// Copyright © 2023 OpenIM. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package cache

import (
	"context"
	relationtb "github.com/openimsdk/open-im-server/v3/pkg/common/storage/model"
)

// FriendCache is an interface for caching friend-related data.
type FriendCache interface {
	BatchDeleter
	CloneFriendCache() FriendCache
	GetFriendIDs(ctx context.Context, ownerUserID string) (friendIDs []string, err error)
	// Called when friendID list changed
	DelFriendIDs(ownerUserID ...string) FriendCache
	// Get single friendInfo from the cache
	GetFriend(ctx context.Context, ownerUserID, friendUserID string) (friend *relationtb.Friend, err error)
	// Delete friend when friend info changed
	DelFriend(ownerUserID, friendUserID string) FriendCache
	// Delete friends when friends' info changed
	DelFriends(ownerUserID string, friendUserIDs []string) FriendCache
}