spotifyApi(endpoint) {
    return new Promise(resolve => {
      require("https").request({
        hostname: "api.spotify.com",
        path: endpoint,
        headers: {
          "Authorization": `Bearer ${this.client.config.spotifyAccessToken}`
        }
      }, response => {
        let data = "";
        response.on("data", chunk => data += chunk);
        response.on("end", () => resolve(JSON.parse(data)));
      }).end();
    });
  }
  spotifyURI(tag) {
    return new Promise(res => {
      tag = tag.replace(/spotify:|user:/g, "");
      tag = tag.split(":").slice(-2);
      const type = tag[0];
      const id = tag[1];
      this.spotifyApi(`/v1/${type}s/${id}`).then(async response => {
        while (response.tracks.next) {
          const res2 = await this.spotifyApi(response.tracks.next.slice(23));
          response.tracks.items = response.tracks.items.concat(res2.items);
          response.tracks.next = res2.next;

        }
        let Tracks = [];
        if (type === "track") {
          Tracks.push(response);
          Tracks.metadata = {
            type: "track"
          };
        } else {
          // This else statement is actually only considering 'playlist' and 'album' types
          if (type !== "album") response.tracks.items = response.tracks.items.map(i => i.track);
          Tracks = Tracks.concat(response.tracks.items);
          delete response.tracks.items;
        }
        Promise.all(Tracks.map(async track => {
          const results = await this.youtubeAPI.search.list({
            part: "id, snippet",
            q: `${type === "album" ? Tracks.metadata.name : track.artists[0].name} ${track.name}`,
            type: "video",
            safeSearch: "none"
          });
          return track = {
            track: track,
            video: results.data.items[0]
          };
        })).then(async Tracks => {
          let ytDetails = [];
          while (ytDetails.length < Tracks.length) {
            const response = await this.youtubeAPI.videos.list({
              part: "contentDetails",
              id: Tracks.map(i => i.video.id.videoId).slice(ytDetails.length, ytDetails.length + 50).join(",")
            });
            ytDetails = ytDetails.concat(response.data.items);
          }
          ytDetails.forEach(details => Tracks.find(i => i.video.id.videoId === details.id).video.contentDetails = details.contentDetails);
          Tracks.metadata = response;
          res(Tracks);
        });
      });
    });
  }