133 lines
4.4 KiB
C#
133 lines
4.4 KiB
C#
using System.Net.Http;
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using System.Net.Http.Json;
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using System.Text.Json;
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using ytLive.Models;
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namespace ytLive.Services;
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/// <summary>
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/// Manages YouTube live stream lifecycle — create broadcasts,
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/// bind stream keys, monitor health.
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/// </summary>
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public class YouTubeStreamService
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{
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private readonly YouTubeAuthService _auth;
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private readonly HttpClient _http;
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private const string ApiBase = "https://www.googleapis.com/youtube/v3";
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public YouTubeStreamService(YouTubeAuthService auth, HttpClient? http = null)
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{
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_auth = auth;
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_http = http ?? new HttpClient();
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}
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private async Task<bool> EnsureToken()
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{
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if (_auth.CurrentChannel == null) return false;
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if (_auth.CurrentChannel.TokenExpiry <= DateTime.UtcNow.AddMinutes(5))
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return await _auth.RefreshToken();
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return true;
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}
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public async Task<string?> CreateBroadcast(string title, string description, DateTime scheduledStartTime)
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{
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if (!await EnsureToken()) return null;
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var broadcast = new
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{
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snippet = new
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{
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title,
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description,
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scheduledStartTime = scheduledStartTime.ToString("o"),
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categoryId = "22" // People & Blogs
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},
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status = new
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{
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// Private-only by enforcement (ship step 7) — the Go Live dialog
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// is locked to Private and the service refuses anything else.
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privacyStatus = "private",
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selfDeclaredMadeForKids = false
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},
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contentDetails = new
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{
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enableAutoStart = true,
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enableAutoStop = true
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}
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};
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_http.DefaultRequestHeaders.Authorization = new("Bearer", _auth.CurrentChannel!.AccessToken);
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var response = await _http.PostAsJsonAsync(
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$"{ApiBase}/liveBroadcasts?part=snippet,status,contentDetails", broadcast);
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if (!response.IsSuccessStatusCode) return null;
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var json = await response.Content.ReadAsStringAsync();
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var data = JsonSerializer.Deserialize<JsonElement>(json);
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return data.GetProperty("id").GetString();
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}
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public async Task<string?> BindStream(string broadcastId, string streamKey)
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{
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if (!await EnsureToken()) return null;
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// Create stream resource
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var stream = new
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{
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snippet = new { title = $"stream-{broadcastId}" },
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contentDetails = new
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{
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ingestionType = "rtmp",
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frameRate = "60fps",
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resolution = "1080p"
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}
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};
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_http.DefaultRequestHeaders.Authorization = new("Bearer", _auth.CurrentChannel!.AccessToken);
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var response = await _http.PostAsJsonAsync(
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$"{ApiBase}/liveStreams?part=snippet,contentDetails", stream);
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if (!response.IsSuccessStatusCode) return null;
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var json = await response.Content.ReadAsStringAsync();
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var data = JsonSerializer.Deserialize<JsonElement>(json);
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var streamId = data.GetProperty("id").GetString();
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// Bind stream to broadcast
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var bindResponse = await _http.PutAsJsonAsync(
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$"{ApiBase}/liveBroadcasts?part=id,contentDetails&id={broadcastId}",
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new { contentDetails = new { streamId } });
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return bindResponse.IsSuccessStatusCode ? streamId : null;
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}
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public async Task<StreamHealth?> GetStreamHealth(string broadcastId)
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{
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if (!await EnsureToken()) return null;
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_http.DefaultRequestHeaders.Authorization = new("Bearer", _auth.CurrentChannel!.AccessToken);
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var response = await _http.GetAsync(
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$"{ApiBase}/liveBroadcasts?part=contentDetails,status&id={broadcastId}");
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if (!response.IsSuccessStatusCode) return null;
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var json = await response.Content.ReadAsStringAsync();
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var data = JsonSerializer.Deserialize<JsonElement>(json);
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var items = data.GetProperty("items");
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if (items.GetArrayLength() == 0) return null;
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var status = items[0].GetProperty("status").GetProperty("lifeCycleStatus").GetString();
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return new StreamHealth
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{
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HealthStatus = status switch
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{
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"live" => "good",
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"ready" => "ok",
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"created" => "ok",
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_ => "bad"
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},
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HealthMessage = status
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};
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}
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}
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