Session management refactoring

storage/session.go

@@ -0,0 +1,77 @@
+// 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 storage
+
+import (
+	"database/sql"
+	"fmt"
+
+	"github.com/miniflux/miniflux/helper"
+	"github.com/miniflux/miniflux/model"
+)
+
+// CreateSession creates a new session.
+func (s *Storage) CreateSession() (*model.Session, error) {
+	session := model.Session{
+		ID:   helper.GenerateRandomString(32),
+		Data: &model.SessionData{CSRF: helper.GenerateRandomString(64)},
+	}
+
+	query := "INSERT INTO sessions (id, data) VALUES ($1, $2)"
+	_, err := s.db.Exec(query, session.ID, session.Data)
+	if err != nil {
+		return nil, fmt.Errorf("unable to create session: %v", err)
+	}
+
+	return &session, nil
+}
+
+// UpdateSessionField updates only one session field.
+func (s *Storage) UpdateSessionField(sessionID, field string, value interface{}) error {
+	query := `UPDATE sessions
+		SET data = jsonb_set(data, '{%s}', to_jsonb($1::text), true)
+		WHERE id=$2`
+
+	_, err := s.db.Exec(fmt.Sprintf(query, field), value, sessionID)
+	if err != nil {
+		return fmt.Errorf("unable to update session field: %v", err)
+	}
+
+	return nil
+}
+
+// Session returns the given session.
+func (s *Storage) Session(id string) (*model.Session, error) {
+	var session model.Session
+
+	query := "SELECT id, data FROM sessions WHERE id=$1"
+	err := s.db.QueryRow(query, id).Scan(
+		&session.ID,
+		&session.Data,
+	)
+
+	if err == sql.ErrNoRows {
+		return nil, fmt.Errorf("session not found: %s", id)
+	} else if err != nil {
+		return nil, fmt.Errorf("unable to fetch session: %v", err)
+	}
+
+	return &session, nil
+}
+
+// FlushAllSessions removes all sessions from the database.
+func (s *Storage) FlushAllSessions() (err error) {
+	_, err = s.db.Exec(`DELETE FROM user_sessions`)
+	if err != nil {
+		return err
+	}
+
+	_, err = s.db.Exec(`DELETE FROM sessions`)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}