58 lines
1.9 KiB
C#
58 lines
1.9 KiB
C#
using System.Text;
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using DotBased.Monads;
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namespace Manager.YouTube.Interpreter;
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public class JavaScriptEngineManager
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{
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private readonly PlayerEngineCollection _engines = [];
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public async Task<Result<PlayerEngine>> GetPlayerEngine(string playerUrl)
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{
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if (string.IsNullOrEmpty(playerUrl))
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{
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return ResultError.Fail("player url is empty or null!");
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}
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var version = GetScriptVersion(playerUrl);
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if (_engines.TryGetValue(version, out var engine))
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{
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return engine;
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}
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var playerJsSourceResult = await DownloadPlayerScriptAsync(playerUrl);
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if (!playerJsSourceResult.IsSuccess)
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{
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return playerJsSourceResult.Error ?? ResultError.Fail("Download player script failed!");
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}
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return new PlayerEngine(version, playerJsSourceResult.Value);
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}
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private static string GetScriptVersion(string relativePlayerUrl)
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{
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var split = relativePlayerUrl.Split('/', StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries);
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var v = split[2];
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var lang = split[4];
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return $"{v}-{lang}";
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}
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private static async Task<Result<string>> DownloadPlayerScriptAsync(string relativeUrl, YouTubeClient? client = null)
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{
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var downloadRequest = new HttpRequestMessage(HttpMethod.Get, new Uri($"{NetworkService.Origin}/{relativeUrl}"));
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var downloadResponse = await NetworkService.DownloadBytesAsync(downloadRequest, client);
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if (!downloadResponse.IsSuccess)
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{
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return downloadResponse.Error ?? ResultError.Fail($"Failed to download script from url: {relativeUrl}");
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}
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var playerJs = Encoding.UTF8.GetString(downloadResponse.Value.Data);
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if (string.IsNullOrWhiteSpace(playerJs))
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{
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return ResultError.Fail("Script value is empty!");
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}
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return playerJs;
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}
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} |