Initial scaffold: ytLive C# WPF project

- MVVM architecture (Models, ViewModels, Views, Services, Helpers) - Models: Scene, Source, StreamConfig, StreamHealth, YouTubeChannel, ChatMessage - Services: YouTubeAuthService (OAuth2), YouTubeStreamService (broadcasts/stream health), YouTubeChatService (live chat polling) - ViewModels: MainViewModel with scene management, stream controls, chat - MainWindow with dark theme: scene/source panel, preview area, chat panel, status bar - Version roadmap: v0.1 (scenes, RTMP, OAuth2, chat, health) -> 1.0
2026-08-04 09:09:52 -07:00
commit 9103ff1fb7
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+using System.Net.Http;
+using System.Net.Http.Json;
+using System.Text.Json;
+using ytLive.Models;
+
+namespace ytLive.Services;
+
+/// <summary>
+/// Manages YouTube live stream lifecycle — create broadcasts,
+/// bind stream keys, monitor health.
+/// </summary>
+public class YouTubeStreamService
+{
+    private readonly YouTubeAuthService _auth;
+    private readonly HttpClient _http = new();
+    private const string ApiBase = "https://www.googleapis.com/youtube/v3";
+
+    public YouTubeStreamService(YouTubeAuthService auth)
+    {
+        _auth = auth;
+    }
+
+    private async Task<bool> EnsureToken()
+    {
+        if (_auth.CurrentChannel == null) return false;
+        if (_auth.CurrentChannel.TokenExpiry <= DateTime.UtcNow.AddMinutes(5))
+            return await _auth.RefreshToken();
+        return true;
+    }
+
+    public async Task<string?> CreateBroadcast(string title, string description, DateTime scheduledStartTime)
+    {
+        if (!await EnsureToken()) return null;
+
+        var broadcast = new
+        {
+            snippet = new
+            {
+                title,
+                description,
+                scheduledStartTime = scheduledStartTime.ToString("o"),
+                categoryId = "22"  // People & Blogs
+            },
+            status = new
+            {
+                privacyStatus = "public",
+                selfDeclaredMadeForKids = false
+            },
+            contentDetails = new
+            {
+                enableAutoStart = true,
+                enableAutoStop = true
+            }
+        };
+
+        _http.DefaultRequestHeaders.Authorization = new("Bearer", _auth.CurrentChannel!.AccessToken);
+        var response = await _http.PostAsJsonAsync(
+            $"{ApiBase}/liveBroadcasts?part=snippet,status,contentDetails", broadcast);
+
+        if (!response.IsSuccessStatusCode) return null;
+
+        var json = await response.Content.ReadAsStringAsync();
+        var data = JsonSerializer.Deserialize<JsonElement>(json);
+        return data.GetProperty("id").GetString();
+    }
+
+    public async Task<string?> BindStream(string broadcastId, string streamKey)
+    {
+        if (!await EnsureToken()) return null;
+
+        // Create stream resource
+        var stream = new
+        {
+            snippet = new { title = $"stream-{broadcastId}" },
+            contentDetails = new
+            {
+                ingestionType = "rtmp",
+                frameRate = "60fps",
+                resolution = "1080p"
+            }
+        };
+
+        _http.DefaultRequestHeaders.Authorization = new("Bearer", _auth.CurrentChannel!.AccessToken);
+        var response = await _http.PostAsJsonAsync(
+            $"{ApiBase}/liveStreams?part=snippet,contentDetails", stream);
+
+        if (!response.IsSuccessStatusCode) return null;
+
+        var json = await response.Content.ReadAsStringAsync();
+        var data = JsonSerializer.Deserialize<JsonElement>(json);
+        var streamId = data.GetProperty("id").GetString();
+
+        // Bind stream to broadcast
+        var bindResponse = await _http.PutAsJsonAsync(
+            $"{ApiBase}/liveBroadcasts?part=id,contentDetails&id={broadcastId}",
+            new { contentDetails = new { streamId } });
+
+        return bindResponse.IsSuccessStatusCode ? streamId : null;
+    }
+
+    public async Task<StreamHealth?> GetStreamHealth(string broadcastId)
+    {
+        if (!await EnsureToken()) return null;
+
+        _http.DefaultRequestHeaders.Authorization = new("Bearer", _auth.CurrentChannel!.AccessToken);
+        var response = await _http.GetAsync(
+            $"{ApiBase}/liveBroadcasts?part=contentDetails,status&id={broadcastId}");
+
+        if (!response.IsSuccessStatusCode) return null;
+
+        var json = await response.Content.ReadAsStringAsync();
+        var data = JsonSerializer.Deserialize<JsonElement>(json);
+        var items = data.GetProperty("items");
+        if (items.GetArrayLength() == 0) return null;
+
+        var status = items[0].GetProperty("status").GetProperty("lifeCycleStatus").GetString();
+        return new StreamHealth
+        {
+            HealthStatus = status switch
+            {
+                "live" => "good",
+                "ready" => "ok",
+                "created" => "ok",
+                _ => "bad"
+            },
+            HealthMessage = status
+        };
+    }
+}