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package main
// functions to import and export the protobuf
// data to and from config files
import (
"errors"
"fmt"
"os"
"path/filepath"
"go.wit.com/log"
"google.golang.org/protobuf/proto"
)
func (m *Portmaps) ConfigSave() error {
if m == nil {
return fmt.Errorf("ConfigSave() nil")
}
s := m.FormatTEXT()
log.Info("proto.Marshal() worked len", len(s))
configWrite([]byte(s))
return nil
}
func (m *Portmaps) ConfigLoad() error {
if m == nil {
return errors.New("It's not safe to run ConfigLoad() on a nil ?")
}
if os.Getenv("CLOUD_HOME") == "" {
homeDir, _ := os.UserHomeDir()
fullpath := filepath.Join(homeDir, ".config/cloud")
os.Setenv("CLOUD_HOME", fullpath)
}
var data []byte
var err error
if data, err = loadFile("gus.text"); err != nil {
// something went wrong loading the file
return err
}
if data != nil {
if err = proto.Unmarshal(data, m); err != nil {
log.Warn("broken gus.text config file", "gus.text")
return err
}
return nil
}
log.Log(INFO, "gus.ConfigLoad() has", m.Len(), "port mappings")
return nil
}
func loadFile(filename string) ([]byte, error) {
homeDir, err := os.UserHomeDir()
p := filepath.Join(homeDir, ".config/cloud")
fullname := filepath.Join(p, filename)
data, err := os.ReadFile(fullname)
if errors.Is(err, os.ErrNotExist) {
// if file does not exist, just return nil. this
return nil, nil
}
if err != nil {
// log.Info("open config file :", err)
return nil, err
}
return data, nil
}
func (m *Portmaps) loadFile(fname string) ([]byte, error) {
fullname := filepath.Join(os.Getenv("CLOUD_HOME"), fname)
data, err := os.ReadFile(fullname)
if err != nil {
// log.Info("open config file :", err)
return nil, err
}
return data, nil
}
func configWrite(data []byte) error {
homeDir, err := os.UserHomeDir()
p := filepath.Join(homeDir, ".config/cloud")
fname := filepath.Join(p, "gus.text")
cfgfile, err := os.OpenFile(fname, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0644)
defer cfgfile.Close()
if err != nil {
log.Warn("open config file :", err)
return err
}
cfgfile.Write(data)
return nil
}
func (m *Portmaps) configWrite(fname string, data []byte) error {
fullname := filepath.Join(os.Getenv("CLOUD_HOME"), fname)
cfgfile, err := os.OpenFile(fullname, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0644)
defer cfgfile.Close()
if err != nil {
log.Warn("open config file :", err)
return err
}
cfgfile.Write(data)
return nil
}
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