MembershipService.cs

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Security.Claims;
using ScientificReport.BLL.Interfaces;
using ScientificReport.BLL.Utils;
using ScientificReport.DAL.DbContext;
using ScientificReport.DAL.Entities;
using ScientificReport.DAL.Repositories;
using ScientificReport.DTO.Models.Membership;

namespace ScientificReport.BLL.Services
{
    public class MembershipService : IMembershipService
    {
        private readonly MembershipRepository _membershipRepository;
        private readonly UserProfileRepository _userProfileRepository;
        private readonly DepartmentRepository _departmentRepository;

        public MembershipService(ScientificReportDbContext context)
        {
            _membershipRepository = new MembershipRepository(context);
            _userProfileRepository = new UserProfileRepository(context);
            _departmentRepository = new DepartmentRepository(context);
        }

        public virtual IEnumerable<Membership> GetAll()
        {
            return _membershipRepository.All();
        }

        public virtual IEnumerable<Membership> GetAllWhere(Func<Membership, bool> predicate)
        {
            return GetAll().Where(predicate);
        }

        public virtual IEnumerable<Membership> GetItemsByRole(ClaimsPrincipal userClaims)
        {
            IEnumerable<Membership> items;
            if (UserHelpers.IsAdmin(userClaims))
            {
                items = _membershipRepository.All();
            }
            else if (UserHelpers.IsHeadOfDepartment(userClaims))
            {
                var department = _departmentRepository.Get(r => r.Head.UserName == userClaims.Identity.Name);
                items = _membershipRepository.AllWhere(m => department.Staff.Contains(m.User));
            }
            else
            {
                var user = _userProfileRepository.Get(u => u.UserName == userClaims.Identity.Name);
                items = _membershipRepository.AllWhere(m => m.User.Id == user.Id);
            }

            return items;
        }

        public virtual IEnumerable<Membership> GetPageByRole(int page, int count, ClaimsPrincipal userClaims)
        {
            return GetItemsByRole(userClaims).Skip((page - 1) * count).Take(count).ToList();
        }

        public virtual int GetCountByRole(ClaimsPrincipal userClaims)
        {
            return GetItemsByRole(userClaims).Count();
        }

        public virtual Membership GetById(Guid id)
        {
            return _membershipRepository.Get(id);
        }

        public virtual Membership Get(Func<Membership, bool> predicate)
        {
            return _membershipRepository.Get(predicate);
        }

        public virtual void CreateItem(MembershipModel model)
        {
            _membershipRepository.Create(new Membership
            {
                Type = model.MemberOf,
                MembershipInfo = model.MembershipInfo,
                User = model.User
            });
        }

        public virtual void UpdateItem(MembershipEditModel model)
        {
            var membership = GetById(model.Id);
            if (membership == null)
            {
                return;
            }
            
            membership.Type = model.MemberOf;
            membership.MembershipInfo = model.MembershipInfo;
            _membershipRepository.Update(membership);
        }

        public virtual void DeleteById(Guid id)
        {
            _membershipRepository.Delete(id);
        }

        public virtual bool Exists(Guid id)
        {
            return _membershipRepository.Get(id) != null;
        }
    }
}