refactor to unify data fetching and define abstract API for re-use

Jellyfin.Plugin.SRFPlay/Services/Interfaces/IStreamProxyService.cs

@@ -0,0 +1,56 @@
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace Jellyfin.Plugin.SRFPlay.Services.Interfaces;
+
+/// <summary>
+/// Interface for proxying SRF Play streams and managing authentication.
+/// </summary>
+public interface IStreamProxyService
+{
+    /// <summary>
+    /// Registers a stream for proxying.
+    /// </summary>
+    /// <param name="itemId">The item ID.</param>
+    /// <param name="authenticatedUrl">The authenticated stream URL.</param>
+    /// <param name="urn">The SRF URN for this content (used for re-fetching fresh URLs).</param>
+    /// <param name="isLiveStream">Whether this is a livestream (livestreams always fetch fresh URLs).</param>
+    void RegisterStream(string itemId, string authenticatedUrl, string? urn = null, bool isLiveStream = false);
+
+    /// <summary>
+    /// Gets stream metadata for an item (URN and isLiveStream flag).
+    /// </summary>
+    /// <param name="itemId">The item ID.</param>
+    /// <returns>A tuple of (URN, IsLiveStream), or null if not found.</returns>
+    (string? Urn, bool IsLiveStream)? GetStreamMetadata(string itemId);
+
+    /// <summary>
+    /// Gets the authenticated URL for an item.
+    /// </summary>
+    /// <param name="itemId">The item ID.</param>
+    /// <returns>The authenticated URL, or null if not found or expired.</returns>
+    string? GetAuthenticatedUrl(string itemId);
+
+    /// <summary>
+    /// Fetches and rewrites an HLS manifest to use proxy URLs.
+    /// </summary>
+    /// <param name="itemId">The item ID.</param>
+    /// <param name="baseProxyUrl">The base proxy URL.</param>
+    /// <param name="cancellationToken">Cancellation token.</param>
+    /// <returns>The rewritten manifest content.</returns>
+    Task<string?> GetRewrittenManifestAsync(string itemId, string baseProxyUrl, CancellationToken cancellationToken = default);
+
+    /// <summary>
+    /// Fetches a segment from the original source.
+    /// </summary>
+    /// <param name="itemId">The item ID.</param>
+    /// <param name="segmentPath">The segment path.</param>
+    /// <param name="cancellationToken">Cancellation token.</param>
+    /// <returns>The segment content as bytes.</returns>
+    Task<byte[]?> GetSegmentAsync(string itemId, string segmentPath, CancellationToken cancellationToken = default);
+
+    /// <summary>
+    /// Cleans up old and expired stream mappings.
+    /// </summary>
+    void CleanupOldMappings();
+}