// Copyright 2015 The Vanadium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package watchable

// GetOp represents a store get operation.
type GetOp struct {
	Key []byte
}

// ScanOp represents a store scan operation.
type ScanOp struct {
	Start []byte
	Limit []byte
}

// PutOp represents a store put operation.  The new version is written instead
// of the value to avoid duplicating the user data in the store.  The version
// is used to access the user data of that specific mutation.
type PutOp struct {
	Key         []byte
	Version     []byte
}

// DeleteOp represents a store delete operation.
type DeleteOp struct {
	Key         []byte
}

// LogEntry represents a single store operation. This operation may have been
// part of a transaction, as signified by the Continued boolean. Read-only
// operations (and read-only transactions) are not logged.
type LogEntry struct {
	// The store operation that was performed.
	Op any

	// Time when the operation was committed in nanoseconds since the epoch.
	// Note: We don't use time.Time here because VDL's time.Time consists of
	// {Seconds int64, Nanos int32}, which is more expensive than a single int64.
	CommitTimestamp int64

	// Operation came from sync (used for echo suppression).
	// TODO(razvanm): this field is specific to syncbase. We should add a
	// generic way to add fields and use that instead.
	FromSync bool

	// If true, this entry is followed by more entries that belong to the same
	// commit as this entry.
	Continued bool
}