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// Copyright © 2024 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 model
// MsgBurnDeadline 单条消息的「阅后即焚截止时间」记录。
// 在 MarkMsgsAsRead / MarkConversationAsRead（ ）
// (UserID, ConversationID, Seq) 维度写入。读取时间锁定后续不再覆盖。
//
// 当当前时间 > DeadlineMs 时，
// 推进到 max(已过期 seq) + 1，
type MsgBurnDeadline struct {
UserID string ` bson:"user_id" `
ConversationID string ` bson:"conversation_id" `
Seq int64 ` bson:"seq" `
// DeadlineMs 截止时间戳（毫秒）；超过即可被 cron 收走推进 min_seq。
DeadlineMs int64 ` bson:"deadline_ms" `
// CreateTime 写入时刻（毫秒）；用于排查/审计。
CreateTime int64 ` bson:"create_time" `
}
