Add PaginatedQuery abstract class, change startIndex to skip

Jellyfin.Api/Controllers/ActivityLogController.cs

@@ -47,7 +47,7 @@ namespace Jellyfin.Api.Controllers
         {
             return await _activityManager.GetPagedResultAsync(new ActivityLogQuery
             {
-                StartIndex = startIndex,
+                Skip = startIndex,
                 Limit = limit,
                 MinDate = minDate,
                 HasUserId = hasUserId

Jellyfin.Data/Queries/ActivityLogQuery.cs

@@ -5,18 +5,8 @@ namespace Jellyfin.Data.Queries
     /// <summary>
     /// A class representing a query to the activity logs.
     /// </summary>
-    public class ActivityLogQuery
+    public class ActivityLogQuery : PaginatedQuery
     {
-        /// <summary>
-        /// Gets or sets the index to start at.
-        /// </summary>
-        public int? StartIndex { get; set; }
-
-        /// <summary>
-        /// Gets or sets the maximum number of items to include.
-        /// </summary>
-        public int? Limit { get; set; }
-
         /// <summary>
         /// Gets or sets a value indicating whether to take entries with a user id.
         /// </summary>

Jellyfin.Data/Queries/PaginatedQuery.cs

@@ -0,0 +1,18 @@
+namespace Jellyfin.Data.Queries
+{
+    /// <summary>
+    /// An abstract class for paginated queries.
+    /// </summary>
+    public abstract class PaginatedQuery
+    {
+        /// <summary>
+        /// Gets or sets the index to start at.
+        /// </summary>
+        public int? Skip { get; set; }
+
+        /// <summary>
+        /// Gets or sets the maximum number of items to include.
+        /// </summary>
+        public int? Limit { get; set; }
+    }
+}

Jellyfin.Server.Implementations/Activity/ActivityManager.cs

@@ -62,7 +62,7 @@ namespace Jellyfin.Server.Implementations.Activity
             return new QueryResult<ActivityLogEntry>
             {
                 Items = await entries
-                    .Skip(query.StartIndex ?? 0)
+                    .Skip(query.Skip ?? 0)
                     .Take(query.Limit ?? 100)
                     .AsAsyncEnumerable()
                     .Select(ConvertToOldModel)