From 8d4e2d0c4fb40b044ae1206931a736676f5ea240 Mon Sep 17 00:00:00 2001
From: "Collin M. Barrett" <collinbarrett@users.noreply.github.com>
Date: Thu, 30 Aug 2018 18:29:54 -0500
Subject: [PATCH] snapshot each list only once per week

---
 src/FilterLists.Services/Snapshot/SnapshotService.cs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/FilterLists.Services/Snapshot/SnapshotService.cs b/src/FilterLists.Services/Snapshot/SnapshotService.cs
index 539b1f971..2cf91339f 100644
--- a/src/FilterLists.Services/Snapshot/SnapshotService.cs
+++ b/src/FilterLists.Services/Snapshot/SnapshotService.cs
@@ -39,7 +39,11 @@ private async Task CleanupFailedSnapshots()
         private async Task<IEnumerable<FilterListViewUrlDto>> GetListsToCapture(int batchSize) =>
             await DbContext
                   .FilterLists
-                  .Where(l => !(l.ViewUrl.StartsWith(WaybackService.WaybackMachineUrlPrefix) &&
+                  .Where(l => l.Snapshots
+                               .OrderByDescending(s => s.CreatedDateUtc)
+                               .Select(s => s.CreatedDateUtc)
+                               .FirstOrDefault() <= DateTime.Now.AddDays(-7) &&
+                              !(l.ViewUrl.StartsWith(WaybackService.WaybackMachineUrlPrefix) &&
                                 l.Snapshots.Any(s => s.WasSuccessful)))
                   .OrderBy(l => l.Snapshots.Any())
                   .ThenBy(l => l.Snapshots