Initial commit - ERP

Managerial/Communication/Chat/Chat.Domain/Entities/Conversation.cs

@@ -0,0 +1,54 @@
+using System;
+
+namespace Chat.Domain.Entities;
+
+/// <summary>
+/// Represents a direct messaging conversation between two users.
+/// </summary>
+public class Conversation
+{
+    /// <summary>
+    /// Unique identifier for the conversation.
+    /// </summary>
+    public Guid Id { get; set; }
+
+    /// <summary>
+    /// Foreign key to the first participant (User).
+    /// </summary>
+    public Guid Participant1Id { get; set; }
+
+    /// <summary>
+    /// Foreign key to the second participant (User).
+    /// </summary>
+    public Guid Participant2Id { get; set; }
+
+    /// <summary>
+    /// Date and time when the conversation was created.
+    /// </summary>
+    public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
+
+    /// <summary>
+    /// Foreign key to the last message in the conversation. Can be null if no messages exist.
+    /// </summary>
+    public Guid? LastMessageId { get; set; }
+
+    /// <summary>
+    /// Date and time when the last message was sent in the conversation.
+    /// </summary>
+    public DateTime? LastMessageAt { get; set; }
+
+    /// <summary>
+    /// Number of unread messages for participant 1.
+    /// </summary>
+    public int UnreadCount1 { get; set; } = 0;
+
+    /// <summary>
+    /// Number of unread messages for participant 2.
+    /// </summary>
+    public int UnreadCount2 { get; set; } = 0;
+
+    // Navigation properties (to User and Message entities when they exist)
+    // public User Participant1 { get; set; }
+    // public User Participant2 { get; set; }
+    // public Message LastMessage { get; set; }
+}

Managerial/Communication/Chat/Chat.Domain/Entities/Message.cs

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+using Chat.Domain.Enums;
+using System;
+
+namespace Chat.Domain.Entities;
+
+public class Message
+{
+    public Guid Id { get; set; }
+
+    public string Content { get; set; } = string.Empty;
+
+    public Guid SenderId { get; set; }
+
+    public Guid ReceiverId { get; set; }
+
+    public DateTime SentAt { get; set; } = DateTime.UtcNow;
+
+    public bool IsRead { get; set; } = false;
+
+    public DateTime? ReadAt { get; set; }
+
+    public bool IsDeleted { get; set; } = false;
+
+    public DateTime? DeletedAt { get; set; }
+
+    public bool IsEdited { get; set; } = false;
+
+    public DateTime? EditedAt { get; set; }
+
+    public MessageStatus Status { get; set; } = MessageStatus.Sent;
+
+    // Navigation properties (to User entity when it exists)
+    // public User Sender { get; set; }
+    // public User Receiver { get; set; }
+}

Managerial/Communication/Chat/Chat.Domain/Entities/UserPresence.cs

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+using Chat.Domain.Enums;
+using System;
+
+namespace Chat.Domain.Entities;
+
+/// <summary>
+/// Represents a user's presence status and connection information for real-time features.
+/// </summary>
+public class UserPresence
+{
+    /// <summary>
+    /// Primary key - the unique identifier of the user.
+    /// </summary>
+    public Guid UserId { get; set; }
+
+    /// <summary>
+    /// The current status of the user (Online, Offline, Away).
+    /// </summary>
+    public UserStatus Status { get; set; } = UserStatus.Offline;
+
+    /// <summary>
+    /// Date and time when the user was last seen.
+    /// </summary>
+    public DateTime LastSeenAt { get; set; } = DateTime.UtcNow;
+
+    /// <summary>
+    /// SignalR connection ID for real-time messaging. Can be null if the user is not connected.
+    /// </summary>
+    public string? ConnectionId { get; set; }
+
+    // Navigation property (to User entity when it exists)
+    // public User User { get; set; }
+}