webmusic/Pages/Log.cs

using System.Net;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Text;
using System.Text.Json;
using Microsoft.AspNetCore.Mvc;

namespace webmusic.Pages;

[ApiController, Route("/log")]
public class Log : Controller {
	public const bool   StatisticsEnabled = true;
	public const string StatisticsUser    = "zotan";

	public const     string NowPlayingUrl    = "https://zotan.pw/np";
	private const    string StatisticsUrl    = "https://zotan.pw/np/log";
	private const    string StatisticsSource = "music.ztn.sh";
	private readonly string _statisticsToken = System.IO.File.Exists(".bearer_token") ? System.IO.File.ReadAllLines(".bearer_token")[0] : "";

	[HttpGet]
	public string Get(string artist, string album, string url) {
		if (StatisticsEnabled && Request.Headers["Remote-User"].Equals(StatisticsUser)) {
			var res = MakeRestRequest(new LogPlaybackRequest { Artist = artist, Title = album, Link = url, Source = StatisticsSource });
			Response.StatusCode = (int)res;

			return res switch {
				HttpStatusCode.Created   => "Logged",
				HttpStatusCode.Accepted  => "Skipped",
				HttpStatusCode.Forbidden => "Invalid token",
				_                        => $"Error {Response.StatusCode} \"{res}\" occured"
			};
		}

		Response.StatusCode = 403;
		return null;
	}

	private HttpStatusCode MakeRestRequest(LogPlaybackRequest rq) {
		using var client = new HttpClient();
		client.DefaultRequestHeaders.Authorization = AuthenticationHeaderValue.Parse(_statisticsToken);

		var json     = JsonSerializer.Serialize(rq);
		var data     = new StringContent(json, Encoding.UTF8, "application/json");
		var response = client.PostAsync(StatisticsUrl, data).Result;
		return response.StatusCode;
	}

	private class LogPlaybackRequest {
		public string Artist { get; set; }
		public string Title  { get; set; }
		public string Source { get; set; }
		public string Link   { get; set; }
	}
}