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package persistence
import (
"github.com/pkg/errors"
"io/ioutil"
"dev.narayana.im/narayana/telegabber/yamldb"
log "github.com/sirupsen/logrus"
"gopkg.in/yaml.v2"
)
// SessionsYamlDB wraps YamlDB with Session
type SessionsYamlDB struct {
yamldb.YamlDB
Data *SessionsMap
}
// SessionsMap is for :sessions: subtree
type SessionsMap struct {
Sessions map[string]Session `yaml:":sessions"`
}
// Session is a key-values subtree
type Session struct {
Login string `yaml:":login"`
}
var sessionDB *SessionsYamlDB
// SessionMarshaller implementation for YamlDB
func SessionMarshaller() ([]byte, error) {
return yaml.Marshal(sessionDB.Data)
}
// LoadSessions restores TDlib sessions from the previous run
func LoadSessions(path string) (*SessionsYamlDB, error) {
var sessionData SessionsMap
var err error
sessionDB, err = initYamlDB(path, &sessionData)
if err != nil {
return sessionDB, errors.Wrap(err, "Sessions restore error")
}
return sessionDB, nil
}
func emptySessionsMap(dataPtr *SessionsMap) {
dataPtr.Sessions = make(map[string]Session)
}
func initYamlDB(path string, dataPtr *SessionsMap) (*SessionsYamlDB, error) {
file, err := ioutil.ReadFile(path)
if err == nil {
err = yaml.Unmarshal(file, dataPtr)
if err != nil {
return nil, errors.Wrap(err, "YamlDB is corrupted")
}
if dataPtr.Sessions == nil {
emptySessionsMap(dataPtr)
}
log.Debugf("Unmarshalled YAML: %#v", *dataPtr)
} else {
// DB file does not exist, create an empty DB
emptySessionsMap(dataPtr)
}
return &SessionsYamlDB{
YamlDB: yamldb.YamlDB{
Path: path,
PathNew: path + ".new",
},
Data: dataPtr,
}, nil
}
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