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

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

@@ -0,0 +1,70 @@
+using System.Collections.Generic;
+using System.Threading;
+using System.Threading.Tasks;
+using Jellyfin.Plugin.SRFPlay.Api.Models;
+
+namespace Jellyfin.Plugin.SRFPlay.Services.Interfaces;
+
+/// <summary>
+/// Interface for managing topic/category data and filtering.
+/// </summary>
+public interface ICategoryService
+{
+    /// <summary>
+    /// Gets all topics for a business unit.
+    /// </summary>
+    /// <param name="businessUnit">The business unit.</param>
+    /// <param name="cancellationToken">The cancellation token.</param>
+    /// <returns>List of topics.</returns>
+    Task<List<PlayV3Topic>> GetTopicsAsync(string businessUnit, CancellationToken cancellationToken = default);
+
+    /// <summary>
+    /// Gets a topic by ID.
+    /// </summary>
+    /// <param name="topicId">The topic ID.</param>
+    /// <param name="businessUnit">The business unit.</param>
+    /// <param name="cancellationToken">The cancellation token.</param>
+    /// <returns>The topic, or null if not found.</returns>
+    Task<PlayV3Topic?> GetTopicByIdAsync(string topicId, string businessUnit, CancellationToken cancellationToken = default);
+
+    /// <summary>
+    /// Filters shows by topic ID.
+    /// </summary>
+    /// <param name="shows">The shows to filter.</param>
+    /// <param name="topicId">The topic ID to filter by.</param>
+    /// <returns>Filtered list of shows.</returns>
+    IReadOnlyList<PlayV3Show> FilterShowsByTopic(IReadOnlyList<PlayV3Show> shows, string topicId);
+
+    /// <summary>
+    /// Groups shows by their topics.
+    /// </summary>
+    /// <param name="shows">The shows to group.</param>
+    /// <returns>Dictionary mapping topic IDs to shows.</returns>
+    IReadOnlyDictionary<string, List<PlayV3Show>> GroupShowsByTopics(IReadOnlyList<PlayV3Show> shows);
+
+    /// <summary>
+    /// Gets shows for a specific topic, sorted by number of episodes.
+    /// </summary>
+    /// <param name="topicId">The topic ID.</param>
+    /// <param name="businessUnit">The business unit.</param>
+    /// <param name="maxResults">Maximum number of results to return.</param>
+    /// <param name="cancellationToken">The cancellation token.</param>
+    /// <returns>List of shows for the topic.</returns>
+    Task<List<PlayV3Show>> GetShowsByTopicAsync(
+        string topicId,
+        string businessUnit,
+        int maxResults = 50,
+        CancellationToken cancellationToken = default);
+
+    /// <summary>
+    /// Gets video count for each topic.
+    /// </summary>
+    /// <param name="shows">The shows to analyze.</param>
+    /// <returns>Dictionary mapping topic IDs to video counts.</returns>
+    IReadOnlyDictionary<string, int> GetVideoCountByTopic(IReadOnlyList<PlayV3Show> shows);
+
+    /// <summary>
+    /// Clears the topics cache.
+    /// </summary>
+    void ClearCache();
+}