c7d9d7d25d
One conditional UPDATE writes it at most once per five minutes per user. A failed write is logged and never fails authentication, and no user payload carries the column.
28 lines
871 B
Go
28 lines
871 B
Go
package classes
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import (
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"context"
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"fmt"
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"gorm.io/gorm"
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)
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// TouchLastSeen stamps users.last_seen with the current time, at most once
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// per five minutes per user: it is one UPDATE that matches the row only when
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// last_seen is NULL or older than five minutes, so a busy client costs one
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// write per window. It does not touch updated_at, and it applies to a
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// deactivated user too. Login and token refresh call it and ignore its
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// error apart from logging it: authentication never depends on this write.
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func TouchLastSeen(ctx context.Context, db *gorm.DB, userID uint) error {
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if db == nil {
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return fmt.Errorf("golem15.user: gorm handle is missing")
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}
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if userID == 0 {
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return nil
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}
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return fresh(ctx, db).Exec(
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`UPDATE users SET last_seen = NOW() WHERE id = ? AND (last_seen IS NULL OR last_seen < NOW() - INTERVAL '5 minutes')`,
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userID,
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).Error
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}
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