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1 files changed, 90 insertions, 0 deletions

diff --git a/Jellyfin.Api/Helpers/RequestHelpers.cs b/Jellyfin.Api/Helpers/RequestHelpers.cs
new file mode 100644
index 000000000..b9d11dfef
--- /dev/null
+++ b/Jellyfin.Api/Helpers/RequestHelpers.cs
@@ -0,0 +1,90 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using MediaBrowser.Model.Entities;
+using MediaBrowser.Model.Querying;
+using Microsoft.AspNetCore.Http;
+
+namespace Jellyfin.Api.Extensions
+{
+    /// <summary>
+    /// Request Extensions.
+    /// </summary>
+    public static class RequestExtensions
+    {
+        /// <summary>
+        /// Get Order By.
+        /// </summary>
+        /// <param name="sortBy">Sort By. Comma delimited string.</param>
+        /// <param name="requestedSortOrder">Sort Order. Comma delimited string.</param>
+        /// <returns>Order By.</returns>
+        public static ValueTuple<string, SortOrder>[] GetOrderBy(string sortBy, string requestedSortOrder)
+        {
+            var val = sortBy;
+
+            if (string.IsNullOrEmpty(val))
+            {
+                return Array.Empty<ValueTuple<string, SortOrder>>();
+            }
+
+            var vals = val.Split(',');
+            if (string.IsNullOrWhiteSpace(requestedSortOrder))
+            {
+                requestedSortOrder = "Ascending";
+            }
+
+            var sortOrders = requestedSortOrder.Split(',');
+
+            var result = new ValueTuple<string, SortOrder>[vals.Length];
+
+            for (var i = 0; i < vals.Length; i++)
+            {
+                var sortOrderIndex = sortOrders.Length > i ? i : 0;
+
+                var sortOrderValue = sortOrders.Length > sortOrderIndex ? sortOrders[sortOrderIndex] : null;
+                var sortOrder = string.Equals(sortOrderValue, "Descending", StringComparison.OrdinalIgnoreCase)
+                    ? SortOrder.Descending
+                    : SortOrder.Ascending;
+
+                result[i] = new ValueTuple<string, SortOrder>(vals[i], sortOrder);
+            }
+
+            return result;
+        }
+
+        /// <summary>
+        /// Gets the item fields.
+        /// </summary>
+        /// <param name="fields">The fields.</param>
+        /// <returns>IEnumerable{ItemFields}.</returns>
+        public static ItemFields[] GetItemFields(string fields)
+        {
+            if (string.IsNullOrEmpty(fields))
+            {
+                return Array.Empty<ItemFields>();
+            }
+
+            return fields.Split(',').Select(v =>
+            {
+                if (Enum.TryParse(v, true, out ItemFields value))
+                {
+                    return (ItemFields?)value;
+                }
+
+                return null;
+            }).Where(i => i.HasValue).Select(i => i.Value).ToArray();
+        }
+
+        /// <summary>
+        /// Get parsed filters.
+        /// </summary>
+        /// <param name="filters">The filters.</param>
+        /// <returns>Item filters.</returns>
+        public static IEnumerable<ItemFilter> GetFilters(string filters)
+        {
+            return string.IsNullOrEmpty(filters)
+                ? Array.Empty<ItemFilter>()
+                : filters.Split(',').Select(v => Enum.Parse<ItemFilter>(v, true));
+        }
+    }
+}