Device management

config.go

@@ -3,7 +3,10 @@ package main
 import (
 	// Standard
 	"encoding/json"
+	"fmt"
 	"os"
+	"slices"
+	"strings"
 )
 
 type Config struct {
@@ -20,6 +23,8 @@ type Config struct {
 	}
 
 	Devices []Device
+
+	filename string
 }
 
 type Device struct {
@@ -39,5 +44,64 @@ func readConfig() (config Config, err error) {
 	}
 
 	err = json.Unmarshal(configData, &config)
+	config.filename = flagConfig
+	return
+}
+
+func (cfg *Config) UpdateDevice(currentName string, deviceToUpdate Device) (dev Device, err error) {
+
+	i := slices.IndexFunc(cfg.Devices, func(d Device) bool {
+		return strings.TrimSpace(strings.ToLower(d.Name)) == strings.TrimSpace(strings.ToLower(currentName))
+	})
+
+	if i > -1 {
+		dev = cfg.Devices[i]
+	}
+
+	if strings.TrimSpace(deviceToUpdate.Name) == "" {
+		err = fmt.Errorf("Name can't be empty")
+		return
+	}
+	if strings.TrimSpace(deviceToUpdate.Address) == "" {
+		err = fmt.Errorf("Address can't be empty")
+		return
+	}
+	if strings.TrimSpace(deviceToUpdate.Username) == "" {
+		err = fmt.Errorf("Username can't be empty")
+		return
+	}
+	if deviceToUpdate.Port < 1 || deviceToUpdate.Port > 65535 {
+		err = fmt.Errorf("Invalid port")
+		return
+	}
+
+	dev.Name = strings.TrimSpace(strings.ToLower(deviceToUpdate.Name))
+	dev.Address = strings.TrimSpace(strings.ToLower(deviceToUpdate.Address))
+	dev.Port = deviceToUpdate.Port
+	dev.Username = strings.TrimSpace(deviceToUpdate.Username)
+
+	// TODO - Should be configurable...
+	if dev.Timeout == 0 {
+		dev.Timeout = 10
+	}
+
+	// Device not found - create it!
+	if i == -1 {
+		if strings.TrimSpace(deviceToUpdate.Password) == "" {
+			err = fmt.Errorf("Password can't be empty")
+			return
+		}
+		dev.Password = strings.TrimSpace(deviceToUpdate.Password)
+		cfg.Devices = append(cfg.Devices, dev)
+	} else {
+		if deviceToUpdate.Password != "" {
+			dev.Password = strings.TrimSpace(deviceToUpdate.Password)
+		}
+		cfg.Devices[i] = dev
+	}
+
+	j, _ := json.Marshal(cfg)
+	err = os.WriteFile(cfg.filename, j, 0600)
+
 	return
 }