// 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 nosql

import (
	"v.io/v23/security/access"
)

// BatchOptions configures a batch.
// TODO(sadovsky): Add more options, e.g. to configure isolation, timeouts,
// whether to track the read set and/or write set, etc.
// TODO(sadovsky): Maybe add a DefaultBatchOptions() function that initializes
// BatchOptions with our desired defaults. Clients would be encouraged to
// initialize their BatchOptions object using that function and then modify it
// to their liking.
type BatchOptions struct {
	// Arbitrary string, typically used to describe the intent behind a batch.
	// Hints are surfaced to clients during conflict resolution.
	// TODO(sadovsky): Use "any" here?
	Hint string

	// ReadOnly specifies whether the batch should allow writes.
	// If ReadOnly is set to true, Abort() should be used to release any resources
	// associated with this batch (though it is not strictly required), and
	// Commit() will always fail.
	ReadOnly bool
}

// PrefixPermissions represents a pair of (prefix, perms).
type PrefixPermissions struct {
	Prefix string
	Perms  access.Permissions
}

// KeyValue is a key-value pair.
type KeyValue struct {
	Key   string
	Value []byte
}

// SyncGroupSpec contains the specification for a SyncGroup.
type SyncGroupSpec struct {
	// Human readable description.
	Description string

	// Permissions for the SyncGroup.
	Perms access.Permissions

	// SyncGroup prefixes (relative to the database).  Prefixes
	// must take the form "<tableName>/<rowKeyPrefix>" where
	// tableName is non-empty.
	Prefixes []string

	// Mount tables at which to advertise this SyncGroup. These
	// are the mount tables used for rendezvous in addition to the
	// one in the neighborhood. Typically, we will have only one
	// entry.  However, an array allows mount tables to be changed
	// over time.
	//
	// TODO(hpucha): Figure out a convention for
	// advertising SyncGroups in the mount table.
	MountTables []string

	// Option to change the privacy of the SyncGroup. Configures
	// whether blobs in a SyncGroup can be served to clients
	// holding blobrefs obtained from other SyncGroups.
	IsPrivate bool
}

// SyncGroupMemberInfo contains per-member metadata.
type SyncGroupMemberInfo struct {
	SyncPriority byte
}