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// Copyright © 2024 OpenIM. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package database
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import (
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"context"
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"github.com/openimsdk/open-im-server/v3/pkg/common/storage/model"
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)
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// ExpiredBurnGroup 表示某个 (UserID, ConversationID) 上需要被推进 min_seq 的 seq 集合。
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type ExpiredBurnGroup struct {
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UserID string
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ConversationID string
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// MaxSeq 当前批次中最大的过期 seq；推进 min_seq 时使用 MaxSeq + 1。
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MaxSeq int64
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// Seqs 当前批次实际涉及的所有过期 seq，便于精确删除已处理的 deadline 记录。
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Seqs []int64
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}
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// MsgBurnDeadline 持久化每条消息对每个用户的「阅后即焚截止时间」。
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// 写入位置：msg 服务 MarkMsgsAsRead / MarkConversationAsRead（单聊）。
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// 消费位置：conversation 服务 ClearBurnExpiredMsgs cron 入口。
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type MsgBurnDeadline interface {
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// UpsertIfAbsent 仅在 (UserID, ConversationID, Seq) 不存在时插入；
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// 已存在则不覆盖，保证「首次阅读时刻」决定 deadline。
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UpsertIfAbsent(ctx context.Context, items []*model.MsgBurnDeadline) error
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// FindExpiredGroups 查询 deadline_ms <= nowMs 的记录，按 (UserID, ConversationID)
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// 聚合并返回每组的最大 seq 与所涉及的 seq 列表。limit 限制返回的 group 数量。
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FindExpiredGroups(ctx context.Context, nowMs int64, limit int) ([]*ExpiredBurnGroup, error)
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// DeleteByUserConversationSeqs 删除某 (UserID, ConversationID) 下指定 seq 列表的 deadline 记录。
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// 一般在成功推进 min_seq 后调用。
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DeleteByUserConversationSeqs(ctx context.Context, userID, conversationID string, seqs []int64) error
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}
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