ReportThesisService.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.Entities.UserProfile;
using ScientificReport.DAL.Repositories;
using ScientificReport.DTO.Models.ReportThesis;

namespace ScientificReport.BLL.Services
{
    public class ReportThesisService : IReportThesisService
    {
        private readonly ReportThesisRepository _reportThesisRepository;
        private readonly UserProfileRepository _userProfileRepository;
        private readonly DepartmentRepository _departmentRepository;

        public ReportThesisService(ScientificReportDbContext context)
        {
            _reportThesisRepository = new ReportThesisRepository(context);
            _userProfileRepository = new UserProfileRepository(context);
            _departmentRepository = new DepartmentRepository(context);
        }

        public virtual IEnumerable<ReportThesis> GetAll()
        {
            return _reportThesisRepository.All();
        }

        public virtual IEnumerable<ReportThesis> GetAllWhere(Func<ReportThesis, bool> predicate)
        {
            return GetAll().Where(predicate);
        }
        
        public virtual IEnumerable<ReportThesis> GetItemsByRole(ClaimsPrincipal userClaims)
        {
            IEnumerable<ReportThesis> items;
            if (UserHelpers.IsAdmin(userClaims))
            {
                items = _reportThesisRepository.All();
            }
            else if (UserHelpers.IsHeadOfDepartment(userClaims))
            {
                var department = _departmentRepository.Get(r => r.Head.UserName == userClaims.Identity.Name);
                items = _reportThesisRepository.AllWhere(a => GetAuthors(a.Id).Any(u => department.Staff.Contains(u)));
            }
            else
            {
                var user = _userProfileRepository.Get(u => u.UserName == userClaims.Identity.Name);
                items = _reportThesisRepository.AllWhere(a => GetAuthors(a.Id).Any(u => u.Id == user.Id));
            }

            return items;
        }
        
        public virtual IEnumerable<ReportThesis> 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 ReportThesis GetById(Guid id)
        {
            return _reportThesisRepository.Get(id);
        }

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

        public virtual void CreateItem(ReportThesisModel model)
        {
            _reportThesisRepository.Create(new ReportThesis
            {
                Thesis = model.Thesis,
                Conference = model.Conference
            });
        }

        public virtual void UpdateItem(ReportThesisEdit model)
        {
            var reportThesis = _reportThesisRepository.Get(model.Id);
            if (reportThesis == null)
            {
                return;
            }

            reportThesis.Thesis = model.Thesis;
            reportThesis.Conference = model.Conference;
            _reportThesisRepository.Update(reportThesis);
        }

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

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

        public virtual IEnumerable<UserProfile> GetAuthors(Guid id)
        {
            var reportThesis = _reportThesisRepository.Get(id);
            IEnumerable<UserProfile> authors = null;
            if (reportThesis != null)
            {
                authors = reportThesis.UserProfilesReportTheses.Select(u => u.UserProfile);
            }

            return authors;
        }
        
        public void AddAuthor(Guid id, Guid authorId)
        {
            var reportThesis = _reportThesisRepository.Get(id);
            var author = _userProfileRepository.Get(authorId);
            if (reportThesis.UserProfilesReportTheses.Any(u => u.UserProfile.Id == authorId))
            {
                return;
            }

            reportThesis.UserProfilesReportTheses.Add(new UserProfilesReportThesis
            {
                ReportThesis = reportThesis,
                UserProfile = author
            });
            _reportThesisRepository.Update(reportThesis);
        }

        public void RemoveAuthor(Guid id, Guid authorId)
        {
            var reportThesis = _reportThesisRepository.Get(id);
            if (reportThesis.UserProfilesReportTheses.All(u => u.UserProfile.Id != authorId))
            {
                return;
            }

            reportThesis.UserProfilesReportTheses = reportThesis.UserProfilesReportTheses
                .Where(u => u.UserProfile.Id != authorId).ToList();
            _reportThesisRepository.Update(reportThesis);
        }
    }
}