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 conf
+
+import (
+ "github.com/spf13/viper"
+ "log"
+)
+
+func init() {
+ viper.SetConfigName("openbills")
+ viper.SetConfigType("toml")
+ viper.AddConfigPath("/etc/openbills")
+ viper.AddConfigPath(".")
+
+ if err := viper.ReadInConfig(); err != nil {
+ if _, ok := err.(viper.ConfigFileNotFoundError); ok {
+ log.Printf("\x1b[43m\x1b[30m[warn]\x1b[0m config file not found, skipping...\n")
+ } else {
+ log.Fatalf("\x1b[41m\x1b[30m[err]\x1b[0m cannot read config file. %v\n", err.Error())
+ }
+ }
+
+ viper.SetDefault("port", "8765")
+
+ viper.SetDefault("instance.title", "OpenBills")
+ viper.SetDefault("instance.description", "Libre Billing Software")
+ viper.SetDefault("instance.url", "https://openbills.vidhukant.com")
+}
diff --git a/customer/controller.go b/customer/controller.go
new file mode 100644
index 0000000..9381c45
--- /dev/null
+++ b/customer/controller.go
@@ -0,0 +1,102 @@
+/* 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 customer
+
+import (
+ e "vidhukant.com/openbills/errors"
+ "github.com/gin-gonic/gin"
+ "net/http"
+ "strconv"
+)
+
+func handleGetSingleCustomer (ctx *gin.Context) {
+ id, err := strconv.ParseUint(ctx.Param("id"), 10, 64)
+ if err != nil {
+ ctx.Error(e.ErrInvalidID)
+ return
+ }
+
+ var customer Customer
+
+ err = getCustomer(&customer, uint(id))
+ if err != nil {
+ ctx.Error(err)
+ ctx.Abort()
+ return
+ }
+
+ ctx.JSON(http.StatusOK, gin.H{
+ "message": "success",
+ "data": customer,
+ })
+}
+
+func handleGetCustomers (ctx *gin.Context) {
+ var customers []Customer
+
+ err := getCustomers(&customers)
+ if err != nil {
+ ctx.Error(err)
+ ctx.Abort()
+ return
+ }
+
+ ctx.JSON(http.StatusOK, gin.H{
+ "message": "success",
+ "data": customers,
+ })
+}
+
+func handleSaveCustomer (ctx *gin.Context) {
+ var customer Customer
+ ctx.Bind(&customer)
+
+ err := customer.upsert()
+ if err != nil {
+ ctx.Error(err)
+ ctx.Abort()
+ return
+ }
+
+ ctx.JSON(http.StatusOK, gin.H{
+ "message": "success",
+ "data": customer,
+ })
+}
+
+func handleDelCustomer (ctx *gin.Context) {
+ id, err := strconv.ParseUint(ctx.Param("id"), 10, 64)
+ if err != nil {
+ ctx.Error(e.ErrInvalidID)
+ return
+ }
+
+ var customer Customer
+ customer.ID = uint(id)
+
+ err = customer.del()
+ if err != nil {
+ ctx.Error(err)
+ ctx.Abort()
+ return
+ }
+
+ ctx.JSON(http.StatusOK, gin.H{
+ "message": "success",
+ })
+}
diff --git a/customer/customer.go b/customer/customer.go
new file mode 100644
index 0000000..5f25e2d
--- /dev/null
+++ b/customer/customer.go
@@ -0,0 +1,66 @@
+/* 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 customer
+
+import (
+ "gorm.io/gorm"
+ d "vidhukant.com/openbills/db"
+)
+
+var db *gorm.DB
+func init() {
+ db = d.DB
+
+ db.AutoMigrate(&Customer{}, &CustomerContact{}, &CustomerBillingAddress{}, &CustomerShippingAddress{})
+}
+
+type CustomerContact struct {
+ gorm.Model
+ CustomerID uint
+ Name string
+ Phone string
+ Email string
+ Website string
+}
+
+type Address struct {
+ AddressText string
+ City string
+ State string
+ PostalCode string
+ Country string
+}
+
+type CustomerBillingAddress struct {
+ Address
+ CustomerID uint
+}
+
+type CustomerShippingAddress struct {
+ Address
+ CustomerID uint
+}
+
+type Customer struct {
+ gorm.Model
+ Name string
+ Gstin string
+ Contact CustomerContact
+ BillingAddress CustomerBillingAddress
+ ShippingAddresses []CustomerShippingAddress
+}
diff --git a/customer/hooks.go b/customer/hooks.go
new file mode 100644
index 0000000..020e1c5
--- /dev/null
+++ b/customer/hooks.go
@@ -0,0 +1,48 @@
+/* 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 customer
+
+import (
+ "gorm.io/gorm"
+ "vidhukant.com/openbills/errors"
+)
+
+func (c *Customer) BeforeSave(tx *gorm.DB) error {
+ var err error
+
+ err = c.validate()
+ if err != nil {
+ return err
+ }
+
+ err = c.Contact.validate()
+ if err != nil {
+ return err
+ }
+
+ return nil
+}
+
+func (c *Customer) BeforeDelete(tx *gorm.DB) error {
+ // if ID is 0, customer won't be deleted
+ if c.ID == 0 {
+ return errors.ErrNoWhereCondition
+ }
+
+ return nil
+}
diff --git a/customer/router.go b/customer/router.go
new file mode 100644
index 0000000..9db92d3
--- /dev/null
+++ b/customer/router.go
@@ -0,0 +1,32 @@
+/* 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 customer
+
+import (
+ "github.com/gin-gonic/gin"
+)
+
+func Routes(route *gin.RouterGroup) {
+ g := route.Group("/customer")
+ {
+ g.GET("/", handleGetCustomers)
+ g.GET("/:id", handleGetSingleCustomer)
+ g.POST("/", handleSaveCustomer)
+ g.DELETE("/:id", handleDelCustomer)
+ }
+}
diff --git a/customer/service.go b/customer/service.go
new file mode 100644
index 0000000..c5d7cb8
--- /dev/null
+++ b/customer/service.go
@@ -0,0 +1,73 @@
+/* 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 customer
+
+import (
+ e "vidhukant.com/openbills/errors"
+)
+
+func getCustomer(customer *Customer, id uint) error {
+ res := db.Preload("Contact").Preload("BillingAddress").Preload("ShippingAddresses").Find(&customer, id)
+
+ // TODO: handle potential errors
+ if res.Error != nil {
+ return res.Error
+ }
+
+ if res.RowsAffected == 0 {
+ return e.ErrNotFound
+ }
+
+ return nil
+}
+
+func getCustomers(customers *[]Customer) error {
+ res := db.Find(&customers)
+
+ // TODO: handle potential errors
+ if res.Error != nil {
+ return res.Error
+ }
+
+ if res.RowsAffected == 0 {
+ return e.ErrEmptyResponse
+ }
+
+ return nil
+}
+
+func (c *Customer) upsert() error {
+ res := db.Save(c)
+ // TODO: handle potential errors
+ return res.Error
+}
+
+func (c *Customer) del() error {
+ res := db.Delete(c)
+
+ // TODO: handle potential errors
+ if res.Error != nil {
+ return res.Error
+ }
+
+ if res.RowsAffected == 0 {
+ return e.ErrNotFound
+ }
+
+ return nil
+}
diff --git a/customer/validators.go b/customer/validators.go
new file mode 100644
index 0000000..6c51ad9
--- /dev/null
+++ b/customer/validators.go
@@ -0,0 +1,107 @@
+/* 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 customer
+
+import (
+ "regexp"
+ "strings"
+ "vidhukant.com/openbills/errors"
+ e "errors"
+)
+
+// NOTE: very inefficient and really really really dumb but it works
+// TODO: find a better (or even a remotely good) way
+func validateContactField(field, value string) error {
+ if value != "" {
+ var count int64
+ err := db.Model(&CustomerContact{}).
+ Where(field + " = ?", value).
+ Count(&count).
+ Error
+
+ if err != nil {
+ return err
+ }
+
+ if count > 0 {
+ switch(field) {
+ case "phone":
+ return errors.ErrNonUniquePhone
+ case "email":
+ return errors.ErrNonUniqueEmail
+ case "website":
+ return errors.ErrNonUniqueWebsite
+ default:
+ return e.New(field + " is not unique")
+ }
+ }
+ }
+
+ return nil
+}
+
+func (c *CustomerContact) validate() error {
+ // trim whitespaces
+ c.Name = strings.TrimSpace(c.Name)
+ c.Phone = strings.TrimSpace(c.Phone)
+ c.Email = strings.TrimSpace(c.Email)
+ c.Website = strings.TrimSpace(c.Website)
+
+ var err error
+ for _, i := range [][]string{{"phone", c.Phone}, {"email", c.Email}, {"website", c.Website}} {
+ err = validateContactField(i[0], i[1])
+ if err != nil {
+ return err
+ }
+ }
+
+ return nil
+}
+
+func (c *Customer) validate() error {
+ // trim whitespaces
+ c.Name = strings.TrimSpace(c.Name)
+ c.Gstin = strings.TrimSpace(c.Gstin)
+
+ // don't validate if GSTIN is empty
+ if c.Gstin != "" {
+ // GSTIN regex validation
+ match, _ := regexp.MatchString("^[0-9]{2}[A-Z]{5}[0-9]{4}[A-Z]{1}[1-9A-Z]{1}Z[0-9A-Z]{1}$", c.Gstin)
+ if (!match) {
+ return errors.ErrInvalidGSTIN
+ }
+
+ // make sure GSTIN is unique
+ var count int64
+ err := db.Model(&Customer{}).
+ Select("gstin").
+ Where("gstin = ?", c.Gstin).
+ Count(&count).
+ Error
+
+ if err != nil {
+ return err
+ }
+
+ if count > 0 {
+ return errors.ErrNonUniqueGSTIN
+ }
+ }
+
+ return nil
+}
diff --git a/db/db.go b/db/db.go
new file mode 100644
index 0000000..14b0f11
--- /dev/null
+++ b/db/db.go
@@ -0,0 +1,48 @@
+/* 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 db
+
+import (
+ "gorm.io/gorm"
+ "gorm.io/driver/mysql"
+ "github.com/spf13/viper"
+ "log"
+ "fmt"
+)
+
+var DB *gorm.DB
+
+func init() {
+ conf := viper.Get("database").(map[string]interface{})
+
+ x := fmt.Sprintf(
+ "%v:%v@%v/%v?%v",
+ conf["username"],
+ conf["password"],
+ conf["location"],
+ conf["db_name"],
+ conf["params"],
+ )
+
+ var err error
+ DB, err = gorm.Open(mysql.Open(x), &gorm.Config{})
+
+ if err != nil {
+ log.Fatalf("\x1b[41m\x1b[30m[err]\x1b[0m cannot to connect to database, exiting.\n%v\n", err)
+ }
+}
diff --git a/errors/errors.go b/errors/errors.go
new file mode 100644
index 0000000..08d8a4c
--- /dev/null
+++ b/errors/errors.go
@@ -0,0 +1,51 @@
+/* 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 errors
+
+import (
+ "errors"
+)
+
+var (
+ // 204
+ ErrEmptyResponse = errors.New("No Records Found")
+
+ // 400
+ ErrNoWhereCondition = errors.New("No Where Condition")
+ ErrInvalidID = errors.New("Invalid ID")
+ ErrEmptyContactName = errors.New("Contact Name Cannot Be Empty")
+ ErrInvalidGSTIN = errors.New("Invalid GSTIN")
+ ErrEmptyBrandName = errors.New("Brand Name Cannot Be Empty")
+ ErrInvalidUnitPrice = errors.New("Invalid Unit Price")
+ ErrInvalidGSTPercentage = errors.New("Invalid GST Percentage")
+
+ // 404
+ ErrNotFound = errors.New("Not Found")
+ ErrBrandNotFound = errors.New("This Brand Does Not Exist")
+
+ // 409
+ ErrNonUniqueGSTIN = errors.New("GSTIN Must Be Unique")
+ ErrNonUniquePhone = errors.New("Phone Number Must Be Unique")
+ ErrNonUniqueEmail = errors.New("Email Address Must Be Unique")
+ ErrNonUniqueWebsite = errors.New("Website Must Be Unique")
+ ErrNonUniqueBrandName = errors.New("Brand Name Must Be Unique")
+ ErrNonUniqueBrandItem = errors.New("Item With Same Name And Brand Already Exists")
+
+ // 500
+ ErrInternalServerError = errors.New("Internal Server Error")
+)
diff --git a/errors/middleware.go b/errors/middleware.go
new file mode 100644
index 0000000..6d2f344
--- /dev/null
+++ b/errors/middleware.go
@@ -0,0 +1,60 @@
+/* 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 errors
+
+import (
+ "github.com/gin-gonic/gin"
+ "log"
+)
+
+func writeLog(method, path string, statusCode int, err error) {
+ var prefix string
+ if (statusCode >= 400 && statusCode < 500) || (statusCode >= 200 && statusCode < 300) {
+ prefix = "\x1b[43m\x1b[30m[warn]\x1b[0m"
+ } else {
+ prefix = "\x1b[41m\x1b[30m[err]\x1b[0m"
+ }
+
+ log.Printf("%s \x1b[47m\x1b[30m%s %s\x1b[0m %d %s", prefix, method, path, statusCode, err.Error())
+}
+
+func ErrResponse() gin.HandlerFunc {
+ return func(ctx *gin.Context) {
+ ctx.Next()
+
+ if len(ctx.Errors) > 0 {
+ err := ctx.Errors[0].Err
+
+ status := ctx.Writer.Status()
+ if status == 200 {
+ status = StatusCodeFromErr(err)
+ }
+
+ ctx.JSON(status, gin.H{
+ "error": err.Error(),
+ })
+
+ writeLog(
+ ctx.Request.Method,
+ ctx.FullPath(),
+ status,
+ err,
+ )
+ }
+ }
+}
diff --git a/errors/status.go b/errors/status.go
new file mode 100644
index 0000000..eb59506
--- /dev/null
+++ b/errors/status.go
@@ -0,0 +1,64 @@
+/* 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 errors
+
+import (
+ "errors"
+ "net/http"
+)
+
+func StatusCodeFromErr(err error) int {
+ // 204
+ if errors.Is(err, ErrEmptyResponse) {
+ return http.StatusNoContent
+ }
+
+ // 400
+ if errors.Is(err, ErrNoWhereCondition) ||
+ errors.Is (err, ErrInvalidID) ||
+ errors.Is (err, ErrEmptyContactName) ||
+ errors.Is(err, ErrInvalidGSTIN) ||
+ errors.Is(err, ErrEmptyBrandName) ||
+ errors.Is(err, ErrInvalidUnitPrice) ||
+ errors.Is(err, ErrInvalidGSTPercentage) {
+ return http.StatusBadRequest
+ }
+
+ // 404
+ if errors.Is(err, ErrNotFound) ||
+ errors.Is(err, ErrBrandNotFound) {
+ return http.StatusNotFound
+ }
+
+ // 409
+ if errors.Is(err, ErrNonUniqueGSTIN) ||
+ errors.Is(err, ErrNonUniquePhone) ||
+ errors.Is(err, ErrNonUniqueEmail) ||
+ errors.Is(err, ErrNonUniqueWebsite) ||
+ errors.Is(err, ErrNonUniqueBrandName) ||
+ errors.Is(err, ErrNonUniqueBrandItem) {
+ return http.StatusConflict
+ }
+
+ // 500
+ if errors.Is(err, ErrInternalServerError) {
+ return http.StatusInternalServerError
+ }
+
+ return http.StatusInternalServerError
+}
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..bc5c009
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,50 @@
+module vidhukant.com/openbills
+
+go 1.21.0
+
+require (
+ github.com/gin-gonic/gin v1.9.1
+ github.com/spf13/viper v1.16.0
+ gorm.io/driver/mysql v1.5.1
+ gorm.io/gorm v1.25.4
+)
+
+require (
+ github.com/bytedance/sonic v1.9.1 // indirect
+ github.com/chenzhuoyu/base64x v0.0.0-20221115062448-fe3a3abad311 // indirect
+ github.com/fsnotify/fsnotify v1.6.0 // indirect
+ github.com/gabriel-vasile/mimetype v1.4.2 // indirect
+ github.com/gin-contrib/sse v0.1.0 // indirect
+ github.com/go-playground/locales v0.14.1 // indirect
+ github.com/go-playground/universal-translator v0.18.1 // indirect
+ github.com/go-playground/validator/v10 v10.14.0 // indirect
+ github.com/go-sql-driver/mysql v1.7.0 // indirect
+ github.com/goccy/go-json v0.10.2 // indirect
+ github.com/hashicorp/hcl v1.0.0 // indirect
+ github.com/jinzhu/inflection v1.0.0 // indirect
+ github.com/jinzhu/now v1.1.5 // indirect
+ github.com/json-iterator/go v1.1.12 // indirect
+ github.com/klauspost/cpuid/v2 v2.2.4 // indirect
+ github.com/leodido/go-urn v1.2.4 // indirect
+ github.com/magiconair/properties v1.8.7 // indirect
+ github.com/mattn/go-isatty v0.0.19 // indirect
+ github.com/mitchellh/mapstructure v1.5.0 // indirect
+ github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
+ github.com/modern-go/reflect2 v1.0.2 // indirect
+ github.com/pelletier/go-toml/v2 v2.0.8 // indirect
+ github.com/spf13/afero v1.9.5 // indirect
+ github.com/spf13/cast v1.5.1 // indirect
+ github.com/spf13/jwalterweatherman v1.1.0 // indirect
+ github.com/spf13/pflag v1.0.5 // indirect
+ github.com/subosito/gotenv v1.4.2 // indirect
+ github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
+ github.com/ugorji/go/codec v1.2.11 // indirect
+ golang.org/x/arch v0.3.0 // indirect
+ golang.org/x/crypto v0.9.0 // indirect
+ golang.org/x/net v0.10.0 // indirect
+ golang.org/x/sys v0.8.0 // indirect
+ golang.org/x/text v0.9.0 // indirect
+ google.golang.org/protobuf v1.30.0 // indirect
+ gopkg.in/ini.v1 v1.67.0 // indirect
+ gopkg.in/yaml.v3 v3.0.1 // indirect
+)
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..9f2d670
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,556 @@
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diff --git a/info.go b/info.go
new file mode 100644
index 0000000..2f161a9
--- /dev/null
+++ b/info.go
@@ -0,0 +1,42 @@
+/* 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 main
+
+import (
+ "github.com/gin-gonic/gin"
+ "github.com/spf13/viper"
+ "net/http"
+)
+
+type Info struct {
+ Version string
+ Title string
+ Description string
+ URL string
+}
+
+func serverInfo(ctx *gin.Context) {
+ info := Info {
+ Version: OPENBILLS_VERSION,
+ Title: viper.GetString("instance.title"),
+ Description: viper.GetString("instance.description"),
+ URL: viper.GetString("instance.url"),
+ }
+
+ ctx.JSON(http.StatusOK, info)
+}
diff --git a/item/controller.go b/item/controller.go
new file mode 100644
index 0000000..b4e27c1
--- /dev/null
+++ b/item/controller.go
@@ -0,0 +1,156 @@
+/* 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 item
+
+import (
+ e "vidhukant.com/openbills/errors"
+ "github.com/gin-gonic/gin"
+ "net/http"
+ "strconv"
+)
+
+func handleGetBrandItems (ctx *gin.Context) {
+ id, err := strconv.ParseUint(ctx.Param("id"), 10, 64)
+ if err != nil {
+ ctx.Error(e.ErrInvalidID)
+ return
+ }
+
+ var items []SavedItem
+ err = getBrandItems(&items, uint(id))
+ if err != nil {
+ ctx.Error(err)
+ ctx.Abort()
+ return
+ }
+
+ ctx.JSON(http.StatusOK, gin.H{
+ "message": "success",
+ "data": items,
+ })
+}
+
+func handleGetBrands (ctx *gin.Context) {
+ var brands []Brand
+
+ err := getBrands(&brands)
+ if err != nil {
+ ctx.Error(err)
+ ctx.Abort()
+ return
+ }
+
+ ctx.JSON(http.StatusOK, gin.H{
+ "message": "success",
+ "data": brands,
+ })
+}
+
+func handleSaveBrand (ctx *gin.Context) {
+ var brand Brand
+ ctx.Bind(&brand)
+
+ err := brand.upsert()
+ if err != nil {
+ ctx.Error(err)
+ ctx.Abort()
+ return
+ }
+
+ ctx.JSON(http.StatusOK, gin.H{
+ "message": "success",
+ "data": brand,
+ })
+}
+
+func handleDelBrand (ctx *gin.Context) {
+ id, err := strconv.ParseUint(ctx.Param("id"), 10, 64)
+ if err != nil {
+ ctx.Error(e.ErrInvalidID)
+ return
+ }
+
+ var brand Brand
+ brand.ID = uint(id)
+
+ err = brand.del()
+ if err != nil {
+ ctx.Error(err)
+ ctx.Abort()
+ return
+ }
+
+ ctx.JSON(http.StatusOK, gin.H{
+ "message": "success",
+ })
+}
+
+func handleGetItems (ctx *gin.Context) {
+ var items []SavedItem
+
+ err := getItems(&items)
+ if err != nil {
+ ctx.Error(err)
+ ctx.Abort()
+ return
+ }
+
+ ctx.JSON(http.StatusOK, gin.H{
+ "message": "success",
+ "data": items,
+ })
+}
+
+func handleSaveItem (ctx *gin.Context) {
+ var item SavedItem
+ ctx.Bind(&item)
+
+ err := item.upsert()
+ if err != nil {
+ ctx.Error(err)
+ ctx.Abort()
+ return
+ }
+
+ ctx.JSON(http.StatusOK, gin.H{
+ "message": "success",
+ "data": item,
+ })
+}
+
+func handleDelItem (ctx *gin.Context) {
+ id, err := strconv.ParseUint(ctx.Param("id"), 10, 64)
+ if err != nil {
+ ctx.Error(e.ErrInvalidID)
+ return
+ }
+
+ var item SavedItem
+ item.ID = uint(id)
+
+ err = item.del()
+ if err != nil {
+ ctx.Error(err)
+ ctx.Abort()
+ return
+ }
+
+ ctx.JSON(http.StatusOK, gin.H{
+ "message": "success",
+ })
+}
diff --git a/item/hooks.go b/item/hooks.go
new file mode 100644
index 0000000..ddb9a44
--- /dev/null
+++ b/item/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 item
+
+import (
+ "gorm.io/gorm"
+ "vidhukant.com/openbills/errors"
+)
+
+func (i *SavedItem) BeforeSave(tx *gorm.DB) error {
+ var err error
+
+ err = checkIfBrandExists(i.BrandID)
+ if err != nil {
+ return err
+ }
+
+ err = i.validate()
+ if err != nil {
+ return err
+ }
+
+ return nil
+}
+
+func (b *Brand) BeforeSave(tx *gorm.DB) error {
+ err := b.validate()
+ if err != nil {
+ return err
+ }
+
+ return nil
+}
+
+func (b *Brand) BeforeDelete(tx *gorm.DB) error {
+ // if ID is 0, brand won't be deleted
+ if b.ID == 0 {
+ return errors.ErrNoWhereCondition
+ }
+
+ return nil
+}
diff --git a/item/item.go b/item/item.go
new file mode 100644
index 0000000..4da9c78
--- /dev/null
+++ b/item/item.go
@@ -0,0 +1,52 @@
+/* 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 item
+
+import (
+ "gorm.io/gorm"
+ d "vidhukant.com/openbills/db"
+)
+
+var db *gorm.DB
+func init() {
+ db = d.DB
+
+ db.AutoMigrate(&SavedItem{}, &Brand{})
+}
+
+type Brand struct {
+ gorm.Model
+ Name string
+}
+
+type Item struct {
+ BrandID uint
+ Brand Brand
+ UnitOfMeasure string // TODO: probably has to be a custom type
+ HasDecimalQuantity bool
+ Name string
+ Description string
+ HSN string
+ UnitPrice string // float
+ GSTPercentage string // float
+}
+
+type SavedItem struct {
+ gorm.Model
+ Item
+}
diff --git a/item/router.go b/item/router.go
new file mode 100644
index 0000000..fab973f
--- /dev/null
+++ b/item/router.go
@@ -0,0 +1,40 @@
+/* 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 item
+
+import (
+ "github.com/gin-gonic/gin"
+)
+
+func Routes(route *gin.RouterGroup) {
+ b := route.Group("/brand")
+ {
+ b.GET("/", handleGetBrands)
+ b.GET("/:id/items", handleGetBrandItems)
+ b.POST("/", handleSaveBrand)
+ b.DELETE("/:id", handleDelBrand)
+ }
+
+ i := route.Group("/item")
+ {
+ i.GET("/", handleGetItems)
+ //i.GET("/:id", handleGetBrandItems)
+ i.POST("/", handleSaveItem)
+ i.DELETE("/:id", handleDelItem)
+ }
+}
diff --git a/item/service.go b/item/service.go
new file mode 100644
index 0000000..c8a72f6
--- /dev/null
+++ b/item/service.go
@@ -0,0 +1,126 @@
+/* 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 item
+
+import (
+ "vidhukant.com/openbills/errors"
+ e "vidhukant.com/openbills/errors"
+)
+
+func getBrandItems(items *[]SavedItem, id uint) error {
+ // check if id is valid
+ var count int64
+ err := db.Model(&Brand{}).
+ Select("id").
+ Where("id = ?", id).
+ Count(&count).
+ Error
+
+ if err != nil {
+ return err
+ }
+
+ if count == 0 {
+ return errors.ErrBrandNotFound
+ }
+
+ res := db.Model(&SavedItem{}).Where("brand_id = ?", id).Find(&items)
+
+ // TODO: handle potential errors
+ if res.Error != nil {
+ return res.Error
+ }
+
+ if res.RowsAffected == 0 {
+ return e.ErrEmptyResponse
+ }
+
+ return nil
+}
+
+func getBrands(brands *[]Brand) error {
+ res := db.Find(&brands)
+
+ // TODO: handle potential errors
+ if res.Error != nil {
+ return res.Error
+ }
+
+ if res.RowsAffected == 0 {
+ return e.ErrEmptyResponse
+ }
+
+ return nil
+}
+
+func (b *Brand) upsert() error {
+ res := db.Save(b)
+ // TODO: handle potential errors
+ return res.Error
+}
+
+func (b *Brand) del() error {
+ res := db.Delete(b)
+
+ // TODO: handle potential errors
+ if res.Error != nil {
+ return res.Error
+ }
+
+ if res.RowsAffected == 0 {
+ return e.ErrNotFound
+ }
+
+ return nil
+}
+
+func getItems(items *[]SavedItem) error {
+ res := db.Preload("Brand").Find(&items)
+
+ // TODO: handle potential errors
+ if res.Error != nil {
+ return res.Error
+ }
+
+ if res.RowsAffected == 0 {
+ return e.ErrEmptyResponse
+ }
+
+ return nil
+}
+
+func (i *SavedItem) upsert() error {
+ res := db.Save(i)
+ // TODO: handle potential errors
+ return res.Error
+}
+
+func (i *SavedItem) del() error {
+ res := db.Delete(i)
+
+ // TODO: handle potential errors
+ if res.Error != nil {
+ return res.Error
+ }
+
+ if res.RowsAffected == 0 {
+ return e.ErrNotFound
+ }
+
+ return nil
+}
diff --git a/item/validators.go b/item/validators.go
new file mode 100644
index 0000000..09162ab
--- /dev/null
+++ b/item/validators.go
@@ -0,0 +1,111 @@
+/* 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 item
+
+import (
+ "strconv"
+ "strings"
+
+ "vidhukant.com/openbills/errors"
+)
+
+func (b *Brand) validate() error {
+ // trim whitespaces
+ b.Name = strings.TrimSpace(b.Name)
+
+ if b.Name == "" {
+ return errors.ErrEmptyBrandName
+ }
+
+ // make sure GSTIN is unique
+ var count int64
+ err := db.Model(&Brand{}).
+ Select("name").
+ Where("name = ?", b.Name).
+ Count(&count).
+ Error
+
+ if err != nil {
+ return err
+ }
+
+ if count > 0 {
+ return errors.ErrNonUniqueBrandName
+ }
+
+ return nil
+}
+
+func checkIfBrandExists(id uint) error {
+ // check if brand id is valid
+ var count int64
+ err := db.Model(&Brand{}).
+ Select("id").
+ Where("id = ?", id).
+ Count(&count).
+ Error
+
+ if err != nil {
+ return err
+ }
+
+ if count == 0 {
+ return errors.ErrBrandNotFound
+ }
+
+ return nil
+}
+
+func (i *SavedItem) validate() error {
+ // trim whitespaces
+ i.Name = strings.TrimSpace(i.Name)
+ i.Description = strings.TrimSpace(i.Description)
+ i.HSN = strings.TrimSpace(i.HSN)
+
+ var err error
+
+ // check if UnitPrice is float
+ _, err = strconv.ParseFloat(i.UnitPrice, 64)
+ if err != nil && strings.TrimSpace(i.UnitPrice) != "" {
+ return errors.ErrInvalidUnitPrice
+ }
+
+ // check if GSTPercentage is float
+ _, err = strconv.ParseFloat(i.GSTPercentage, 64)
+ if err != nil && strings.TrimSpace(i.GSTPercentage) != "" {
+ return errors.ErrInvalidGSTPercentage
+ }
+
+ // check if item with same name and brand already exists
+ var count int64
+ err = db.Model(&SavedItem{}).
+ Select("name, brand_id").
+ Where("brand_id = ? and name = ?", i.BrandID, i.Name).
+ Count(&count).
+ Error
+
+ if err != nil {
+ return err
+ }
+
+ if count != 0 {
+ return errors.ErrNonUniqueBrandItem
+ }
+
+ return nil
+}
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..e40ac8f
--- /dev/null
+++ b/main.go
@@ -0,0 +1,55 @@
+/* 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 main
+
+import (
+ // used internally
+ _ "vidhukant.com/openbills/conf"
+ _ "vidhukant.com/openbills/db"
+
+ // middlewares, etc
+ "vidhukant.com/openbills/errors"
+
+ // routes
+ "vidhukant.com/openbills/customer"
+ "vidhukant.com/openbills/item"
+
+ "github.com/gin-gonic/gin"
+ "github.com/spf13/viper"
+
+ "log"
+)
+
+const OPENBILLS_VERSION = "v0.0.1"
+
+func main() {
+ log.Printf("\x1b[46m\x1b[30m[info]\x1b[0m Starting OpenBills Server %s\n", OPENBILLS_VERSION)
+
+ r := gin.New()
+
+ r.GET("/info", serverInfo)
+
+ api := r.Group("/api")
+ api.Use(errors.ErrResponse())
+ {
+ customer.Routes(api)
+ item.Routes(api)
+ }
+
+ r.Run(":" + viper.GetString("port"))
+}
diff --git a/openbills.toml b/openbills.toml
new file mode 100644
index 0000000..567aa00
--- /dev/null
+++ b/openbills.toml
@@ -0,0 +1,13 @@
+port = 8765
+
+[database]
+username = "openbills"
+password = "VeryStrongPass123"
+location = "tcp(127.0.0.1:3306)"
+db_name = "openbills"
+params = "charset=utf8mb4&parseTime=True&loc=Local"
+
+[instance]
+title = "OpenBills"
+description = "Libre Billing Software"
+url = "https://openbills.vidhukant.com/"