1 files changed, 59 insertions, 0 deletions
diff --git a/Emby.Naming/Audio/ExternalAudioFilePathParser.cs b/Emby.Naming/Audio/ExternalAudioFilePathParser.cs
new file mode 100644
index 000000000..ab5af9fc6
--- /dev/null
+++ b/Emby.Naming/Audio/ExternalAudioFilePathParser.cs
@@ -0,0 +1,59 @@
+using System;
+using System.IO;
+using System.Linq;
+using Emby.Naming.Common;
+using Jellyfin.Extensions;
+
+namespace Emby.Naming.Audio
+{
+    /// <summary>
+    /// External Audio Parser class.
+    /// </summary>
+    public class ExternalAudioFilePathParser
+    {
+        private readonly NamingOptions _options;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="ExternalAudioFilePathParser"/> class.
+        /// </summary>
+        /// <param name="options"><see cref="NamingOptions"/> object containing AudioFileExtensions, ExternalAudioDefaultFlags, ExternalAudioForcedFlags and ExternalAudioFlagDelimiters.</param>
+        public ExternalAudioFilePathParser(NamingOptions options)
+        {
+            _options = options;
+        }
+
+        /// <summary>
+        /// Parse file to determine if it is a ExternalAudio and <see cref="ExternalAudioFileInfo"/>.
+        /// </summary>
+        /// <param name="path">Path to file.</param>
+        /// <returns>Returns null or <see cref="ExternalAudioFileInfo"/> object if parsing is successful.</returns>
+        public ExternalAudioFileInfo? ParseFile(string path)
+        {
+            if (path.Length == 0)
+            {
+                return null;
+            }
+
+            var extension = Path.GetExtension(path);
+            if (!_options.AudioFileExtensions.Contains(extension, StringComparison.OrdinalIgnoreCase))
+            {
+                return null;
+            }
+
+            var flags = GetFileFlags(path);
+            var info = new ExternalAudioFileInfo(
+                path,
+                _options.ExternalAudioDefaultFlags.Any(i => flags.Contains(i, StringComparison.OrdinalIgnoreCase)),
+                _options.ExternalAudioForcedFlags.Any(i => flags.Contains(i, StringComparison.OrdinalIgnoreCase)));
+
+            return info;
+        }
+
+        private string[] GetFileFlags(string path)
+        {
+            var file = Path.GetFileNameWithoutExtension(path);
+
+            return file.Split(_options.ExternalAudioFlagDelimiters, StringSplitOptions.RemoveEmptyEntries);
+        }
+    }
+}