Helpers.cs

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using System;
using System.Linq;
using ScientificReport.DAL.Entities;
using ScientificReport.DAL.Entities.Publications;
using ScientificReport.DAL.Entities.UserProfile;

namespace ScientificReport.Controllers.Utils
{
    public class Helpers
    {
        public static bool CheckForPersonalPublication(PublicationBase publication, UserProfile user)
        {
            var result = false;
            var publicationType = publication.GetType();
            if (publicationType == typeof(Publication))
            {
                result = ((Publication) publication).UserProfilesPublications.Any(upp => upp.UserProfile.Id == user.Id);
            }
            else if (publicationType == typeof(Article))
            {
                result = ((Article) publication).UserProfilesArticles.Any(upp => upp.Author.Id == user.Id);
            }
            else if (publicationType == typeof(ScientificWork))
            {
                result = ((ScientificWork) publication).UserProfilesScientificWorks.Any(upp => upp.UserProfile.Id == user.Id);
            }

            return result;
        }
        
        public static bool CheckForDepartmentPublication(PublicationBase publication, Department department)
        {
            var result = false;
            var publicationType = publication.GetType();
            if (publicationType == typeof(Publication))
            {
                result = ((Publication) publication).UserProfilesPublications.Any(up => department.Staff.Contains(up.UserProfile));
            }
            else if (publicationType == typeof(Article))
            {
                result = ((Article) publication).UserProfilesArticles.Any(up => department.Staff.Contains(up.Author));
            }
            else if (publicationType == typeof(ScientificWork))
            {
                result = ((ScientificWork) publication).UserProfilesScientificWorks.Any(up => department.Staff.Contains(up.UserProfile));
            }

            return result;
        }
        
        public static bool CheckForPublication(PublicationBase publication, Func<UserProfile, bool> predicate)
        {
            var result = false;
            var publicationType = publication.GetType();
            if (publicationType == typeof(Publication))
            {
                result = ((Publication) publication).UserProfilesPublications.Any(up => predicate(up.UserProfile));
            }
            else if (publicationType == typeof(Article))
            {
                result = ((Article) publication).UserProfilesArticles.Any(up => predicate(up.Author));
            }
            else if (publicationType == typeof(ScientificWork))
            {
                result = ((ScientificWork) publication).UserProfilesScientificWorks.Any(up => predicate(up.UserProfile));
            }

            return result;
        }
    }
}