load and save config file

apiGo/config/Config.go

@@ -0,0 +1,98 @@
+package config
+
+import (
+	"errors"
+	"fmt"
+	"github.com/pelletier/go-toml/v2"
+	"os"
+)
+
+type DatabaseT struct {
+	DBName     string
+	DBPassword string
+	DBUser     string
+	DBPort     uint16
+	DBHost     string
+}
+
+type FileConfT struct {
+	Database DatabaseT
+}
+
+func defaultConig() *FileConfT {
+	return &FileConfT{Database: DatabaseT{
+		DBName:     "mediacenter",
+		DBPassword: "mediapassword",
+		DBUser:     "mediacenteruser",
+		DBPort:     3306,
+		DBHost:     "127.0.0.1",
+	}}
+}
+
+var liveConf FileConfT
+
+func Init() {
+	cfgname := "openmediacenter.cfg"
+	cfgpath := "/etc/"
+
+	// load config from disk
+	dat, err := os.ReadFile(cfgpath + cfgname)
+	if err != nil {
+		// handle error if not exists or no sufficient read access
+		if _, ok := err.(*os.PathError); ok {
+
+			// check if config exists on local dir
+			dat, err = os.ReadFile(cfgname)
+			if err != nil {
+				// config really doesn't exist!
+				fmt.Printf("config not existing -- generating new empty config at %s%s\n", cfgpath, cfgname)
+
+				// generate new default config
+				obj, _ := toml.Marshal(defaultConig())
+				liveConf = *defaultConig()
+
+				err := os.WriteFile(cfgpath+cfgname, obj, 777)
+				if err != nil {
+					if errors.Is(err, os.ErrPermission) {
+						// permisson denied to create file try to create at current dir
+						err = os.WriteFile(cfgname, obj, 777)
+						if err != nil {
+							fmt.Println("failed to create default config file!")
+						} else {
+							fmt.Println("config file created at .")
+						}
+					} else {
+						fmt.Println(err.Error())
+					}
+				}
+			} else {
+				// ok decode local config
+				decodeConfig(&dat)
+			}
+
+		} else {
+			// other error
+			fmt.Println(err.Error())
+		}
+	} else {
+		decodeConfig(&dat)
+	}
+}
+
+func decodeConfig(bin *[]byte) {
+	config := FileConfT{}
+
+	err := toml.Unmarshal(*bin, &config)
+	if err != nil {
+		fmt.Println(err)
+
+	} else {
+		fmt.Println("Successfully loaded config file!")
+
+		liveConf = config
+	}
+}
+
+func GetConfig() *FileConfT {
+	return &liveConf
+}