Session management refactoring

model/session.go

@@ -0,0 +1,56 @@
+// Copyright 2017 Frédéric Guillot. All rights reserved.
+// Use of this source code is governed by the Apache 2.0
+// license that can be found in the LICENSE file.
+
+package model
+
+import (
+	"database/sql/driver"
+	"encoding/json"
+	"errors"
+	"fmt"
+)
+
+// SessionData represents the data attached to the session.
+type SessionData struct {
+	CSRF              string `json:"csrf"`
+	OAuth2State       string `json:"oauth2_state"`
+	FlashMessage      string `json:"flash_message"`
+	FlashErrorMessage string `json:"flash_error_message"`
+}
+
+func (s SessionData) String() string {
+	return fmt.Sprintf(`CSRF="%s", "OAuth2State="%s", FlashMessage="%s", "FlashErrorMessage="%s"`,
+		s.CSRF, s.OAuth2State, s.FlashMessage, s.FlashErrorMessage)
+}
+
+// Value converts the session data to JSON.
+func (s SessionData) Value() (driver.Value, error) {
+	j, err := json.Marshal(s)
+	return j, err
+}
+
+// Scan converts raw JSON data.
+func (s *SessionData) Scan(src interface{}) error {
+	source, ok := src.([]byte)
+	if !ok {
+		return errors.New("session: unable to assert type of src")
+	}
+
+	err := json.Unmarshal(source, s)
+	if err != nil {
+		return fmt.Errorf("session: %v", err)
+	}
+
+	return err
+}
+
+// Session represents a session in the system.
+type Session struct {
+	ID   string
+	Data *SessionData
+}
+
+func (s *Session) String() string {
+	return fmt.Sprintf(`ID="%s", Data="%v"`, s.ID, s.Data)
+}

model/token.go

@@ -1,17 +0,0 @@
-// Copyright 2017 Frédéric Guillot. All rights reserved.
-// Use of this source code is governed by the Apache 2.0
-// license that can be found in the LICENSE file.
-
-package model
-
-import "fmt"
-
-// Token represents a CSRF token in the system.
-type Token struct {
-	ID    string
-	Value string
-}
-
-func (t Token) String() string {
-	return fmt.Sprintf(`ID="%s"`, t.ID)
-}