From 1eb71943ad8d4769cb6166a6f33c0eecea80fffe Mon Sep 17 00:00:00 2001
From: crupest <crupest@outlook.com>
Date: Thu, 18 Jun 2020 17:13:08 +0800
Subject: feat(back): Timeline service add last modified.

---
 Timeline/Services/TimelineService.cs | 55 +++++++++++++++++++++++++++---------
 1 file changed, 41 insertions(+), 14 deletions(-)

(limited to 'Timeline/Services/TimelineService.cs')

diff --git a/Timeline/Services/TimelineService.cs b/Timeline/Services/TimelineService.cs
index ba5576d1..6c1e91c6 100644
--- a/Timeline/Services/TimelineService.cs
+++ b/Timeline/Services/TimelineService.cs
@@ -15,6 +15,23 @@ using static Timeline.Resources.Services.TimelineService;
 
 namespace Timeline.Services
 {
+    public static class TimelineHelper
+    {
+        public static string ExtractTimelineName(string name, out bool isPersonal)
+        {
+            if (name.StartsWith("@", StringComparison.OrdinalIgnoreCase))
+            {
+                isPersonal = true;
+                return name.Substring(1);
+            }
+            else
+            {
+                isPersonal = false;
+                return name;
+            }
+        }
+    }
+
     public enum TimelineUserRelationshipType
     {
         Own = 0b1,
@@ -383,19 +400,7 @@ namespace Timeline.Services
             };
         }
 
-        private static string ExtractTimelineName(string name, out bool isPersonal)
-        {
-            if (name.StartsWith("@", StringComparison.OrdinalIgnoreCase))
-            {
-                isPersonal = true;
-                return name.Substring(1);
-            }
-            else
-            {
-                isPersonal = false;
-                return name;
-            }
-        }
+
 
         // Get timeline id by name. If it is a personal timeline and it does not exist, it will be created.
         //
@@ -407,7 +412,7 @@ namespace Timeline.Services
         // It follows all timeline-related function common interface contracts.
         private async Task<long> FindTimelineId(string timelineName)
         {
-            timelineName = ExtractTimelineName(timelineName, out var isPersonal);
+            timelineName = TimelineHelper.ExtractTimelineName(timelineName, out var isPersonal);
 
             if (isPersonal)
             {
@@ -713,16 +718,26 @@ namespace Timeline.Services
 
             var timelineEntity = await _database.Timelines.Where(t => t.Id == timelineId).SingleAsync();
 
+            var changed = false;
+
             if (newProperties.Description != null)
             {
+                changed = true;
                 timelineEntity.Description = newProperties.Description;
             }
 
             if (newProperties.Visibility.HasValue)
             {
+                changed = true;
                 timelineEntity.Visibility = newProperties.Visibility.Value;
             }
 
+            if (changed)
+            {
+                var currentTime = _clock.GetCurrentTime();
+                timelineEntity.LastModified = currentTime;
+            }
+
             await _database.SaveChangesAsync();
         }
 
@@ -768,8 +783,17 @@ namespace Timeline.Services
                     simplifiedAdd.Remove(u);
                     simplifiedRemove.Remove(u);
                 }
+
+                if (simplifiedAdd.Count == 0)
+                    simplifiedAdd = null;
+
+                if (simplifiedRemove.Count == 0)
+                    simplifiedRemove = null;
             }
 
+            if (simplifiedAdd == null && simplifiedRemove == null)
+                return;
+
             var timelineId = await FindTimelineId(timelineName);
 
             async Task<List<long>?> CheckExistenceAndGetId(List<string>? list)
@@ -799,6 +823,9 @@ namespace Timeline.Services
                 _database.TimelineMembers.RemoveRange(membersToRemove);
             }
 
+            var timelineEntity = await _database.Timelines.Where(t => t.Id == timelineId).SingleAsync();
+            timelineEntity.LastModified = _clock.GetCurrentTime();
+
             await _database.SaveChangesAsync();
         }
 
-- 
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