(B) update doctor-related entities

Clinics.Backend/Domain/Entities/People/Doctors/Doctor.cs

 using Domain.Entities.People.Doctors.Shared;
 using Domain.Entities.People.Doctors.Shared.Constants.DoctorStatusValues;
 using Domain.Entities.People.Shared;
+using Domain.Exceptions.InvalidValue;
 using Domain.Primitives;
 
 namespace Domain.Entities.People.Doctors;
 
-public sealed class Doctor(int id) : Entity(id)
+public sealed class Doctor : Entity
 {
+    #region Private ctor
+    private Doctor(int id) : base(id)
+    {
+    }
+
+    private Doctor(int id, PersonalInfo personalInfo) : base(id)
+    {
+        PersonalInfo = personalInfo;
+        Status = DoctorStatuses.Available;
+    }
+    #endregion
+
     #region Properties
 
     public PersonalInfo PersonalInfo { get; set; } = null!;
@@ -20,4 +33,54 @@ public sealed class Doctor(int id) : Entity(id)
     #endregion
 
     #endregion
+
+    #region Methods
+
+    #region Static factory
+    public static Doctor Create(string firstName, string middleName, string lastName)
+    {
+        PersonalInfo personalInfo;
+        try
+        {
+            personalInfo = PersonalInfo.Create(firstName, middleName, lastName);
+        }
+        catch
+        {
+            throw;
+        }
+
+        return new Doctor(0, personalInfo);
+    }
+    #endregion
+
+    #region Add phone
+    public void AddPhone(string phone, string? number = null)
+    {
+        DoctorPhone doctorPhone;
+        try
+        {
+            doctorPhone = DoctorPhone.Create(phone, number);
+        }
+        catch
+        {
+            throw;
+        }
+
+        if (Phones is null)
+            Phones = [];
+
+        Phones.Add(doctorPhone);
+    }
+    #endregion
+
+    #region Change status
+    public void ChangeStatusTo(DoctorStatus status)
+    {
+        if (status == DoctorStatuses.Available || status == DoctorStatuses.Busy || status == DoctorStatuses.Working)
+            Status = status;
+        throw new InvalidValuesDomainException<DoctorStatus>();
+    }
+    #endregion
+
+    #endregion
 }

Clinics.Backend/Domain/Entities/People/Doctors/Shared/Constants/DoctorStatusValues/DoctorStatus.cs

-using Domain.Primitives;
-
-namespace Domain.Entities.People.Doctors.Shared.Constants.DoctorStatusValues;
-
-public sealed class DoctorStatus(int id) : Entity(id)
-{
-    #region Properties
-
-    public string Name { get; set; } = null!;
-
-    #endregion
-}

Clinics.Backend/Domain/Entities/People/Doctors/Shared/DoctorPhone.cs

-using Domain.Primitives;
+using Domain.Exceptions.InvalidValue;
+using Domain.Primitives;
 
 namespace Domain.Entities.People.Doctors.Shared;
 
 // TODO: Convert phone property to a value object
-public sealed class DoctorPhone(int id) : Entity(id)
+public sealed class DoctorPhone : Entity
 {
+    #region Private ctor
+    private DoctorPhone(int id) : base(id) { }
+
+    private DoctorPhone(int id, string phone, string? name = null) : base(id)
+    {
+        Phone = phone;
+        Name = name;
+    }
+    #endregion
+
     #region Properties
 
     public string? Name { get; set; }
@@ -12,4 +23,19 @@ public sealed class DoctorPhone(int id) : Entity(id)
     public string Phone { get; set; } = null!;
 
     #endregion
+
+    #region Methods
+
+    #region Static factory
+
+    public static DoctorPhone Create(string phone, string? name)
+    {
+        if (phone is null)
+            throw new InvalidValuesDomainException<DoctorPhone>();
+        return new DoctorPhone(0, phone, name);
+    }
+
+    #endregion
+
+    #endregion
 }

Clinics.Backend/Domain/Entities/People/Doctors/Shared/DoctorStatusValues/DoctorStatus.cs

+using Domain.Exceptions.InvalidValue;
+using Domain.Primitives;
+
+namespace Domain.Entities.People.Doctors.Shared.Constants.DoctorStatusValues;
+
+public sealed class DoctorStatus : Entity
+{
+    #region Private ctor
+    private DoctorStatus(int id) : base(id)
+    {
+
+    }
+
+    private DoctorStatus(int id, string name) : base(id)
+    {
+        Name = name;
+    }
+    #endregion
+
+    #region Properties
+
+    public string Name { get; set; } = null!;
+
+    #endregion
+
+    #region Methods
+
+    #region Static factory
+    public static DoctorStatus Create(string name, int? id)
+    {
+        if (name is null)
+            throw new InvalidValuesDomainException<DoctorStatus>();
+        if (id is not null)
+        {
+            if (id < 0)
+                throw new InvalidValuesDomainException<DoctorStatus>();
+            return new DoctorStatus(id.Value, name);
+        }
+
+        return new DoctorStatus(0, name);
+    }
+    #endregion
+
+    #endregion
+}

Clinics.Backend/Domain/Entities/People/Doctors/Shared/Constants/DoctorStatusValues/DoctorStatuses.cs → Clinics.Backend/Domain/Entities/People/Doctors/Shared/DoctorStatusValues/DoctorStatuses.cs

@@ -4,11 +4,11 @@ public static class DoctorStatuses
 {
     #region Constant id values
 
-    public static int Available => 1;
+    public static DoctorStatus Available => DoctorStatus.Create("متاح", 1);
 
-    public static int Working => 2;
+    public static DoctorStatus Working => DoctorStatus.Create("لديه مريض", 1);
 
-    public static int Busy => 3;
+    public static DoctorStatus Busy => DoctorStatus.Create("مشغول", 1);
 
     #endregion
 }