NemAn/gRPCServer/Services/TrackService.cs

using Grpc.Core;
using GrpcShared;
using GrpcShared.DTO.Search;
using GrpcShared.DTO.Track.MultipleTrack;
using GrpcShared.DTO.Track.SingleTrack;
using GrpcShared.Interfaces;
using Microsoft.Net.Http.Headers;
using Newtonsoft.Json;
using System.Text;
using System.Text.Json;
using System.Web;

namespace SpotifyService.Services
{
    public class TrackService : ITrackService
    {
        private readonly IHttpClientFactory _httpClientFactory;


        public TrackService(IHttpClientFactory httpClientFactory)
        {
            _httpClientFactory = httpClientFactory;
        }


        public async Task<SearchResponse> ListSearchAsync(SearchRequest request)
        {
            var client = _httpClientFactory.CreateClient("HttpClient");

            client.DefaultRequestHeaders.Add(HeaderNames.Authorization, "Bearer " + request.Token );

            var searchResult = await client.GetAsync($"search?q={request.Query}&type={request.Type}");

            var responses = JsonConvert.DeserializeObject<SearchResponse>(await searchResult.Content.ReadAsStringAsync())!;

            return new SearchResponse
            {
                Tracks = responses!.Tracks
            };


        }

        public async Task<SingleTrackResponse> ListSingleTrackAsync(SingleTrackRequest request)
        {
            var client = _httpClientFactory.CreateClient("HttpClient");

            client.DefaultRequestHeaders.Add(HeaderNames.Authorization, "Bearer " + request.Token);

            var trackResult = await client.GetAsync($"audio-features/{request.Id}");

            var responses = JsonConvert.DeserializeObject<SingleTrackResponse>(await trackResult.Content.ReadAsStringAsync())!;

            return new SingleTrackResponse
            {
                Id = responses!.Id,
                Danceability = responses!.Danceability,
                Key = responses!.Key,
                Loudness = responses!.Loudness,
                Mode = responses!.Mode,
                Speechiness = responses!.Speechiness,
                Acousticness = responses!.Acousticness,
                Instrumentalness = responses!.Instrumentalness,
                Liveness = responses!.Liveness,
                Valence = responses!.Valence,
                Tempo = responses!.Tempo,
                Type = responses!.Type,
                Uri = responses!.Uri,
                TrackHref = responses!.TrackHref,
                AnalysisUrl = responses!.AnalysisUrl,
                DurationMs = responses!.DurationMs,
                TimeSignature = responses!.TimeSignature,
            };
        }
        public async Task<MultipleTrackResponse> ListMultipleTrackAsync(MultipleTrackRequest request)
        {
            var client = _httpClientFactory.CreateClient("HttpClient");

            client.DefaultRequestHeaders.Add(HeaderNames.Authorization, "Bearer " + request.Token);


            bool startingQuestionMarkAdded = false;
            var sb = new StringBuilder();

            var param = new Dictionary<string, List<string>>();
            param["ids"] = request.Ids;

            foreach(var id in param)
            {
                    sb.Append(startingQuestionMarkAdded ? '&' : '?');
                    sb.Append(id.Key);
                    sb.Append('=');

                        foreach(var Xid in id.Value)
                        {
                            sb.Append(Xid);
                            sb.Append("%2C");
                            startingQuestionMarkAdded = true;
                        }
            }
            sb.Length = sb.Length - 3;
            sb.ToString();

            var trackMultipleResult = await client.GetAsync($"audio-features{sb}");

            var responses = JsonConvert.DeserializeObject<MultipleTrackResponse>(await trackMultipleResult.Content.ReadAsStringAsync())!;

            return new MultipleTrackResponse
            {
                AudioFeatures = responses!.AudioFeatures
            };
        }
    }
}