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package db
import (
"database/sql"
"crypto/rand"
"encoding/base64"
"errors"
"time"
)
func (p *Phlox) CreateSession(user User) (Session, error) {
bytes := make([]byte, 32)
_, err := rand.Read(bytes)
if err != nil {
return Session{}, err
}
sessionid := base64.StdEncoding.EncodeToString(bytes)
userid := user.Id
now := time.Now().UTC()
nowStr := now.Format(time.RFC3339)
_, err = p.db.Exec(
"insert into sessions (sessionid, userid, created, modified) values (?, ?, ?, ?);",
sessionid,
userid,
nowStr, nowStr,
)
if err != nil {
return Session{}, err
}
return Session{
Id: sessionid,
UserId: userid,
Created: now,
Modified: now,
}, nil
}
func (p *Phlox) DeleteSession(session Session) error {
_, err := p.db.Exec("delete from sessions where sessionid = ?;", session.Id)
return err
}
func extractSession(s Scanner) (Session, error) {
var (
session Session
createdStr string
modifiedStr string
)
// scan
err := s.Scan(&session.Id, &session.UserId, &createdStr, &modifiedStr)
if err != nil {
return Session{}, err
}
// parse times
session.Created, err = time.Parse(time.RFC3339, createdStr)
if err != nil {
return Session{}, err
}
session.Modified, err = time.Parse(time.RFC3339, modifiedStr)
if err != nil {
return Session{}, err
}
return session, nil
}
func (p *Phlox) CheckSession(session Session) (bool, error) {
row := p.db.QueryRow("select * from sessions where sessionid = ?", session.Id)
session, err := extractSession(row)
if err != nil {
if errors.Is(err, sql.ErrNoRows) {
// no row returned, so invalid session
return false, nil
} else {
// some other error
return false, err
}
}
return true, nil
}
func (p *Phlox) CheckSessionId(id string) (bool, error) {
session := Session{ Id: id }
return p.CheckSession(session)
}
func (p *Phlox) TouchSession(session Session) error {
now := time.Now().UTC().Format(time.RFC3339)
_, err := p.db.Exec(
"update sessions set modified = ? where sessionid = ?;",
now, session.Id,
)
return err
}
func (p *Phlox) CleanSessions(maxIdle time.Duration) error {
expire := time.Now().UTC().Add(-maxIdle).Format(time.RFC3339)
_, err := p.db.Exec("delete from sessions where modified < ?;", expire)
return err
}
func (p *Phlox) AllSessions() ([]Session, error) {
sessions := make([]Session, 0)
rows, err := p.db.Query("select * from sessions;")
if err != nil {
return sessions, err
}
defer rows.Close()
for rows.Next() {
session, err := extractSession(rows)
if err != nil {
return sessions, err
}
sessions = append(sessions, session)
}
return sessions, nil
}
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