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Domains/ApplicantDomain/Address.cs

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+namespace Domains.ApplicantDomain;
+
+/// Model of address
+/// <remarks>Owned</remarks>
+public class Address
+{
+    /// Country part of address
+    public string Country { get; set; } = null!;
+
+    /// City part of address
+    public string City { get; set; } = null!;
+
+    /// Street part of address
+    public string Street { get; set; } = null!;
+
+    /// Building part of address
+    public string Building { get; set; } = null!;
+}

Domains/ApplicantDomain/Applicant.cs

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+namespace Domains.ApplicantDomain;
+
+/// Model of an applicant
+public class Applicant : IEntity
+{
+    /// Unique identifier of the <see cref="Applicant"/>
+    public Guid Id { get; private set; } = Guid.NewGuid();
+
+    public Guid UserId { get; set; }
+
+    /// Full name of the <see cref="Applicant"/>
+    public Name Name { get; set; } = null!;
+
+    /// Passport of <see cref="Applicant"/>
+    public Passport Passport { get; set; } = null!;
+
+    /// Date of birth of the <see cref="Applicant"/>
+    public DateTime BirthDate { get; set; }
+
+    /// Country of birth of the <see cref="Applicant"/>
+    public string CountryOfBirth { get; set; } = null!;
+
+    /// City of birth of the <see cref="Applicant"/>
+    public string CityOfBirth { get; set; } = null!;
+
+    /// Citizenship of <see cref="Applicant"/>
+    public string Citizenship { get; set; } = null!;
+
+    /// Citizenship by birth of <see cref="Applicant"/>
+    public string CitizenshipByBirth { get; set; } = null!;
+
+    /// Gender of <see cref="Applicant"/>
+    public Gender Gender { get; set; }
+
+    /// Marital status of <see cref="Applicant"/>
+    public MaritalStatus MaritalStatus { get; set; }
+
+    /// Full name of the <see cref="Applicant"/>'s father
+    public Name FatherName { get; set; } = null!;
+
+    /// Full name of the <see cref="Applicant"/>'s mother
+    public Name MotherName { get; set; } = null!;
+
+    /// Position of <see cref="Applicant"/>
+    public string JobTitle { get; set; } = null!;
+
+    /// Place of <see cref="Applicant"/>'s work
+    public PlaceOfWork PlaceOfWork { get; set; } = null!;
+
+    /// Is <see cref="Applicant"/> a non-resident
+    public bool IsNonResident { get; set; }
+}

Domains/ApplicantDomain/Gender.cs

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+namespace Domains.ApplicantDomain;
+
+public enum Gender
+{
+    Unknown,
+    Male,
+    Female,
+    Turkish
+}

Domains/ApplicantDomain/MaritalStatus.cs

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+namespace Domains.ApplicantDomain;
+
+public enum MaritalStatus
+{
+    Other,
+    Married,
+    Unmarried,
+    Separated,
+    WidowOrWidower
+}

Domains/ApplicantDomain/Name.cs

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+namespace Domains.ApplicantDomain;
+
+/// Model of full name
+/// <remarks>Owned</remarks>
+public class Name
+{
+    public string FirstName { get; set; } = null!;
+
+    public string Surname { get; set; } = null!;
+
+    public string? Patronymic { get; set; }
+}

Domains/ApplicantDomain/Passport.cs

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+namespace Domains.ApplicantDomain;
+
+/// Model of passport
+/// <remarks>Owned</remarks>
+public class Passport
+{
+    /// Number of <see cref="Passport"/>
+    public string Number { get; set; } = null!;
+
+    /// Issuing authority of <see cref="Passport"/>
+    public string Issuer { get; set; } = null!;
+
+    /// Date of issue
+    public DateTime IssueDate { get; set; }
+
+    /// Date when the <see cref="Passport"/> expires
+    public DateTime ExpirationDate { get; set; }
+}

Domains/ApplicantDomain/PlaceOfWork.cs

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+namespace Domains.ApplicantDomain;
+
+public class PlaceOfWork : IEntity
+{
+    /// Unique identifier of <see cref="PlaceOfWork"/>
+    public Guid Id { get; private set; } = Guid.NewGuid();
+
+    /// Name of hirer
+    public string Name { get; set; } = null!;
+
+    /// <see cref="ApplicantDomain.Address"/> of hirer
+    public Address Address { get; set; } = null!;
+
+    /// Phone number of hirer
+    public string PhoneNum { get; set; } = null!;
+}

Domains/ConfigurationConstraints.cs

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+namespace Domains;
+
+public static class ConfigurationConstraints
+{
+    public const int CityNameLength = 70;
+    public const int CountryNameLength = 70;
+    public const int CitizenshipLength = 50;
+    public const int ReentryPermitNumberLength = 25;
+    public const int IssuerNameLength = 200;
+    public const int VisaNameLength = 70;
+    public const int StreetNameLength = 100;
+    public const int PlaceOfWorkNameLength = 200;
+    public const int NameLength = 50;
+    public const int BuildingNumberLength = 10;
+    public const int PassportNumberLength = 20;
+    public const int PhoneNumberLength = 13;
+    public const int PhoneNumberMinLength = 11;
+    public const int EmailLength = 254;
+    public const int PasswordLength = 50;
+    public const int ApplicantMinAge = 14;
+    public const int JobTitleLength = 50;
+    public const int MaxValidDays = 90;
+}

Domains/Domains.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <TargetFramework>net8.0</TargetFramework>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+    </PropertyGroup>
+
+    <ItemGroup>
+      <PackageReference Include="AutoMapper" Version="13.0.1" />
+    </ItemGroup>
+
+</Project>

Domains/IEntity.cs

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+namespace Domains;
+
+/// Interface that every entity should inherit from
+public interface IEntity
+{
+    public Guid Id { get; }
+}

Domains/Users/Role.cs

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+namespace Domains.Users;
+
+/// Role of <see cref="User"/>
+public enum Role
+{
+    /// Requests visa applications
+    Applicant,
+    /// Approves or declines applications
+    ApprovingAuthority,
+    /// Manages approving authorities
+    Admin
+}

Domains/Users/User.cs

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+namespace Domains.Users;
+
+public class User : IEntity
+{
+    /// Unique Identifier of <see cref="User"/>
+    public Guid Id { get; private set; } = Guid.NewGuid();
+
+    public Role Role { get; set; }
+
+    public string Email { get; set; } = null!;
+
+    public string Password { get; set; } = null!;
+}

Domains/VisaApplicationDomain/ApplicationStatus.cs

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+namespace Domains.VisaApplicationDomain;
+
+public enum ApplicationStatus
+{
+    /// Waits for approve
+    Pending,
+    Approved,
+    Rejected,
+    /// Closed by applicant
+    Closed
+}

Domains/VisaApplicationDomain/PastVisa.cs

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+using Domains.ApplicantDomain;
+
+namespace Domains.VisaApplicationDomain;
+
+/// Visa that <see cref="Applicant"/> already had
+/// <remarks>Owned</remarks>
+public class PastVisa
+{
+    /// Date of issue
+    public DateTime IssueDate { get; set; }
+
+    /// Name of visa
+    public string Name { get; set; } = null!;
+
+    /// Date when visa expires
+    public DateTime ExpirationDate { get; set; }
+}

Domains/VisaApplicationDomain/PastVisit.cs

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+using Domains.ApplicantDomain;
+
+namespace Domains.VisaApplicationDomain;
+
+/// Visit in a Schengen country that <see cref="Applicant"/> already had
+/// <remarks>Owned</remarks>
+public class PastVisit
+{
+    /// First day of <see cref="PastVisit"/>
+    public DateTime StartDate { get; set; }
+
+    /// Last day of <see cref="PastVisit"/>
+    public DateTime EndDate { get; set; }
+
+    /// Destination country of <see cref="PastVisit"/>
+    public string DestinationCountry { get; set; } = null!;
+}

Domains/VisaApplicationDomain/PermissionToDestCountry.cs

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+namespace Domains.VisaApplicationDomain;
+
+/// Permission to enter the destination country
+/// <remarks>Owned</remarks>
+public class PermissionToDestCountry
+{
+    /// Date when <see cref="PermissionToDestCountry"/> expires
+    public DateTime ExpirationDate { get; set; }
+
+    /// Issuing authority
+    public string Issuer { get; set; } = null!;
+}

Domains/VisaApplicationDomain/ReentryPermit.cs

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+namespace Domains.VisaApplicationDomain;
+
+/// Permission to enter a country the issuer wants to come from
+/// <remarks>Owned</remarks>
+public class ReentryPermit
+{
+    /// Number of <see cref="ReentryPermit"/>
+    public string Number { get; set; } = null!;
+
+    /// Date when <see cref="ReentryPermit"/> expires
+    public DateTime ExpirationDate { get; set; }
+}

Domains/VisaApplicationDomain/RequestedNumberOfEntries.cs

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+namespace Domains.VisaApplicationDomain;
+
+/// Requested number of entries
+public enum RequestedNumberOfEntries
+{
+    Many,
+    One,
+    Two
+}

Domains/VisaApplicationDomain/VisaApplication.cs

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+using Domains.ApplicantDomain;
+
+namespace Domains.VisaApplicationDomain;
+
+/// Model of visit request
+public class VisaApplication : IEntity
+{
+    /// Unique identifier of <see cref="VisaApplication"/>
+    public Guid Id { get; private set; } = Guid.NewGuid();
+
+    /// Identifier of the <see cref="Applicant"/>
+    public Guid ApplicantId { get; set; }
+
+    /// Status of application
+    public ApplicationStatus Status { get; set; }
+
+    /// <inheritdoc cref="Domains.VisaApplicationDomain.ReentryPermit"/>
+    /// <remarks>always null if <see cref="Applicant"/> is not a non-resident</remarks>
+    public ReentryPermit? ReentryPermit { get; set; }
+
+    /// Country that <see cref="Applicant"/> wants to visit
+    public string DestinationCountry { get; set; } = null!;
+
+    /// List of <see cref="PastVisa"/> that applicant had before
+    public List<PastVisa> PastVisas { get; set; } = null!;
+
+    /// Permission to enter the destination country of <see cref="Applicant"/>
+    /// <remarks>always null if <see cref="DestinationCountry"/> is Schengen</remarks>
+    public PermissionToDestCountry? PermissionToDestCountry { get; set; }
+
+    public List<PastVisit> PastVisits { get; set; } = null!;
+
+    /// <see cref="Domains.VisaApplicationDomain.VisaCategory"/>
+    public VisaCategory VisaCategory { get; set; }
+
+    /// Is for group
+    public bool ForGroup { get; set; }
+
+    /// <see cref="Domains.VisaApplicationDomain.RequestedNumberOfEntries"/>
+    public RequestedNumberOfEntries RequestedNumberOfEntries { get; set; }
+
+    /// When application was created
+    public DateTime RequestDate { get; set; }
+
+    /// Valid days requested
+    public int ValidDaysRequested { get; set; }
+}

Domains/VisaApplicationDomain/VisaCategory.cs

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+namespace Domains.VisaApplicationDomain;
+
+/// Category of visa
+public enum VisaCategory
+{
+    Transit,
+    ShortDated
+}