添加项目文件。
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using IM.Commons.IntegrationEvents;
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using IM.DomainCommons;
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using MessageService.Domain.Enums;
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using MessageService.Domain.Events;
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using MessageService.Domain.KeyObjects;
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using MessageService.Domain.Tools;
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using System.Text.Json;
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namespace MessageService.Domain.Entities
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{
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public class Message : AggregateRootEntity
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{
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/// <summary>
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/// 聊天类型
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/// （0：私聊,1：群聊）
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/// </summary>
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public ChatType ChatType { get; private set; }
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/// <summary>
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/// 消息类型
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/// (0:文本,1：图片,2：语音,3：视频,4：文件，5：语音聊天,6：视频聊天)
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/// </summary>
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public MessageType MsgType { get; private set; }
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public Guid ClientMsgId { get; private set; }
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/// <summary>
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/// 消息内容
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/// </summary>
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public MessageContent Content { get; private set; } = null!;
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/// <summary>
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/// 发送者
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/// </summary>
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public Guid SenderId { get; private set; }
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/// <summary>
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/// 接收者（私聊为用户ID，群聊为群聊ID）
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/// </summary>
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public Guid TargetId { get; private set; }
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/// <summary>
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/// 消息状态(0:已发送,1:已撤回)
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/// </summary>
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public MessageState State { get; private set; } = MessageState.Sent;
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/// <summary>
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/// 消息推送唯一标识符
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/// </summary>
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public string StreamKey { get; private set; }
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/// <summary>
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/// 消息排序标识
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/// </summary>
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public long SequenceId { get; private set; }
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private Message() { }
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private Message(MessageCreateContext ctx, long sequenceId, MessageType messageType
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, MessageContent content
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)
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{
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ChatType = ctx.ChatType;
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SenderId = ctx.SenderId;
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ClientMsgId = ctx.ClientMsgId;
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TargetId = ctx.TargetId;
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SequenceId = sequenceId;
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MsgType = messageType;
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StreamKey = ChatType == ChatType.GROUP ? StreamKeyBuilder.Group(ctx.TargetId) : StreamKeyBuilder.Private(ctx.SenderId, ctx.TargetId);
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Content = content;
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}
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/// <summary>
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/// 文本消息
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/// </summary>
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/// <param name="ctx"></param>
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/// <param name="text">文本内容</param>
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/// <param name="sequenceId"></param>
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/// <returns></returns>
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public static Message BuildTxt(MessageCreateContext ctx, string text, long sequenceId)
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{
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var content = new MessageContent(text, new TextBody(text));
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return new Message(ctx, sequenceId, MessageType.Text, content);
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}
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/// <summary>
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/// 图片消息
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/// </summary>
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/// <param name="ctx"></param>
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/// <param name="url">相对路径</param>
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/// <param name="width">宽度</param>
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/// <param name="height">高度</param>
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/// <param name="thumb">预览图</param>
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/// <param name="sequenceId"></param>
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/// <returns></returns>
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public static Message BuildImg(MessageCreateContext ctx, string url,
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int width, int height, string thumb, long sequenceId)
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{
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var content = new MessageContent("[图片]", new ImageBody(url, width, height, thumb));
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return new Message(ctx, sequenceId, MessageType.Image, content);
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}
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/// <summary>
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/// 视频消息
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/// </summary>
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/// <param name="ctx"></param>
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/// <param name="url"></param>
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/// <param name="width"></param>
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/// <param name="height"></param>
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/// <param name="thumb"></param>
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/// <param name="sequenceId"></param>
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/// <returns></returns>
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public static Message BuildVideo(MessageCreateContext ctx, string url,
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int width, int height, string thumb, long sequenceId)
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{
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var content = new MessageContent("[视频]", new VideoBody(url, width, height, thumb));
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return new Message(ctx, sequenceId, MessageType.Video, content);
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}
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/// <summary>
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/// 语音消息
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/// </summary>
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/// <param name="ctx"></param>
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/// <param name="url"></param>
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/// <param name="duration">持续时间</param>
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/// <param name="sequenceId"></param>
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/// <returns></returns>
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public static Message BuildVoice(MessageCreateContext ctx, string url,
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int duration, long sequenceId)
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{
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var content = new MessageContent("[音频]", new VoiceBody(url, duration));
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return new Message(ctx, sequenceId, MessageType.Voice, content);
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}
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/// <summary>
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/// 文件
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/// </summary>
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/// <param name="ctx"></param>
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/// <param name="url">相对路径</param>
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/// <param name="name">文件名</param>
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/// <param name="size">文件大小（KB）</param>
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/// <param name="format">文件格式</param>
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/// <param name="sequenceId"></param>
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/// <returns></returns>
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public static Message BuildFile(MessageCreateContext ctx, string url,
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string name, long size,
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string format, long sequenceId)
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{
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var content = new MessageContent("[文件]", new FileBody(url, name, size, format));
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return new Message(ctx, sequenceId, MessageType.File, content);
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}
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/// <summary>
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/// 添加扩展字段
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/// </summary>
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/// <param name="key">字段名</param>
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/// <param name="value">值</param>
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/// <returns></returns>
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public Message WithExt(string key, string value)
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{
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var dic = new Dictionary<string, string>();
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dic.Add(key, value);
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Content.RawExt = JsonSerializer.Serialize(dic);
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return this;
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}
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/// <summary>
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/// 添加消息引用
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/// </summary>
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/// <param name="quote"></param>
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/// <returns></returns>
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public Message WithQuote(QuoteInfo quote)
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{
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this.Content.Quote = quote;
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return this;
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}
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/// <summary>
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/// 完成消息
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/// </summary>
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public void Send()
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{
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AddDomainEvent(new MessageCreatedDomainEvent(this));
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}
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public void Withdraw()
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{
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if (State != MessageState.Sent)
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{
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throw new DomainException("消息不可撤回");
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}
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State = MessageState.Withdrwan;
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AddDomainEvent(new MessageWithdrawDomainEvent(this));
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}
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public MsgCreatedEvent ToIntegrationEvent()
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{
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return new MsgCreatedEvent
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{
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Id = this.Id,
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ClientId = this.ClientMsgId, // 假设你有存发送端的设备ID
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ChatType = this.ChatType.ToString(), // 比如 "private" 或 "group"
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MsgType = this.MsgType.ToString() ?? MessageType.Text.ToString(), // 动态获取类型名，或从 Content 里的定义拿
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SenderId = this.SenderId,
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TargetId = this.TargetId,
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State = State.ToString(),
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StreamKey = this.StreamKey,
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SequenceId = this.SequenceId,
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// 核心载荷：利用计算属性触发反序列化，打包成 DTO
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Content = new MsgContent(
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this.Content.Fallback,
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this.Content.Body, // 触发实体内部的反序列化逻辑
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this.Content.Ext,
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this.Content.Quote != null ? new QuoteInfoDto(
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this.Content.Quote.MessageId,
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this.Content.Quote.SenderId,
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this.Content.Quote.SenderName,
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this.Content.Quote.MessageType.ToString(),
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this.Content.Quote.Preview
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) : null
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)
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};
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}
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}
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}
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