pronounsfu/backend/db/tokens.go

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package db
import (
"context"
"time"
"emperror.dev/errors"
"github.com/georgysavva/scany/pgxscan"
"github.com/jackc/pgx/v4"
"github.com/rs/xid"
)
type Token struct {
UserID xid.ID
TokenID xid.ID
Invalidated bool
Created time.Time
Expires time.Time
}
func (db *DB) TokenValid(ctx context.Context, userID, tokenID xid.ID) (valid bool, err error) {
sql, args, err := sq.Select("*").From("tokens").
Where("user_id = ?", userID).
Where("token_id = ?", tokenID).
ToSql()
if err != nil {
return false, errors.Wrap(err, "building sql")
}
var t Token
err = pgxscan.Get(ctx, db, &t, sql, args...)
if err != nil {
if errors.Cause(err) == pgx.ErrNoRows {
return false, nil
}
return false, errors.Wrap(err, "getting from database")
}
now := time.Now()
return !t.Invalidated && t.Created.Before(now) && t.Expires.After(now), nil
}
func (db *DB) Tokens(ctx context.Context, userID xid.ID) (ts []Token, err error) {
sql, args, err := sq.Select("*").From("tokens").
Where("user_id = ?", userID).
Where("expires > ?", time.Now()).
OrderBy("created").
ToSql()
if err != nil {
return nil, errors.Wrap(err, "building sql")
}
err = pgxscan.Select(ctx, db, &ts, sql, args...)
if err != nil {
return nil, errors.Wrap(err, "getting from database")
}
return ts, nil
}
// 3 months, might be customizable later
const ExpiryTime = 3 * 30 * 24 * time.Hour
// SaveToken saves a token to the database.
func (db *DB) SaveToken(ctx context.Context, userID xid.ID, tokenID xid.ID) (t Token, err error) {
sql, args, err := sq.Insert("tokens").
Columns("user_id", "token_id", "expires").
Values(userID, tokenID, time.Now().Add(ExpiryTime)).
Suffix("RETURNING *").
ToSql()
if err != nil {
return t, errors.Wrap(err, "building sql")
}
err = pgxscan.Get(ctx, db, &t, sql, args...)
if err != nil {
return t, errors.Wrap(err, "inserting token")
}
return t, nil
}
func (db *DB) InvalidateToken(ctx context.Context, userID xid.ID, tokenID xid.ID) (t Token, err error) {
sql, args, err := sq.Update("tokens").
Where("user_id = ?", userID).
Where("token_id = ?", tokenID).
Set("invalidated", true).
Suffix("RETURNING *").
ToSql()
if err != nil {
return t, errors.Wrap(err, "building sql")
}
err = pgxscan.Get(ctx, db, &t, sql, args...)
if err != nil {
return t, errors.Wrap(err, "invalidating token")
}
return t, nil
}
func (db *DB) InvalidateAllTokens(ctx context.Context, tx pgx.Tx, userID xid.ID) error {
sql, args, err := sq.Update("tokens").Where("user_id = ?", userID).Set("invalidated", true).ToSql()
if err != nil {
return errors.Wrap(err, "building sql")
}
_, err = tx.Exec(ctx, sql, args...)
if err != nil {
return errors.Wrap(err, "executing query")
}
return nil
}