aswi20220x00-gitlab/Backend/Core/Services/AnnotationService/AnnotationServiceEF.cs @ 8b2a2c15

using Core.Contexts;
using Core.Entities;
using Models.Annotations;
using Models.Enums;
using Serilog;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Microsoft.EntityFrameworkCore;

namespace Core.Services.AnnotationService
{
    public class AnnotationServiceEF : IAnnotationService
    {
        private readonly DatabaseContext context;
        private readonly ILogger logger;

        public AnnotationServiceEF(DatabaseContext context, ILogger logger)
        {
            this.context = context;
            this.logger = logger;
        }

        public void CreateDocumentAnnotations(AnnotationsAddRequest request, Guid clientUserId)
        {
            User addingUser = context.Users.Single(u => u.Id == clientUserId);

            // Check the documents exist
            var documents = context.Documents.Where(d => request.DocumentIdList.Contains(d.Id)).ToList();
            if (documents.Count() != request.DocumentIdList.Count)
            {
                logger.Information($"Received a non-existent Document ID when assigning documents to users");
                throw new InvalidOperationException($"{request.DocumentIdList.Count - documents.Count()} of the received documents do not exist");
            }

            var users = context.Users.Where(u => request.UserIdList.Contains(u.Id)).ToList();
            foreach (var user in users)
            {
                var userAnnotatedDocuments = context.Annotations.Where(a => a.User == user).Select(a => a.Document).ToList();
                foreach (var doc in documents)
                {
                    if (userAnnotatedDocuments.Contains(doc))
                    {
                        logger.Information($"User {user.Username} has already been assigned the document {doc.Id}, ignoring");
                        continue;
                    }

                    context.Annotations.Add(new Annotation()
                    {
                        User = user,
                        UserAssigned = addingUser,
                        DateAssigned = DateTime.Now,
                        DateLastChanged = DateTime.Now,
                        Document = doc,
                        State = EState.NEW,
                        Note = ""
                    });
                }
            }

            context.SaveChanges();
        }

        public AnnotationListResponse GetUserAnnotations(Guid userId)
        {
            var annotations = context.Annotations.Where(a => a.User.Id == userId).Include(a => a.Document).ToList();
            var documentIds = annotations.Select(a => a.Document.Id).ToList();
            var documents = context.Documents.Where(d => documentIds.Contains(d.Id));
            var infos = new List<AnnotationListInfo>();

            var annotationsDocuments = annotations.Zip(documents, (a, d) => new { Annotation = a, Document = d });
            foreach (var ad in annotationsDocuments)
            {
                infos.Add(new AnnotationListInfo()
                {
                    AnnotationId = ad.Annotation.Id,
                    DocumentName = ad.Document.Name,
                    State = ad.Annotation.State
                });
            }

            return new AnnotationListResponse()
            {
                Annotations = infos
            };
        }
    }
}