95 lines
3.3 KiB
C#
95 lines
3.3 KiB
C#
using System;
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using System.Collections.Generic;
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using Knot.Shared.Kernel;
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using MongoDB.Bson.Serialization.Attributes;
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namespace Knot.Modules.Messaging.Domain;
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/// <summary>
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/// Абстрактная база агрегата Сообщение.
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/// </summary>
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[BsonDiscriminator(RootClass = true)]
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[BsonKnownTypes(typeof(TextMessage), typeof(MediaMessage), typeof(StoryMessage), typeof(PollMessage))]
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public abstract class Message : AggregateRoot<Guid>
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{
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// ================== Базовые поля ==================
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public Guid ChatId { get; protected set; }
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public Guid SenderId { get; protected set; }
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public DateTime CreatedAt { get; protected set; }
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public long SequenceId { get; protected set; }
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public void SetSequenceId(long sequenceId)
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{
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SequenceId = sequenceId;
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}
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// ================== Опциональные метаданные (общего назначения) ==================
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public Guid? ReplyToId { get; protected set; }
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public Guid? ForwardedFromId { get; protected set; }
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// ================== Флаги ==================
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public MessageState State { get; protected set; }
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// ================== Абстрактные / Виртуальные свойства ==================
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public abstract string Type { get; }
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public abstract string? Content { get; protected set; }
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public bool IsEdited => HasState(MessageState.IsEdited);
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public bool IsDeleted => HasState(MessageState.IsDeleted);
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public bool IsDeletedForUser(Guid userId) => _deletedFor.Exists(d => d.UserId == userId);
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// ================== Связанные коллекции (общего назначения) ==================
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protected List<DeletedMessage> _deletedFor = new();
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public IReadOnlyCollection<DeletedMessage> DeletedFor => _deletedFor.AsReadOnly();
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// ================== Инфраструктурный конструктор EF ==================
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protected Message() : base(Guid.Empty) { }
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protected Message(
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Guid id,
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Guid chatId,
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Guid senderId,
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Guid? replyToId,
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Guid? forwardedFromId,
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DateTime createdAt,
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bool isImported) : base(id)
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{
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ChatId = chatId;
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SenderId = senderId;
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ReplyToId = replyToId;
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ForwardedFromId = forwardedFromId;
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CreatedAt = createdAt;
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if (isImported) AddState(MessageState.IsImported);
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}
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// ================== Управление Состоянием ==================
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public void AddState(MessageState state) => State |= state;
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public void RemoveState(MessageState state) => State &= ~state;
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public bool HasState(MessageState state) => (State & state) == state;
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// ================== Общие операции ==================
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public virtual void Delete()
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{
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AddState(MessageState.IsDeleted);
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RaiseDomainEvent(new MessageDeletedDomainEvent(Id, ChatId));
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}
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public virtual void Edit(string newContent)
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{
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Content = newContent;
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AddState(MessageState.IsEdited);
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RaiseDomainEvent(new MessageEditedDomainEvent(Id, ChatId, newContent));
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}
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public void DeleteForUser(Guid userId)
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{
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if (!_deletedFor.Exists(x => x.UserId == userId))
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{
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_deletedFor.Add(new DeletedMessage(Id, userId));
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}
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}
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}
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