create system register agent id

internal/agent/utils/settings/settings.go

@@ -0,0 +1,68 @@
+package settings
+
+import (
+	"encoding/json"
+	"errors"
+	"io"
+	"os"
+	"path/filepath"
+)
+
+type Settings struct {
+	AgentID string `json:"agent_id"`
+	path    string
+}
+
+func ReadSettings(path string) (*Settings, error) {
+	if path == "" {
+		homeDir, err := os.UserHomeDir()
+		if err != nil {
+			return nil, err
+		}
+		path = filepath.Join(homeDir, ".config", "homeops")
+	}
+
+	err := os.Mkdir(path, 0755)
+	if err != nil {
+		if !errors.Is(err, os.ErrExist) {
+			return nil, err
+		}
+		err = nil
+	}
+
+	file, err := os.Create(path + "/settings.json")
+	if err != nil {
+		if !errors.Is(err, os.ErrExist) {
+			return nil, err
+		}
+		err = nil
+	}
+	defer file.Close()
+
+	var settings Settings
+
+	err = json.NewDecoder(file).Decode(&settings)
+	if err != nil {
+		if !errors.Is(err, io.EOF) {
+			return nil, err
+		}
+	}
+
+	settings.path = path + "/settings.json"
+
+	return &settings, nil
+}
+
+func (s *Settings) Insert(sett Settings) error {
+	file, err := os.OpenFile(s.path, os.O_RDWR, 0755)
+	if err != nil {
+		return err
+	}
+	defer file.Close()
+
+	if err = json.NewEncoder(file).Encode(sett); err != nil {
+		return err
+	}
+
+	return nil
+}