From ebc9782eb5622b6149834d616b7c6954d4887b5d Mon Sep 17 00:00:00 2001
From: "Collin M. Barrett" <collinbarrett@users.noreply.github.com>
Date: Fri, 26 Oct 2018 11:01:08 -0500
Subject: [PATCH] begin caching original file snapshots

ref #464
---
 src/FilterLists.Services/Snapshot/Snapshot.cs | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/src/FilterLists.Services/Snapshot/Snapshot.cs b/src/FilterLists.Services/Snapshot/Snapshot.cs
index d2638407c..7a471bea3 100644
--- a/src/FilterLists.Services/Snapshot/Snapshot.cs
+++ b/src/FilterLists.Services/Snapshot/Snapshot.cs
@@ -211,6 +211,19 @@ private async Task GetLinesFromStream(Stream stream)
                 string line;
                 while ((line = await streamReader.ReadLineAsync()) != null)
                     lines.AddIfNotNullOrEmpty(line.Trim());
+                stream.Position = 0;
+                await SaveOriginalFile(stream);
+            }
+        }
+
+        private async Task SaveOriginalFile(Stream stream)
+        {
+            var fileName = Path.Combine("snapshots", List.Id.ToString(),
+                BitConverter.ToString(SnapEntity.Md5Checksum).Replace("-", "") + ".txt");
+            new FileInfo(fileName).Directory?.Create();
+            using (var fileStream = File.Create(fileName))
+            {
+                await stream.CopyToAsync(fileStream);
             }
         }