aswi20220x00-gitlab/Backend/Core/Services/AnnotationService/AnnotationServiceEF.cs @ 09b22f6f

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;
using AutoMapper;
using Models.Tags;

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

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

        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
            };
        }

        public AnnotationInfo GetAnnotation(Guid annotationId, Guid userId, ERole userRole)
        {
            var a = context.Annotations.Where(a => a.Id == annotationId).Include(a => a.User).Include(a => a.Document).Include(a => a.Document.Content).ToList();
            if (a.Count == 0)
            {
                throw new ArgumentException($"Annotation {annotationId} does not exist");
            }
            Annotation annotation = a.ElementAt(0);

            if (userRole < ERole.ADMINISTRATOR)
            {
                if (annotation.User.Id != userId)
                {
                    throw new UnauthorizedAccessException($"User {userId} does not have assigned annotation {annotationId}");
                }
            }

            var documentContent = context.Documents.Where(d => d.Id == annotation.Document.Id).Select(d => d.Content).ToList()[0];

            // We probably cannot use AutoMapper since we are dealing with too many different entities
            AnnotationInfo annotationInfo = new()
            {
                DocumentText = documentContent.Content,
                Note = annotation.Note,
                State = annotation.State,
                Type = IsHtml(documentContent.Content) ? EDocumentType.HTML : EDocumentType.TEXT
            };

            var tags = context.AnnotationTags.Where(at => at.Annotation.Id == annotationId).Include(at => at.Tag).Include(at => at.SubTag).Include(at => at.Tag.Category).ToList();
            foreach (var tag in tags)
            {
                var tagInstance = mapper.Map<TagInstanceInfo>(tag);
                annotationInfo.TagInstances.Add(tagInstance);
            }

            return annotationInfo;
        }

        // TODO temporary
        private bool IsHtml(string text)
        {
            return text.Contains("<!DOCTYPE html>");
        }
    }
}