roadie/RoadieApi/Services/CollectionService.cs

using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Logging;
using Roadie.Library.Caching;
using Roadie.Library.Configuration;
using Roadie.Library.Encoding;
using Roadie.Library.Enums;
using Roadie.Library.Models;
using Roadie.Library.Models.Collections;
using Roadie.Library.Models.Pagination;
using Roadie.Library.Models.Users;
using Roadie.Library.Utility;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Linq.Dynamic.Core;
using System.Threading.Tasks;
using data = Roadie.Library.Data;

namespace Roadie.Api.Services
{
    public class CollectionService : ServiceBase, ICollectionService
    {
        public CollectionService(IRoadieSettings configuration,
                             IHttpEncoder httpEncoder,
                             IHttpContext httpContext,
                             data.IRoadieDbContext dbContext,
                             ICacheManager cacheManager,
                             ILogger<CollectionService> logger)
            : base(configuration, httpEncoder, dbContext, cacheManager, logger, httpContext)
        {
        }

        public async Task<Library.Models.Pagination.PagedResult<CollectionList>> List(User roadieUser, PagedRequest request, bool? doRandomize = false, Guid? releaseId = null, Guid? artistId = null)
        {
            var sw = new Stopwatch();
            sw.Start();
            IQueryable<data.Collection> collections = null;
            if(artistId.HasValue)
            {
                var sql = @"select DISTINCT c.*
                            from `collectionrelease` cr
                            join `collection` c on c.id = cr.collectionId
                            join `release` r on r.id = cr.releaseId
                            join `artist` a on r.artistId = a.id
                            where a.roadieId = {0}";

                collections = this.DbContext.Collections.FromSql(sql, artistId);
            }
            else if(releaseId.HasValue)
            {
                var sql = @"select DISTINCT c.*
                            from `collectionrelease` cr
                            join `collection` c on c.id = cr.collectionId
                            join `release` r on r.id = cr.releaseId
                            where r.roadieId = {0}";

                collections = this.DbContext.Collections.FromSql(sql, releaseId);
            }
            else
            {
                collections = this.DbContext.Collections;
            }
            var result = (from c in collections
                          where (request.FilterValue.Length == 0 || (request.FilterValue.Length > 0 && c.Name.Contains(request.Filter)))
                          select new CollectionList
                          {
                              DatabaseId = c.Id,
                              Collection = new DataToken
                              {
                                  Text = c.Name,
                                  Value = c.RoadieId.ToString()
                              },
                              Id = c.RoadieId,
                              CollectionCount = c.CollectionCount,
                              CollectionType = (c.CollectionType ?? CollectionType.Unknown).ToString(),
                              CollectionFoundCount = (from crc in this.DbContext.CollectionReleases
                                                      where crc.CollectionId == c.Id
                                                      select crc.Id).Count(),
                              CreatedDate = c.CreatedDate,
                              LastUpdated = c.LastUpdated,
                              Thumbnail = MakeCollectionThumbnailImage(c.RoadieId)
                          });
            var sortBy = string.IsNullOrEmpty(request.Sort) ? request.OrderValue(new Dictionary<string, string> { { "Collection.Text", "ASC" } }) : request.OrderValue(null);
            var rowCount = result.Count();
            var rows = result.OrderBy(sortBy).Skip(request.SkipValue).Take(request.LimitValue).ToArray();
            sw.Stop();
            return new Library.Models.Pagination.PagedResult<CollectionList>
            {
                TotalCount = rowCount,
                CurrentPage = request.PageValue,
                TotalPages = (int)Math.Ceiling((double)rowCount / request.LimitValue),
                OperationTime = sw.ElapsedMilliseconds,
                Rows = rows
            };
        }
    }
}