OppositionService.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.Opposition;

namespace ScientificReport.BLL.Services
{
    public class OppositionService : IOppositionService
    {
        private readonly OppositionRepository _oppositionRepository;
        private readonly DepartmentRepository _departmentRepository;
        private readonly UserProfileRepository _userProfileRepository;

        public OppositionService(ScientificReportDbContext context)
        {
            _oppositionRepository = new OppositionRepository(context);
            _departmentRepository = new DepartmentRepository(context);
            _userProfileRepository = new UserProfileRepository(context);
        }

        public virtual IEnumerable<Opposition> GetAll()
        {
            return _oppositionRepository.All();
        }

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

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

            return items;
        }

        public virtual IEnumerable<Opposition> 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 Opposition GetById(Guid id)
        {
            return _oppositionRepository.Get(id);
        }

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

        public virtual void CreateItem(OppositionModel model)
        {
            _oppositionRepository.Create(new Opposition
            {
                About = model.About,
                Opponent = model.Opponent,
                DateOfOpposition = model.DateOfOpposition
            });
        }

        public virtual void UpdateItem(OppositionEditModel model)
        {
            var opposition = GetById(model.Id);
            if (opposition == null)
            {
                return;
            }
            
            opposition.About = model.About;
            opposition.Opponent = model.Opponent;
            opposition.DateOfOpposition = model.DateOfOpposition;
            _oppositionRepository.Update(opposition);
        }

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

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