4 files changed, 208 insertions, 0 deletions
diff --git a/config/config.go b/config/config.go
new file mode 100644
index 0000000..ffa8de3
--- /dev/null
+++ b/config/config.go
@@ -0,0 +1,45 @@
+/* openbills - Server for web based Libre Billing Software
+ * Copyright (C) 2023-2025  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/>.
+ */
+
+// not to be confused with the conf package.
+// this stores config that can be edited
+// by the user, while the conf package
+// handles the config (TOML, usually) file
+
+package config
+
+import (
+	"gorm.io/gorm"
+	d "vidhukant.com/openbills/db"
+)
+
+var db *gorm.DB
+
+func init() {
+	db = d.DB
+
+	db.AutoMigrate(&Config{})
+}
+
+// config is stored in key-value pairs
+// these may include instance settings,
+// firm information, etc
+type Config struct {
+	ID    uint
+	Key   string
+	Value string
+}
diff --git a/config/controller.go b/config/controller.go
new file mode 100644
index 0000000..4343932
--- /dev/null
+++ b/config/controller.go
@@ -0,0 +1,74 @@
+/* openbills - Server for web based Libre Billing Software
+ * Copyright (C) 2023-2025  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 config
+
+import (
+	"github.com/gin-gonic/gin"
+	"net/http"
+	"strconv"
+	e "vidhukant.com/openbills/errors"
+)
+
+func handleGetConfig(ctx *gin.Context) {
+	var config []Config
+
+	err := getConfig(&config)
+	if err != nil {
+		ctx.Error(err)
+		ctx.Abort()
+		return
+	}
+
+	ctx.JSON(http.StatusOK, gin.H{
+		"data": config,
+	})
+}
+
+func handleSaveConfig(ctx *gin.Context) {
+	var config Config
+	ctx.Bind(&config)
+
+	err := config.upsert()
+	if err != nil {
+		ctx.Error(err)
+		ctx.Abort()
+		return
+	}
+
+	ctx.JSON(http.StatusOK, nil)
+}
+
+func handleDelConfig(ctx *gin.Context) {
+	id, err := strconv.ParseUint(ctx.Param("id"), 10, 64)
+	if err != nil {
+		ctx.Error(e.ErrInvalidID)
+		return
+	}
+
+	var config Config
+	config.ID = uint(id)
+
+	err = config.del()
+	if err != nil {
+		ctx.Error(err)
+		ctx.Abort()
+		return
+	}
+
+	ctx.JSON(http.StatusOK, nil)
+}
diff --git a/config/router.go b/config/router.go
new file mode 100644
index 0000000..8572038
--- /dev/null
+++ b/config/router.go
@@ -0,0 +1,31 @@
+/* openbills - Server for web based Libre Billing Software
+ * Copyright (C) 2023-2025  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 config
+
+import (
+	"github.com/gin-gonic/gin"
+)
+
+func Routes(route *gin.RouterGroup) {
+	i := route.Group("/config")
+	{
+		i.GET("/", handleGetConfig)
+		i.POST("/", handleSaveConfig)
+		i.DELETE("/:id", handleDelConfig)
+	}
+}
diff --git a/config/service.go b/config/service.go
new file mode 100644
index 0000000..51e9a00
--- /dev/null
+++ b/config/service.go
@@ -0,0 +1,58 @@
+/* openbills - Server for web based Libre Billing Software
+ * Copyright (C) 2023-2025  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 config
+
+import (
+	"vidhukant.com/openbills/errors"
+)
+
+func getConfig(config *[]Config) error {
+	res := db.Find(&config)
+
+	// TODO: handle potential errors
+	if res.Error != nil {
+		return res.Error
+	}
+
+	if res.RowsAffected == 0 {
+		return errors.ErrNotFound
+	}
+
+	return nil
+}
+
+func (c *Config) upsert() error {
+	res := db.Save(c)
+	// TODO: handle potential errors
+	return res.Error
+}
+
+func (c *Config) del() error {
+	res := db.Where("id = ?", c.ID).Delete(c)
+
+	// TODO: handle potential errors
+	if res.Error != nil {
+		return res.Error
+	}
+
+	if res.RowsAffected == 0 {
+		return errors.ErrNotFound
+	}
+
+	return nil
+}