136 lines
3.4 KiB
C#
136 lines
3.4 KiB
C#
using OrderSupportTicket.Models.Api;
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using System;
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using System.Globalization;
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using WPFCommon.Models;
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namespace OrderSupportTicket.ViewModels;
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/// <summary>
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/// 工单留言板中的单条消息。
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/// </summary>
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public sealed class ChatMessageViewModel : BindableBaseEx
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{
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private string _messageId;
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private int _sequenceNo;
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private string _senderType;
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private string _senderDisplayName;
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private string _content;
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private bool _isRecalled;
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private DateTimeOffset _createdAt;
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public ChatMessageViewModel(TicketMessageDto dto)
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{
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if (dto == null)
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throw new ArgumentNullException(nameof(dto));
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MessageId = dto.MessageId;
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SequenceNo = dto.SequenceNo;
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SenderType = dto.SenderType;
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IsRecalled = dto.Recalled;
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SenderDisplayName = string.IsNullOrWhiteSpace(dto.SenderName)
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? (IsCustomer ? "我" : "客服")
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: dto.SenderName;
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Content = dto.Recalled
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? "该消息已撤回"
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: (dto.Text ?? string.Empty);
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CreatedAt = ParseTimestamp(dto.CreatedAt);
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}
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/// <summary>
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/// 消息唯一 ID。
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/// </summary>
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public string MessageId
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{
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get => _messageId;
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private set => SetValue(ref _messageId, value);
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}
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/// <summary>
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/// 工单内连续递增的消息序号。
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/// </summary>
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public int SequenceNo
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{
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get => _sequenceNo;
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private set => SetValue(ref _sequenceNo, value);
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}
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/// <summary>
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/// 消息发送方类型。
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/// </summary>
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public string SenderType
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{
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get => _senderType;
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private set
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{
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if (SetValue(ref _senderType, value))
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RaisePropertyChanged(nameof(IsCustomer));
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}
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}
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/// <summary>
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/// 消息发送方显示名称。
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/// </summary>
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public string SenderDisplayName
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{
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get => _senderDisplayName;
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private set => SetValue(ref _senderDisplayName, value);
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}
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/// <summary>
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/// 消息展示内容；撤回消息显示固定提示文本。
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/// </summary>
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public string Content
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{
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get => _content;
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private set => SetValue(ref _content, value);
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}
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/// <summary>
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/// 消息是否已撤回。
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/// </summary>
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public bool IsRecalled
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{
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get => _isRecalled;
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private set => SetValue(ref _isRecalled, value);
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}
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/// <summary>
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/// 消息发送时间。
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/// </summary>
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public DateTimeOffset CreatedAt
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{
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get => _createdAt;
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private set
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{
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if (SetValue(ref _createdAt, value))
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RaisePropertyChanged(nameof(CreatedAtText));
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}
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}
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/// <summary>
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/// 当前消息是否由客户发送。
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/// </summary>
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public bool IsCustomer =>
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string.Equals(SenderType, "customer", StringComparison.OrdinalIgnoreCase);
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/// <summary>
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/// 适合聊天界面展示的本地时间文本。
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/// </summary>
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public string CreatedAtText =>
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CreatedAt == default
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? string.Empty
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: CreatedAt.ToLocalTime().ToString("MM-dd HH:mm", CultureInfo.CurrentCulture);
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private static DateTimeOffset ParseTimestamp(string value)
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{
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if (DateTimeOffset.TryParse(
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value,
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CultureInfo.InvariantCulture,
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DateTimeStyles.AssumeUniversal,
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out var parsed))
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{
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return parsed;
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}
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return default;
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}
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}
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