UserService/UserService/DataModels/ModelBuilderExtensions.cs

using Microsoft.EntityFrameworkCore;

namespace UserService.DataModels
{
    public static class ModelBuilderExtensions
    {
        public static void Seed(this ModelBuilder modelBuilder)
        {
            var users = new OrganizationUnit {CommonName = "Users", Id = -2};
            var groups = new OrganizationUnit {CommonName = "Groups", Id = -1};
            modelBuilder.Entity<OrganizationUnit>().HasData(users, groups);
            var user = new User {CommonName = "holger", IsActive = true, Id = -4, ParentId = users.Id};
            modelBuilder.Entity<User>().HasData(user);
            var secGroup = new SecurityGroup {CommonName = "Global Admin", Id = -3, ParentId = groups.Id};
            modelBuilder.Entity<SecurityGroup>().HasData(secGroup);

            modelBuilder.Entity<UserMember>()
                .HasData(new UserMember {MemberId = secGroup.Id, UserId = user.Id});
        }

        public static void CreateRelations(this ModelBuilder modelBuilder)
        {
            modelBuilder.Entity<UserMember>()
                .HasKey(bc => new {bc.MemberId, bc.UserId});
            modelBuilder.Entity<UserMember>()
                .HasOne(bc => bc.User)
                .WithMany(b => b!.MemberOf)
                .HasForeignKey(bc => bc.UserId);
            modelBuilder.Entity<UserMember>()
                .HasOne(bc => bc.Member)
                .WithMany(c => c!.Members)
                .HasForeignKey(bc => bc.MemberId);

            modelBuilder.Entity<Node>()
                .HasMany(c => c.Children)
                .WithOne(e => e.Parent!)
                .HasForeignKey(bc => bc.ParentId);
        }
    }
}