Implemented service delete command

internal/config/config.go

@@ -16,12 +16,15 @@ Scotty. If not, see <https://www.gnu.org/licenses/>.
 package config
 
 import (
+	"errors"
 	"fmt"
 	"os"
 	"path"
 	"path/filepath"
 	"regexp"
+	"strings"
 
+	"github.com/pelletier/go-toml/v2"
 	"github.com/spf13/cobra"
 	"github.com/spf13/viper"
 	"go.uploadedlobster.com/scotty/internal/version"
@@ -30,6 +33,7 @@ import (
 const (
 	defaultDatabase  = "scotty.sqlite3"
 	defaultOAuthHost = "127.0.0.1:2369"
+	fileMode         = 0640
 )
 
 func DefaultConfigDir() string {
@@ -48,7 +52,7 @@ func InitConfig(cfgFile string) error {
 		viper.AddConfigPath(configDir)
 		viper.SetConfigType("toml")
 		viper.SetConfigName(version.AppName)
-		viper.SetConfigPermissions(0640)
+		viper.SetConfigPermissions(fileMode)
 	}
 
 	setDefaults()
@@ -67,6 +71,43 @@ func InitConfig(cfgFile string) error {
 	return viper.ReadInConfig()
 }
 
+// Write the configuration except for removedKeys
+func WriteConfig(removedKeys ...string) error {
+	file := viper.ConfigFileUsed()
+	if len(file) == 0 {
+		return errors.New("no configuration file defined, cannot write config")
+	}
+
+	configMap := viper.AllSettings()
+	for _, key := range removedKeys {
+		c := configMap
+		ok := true
+		subKeys := strings.Split(key, ".")
+		keyLen := len(subKeys)
+		// Deep search the key in the config and delete the deepest key, if it exists
+		for i, s := range subKeys {
+			if i == keyLen-1 {
+				// This is the final key, delete it from the map
+				delete(c, s)
+			} else {
+				// Use the child for next iteration if it is a map
+				c, ok = c[s].(map[string]any)
+				if !ok {
+					// Child is not a map, can't search deeper
+					break
+				}
+			}
+		}
+	}
+
+	content, err := toml.Marshal(configMap)
+	if err != nil {
+		return err
+	}
+
+	return os.WriteFile(file, content, fileMode)
+}
+
 func DatabasePath() string {
 	path := viper.GetString("database")
 	if filepath.IsAbs(path) {