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package backend
import (
"errors"
)
// An error that should be returned by User.CreateMessage when the message size
// is too big.
var ErrTooBig = errors.New("Message size exceeding limit")
// A backend that supports retrieving per-user message size limits.
type AppendLimitBackend interface {
Backend
// Get the fixed maximum message size in octets that the backend will accept
// when creating a new message. If there is no limit, return nil.
CreateMessageLimit() *uint32
}
// A user that supports retrieving per-user message size limits.
type AppendLimitUser interface {
User
// Get the fixed maximum message size in octets that the backend will accept
// when creating a new message. If there is no limit, return nil.
//
// This overrides the global backend limit.
CreateMessageLimit() *uint32
}
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