From 0fe8990f9987669868823548fe09e251d063d0c7 Mon Sep 17 00:00:00 2001
From: arkon <eugcheung94@gmail.com>
Date: Sat, 1 Aug 2020 16:35:52 -0400
Subject: [PATCH] Filter out chapter entries with duplicate URLs (fixes #3552)

(cherry picked from commit 0d15cbe334de7f62cb3a5e1fc67bebb5261df86b)
---
 .../tachiyomi/util/chapter/ChapterSourceSync.kt    | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 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 c6da8f3ee..e2fb0050b 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
@@ -38,13 +38,15 @@ fun syncChaptersWithSource(
     // Chapters from db.
     val dbChapters = db.getChapters(manga).executeAsBlocking()
 
-    val sourceChapters = rawSourceChapters.mapIndexed { i, sChapter ->
-        Chapter.create().apply {
-            copyFrom(sChapter)
-            manga_id = manga.id
-            source_order = i
+    val sourceChapters = rawSourceChapters
+        .distinctBy { it.url }
+        .mapIndexed { i, sChapter ->
+            Chapter.create().apply {
+                copyFrom(sChapter)
+                manga_id = manga.id
+                source_order = i
+            }
         }
-    }
 
     // Chapters from the source not in db.
     val toAdd = mutableListOf<Chapter>()