Case-sensitive rename operation (2/2)

Code/Media/GetFrameCountCached.cs

@@ -0,0 +1,62 @@
+using System;
+using System.Collections.Generic;
+using System.Drawing;
+using System.Threading.Tasks;
+using Flowframes.Data;
+using Flowframes.IO;
+
+namespace Flowframes.Media
+{
+    class GetFrameCountCached
+    {
+        public static Dictionary<PseudoUniqueFile, int> cache = new Dictionary<PseudoUniqueFile, int>();
+
+        public static async Task<int> GetFrameCountAsync(string path)
+        {
+            Logger.Log($"Getting frame count ({path})", true);
+
+            long filesize = IoUtils.GetFilesize(path);
+            PseudoUniqueFile hash = new PseudoUniqueFile(path, filesize);
+
+            if (filesize > 0 && CacheContains(hash))
+            {
+                Logger.Log($"Cache contains this hash, using cached value.", true);
+                return GetFromCache(hash);
+            }
+            else
+            {
+                Logger.Log($"Hash not cached, reading frame count.", true);
+            }
+
+            int frameCount;
+
+            if (IoUtils.IsPathDirectory(path))
+                frameCount = IoUtils.GetAmountOfFiles(path, false);
+            else
+                frameCount = await FfmpegCommands.GetFrameCountAsync(path);
+
+            Logger.Log($"Adding hash with value {frameCount} to cache.", true);
+            cache.Add(hash, frameCount);
+
+            return frameCount;
+        }
+
+        private static bool CacheContains (PseudoUniqueFile hash)
+        {
+            foreach(KeyValuePair<PseudoUniqueFile, int> entry in cache)
+                if (entry.Key.path == hash.path && entry.Key.filesize == hash.filesize)
+                    return true;
+
+            return false;
+        }
+
+        private static int GetFromCache(PseudoUniqueFile hash)
+        {
+            foreach (KeyValuePair<PseudoUniqueFile, int> entry in cache)
+                if (entry.Key.path == hash.path && entry.Key.filesize == hash.filesize)
+                    return entry.Value;
+
+            return 0;
+        }
+    }
+}