add vendoring

vendor/gitlab.com/etke.cc/linkpearl/auth.go

@@ -0,0 +1,74 @@
+package linkpearl
+
+import (
+	"errors"
+
+	"maunium.net/go/mautrix"
+	"maunium.net/go/mautrix/id"
+)
+
+func (l *Linkpearl) login(username string, password string) error {
+	if err := l.restoreSession(); err == nil {
+		l.log.Debug("session restored successfully")
+		return nil
+	}
+
+	l.log.Debug("auth using login and password...")
+	_, err := l.api.Login(&mautrix.ReqLogin{
+		Type: "m.login.password",
+		Identifier: mautrix.UserIdentifier{
+			Type: mautrix.IdentifierTypeUser,
+			User: username,
+		},
+		Password:         password,
+		StoreCredentials: true,
+	})
+	if err != nil {
+		l.log.Error("cannot authorize using login and password: %v", err)
+		return err
+	}
+	l.store.SaveSession(l.api.UserID, l.api.DeviceID, l.api.AccessToken)
+
+	return nil
+}
+
+// restoreSession tries to load previous active session token from db (if any)
+func (l *Linkpearl) restoreSession() error {
+	l.log.Debug("restoring previous session...")
+
+	userID, deviceID, token := l.store.LoadSession()
+	if userID == "" || deviceID == "" || token == "" {
+		return errors.New("cannot restore session from db")
+	}
+	if !l.validateSession(userID, deviceID, token) {
+		return errors.New("restored session is invalid")
+	}
+
+	l.api.AccessToken = token
+	l.api.UserID = userID
+	l.api.DeviceID = deviceID
+	return nil
+}
+
+func (l *Linkpearl) validateSession(userID id.UserID, deviceID id.DeviceID, token string) bool {
+	valid := true
+	// preserve current values
+	currentToken := l.api.AccessToken
+	currentUserID := l.api.UserID
+	currentDeviceID := l.api.DeviceID
+	// set new values
+	l.api.AccessToken = token
+	l.api.UserID = userID
+	l.api.DeviceID = deviceID
+
+	if _, err := l.api.GetOwnPresence(); err != nil {
+		l.log.Debug("previous session token was not found or invalid: %v", err)
+		valid = false
+	}
+
+	// restore original values
+	l.api.AccessToken = currentToken
+	l.api.UserID = currentUserID
+	l.api.DeviceID = currentDeviceID
+	return valid
+}