From 7eed8c440c2a8c2c2b65bf20118398fea6ab1fae Mon Sep 17 00:00:00 2001
From: FourTOne5 <59261191+FourTOne5@users.noreply.github.com>
Date: Fri, 24 Dec 2021 20:28:48 +0600
Subject: [PATCH] Fix readded chapters polluting 'Updates' tab. (#6377)

---
 .../tachiyomi/util/chapter/ChapterSourceSync.kt    | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/app/src/main/java/eu/kanade/tachiyomi/util/chapter/ChapterSourceSync.kt b/app/src/main/java/eu/kanade/tachiyomi/util/chapter/ChapterSourceSync.kt
index 93730d7312..c62427737b 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/util/chapter/ChapterSourceSync.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/util/chapter/ChapterSourceSync.kt
@@ -121,11 +121,17 @@ fun syncChaptersWithSource(
             for (i in toAdd.indices.reversed()) {
                 val chapter = toAdd[i]
                 chapter.date_fetch = now++
-                // Try to mark already read chapters as read when the source deletes them
-                if (chapter.isRecognizedNumber && chapter.chapter_number in deletedReadChapterNumbers) {
-                    chapter.read = true
-                }
+
                 if (chapter.isRecognizedNumber && chapter.chapter_number in deletedChapterNumbers) {
+                    // Try to mark already read chapters as read when the source deletes them
+                    if (chapter.chapter_number in deletedReadChapterNumbers) {
+                        chapter.read = true
+                    }
+                    // Try to to use the fetch date it originally had to not pollute 'Updates' tab
+                    toDelete.filter { it.chapter_number == chapter.chapter_number }
+                        .minByOrNull { it.date_fetch }!!.let {
+                            chapter.date_fetch = it.date_fetch
+                        }
                     readded.add(chapter)
                 }
             }